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CN-122006466-A - Gas SCR denitration catalyst module

CN122006466ACN 122006466 ACN122006466 ACN 122006466ACN-122006466-A

Abstract

The invention relates to the technical field of denitration catalyst modules, in particular to a gas flue gas SCR denitration catalyst module which comprises a structural frame with square tube channels, wherein two ends of each square tube channel are respectively an air inlet end and an air outlet end, a transverse member and a vertical member, a plurality of transverse members and vertical members are alternately connected at a right angle of 90 degrees to form a continuous rectangular corrugated catalytic unit module, the catalytic unit module is arranged in the square tube channels and is jointly enclosed with the square tube channels to form a plurality of parallel longitudinal main channels, and transverse channels are arranged between any two adjacent longitudinal main channels.

Inventors

  • SHI ZHANLIANG
  • WANG CHUNFENG

Assignees

  • 凯莱微升(北京)科技有限公司

Dates

Publication Date
20260512
Application Date
20260324

Claims (8)

  1. 1. The fuel gas flue gas SCR denitration catalyst module is characterized by comprising: the structure frame (1) is provided with a square tube channel, and two ends of the square tube channel are respectively an air inlet end and an air outlet end; The transverse members (2) and the vertical members (3), and a plurality of the transverse members (2) and the vertical members (3) are alternately connected at a right angle of 90 degrees to form a continuous rectangular wave-shaped catalytic unit module; The catalytic unit module is arranged in the square pipe channel and is enclosed together with the square pipe channel to form a plurality of longitudinal main channels which are arranged in parallel, and transverse channels are arranged between any two adjacent longitudinal main channels.
  2. 2. The gas flue gas SCR denitration catalyst module as set forth in claim 1, wherein the transverse member (2) is a transverse catalyst plate, the vertical member (3) is a vertical catalyst plate, and the aperture of the transverse member (2) is smaller than the aperture of the vertical member (3).
  3. 3. The fuel gas flue gas SCR denitration catalyst module according to claim 1, wherein a guide groove (8) is formed in the inner top of the structural frame (1), an assembly block (7) is arranged in the guide groove (8) in a limiting sliding manner, the sliding path of the assembly block (7) is consistent with the path direction of the longitudinal main channel, and the bottom of the assembly block (7) is fixedly connected with the top of the transverse member (2); The assembly blocks (7) can slide along the extending direction of the longitudinal main channel, so that the transverse member (2) moves to a preset alternative position; When the cross member (2) slides to an alternate position, the configuration of the adjacent two longitudinal main channels switches back to the original 180 ° rotated symmetrical state.
  4. 4. The fuel gas SCR denitration catalyst module according to claim 3, wherein a traction channel is pre-arranged at the inner top of the structural frame (1), a second pull rope (9) is pre-arranged in the traction channel, one end of the second pull rope (9) is fixedly connected with the outer wall of the assembly block (7) after U-shaped rotation, the outer wall of the structural frame (1) penetrates through and slides with a first pull rope (6), one end of the first pull rope (6) stretches into the guide groove (8) and is fixedly connected with the outer wall of the assembly block (7), and the first pull rope (6) and the second pull rope (9) can be both associated with an external winch so as to control the sliding and locking of the assembly block (7).
  5. 5. The gas SCR denitration catalyst module as set forth in claim 3, wherein the detection member comprises a reaction carrier which can be fixedly installed in the longitudinal main channel, the reaction carrier is provided with a proximity structure, the proximity structure can move towards the inside of the pore canal of the vertical member (3) under the action of an external structure, the proximity structure comprises a linkage column (12), the linkage column (12) is of a columnar structure, the front end of the linkage column (12) is provided with a plurality of probes (14), the probes (14) are distributed in a circumferential array, and the probes (14) can extend into the pore canal of the vertical member (3).
  6. 6. The fuel gas SCR denitration catalyst module as set forth in claim 5, wherein the reaction carrier comprises a mounting plate (15), a plurality of column grooves are formed in the mounting plate (15), a pressure sensor (11) is fixedly arranged at the inner bottom of each column groove, the approaching structure is slidably arranged in each column groove, and a functional spring (13) is fixedly arranged between the bottom of each linkage column (12) and the pressure surface of each pressure sensor (11).
  7. 7. The fuel gas SCR denitration catalyst module as set forth in claim 5, wherein the reaction carrier comprises an assembly cylinder (16), a plurality of embedded grooves are formed in the assembly cylinder (16) along the diameter of the assembly cylinder, the linkage column (12) is slidably assembled in the embedded grooves, damping inner sleeves (17) for limiting displacement of the linkage column (12) are arranged in the embedded grooves, PVDF piezoelectric film wrapped sensors (18) are arranged in the assembly cylinder (16) along the axis of the assembly cylinder, and annular outer walls of the PVDF piezoelectric film wrapped sensors (18) are pressure surfaces.
  8. 8. The fuel gas SCR denitration catalyst module as set forth in any one of claims 1 to 7, wherein a right angle notch is reserved at the joint between the transverse member (2) and the vertical member (3), an angle iron filling strip (4) is installed at the right angle notch, one right angle outer wall of the angle iron filling strip (4) is fixedly connected with the outer wall of the end part of the vertical member (3), the other right angle outer wall of the angle iron filling strip (4) is tightly attached to the outer wall of the transverse member (2), two ends of the inclined surface outer wall of the angle iron filling strip (4) are respectively connected with the outer walls of the transverse member (2) and the vertical member (3) to form a guide inclined surface, and a heat-resistant sealing sleeve (5) is wrapped at the right angle outer wall of the angle iron filling strip (4).

