WO2025084958A1 - Modular system for the preparation and distribution of gases - Google Patents

Abstract

The invention relates to modular systems that make it possible to take into account the individual characteristics of a gas arriving from an external source. The present modular system for the preparation and distribution of gases comprises a gas distribution module, a gas analysis module, a control module, and a gas mixing module, which are connected by pipelines and data cables, and isolation valves. The technical result is the possibility of automatically controlling the system in real time to supply a fuel gas having a given calorific value to a gas-fueled consumer appliance, while at the same time minimizing the harmful emissions (СО, NO, СО₂, NO₂) contained in the combustion products.

Description

MODULAR SYSTEM FOR GAS PREPARATION AND DISTRIBUTION

DESCRIPTION

The invention relates to gas distribution systems [IPC: F17D1/04, F17D3/00, F17D3/01, F17D3/18, F23N1/02; IPC: F17D1/04, F17D3/00, F17D3/01, F17D3/18, F23N1/02],

The prior art discloses a BLOCK AUTOMATIC GAS MIXING AND GAS DISTRIBUTION SYSTEM FOR PRODUCING A MIXTURE OF COMBUSTIBLE GAS WITH AIR WITH A SINGLE HEAT OF COMBUSTION [EA200301285 A1, published 22.12.2003], which contains units for reducing, switching, gas heating, a protective system, gas metering and consumption at the inlet, odorization, signaling and instrumentation, characterized in that it additionally includes an automatic gas mixing station (AGS) installed on gas distribution systems for gas supply to cities and populated areas, wherein the automatic gas mixing station contains: a) an air compressor unit, consisting of an air compressor, a filter, a receiver, a reduction unit and a check valve; b) a gas and air mixer unit consisting of a gas mixer, an adjustable ejector mixing unit including four fans and four adjustable ejector mixers containing an adjustable nozzle, a mixing chamber, a diffuser, a confuser and a branch pipe; c) a proportional device unit consisting of an air flow meter sensor, an air flow regulating valve, a gas flow regulating check valve, a gas flow meter sensor and a gas and air ratio regulator.

The disadvantage of this analogue is that this system does not provide the possibility of automatic control in real time for supplying a given calorific value of gas fuel to the consumer's gas burner equipment, as a result of which gas consumption increases, and there is no possibility of minimizing harmful emissions (CO, NO, CO2, N02) contained in combustion products.

In addition, a LOW-CONCENTRATION GAS UTILIZATION SYSTEM (ENTR AT (II) [CN214944408U, published 11/30/2021] is known from the prior art, including a low-concentration gas supply system, a high-concentration gas supply system, a mixer, a gas distribution and safe transportation system, a combustion heat recovery system and a main line, a control device; The low-concentration gas supply system includes a low concentration gas pipeline, wherein the outlet of the low concentration gas pipeline is connected to the low concentration gas inlet of the mixer; The low concentration gas pipeline is provided with low concentration gas. A pressure measuring manometer, a low concentration gas concentration detector, a low concentration gas flow detector, and a low concentration gas regulating valve; The high concentration gas supply system includes a high concentration gas pipeline, wherein the outlet of the high concentration gas pipeline is connected to the high concentration gas inlet of the mixer; the high concentration gas pipeline is provided with high concentration gas. A pressure detector, a high concentration gas concentration detector, a high concentration gas flow detector, and a high concentration gas regulating valve; The gas distribution and safety supply system includes a mixed gas pipeline, a tail gas pipeline, an inert gas return pipeline, a nitrogen protection pipeline, a heat exchanger, and a circulation fan; The mixed gas pipeline is a two-layer structure with an internal and external sleeve; the inlet end of the internal sleeve is connected to the mixed gas outlet of the mixer, and the outlet end of the internal sleeve is connected to the heat exchanger. A low-temperature inlet of the heat exchanger is connected; the low-temperature outlet of the heat exchanger is connected to the combustion heat recovery system;

The high temperature outlet of the heat exchanger is respectively connected to the inert gas return line and the inert gas return line, the other end of the inert gas return line is connected to the outer casing, and the inert gas return line is provided with an inert gas pressure gauge, an inert gas return line. Concentration detector, an inert gas flow detector and an inert gas regulating valve;

The nitrogen protection pipeline is connected to the outer casing, and the nitrogen protection pipeline is equipped with a nitrogen regulating valve;

The outer casing is provided with an inert gas outlet, and the inert gas outlet is connected to the tail gas pipeline;

The inlet of the circulation fan is connected to the outlet of the combustion heat recovery system, and the outlet of the circulation fan is connected to the high temperature inlet of the heat exchanger;

Low concentration gas pressure detector, low concentration gas concentration detector, low concentration gas flow detector, low concentration gas control valve, high concentration gas pressure detector, high concentration gas concentration detector, high concentration gas flow detector, high concentration gas control valve, inert gas pressure sensor, Inert gas concentration detector, inert gas flow detector, inert gas regulating valve, nitrogen regulating valve, circulation fan and combustion heat recovery system are all connected to the main control unit which controls the system.

