Security device of bag type dust collector for coke oven tail gas dry desulphurization

Abstract

The utility model discloses a security device for a coke oven tail gas dry desulphurization bag type dust collector, which relates to the technical field of bag type dust collector protection and comprises a coke oven, a flue gas outlet of the coke oven is communicated with a shunting mechanism through a connecting pipeline, the shunting mechanism comprises a flue gas pipeline, the upper end of the flue gas pipeline is communicated with a gas outlet of the pipeline, and the lower end of the flue gas pipeline is communicated with a gas outlet of the pipeline. A water pipe is arranged on the right side of the flue gas pipeline, the upper end of the water pipe is communicated with a water outlet of a water supplementing station, flow dividing pipelines are fixedly connected to the surfaces of the sides, far away from each other, of the flue gas pipeline and the water pipe, and the side surfaces of the flue gas pipeline and the water pipe are communicated with the corresponding flow dividing pipelines through equidistant through holes; the lower side surfaces of the two shunting pipelines are communicated with the upper end opening of the input pipeline respectively, tail gas is partially shunted and cooled, part of the tail gas is preferentially subjected to heat exchange work through the waste heat boiler, energy is saved, meanwhile, the temperature of the tail gas is reduced, the phenomenon that a bag type dust collector is burnt due to the too high gas temperature is avoided, and meanwhile loss of secondarily-utilized heat is avoided.

Description

Technical Field

[0001] This utility model relates to the field of bag filter protection technology, specifically a safety device for a dry desulfurization bag filter for coke oven tail gas. Background Technology

[0002] A baghouse dust collector is a dry dust filtration device. It is suitable for collecting fine, dry, non-fibrous dust. The filter bags are made of woven filter cloth or non-woven felt, utilizing the filtration effect of the fibrous fabric to filter dust-laden gas. When the dust-laden gas enters the baghouse dust collector, larger, heavier dust particles settle down due to gravity and fall into the ash hopper. The gas containing finer dust particles is purified as it passes through the filter media, as the dust is trapped.

[0003] During the use of baghouse dust collectors, the gas temperature should be maintained between 280 and 320 degrees Celsius. Excessive temperature can damage the baghouse dust collector. In the current method of treating coke oven exhaust gas, the gas is directly filtered through baghouse dust collectors, which poses a significant risk of overheating and makes it difficult to ensure the normal operation of the baghouse dust collector. Therefore, we propose a safety device for a dry desulfurization baghouse dust collector for coke oven exhaust gas. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a safety device for a dry desulfurization bag filter for coke oven tail gas. This device partially diverts the tail gas, allowing some of the tail gas to undergo heat exchange first. This saves energy and reduces the temperature of the tail gas, preventing the bag filter from burning out due to excessively high gas temperature and avoiding the loss of reusable heat. This effectively solves the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a safety device for a dry desulfurization baghouse dust collector for coke oven tail gas, comprising a coke oven, wherein the flue gas outlet of the coke oven is connected to a diversion mechanism via a connecting pipe, the diversion mechanism comprising a flue gas pipe, the upper end of which is connected to the outlet of a pipe, a water pipe disposed on the right side of the flue gas pipe, the upper end of which is connected to the outlet of a water replenishment station, and diversion pipes fixedly connected to the surfaces of the flue gas pipe and the water pipe on the sides that are farther apart, respectively; the side surfaces of the flue gas pipe and the water pipe are respectively connected to the corresponding diversion pipes through through holes opened at equal intervals. The two branch pipes are connected to the upper ports of the input pipes on their lower surfaces. The lower port of the left input pipe is connected to the steam inlet of the steam boiler, and the lower port of the right input pipe is connected to the cold water inlet of the steam boiler. A piston two is slidably connected inside the flue gas pipe. Through grooves are opened on the left and right sides of the upper surface of the piston two. The outlet of the flue gas pipe is connected to the dust removal mechanism through the conveying pipe. A piston one is slidably connected inside the water pipe. Push rods are fixedly connected to the upper ends of piston one and piston two, respectively. The upper ends of the two push rods pass through the inner walls of the flue gas pipe and the water pipe, respectively, and are connected to the power mechanism.

