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CN-121988162-A - Collaborative driving type deep purification waste gas treatment system

CN121988162ACN 121988162 ACN121988162 ACN 121988162ACN-121988162-A

Abstract

The invention provides a collaborative driving type deep purification waste gas treatment system which comprises a steady flow and safety interlocking unit, a collaborative pretreatment unit, a deep purification unit and an up-to-standard emission and on-line monitoring unit which are sequentially communicated, wherein the steady flow and safety interlocking unit comprises a steady flow buffer box, a variable frequency induced draft fan, a combustible gas concentration detector, an oxygen content detector and a temperature and humidity detector which are arranged on an air inlet side, the collaborative pretreatment unit comprises a cyclone coarse separator, a backflushing condensation demister assembly, a dew point tracking condenser, an oil-water separation tank and a high-efficiency demister which are sequentially communicated, and a condensate outlet of the dew point tracking condenser is communicated with the oil-water separation tank.

Inventors

  • WANG YINMU
  • JI YUNYUN

Assignees

  • 苏州优矿塑新材料股份有限公司

Dates

Publication Date
20260508
Application Date
20260327

Claims (10)

  1. 1. The cooperative driving type deep purification waste gas treatment system is characterized by comprising a steady flow and safety interlocking unit, a cooperative pretreatment unit, a deep purification unit and a standard discharge and on-line monitoring unit which are sequentially communicated; The steady flow and safety interlocking unit comprises a steady flow buffer box, a variable frequency induced draft fan, a combustible gas concentration detector, an oxygen content detector and a temperature and humidity detector, wherein the combustible gas concentration detector, the oxygen content detector and the temperature and humidity detector are arranged on the air inlet side; the collaborative pretreatment unit comprises a cyclone coarse separator, a backflushing condensation demisting assembly, a dew point tracking condenser, an oil-water separation tank and a high-efficiency demister which are sequentially communicated, wherein a condensate outlet of the dew point tracking condenser is communicated with the oil-water separation tank; the deep purification unit comprises at least two catalytic adsorption modules which are arranged in parallel and can be alternately positioned in an adsorption working condition and a regeneration working condition, a valve group and a regeneration branch communicated with the catalytic adsorption modules in the regeneration working condition; Each catalytic adsorption module comprises a conductive honeycomb framework, an adsorption layer arranged on the surface of the conductive honeycomb framework, a catalytic layer arranged on the adsorption layer, a partition temperature measuring element and an in-situ electric heating regeneration assembly, wherein the in-situ electric heating regeneration assembly comprises a busbar arranged at two ends of the conductive honeycomb framework and is connected with a power supply so as to electrify and heat the conductive honeycomb framework for regeneration; The regeneration branch comprises a regeneration fan, an oxygen limiting device, a regeneration tail gas polishing catalyst and a return pipeline, wherein the regeneration fan is used for providing regeneration gas for the catalytic adsorption module under a regeneration working condition, and an outlet of the regeneration tail gas polishing catalyst is communicated with the upstream of the main air duct or the inlet side of the variable-frequency induced draft fan through the return pipeline, so that the regeneration tail gas flows back to the main air duct after being polished.
  2. 2. The collaborative driving type deep purification waste gas treatment system according to claim 1, wherein the condensing medium of the backflushing condensing demisting component is metal fiber sintered felt, folded wave stainless steel wire mesh or the combination thereof, a backflushing interface and a pulse valve are arranged, and pulse backflushing is triggered when the pressure difference between two ends of the backflushing condensing demisting component reaches a preset threshold value.
  3. 3. The collaborative driving type deep purification exhaust gas treatment system according to claim 1, wherein the dew point tracking condenser is controlled by calculating an inlet dew point temperature according to a temperature and humidity detector And condensing the outlet temperature The temperature is controlled within the range of-2 ℃ to 8 ℃ so that the water vapor and the condensable organic components enter the oil-water separation tank after being condensed in a controlled manner.
  4. 4. The co-driven deep purification exhaust gas treatment system according to claim 1, wherein the oil-water separation tank comprises a liquid inlet diffusion baffle, a sloping plate or a coalescence-separation zone, and an overflow weir or a compartment structure for reducing liquid inlet disturbance and achieving oil-water phase separation.
  5. 5. The co-driven deep purification exhaust gas treatment system of claim 1, wherein the high efficiency mist eliminator is a wire mesh mist eliminator structure, a baffled mist eliminator structure or a composite structure of the two to reduce entrained droplet content entering the deep purification unit.
  6. 6. The collaborative driving type deep purification exhaust gas treatment system according to claim 1, wherein the conductive honeycomb skeleton is a metal honeycomb skeleton or a conductive carbon fiber corrugated laminated skeleton, and the adsorption layer is any one of or a combination of an activated carbon fiber felt layer, a modified activated carbon coating layer and a molecular sieve composite coating layer.
  7. 7. The co-driven deep purification exhaust gas treatment system according to claim 1, wherein the partition temperature measuring element is provided with at least three points of an inlet, a middle part and an outlet along the air flow direction, and the power supply adjusts the power to the conductive honeycomb skeleton according to the temperature feedback of the partition temperature measuring element so as to suppress hot spots and control the regeneration temperature.
  8. 8. The co-driven deep purification exhaust gas treatment system according to claim 1, wherein the flow of the regeneration gas output by the regeneration fan is 5% -15% of the treatment air volume of the main air duct, and the oxygen limiting device is used for limiting the oxygen content entering the catalytic adsorption module under the regeneration working condition within a preset safety range.
  9. 9. The co-driven type deep purification exhaust gas treatment system as claimed in claim 1, wherein the regeneration exhaust gas polishing catalyst is a honeycomb oxidation catalyst for further oxidizing the incompletely oxidized components and carbon monoxide in the regeneration exhaust gas, and a check valve is arranged on the return pipe to prevent the main air duct gas from flowing backward to the regeneration branch.
  10. 10. The co-driven deep purification exhaust gas treatment system according to claim 1, wherein the steady flow and safety interlock unit further comprises a safety controller, the safety controller being interlocked with a power source; and when the detected value of the combustible gas concentration detector exceeds a preset threshold value and the detected value of the oxygen content detector exceeds a preset threshold value, prohibiting starting or immediately stopping the electrified heating of the in-situ electric heating regeneration assembly.