The disadvantage of this analogue is that this system does not provide the possibility of automatic control in real time for supplying a given calorific value of gas fuel to the consumer's gas burner equipment, as a result of which gas consumption increases, and there is no possibility of minimizing harmful emissions (CO, NO, CO2, N02) contained in combustion products.

In addition, the prior art discloses a SYSTEM FOR CONTROLLING A NATURAL GAS PIPELINE IN FRONT OF A FURNACE [CN216743848U, published 06/14/2022], which includes a natural gas pipeline, a filter bypass pipeline, and a dispersion pipeline; the natural gas pipeline consists of a front section of the gas pipeline and a rear section of the natural gas pipeline, wherein the front section of the gas pipeline is located along the flow direction of the natural gas. In addition, a manual shut-off valve A and a natural gas filter A are installed in series, a natural gas filter B is installed on the filter bypass pipe, and the natural gas filter B is connected in parallel to the natural gas filter A through the filter bypass pipe; the front section of the natural gas in front of the natural gas filter A on the pipeline has a manual shut-off valve B, and a manual shut-off valve D on the front part of the gas pipeline after the natural gas filter A; a manual shut-off valve F on the bypass pipe of the filter before the natural gas filter B and a filter bypass after the natural gas filter, the natural gas filter B. The pipeline is equipped with a manual shut-off valve G, an automatic pressure regulating valve is installed between the front of the gas pipeline and the rear of the gas pipeline, the rear of the gas pipeline The gas pipeline is equipped with a pressure signal remote transmission device A, a flow rate signal remote transmission device and a temperature signal remote transmission device in series along the flow direction of the natural gas. The remote signal transmission device, the pneumatic shut-off valve A, the pressure signal, the remote transmission device B, the electric flow rate regulating valve, the pneumatic shut-off valve B, the remote pressure signal transmission device C, a check valve, a manual shut-off valve E and a natural gas/combustion air mixer; the radiating pipe consists of a main radiating device pipe and a radiating branch pipe 1, a radiating branch pipe 2, a radiating branch pipe 3, a radiating branch pipe 4 and radiating branch pipe 5. The main radiating pipe is connected to the outlet of the automatic pressure regulating valve through the radiating branch pipe, branch pipe 1. At the rear section of the gas pipeline, a safety valve is installed on the first branch pipe, the main branch pipeline is connected to the rear section of the gas pipeline before the pneumatic shut-off valve A. through the second expanding branch pipe; the second expanding branch pipe is equipped with a manual shut-off valve H; the main expanding pipeline passes through the expanding branch pipe. The third branch pipeline is connected to the rear gas pipeline after the pneumatic bleed, the shut-off valve A, and the automatic safety valve is installed on the branch branch pipeline 3; the main outgoing pipeline is connected to the rear natural gas pipeline after the electric flow regulating valve through the outgoing branch pipeline 4, and the outgoing branch pipeline four is connected to the rear gas pipeline after the electric flow regulating valve. Install the manual shut-off valve I; The main diverging pipeline is connected to the rear gas pipeline in front of the check valve through the diverging branch pipe 5, and a manual shut-off valve J is installed on the expanding branch pipe 5.

The disadvantage of this analogue is that this system does not provide the possibility of automatic control in real time for supplying a given calorific value of gas fuel to the consumer's gas burner equipment, as a result of which gas consumption increases, and there is no possibility of minimizing harmful emissions (CO, NO, CO2, N02) contained in combustion products.

The closest in technical essence is the SYSTEM FOR AUTOMATIC ADJUSTMENT OF NATURAL GAS PIPELINE IN FRONT OF FURNACE AND THE METHOD OF ITS OPERATION [CN114110429A, published 01.03.2022], comprising a gas pipeline, a filter bypass pipeline and an outlet pipeline; the natural gas pipeline consists of a natural gas pipeline in the front part and a natural gas pipeline in the rear part, wherein the natural gas pipeline in the front part is arranged in series along the flow direction of the natural gas. A manual shut-off valve A and a natural gas filter A are provided; a natural gas filter B is located on the filter bypass pipeline, and the natural gas filter B is connected in parallel with the natural gas filter A through the filter bypass pipeline; A manual shut-off valve B is installed in the upper part, and a manual shut-off valve D is installed on the front natural gas pipeline downstream of the natural gas filter A; manual shut-off valve F is installed on the filter bypass pipe before the natural gas filter B, and the filter bypass pipe after the natural gas filter gas B is installed. A manual shut-off valve G is installed at the upper part; an automatic pressure regulating valve is installed between the natural gas pipeline at the front part and the natural gas pipeline at the rear part; a remote gas transmission device A for a pressure signal, a remote transmission device for a flow rate signal and a temperature signal are arranged in series along the flow direction of the natural gas on the natural gas pipeline at the rear part. The remote transmission device, the pneumatic shut-off valve A, the remote transmission device for a pressure signal B, the electric flow regulating valve, the pneumatic shut-off valve B, the remote transmission device for a pressure signal C, a check valve, a manual shut-off valve E and a natural gas/combustion air mixer; The entire exhaust pipeline consists of an exhaust main pipeline, an exhaust branch 1, a vent branch 2, a vent branch 3, a vent branch 4 and a vent branch 5. A safety valve is installed on the first part of the gas exhaust branch. ; the main gas outlet pipeline is connected to the last gas pipeline before the pneumatic shut-off valve A through the gas outlet branch pipeline 2, and a manual shut-off valve H is installed on the second gas outlet branch pipeline; the ventilation branch pipe pipeline passes through the ventilation branch pipe. Pipeline 3 is connected to the rear gas pipeline after the pneumatic shut-off valve A, and an automatic vent valve is installed on the third branch pipe; Manual shut-off valve I; the gas outlet main pipeline is connected to the gas pipeline before the check valve through the gas outlet branch pipe 5, and a manual shut-off valve J is installed on the gas outlet branch pipe 5.

