Tail gas denitration device for generator set

Abstract

The utility model relates to the technical field of generator set tail gas treatment, and discloses a tail gas denitration device for a generator set, which comprises a shell, a flow guide mechanism, a spraying mechanism and a catalysis mechanism, two ends of the shell are connected with an intake pipe and an exhaust pipe; a movable door is arranged on the shell and arranged on one side of the exhaust pipe. The flow guide mechanism is arranged in the shell, located on one side of the gas inlet pipe and used for dispersing and guiding tail gas. The spraying mechanism is arranged in the shell, located on one side of the flow guide mechanism and used for preliminary denitration of the tail gas; the catalysis mechanism comprises two groups of catalysis layers; the two groups of catalyst layers are arranged on one side of the spraying mechanism; the catalyst layer and the shell piece are provided with a quick release part; the quick release part comprises a fixed rod and a spring; the fixed rod is arranged on the shell, and one end of the fixed rod penetrates through the shell and extends into the catalyst layer; and the spring sleeves the outer wall of the fixed rod and is positioned between the shell and the catalytic layer.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment of generator sets, in particular to a tail gas denitration device for generator sets. Background Art

[0002] Gas-fired generator sets are new types of generator sets developed to meet the world's environmental protection requirements and the new market environment. Natural gas generator sets are mainly divided into two types, one is a combined cycle gas turbine and the other is a gas internal combustion engine. Gas turbines have relatively large power and are mainly used in large and medium-sized power stations, while gas internal combustion engines have relatively small power and are mainly used in small distributed power stations. It is a new type of green and environmentally friendly power to replace oil-fired and coal-fired units.

[0003] At present, in order to prevent excessive NOx from polluting the environment after combustion of gas engine sets, exhaust gas is usually denitrated. For example, the Chinese patent document with publication number CN211411627U, the patent name of a gas generator set exhaust denitration device, mentions "including a device body, the lower end of the device body is provided with a fixed base, one end of the device body is provided with an air intake mechanism, the other end of the device body is provided with an air collecting chamber, the inside of the device body is provided with a guide mechanism on the side close to the air intake mechanism, the inside of the device body is provided with a first SCR catalyst layer on the side close to the guide mechanism, and the inside of the device body is provided with a second SCR catalyst layer on the side close to the first SCR catalyst layer". This structure solves the problems of local failure of the SCR catalyst layer and poor sealing effect after long-term use, and improves its own denitration quality.

[0004] However, existing exhaust gas denitrification devices often include a backflow mechanism and a catalytic mechanism. The exhaust gas is dispersed through the backflow mechanism, and the dispersed exhaust gas is catalyzed by the catalytic mechanism, thereby achieving exhaust gas denitrification treatment. However, the maintenance and disassembly steps of the existing exhaust gas denitrification devices are complicated and require the use of a variety of auxiliary tools, which is time-consuming and laborious. In addition, the catalytic mechanism is mostly integrally connected to the inner wall of the shell, which is not convenient for replacing the catalytic mechanism. When the catalytic mechanism can no longer be used, it can only be replaced as a whole, which reduces the service life of the exhaust gas denitrification device.

[0005] Therefore, there is an urgent need for an exhaust gas denitrification device for a generator set to solve the above problems. Utility Model Content

[0006] Based on the above, the purpose of the utility model is to provide an exhaust gas denitrification device for a generator set to solve the problem that the maintenance and disassembly steps of the existing exhaust gas denitrification device are complicated, time-consuming and laborious, and the catalytic mechanism is mostly integrally connected to the inner wall of the shell, making it inconvenient to replace the catalytic mechanism.

[0007] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0008] The tail gas denitrification device for the generator set includes:

[0009] A housing, with an air inlet pipe and an exhaust pipe connected to both ends of the housing; a movable door is provided on the housing, and the movable door is provided on one side of the exhaust pipe;

[0010] A flow guiding mechanism, which is arranged in the housing and located on one side of the air intake pipe and is used for dispersing and guiding the exhaust gas;

[0011] A spray mechanism, the spray mechanism is arranged in the shell and located on one side of the guide mechanism, and is used for preliminary denitration of tail gas;

[0012] The catalytic mechanism comprises two groups of catalytic layers; the two groups of catalytic layers are arranged on one side of the spray mechanism; the catalytic layers and the outer shell are provided with quick-release components; the quick-release components comprise a fixing rod and a spring; the fixing rod is arranged on the outer shell, and one end of the fixing rod passes through the outer shell and extends into the catalytic layer; the spring is sleeved on the outer wall of the fixing rod and is located between the outer shell and the catalytic layer.

