Dedusting and denitration integrated device for chemical production
By designing an integrated dust removal and denitrification device for chemical production, the problems of high dust content and dust rekindling in the flue gas outlet of chemical plant boilers are solved, and efficient dust removal and denitrification are achieved, extending the catalyst life and reducing operating costs.
Patent Information
- Application Number
- CN202421317907.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The dust content in the flue gas exported by chemical plant factory boilers is high, the composition is complex, which affects the operation of the catalyst, and the possibility of dust rekindling is high, the efficiency and life of the catalyst are reduced, and the risk of filter bag paste bags is high.
Design a dust removal and denitrification integrated device for chemical production, including four side-by-side processing boxes, each processing box is equipped with a filter bag rack, denitrification catalyst and pulse dust collector, and the flue gas and nitrogen are empty through the gas supply assembly. The mixed gas is delivered to the treatment box for filtration and denitrification, and pulsed soot blowing with high pressure nitrogen through the blowing assembly to clean the filter bag.
Effectively remove dust in the flue gas, reduce the risk of dust rekindling, extend the life of the catalyst, reduce the number of system maintenance, and reduce operating costs.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of dust removal and denitration equipment, in particular to an integrated dust removal and denitration device for chemical production. Background Art
[0002] In order to turn the gasification slag, carbon 12 waste liquid, and chemical tail gas produced by chemical plants into treasure and generate economic benefits, a new type of small and medium-sized industrial steam boiler was built to utilize the waste heat of the "three wastes". However, the dust content in the flue gas at the outlet of the boiler is high and the composition is complex, which is not conducive to the operation of the catalyst; the carbon content in the dust is also high, and the possibility of re-ignition is very high, requiring a cyclone furnace to burn again; the water content in the flue gas is relatively high, which can easily reduce the efficiency and life of the catalyst, and the risk of filter bag sticking is also high, so we proposed an integrated dust removal and denitrification device for chemical production to solve the above problems. Utility Model Content
[0003] In view of the deficiencies of the prior art, the utility model provides an integrated dust removal and denitrification device for chemical production, which solves the problems of low cost of high-temperature denitrification and dust re-ignition.
[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: an integrated dust removal and denitrification device for chemical production, including a treatment box, four of which are arranged side by side, an air inlet pipe is arranged at the lower middle part of the side wall of each of the treatment boxes, an air outlet pipe is arranged at the top of each of the treatment boxes, and an ash discharge door is arranged on the side wall of each of the treatment boxes near the bottom;
[0005] A filter bag rack is provided at the upper middle part of the inner cavity of each treatment box, and a plurality of filter bags are provided at the bottom of the filter bag rack. A denitrification catalyst is provided in the inner cavity of each treatment box and near the top. An air supply assembly is provided on the outer side of the treatment box, and the air outlet end of the air supply assembly is conductively connected to each of the air inlet pipes. An exhaust assembly is provided above the treatment box, and the air inlet end of the exhaust assembly is conductively connected to the air outlet end of each of the air outlet pipes. A pulse dust collector is inlaid and installed on the outer wall of each treatment box, and the air outlet end of the pulse dust collector is located above the filter bag rack. An air blowing assembly is provided on one side of the treatment box, and the air outlet end of the air blowing assembly is conductively connected to one side of the bottom of the treatment box and the air inlet end of the pulse dust collector.
[0006] Preferably, the air supply assembly comprises an air guide pipe, one end of the air guide pipe is connected to a smoke pipe, and a nitrogen air pipe is serially connected on the air guide pipe and close to the smoke pipe;
[0007] Four first branch pipes are connected to the air guide pipe at a side away from the smoke pipe, and the bottom ends of the first branch pipes are conductively connected to the air inlet pipe.
[0008] Preferably, a first valve is serially connected in the middle of each of the first branch pipes.
[0009] Preferably, the exhaust assembly includes a collecting pipe, the gas outlet end of the collecting pipe is connected to the exhaust pipe, the lower surface of the collecting pipe is connected to four second branch pipes, and the bottom ends of the second branch pipes are conductively connected to the gas outlet pipe.
[0010] Preferably, each of the second branch pipes is serially connected with a second valve.