In this case, the method of operation of the automatic adjustment system of the natural gas pipeline in front of the furnace includes:

1) Normal working condition:

After the gas in the natural gas pipeline is first replaced by inert gas, the natural gas flows from the inlet end of the natural gas pipeline, and its pressure exceeds the pressure required at the outlet end; the automatic pressure regulating valve, the pneumatic shut-off valve A, the electric flow regulating valve, the pneumatic shut-off valve B and the manual shut-off valve E are opened, and the other valves are closed; adjust the automatic pressure regulating valve and the electric flow regulating valve so that the flow value and the pressure value are close to the target value, and then switch the system to the automatic mode; the target value is compared and is evaluated for the implementation of automatic adjustment of the locking degree of opening and closing of shut-off valves;

2) Filter service status:

When it is necessary to repair the natural gas filter A, close the manual shut-off valve P, open the manual shut-off valve F and the manual shut-off valve G at the same time, and then close the manual shut-off valve B and the manual shut-off valve D to connect the filter bypass pipe, open the manual shut-off valve C to release the pressure and drain. When the pressure gauge B shows normal pressure, repair, clean or replace the natural gas filter A; then close the manual shut-off valve C, open the manual shut-off valve B and the manual shut-off valve D in sequence. Close the manual shut-off valve F and the manual shut-off valve G, and return the system to the normal working state;

3) Power failure status:

When the power supply fails, the pneumatic shut-off valve A and the pneumatic shut-off valve B will automatically close and will not open again until the power supply is restored;

4) Abnormal pressure condition:

When the pressure at the inlet end of the natural gas pipeline exceeds the set value, the safety valve automatically opens to protect against pressure release; at the same time, the central control system displays the abnormal pressure alarm, and manually selects whether to open the automatic discharge valve to discharge; if the inlet end of the natural gas pipeline, when the pressure is lower than the set value, the pneumatic shut-off valve A and the pneumatic shut-off valve B are automatically closed, and the backflow of the gas mixture containing air is prevented through the check valve;

5) Long-term cessation of work:

If the production is stopped for a long time, first close the manual shut-off valve A on the gas pipeline, and then open the manual shut-off valve H, manual shut-off valve I and manual shut-off valve J to gradually release the residual natural gas from the gas pipeline.

The disadvantage of the prototype is that it does not have the ability to automatically control the system in real time in order to supply a given calorific value of gas fuel to the consumer while simultaneously minimizing harmful emissions (CO, NO, CO2, N02) contained in combustion products. The objective of the invention is to eliminate the shortcomings of the prototype and create a system that allows taking into account the individual characteristics of gas supplied from an external source, as well as minimizing the consumption of such gas by 5% in automatic mode, while simultaneously maintaining the calorific value of the gas fuel supplied to the consumer's gas burner equipment at a given level, minimizing the volume of harmful emissions contained in the combustion products of such gas fuel.

The technical result of the present invention is to provide the ability to automatically control the system in real time for the purpose of supplying gas fuel of a given calorific value to the consumer's gas burner equipment while simultaneously minimizing harmful emissions (CO, NO, CO2, N02) contained in combustion products.

The specified technical result is achieved due to the fact that the modular gas preparation and distribution system, comprising a gas distribution module, a gas analysis module, a control module, a gas mixing module, a gas sampling pipeline, a gas fuel sampling pipeline and an oxidizer sampling pipeline, a gas supply line to the gas distribution module, a gas supply line from the gas distribution module to the gas mixing module, an oxidizer supply line to the gas mixing module, a gas fuel supply line to the consumer's gas burner equipment, a combustion product removal line and data transmission cables, wherein the gas distribution and gas mixing modules contain shut-off valves, characterized in that it contains a pipeline connecting the combustion product removal line and the gas analysis module, configured to take combustion product samples, the gas analysis module contains measuring equipment, and the control module is connected to the gas distribution module, the gas analysis module and the gas mixing module by means of data transmission cables and contains means for automatically calculating the degree of opening of the shut-off valves of the gas distribution modules and gas mixing, means for interaction with the shut-off valves of the gas distribution module and the gas mixing module, and means for interaction with the measuring equipment of the gas analysis module, and the gas mixing module contains ejectors and shut-off valves designed with the possibility of control from an external source. In particular, the gas analysis module contains measuring equipment such as calorimeters, gas analyzers and gas chromatographs, designed with the ability to be controlled from an external source.