[0013] As a preferred solution for the exhaust gas denitrification device of a generator set, the fixing rod includes a limiting portion, a connecting portion and a clamping portion; the connecting portion and the outer shell are provided with a connecting hole, and the connecting portion is slidably connected to the connecting hole; one end of the connecting portion is connected to the clamping portion, and the other end is connected to the limiting portion.

[0014] As a preferred solution for the exhaust gas denitration device of the generator set, the clamping part and the catalytic layer member are provided with fixing holes, and the clamping part can enter or escape from the fixing hole; the spring is sleeved on the outer wall of the clamping part.

[0015] As a preferred solution for the exhaust gas denitrification device of the generator set, the guide mechanism includes a conical guide plate and a parallel guide plate; the conical guide plate is arranged on one side of the intake pipe for pre-dispersing and guiding the exhaust gas; the parallel guide plate is arranged on one side of the conical guide plate for further adjusting the guide direction of the exhaust gas.

[0016] As a preferred solution for the exhaust gas denitrification device of the generator set, the conical guide plate is provided with a plurality of groups of special-shaped guide grooves; the parallel guide plate is provided with a plurality of groups of equidistantly distributed parallel guide grooves; the special-shaped guide grooves are connected end to end with the parallel guide grooves.

[0017] As a preferred solution for the exhaust gas denitrification device of the generator set, the spray mechanism includes a liquid storage tank and a spray plate; the liquid storage tank is used on the outer shell for storing urea solution; the spray plate is arranged on the inner wall of the outer shell corresponding to the liquid storage tank, and the spray plate is connected to the liquid storage tank; the spray plate is provided with a plurality of groups of nozzles for spraying urea solution.

[0018] As a preferred solution for the exhaust gas denitrification device of the generator set, the spray mechanism also includes a liquid accumulation plate; the liquid accumulation plate is arranged in the shell and located below the spray plate, and is used for recovering the solution after spraying; the liquid accumulation plate is provided with a water outlet pipe.

[0019] As a preferred solution for the tail gas denitration device of the generator set, the spray mechanism also includes two groups of liquid baffles; the two groups of liquid baffles are arranged on both sides of the spray plate; and the liquid baffles are provided with a plurality of groups of equidistantly distributed air holes.

[0020] As a preferred solution for the exhaust denitrification device of the generator set, the casing is provided with a first monitoring component for temperature detection and a second monitoring component for nitrogen oxide detection; the first monitoring component and the second monitoring component are both arranged between the catalytic mechanism and the exhaust pipe.

[0021] The beneficial effects of the utility model are:

[0022] By setting up quick-release parts, when replacing the catalyst layer, the staff pulls out the fixing rod so that the fixing rod is detached from the side wall of the catalyst layer, and then the old catalyst layer can be taken out and the new catalyst layer can be put in, thereby realizing rapid replacement of the catalyst layer. At the same time, by setting up movable doors, the parts of the denitrification device can be maintained by opening the movable doors during daily maintenance, which simplifies the disassembly steps and improves the maintenance work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front structural schematic diagram of the exhaust gas denitration device for a generator set provided by the utility model;

[0024] Figure 2 A schematic diagram of the internal structure of the tail gas denitration device for a generator set provided by the utility model;

[0025] Figure 3 for Figure 2 A is an enlarged schematic diagram;

[0026] Figure 4 This is a schematic diagram of the overall structure of the liquid baffle provided by the utility model.

[0027] Among them, the reference numerals in the figure are:

[0028] 10. Shell; 11. Inlet pipe; 12. Exhaust pipe; 13. Movable door; 14. First monitoring component; 15. Second monitoring component; 20. Guide mechanism; 21. Conical guide plate; 211. Special-shaped guide groove; 22. Parallel guide plate; 221. Parallel guide groove; 30. Spray mechanism; 31. Liquid storage tank; 32. Spray plate; 321. Nozzle; 33. Liquid accumulation plate; 34. Water outlet pipe; 35. Liquid baffle plate; 351. Air vent; 41. Catalytic layer; 50. Quick-release component; 51. Fixing rod; 511. Limiting part; 512. Connecting part; 513. Clamping part; 52. Spring. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present utility model.