[0011] Preferably, the blowing assembly comprises a delivery pipe, one end of which is connected to a nitrogen pipe, the other end of which is connected in series to four third branch pipes, and each of the third branch pipes is conductively connected to each of the pulse dust collectors;
[0012] Four fourth branch pipes are connected in series on the delivery pipe near the nitrogen pipe, and each of the fourth branch pipes is conductively connected to the bottom end of each side wall of the processing box. A fifth branch pipe is connected in series in the middle of the delivery pipe, and four sixth branch pipes are connected in series on the fifth branch pipe, and the four sixth branch pipes are conductively connected to the bottom end of each side wall of the processing box, and the sixth branch pipe is located above the fourth branch pipe.
[0013] Preferably, a third valve is connected in series on each of the fourth branch pipes and close to the processing box, and a fourth valve is connected in series on each of the sixth branch pipes and close to the processing box. Beneficial Effects
[0014] The utility model provides an integrated dust removal and denitrification device for chemical production. Compared with the prior art, it has the following beneficial effects:
[0015] The integrated dust removal and denitration device for chemical production can transport flue gas and nitrogen-air mixed gas to four processing boxes through four air intake pipes through an air supply component. Since an air intake pipe is provided at the lower middle part of the side wall of each processing box, the transported gas will move upward, so that multiple filter bags made of nickel-based alloy on the filter bag rack can filter the gas flowing through, and then the dust in the gas can be removed. Then the gas that has been dusted will move upward, and then the flue gas can be denitrated through a denitration catalyst, so that the treated gas can be discharged from the air outlet pipe, and then the gas discharged from each processing box can be collected through the exhaust component, so that subsequent treatment can be convenient.
[0016] When the filter bags need to be cleaned, nitrogen can be connected externally through the blowing component, so that the nitrogen can be transported to the processing box and the pulse dust collector. At this time, the pulse dust collector can perform pulse soot blowing on the filter bags. Since high-pressure nitrogen is used as the gas source for pulse soot blowing of the filter bags, the impact of the blowing on the oxygen content of the flue gas can be reduced, and the probability of dust re-ignition can also be reduced. At the same time, the nitrogen discharged from the branch pipe of the blowing component can also clean the inside of the processing box, ensuring the cleaning effect of the inside of the processing box. The dust can be discharged by opening the ash discharge door. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0018] Figure 2 It is a schematic diagram of the internal structure of the utility model.
[0019] Figure 3 This is a schematic diagram of the structure of the air supply component of the utility model.
[0020] Figure 4 This is a schematic diagram of the exhaust assembly structure of the utility model.
[0021] Figure 5 This is a schematic diagram of the structure of the blowing component of the utility model.
[0022] In the figure: 1. treatment box; 2. air inlet pipe; 3. air outlet pipe; 4. ash discharge door; 5. filter bag rack; 6. filter bag; 7. denitrification catalyst; 8. air supply assembly; 81. air guide pipe; 82. flue gas pipe; 83. nitrogen air pipe; 84. first branch pipe; 85. first valve; 9. exhaust assembly; 91. collecting pipe; 92. discharge pipe; 93. second branch pipe; 94. second valve; 10. pulse dust collector; 11. blowing assembly; 111. conveying pipe; 112. nitrogen pipe; 113. third branch pipe; 114. fourth branch pipe; 115. third valve; 116. fifth branch pipe; 117. sixth branch pipe; 118. fourth valve. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] See also Figure 1-2The utility model provides a technical solution: an integrated dust removal and denitrification device for chemical production, comprising a treatment box 1, four treatment boxes 1 are provided, and the four treatment boxes 1 are arranged side by side, each treatment box 1 is provided with an air inlet pipe 2 at the lower middle position of the side wall, each treatment box 1 is provided with an air outlet pipe 3 at the top, and each treatment box 1 is provided with an ash discharge door 4 on the side wall and near the bottom; a filter bag rack 5 is provided at the upper middle position of the inner cavity of each treatment box 1, and a plurality of filter bags 6 are provided at the bottom of the filter bag rack 5, and each treatment box 1 is provided with an air inlet pipe 2 at