Quenching control system

Abstract

The utility model provides a quenching control system, and belongs to the technical field of hazardous waste incineration flue gas treatment, the quenching control system comprises a quenching tower, a liquid supply device, an air supply device and a spray gun assembly, the liquid supply device supplies cooling liquid to the spray gun assembly, and the air supply device supplies compressed air to the spray gun assembly; the spray gun assembly combines the cooling liquid with compressed air to provide atomized cooling liquid for the quench tower; a backflow loop with a back pressure valve is arranged in the liquid supply device, and the liquid supply flow in the liquid supply loop is adjusted. The liquid supply device is simple in structural principle, the amount of backflow water in the liquid supply device is controllable, it is guaranteed that the liquid supply flow in a liquid supply loop is stable, the liquid supply pressure on an outlet pipeline of the quenching water pump is stable, and the service life of the quenching water pump is longer.

Description

Technical Field

[0001] The present application relates to the technical field of hazardous waste incineration flue gas treatment, and specifically to a quenching control system. Background Art

[0002] During processes such as metallurgy and the incineration of garbage and hazardous waste, high-temperature flue gas is generated in furnaces and incinerators. Before subsequent treatments such as dry dust removal, this high-temperature flue gas needs to be cooled. However, during the cooling process, this high-temperature flue gas is prone to producing dioxins, which can pollute the environment. Therefore, rapid cooling of the high-temperature flue gas is necessary to prevent dioxin formation during the cooling process.

[0003] However, the traditional method of using cooling water to cool flue gas often suffers from problems such as large fluctuations in the quenching atomization water volume, unstable spray gun operation, poor atomization, and large fluctuations in air usage leading to compressed air waste. The design of current high-temperature flue gas quenching equipment and its effectiveness in quenching high-temperature flue gas still need to be improved. Utility Model Content

[0004] Therefore, in order to overcome the shortcomings of the above-mentioned prior art, the present invention provides a quenching control system to solve the problems of large fluctuations in quenching water spray volume, large fluctuations in air usage, poor atomization effect, and large fluctuations in the flue gas temperature after cooling.

[0005] In order to achieve the above object, the present invention provides the following technical solution: a quenching control system, characterized in that it includes:

[0006] The quench tower is used to cool the high-temperature flue gas using atomized coolant;

[0007] a liquid supply device, disposed outside the quenching tower, for supplying cooling liquid to the top of the quenching tower;

[0008] an air supply device, disposed outside the quenching tower, for supplying compressed air to the top of the quenching tower;

[0009] A spray gun assembly is provided at the top of the quenching tower and is used to provide atomized coolant to the quenching tower; the outlet end of the atomizing compressed air distribution ring pipe of the liquid supply device is connected to the spray gun assembly, and the outlet end of the liquid supply device is connected to the spray gun assembly;

[0010] Wherein, the liquid supply device includes: a quenching water tank, a liquid supply circuit and a return circuit;

[0011] The liquid supply circuit is used to supply the quenching water in the quenching water tank to the quenching tower;

[0012] The reflux circuit is arranged behind the quenching water pump in the liquid supply circuit; a back pressure valve is provided on the reflux circuit, and the back pressure valve is used to control the amount of reflux water; the reflux circuit is used to adjust the liquid supply flow in the liquid supply circuit to ensure that the liquid supply flow in the liquid supply circuit is stable.

[0013] Specifically, a quenching water pump, a remote pressure gauge, a first flow meter and a first regulating valve are provided on the pipeline of the liquid supply circuit. The quenching water pump draws quenching water from the quenching water tank into the pipeline of the liquid supply circuit and transports it to the top of the quenching tower. The remote pressure gauge and the first flow meter are respectively used to measure the liquid supply pressure and liquid supply flow in the pipeline of the liquid supply circuit. The first regulating valve is used to control the liquid supply flow in the pipeline of the liquid supply circuit.

[0014] Specifically, the liquid supply circuit includes two parallel quenching water pumps, one of which is used and the other is reserved.

[0015] Specifically, the quenching water pump, remote pressure gauge, first flow meter, first regulating valve, and back pressure valve in the liquid supply device are skid-mounted as a quenching pump station module.

[0016] Specifically, the pipeline of the air supply circuit of the air supply device includes: a compressed air filter pressure reducing valve, a second flow meter, a second regulating valve and an atomizing compressed air distribution ring pipe; the compressed air filter pressure reducing valve is used to reduce the pressure of the compressed air and filter impurities and particulate matter in the compressed air; the second flow meter and the second regulating valve are respectively used to measure and control the compressed air flow in the pipeline of the air supply circuit; the atomizing compressed air distribution ring pipe is used to temporarily store the compressed air and distribute the compressed air to the spray gun assembly.