Description

Gas SCR denitration catalyst module Technical Field The invention relates to the technical field of denitration catalyst modules, in particular to a fuel gas SCR denitration catalyst module. Background With the continuous improvement of the duty ratio of a gas turbine and a gas boiler in an electric power system, particularly the wide application of a peak shaving unit, the requirements on a flue gas denitration system are increasingly strict, the selective catalytic reduction technology is the most mature and efficient denitration means at present, the core component of the selective catalytic reduction technology is an SCR catalyst, the existing SCR catalyst is mainly divided into three major types of honeycomb type, flat type and corrugated type, the honeycomb type catalyst pore canal is mainly a square or regular polygon honeycomb channel, the corrugated type catalyst pore canal is approximately a unimodal waveform pore canal, the plate type catalyst is a long and narrow rectangular pore canal, the flue gas passing through the catalyst mainly flows along the axial direction, the axial flow leads to short contact time between the gas and the wall surface of the catalyst, the mass transfer efficiency is low, and the denitration efficiency of the catalyst needs to be stabilized to be more than 90% or even higher under the condition of high flue gas flow speed or fluctuation, so that the ultra-low emission requirements of the state on NOx are met, and the consumption of the catalyst needs to be increased, thereby leading to the rapid increase of the pressure loss of the catalyst. At present, the flue gas flowing through the honeycomb type, flat plate type and corrugated plate type catalyst modules still mainly flows in a single axial direction, effective transverse mixing is lacked, concentration gradient in a catalyst pore canal is obvious, front-end reaction is severe, and the rear end is underutilized, so that the effective utilization rate of the whole catalyst is low, the service life is shortened, and the ammonia escape risk is increased. Under the conditions that a gas peak shaver set is frequently started and stopped and the load greatly fluctuates, the conventional module is difficult to simultaneously realize high denitration efficiency and low system pressure loss, and the technical defects that firstly, a gas flow path is single, the transverse diffusion capability is weak, the effective utilization rate of a catalyst is low and is usually only 60 to 75 percent, secondly, the loading of the catalyst is required to be increased or the flow rate of flue gas is increased to ensure the denitration efficiency, the pressure drop of the system is obviously increased and is usually more than 800 to 1200Pa, induced air energy is increased, finally, lateral mixing is insufficient at low load and low flow rate, the denitration efficiency is obviously reduced, and the pressure drop exceeds standard at high load, so that the safe operation of the unit is influenced. Disclosure of Invention The invention provides a fuel gas SCR denitration catalyst module, which is characterized in that a convection channel is constructed through a continuous rectangular wave structure, so that the pressure loss is remarkably reduced, a convection and side flow combination mode is formed by using the aperture or thickness difference, and the peak regulation working condition can be adapted by using the switching of a longitudinal main channel. In order to achieve the above object, the present invention provides the following technical solutions: a gas SCR denitration catalyst module, comprising: the device comprises a structural frame with square tube channels, a transverse member and a vertical member, wherein two ends of each square tube channel are respectively provided with an air inlet end and an air outlet end, the transverse member and the vertical member are alternately connected at a right angle of 90 degrees to form a continuous rectangular wave-shaped catalytic unit module, the catalytic unit module is arranged in each square tube channel and is enclosed with the square tube channels to form a plurality of parallel longitudinal main channels, and the transverse channels are formed between any two adjacent longitudinal main channels. Optionally, the cross member is a cross catalyst plate, the catalyst plate may be any one of a honeycomb type, a flat plate type and a corrugated plate type, the vertical member is a vertical catalyst plate, the catalyst plate may be any one of a honeycomb type, a flat plate type and a corrugated plate type, and the aperture of the cross member is smaller than or equal to the aperture of the vertical member or the thickness of the cross member is larger than or equal to the thickness of the vertical member. Optionally, a guide groove is formed in the inner top of the structural frame, an assembly block is mounted in the guide groove in a limiting sliding manner, the sliding path of the