[0033] In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more than two. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] In one embodiment of the present invention, Figure 1-4 As shown, an exhaust gas denitration device for a generator set is provided, including a housing 10, a guide mechanism 20, a spray mechanism 30 and a catalytic mechanism. An intake pipe 11 and an exhaust pipe 12 are connected to both ends of the housing 10. A movable door 13 is provided on the housing 10, and the movable door 13 is provided on one side of the exhaust pipe 12. The guide mechanism 20 is provided in the housing 10 and is located on one side of the intake pipe 11, and is used for the dispersed flow guidance of the exhaust gas. The spray mechanism 30 is provided in the housing 10 and is located on one side of the guide mechanism 20, and is used for the preliminary denitration of the exhaust gas. The catalytic mechanism includes two groups of catalytic layers 41. Two groups of catalytic layers 41 are provided on one side of the spray mechanism 30. The catalytic layer 41 and the housing 10 are provided with a quick-release component 50. The quick-release component 50 includes a fixing rod 51 and a spring 52. The fixing rod 51 is provided on the housing 10, and one end of the fixing rod 51 passes through the housing 10 and extends into the catalytic layer 41. The spring 52 is sleeved on the outer wall of the fixing rod 51 and is located between the housing 10 and the catalyst layer 41 .

[0035] In this embodiment, the catalytic layer 41 contains catalysts of various ammonia substances. The exhaust gas is firstly denitrated by a solution sprayed by the spraying mechanism 30, and then denitrated in sequence by two groups of catalytic layers 41 to achieve exhaust gas purification, so that the exhaust gas meets the emission standards and is green and environmentally friendly.

[0036] By providing the quick-release component 50, when the catalyst layer 41 is replaced, the staff pulls out the fixing rod 51 so that the fixing rod 51 is detached from the side wall of the catalyst layer 41, and then the old catalyst layer 41 can be taken out and the new catalyst layer 41 can be put in, thereby realizing the quick replacement of the catalyst layer 41. At the same time, by providing the movable door 13, the parts of the denitrification device can be maintained by opening the movable door 13 during daily maintenance, thereby simplifying the disassembly steps and improving the maintenance work efficiency.

[0037] Preferably, the fixing rod 51 includes a limiting portion 511, a connecting portion 512 and a clamping portion 513. The connecting portion 512 and the outer shell 10 are provided with a connecting hole, and the connecting portion 512 is slidably connected to the connecting hole. One end of the connecting portion 512 is connected to the clamping portion 513, and the other end is connected to the limiting portion 511. The clamping portion 513 and the catalyst layer 41 are provided with a fixing hole, and the clamping portion 513 can enter or detach from the fixing hole. The spring 52 is sleeved on the outer wall of the clamping portion 513. When replacing the catalyst layer 41, the staff pulls the limiting portion 511 outward so that the clamping portion 513 is detached from the fixing block on the outer wall of the catalyst layer 41, and the old catalyst layer 41 can be taken out and the new catalyst layer 41 can be put in, so as to realize the rapid replacement of the catalyst layer 41. At the same time, the replaced catalyst layer 41 is re-clamped into the fixing hole through the clamping portion 513, thereby realizing the fixation of the catalyst layer 41.

[0038] Preferably, the guide mechanism 20 includes a conical guide plate 21 and a parallel guide plate 22. The conical guide plate 21 is arranged on one side of the intake pipe 11, and is used for pre-dispersing and guiding the exhaust gas. The parallel guide plate 22 is arranged on one side of the conical guide plate 21, and is used to further adjust the guide direction of the exhaust gas. A plurality of groups of special-shaped guide grooves 211 are arranged in the conical guide plate 21. A plurality of groups of parallel guide grooves 221 equidistantly distributed are arranged in the parallel guide plate 22. The special-shaped guide grooves 211 and the parallel guide grooves 221 are connected end to end. When the exhaust gas is discharged into the outer shell 10, the exhaust gas is pre-dispersed and guided by the special-shaped guide grooves 211 to avoid turbulence of the exhaust gas, and then the flow direction of the exhaust gas is further guided by the parallel guide grooves 221, so that the circulation of the exhaust gas is more stable and the denitrification efficiency is improved.

[0039] Preferably, the spray mechanism 30 includes a liquid storage tank 31 and a spray plate 32. The liquid storage tank 31 is used on the housing 10 for storing urea solution. The spray plate 32 is arranged on the inner wall of the housing 10 corresponding to the liquid storage tank 31, and the spray plate 32 is connected to the liquid storage tank 31. The spray plate 32 is provided with a plurality of groups of nozzles 321 for spraying urea solution. The urea solution is provided to the spray plate 32 through the liquid storage tank 31, and then the urea solution is sprayed through the nozzle 321, so that the urea solution contacts the exhaust gas, and the NOX in the exhaust gas is preliminarily desulfurized.

[0040] Furthermore, the spray mechanism 30 also includes a liquid accumulation plate 33. The liquid accumulation plate 33 is arranged in the housing 10 and below the spray plate 32, and is used to recover the solution after spraying. A water outlet pipe 34 is arranged on the liquid accumulation plate 33. By providing the liquid accumulation plate 33 and the water outlet pipe 34, the solution after spraying is conveniently discharged in time, and the corrosion phenomenon on the inner wall of the housing 10 caused by the long-term accumulation of the solution is avoided, thereby improving the service life of the denitration device.