In particular, the control module contains a limit switch unit and an automated control system unit, which is a software and hardware complex.

In particular, the limit switch block contains control panels, switches and relays.

Brief description of the drawings.

Fig. 1 - Functional diagram of the MSPRG.

Fig. 2 - Functional diagram of the MSPRG control module.

Fig.3 - Block diagram of the method for automatic control of the operation of the MSPR.

The following are indicated on the figures: 1 - gas distribution module, 2 - gas analysis module, 3 - control module, 4 - gas mixing module, 5 - main lines, 6 - pipelines, 7 - data transmission cables, 8 - shut-off valves, 9 - consumer gas burner equipment, 10 - limit switch unit, 11 - automated control system unit, 12 - manual control panels, 13 - relays, 14 - switches, 15 - means of interaction with measuring equipment, 16 - means of automatic calculation of the degree of opening of the shut-off valves to optimize the calorific value of gas fuel, 17 - means of automatic calculation of the degree of opening of the shut-off valves to minimize the content of harmful emissions in combustion products, 18 - means of automatic calculation of the degree of opening of the shut-off valves in the gas distribution and gas mixing modules to ensure the ratio of oxidizer and gas in the gas fuel in ratios that meet safety requirements, 19 - means of interaction with the shut-off reinforcement.

Here and below, the degree of opening of a shut-off valve is understood to be a value that determines the volume of a gas mixture (gas/oxidizer/gas fuel) passing through the shut-off valve per unit of time.

Implementation of the invention.

The modular gas preparation and distribution system (hereinafter referred to as the MSPGD) (Fig. 1) contains a gas distribution module 1, a gas analysis module 2, a control module 3, a gas mixing module 4, main lines 5, pipelines 6 and data transmission cables 7. The gas distribution module 1, designed with the possibility of providing a decrease in the pressure of the gas mixture from the level of gas pressure in the main line 5 to the level of gas pressure required by the consumer, includes standard equipment for gas distribution devices (GDU), gas distribution substations (GDS) or gas distribution stations (GDS), namely filters, safety shut-off valves, gas pressure regulators, safety relief valves, control and measuring devices, gas flow meters, shut-off valves 8, as well as a bypass gas pipeline device, which is two shut-off devices and a purge pipeline between them, wherein the shut-off valve 8 is designed with the possibility of controlling and changing the degree of opening according to a signal from the control module 3.

The gas mixing module 4, designed with the possibility of mixing gas and oxidizer with the formation of gas fuel, includes ejectors, the number of which is determined by a calculation method depending on the gas consumption of the consumer's gas burner equipment 9, and shut-off valves 8, designed with the possibility of regulating the supply of gas and oxidizer to the ejectors, wherein the shut-off valves 8 are designed with the possibility of controlling and changing the degree of opening according to a signal from the control module 3.

Gas analysis module 2, designed with the ability to determine in real time the calorific value and composition of gas and gas fuel, as well as the composition of the oxidizer and combustion products, including measuring devices such as calorimeters, gas analyzers and gas chromatographs, designed with the ability to receive signals from control module 3 specifying time intervals for taking measurements and transmitting measurement results to control module 3.

The control module 3 (Fig. 2) includes a block of limit switches 10, designed to provide manual control of the MSPRH, containing control panels 12, relays 13 and switches 14, as well as a block of the automated control system 11, containing a software and hardware complex (not shown in the figures), containing means for interacting with measuring equipment 15, means for automatically calculating the degree of opening of the shut-off valves to optimize the calorific value of gas fuel 16, means for automatically calculating the degree of opening of the shut-off valves to minimize the content of harmful emissions in combustion products 17, means for automatically calculating the degree of opening of the shut-off valves in the gas distribution and gas mixing modules to ensure the ratio of oxidizer and gas in gas fuel in ratios corresponding to safety requirements 18, and means for interaction with shut-off valves 19, designed with the possibility of control by a signal from an external source. In this case, the means for interaction with measuring equipment 15, the means for automatic calculation of the degree of opening of the shut-off valves for optimizing the calorific value of gas fuel 16, the means for automatic calculation of the degree of opening of the shut-off valves for minimizing the content of harmful emissions in combustion products 17, the means for automatic calculation of the degree of opening of the shut-off valves in the gas distribution and gas mixing modules to ensure the ratio of the oxidizer and gas in the gas fuel in ratios corresponding to safety requirements 18, and the means for interaction with the shut-off valves 19 are software and hardware, such as specialized software and electronic computing devices (computers) that ensure the functioning of such specialized software and switches that ensure the reception and transmission of data between devices.

The control module 3 is connected to the gas distribution module 1, the gas analysis module 2 and the gas mixing module 4 by means of data transmission cables 7.

The main line 5, designed with the possibility of supplying gas from an external source (not shown in the figures), is connected to the gas distribution module 1.

The gas distribution module 1 is connected to the gas mixing module 4 by means of a line 5, designed with the possibility of supplying gas from the gas distribution module 1 to the gas mixing module 4.

