CN203336984U - Ceramic roller kiln waste heat energy and electric energy integrated utilization system - Google Patents

Abstract

The utility model discloses an integrated utilization system of waste heat and electric energy of a ceramic roller kiln, which comprises a waste heat collection device, a heat exchange device, a hot water supply system, heat transfer oil flows in from a low-temperature oil pipeline, flows out from a high-temperature oil pipeline, and passes through a heat collecting plate. All the heat-conducting oil flowing out is collected in the pipeline, and then flows into the oil tank together, and the output oil pipelines extending from the bottom of the oil tank are respectively embedded in three water tanks in parallel. Because the fuel tank and water tank of this system are equipped with heating devices respectively, and each water tank is connected with multiple water tanks through a water pipe with a two-way switch, sharing hot water resources, and the independence of each water tank can also be realized by using the switch, so that When the number of personnel is relatively small, only one or two of the water tanks are used to save resources, and the system has the following advantages: safe and stable work, continuous heating, energy saving, low operating costs, less pollution, and less investment in equipment.

Description

A ceramic roller kiln waste heat and electric energy integrated utilization system

technical field

The utility model relates to a device for utilizing the waste heat energy of a ceramic roller kiln. the

Background technique

According to the current development of the ceramic industry, we know that the waste heat of the ceramic roller kiln is not fully utilized. Most of the kilns have already used the waste heat flue gas into the drying kiln as a drying heat source, and most of the heat in the product has not been used. It is directly discharged into the atmosphere for utilization, and a small part can further utilize this waste heat. The method is generally to directly conduct heat exchange with water to collect waste heat, but the effect is not ideal. This not only wastes energy, but also affects the environment and aggravates the greenhouse effect. the

Domestically disclosed some waste heat reuse technologies, such as:

1. [Name] A ceramic roller kiln waste heat utilization device, [Application No.] CN201110281814.3, [Publication No.] CN201110281814.3 patent literature discloses a ceramic roller kiln waste heat utilization device, which includes multiple Two water tanks are arranged side by side on the kiln roof of the slow-cooling rear section of the kiln and connected in sequence through pipes, and a water inlet and a water outlet are respectively opened on the first and last two water tanks, and the water inlet and water outlet are respectively set in the water tanks. top and side bottom. After adopting the above scheme, the device utilizes the principle of heat exchange and is installed on the roof of the kiln after slow cooling, replacing the original kiln roof ceiling brick structure, which saves materials and utilizes waste heat. Generally, one kiln is installed with one After the water tank is installed, it can meet the daily hot water needs of about 3,000 people in the whole factory. It is especially suitable for ceramic factories in cold northern regions. the

2. [Name] Gypsum rotary kiln with waste heat utilization device, [Patent No.] CN201110263847.5, [Publication No.] CN102261854A, gypsum rotary kiln with waste heat utilization device includes gypsum rotary kiln, gypsum rotary kiln mainly consists of kiln, rotary It is composed of boiler, flue gas dedusting room and chimney. It also has a waste heat utilization device. The waste heat utilization device is composed of a group of flue gas waste heat pipes; The gas inlets are respectively communicated with the combustion heating chamber of the kiln, and the flue gas outlets are respectively communicated with the flue gas dedusting chamber through the flue gas channel. The flue gas waste heat in the flue gas waste heat pipe can be reused by heating the gypsum powder in the rotary pot through the pipe wall. the