[0017] Specifically, the spray gun assembly includes two spray guns, which are obliquely inserted and arranged on both sides above the quenching tower; the end of the liquid supply device is divided into two branches, and needle regulating valves and pressure gauges are provided on the two branches. The needle regulating valve is used to manually adjust the cooling water flow on the branch, and the pressure gauge is used to measure the cooling water pressure on the branch; the two branches are respectively connected to the two spray guns; the atomizing compressed air distribution ring pipe of the liquid supply device is provided with two outlet ends, and the two outlet ends are respectively connected to the two spray guns.

[0018] Specifically, the second flowmeter is electrically connected to the second regulating valve and the first flowmeter. The second flowmeter is electrically connected to the first flowmeter for controlling the compressed air flow measured by the second flowmeter using the water supply flow measured by the first flowmeter. The second flowmeter is electrically connected to the second regulating valve for controlling the opening of the second regulating valve using the compressed air flow measured by the second flowmeter.

[0019] Specifically, the needle regulating valve and the pressure gauge in the liquid supply device, and the compressed air filter pressure reducing valve, the second flow meter, and the second regulating valve in the air supply device are skid-mounted as a distribution skid.

[0020] Specifically, a quenching protection air distribution ring pipe and a quenching protection fan are connected above the spray gun assembly to provide protection air to the spray gun assembly and form air isolation between the spray gun assembly and the high-temperature flue gas.

[0021] Specifically, a flue gas temperature detection element is further provided at the flue gas outlet of the quenching tower for detecting the temperature of the high-temperature flue gas after cooling through the quenching tower.

[0022] Compared with the existing technology, the advantages of the present application are: the present application designs a return pipe in the liquid supply device, and adds a back pressure valve on the return pipe. The return pipe with the back pressure valve makes the return water volume in the liquid supply device controllable, and the flow rate of the quenching water pump in the liquid supply circuit does not fluctuate with changes in working conditions. The liquid supply pressure on the outlet pipe of the quenching water pump is stable, and the service life of the quenching water pump is longer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 is a schematic diagram of the quenching control system described in the embodiment of the present application;

[0025] Figure 2 Schematic diagram of the liquid supply device of the quenching control system in the embodiment of the present application;

[0026] Figure 3 Schematic diagram of the air supply device of the quenching control system in the embodiment of the present application;

[0027] Figure 4 Schematic diagram of the skid-mounted quench pump station module and distribution module of the quench control system in the embodiment of the present application;

[0028] In the figure, 1. quenching tower; 2. liquid supply device; 3. air supply device; 4. spray gun assembly; 10. smoke temperature detection element; 20. quenching pump station module; 21. quenching water tank; 22. liquid supply circuit; 23. return circuit; 221. quenching water pump; 222. remote pressure gauge; 223. first flow meter; 224. first regulating valve; 225. needle regulating valve; 226. pressure gauge; 2211. quenching water pump; 2212. quenching water pump; 231. back pressure valve; 30. distribution module; 31. air supply circuit; 32. atomizing compressed air distribution ring pipe; 311. compressed air filter pressure reducing valve; 312. second flow meter; 313. second regulating valve; 41. spray gun; 42. spray gun; 51. quenching protection air spray distribution ring pipe; 52. quenching protection fan. DETAILED DESCRIPTION

[0029] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0030] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0031] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0032] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0033] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples. However, one skilled in the art will appreciate that the aspects described can be practiced without these specific details.

[0034] The embodiment of the present application provides a quenching control system, such as Figure 1 As shown, the quenching control system includes: a quenching tower 1, a liquid supply device 2, an air supply device 3, and a spray gun assembly 4.

[0035] The quenching tower 1 is a high-temperature flue gas treatment device that uses atomized coolant to cool the high-temperature flue gas inside the quenching tower 1.