[0041] Furthermore, the spray mechanism 30 further includes two groups of liquid baffles 35. The two groups of liquid baffles 35 are arranged on both sides of the spray plate 32. The liquid baffles 35 are provided with a plurality of groups of equally spaced air holes 351. By providing the liquid baffles 35, the sprayed solution is prevented from splashing on other components.

[0042] Preferably, a first monitoring component 14 for temperature detection and a second monitoring component 15 for nitrogen oxide detection are provided on the housing 10. The first monitoring component 14 and the second monitoring component 15 are both provided between the catalytic mechanism and the exhaust pipe 12. By providing the first monitoring component 14 and the second monitoring component 15, it is convenient for the staff to timely understand whether the treated exhaust gas meets the standards. At the same time, it is also convenient for the staff to timely adjust the denitration process of the exhaust gas according to the monitoring results, thereby improving the practicality of the denitration device.

[0043] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. A tail gas denitration device for a generator set, characterized in that: include: A housing, with an air inlet pipe and an exhaust pipe connected to both ends of the housing; a movable door is provided on the housing, and the movable door is provided on one side of the exhaust pipe; A flow guiding mechanism, which is arranged in the housing and located on one side of the air intake pipe and is used for dispersing and guiding the exhaust gas; A spray mechanism, the spray mechanism is arranged in the shell and located on one side of the guide mechanism, and is used for preliminary denitration of tail gas; The catalytic mechanism comprises two groups of catalytic layers; the two groups of catalytic layers are arranged on one side of the spray mechanism; the catalytic layers and the outer shell are provided with quick-release components; the quick-release components comprise a fixing rod and a spring; the fixing rod is arranged on the outer shell, and one end of the fixing rod passes through the outer shell and extends into the catalytic layer; the spring is sleeved on the outer wall of the fixing rod and is located between the outer shell and the catalytic layer.

2. The tail gas denitration device for a generator set according to claim 1, characterized in that: The fixing rod comprises a limiting portion, a connecting portion and a clamping portion; the connecting portion and the housing are provided with a connecting hole, and the connecting portion is slidably connected to the connecting hole; one end of the connecting portion is connected to the clamping portion, and the other end is connected to the limiting portion.

3. The tail gas denitration device for a generator set according to claim 2, characterized in that: The clamping part and the catalytic layer member are provided with fixing holes, and the clamping part can enter or escape from the fixing hole; the spring is sleeved on the outer wall of the clamping part.

4. The tail gas denitration device for a generator set according to any one of claims 1 to 3, characterized in that: The guide mechanism includes a conical guide plate and a parallel guide plate; the conical guide plate is arranged on one side of the intake pipe for pre-dispersing and guiding the exhaust gas; the parallel guide plate is arranged on one side of the conical guide plate for further adjusting the guide direction of the exhaust gas.

5. The tail gas denitration device for a generator set according to claim 4, characterized in that: The conical guide plate is provided with a plurality of groups of special-shaped guide grooves; the parallel guide plate is provided with a plurality of groups of parallel guide grooves distributed at equal intervals; the special-shaped guide grooves are connected end to end with the parallel guide grooves.

6. The tail gas denitration device for a generator set according to any one of claims 1 to 3, characterized in that: The spray mechanism includes a liquid storage tank and a spray plate; the liquid storage tank is used on the shell for storing urea solution; the spray plate is arranged on the inner wall of the shell corresponding to the liquid storage tank, and the spray plate is connected to the liquid storage tank; the spray plate is provided with a plurality of groups of nozzles for spraying urea solution.

7. The tail gas denitration device for a generator set according to claim 6, characterized in that: The spray mechanism further comprises a liquid accumulation plate; the liquid accumulation plate is arranged in the shell and below the spray plate, and is used for recovering the solution after spraying; a water outlet pipe is arranged on the liquid accumulation plate.

8. The tail gas denitration device for a generator set according to claim 7, characterized in that: The spray mechanism further comprises two groups of liquid baffles; the two groups of liquid baffles are arranged on both sides of the spray plate; and the liquid baffles are provided with a plurality of groups of equally spaced air holes.

9. The tail gas denitration device for a generator set according to any one of claims 1 to 3, characterized in that: The housing is provided with a first monitoring component for temperature detection and a second monitoring component for nitrogen oxide detection; the first monitoring component and the second monitoring component are both arranged between the catalytic mechanism and the exhaust pipe.

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