Resistance-reducing type tail gas purification and denitration device for biogas generator set

Abstract

The utility model discloses a resistance-reducing type tail gas purification and denitration device for a marsh gas generator set, a tail gas discharge pipeline of a container type marsh gas generator set is communicated with a vertical flaring type purification and denitration device, and the vertical flaring type purification and denitration device comprises an inlet flue, a flaring type purification and denitration device body and an outlet flue, the flaring type purification denitrator body comprises a flaring cone frustum shell, a cylinder shell and a necking cone frustum shell which are sequentially butted from the gas inlet end to the gas outlet end, and a conical fluid director is arranged in the flaring cone frustum shell; a rectifying grid, a primary flat plate type catalyst layer and a secondary flat plate type catalyst layer are sequentially arranged in the cylindrical shell at intervals in the flue gas flowing direction. The device is suitable for tail gas purification and denitration treatment of the container type biogas generator set, the tail gas flow speed is uniform, turbulence is not prone to occurring, smoke resistance is small, the flow speed is high, the treatment flow is larger, the purification and denitration efficiency is higher, and a guarantee is provided for maintaining the normal production order of biogas power generation.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable technical field, more particularly, relate to a kind of tail gas purification denitration device of resistance reduction type biogas generator set. BACKGROUND

[0002] Biogas power plant is the enterprise that collects domestic waste landfill gas and kitchen garbage, kitchen waste fermentation gas for power generation. With the expansion demand of project, reasonably carry out plant planning and design, on the basis of existing fixed building's plant type generator set, container type biogas generator set is built to meet the growing biogas power expansion demand, in turn, container type biogas generator set's tail gas purification denitration and emission problem is one of the main research topics currently facing, in the existing tail gas purification denitration treatment process, adopt honeycomb catalyst layer occupies large space, flue gas resistance is big, flow rate is slow, flow rate is not uniform, prone to turbulence, flue gas treatment flow is small, seriously affect purification denitration treatment efficiency, disturb biogas power normal production order. SUMMARY

[0003] The utility model in response to the prior art's insufficient, the technical problem to be solved is to provide a kind of tail gas purification denitration device of resistance reduction type biogas generator set, it is applicable to the tail gas purification denitration treatment of container type biogas generator set, overall structure occupies smaller space, tail gas flow rate is uniform, prone to turbulence, flue gas resistance is small, flow rate is fast, treatment flow is greater, purification denitration efficiency is higher, provide guarantee for maintaining biogas power normal production order.

[0004] The utility model is through the following technical scheme to make the above technical problem be solved.

[0005] Tail gas purification denitration device of resistance reduction type biogas generator set, the tail gas discharge pipeline of container type biogas generator set is connected with vertical flared type purification denitration ware, the vertical flared type purification denitration ware includes import flue, flared type purification denitration ware body and export flue, the flared type purification denitration ware body includes flared conical platform shell, cylindrical shell and necking conical platform shell in sequence by air inlet end to air outlet end butt joint, the flared conical platform shell is internally provided with conical flow director, the cylindrical shell is internally sequentially spaced apart with rectifier grid, primary flat plate type catalyst layer and secondary flat plate type catalyst layer along the flue gas flow direction, the primary flat plate type catalyst layer and the secondary flat plate type catalyst layer are all several catalyst layer board laminated structures, the catalyst layer board is wave-shaped board body structure and includes flat plate body and Z-shaped bending board body staggered splicing into one, the catalyst layer board board thickness is 0.45mm to 1.2mm, the catalyst layer board flow direction of primary flat plate type catalyst layer and flue gas flow direction are 50 degrees to 90 degrees, the catalyst layer board flow direction of secondary flat plate type catalyst layer and flue gas flow direction are 90 degrees to 130 degrees.

[0006] As preferred, the conical flow guide is a coaxial and spaced sleeve structure of several conical tubes.

[0007] As preferred, the container type biogas generator set is an open type screw expander generator set.

[0008] As preferred, the spacing distance between the conical flow guide and the rectification grid is one eighth to one fourth of the length of the cylindrical shell.

[0009] As preferred, the spacing distance between the rectification grid and the primary flat plate type catalyst layer is one fifteenth to one sixth of the length of the cylindrical shell.

[0010] As preferred, the catalyst layer plate is a stainless steel porous plate coated with a platinum catalyst on the surface of a titanium dioxide carrier.

[0011] As preferred, the inlet flue, the flared type purification denitrator body and the outlet flue are made of stainless steel.

[0012] As preferred, the outlet flue is sequentially connected with a stainless steel corrugated pipe, a flue gas silencer and an exhaust chimney.

[0013] The utility model discloses the beneficial effects of:

[0014] 1. The primary and secondary flat plate type catalyst layers with special laminated structure are optimized to replace the original honeycomb type catalyst layer, save space, effectively reduce the flue gas resistance, the flue gas flow rate is faster, the treatment flow is larger, guarantee the high efficient denitration efficiency, and help the flue gas to realize the purification discharge, energy saving and environmental protection.

[0015] 2. The catalyst layer plate structure is optimized to be a wave-shaped plate body, which is formed by interlaced splicing of flat plate bodies and Z-shaped bent plate bodies, the catalyst layer plate thickness is 0.45mm to 1.2mm, the structural strength is higher, the flue gas contact area is increased and the flow guide effect is achieved, the flow guide direction of the catalyst layer plate of the primary flat plate type catalyst layer is 50 degrees to 90 degrees to the flue gas flow direction, the flow guide direction of the catalyst layer plate of the secondary flat plate type catalyst layer is 90 degrees to 130 degrees to the flue gas flow direction, the flue gas flow direction is changed, which helps to increase the contact area and improve the denitration efficiency, and provides guarantee for maintaining the normal production of long-period biogas power generation.