The gas mixing module 4 is connected by means of a pipeline 5, designed with the possibility of feeding an oxidizer to the gas mixing module, to an external source of oxidizer supply (not shown in the figures), wherein air, or oxygen, or blast furnace gas can be used as an oxidizer, and also to the consumer's gas burner equipment 9 by means of a pipeline 5, designed with the possibility of feeding gas fuel formed as a result of mixing gas and oxidizer in the gas mixing module.

4, on the consumer's gas burner equipment.

In addition, the consumer's gas burner equipment 9 is connected to the main line.

5, designed with the possibility of removing combustion products from the consumer’s gas burner equipment 9.

The gas analysis module 2 is connected by means of a pipeline 6, designed with the possibility of taking gas samples, to the main line 5, connecting the gas distribution module 1 and the gas mixing module 4, by means of a pipeline 6, designed with the possibility of sampling of gas fuel, with main line 5 connecting gas mixing module 4 and consumer gas burner equipment 9, using pipeline 6, configured to take samples of oxidizer, with main line 5 connecting gas mixing module 4 with an external source of oxidizer supply (not shown in the figures), and also using pipeline 6, configured to take samples of combustion products, with main line 5, configured to remove combustion products from consumer gas burner equipment 9.

The use of a gas analysis module 2 in the MSPRGS, which contains measuring equipment such as calorimeters, gas analyzers and gas chromatographs, designed with the possibility of receiving signals from the control module 3 specifying time intervals for carrying out measurements and transmitting the measurement results to the control module 3, makes it possible to carry out in real time the entire range of analyses necessary for determining the calorific value of gas and gas fuel, as well as the concentration of O2 in the gas and oxidizer, for assessing the compliance of gas fuel with safety requirements, as well as the content of harmful emissions in combustion products such as CO, NO, CO2, N02, and also transmitting the results of such analyses to the control module 3 for the purpose of automatic control of the MSPRGS.

The connection of the control module 3 with the gas distribution module 1, the gas analysis module 2 and the gas mixing module 4 by means of data transmission cables 7 provides the possibility of transmitting control commands from the control module 3 to the gas distribution module 1, the gas analysis module 2 and the gas mixing module 4, as well as receiving the analysis results from the measuring equipment of the gas analysis module 2, for the purpose of processing such analysis results and generating control commands.

The use of a pipeline 6 in the MSPRG, designed with the possibility of sampling combustion products, allows for the real-time sampling of combustion products from the main line 5, designed with the possibility of removing combustion products from the consumer's gas burner equipment 9, as well as the prompt delivery of such samples to the gas analysis module 2 and the analysis of such samples for the content of harmful emissions in them, such as CO, NO, CO2, N02, and taking into account the results of such analysis when calculating the degree of opening of the shut-off valve 8 of the gas distribution module 1 and the gas mixing module 4 in order to optimize the calorific value of the gas fuel while simultaneously minimizing the content of harmful emissions in the combustion products. The use of means for automatic calculation of the degree of opening of shut-off valves in the control module 3 for minimizing the content of harmful emissions in combustion products 17, allows, on the basis of data on the calorific value and composition of gas and gas fuel, as well as the composition of the oxidizer and combustion products, obtained in real time from the gas analysis module 2, also in real time, to calculate the optimal degree of opening of shut-off valves 8 of the gas distribution modules 1 and gas mixing modules 4, which allows optimizing the calorific value of gas fuel for the purpose of saving it and simultaneously minimizing the content of harmful emissions in combustion products.

For the purpose of testing, a prototype of the MSPRG was installed at one of the industrial enterprises, containing a gas distribution module 1, a gas analysis module 2, a control module 3, a gas mixing module 4, main lines 5, pipelines 6 and data transmission cables 7.

The gas distribution module 1 was designed with the ability to provide a reduction in the pressure of the gas mixture coming from an external source, which was a gas field, from the gas pressure level in the main line to the gas pressure level required by the consumer and included standard equipment for gas distribution devices (GDU), gas distribution substations (GDS) or gas distribution stations (GDS), namely filters, safety shut-off valves, gas pressure regulators, safety relief valves, control and measuring devices, gas flow meters, shut-off valves 8, as well as a bypass gas pipeline device, which is two shut-off devices and a blow-off pipeline between them, wherein the shut-off valve 8 was designed with the ability to be controlled by a signal from the control module 3.

The gas mixing module 4 was designed with the ability to mix gas and oxidizer, and included ejectors, the number of which made it possible to ensure the mixing of gas and oxidizer in the volumes required to ensure the necessary gas flow rate by the consumer's gas burner equipment 9, and shut-off valves 8 designed with the ability to regulate the supply of gas and oxidizer to the ejectors, while shut-off valves 8 were designed with the ability to be controlled by a signal from the control module 3.

Gas analysis module 2 was designed with the ability to determine in real time the calorific value and composition of gas and gas fuel, as well as the composition oxidizer and combustion products, and included measuring instruments such as calorimeters, gas analyzers and gas chromatographs, designed with the ability to receive signals from control module 3 setting time intervals for taking measurements and transmitting measurement results to control module 3.