[0006] Piston 2 is designed to divert the exhaust gas by adjusting its position, thereby controlling the stability of the exhaust gas and preventing damage caused by excessive temperature. Piston 1 is designed to follow piston 2 and adjust its position, allowing the input of cold water to be adjusted according to the size of the exhaust gas diversion. This ensures that the exhaust gas and cold water entering the steam boiler are matched, preventing the steam boiler temperature from becoming too low. When the control and protection device is working, it first detects the exhaust gas temperature. When the exhaust gas temperature is higher than 320 degrees Celsius, the power mechanism drives two push rods to move down simultaneously, gradually opening the corresponding through holes. This allows some exhaust gas to enter the left diversion pipe while a corresponding amount of cold water enters the right diversion pipe. Then, some exhaust gas and cold water enter the steam boiler through the corresponding input pipes to generate steam, and the remaining exhaust gas enters the subsequent process.

[0007] Furthermore, the power mechanism includes a hydraulic rod, which is fixedly connected to the right side surface of the flue gas duct via a fixed seat. The input end of the hydraulic rod is electrically connected to the output end of an external power supply via an external control switch group. A connecting plate is fixedly connected to the upper end of the hydraulic rod, and corresponding push rods are fixedly connected to the left and right ends of the lower side surface of the connecting plate, respectively.

[0008] When the power mechanism is working, the hydraulic rod is controlled by an external control switch group, which in turn moves the connecting plate and thus the two push rods.

[0009] Furthermore, the safety device also includes a steam delivery mechanism, which includes a negative pressure pump. The steam delivery of the steam boiler is connected to a steam delivery pipeline via the negative pressure pump. The steam delivery pipeline is used to deliver steam to the location of use.

[0010] The generated steam is transported to the location of use via a negative pressure pump.

[0011] Furthermore, the dust removal mechanism includes a bag filter, the outlet of the flue gas duct is connected to the inlet of the bag filter through a conveying pipe, and the outlet of the bag filter is connected to a flue gas denitrification mechanism, which is used to denitrify the flue gas.

[0012] After the cooled exhaust gas enters the bag filter for dust removal, it enters the flue gas denitrification unit for denitrification and desulfurization, thus completing the waste gas treatment.

[0013] Furthermore, it also includes a temperature sensor, which is installed inside the connecting pipe.

[0014] Design a temperature sensor to detect the temperature of the exhaust gas and make an operational response accordingly.

[0015] Furthermore, it also includes a return pipe, through which the waste outlet of the steam boiler is connected to the right side of the delivery pipe.

[0016] After the heat of the diverted exhaust gas is consumed, it flows back into the conveying pipeline, where it mixes with the original high-temperature exhaust gas to cool it down.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This safety device for a dry desulfurization bag filter for coke oven tail gas has the following advantages:

[0018] 1. A second piston is designed so that the exhaust gas can be diverted by adjusting the position of the second piston, thereby controlling the stability of the exhaust gas and avoiding damage caused by excessive temperature.

[0019] 2. The design of piston one allows for position adjustment following piston two, which in turn adjusts the cold water input based on the size of the exhaust gas diversion, thus matching the exhaust gas and cold water entering the steam boiler and preventing the steam boiler temperature from becoming too low.

[0020] 3. Design a return pipeline to consume the heat of the diverted exhaust gas and return it to the inside of the delivery pipeline, so as to mix with the original high-temperature exhaust gas and cool it down. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the diversion mechanism of this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the diversion mechanism of this utility model.

[0024] In the diagram: 1. Coke oven; 2. Connecting pipe; 3. Diverting mechanism; 31. Flue gas pipe; 32. Water pipe; 33. Diverting pipe; 34. Input pipe; 35. Hydraulic rod; 36. Connecting plate; 37. Push rod; 38. Piston 1; 39. Piston 2; 310. Ventilation trough; 4. Temperature sensor; 5. Steam boiler; 6. Steam conveying mechanism; 7. Water replenishment station; 8. Conveying pipe; 9. Return pipe; 10. Bag filter; 11. Flue gas denitrification mechanism. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-3 This embodiment provides a technical solution: a safety device for a dry desulfurization bag filter for coke oven tail gas, comprising a coke oven, wherein the flue gas outlet of the coke oven 1 is connected to a diversion mechanism 3 via a connecting pipe 2, the diversion mechanism 3 includes a flue gas pipe 31, the upper end of the flue gas pipe 31 is connected to the outlet of the pipe 2, a water pipe 32 is provided on the right side of the flue gas pipe 31, the upper end of the water pipe 32 is connected to the outlet of a water supply station 7, and diversion pipes 33 are fixedly connected to the surfaces of the flue gas pipe 31 and the water pipe 32 that are farther apart, respectively, and the side surfaces of the flue gas pipe 31 and the water pipe 32 are respectively connected to the corresponding diversion pipes 33 through through holes opened at equal intervals, the two diversion pipes The lower surface of pipe 33 is connected to the upper port of input pipe 34. The lower port of input pipe 34 on the left side is connected to the steam inlet of steam boiler 5, and the lower port of input pipe 34 on the right side is connected to the cold water inlet of steam boiler 5. Piston 2 39 is slidably connected inside flue gas pipe 31. Through grooves are opened on the left and right sides of the upper surface of piston 2 39. The outlet of flue gas pipe 31 is connected to dust removal mechanism through conveying pipe 8. Piston 1 38 is slidably connected inside water pipe 32. Push rod 37 is fixedly connected to the upper ends of piston 1 38 and piston 2 39 respectively. The upper ends of the two push rods 37 pass through the inner walls of flue gas pipe 31 and water pipe 32 respectively and are connected to the power mechanism.

