CN-121977361-A - Tail gas treatment device for sintering furnace

CN121977361ACN 121977361 ACN121977361 ACN 121977361ACN-121977361-A

Abstract

The application discloses a tail gas treatment device for a sintering furnace, which relates to the technical field of sintering furnace tail gas treatment, is particularly suitable for tail gas purification of a vacuum sintering furnace in the Metal Injection Molding (MIM) industry, aims at solving the problems of high filtration resistance, high maintenance cost, prominent fire risk and energy consumption waste in the existing sintering furnace tail gas treatment, integrates a tail gas inlet structure, a reciprocating tail gas flow channel structure, a heat insulation structure, a heating part, an integrated filter element structure with a built-in double-group catalyst and a PLC control part through the design of 'catalytic decomposition and structure optimization', and is matched with an operation mode of 'one-to-one correspondence of the device and the sintering furnace', so that harmless direct exhaust of the tail gas is realized, and meanwhile, the maintenance period of the device is prolonged to 24 months through prolonging the gas residence time and simplifying the detachable sealing connection of flanges, and the comprehensive energy consumption is reduced by 30% -50% compared with the prior art, so that the industry point is thoroughly solved.

Inventors

HAN SHANDONG
DAI CHUNCHAO
Feng Zhizhe

Assignees

苏州兆鑫驰智能科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260130

Claims (10)

1. The tail gas treatment device for the sintering furnace is characterized by comprising a tail gas inlet structure for connecting the tail gas of the sintering furnace, a tail gas flow passage structure for guiding gas to flow, a heat preservation structure for maintaining the internal reaction temperature of the device, an appearance supporting structure serving as an external support, a heating part for heating the gas in the tail gas flow passage structure, an integrated filter element structure with a built-in catalyst, a tail gas outlet structure for discharging the treated gas, a compressed air inlet structure for connecting compressed air, a temperature detection part for detecting the temperature of the gas and a control part for regulating and controlling the operation state of the heating part; The inner side of the appearance supporting structure is provided with the heat insulation structure, and the tail gas flow passage structure is arranged on the inner side of the heat insulation structure; The tail gas inlet structure is communicated with one end of the tail gas flow channel structure, and the other end of the tail gas flow channel structure is communicated with the tail gas outlet structure after sequentially passing through the heating component and the integrated filter element structure; The compressed air inlet structure is arranged at one side of the tail gas flow passage structure, which is close to the tail gas inlet structure; at least two groups of catalysts are arranged in the integrated filter element structure, and the integrated filter element structure is in sealing fit with the tail gas flow passage structure; the detection end of the temperature detection component stretches into a region, close to the heating component, in the tail gas flow passage structure, the signal output end of the temperature detection component is electrically connected with the control component, and the control component is electrically connected with the heating component.
2. The tail gas treatment device for the sintering furnace according to claim 1, wherein the tail gas treatment devices are arranged in one-to-one correspondence with the sintering furnace, and the starting-up number of the tail gas treatment devices is consistent with the actual starting-up number of the sintering furnace.
3. The exhaust gas treatment device for a sintering furnace according to claim 1, wherein the catalyst in the integrated filter element structure is a honeycomb carrier, and the two groups of catalysts are sequentially arranged along the flow direction of the mixed gas.
4. A tail gas treatment device for a sintering furnace as claimed in claim 3 wherein the support of the integrated cartridge structure is honeycomb cordierite or honeycomb alumina.
5. The tail gas treatment device for a sintering furnace according to claim 1, wherein the heating component is an electric heating pipe, and the control component regulates the heating temperature of the heating component to be in a range of 200-400 ℃.
6. The tail gas treatment device for the sintering furnace according to claim 1, wherein the heat insulation structure is made of aluminum silicate fiber cotton, the thickness of the heat insulation structure is 40-60mm, and the heat conductivity coefficient of the heat insulation structure is less than or equal to 0.03 。
7. The tail gas treatment device for the sintering furnace according to claim 1, wherein the compressed air inlet structure is provided with a flow regulating component, and the flow regulating component is used for regulating the air inflow of the compressed air so as to control the volume fraction of the oxygen content of the mixed gas in the tail gas flow channel structure to be 15% -22%.
8. The tail gas treatment device for the sintering furnace according to claim 1, wherein the control part is a PLC controller, and the PLC controller receives the temperature signal transmitted by the temperature detecting part and dynamically adjusts the heating power of the heating part according to the signal.
9. The tail gas treatment device for a sintering furnace according to claim 1, wherein the tail gas flow channel structure is a reciprocating bending structure, the reciprocating bending structure comprises at least two bending sections, and the extending directions of adjacent bending sections are opposite to each other so as to prolong the residence time of the mixed gas in the tail gas flow channel structure.
10. The tail gas treatment device for the sintering furnace according to claim 1, wherein the integrated filter element structure is detachably and hermetically connected with the tail gas flow channel structure through a flange structure, a high-temperature-resistant sealing gasket is arranged between the joint surfaces of the flange structure, and the high-temperature-resistant sealing gasket is made of graphite or polytetrafluoroethylene.