The control module 3 (Fig. 2) included a block of limit switches 10, designed to provide manual control of the prototype of the MSPRG, and contained control panels 12, relays 13 and switches 14, as well as a block of the automated control system 10, which contained a software and hardware complex (not shown in the figures), including means for interacting with measuring equipment 15, means for automatically calculating the degree of opening of the shut-off valves to optimize the calorific value of the gas fuel 16, means for automatically calculating the degree of opening of the shut-off valves to minimize the content of harmful emissions in combustion products 17, means for automatically calculating the degree of opening of the shut-off valves in the gas distribution and gas mixing modules to ensure the ratio of the oxidizer and gas in the gas fuel in ratios corresponding to safety requirements 18 and means for interacting with the shut-off valves 19.

In addition, the prototype of the MSPRG contained a line 5, designed with the possibility of supplying gas from an external source (not shown in the figures), connected to the gas distribution module 1. In this case, the gas distribution module 1 is connected to the gas mixing module 4 by means of a line 5, designed with the possibility of supplying gas from the gas distribution module 1 to the gas mixing module 4, and to the control module 3 by means of data transmission cables?.

In addition, the prototype of the MSPRG contained a gas mixing module 4, which was connected to the consumer gas burner equipment 9 using a line 5, to the control module 3 using data transmission cables 7, and also to an external oxidizer supply source (not shown in the figures) using a line 6. In addition, the consumer gas burner equipment 9 is connected to a line 6, designed with the possibility of removing combustion products from the consumer gas burner equipment 9.

In addition, the prototype of the MSPRG contained a gas analysis module 2, which was connected to the control module 3 using data transmission cables 7, as well as using a pipeline 6, designed with the possibility of taking gas samples, with a main line 5 connecting the gas distribution module 1 and the gas mixing module 4, using a pipeline 6, designed with the possibility of taking gas fuel samples, with a main line 5 connecting the gas mixing module 4 and the gas burner equipment. consumer 9, with the help of pipeline 6, designed with the possibility of taking samples of the oxidizer, with main line 5, connecting gas mixing module 4 with an external source of oxidizer supply (not shown in the figures), and also with the help of pipeline 6, designed with the possibility of taking samples of combustion products, with main line 5, designed with the possibility of removing combustion products from the gas burner equipment of consumer 9.

The MSPRG is used as follows.

After the installation of the MSPG at the facility, the MSPG is switched on and configured in manual mode with the determination of the initial parameters of the system and the input of such parameters into the automated control system unit of control module 3. After which gas is supplied to the MSPG from an external gas source, for example, a gas field, and the oxidizer is supplied from an external oxidizer source, for example, a storage tank. After which, data on the required calorific value of the gas fuel, as well as the size of the time interval between checks of the actual value of the calorific value of the gas fuel compliance with the specified value, are entered into the automated control system unit, the gas and oxidizer are shifted to the state of the gas fuel, the gas fuel is supplied to the consumer's gas burner equipment and the cycle of checking the compliance of the calorific value of the gas fuel with the specified value is initiated. After which actions are performed within the cycle of checking the compliance of the calorific value of the gas fuel with the required value, upon completion of which a check is performed for the receipt of a signal on the need to interrupt the repetition of the cycle of checking the compliance of the calorific value of the gas fuel with the required value. After that, if a signal about the need to interrupt the repetition of the cycle of checking the compliance of the calorific value of the gas fuel with the required value has been received, a check is carried out for the receipt of a signal about the need to turn off the MSPRG. After that, if a signal about the need to turn off the MSPRG has been received, the supply of gas and oxidizer to the system is stopped and the MSPRG is turned off.

In this case, if the signal about the need to interrupt the repetition of the cycle of checking the compliance of the calorific value of the gas fuel with the required value is not received, the time is counted down until the end of the period until the next check of the assessment of the gas fuel for calorific value, after which all actions are repeated after the initiation of the cycle of checking the compliance of the calorific value of the gas fuel with the specified value. In this case, if the signal about the need to turn off the MSPRG is not received, the actions within the cycle of checking the compliance of the calorific value of the gas fuel with the required value are interrupted, after which all actions are repeated starting with entering into the automated control system unit data on the required calorific value of the gas fuel and on the size of the time interval between checks of compliance of the actual value of the calorific value of the gas fuel with the specified value.