the lower middle position of the side wall, and an air outlet pipe 3 is provided at the top of the side wall of each treatment box 1, and a ash discharge door 4 is provided near the bottom of the side wall of each treatment box 1; a filter bag rack 5 is provided at the upper middle position of the inner cavity of each treatment box 1, and a plurality of filter bags 6 are provided at the bottom of the filter bag rack 5, and a filter bag rack 5 is provided at the inner cavity of each treatment box 1 and near the top A denitration catalyst 7 is provided, an air supply assembly 8 is provided on the outside of the treatment box 1, and the air outlet end of the air supply assembly 8 is connected to each air inlet pipe 2, an exhaust assembly 9 is provided above the treatment box 1, and the air inlet end of the exhaust assembly 9 is connected to the air outlet end of each air outlet pipe 3, a pulse dust collector 10 is inlaid and installed on the outer wall of each treatment box 1, and the air outlet end of the pulse dust collector 10 is located above the filter bag holder 5, and a blowing assembly 11 is provided on one side of the treatment box 1, and the air outlet end of the blowing assembly 11 is connected to the bottom side of the treatment box 1 and the air inlet end of the pulse dust collector 10;
[0025] Through the air supply component 8, the flue gas and the nitrogen-air mixed gas can be transported to the four treatment boxes 1 through the four air inlet pipes 2. Since the air inlet pipe 2 is arranged at the lower middle part of the side wall of each treatment box 1, the transported gas will move upward, so that the multiple filter bags 6 made of nickel-based alloy on the filter bag frame 5 can filter the flowing gas, and then the dust in the gas can be removed. Then the dust-removed gas will move upward, and then pass through the denitration catalyst 7 to denitrate the flue gas, so that the treated gas can be discharged from the outlet pipe 3, and then the gas discharged from each treatment box 1 can be discharged through the exhaust component 9. The dust is collected and collected, which is convenient for subsequent processing. When the filter bag 6 needs to be cleaned, the blowing component 11 can be connected to nitrogen, so that the nitrogen can be transported to the processing box 1 and the pulse dust collector 10. At this time, the pulse dust collector 10 can perform pulse soot blowing on the filter bag 6. Since high-pressure nitrogen is used as the gas source for pulse soot blowing of the filter bag 6, the effect of blowing on the oxygen content of the flue gas can be reduced, and the probability of dust re-ignition can be reduced. At the same time, the nitrogen discharged from the branch pipe of the blowing component 11 can also clean the inside of the processing box 1, ensuring the cleaning effect of the inside of the processing box 1. The dust can be discharged by opening the ash discharge door 4.
[0026] See also Figure 2 , Figure 3 The air supply assembly 8 includes an air guide pipe 81, one end of which is connected to a smoke pipe 82, and a nitrogen air pipe 83 is connected in series on the air guide pipe 81 and close to the smoke pipe 82; four first branch pipes 84 are connected on the air guide pipe 81 and away from the smoke pipe 82, and the bottom end of the first branch pipe 84 is connected to the air inlet pipe 2, and the middle of each first branch pipe 84 is connected in series with a first valve 85;
[0027] Through the flue gas pipe 82 and the nitrogen-air pipe 83 in the air supply assembly 8, the flue gas and the nitrogen-air mixed gas can be connected externally respectively, and the mixed gas of the two can be transported to each first branch pipe 84 through the air guide pipe 81, and then can be introduced into the processing box 1 through the air intake pipe 2. Through the first valve 85, the staff can flexibly control whether the mixed gas enters the current processing box 1 according to needs.
[0028] See also Figure 2 , Figure 3 The exhaust assembly 9 includes a collecting pipe 91, the outlet end of the collecting pipe 91 is connected to the exhaust pipe 92, the lower surface of the collecting pipe 91 is connected to four second branch pipes 93, and the bottom end of the second branch pipe 93 is connected to the outlet pipe 3, and each second branch pipe 93 is connected in series with a second valve 94;
[0029] Through the collecting pipe 91 in the exhaust component 9, it can be connected to the outlet pipe 3 through the second branch pipe 93, and can also be connected to other pipelines through the exhaust pipe 92, so that the gas exhausted from the processing box 1 can be collected. By closing the second valve 94, the collected gas can be prevented from flowing back into the non-operating processing box 1, which is convenient for the staff to repair the processing box 1.
