CN107120826A - Modular gas-electricity hot water supply system - Google Patents

Abstract

The invention provides a modular gas-electricity combined hot water supply system which comprises a four-stage heat exchange system, wherein the first-stage heat exchange system comprises a double-spiral heat receiver and an atmospheric pressure infrared burner, the atmospheric pressure infrared burner is arranged below the double-spiral heat receiver, the double-spiral heat receiver is cylindrical, an axis water outlet pipe is arranged in the middle of the double-spiral heat receiver, a fireplace interlayer is circumferentially arranged on the inner wall of the cylinder of the double-spiral heat receiver and connected with a plurality of double-spiral coil pipes, each double-spiral coil pipe comprises two branch pipes and two spiral coil pipes, the two branch pipes are symmetrical about the axis of the cylinder, one end of each branch pipe is connected with the fireplace interlayer, the other end of each branch pipe. The invention adopts four times of heat exchange, greatly improves the utilization rate of combustion heat, effectively divides the heat source by using a spiral structure, enlarges the heating range, improves the water outlet temperature, saves energy and has high heat exchange efficiency.

Description

Modular gas-electricity hot water supply system

technical field

The invention relates to a hot water supply system, in particular to a modular gas-electricity combined hot water supply system, which belongs to the field of combustion heat supply.

technical background

Heat exchange and heating systems are widely used in production and life, such as chemical industry, metallurgy, machinery, construction, food, medicine, aerospace and other industrial sectors. For household heating, how to maximize the efficiency of heat energy Utilization rate, ensuring the heating temperature, increasing the heating area and reducing the waste of resources are the top priorities. Therefore, it is necessary for the combustion heating industry to optimize the design of the heat exchange system and improve the heat exchange efficiency.

Contents of the invention

According to technical requirements, the present invention provides a modular gas-electricity cogeneration hot water supply system with high heat exchange efficiency, including a primary heat exchange system, a secondary heat exchange system, a third stage heat exchange system and a fourth stage heat exchange system, and a circulating water pump Connect to the water inlet of the fourth-stage heat exchange system through water pipes, the water outlet of the fourth-stage heat exchange system is connected to the water inlet of the third-stage heat exchange system, the water outlet of the third-stage heat exchange system is connected to the water inlet of the second-stage heat exchange system, and the water outlet of the second-stage heat exchange system The water outlet of the system is connected to the water inlet of the primary heat exchange system, and the water is discharged from the water outlet of the primary heat exchange system. The primary heat exchange system includes a double-helix heat receiver and an atmospheric infrared burner. The atmospheric infrared burner is set Below the double-helix heat receiver, the double-helix heat receiver is cylindrical, and an axial outlet pipe is arranged in the middle of the double-helix heat receiver. A fireplace interlayer is arranged on the inner wall of the double-helix heat receiver cylinder. Coil connection, each double helix coil includes two branch pipes and two spiral coil pipes symmetrical to the axis of the cylinder, one end of the branch pipe is connected to the fireplace interlayer, the other end of the branch pipe is connected to the spiral coil pipe, and the other end of the spiral coil pipe is connected to the The axis outlet pipe is connected.

Further, the secondary heat exchange system is a heat pipe heat exchanger, the heat pipe heat exchanger is provided with a water tank and several heat exchange tubes, the upper part of the heat exchange tube is immersed in the water tank, and the lower part of the heat exchange tube is immersed in the flue gas. A plurality of water pipes are arranged in the water tank and extend to the interlayer of the fireplace of the double-helix heater.

Further, the three-stage heat exchange system is a flue gas heat exchanger.

Further, the four-stage heat exchange system includes an evaporator, a condenser and a compressor, the condenser is connected to the evaporator through a pipeline, the evaporator is connected to the compressor through a pipeline, the compressor is connected to the condenser through a pipeline, and the evaporator The condenser is set near the flue gas outlet of the hot water supply system, the circulating water pump is connected to the water inlet of the condenser through the water pipe, and the water outlet of the condenser is connected to the three-stage heat exchange system.

Further, a "V" shaped fence is provided under the evaporator.

Further, the several branch pipes are vertically arranged in the fireplace interlayer.

Further, the atmospheric pressure infrared burner is provided with an ignition control system.

Further, a chimney is arranged on the upper part of the hot water supply system, and a frequency conversion fan is arranged below the chimney, and the frequency conversion fan is linked with the ignition control system.