[0027] Piston 2 39 is designed to divert exhaust gas by adjusting its position, thereby controlling the stability of the exhaust gas and preventing damage caused by excessive temperature. Piston 1 38 is designed to follow piston 2 39 and adjust its position, thereby adjusting the cold water input according to the size of the exhaust gas diversion, so that the exhaust gas and cold water entering the steam boiler 5 are matched, thus preventing the steam boiler 5 from being too cold. When the control and protection device is working, the exhaust gas temperature is first detected. When the exhaust gas temperature is higher than 320 degrees Celsius, the power mechanism drives the two push rods 37 to move down simultaneously, thereby gradually opening the corresponding through holes. This allows part of the exhaust gas to enter the left diversion pipe 33, while a corresponding amount of cold water enters the right diversion pipe 33. Then, part of the exhaust gas and cold water enter the steam boiler 5 through the corresponding input pipe 34 for steam generation, and the remaining exhaust gas enters the subsequent process.

[0028] The power mechanism includes a hydraulic rod 35. The right side surface of the flue gas duct 31 is fixedly connected to the hydraulic rod 35 via a fixed seat. The input end of the hydraulic rod 35 is electrically connected to the output end of an external power supply via an external control switch group. The upper end of the hydraulic rod 35 is fixedly connected to a connecting plate 36. The left and right ends of the lower surface of the connecting plate 36 are respectively fixedly connected to corresponding push rods 37.

[0029] When the power mechanism is working, the hydraulic rod 35 is controlled by an external control switch group, which in turn drives the connecting plate 36 to move, thereby driving the two push rods 37 to move.

[0030] The safety device also includes a steam delivery mechanism 6, which includes a negative pressure pump. The steam delivery of the steam boiler 5 is connected to the steam delivery pipeline through the negative pressure pump. The steam delivery pipeline is used to deliver steam to the location of use.

[0031] The generated steam is transported to the location of use via a negative pressure pump.

[0032] The dust removal mechanism includes a bag filter 10. The outlet of the flue gas duct 31 is connected to the inlet of the bag filter 10 through a conveying pipe 8. The outlet of the bag filter 10 is connected to the flue gas denitrification mechanism 11, which is used to denitrify the flue gas.

[0033] After the cooled exhaust gas enters the bag filter 10 for dust removal, it enters the flue gas denitrification unit 11 for denitrification and desulfurization, thereby completing the waste gas treatment.

[0034] It also includes a temperature sensor 4, which is installed inside the connecting pipe 2.

[0035] A temperature sensor 4 is designed to detect the temperature of the exhaust gas and thus make an operational response.

[0036] It also includes a return pipe 9, through which the waste outlet of the steam boiler 5 is connected to the right side of the conveying pipe 8.

[0037] After the heat of the diverted exhaust gas is consumed, it flows back into the conveying pipe 8, where it mixes with the original high-temperature exhaust gas to cool it down.

