High-temperature flue gas waste heat recovery power generation device for annular heating furnace

Abstract

The utility model relates to the technical field of high-temperature flue gas recovery power generation, in particular to an annular heating furnace high-temperature flue gas waste heat recovery power generation device, which collects sundries accumulated at the corner of a pipeline between an annular heating furnace and a desulfurizing tower through a collecting device, reduces the influence of dirt accumulation on the flue gas recovery power generation effect, and improves the power generation efficiency. The dirt discharged by the collecting device is flushed away through the flushing device, the distance between the annular heating furnace and the desulfurizing tower is reduced, the length of a normal connecting pipeline between the annular heating furnace and the desulfurizing tower is further shortened, heat loss of flue gas in the transmission process is reduced, and the energy consumption of the flue gas is reduced. Liquid drops brought out of gas output by the desulfurizing tower are collected through the water collecting device, and the normal working effect that the liquid drops enter the waste heat boiler to absorb heat and evaporate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature flue gas recovery power generation, in particular to a high-temperature flue gas waste heat recovery power generation device for a rotary hearth furnace. Background Technique

[0002] A rotary hearth furnace is a continuous reheating furnace in which billets are heated while moving on a rotary hearth. High-temperature flue gas usually contains various pollutants, such as sulfides, nitrogen oxides, etc. These pollutants may cause corrosion and blockage to equipment and systems during the power generation process. Therefore, effective denitrification, desulfurization and other processes need to be adopted during the flue gas pretreatment process to reduce the pollutant concentration in the flue gas. The waste heat boiler is one of the core equipment of the waste heat power generation system, and its main function is to use the heat in the high-temperature flue gas to heat water and generate steam.

[0003] In the prior art, the Chinese utility model patent with the application number CN202023324007.9 relates to a high-temperature flue gas waste heat recovery power generation device for a rotary hearth furnace, including a first flue gas inlet, a desulfurization tower, a water inlet pipe, a flue gas power generation device, an intake valve, a heating pipe, a paddle, etc., which can improve the utilization rate of the waste heat in the flue gas without polluting the water source and enhance the economic benefits.

[0004] However, in actual use of the above device, dirt accumulation and blockage will occur in the pipe bending area, which needs to be cleaned regularly. During the continuous recovery process, the air flow rate will decrease, affecting the waste heat recovery power generation effect of the equipment. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a high-temperature flue gas waste heat recovery power generation device for a rotary hearth furnace. The collecting device collects the sundries accumulated at the pipe bend between the rotary hearth furnace and the desulfurization tower, reduces the influence of dirt accumulation on the waste heat recovery power generation effect of the flue gas, and can be quickly discharged without shutdown maintenance. The flushing device flushes away the dirt discharged by the collecting device, reduces the distance between the rotary hearth furnace and the desulfurization tower, thereby shortening the length of the normal connecting pipe between the rotary hearth furnace and the desulfurization tower, and reducing the heat loss of the flue gas during the transmission process. The water collecting device collects the liquid droplets carried out in the gas output by the desulfurization tower, reduces the influence of the liquid droplets entering the waste heat boiler and absorbing heat and evaporating on the normal working effect, and improves the practicability of the device.

[0006] To achieve the above object, a high-temperature flue gas waste heat recovery power generation device for a ring heating furnace of the present utility model includes a ring heating furnace, a desulfurization tower, and a waste heat boiler, which are sequentially connected by pipelines between the ring heating furnace, the desulfurization tower, and the waste heat boiler; it includes a collection structure, a flushing device, and a water collection device. The collection device is installed on the ring heating furnace, the flushing device is installed between the ring heating furnace and the desulfurization tower, and the water collection device is installed on the desulfurization tower; the collection device collects the sundries accumulated at the pipeline turning point between the ring heating furnace and the desulfurization tower, reduces the impact of dirt accumulation on the flue gas recovery power generation effect, and can be quickly discharged without shutdown maintenance. The flushing device flushes away the dirt discharged by the collection device, reduces the distance between the ring heating furnace and the desulfurization tower, thereby shortening the length of the normal connection pipeline between the ring heating furnace and the desulfurization tower, and reducing the heat loss of the flue gas during transmission. The water collection device collects the droplets carried by the gas output from the desulfurization tower, reducing the normal working effect affected by the droplets entering the waste heat boiler and absorbing heat for evaporation.