[0036] The liquid supply device 2 is arranged as a whole outside the quenching tower 1, and a pipe leading out of the liquid supply device 2 serves as the liquid supply outlet end of the liquid supply device 2. The liquid supply outlet end of the liquid supply device 2 is connected to the inlet of the spray gun assembly 4. The liquid supply device 2 supplies coolant to the top of the quenching tower 1, that is, the liquid supply device 2 supplies coolant to the spray gun assembly 4. The liquid supply device 2 is provided with a quenching water tank 21, a liquid supply circuit 22 and a return circuit 23; the quenching water pump 221 in the liquid supply circuit 22 draws the quenching water in the quenching water tank 21 into the pipeline of the liquid supply circuit 22, and then transports it to the quenching tower 1. The liquid supply circuit 22 supplies the quenching water in the quenching water tank 21 to the spray gun assembly 4 at the top of the quenching tower 1; the return circuit 23 is arranged behind the quenching water pump 221 in the liquid supply circuit 22 and is connected to the quenching water tank 21. The return circuit 23 can control the reflux water volume in the return circuit 23 according to the actual liquid supply flow in the liquid supply circuit 22 through the back pressure valve 231 arranged on the return circuit 23, thereby adjusting the liquid supply flow in the liquid supply circuit 22, thereby ensuring that the liquid supply flow in the liquid supply circuit 22 is stable, and the liquid supply flow at the liquid supply outlet end of the liquid supply device 2 always remains stable.

[0037] The air supply device 3 is arranged as a whole outside the quenching tower 1. The atomizing compressed air distribution ring pipe 32 in the air supply device 3 is arranged above the spray gun assembly 4. The atomizing compressed air distribution ring pipe 32 in the air supply device 3 leads out a pipe as the air supply outlet end of the air supply device 3. The air supply outlet end of the air supply device 3 is connected to the inlet of the spray gun assembly 4. The air supply device 3 supplies compressed air to the top of the quenching tower 1, that is, the air supply device 3 supplies compressed air to the spray gun assembly 4.

[0038] The spray gun assembly 4 is inserted into the quenching tower 1 from the top. The spray gun assembly 4 sprays a mixture of coolant provided by the liquid supply device 2 and compressed air provided by the air supply device 3 into the quenching tower 1 in the form of a mist from the top of the quenching tower 1. The mixture directly interacts with the flue gas in the quenching tower 1, causing the high-temperature flue gas to directly contact the atomized coolant. This causes the high-temperature flue gas to evaporate and gasify in a short period of time through heat exchange with the atomized coolant. The high-temperature flue gas quickly releases heat and its temperature drops. This process effectively prevents the re-synthesis of dioxins.

[0039] In one embodiment, if Figure 2 As shown, the pipeline of the liquid supply circuit 22 in the liquid supply device 2 is sequentially provided with a quenching water pump 221, a remote pressure gauge 222, a first flowmeter 223, and a first regulating valve 224. The quenching water pump 221 draws quenching water from the quenching water tank 21 into the pipeline of the liquid supply circuit 22 and delivers it to the top of the quenching tower 1. A remote pressure gauge 222 is provided behind the quenching water pump 221 to measure the pressure of the liquid supply in the pipeline of the liquid supply circuit 22. A first flowmeter 223 is provided behind the remote pressure gauge 222 to measure the flow rate of the liquid supply in the pipeline of the liquid supply circuit 22. A first regulating valve 224 is provided behind the first flowmeter 223 to adjust and control the flow rate of the liquid supply in the pipeline of the liquid supply circuit 22 according to the flow rate of the liquid supply in the pipeline of the liquid supply circuit 22 measured by the first flowmeter 223.

[0040] In one embodiment, if Figure 2 As shown, two parallel quenching water pumps 2211 and 2212 are provided on the pipeline of the liquid supply circuit 22 in the liquid supply device 2. The two parallel quenching water pumps 2211 and 2212 are used in one and standby in the other. When one of the two parallel quenching water pumps 2211 and 2212 fails, the other quenching water pump can still maintain normal operation and provide power to transport the coolant in the quenching water tank 21 to the spray gun assembly 4.

[0041] In one embodiment, if Figure 3As shown, the air supply device 3 is provided with an air supply circuit 31 and an atomizing compressed air distribution loop 32. The air supply circuit 31 is used to deliver compressed air to the atomizing compressed air distribution loop 32, which is used to temporarily store compressed air and distribute the compressed air to the spray gun assembly 4. The pipeline of the air supply circuit 31 is provided with a compressed air filter pressure reducing valve 311, a second flow meter 312, and a second regulating valve 313. The compressed air filter pressure reducing valve 311 is provided at the air inlet of the pipeline of the air supply circuit 31 and is used to reduce the pressure of the compressed air and filter impurities and particulate matter in the compressed air. The second flow meter 312 is provided on the pipeline behind the compressed air filter pressure reducing valve 311. The second flow meter 312 measures the flow rate of compressed air in the pipeline of the air supply circuit 31. The second regulating valve 313 is provided on the pipeline behind the second flow meter 312. The second regulating valve 313 adjusts and controls the flow rate of compressed air in the pipeline of the air supply circuit 31 based on the compressed air flow rate in the pipeline of the air supply circuit 31 measured by the second flow meter 312.