Further, the atmospheric pressure infrared burner burns to generate hot flue gas, which is gathered in the double-helix heat receiver for a heat exchange, and the flue gas after the first heat exchange enters the secondary heat exchange system from the double-helix heat receiver for a second heat exchange. Heat exchange, the flue gas after the second heat exchange enters the third heat exchange system from the second heat exchange system for three heat exchanges, and the flue gas after the third heat exchange enters the fourth heat exchange system from the third heat exchange system for four times After heat exchange, the flue gas after four heat exchanges is discharged from the chimney.

The beneficial effects of the present invention are: four times of heat exchange are adopted, the utilization rate of combustion heat is greatly improved, the heat source is effectively divided by using a spiral structure, the heating range is increased, the outlet water temperature is increased, energy is saved, and the heat exchange efficiency is high.

Description of drawings

Figure 1 is a schematic structural diagram of a modular gas-electricity combined water supply system.

In the figure: 1. Atmospheric pressure infrared burner, 2. Ignition control system, 3. Double helix heat receiver, 4. Water outlet of primary heat exchange system, 5. Heat pipe heat exchanger, 6. Compressor, 7. Condenser , 8. Flue gas heat exchanger, 9. Evaporator, 10. Circulating water pump, 11. Chimney, 12. Frequency conversion fan, 13. "V" shaped fence, 14. Heat exchange tube, 15. Water tank, 16. Fireplace interlayer , 17, branch pipe, 18, spiral coil pipe, 19, axial outlet pipe, 20, valve.

detailed description

According to the accompanying drawings, the present invention will be further described. A modular gas-electricity cogeneration hot water supply system with high heat exchange efficiency includes a primary heat exchange system, a secondary heat exchange system, a tertiary heat exchange system and a quaternary heat exchange system. The circulating water pump 10 is connected to the water inlet of the fourth-stage heat exchange system through water pipes, the water outlet of the fourth-stage heat exchange system is connected to the water inlet of the third-stage heat exchange system, the water outlet of the third-stage heat exchange system is connected to the water inlet of the second-stage heat exchange system, and the water outlet of the second-stage heat exchange system is connected to the water inlet of the second-stage heat exchange system. The water outlet of the first-stage heat exchange system is connected to the water inlet of the first-stage heat exchange system, and the water is discharged from the water outlet 4 of the first-stage heat exchange system. The first-stage heat exchange system includes a double-helix heat receiver 3 and an atmospheric pressure infrared burner 1. Atmospheric pressure infrared burner 1 is arranged under the double helix heat receiver 3, the double helix heat receiver 3 is cylindrical, the axial center outlet pipe 19 is arranged in the middle of the double helix heat receiver 3, and the double helix heat receiver 3 is cylindrical The inner wall is provided with a fireplace interlayer 16 in the circumferential direction, and the fireplace interlayer 16 is connected with several double-helix coils. Each double-helix coil includes two branch pipes 17 and two spiral coil pipes 18 symmetrical to the axis of the cylinder. The branch pipes 17 are connected at one end. The fireplace interlayer 16, the other end of the branch pipe 17 is connected to the spiral coil 18, and the other end of the spiral coil 18 is connected to the axial outlet pipe 19. Several branch pipes 17 are vertically arranged in the fireplace interlayer 16, and each spiral coil does not interfere with each other.

Atmospheric pressure infrared burner 1 is combusted at atmospheric pressure and low nitrogen. As a heat source, the combustion temperature is 600°C-800°C, which can reduce the production of nitrogen oxides (mainly nitric oxide and nitrogen dioxide). There are points on the atmospheric pressure infrared burner 1. The fire controller system 2 can automatically control the ignition, turn off the flame and stop the gas, and automatically adjust the gas supply according to the requirements. The heat and flue gas generated by the burner 1 enter the double-helix heater 3 to heat the water in the double-helix coil. It is best to have 1-4 groups of coils, which can effectively divide the fire and expand the heating range, and will not block the flame from burning due to the overcrowding of the double-helix heater cylinder, resulting in flameout.

The secondary heat exchange system is the heat pipe heat exchanger 5. The heat pipe heat exchanger 5 is equipped with a water tank 15 and several heat exchange tubes 14. The upper part of the heat exchange tube 14 is immersed in the water tank 15, and the lower part of the heat exchange tube 14 is immersed in the flue gas. Two water pipes are set inside the water tank 15 and extend to the fireplace interlayer 21 of the spiral heat receiver. The hot smoke enters the heat pipe heat exchanger 5 from the double spiral heat receiver 3, and the hot smoke heats the bottom of the heat exchange tube 14, so that the heat can be transferred to the heat pipe as much as possible. 14 in the sink 15 on the top.

