CN104096450A - Efficient rotating wheel adsorption device for waste gas treatment - Google Patents
Efficient rotating wheel adsorption device for waste gas treatment Download PDFInfo
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- CN104096450A CN104096450A CN201310119434.9A CN201310119434A CN104096450A CN 104096450 A CN104096450 A CN 104096450A CN 201310119434 A CN201310119434 A CN 201310119434A CN 104096450 A CN104096450 A CN 104096450A
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Abstract
The invention relates to a waste gas treatment device using rotating wheel adsorption combustion treatment method for decomposition, and provides an efficient rotating wheel adsorption device for waste gas treatment. The device includes a rotating wheel adsorption device and a catalytic combustion reactor; a rotating wheel zone of the rotating wheel adsorption device is divided into four separate operation zones, an adsorption operation zone, a preheating operation zone, a desorption operation zone and a precooling operation zone; and the combustion reactor is a thermal incinerator or a catalytic combustion reactor. The rotating wheel adsorption device is characterized in that exhaust gas from the desorption zone enters into the catalytic combustion reactor, and then after the reaction enters into the preheating zone for preheating the rotating wheel; part of the exhaust gas from the preheating zone is mixed with the exhaust gas from the precooling zone, and the mixed gas enters into the desorption zone for desorption. The invention employs coupling design of rotating wheel adsorption process and the combustion reactor, so as to simplify the process and improve the efficiency of energy use.
Description
Technical field
The present invention relates to a kind of exhaust gas purification device, particularly relate to a kind of emission-control equipment that adopts runner absorption burn processing method to decompose.
Background technology
The discharge of industry stationary source VOCs is mainly the emission pollution problem of low concentration, Wind Volume.The improvement technology of current VOCs mainly contains two classes: a class is recovery technology, and a class is destroy technology.Use at present the improvement technology of more VOCs to mainly contain the destroy technologies such as recovery technology and directly burning, catalytic combustion such as active carbon and carbon fiber adsorption and catalytic combustion, solvent absorption, cooling condensation, wherein in the majority with the application of adsorption technology and catalytic combustion technology again.
Adsorption Concentration catalytic combustion technology is a kind of integrated technology that adsorption technology and catalytic combustion are combined, the organic exhaust gas of Wind Volume, low concentration is converted to the organic exhaust gas of little air quantity, high concentration through absorption/desorption process, then purify by catalytic combustion, can effectively utilize the organic combustion heat, be suitable for the unsettled waste gas pollution control and treatment of Wind Volume, low concentration or concentration.Workflow is by organic exhaust gas charcoal absorption, when approaching shut-down operation when saturated, then in the other direction, organic matter from active carbon desorption under is made to regenerating active carbon with thermal current at it.The organic matter being concentrated of desorption is delivered to catalytic combustion reactor and is changed into the discharge of the inorganic matter such as CO2 and H2O.When organic exhaust gas is through the concentrated 2000PPM that reaches when above, organic exhaust gas can maintain spontaneous combustion in catalytic bed, does not need external heat.A tail gas part after catalytic combustion enters atmosphere, and major part is sent to adsorbent bed, for the desorption and regeneration of active carbon.Can meet like this burning and the required heat energy of desorption, reach energy-conservation object.
Adsorbent equipment will carry out desorption and regeneration processing after absorption is saturated, and traditional Adsorption Concentration-catalytic combustion system need to arrange two or more absorbers to be switched, respectively in adsorption and desorption process, and flow process complexity.Runner type adsorption system is a kind of on-line regeneration operating system continuously, by sorbent-loaded on the cylindrical runner of honeycomb substrates, runner is divided between adsorption and desorption and cooling three operating spaces, utilize suction, the desorption program of adsorption-desorption-concentrated three continuous alternating temperatures, making low concentration, Wind Volume organic waste gas concentrating is the concentrated gas of high concentration, low discharge, is applicable to the waste gas of processing large flow, low concentration, containing multiple organic principle.Workflow is: wheel rotates with certain speed, and when the organic exhaust gas of low concentration enters adsorption zone, organic matter is adsorbed by the adsorbent on runner, after purification, can directly discharge; In the time that runner enters desorption district, purge with high-temperature gas, by the organic matter high temperature desorption that is adsorbed in wheel surface adsorbent out, adsorbent is reproduced; The contained organic relative concentration of desorption gas is higher, is admitted to and in flame combustion stove or catalytic combustion reactor, carries out combustion decomposition.The pressure drop that zeolite runner absorption VOCs produces is extremely low, can greatly reduce electric power energy consumption; Cycles of concentration reaches 5～30 times, the specification of greatly dwindling equipment for after-treatment, and operating cost is lower.