Description

Collaborative driving type deep purification waste gas treatment system Technical Field The invention relates to the field of waste gas treatment, in particular to a cooperative driving type deep purification waste gas treatment system. Background In the industrial processes of coating, printing, rubber processing, heat treatment, oil processing, fine chemical engineering and the like, composite waste gas containing volatile organic compounds, oil mist, water vapor and part of high-boiling-point condensable organic components is often generated. The waste gas has complex components and large fluctuation of working conditions, and particularly when the humidity is higher, the temperature change is obvious or oil mist particles are entrained, the long-term stable operation is difficult to realize by adopting a conventional single purification process. For example, when the exhaust gas is directly sent to an adsorption device, a catalytic purification device or other advanced treatment equipment, water vapor and condensable components in the exhaust gas are easy to condense in the equipment, and oil mist and viscous substances are also easy to adhere to the surfaces of a filler, a filter material or a catalytic layer, so that channel blockage, pressure difference increase, adsorption performance reduction and catalytic layer deactivation are caused, and the purification efficiency of the system is reduced, frequent maintenance and poor operation stability are caused. On the other hand, when the existing adsorption waste gas treatment system is used for treating waste gas with high humidity, high oil mist or condensable components, the adsorption capacity is usually recovered by stopping the whole bed for replacement, performing off-line thermal regeneration or externally connecting regeneration treatment equipment. The method not only has discontinuous regeneration process and affects the continuous operation of the main system, but also can bring secondary emission risk if the high-concentration organic waste gas released in the regeneration process is improperly treated, and increases the energy consumption and the operation cost of the system. Accordingly, there is a need to provide a new co-driven type deep purification exhaust gas treatment system that solves the above-mentioned problems. Disclosure of Invention In order to solve the technical problems, the invention provides a collaborative driving type deep purification waste gas treatment system, which solves the problem that the prior art lacks a waste gas treatment system capable of preventing condensation at the front end, preventing adhesion and blocking and continuously and deeply purifying the rear end. The cooperative driving type deep purification waste gas treatment system provided by the invention comprises a steady flow and safety interlocking unit, a cooperative pretreatment unit, a deep purification unit and an up-to-standard emission and on-line monitoring unit which are sequentially communicated; The steady flow and safety interlocking unit comprises a steady flow buffer box, a variable frequency induced draft fan, a combustible gas concentration detector, an oxygen content detector and a temperature and humidity detector, wherein the combustible gas concentration detector, the oxygen content detector and the temperature and humidity detector are arranged on the air inlet side; the collaborative pretreatment unit comprises a cyclone coarse separator, a backflushing condensation demisting assembly, a dew point tracking condenser, an oil-water separation tank and a high-efficiency demister which are sequentially communicated, wherein a condensate outlet of the dew point tracking condenser is communicated with the oil-water separation tank; the deep purification unit comprises at least two catalytic adsorption modules which are arranged in parallel and can be alternately positioned in an adsorption working condition and a regeneration working condition, a valve group and a regeneration branch communicated with the catalytic adsorption modules in the regeneration working condition; Each catalytic adsorption module comprises a conductive honeycomb framework, an adsorption layer arranged on the surface of the conductive honeycomb framework, a catalytic layer arranged on the adsorption layer, a partition temperature measuring element and an in-situ electric heating regeneration assembly, wherein the in-situ electric heating regeneration assembly comprises a busbar arranged at two ends of the conductive honeycomb framework and is connected with a power supply so as to electrify and heat the conductive honeycomb framework for regeneration; The regeneration branch comprises a regeneration fan, an oxygen limiting device, a regeneration tail gas polishing catalyst and a return pipeline, wherein the regeneration fan is used for providing regeneration gas for the catalytic adsorption module under a regeneration working condition, and an outlet of the