The three-stage heat exchange system is the flue gas heat exchanger 8, and the water pipe in the flue gas heat exchanger 8 is connected to the water tank 15 of the heat pipe heat exchanger 5, and the hot smoke enters the flue gas heat exchanger 8 from the heat pipe heat exchanger 5 , the water in the flue gas heat exchanger 8 absorbs the heat in the flue gas.

The four-stage heat exchange system includes an evaporator 9, a condenser 7 and a compressor 6, the condenser 7 is connected to the evaporator 9 through a pipeline, the evaporator 9 is connected to the compressor 6 through a pipeline, and the compressor 6 is connected to the condenser 7 through a pipeline , the condenser 2, the evaporator 9 and the compressor 6 are connected in sequence to form a complete circuit. The evaporator 9 is set near the flue gas outlet of the hot water supply system to facilitate the exhaust of the flue gas. The circulating water pump 10 is connected to the water inlet of the condenser through a water pipe, and the water outlet of the condenser is connected to the flue gas heat exchanger 8 .

A valve 20 is set between the circulating water pump 10 and the condenser 7. When the valve 20 is opened, the cold water enters the condenser 7 from the circulating water pump 10, and the refrigerant releases the heat energy of the flue gas absorbed in the evaporator 9 in the condenser 7 and the latent heat of vaporization of the refrigerant for heating. The cold water is heated once, and the cold water after the first heating enters the flue gas heat exchanger 8 from the condenser 7 to absorb the heat energy of the flue gas, and performs secondary heating, and the water after the secondary heating enters the heat pipe from the flue gas heat exchanger 8 In the water tank 15 of the heater 5, the bottom of the heat exchange tube 14 is heated by flue gas and the heat is transferred to the water tank 15 at the top of the heat exchange tube 14 for three times of heating. In the fireplace interlayer 16, in the fireplace interlayer 16, it enters the spiral coil 18 through each branch pipe 17, heats four times in the spiral coil 18, and then enters the axial outlet pipe 19 of the double helix heat receiver 3 through the spiral coil 18 And flow out through the water outlet 4, and the water temperature reaches the highest at this moment.

Atmospheric pressure infrared burner 1 burns to produce hot smoke. The heat and hot smoke gather in the double helix heat receiver 3 to heat the water in the spiral coil 18 for a heat exchange. The smoke rises to heat the bottom of the heat exchange tube 14, and the heat exchange The tube 14 transfers heat to the water tank 15 at the top of the heat exchange tube 14, the water in the heated water tank 15 performs secondary heat exchange, and the flue gas with a small amount of heat enters the flue gas heat exchanger 8, and the flue gas heat exchanger 8 The water in the evaporator absorbs a small amount of heat in the flue gas for three heat exchanges, and the flue gas after the three heat exchanges continues to rise into the evaporator 9, and the refrigerant in the evaporator 9 absorbs the heat of the flue gas and the heat generated by the liquefaction of water vapor, And transfer the heat energy to the condenser to heat the cold water, perform four heat exchanges, the flue gas after the four heat exchanges is discharged from the chimney 11, and the frequency conversion fan 12 is installed under the pipe wall of the chimney 11, and the frequency conversion fan 12 is connected with the ignition control system 2 Linkage, the ignition control system 2 adjusts the gas volume according to the combustion situation, and the frequency conversion fan controls the exhaust air volume, exhaust speed and exhaust temperature through the gas volume. The double helix heat receiver 3, the heat pipe heat exchanger 5, the flue gas heat exchanger 8 and the middle 9 of the evaporator are sequentially connected and closed as a flue gas channel. 11 discharge.

The compressor 6 compresses the refrigerant, the refrigerant enters the condenser 7 and encounters cold water, the refrigerant liquefies and releases the heat absorbed in the evaporator to heat the cold water at the same time, the liquid refrigerant enters the evaporator 9 through the pipeline, and the refrigerant vaporizes and absorbs the water exchange system After the heat generated by the liquefaction of medium water vapor and the heat existing in the flue gas, the refrigerant becomes a high-temperature gas and returns to the compressor 6 to continue compression, and then enters the condenser 7 to release heat, and so on.