Traditional runner adsorption system, normally adsorbs at 30～50 DEG C, adsorbs and enters the regeneration of desorption district after saturated.Desorption manipulation is with the air (or waste gas) of high temperature (120～250 DEG C) the desorption district that flows through, and utilizes high temperature to be adsorbed in organic matter desorption on adsorbent out.In order to improve operating efficiency, the error of adsorption temp and desorption temperature is controlled between 60～150 DEG C conventionally, therefore very large at the adsorption zone of runner and the border temperature difference in desorption district.Runner, in the time just entering desorption district from adsorption zone, does not usually reach the desorption temperature of setting, and desorption rate is very low.Further, because the time of staying in desorption district is shorter, the temperature of runner usually distribution portion is even, very high in the entrance location temperature of high temperature desorption air, and lower in its exit position temperature, can make again to be adsorbed by runner because temperature reduces near exit position by the organic matter of desorption.
Chinese patent " lifting wheel formula adsorption system is removed the method for volatile organic waste gas efficiency " (99109004.7) proposes to increase the design between a preheating zone between runner adsorption and desorption operating space, utilize warm-up cycle to change the Temperature Distribution in desorption district, to improve desorption efficiency, make the high efficient rotor formula absorption processing system of absorption, preheating, desorption, cooling formation one continued operation.This scheme is divided into runner between absorption, preheating, desorption, cooling four operating spaces, and the gas temperature that carries of its preheating zone is 60～120 DEG C, and the gas that carries of preheating zone directly imports desorption district, or imports desorption district after heat exchanger again.
Conventionally, the organic exhaust gas of the higher concentration of discharging from desorption district also will be admitted to heating power incinerator or catalytic combustion reactor, carries out combustion decomposition processing, and its reaction temperature is generally 250～600 DEG C.The EGT of heating power incinerator or catalytic combustion reactor outlet is very high, is directly discharged as can not be effectively utilized, can forming energy waste.On the other hand, make it reach desorption temperature in order to heat runner, also will heat by heat exchanger the air (waste gas) that enters desorption district.Runner absorption-combustion decomposition between aforementioned four operating spaces is processed the flow process of organic exhaust gas, and, by runner adsorption process and combustion reactor Coupling Design, the energy is not made full use of efficiently.
Summary of the invention
The problem to be solved in the present invention is by a kind of new runner absorption-combustion decomposition system design scheme is provided, by runner adsorption process and combustion reactor Coupling Design, and can simple flow, efficiency of energy utilization is very high.
A kind of high efficient rotor absorption emission-control equipment, is characterized in that:
(1) described high efficient rotor adsoption catalysis burning exhaust gas process device comprises rotary-type absorber and combustion reactor;
(2) runner of described rotary-type absorber is divided into absorption, heating, desorption, cooling four operating spaces that mutually isolate;
(3) the discharge gas in desorption district enters combustion reactor, enters the thermal treatment zone runner is heated after reaction.
In order further to improve efficiency of energy utilization, a part for thermal treatment zone discharge gas is mixed with cooling zone discharge gas, enters desorption district and carries out desorption.That is to say, sweep gas (waste gas, air, nitrogen or inert gas) enter cooling zone cooling to runner after, mix with a part for the discharge gas of the thermal treatment zone, enter desorption district and carry out desorption.
In order further to improve efficiency of energy utilization, desorption district discharged gas before entering combustion reactor, discharges gas (or a part for gas is discharged in the thermal treatment zone) carry out heat exchange by heat exchanger with the thermal treatment zone.
Combustion reactor in high efficient rotor absorption emission-control equipment is heating power incinerator or catalytic combustion reactor.