3. [Name] Waste heat boiler at the end of cement kiln, [Application No.] CN201010206216.5, and [Publication No.] CN101949555A patent literature discloses a waste heat boiler at the end of a cement kiln. The waste heat boiler at the end of a cement kiln includes H-shaped fins Finned tube, the H-shaped finned tube includes a heat exchange tube and a plurality of fins, and the plurality of fins are arranged on the heat exchange tube at intervals along the length direction of the heat exchange tube, and each of the plurality of fins is parallel to the heat exchange tube. In the cross-section of the heat pipe, each of the plurality of fins is provided with a first notch with an upward opening direction and a second notch with a downward opening direction, the first notch is arranged on the upper half circumference of the heat exchange tube and the first notch The heat exchange tube is exposed at the bottom, the second notch is arranged on the lower half circumference of the heat exchange tube and the heat exchange tube is exposed at the bottom of the second notch. The waste heat boiler at the end of the cement kiln adopts H-shaped finned tubes to form a heat exchange device, which increases the heat exchange area per unit volume, thereby saving a large amount of steel and reducing the project cost. In addition, the waste heat boiler at the end of the cement kiln can effectively solve the problem of dust accumulation on the H-shaped finned tubes. the

The three devices disclosed above all involve improving the waste heat recovery system of the kiln, so that the benefits of waste heat conversion can be improved, but the efficiency of these devices using waste heat is low. Also, these devices can work normally when the kiln is working normally. However, if the waste heat is insufficient, the equipment operating on the waste heat will not be able to work smoothly and normally, resulting in unstable work. For example, it is difficult for the first device to ensure sufficient heat supply during the off-season of production, so that the hot water system cannot operate normally. Due to the instability of the waste heat emitted by the ceramic roller kiln, it is difficult to recover the waste heat, so the general waste heat recovery equipment needs to be improved a lot, resulting in the current two or three devices not being applied to the waste heat recovery system of the ceramic roller kiln. the

Therefore, the ceramic roller kiln needs a device that can make full use of waste heat. As this system, it can first ensure that the heat absorption efficiency is relatively high, and secondly, it can work normally when the waste heat is unstable. the

Contents of the invention

The utility model provides an integrated utilization system of waste heat and electric energy of a ceramic roller kiln. The system combines waste heat and electric energy to provide hot water for staff dormitories, and solves the problems of low utilization efficiency of waste heat of a ceramic roller kiln and unstable supply of hot water. . the

The technical solution of the utility model is: the ceramic roller kiln waste heat and electric energy integrated utilization system includes a waste heat collection device, a heat exchange device, and a hot water supply system. The heat plate is placed in the kiln after slow cooling, the heat transfer oil flows in from the low temperature oil pipeline and flows out from the high temperature oil pipeline, all the heat transfer oil flowing out after passing through the heat collecting plate is collected in the pipeline, and then flows into the oil tank together, extending from the bottom of the oil tank The output oil pipelines are respectively embedded in three water tanks in a parallel manner, and the output oil pipelines circle around in the cavity and then extend against the incoming direction to connect with the return oil pipelines respectively; the three water tanks are connected to each other through water pipes, The inner walls of all water tanks and oil tanks are welded with electric heating rods, and the power lines from the power supply end of the water tank and the power supply end of the fuel tank are respectively connected to the power inlets on the electric heating rods; the cold water pipes are connected to the three water tanks in parallel, along the The outflow direction of the water is connected successively on the pipeline with a one-way valve, a two-way valve and a water temperature gauge, and the water tap is installed at the end of the pipeline. the

One-way valves are installed on the pipelines of the low-temperature oil pipeline and the high-temperature oil pipeline. the

The heat collecting plate adopts a plate heat exchanger. the

The plate heat exchanger in this system is an important device for exhaust energy recovery and high-temperature flue gas waste heat recovery in large-scale air-conditioning systems. Here we use its function of high-temperature flue gas waste heat recovery. The heat transfer device of this system is heat transfer oil, instead of letting water pass directly through the heat collecting plate, because compared with water, heat transfer oil has several advantages: first, it has a high initial boiling point, which can ensure that it can be used in liquid phase mode, and the operation Low pressure, good thermal stability, long service life in the operating temperature range. Second, the heat transfer oil has a high flash point, generally above 185%, to ensure safe use. The third is low viscosity at room temperature and good pumping performance. Finally, the thermal conductivity and specific heat capacity are high, the heat transfer effect is good, the acid value is low, no corrosion to equipment and systems, good oxidation resistance, reasonable system design does not need to be protected by nitrogen, and it is easy to use. the