In addition, as part of the cycle of checking the compliance of the calorific value of gas fuel, the following actions are carried out:

Using pipeline 6, configured to take gas fuel samples, samples of gas fuel are taken after gas mixing module 4, such samples are analyzed for calorific value, and such samples are assessed for compliance with the previously specified value of the required calorific value of gas fuel. After that, if the actual calorific value of gas fuel corresponds to the previously specified value of the required calorific value of gas fuel, using pipeline 6, configured to take gas samples, a gas sample is taken before gas mixing module 4, such samples are analyzed for calorific value, and the concentration of O2, CO, CO2, NO, N02 in such samples. At the same time, the oxidizer supply to gas mixing module 4 is checked and, using pipeline 6, configured to take oxidizer samples, an oxidizer sample is taken before gas mixing module 4 and such samples are analyzed for determining the concentration of O2, CO, CO2, NO, N02 in such samples. At the same time, using pipeline 6, designed with the possibility of sampling combustion products, a sample of combustion products is sampled from main line 5 after consumer gas burner equipment 9, and such samples are analyzed for the concentration of CO, CO2, NO, NO2 in such samples. After which, based on the results of the analysis, using means for automatically calculating the degree of opening of shut-off valves for optimizing the calorific value of gas fuel 16 and means for automatically calculating the degree of opening of shut-off valves for minimizing the content of harmful emissions in combustion products 17, which are part of control module 3, a change in the degree of opening of shut-off valves 8 in gas distribution module 1 and gas mixing module 4 is calculated, which are necessary for reducing the concentration of CO, CO2, NO, NO2 in combustion products while simultaneously maintaining the value of the actual calorific value of gas fuel at the level of the required calorific value. After that, if the calculated degrees of opening of the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 differ from the actual values, using automatic means calculating the degree of opening of the shut-off valves in the gas distribution and gas mixing modules to ensure the ratio of the oxidizer and gas in the gas fuel in ratios corresponding to the safety requirements 18, included in the control module 3, the composition of the gas fuel is predicted after bringing the degree of opening of the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 to the calculated degree of opening, and such predicted composition of the gas fuel is assessed for compliance with the safety requirements, after which, if the predicted composition of the gas fuel meets the safety requirements, using the means of interaction with the shut-off valves 8, configured to be controlled by a signal from an external source, included in the control module 3, the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 are adjusted until the parameters of the degree of opening of the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 are brought to compliance with the calculated parameters and further actions are performed to control the MSPRGS.

In this case, if the predicted composition of the gas fuel does not meet the safety requirements, using the means for automatically calculating the degree of opening of the shut-off valves in the gas distribution and gas mixing modules to ensure the ratio of the oxidizer and gas in the gas fuel in ratios that meet the safety requirements 18, included in the control module 3, the means for automatically calculating the degree of opening of the shut-off valves to minimize the content of harmful emissions in the combustion products 17, included in the control module 3, and the means for automatically calculating the degree of opening of the shut-off valves to optimize the calorific value of the gas fuel 16, included in the control module 3, calculate the parameters of the degree of opening of the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 to ensure the gas flow and the oxidizer flow that meet the safety requirements, while ensuring the maximum possible reduction in the concentration of harmful emissions in the combustion products, while simultaneously maintaining the value of the actual calorific value of the gas fuel at the level of the required calorific value, after which, using the means for interaction with the shut-off valves 8, made with the possibility of control by a signal from an external source, included in the control module 3, adjust the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 until they correspond to such calculated parameters and carry out further actions to control the MSPRG. In this case, if the calculated degree of opening of the shut-off valve 8 in the gas distribution module 1 and the gas mixing module 4 does not differ from the actual values of the degree of opening of the shut-off valve 8 in these modules, the actions within the cycle of checking the conformity of the calorific value of the gas fuel to the specified value are completed and further actions are carried out to control the MSPG.

In this case, if the actual calorific value of the gas fuel does not correspond to the previously specified value of the required calorific value of the gas fuel, using the pipeline 6, designed with the possibility of taking gas samples, a gas sample is taken before the gas mixing module, such a sample is analyzed for calorific value and the concentration of 02 in it, simultaneously with this, the supply of oxidizer to the gas mixing module is checked, and in the event of confirmation of the supply of oxidizer, a sample of oxidizer is taken before the gas mixing module, such samples are analyzed to determine the concentration of 02 in the oxidizer sample, after which, using the means for automatically calculating the degree of opening of the shut-off valves for optimizing the calorific value of gas fuel 16, which are part of the control module 3, the change in the parameters of the degree of opening of the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 is calculated to ensure the gas flow and the oxidizer flow necessary to bring the value of the actual calorific value of the gas fuel to the level of the required calorific value and, using the means for automatically calculating the degree of opening of the shut-off valves in the gas distribution modules and gas mixing to ensure the ratio of the oxidizer and gas in the gas fuel in ratios corresponding to safety requirements 18, included in the control module 3, predict the composition of the gas fuel after changing the parameters of the degree of opening of the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 to the calculated parameters and evaluate such predicted composition of the gas fuel for compliance with the safety requirements. After that, if the predicted composition of the gas fuel meets the safety requirements, with the help of the means of interaction with the shut-off valves 8, made with the possibility of control by a signal from an external source, included in the control module 3, adjust the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 to match such calculated parameters and perform further actions to control the MSPRG.