[0007] Preferably, the collection structure includes a first flue gas pipeline, a first three-way pipe, and a plate solenoid valve. A first flue gas pipeline is connected to the top surface of the ring heating furnace. A first three-way pipe is installed at the output end of the first flue gas pipeline. One set of output ends of the first three-way pipe communicates with the lower part of the desulfurization tower. Another set of output ends of the first three-way pipe is connected to a pipeline, and a plate solenoid valve is installed at the bottom of the pipeline; the flue gas generated in the ring heating furnace is transported to the inside of the desulfurization tower through the cooperation of the first flue gas pipeline and the first three-way pipe. Part of the solid dirt in the flue gas is collected through the pipeline at the lower part of the first three-way pipe, reducing the impact of the accumulation of solid dirt inside the first flue gas pipeline on the air circulation inside the first flue gas pipeline. By controlling the opening and closing of the plate solenoid valve, the dirt collected in the pipeline at the lower part of the first three-way pipe is quickly discharged, reducing the labor intensity of the operator during the pipeline cleaning process.

[0008] Preferably, the flushing device includes a dirt guiding groove, a water pump, a water tank, and a spray head. A dirt guiding groove is arranged on the ground between the ring heating furnace and the desulfurization tower, and a water tank is arranged under the front side of the dirt guiding groove. A water pump is installed on the upper side of the water tank. The input end of the water pump communicates with the inside of the water tank. Multiple groups of spray heads are installed on the front end surface of the dirt guiding groove. The output end of the water pump is connected to the multiple groups of spray heads. The output end of the plate solenoid valve is located above the dirt guiding groove; the dirt guiding groove collects the dirt discharged by the plate solenoid valve. The water pump is turned on to pump out the liquid in the water tank and spray it out by the multiple groups of spray heads, so as to cooperate with the dirt guiding groove to output the dirt. By setting the dirt guiding groove, the dirt is flushed out through the water, reducing the installation distance between the ring heating furnace and the desulfurization tower, thereby reducing the length of the first flue gas pipeline and reducing the heat loss of the flue gas during the flow in the first flue gas pipeline.

[0009] Preferably, it further includes a water guide slope, a sewage collection pool and filter plates. A water guide slope is provided at the bottom of the sewage guide trough, a sewage collection pool is provided at the rear of the sewage guide trough, and multiple groups of filter plates are installed inside the sewage collection pool; the sewage and wastewater are discharged into the sewage collection pool through the sewage guide trough for collection, and at the same time, the sewage is screened and collected through the filter plates to facilitate the discharge and treatment of the wastewater. The water guide slope is provided at the lower part of the sewage guide trough to reduce the residue of sewage in the sewage guide trough.

[0010] Preferably, the water collection device includes a second flue gas pipeline, a second three-way pipe, an electromagnetic valve and a liquid guide pipe. The second flue gas pipeline is connected to the top end surface of the desulfurization tower. The output end of the second flue gas pipeline is equipped with a second three-way pipe. One group of output ends of the second three-way pipe is connected to the lower input end of the waste heat boiler. An electromagnetic valve is installed on the other group of output ends of the second three-way pipe. The output end of the electromagnetic valve is communicated with the inside of the water tank through a pipeline; the high-temperature liquid that has been purified in the desulfurization tower is poured into the waste heat boiler through the second flue gas pipeline, and part of the purified liquid mixed in it is introduced into the water tank through the liquid guide pipe for use by the flushing device.

[0011] Preferably, it further includes a sealing cover and an exhaust valve. An inspection opening is provided at the upper part of the water tank, a sealing cover is installed on the inspection opening, and an exhaust valve is installed on the sealing cover; the inspection opening facilitates the cleaning and maintenance inside the water tank. The sealing cover seals the inside of the water tank to prevent waste gas from overflowing. Before maintenance, close the electromagnetic valve and open the exhaust valve to discharge the high-pressure waste gas in the water tank in advance, so as to facilitate the operators to carry out cleaning and maintenance.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The debris accumulated at the pipe bend between the annular heating furnace and the desulfurization tower is collected by the collection device, reducing the impact of debris accumulation on the flue gas recovery power generation effect. At the same time, it can be quickly discharged without shutdown maintenance. The debris discharged by the collection device is washed away by the flushing device, reducing the distance between the annular heating furnace and the desulfurization tower, thereby shortening the length of the normal connecting pipe between the annular heating furnace and the desulfurization tower, and reducing the heat loss of the flue gas during transmission. The water collection device collects the liquid droplets carried out in the gas output from the desulfurization tower, reducing the influence of the liquid droplets entering the waste heat boiler and absorbing heat and evaporating on the normal working effect, and improving the practicability of the device. Description of the Drawings