The oil pipe and oil tank of the system are wrapped with thermal insulation cotton, which can minimize heat loss, make the heat transfer oil in the oil tank the main body of heat storage, realize the energy storage function of the system, and thus realize 24-hour uninterrupted hot water supply. the

The fuel tanks and water tanks of this system are equipped with heating devices respectively, and each water tank realizes intercommunication between multiple water tanks and sharing hot water resources through a water pipe with a two-way switch. When it is relatively small, only one or two of the water tanks are used to save resources, and the system has the following advantages: safe and stable work, continuous heating, energy saving, low operating costs, less pollution, and less investment in equipment. the

Description of drawings

Fig. 1 is the structural representation of the utility model. the

In the figure: 1-Slow cooling rear section kiln, 2-Heat collector plate, 3-One-way valve, 4-Two-way valve, 5-Oil tank power terminal, 6-Oil tank, 7-Water tank power terminal, 8-Faucet, 9 -water temperature gauge, 10-cold water pipeline, 11-return oil pipeline, 12-output oil pipeline, 13-high temperature oil pipeline, 14-low temperature oil pipeline, 15-water tank. the

Detailed ways

The utility model will be further described below according to the accompanying drawings and in conjunction with specific embodiments. the

As shown in Figure 1, the heat transfer oil enters the heat collecting plate 2 from the low-temperature oil pipeline 14, and flows out from the high-temperature oil pipeline 13 after obtaining energy. Perform heat exchange. In order to realize the stability of heat conduction, the heat transfer oil in the low-temperature oil pipeline 14 and the high-temperature oil pipeline 13 conduits are not connected to the heat-transfer oil in the oil tank, and heat exchange is performed through the conduits. the

The low-temperature oil pipeline 14 and the high-temperature oil pipeline 13 are provided with a one-way valve 3 and a two-way valve 4. The two-way valve 4 is set for convenient maintenance. When any heat collector breaks down, the heat transfer oil in the pipe can be cut off. Prerequisites are provided for maintenance, and the setting of the single valve 3 is to prevent the backflow of the heat transfer oil from the low-temperature oil pipeline 14 to the high-temperature oil pipeline 13, so as to prevent pipe bursting. the

The return oil pipeline 11 drawn from the oil tank 6 and the output oil pipeline 12 flow to the three water tanks 15 in parallel, and circle around in the cavity so that they can fully exchange heat with the water in the water tank 15 and then reverse The incoming direction is extended to connect with the return oil pipeline respectively, so as to transfer the heat in the oil tank to the water. the

The cold water flowing in from the cold water pipe 10 is poured into the water tank to exchange heat with the heat transfer oil, and then flows out from the faucet through the water temperature gauge to provide domestic hot water to the factory employees. The water temperature gauge 9 is set to remind the hot water users of the current water temperature to avoid scalding . the

If the production time is short or the weather is relatively cold and the water temperature is not enough, the fuel tank has a fuel tank power supply terminal 5, which can also realize heating by utilizing electric energy for auxiliary heating. Since the fuel tank is fully enclosed and insulated, the electrical energy used at this time will be more efficiently converted into heat energy, and an energy conversion efficiency of more than 80% can be achieved. the

If the production time is short or the weather is relatively cold and the water temperature is not enough and there are few people, you can tighten the bidirectional switch connected to the 15 water pipes of the water tank, so that the water in each or every two water tanks is independent, and the power supply terminal 7 of the water tank in any water tank is provided. Connected to the power supply, the auxiliary heating of electric energy can also be realized. In this way, the situation that the water in all the water tanks is heated but cannot be used up can be avoided, and energy can be saved to the greatest extent. the