[0016] 3. By optimizing the body structure of the flared-mouth purification and denitrification unit into a flared truncated cone shell, a cylindrical shell, and a constricted truncated cone shell, and adding a conical guide inside the flared truncated cone shell, the exhaust gas from the exhaust pipe is pre-dispersed and guided, making the exhaust gas velocity more uniform and effectively avoiding turbulence. After being rectified by the rectifier grid, the exhaust gas flow direction is further adjusted, and the uniformity of the exhaust gas flow velocity distribution is improved. This helps to improve the denitrification efficiency while increasing the processing flow rate, achieving efficient purification and denitrification treatment. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings required in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the catalyst layer structure according to an embodiment of this application;

[0020] In the diagram: 1-Vertical flared-mouth purification and denitrification unit, 2-Inlet flue, 3-Flamed-mouth purification and denitrification unit body, 4-Outlet flue, 5-Flamed truncated cone shell, 6-Cylindrical shell, 7-Constricted truncated cone shell, 8-Conical guide, 9-Rectifying grid, 10-Primary flat plate catalyst layer, 11-Secondary flat plate catalyst layer, 12-Catalyst plate, 13-Flat plate body, 14-Z-shaped bent plate body. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model have been clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0023] like Figure 1 As shown in the figure, the exhaust gas purification and denitrification device of the reduced resistance biogas generator set in this embodiment of the utility model is an open screw expander generator set.

[0024] The tail gas exhaust pipeline of the container type biogas generator set is communicated with a vertical flared type purification denitration device 1, which comprises an inlet flue 2, a flared type purification denitration device body 3 and an outlet flue 4, wherein the inlet flue 2, the flared type purification denitration device body 3 and the outlet flue 4 are made of stainless steel.

[0025] The flared type purification denitration device body 3 comprises a flared conical frustum shell 5, a cylindrical shell 6 and a contracted conical frustum shell 7 which are sequentially connected in sequence from the gas inlet end to the gas outlet end, wherein the flared conical frustum shell 5 is internally provided with a conical flow director 8 which is further coaxially and spacedly sleeved by a plurality of conical tubes.

[0026] The cylindrical shell 6 is internally sequentially and spacedly provided with a flow regulating grid 9, a primary flat plate type catalyst layer 10 and a secondary flat plate type catalyst layer 11 along the flue gas flow direction.

[0027] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A drag-reducing biogas generator set exhaust gas purification and denitrification device, characterized by: The tail gas exhaust pipeline of the container type biogas generator set is communicated with a vertical flared type purification denitrator (1), the vertical flared type purification denitrator (1) comprises an inlet flue (2), a flared type purification denitrator body (3) and an outlet flue (4), the flared type purification denitrator body (3) comprises a flared conical frustum shell (5), a cylindrical shell (6) and a contracted conical frustum shell (7) which are sequentially butted from the gas inlet end to the gas outlet end, the flared conical frustum shell (5) is internally provided with a conical flow director (8), the cylindrical shell (6) is internally sequentially and spacedly provided with a rectifying grid (9), a primary flat plate type catalyst layer (10) and a secondary flat plate type catalyst layer (11) along the flue gas flow direction, the primary flat plate type catalyst layer (10) and the secondary flat plate type catalyst layer (11) are both internally of a laminated structure of a plurality of catalyst layer plates (12), the catalyst layer plate (12) is a corrugated plate body structure and comprises a flat plate body (13) and a Z-shaped bent plate body (14) which are staggered and spliced into one body, the catalyst layer plate (12) has a plate thickness of 0.45mm to 1.2mm, the flow direction of the catalyst layer plate (12) of the primary flat plate type catalyst layer (10) is 50 degrees to 90 degrees to the flue gas flow direction, and the flow direction of the catalyst layer plate (12) of the secondary flat plate type catalyst layer (11) is 90 degrees to 130 degrees to the flue gas flow direction.

2. The device according to claim 1, characterized in that it is a device for reducing the emission of NOx from the exhaust gas of a biogas generator set of the reduced resistance type. The conical flow director (8) is a coaxial and spaced sleeve structure of a plurality of conical tubes.

3. The device according to claim 1, characterized in that it is a device for reducing the emission of NOx from the exhaust gas of a biogas generator set. The container type biogas generator set is an open type screw expander generator set.

4. The device according to claim 1, characterized in that it is a device for reducing the emission of NOx from the exhaust gas of a biogas generator set. The spacing distance between the conical flow director (8) and the rectifying grid (9) is one eighth to one fourth of the length of the cylindrical shell (6).

5. The device according to claim 1, characterized in that it is a device for reducing the emission of NOx from biogas generators with reduced resistance. The spacing distance between the rectifying grid (9) and the primary flat plate type catalyst layer (10) is one fifteenth to one sixth of the length of the cylindrical shell (6).

6. The device according to claim 1, characterized in that: The catalyst layer plate (12) is a stainless steel porous plate coated with a titanium dioxide carrier surface loaded platinum catalyst.

7. The device according to claim 1, characterized in that it is a device for reducing the emission of NOx from biogas generators with reduced resistance. The inlet flue (2), the flared type purification denitrator body (3) and the outlet flue (4) are of stainless steel material structure.

8. The device according to claim 1, characterized in that it is a device for reducing the emission of NOx from biogas generators with reduced resistance. The outlet flue (4) is sequentially butted with a stainless steel corrugated pipe, a flue gas silencer and an exhaust chimney.

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