As the refrigerant in the evaporator 9 vaporizes and absorbs heat, the water vapor near the evaporator liquefies and condenses into water droplets that adhere to the outer wall of the evaporator 9. In order to prevent water droplets from affecting the water exchange system, a condensate collection device is installed below the evaporator 9. To intercept water droplets, the condensed water collecting device is a "V"-shaped fence 13, and there are gaps between the "V"-shaped fences, allowing smoke to pass through without affecting the heat exchange process.

Multiple modules of the hot water supply system provided by the invention are used in combination to provide heating.

Claims (9)

1. Modular gas-electricity hot water supply system, including primary heat exchange system, secondary heat exchange system, third stage heat exchange system and fourth stage heat exchange system. The circulating water pump is connected to the water inlet of the fourth stage heat exchange system through water pipes. The water outlet of the fourth-stage heat exchange system is connected to the water inlet of the third-stage heat exchange system, the water outlet of the third-stage heat exchange system is connected to the water inlet of the second-stage heat exchange system, and the water outlet of the second-stage heat exchange system is connected to the water inlet of the first-stage heat exchange system , the water is discharged from the water outlet of the first-stage heat exchange system, wherein the first-stage heat exchange system includes a double-helix heat receiver and an atmospheric pressure infrared burner, and the atmospheric pressure infrared burner is arranged under the double-helix heat receiver, The double-helix heat receiver is cylindrical, and an axial outlet pipe is arranged in the middle of the double-helix heat receiver. A fireplace interlayer is arranged on the inner wall of the cylinder of the double-helix heat receiver, and the fireplace interlayer is connected with several double-helix coils. Each double-helix The coil pipe includes two branch pipes symmetrical to the axis of the cylinder and two spiral coil pipes, one end of the branch pipe is connected to the fireplace interlayer, the other end of the branch pipe is connected to the spiral coil pipe, and the other end of the spiral coil pipe is connected to the axial water outlet pipe. 2. The modular gas-electricity hot water supply system according to claim 1, characterized in that: the secondary heat exchange system is a heat pipe heat exchanger, and the heat pipe heat exchanger is equipped with a water tank and several heat exchange tubes The upper part of the heat exchange tube is immersed in the water tank, the lower part of the heat exchange tube is immersed in the flue gas, and several water pipes are arranged in the water tank to extend to the fireplace interlayer of the double-helix heat receiver. 3. The modular gas-electricity hot water supply system according to claim 1, characterized in that: the three-stage heat exchange system is a flue gas heat exchanger. 4. The modular gas-electricity hot water supply system according to claim 1, characterized in that: the four-stage heat exchange system includes an evaporator, a condenser and a compressor, and the condenser is connected to the evaporator through a pipeline, The evaporator is connected to the compressor through a pipeline, and the compressor is connected to the condenser through a pipeline. The evaporator is arranged near the flue gas outlet of the hot water supply system. The circulating water pump is connected to the water inlet of the condenser through a water pipe, and the water outlet of the condenser is connected to the Three-stage heat exchange system. 5. The modular gas-electricity hot water supply system according to claim 4, characterized in that: a condensed water collection device is provided under the evaporator. 6. The modular gas-electricity hot water supply system according to claim 1, characterized in that: the several branch pipes are vertically arranged in the fireplace interlayer. 7. The modular gas-electricity combined hot water supply system according to claim 1, characterized in that: the atmospheric pressure infrared burner is provided with an ignition control system. 8. The modular gas-electricity hot water supply system according to claim 7, characterized in that: a chimney is installed on the upper part of the hot water supply system, and a frequency conversion fan is installed below the chimney, and the frequency conversion fan is linked with the ignition control system. 9. The flow direction of the modular gas-electricity hot water supply system according to claim 7, characterized in that: the atmospheric pressure infrared burner burns to generate hot flue gas, and the hot flue gas is gathered in the double-helix heat receiver for a heat exchange, The flue gas after the primary heat exchange enters the secondary heat exchange system from the double-helix heat receiver for secondary heat exchange, and the flue gas after the secondary heat exchange enters the tertiary heat exchange system from the secondary heat exchange system for three heat exchanges. The flue gas after heat exchange enters the four-stage heat exchange system from the three-stage heat exchange system for four heat exchanges, and the flue gas after the four heat exchanges is discharged from the chimney.