In this case, if the actual calorific value of the gas fuel does not correspond to the previously specified value of the required calorific value of the gas fuel and if the predicted composition of the gas fuel does not meet the safety requirements, using the means of automatic calculation of the degree of opening of the shut-off valves in in the gas distribution and gas mixing modules for ensuring the ratio of the oxidizer and gas in the gas fuel in ratios corresponding to the safety requirements 18, included in the control module 3, calculate the parameters of the degree of opening of the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 to ensure the gas flow and the oxidizer flow corresponding to the safety requirements, while being the closest for ensuring the gas flow and the oxidizer flow necessary to bring the value of the actual calorific value of the gas fuel to the level of the required calorific value of the gas fuel, after which, using the means of interaction with the shut-off valves 8, configured with the possibility of control by a signal from an external source, included in the control module 3, adjust the shut-off valves 8 in the gas distribution module 1 and the gas mixing module 4 until they correspond to such calculated parameters, after which the actions within the framework of the cycle of checking the conformity of the calorific value of the gas fuel to the specified value are completed and further actions are carried out to control the MSPRGS.

The achievement of the technical result was assessed during the testing of the prototype of the MSPRG experimentally.

Traditionally, when gas fuel is supplied to the consumer's gas burner equipment, the parameters (caloric content, component concentration) of the gas fuel are not regulated in real time, setting a fixed degree of opening of the shut-off equipment in the gas distribution and gas mixing modules. At the same time, both the caloric content of the gas supplied from an external source, in particular a field, and the concentration of the components included in its composition can change over time, which leads to the following consequences: when the caloric content decreases below the required level, the efficiency of the consumer's gas burner equipment decreases; when the caloric content increases above the required level, the consumer's gas burner equipment burns out and its service life is reduced. In addition, no actions are taken to reduce the emitted harmful emissions, which does not reduce the harm caused to the environment. It is with the results of the work of the gas distribution unit, functioning in such a traditional way and previously working at the enterprise, where the experimental model of the MSPRG was mounted and the experimental model of the MSPRG was tested, which allows in real time to maintain the calorific value of the gas fuel supplied to the consumer's gas burner equipment at a given meaning, or in other words, to carry out the process of optimizing the calorific value of gas fuel.

Air, oxygen, or blast furnace gas were used as the oxidizer during various tests.

Based on the results of the MSPRG tests, regardless of the oxidizer type, a decrease in the combustion product temperature was recorded from 165 °C (the combustion product temperature before the introduction of the MSPRG) to 141-144 °C (depending on the gas characteristics and the volume of oxidizer added in the gas mixing module), an increase in the efficiency of the consumer's gas burner equipment from 88.43% to 90.62%, the average savings in gas supplied from an external source during the test period amounted to 5.0%, in addition, during the entire test period, the calorific value of the gas fuel was maintained at a given level, while reducing the concentration of CO in the combustion products to 7.5% of the values without the use of the MSPRG, NO to 95.3% of the values without the use of the MSPRG, and N02 to 95.5% of the values without the use of the MSPRG.

At the same time, as a result of regulating the degree of opening of the shut-off valves 8 in the gas distribution modules 1 and gas mixing modules 4 of the MSPRG, the total gas consumption required for the correct operation of the consumer's gas burner equipment 9 decreased to 95% of the volume that was previously consumed without the use of the MSPRG at the facility, which in turn also led to a final reduction in CO2 emissions to a level of 95% of the values without the use of the MSPRG.

Thus, it was experimentally confirmed that the claimed modular gas preparation and distribution system (MGPS) makes it possible to automatically control the system in real time in order to supply gas fuel of a given calorific value to the consumer's gas burner equipment while simultaneously minimizing harmful emissions (CO, NO, CO2, N02) contained in combustion products.

In addition, a reduction in the volume of gas consumed was additionally ensured without reducing the efficiency of the consumer’s gas burner equipment.

Claims

FORMULA 1. A modular gas preparation and distribution system comprising a gas distribution module, a gas analysis module, a control module, a gas mixing module, a gas sampling pipeline, a gas fuel sampling pipeline and an oxidizer sampling pipeline, a gas supply line to the gas distribution module, a gas supply line from the gas distribution module to the gas mixing module, an oxidizer supply line to the gas mixing module, a gas fuel supply line to the consumer's gas burner equipment, a combustion product removal line and data transmission cables, wherein the gas distribution and gas mixing modules contain shut-off valves, characterized in that it contains a pipeline connecting the combustion product removal line and the gas analysis module configured to take combustion product samples, the gas analysis module contains measuring equipment, and the control module is connected to the gas distribution module, the gas analysis module and the gas mixing module by means of data transmission cables and contains means for automatically calculating the degree of opening of the shut-off valves of the gas distribution and gas mixing modules, means for interacting with the shut-off valves valves of the gas distribution module and the gas mixing module and means for interacting with the measuring equipment of the gas analysis module, and the gas mixing module contains ejectors and shut-off valves designed with the possibility of control from an external source. 2. A modular system for the preparation and distribution of gases according to paragraph 1, characterized in that the gas analysis module contains measuring equipment such as calorimeters, gas analyzers and gas chromatographs, designed with the ability to be controlled from an external source. 3. A modular system for the preparation and distribution of gases according to paragraph 1, characterized in that the control module contains a limit switch unit and an automated control system unit, which is a hardware and software complex. 4. Modular system for the preparation and distribution of gases according to I.6, characterized in that the limit switch unit contains control panels, switches and relays.