[0042] In one embodiment, a second flowmeter 312 is electrically connected to the second regulating valve 313 and the first flowmeter 223. The second flowmeter 312 is electrically connected to the first flowmeter 223 and is used to determine the flow rate of compressed air to be supplied by the air supply device 3 using the water flow rate measured by the first flowmeter 223. Specifically, the water flow rate measured by the first flowmeter 223 controls the compressed air flow rate measured by the second flowmeter 312. The second flowmeter 312 is electrically connected to the second regulating valve 313 and is used to control the opening of the second regulating valve 313 using the compressed air flow rate measured by the second flowmeter 312. The electrical connection between the second flowmeter 312, the second regulating valve 313, and the first flowmeter 223 ensures a balanced ratio between the water flow rate and the compressed air flow rate, thereby ensuring effective atomization of the coolant in the spray gun assembly 4, stabilizing the operation of the spray gun assembly 4, and reducing the occurrence of wall wetting in the quench tower 1. This also reduces compressed air usage during periods of low water flow, significantly saving energy.

[0043] In one embodiment, if Figure 4As shown, the quenching water pump 221, the remote pressure gauge 222, the first flow meter 223, the first regulating valve 224 and the back pressure valve 231 of the return circuit 23 of the liquid supply device 2 are skid-mounted to form a quenching pump station module 20. The quenching pump station module 20 can be skid-mounted and manufactured in the manufacturing plant and directly used at the construction site. It can be used by connecting the inlet and outlet pipes of the quenching pump station module 20, reducing the workload on site and avoiding performance degradation caused by insufficient precision due to limitations of site conditions. The compressed air filter pressure reducing valve 311, the second flow meter 312 and the second regulating valve 313 installed on the pipeline of the air supply circuit 31 in the air supply device 3 and the needle regulating valve 225 and the pressure gauge 226 installed on the pipeline of the liquid supply circuit 22 in the liquid supply device 2 are skid-mounted to form a distribution module 30. The distribution module 30 can be skid-mounted and manufactured in the manufacturing plant and directly used at the construction site. It can be used by connecting the inlet and outlet pipes of the distribution module 30, reducing the workload on site and avoiding performance degradation caused by insufficient precision due to site conditions.

[0044] In one embodiment, if Figure 1 As shown, a quenching protection air spray distribution ring pipe 51 and a quenching protection fan 52 are also connected above the spray gun assembly 4. The quenching protection air spray distribution ring pipe 51 and the quenching protection fan 52 provide quenching protection air to the spray gun assembly 4. The quenching protection air is sprayed by the spray gun assembly 4 toward the quenching tower 1. Air isolation is formed between the spray gun assembly 4 and the high-temperature flue gas in the quenching tower 1, which protects the spray gun assembly 4 and extends the service life of the spray gun assembly 4.

[0045] In one embodiment, if Figure 1 As shown, the spray gun assembly 4 includes a spray gun 41 and a spray gun 42, which are respectively inserted obliquely on both sides above the quench tower 1. The end of the liquid supply device 2 is divided into two branches, each connected to the spray gun 41 and the spray gun 42. Both branches are equipped with a needle regulating valve 225 and a pressure gauge 226. The needle regulating valve 225 is used to manually adjust the cooling water flow in the branch. By manually adjusting the needle regulating valve 225 on the two branches, the cooling water flow in the two branches is balanced. A pressure gauge 226 is installed behind the needle regulating valve 225 to measure the cooling water pressure in the branch. The data measured by the pressure gauge 226 can be used to understand the effect of the adjustment of the needle regulating valve 225. The atomizing compressed air distribution ring 32 in the air supply device 3 has two outlets, each connected to the spray gun 41 and the spray gun 42. The spray gun 41 and the spray gun 42 provide atomized coolant to the quenching tower 1. The use of two spray guns enables a large spray range and a good spray effect.

[0046] In one embodiment, if Figure 1As shown, a smoke temperature detection element 10 is also provided at the smoke outlet of the quenching tower 1 for detecting the temperature of the high-temperature smoke after cooling treatment to ensure that the smoke at the release point of the quenching tower 1 is completely cooled.