[0030] See also Figure 2 , Figure 4 The blowing assembly 11 includes a delivery pipe 111, one end of the delivery pipe 111 is connected to a nitrogen pipe 112, the other end of the nitrogen pipe 112 is connected in series with four third branch pipes 113, and each third branch pipe 113 is connected to each pulse dust collector 10; four fourth branch pipes 114 are connected in series on the delivery pipe 111 and near the nitrogen pipe 112, each fourth branch pipe 114 is connected to the bottom end of the side wall of each treatment box 1, a fifth branch pipe 116 is connected in series in the middle of the delivery pipe 111, and four sixth branch pipes 117 are connected in series on the fifth branch pipe 116, and the four sixth branch pipes 117 are connected to the bottom end of the side wall of each treatment box 1, the sixth branch pipe 117 is located above the fourth branch pipe 114, each fourth branch pipe 114 is connected in series with a third valve 115 and is close to the treatment box 1, and each sixth branch pipe 117 is connected in series with a fourth valve 118 and is close to the treatment box 1;
[0031] Through the delivery pipe 111 in the blowing component 11, nitrogen can be connected to the outside through the nitrogen pipe 112, and can be connected to the pulse dust collector 10 through the third branch pipe 113. At the same time, it can be connected to the bottom of the inner cavity of the processing box 1 through the fourth branch pipe 114, the fifth branch pipe 116 and the sixth branch pipe 117, so that nitrogen can be conveniently delivered to the pulse dust collector 10 and the processing box 1, and then the filter bag 6 and the inside of the processing box 1 can be dusted. At the same time, using high-pressure nitrogen as the gas source for soot blowing can reduce the impact of blowing on the oxygen content of the flue gas and reduce the probability of dust re-ignition.
[0032] During operation, the flue gas and nitrogen-air mixed gas can be transported to the four treatment boxes 1 through the four air inlet pipes 2 through the air supply component 8. Since the air inlet pipe 2 is arranged at the lower middle part of the side wall of each treatment box 1, the transported gas will move upward, so that the multiple filter bags 6 made of nickel-based alloy on the filter bag frame 5 can filter the gas flowing through, and then the dust in the gas can be removed. Then the gas after dust removal will move upward, and then pass through the denitration catalyst 7 to perform flue gas denitration, so that the treated gas can be discharged from the outlet pipe 3, and then the gas discharged from each treatment box 1 can be discharged through the exhaust component 9. The body is collected to facilitate subsequent processing. When the filter bag 6 needs to be cleaned, the blowing component 11 can be connected to nitrogen, so that the nitrogen can be transported to the processing box 1 and the pulse dust collector 10. At this time, the pulse dust collector 10 can perform pulse soot blowing on the filter bag 6. Since high-pressure nitrogen is used as the gas source for pulse soot blowing of the filter bag 6, the effect of blowing on the oxygen content of the flue gas can be reduced, and the probability of dust re-ignition can be reduced. At the same time, the nitrogen discharged from the branch pipe of the blowing component 11 can also clean the inside of the processing box 1, ensuring the cleaning effect of the inside of the processing box 1. The dust can be discharged by opening the ash discharge door 4.
[0033] Through the flue gas pipe 82 and the nitrogen-air pipe 83 in the air supply component 8, the flue gas and the nitrogen-air mixed gas can be connected respectively, and the mixed gas of the two can be transported to each first branch pipe 84 through the air guide pipe 81, and then can be introduced into the processing box 1 through the air inlet pipe 2. Through the first valve 85, it is convenient for the staff to flexibly control whether the mixed gas enters the current processing box 1 according to needs. Through the collecting pipe 91 in the exhaust component 9, it can be connected with the outlet pipe 3 through the second branch pipe 93, and can be connected to other pipes through the exhaust pipe 92, so that the gas discharged from the processing box 1 can be collected. By closing the second valve 94, the collected gas can be prevented from flowing back into the non-operating processing box 1, which is convenient for the staff to inspect and repair the processing box 1.
[0034] Through the delivery pipe 111 in the blowing component 11, nitrogen can be connected to the outside through the nitrogen pipe 112, and can be connected to the pulse dust collector 10 through the third branch pipe 113. At the same time, it can be connected to the bottom of the inner cavity of the processing box 1 through the fourth branch pipe 114, the fifth branch pipe 116 and the sixth branch pipe 117, so that nitrogen can be conveniently delivered to the pulse dust collector 10 and the processing box 1, and then the filter bag 6 and the inside of the processing box 1 can be dusted. At the same time, using high-pressure nitrogen as the gas source for soot blowing can reduce the impact of blowing on the oxygen content of the flue gas and reduce the probability of dust re-ignition.