[0013] Figure 1 is the first axonometric structure schematic diagram of the present utility model;

[0014] Figure 2 is the first sectional structure schematic diagram of the present utility model;

[0015] Figure 3 is the second sectional structure schematic diagram of the present utility model;

[0016] Figure 4It is the second axonometric structure schematic diagram of the utility model;

[0017] Figure 5 It is the partial enlarged structure schematic diagram of the utility model;

[0018] Labels in the attached drawings: 1. Ring-shaped heating furnace; 2. Desulfurization tower; 3. Waste heat boiler; 4. First flue gas pipeline; 5. First three-way pipe; 6. Plate type solenoid valve; 7. Dirt guide groove; 8. Water pump; 9. Water tank; 10. Sprinkler head; 11. Water guide slope; 12. Sewage collection pool; 13. Filter plate; 14. Second flue gas pipeline; 15. Second three-way pipe; 16. Solenoid valve; 17. Liquid guide pipe; 18. Sealing cover; 19. Exhaust valve. Specific embodiments

[0019] To facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant attached drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0020] Embodiment:

[0021] As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 shown, the flushing device is installed on the lower side of the collection device, and the water collection device is connected to the flushing device;

[0022] First, part of the solid dirt in the flue gas is collected through the pipeline at the lower part of the first three-way pipe 5, reducing the influence of the accumulation of solid dirt inside the first flue gas pipeline 4 on the air circulation inside the first flue gas pipeline 4. The dirt collected in the pipeline at the lower part of the first three-way pipe 5 is quickly discharged by controlling the opening and closing of the plate type solenoid valve 6. The water pump 8 is turned on to pump out the liquid in the water tank 9 and spray it out through multiple groups of sprinkler heads 10, so as to cooperate with the dirt guide groove 7 to output the dirt. By setting the dirt guide groove 7, the dirt can be flushed out through the water and led into the sewage collection pool 12;

[0023] The collection structure includes the first flue gas pipeline 4, the first three-way pipe 5 and the plate type solenoid valve 6. The first flue gas pipeline 4 is connected to the top end surface of the ring-shaped heating furnace 1. The output end of the first flue gas pipeline 4 is provided with the first three-way pipe 5. One group of output ends of the first three-way pipe 5 is communicated with the lower part of the desulfurization tower 2, and the other group of output ends of the first three-way pipe 5 is connected with a pipeline, and the plate type solenoid valve 6 is installed at the bottom of the pipeline;

[0024] The flushing device includes a dirt guiding trough 7, a water pump 8, a water tank 9 and a spray head 10. A dirt guiding trough 7 is arranged on the ground between the annular heating furnace 1 and the desulfurization tower 2, and a water tank 9 is arranged under the front side of the dirt guiding trough 7. A water pump 8 is installed on the upper side of the water tank 9. The input end of the water pump 8 is communicated with the inside of the water tank 9. Multiple groups of spray heads 10 are installed on the front end face of the dirt guiding trough 7. The output end of the water pump 8 is connected with the multiple groups of spray heads 10. The output end of the plate type electromagnetic valve 6 is located on the upper side of the dirt guiding trough 7;

[0025] It further includes a water guiding slope 11, a sewage collecting pool 12 and a filter plate 13. A water guiding slope 11 is arranged at the bottom of the dirt guiding trough 7, a sewage collecting pool 12 is arranged at the rear part of the dirt guiding trough 7, and multiple groups of filter plates 13 are installed inside the sewage collecting pool 12;

[0026] The water collecting device includes a second flue gas pipeline 14, a second three-way pipe 15, an electromagnetic valve 16 and a liquid guiding pipe 17. A second flue gas pipeline 14 is connected to the top end face of the desulfurization tower 2. A second three-way pipe 15 is installed at the output end of the second flue gas pipeline 14. One group of output ends of the second three-way pipe 15 is connected to the lower input end of the waste heat boiler 3. An electromagnetic valve 16 is installed on the other group of output ends of the second three-way pipe 15. The output end of the electromagnetic valve 16 is communicated with the inside of the water tank 9 through a pipeline;