Description

Tail gas treatment device for sintering furnace Technical Field The invention relates to the technical field of sintering furnace tail gas treatment, in particular to a tail gas treatment device for a sintering furnace. Background In the production process of a sintering furnace (particularly a vacuum sintering furnace), the volatilization of organic matters (such as a binder) in the furnace and the operation of a vacuum pump can generate mixed tail gas containing oil stains, CH compounds, NO compounds and CO, and the existing tail gas treatment mode generally adopts a traditional filter element filtering and a large-power pumping device shared by a plurality of devices, so that the defects that the following cannot be overcome are overcome: 1. The problems of incomplete equipment burden and filtration are that when the tail gas passes through the filter element, oil stains and tiny particles are easy to block the pores of the filter element, so that the airflow resistance is obviously increased, the operation load of the vacuum pump is directly increased, and overload faults of the vacuum pump are easy to be caused after long-term use; 2. The maintenance cost is high, namely, oil stains and organic matters remained in the pipeline are required to be frequently disassembled and cleaned, the filter element replacement period is only 3-4 months, a large amount of labor is consumed, and filter element consumables are required to be continuously purchased, so that the maintenance cost of enterprises is high; 3. The problem of outstanding safety risk is that oil stains and organic matters accumulated in a pipeline belong to inflammable substances, spontaneous combustion is easy to occur under the influence of high-temperature environment of a sintering furnace, fire accidents occur due to the residual accumulation in the existing MIM factory, and the production safety is seriously threatened; 4. The problem of serious energy waste is that a set of high-power tail gas suction device is shared by a plurality of sintering furnaces in the prior art, no matter a single sintering furnace or a few sintering furnaces are started, the whole set of high-power device is started, so that the equipment is in an idle or low-load running state for a long time, the energy waste is serious, and the national energy-saving production policy is not met. Aiming at the core defects of the prior art, a sintering furnace tail gas treatment scheme which meets the environmental protection standards, has low maintenance, high safety and energy conservation is needed to fill the technical blank of the industry. Disclosure of Invention The invention aims to overcome the defects of the existing sintering furnace tail gas treatment technology, and provides a novel tail gas treatment device for a sintering furnace, which realizes efficient catalytic decomposition of tail gas, low maintenance cost and low energy consumption and meets the dual requirements of environmental protection, direct discharge and safe production. In order to solve the technical problems, the invention adopts the following technical scheme: a tail gas treatment device for a sintering furnace comprises a tail gas inlet structure for connecting the tail gas of the sintering furnace, a tail gas flow passage structure for guiding gas to flow, a heat preservation structure for maintaining the reaction temperature inside the device, an appearance support structure serving as an external support, a heating part for heating the gas in the tail gas flow passage structure, an integrated filter element structure with a built-in catalyst, a tail gas outlet structure for discharging the treated gas, a compressed air inlet structure for connecting compressed air, a temperature detection part for detecting the temperature of the gas, and a control part for regulating the operation state of the heating part; The inner side of the appearance supporting structure is provided with the heat insulation structure, and the tail gas flow passage structure is arranged on the inner side of the heat insulation structure; The tail gas inlet structure is communicated with one end of the tail gas flow channel structure, and the other end of the tail gas flow channel structure is communicated with the tail gas outlet structure after sequentially passing through the heating component and the integrated filter element structure; The compressed air inlet structure is arranged at one side of the tail gas flow passage structure, which is close to the tail gas inlet structure; at least two groups of catalysts are arranged in the integrated filter element structure, and the integrated filter element structure is in sealing fit with the tail gas flow passage structure; the detection end of the temperature detection component stretches into a region, close to the heating component, in the tail gas flow passage structure, the signal output end of the temperature detection component is electrically connected wit