[0035] In summary, the device occupies a small area by combining the dust removal and denitrification flue gas purification systems into one. The high-temperature and low-dust denitrification environment is conducive to extending the life of the catalyst and reducing the time and frequency of system maintenance. The nickel-based alloy filter bags can ensure the dust removal efficiency under high temperature conditions and reduce the risk of bag sticking. At the same time, it is not afraid of the impact of dust re-ignition on operation, thereby reducing operating costs.
[0036] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
Claims
1. An integrated dust removal and denitrification device for chemical production, characterized in that: It comprises a processing box (1), wherein four processing boxes (1) are provided and the four processing boxes (1) are arranged side by side, an air inlet pipe (2) is provided at a lower position in the middle of a side wall of each processing box (1), an air outlet pipe (3) is provided at the top of each processing box (1), and an ash discharge door (4) is provided at a position near the bottom of the side wall of each processing box (1); A filter bag holder (5) is provided at an upper middle position of the inner cavity of each of the treatment boxes (1), a plurality of filter bags (6) are provided at the bottom of the filter bag holder (5), a denitration catalyst (7) is provided in the inner cavity of each of the treatment boxes (1) and near the top position, an air supply assembly (8) is provided on the outer side of the treatment box (1), and the air outlet end of the air supply assembly (8) is conductively connected to each of the air inlet pipes (2), an exhaust assembly (9) is provided above the treatment box (1), and the air inlet end of the exhaust assembly (9) is conductively connected to the air outlet end of each of the air outlet pipes (3), a pulse dust collector (10) is inlaid and installed on the outer wall of each of the treatment boxes (1), and the air outlet end of the pulse dust collector (10) is located above the filter bag holder (5), and a blowing assembly (11) is provided on one side of the treatment box (1), and the air outlet end of the blowing assembly (11) is conductively connected to one side of the bottom of the treatment box (1) and the air inlet end of the pulse dust collector (10).
2. The integrated dust removal and denitrification device for chemical production according to claim 1, characterized in that: The air supply assembly (8) comprises an air guide pipe (81), one end of the air guide pipe (81) is connected to a smoke pipe (82), and a nitrogen air pipe (83) is serially connected to the air guide pipe (81) at a side close to the smoke pipe (82); Four first branch pipes (84) are connected to the air guide pipe (81) on a side away from the smoke pipe (82), and the bottom ends of the first branch pipes (84) are conductively connected to the air inlet pipe (2).
3. The integrated dust removal and denitrification device for chemical production according to claim 2, characterized in that: A first valve (85) is serially connected to the middle portion of each of the first branch pipes (84).
4. The integrated dust removal and denitrification device for chemical production according to claim 1, characterized in that: The exhaust assembly (9) comprises a collecting pipe (91), the outlet end of the collecting pipe (91) is connected to an exhaust pipe (92), the lower surface of the collecting pipe (91) is connected to four second branch pipes (93), and the bottom ends of the second branch pipes (93) are conductively connected to the outlet pipe (3).
5. The integrated dust removal and denitrification device for chemical production according to claim 4, characterized in that: Each of the second branch pipes (93) is serially connected to a second valve (94).
6. The integrated dust removal and denitrification device for chemical production according to claim 1, characterized in that: The air blowing assembly (11) comprises a delivery pipe (111), one end of the delivery pipe (111) is connected to a nitrogen pipe (112), the other end of the nitrogen pipe (112) is connected in series to four third branch pipes (113), and each of the third branch pipes (113) is conductively connected to each of the pulse dust collectors (10); Four fourth branch pipes (114) are connected in series on the delivery pipe (111) and near the nitrogen pipe (112), and each of the fourth branch pipes (114) is conductively connected to the bottom end of the side wall of each of the processing boxes (1). A fifth branch pipe (116) is connected in series in the middle of the delivery pipe (111), and four sixth branch pipes (117) are connected in series on the fifth branch pipe (116), and the four sixth branch pipes (117) are conductively connected to the bottom end of the side wall of each of the processing boxes (1), and the sixth branch pipe (117) is located above the fourth branch pipe (114).
7. The integrated dust removal and denitrification device for chemical production according to claim 6, characterized in that: A third valve (115) is serially connected to each of the fourth branch pipes (114) and is located close to the processing box (1). A fourth valve (118) is serially connected to each of the sixth branch pipes (117) and is located close to the processing box (1).