Rotary-type absorber in high efficient rotor absorption emission-control equipment, included areal extent between angle angle 180～315 degree that the area of its adsorption zone is opened for two radius centered by runner shaft, included areal extent between angle angle 15～90 degree that the area in desorption district is opened for two radius centered by runner shaft, included areal extent between angle angle 15～60 degree that the area of the thermal treatment zone and cooling zone is opened for two radius centered by runner shaft.
With reference to appended accompanying drawing, and the explanation of following embodiment, be appreciated that object of the present invention, feature and effect.
Brief description of the drawings
Figure 1 shows that the schematic diagram of the each functional areas of rotary-type absorber.
Figure 2 shows that the flow chart of the first high efficient rotor absorption emission-control equipment.
Figure 3 shows that the flow chart of the second high efficient rotor absorption emission-control equipment.
Figure 4 shows that the flow chart of the third high efficient rotor absorption emission-control equipment.
In figure: A is runner adsorption zone, H is the runner thermal treatment zone, and D is runner desorption district, and C is runner cooling zone, and R is combustion reactor, and HE is heat exchanger.Ain is the air inlet of runner adsorption zone, and Aout is the exhaust of runner adsorption zone, and Hout is the exhaust of the runner thermal treatment zone, Din is the district's air inlet of runner desorption, and Dout is the district's exhaust of runner desorption, and Cin is the air inlet of runner cooling zone, Cout is the exhaust of runner cooling zone, and Rout is combustion reactor exhaust.
Detailed description of the invention
Embodiment mono-:
A kind of high efficient rotor absorption emission-control equipment, comprises rotary-type absorber and combustion reactor (R).
As shown in Figure 1, according to the direction of runner rotation, the runner of described rotary-type absorber is divided into four adjacent operating spaces: runner adsorption zone (A), the runner thermal treatment zone (H), runner desorption district (D) and runner cooling zone (C).As shown in Figure 2, the discharge gas Dout in runner desorption district (D) enters combustion reactor (R), and reacted reactor exhaust Rout enters the runner thermal treatment zone (H) runner is heated.
Rotary-type absorber in the present embodiment, included areal extent between angle angle 180～315 degree that the area of its adsorption zone is opened for two radius centered by runner shaft, included areal extent between angle angle 15～90 degree that the area in desorption district is opened for two radius centered by runner shaft, included areal extent between angle angle 15～60 degree that the area of the thermal treatment zone and cooling zone is opened for two radius centered by runner shaft.
Described combustion reactor is a kind of heating power incinerator, and incineration temperature is 500～1000 DEG C.
Embodiment bis-:
A kind of high efficient rotor absorption emission-control equipment, comprises rotary-type absorber and combustion reactor (R).
As shown in Figure 1, according to the direction of runner rotation, the runner of described rotary-type absorber is divided into four adjacent operating spaces: runner adsorption zone (A), the runner thermal treatment zone (H), runner desorption district (D) and runner cooling zone (C).Described combustion reactor (R) is a kind of catalytic combustion reactor, and its reaction temperature is 250～600 DEG C.
The pending waste gas Ain containing low-concentration organic enters runner adsorption zone (A), and organic matter contained in waste gas is adsorbed by the adsorbent on runner, thereby is cleaned, can directly discharge, or further purified treatment.The operating temperature of runner adsorption zone (A) is 30～60 DEG C, and the waste gas Ain that enters runner adsorption zone (A) determines by process conditions, but generally also should process to the temperature that approaches adsorption conditions, to improve adsorption efficiency.
Runner cooling zone (C) is for the high temperature runner dish shifting out from runner desorption district (D) is cooled to and approaches runner adsorption temp, to improve adsorption efficiency.Purge gas Cin for cooling runner cooling zone (C) is a part for pending waste gas, and its temperature is identical with the pending waste gas Ain temperature that enters runner adsorption zone (A); Purge gas Cin can be also air, or nitrogen, or inert gas, and its temperature is normal temperature.The purge gas Cin of lower temperature enters runner cooling zone (C), by cooling the runner dish of high temperature, after purge gas is heated, discharges from runner cooling zone (C).