The plate heat collector used in the heat collecting plate is composed of two parts, the vacuum liquid-filled head and the core body. It is formed by overlapping with several plate-fin channels at intervals. There are partitions on the upper and lower sides of the vacuum liquid-filled channel, seals on both sides, and fins can be arranged in the channel. Each plate-fin channel is divided into two juxtaposed heat medium channels and cold medium channels by a strip. After assembly, the whole is arranged horizontally or vertically. Such setting can realize the maximum heat collection efficiency of the heat collection plate, so that the waste heat can be fully utilized. the

The waste heat utilization rate of the system is high, easy to store, easy to release, and easy to install. According to the area of the waste heat collector plate and the working hours and workload of the ceramic roller kiln on that day, the heat energy stored on the day can be converted to make full use of the stored heat source. Heat transfer oil has a high boiling point and a large specific heat, which is easy to conduct heat. The system does not produce concentrated water during work before exchanging heat with water, so the process of drainage is not required in the first half, so that the utilization rate of water reaches a high level. the

A lot of practice has proved that a ceramic roller kiln waste heat and electric energy integrated utilization system can indeed reduce the cost of ceramic production enterprises and bring great convenience to employees. After using the utility model, the waste heat discharged by the production of enterprises has been recycled and reused , reducing the pollution to the environment, without using expensive and polluting traditional energy sources in the hot water system. Electric energy has only become a kind of auxiliary energy, and when using electric energy, the ratio of electricity to heat is higher than that of general household water heaters. the

According to calculations, the system can meet the daily hot water demand of an enterprise with 2,000-3,500 employees. Generally speaking, the per capita daily hot water consumption of urban residents in my country is 60-80 liters (60°C). About one kilowatt-hour of electricity is needed, and based on the calculation of 3,000 people, 3,000 kilowatt-hours of electricity can be saved every day. Converted into electricity, it can save 3,000 yuan per day. Calculated by working 28 days per month, 1,008,000 yuan can be saved every year. the

From the above analysis, it can be drawn that the utility model has considerable benefits from the economic benefit analysis and social benefit analysis, and the technical parameters are compared as follows:

Table 1 Comparison of technical parameters between the utility model and the traditional electric boiler

Based on the analysis of the data in the table above, whether it is in terms of corporate economic benefits or social public benefits, the ceramic roller kiln waste heat and electric energy integrated utilization system has advantages over the traditional electric boiler hot water supply system. the

Claims (3)

1. A ceramic roller kiln waste heat and electric energy integrated utilization system, including a waste heat collection device, a heat exchange device, and a hot water supply system, characterized in that: the oil pipe of the waste heat collection device is attached to the surface of the heat collecting plate (2) , the heat collector plate (2) is placed in the kiln (1) in the slow cooling stage, the heat conduction oil flows in from the low temperature oil pipeline (14) and flows out from the high temperature oil pipeline (13), and all the heat conduction oil that flows out after passing through the heat collector plate (2) The oil is collected in the pipeline, and then flows into the oil tank (6) together, and the output oil pipelines (12) extending from the bottom of the oil tank (6) are respectively embedded in three water tanks (15) in parallel, and the output oil pipelines (12) Go around in the cavity and extend against the incoming direction to connect with the return oil pipeline (11) respectively; The inner walls are all welded with electric heating rods, and the power lines from the water tank power supply end (7) and the fuel tank power supply end (5) are respectively connected with the power inlets on the electric heating rods; the cold water pipes (10) are connected in parallel with the three water tanks ( 15) connection, one-way valve (3), two-way valve (4) and water temperature gauge (9) are connected successively on the pipeline along the water flow outflow direction of the water tank, and the water tap (8) is installed at the end of the pipeline. the 2. The ceramic roller kiln waste heat and electric energy integrated utilization system according to claim 1, characterized in that: the low-temperature oil pipeline (14) and the high-temperature oil pipeline (13) are equipped with one-way valves (3 ). the 3. The ceramic roller kiln waste heat and electric energy integrated utilization system according to claim 1, characterized in that: the heat collecting plate (2) adopts a plate heat exchanger. the

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