[0038] The working principle of the safety device for a dry desulfurization bag filter for coke oven tail gas provided by this utility model is as follows:

[0039] First, the temperature of the exhaust gas is detected by temperature sensor 4. When the exhaust gas temperature is higher than 320 degrees Celsius, the hydraulic rod 35 is controlled by the external control switch group to work, thereby driving the connecting plate 36 to move, which in turn drives the two push rods 37 to move, thereby gradually opening the corresponding through holes. This allows some of the exhaust gas to enter the left diversion pipe 33, while a corresponding amount of cold water enters the right diversion pipe 33. Then, some of the exhaust gas and cold water enter the steam boiler 5 through the corresponding input pipe 34 to generate steam. The generated steam is transported to the usage location by the negative pressure pump. The remaining exhaust gas continues to be transported to the conveying pipe 8. After the heat of the exhaust gas in the steam boiler 5 is consumed, it flows back into the conveying pipe 8, where it mixes with the original high-temperature exhaust gas for cooling. After cooling, the exhaust gas enters the bag filter 10 for dust removal, and then enters the flue gas denitrification mechanism 11 for denitrification and desulfurization, thereby completing the waste gas treatment.

[0040] It is worth noting that the hydraulic rod 35 disclosed in the above embodiments is a Longxiang hydraulic rod, the temperature sensor 4 is a Keyence temperature sensor, and the operation of the temperature sensor 4 and the hydraulic rod 35 is controlled by an external control switch group using a method commonly used in the prior art.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A safety device for a dry desulfurization baghouse dust collector for coke oven tail gas, characterized in that: The coke oven (1) includes a flue gas outlet connected to a diversion mechanism (3) via a connecting pipe (2). The diversion mechanism (3) includes a flue gas pipe (31), the upper end of which is connected to the outlet of the pipe (2). A water pipe (32) is installed on the right side of the flue gas pipe (31), the upper end of which is connected to the outlet of the water supply station (7). Diversion pipes (33) are fixedly connected to the surfaces of the flue gas pipe (31) and the water pipe (32) that are farther apart. The side surfaces of the flue gas pipe (31) and the water pipe (32) are connected to the corresponding diversion pipes (33) via through holes opened at equal intervals. The lower surfaces of the two diversion pipes (33) are connected to the input pipes. The upper port of the pipe (34) is connected to the steam inlet of the steam boiler (5) at the lower port of the left input pipe (34), and the lower port of the right input pipe (34) is connected to the cold water inlet of the steam boiler (5). The second piston (39) is slidably connected inside the flue gas pipe (31). The upper surface of the second piston (39) is provided with through grooves on the left and right sides respectively. The outlet of the flue gas pipe (31) is connected to the dust removal mechanism through the conveying pipe (8). The first piston (38) is slidably connected inside the water pipe (32). The upper ends of the first piston (38) and the second piston (39) are respectively fixedly connected to the push rod (37). The upper ends of the two push rods (37) pass through the inner walls of the flue gas pipe (31) and the water pipe (32) respectively and are connected to the power mechanism.

2. The safety device for a dry desulfurization baghouse dust collector for coke oven tail gas according to claim 1, characterized in that: The power mechanism includes a hydraulic rod (35). The right side surface of the flue gas duct (31) is fixedly connected to the hydraulic rod (35) via a fixed seat. The input end of the hydraulic rod (35) is electrically connected to the output end of an external power supply via an external control switch group. The upper end of the hydraulic rod (35) is fixedly connected to a connecting plate (36). The left and right ends of the lower side surface of the connecting plate (36) are respectively fixedly connected to corresponding push rods (37).

3. The safety device for a dry desulfurization baghouse dust collector for coke oven tail gas according to claim 1, characterized in that: The safety device also includes a steam delivery mechanism (6), which includes a negative pressure pump. The steam delivery of the steam boiler (5) is connected to the steam delivery pipeline through the negative pressure pump. The steam delivery pipeline is used to deliver steam to the location of use.

4. The safety device for a dry desulfurization baghouse dust collector for coke oven tail gas according to claim 1, characterized in that: The dust removal mechanism includes a bag filter (10), the outlet of the flue gas duct (31) is connected to the inlet of the bag filter (10) through a conveying pipe (8), the outlet of the bag filter (10) is connected to the flue gas denitrification mechanism (11), and the flue gas denitrification mechanism (11) is used to denitrify the flue gas.

5. The safety device for a dry desulfurization baghouse dust collector for coke oven tail gas according to claim 1, characterized in that: It also includes a temperature sensor (4), which is installed inside the connecting pipe (2).

6. The safety device for a dry desulfurization baghouse dust collector for coke oven tail gas according to claim 1, characterized in that: It also includes a return pipe (9), through which the waste outlet of the steam boiler (5) is connected to the right side of the conveying pipe (8).

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