[0027] It further includes a sealing cover 18 and an exhaust valve 19. An inspection opening is arranged at the upper part of the water tank 9. A sealing cover 18 is installed on the inspection opening, and an exhaust valve 19 is installed on the sealing cover 18;

[0028] The collecting device is used to collect the sundries accumulated at the pipe bends between the annular heating furnace 1 and the desulfurization tower 2, reduce the influence of dirt accumulation on the flue gas recovery power generation effect, and can be quickly discharged without shutdown maintenance. The flushing device flushes away the dirt discharged by the collecting device, reduces the distance between the annular heating furnace 1 and the desulfurization tower 2, and further shortens the length of the normal connecting pipe between the annular heating furnace 1 and the desulfurization tower 2, reducing the heat loss of the flue gas during transmission. The water collecting device collects the liquid droplets carried by the gas output from the desulfurization tower 2, reducing the influence of the liquid droplets entering the waste heat boiler 3 and absorbing heat and evaporating on the normal working effect.

[0029] The plate type electromagnetic valve 6, the water pump 8, the exhaust valve 19 and the electromagnetic valve 16 of the present utility model are purchased on the market. Those skilled in the industry only need to install and operate them according to the attached operation manuals, without the need for creative labor from those skilled in the art.

[0030] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A ring-shaped heating furnace high-temperature flue gas waste heat recovery power generation device, comprising a ring-shaped heating furnace (1), a desulfurization tower (2) and a waste heat boiler (3), wherein the ring-shaped heating furnace (1), the desulfurization tower (2) and the waste heat boiler (3) are sequentially connected by pipelines; characterized in that: The invention comprises a collecting structure, a flushing device and a water collecting device, wherein the collecting device is installed on the annular heating furnace (1), the flushing device is installed between the annular heating furnace (1) and the desulfurization tower (2), and the water collecting device is installed on the desulfurization tower (2); the collecting structure comprises a first flue gas pipeline (4), a first three-way pipe (5) and a plate-type electromagnetic valve (6); the top surface of the annular heating furnace (1) is connected to the first flue gas pipeline (4), the output end of the first flue gas pipeline (4) is installed with the first three-way pipe (5), one set of output ends of the first three-way pipe (5) is connected to the lower part of the desulfurization tower (2), the other set of output ends of the first three-way pipe (5) is connected to a pipeline, and the bottom of the pipeline is installed with a plate-type electromagnetic valve (6); The flushing device comprises a sewage trough (7), a water pump (8), a water tank (9) and a nozzle (10). The sewage trough (7) is arranged on the ground between the annular heating furnace (1) and the desulfurization tower (2), and the water tank (9) is arranged under the front side of the sewage trough (7). The water pump (8) is installed on the upper side of the water tank (9). The input end of the water pump (8) is connected to the inside of the water tank (9). A plurality of nozzles (10) are installed on the front end surface of the sewage trough (7). The output end of the water pump (8) is connected to the plurality of nozzles (10). The output end of the plate-type solenoid valve (6) is located on the upper side of the sewage trough (7).

2. The annular heating furnace high temperature flue gas waste heat recovery power generation device according to claim 1, characterized in that: It also comprises a water guide slope (11), a sewage collecting tank (12) and a filter plate (13); the bottom of the sewage guide trough (7) is provided with a water guide slope (11); the rear of the sewage guide trough (7) is provided with a sewage collecting tank (12); and a plurality of groups of filter plates (13) are installed inside the sewage collecting tank (12).

3. The annular heating furnace high temperature flue gas waste heat recovery power generation device according to claim 1, characterized in that: The water collecting device comprises a second flue gas pipeline (14), a second three-way pipe (15), a solenoid valve (16) and a liquid guide pipe (17); the second flue gas pipeline (14) is connected to the top surface of the desulfurization tower (2); the second three-way pipe (15) is installed on the output end of the second flue gas pipeline (14); one set of output ends of the second three-way pipe (15) is connected to the lower input end of the waste heat boiler (3); the other set of output ends of the second three-way pipe (15) is installed on the solenoid valve (16); the output end of the solenoid valve (16) is connected to the inside of the water tank (9) through a pipeline.

4. The annular heating furnace high temperature flue gas waste heat recovery power generation device according to claim 1, characterized in that: It also includes a sealing cover (18) and an exhaust valve (19). An inspection port is provided on the upper portion of the water tank (9), the sealing cover (18) is mounted on the inspection port, and the exhaust valve (19) is mounted on the sealing cover (18).

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