[0047] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A quenching control system, characterized in that: include: The quench tower is used to cool the high-temperature flue gas using atomized coolant; a liquid supply device, disposed outside the quenching tower, for supplying cooling liquid to the top of the quenching tower; an air supply device, disposed outside the quenching tower, for supplying compressed air to the top of the quenching tower; A spray gun assembly is provided at the top of the quenching tower and is used to provide atomized coolant to the quenching tower; the outlet end of the atomizing compressed air distribution ring pipe of the liquid supply device is connected to the spray gun assembly, and the outlet end of the liquid supply device is connected to the spray gun assembly; Wherein, the liquid supply device includes: a quenching water tank, a liquid supply circuit and a return circuit; The liquid supply circuit is used to supply the quenching water in the quenching water tank to the quenching tower; The reflux circuit is arranged behind the quenching water pump in the liquid supply circuit; a back pressure valve is provided on the reflux circuit, and the back pressure valve is used to control the amount of reflux water; the reflux circuit is used to adjust the liquid supply flow in the liquid supply circuit to ensure that the liquid supply flow in the liquid supply circuit is stable.

2. The rapid cooling control system according to claim 1, characterized in that: The pipeline of the liquid supply circuit is provided with a quenching water pump, a remote pressure gauge, a first flow meter and a first regulating valve. The quenching water pump draws quenching water from the quenching water tank into the pipeline of the liquid supply circuit and transports it to the top of the quenching tower. The remote pressure gauge and the first flow meter are used to measure the liquid supply pressure and liquid supply flow in the pipeline of the liquid supply circuit respectively. The first regulating valve is used to control the liquid supply flow in the pipeline of the liquid supply circuit.

3. The rapid cooling control system according to claim 2, characterized in that: The liquid supply circuit includes two parallel quenching water pumps, one of which is used and the other is reserved.

4. The rapid cooling control system according to claim 2, characterized in that: The quenching water pump, remote pressure gauge, first flow meter, first regulating valve and back pressure valve in the liquid supply device are skid-mounted as a quenching pump station module.

5. The rapid cooling control system according to claim 1, characterized in that: The pipeline of the air supply circuit of the air supply device includes: a compressed air filter pressure reducing valve, a second flow meter, a second regulating valve and an atomizing compressed air distribution ring pipe; the compressed air filter pressure reducing valve is used to reduce the pressure of the compressed air and filter impurities and particulate matter in the compressed air; the second flow meter and the second regulating valve are used to measure and control the compressed air flow in the pipeline of the air supply circuit respectively; the atomizing compressed air distribution ring pipe is used to temporarily store the compressed air and distribute the compressed air to the spray gun assembly.

6. The rapid cooling control system according to claim 1, characterized in that: The spray gun assembly includes two spray guns, which are obliquely inserted and arranged on both sides above the quenching tower; the end of the liquid supply device is divided into two branches, and needle regulating valves and pressure gauges are provided on the two branches. The needle regulating valve is used to manually adjust the cooling water flow on the branch, and the pressure gauge is used to measure the cooling water pressure on the branch; the two branches are respectively connected to the two spray guns; the atomizing compressed air distribution ring pipe of the liquid supply device is provided with two outlet ends, and the two outlet ends are respectively connected to the two spray guns.

7. The rapid cooling control system according to any one of claims 1 to 6, characterized in that: The second flowmeter is electrically connected to the second regulating valve and the first flowmeter. The second flowmeter is electrically connected to the first flowmeter and is used to control the compressed air flow measured by the second flowmeter using the water supply flow measured by the first flowmeter. The second flowmeter is electrically connected to the second regulating valve and is used to control the opening of the second regulating valve using the compressed air flow measured by the second flowmeter.

8. The rapid cooling control system according to any one of claims 1 to 6, characterized in that: The needle regulating valve and the pressure gauge in the liquid supply device, and the compressed air filter pressure reducing valve, the second flow meter, and the second regulating valve in the air supply device are skid-mounted as a distribution skid.

9. The rapid cooling control system according to claim 1, characterized in that: A quenching protection air distribution ring pipe and a quenching protection fan are also connected above the spray gun assembly to provide quenching protection air to the spray gun assembly, forming air isolation between the spray gun assembly and the high-temperature flue gas.

10. The rapid cooling control system according to claim 1, characterized in that: A smoke temperature detection element is also provided at the smoke outlet of the quenching tower for detecting the temperature of the high-temperature smoke after cooling through the quenching tower.

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