As shown in Figure 3, the Exhaust Gas Cout of runner cooling zone (C), mixes with a part of Hout2 of the discharge gas Hout of the runner thermal treatment zone (H), enters runner desorption district (D) and carries out desorption.The operating temperature in runner desorption district (D) is 120～200 DEG C, and the temperature of the gas Din being mixed by Cout and Hout2 is higher than the operating temperature in runner desorption district (D) or approaching with it, to improve desorption efficiency.
The discharge gas Dout in runner desorption district (D) enters catalytic combustion reactor (R), reacted reactor exhaust Rout enters the runner thermal treatment zone (H) runner is heated, the low temperature runner dish shifting out from runner adsorption zone (A) is heated to approach runner desorption temperature, to improve desorption efficiency.
Rotary-type absorber in the present embodiment, included areal extent between angle angle 300 degree that the area of its adsorption zone is opened for two radius centered by runner shaft, included areal extent between angle angle 30 degree that the area in desorption district is opened for two radius centered by runner shaft, included areal extent between angle angle 15 degree that the area of the thermal treatment zone and cooling zone is opened for two radius centered by runner shaft.
Embodiment tri-:
A kind of high efficient rotor absorption emission-control equipment, comprises rotary-type absorber and combustion reactor (R).
As shown in Figure 1, according to the direction of runner rotation, the runner of described rotary-type absorber is divided into four adjacent operating spaces: runner adsorption zone (A), the runner thermal treatment zone (H), runner desorption district (D) and runner cooling zone (C).Described combustion reactor (R) is a kind of catalytic combustion reactor, and its reaction temperature is 300～450 DEG C.
The pending waste gas Ain containing low-concentration organic enters runner adsorption zone (A), and organic matter contained in waste gas is adsorbed by the adsorbent on runner, thereby is cleaned, can directly discharge, or further purified treatment.
Runner cooling zone (C) is for the high temperature runner dish shifting out from runner desorption district (D) is cooled to and approaches runner adsorption temp, to improve adsorption efficiency.Purge gas Cin for cooling runner cooling zone (C) is a part for pending waste gas, and its temperature is identical with the pending waste gas Ain temperature that enters runner adsorption zone (A).The purge gas Cin of lower temperature enters runner cooling zone (C), by cooling the runner dish of high temperature, after purge gas is heated, discharges from runner cooling zone (C).
As shown in Figure 4, the Exhaust Gas Cout of runner cooling zone (C), mixes with a part of Hout2 of the discharge gas Hout of the runner thermal treatment zone (H), enters runner desorption district (D) and carries out desorption.
The discharge gas Dout in runner desorption district (D) is entering combustion reactor (R) before, carry out heat exchange with another part Hout1 of the discharge gas Hout of the runner thermal treatment zone (H) by heat exchanger (HE), to reclaim heat.After over-heat-exchanger (HE), Dout enters catalytic combustion reactor (R) reaction, reacted reactor exhaust Rout enters the runner thermal treatment zone (H) runner is heated, the low temperature runner dish shifting out from runner adsorption zone (A) is heated to approach runner desorption temperature, to improve desorption efficiency.
Rotary-type absorber in the present embodiment, included areal extent between angle angle 300 degree that the area of its adsorption zone is opened for two radius centered by runner shaft, included areal extent between angle angle 30 degree that the area in desorption district is opened for two radius centered by runner shaft, included areal extent between angle angle 15 degree that the area of the thermal treatment zone and cooling zone is opened for two radius centered by runner shaft.
The present embodiment is for certain printing and dyeing waste gas treatment process.The flow of discharging waste gas is about 10000m3/h, and temperature is 30～45 DEG C, and the concentration that contains the volatile organic solvents such as acetone, ethylene glycol, toluene changes between 600～1000ppm.The major part (about 9500m3/h) of discharging waste gas is sent into runner adsorption zone (A), and adsorption temp is 30～45 DEG C, and the waste gas after adsorption cleaning is through smoke stack emission.Through gas chromatographic detection, the concentration that contains volatile organic matter in the waste gas after purified treatment is less than 50ppm, reaches emission request.The fraction Cin (about 500m3/h) of discharging waste gas sends into runner cooling zone (C) runner dish is cooled to below 60 DEG C from desorption temperature (150～180 DEG C), and the temperature that runner cooling zone (C) discharges gas Cout is about 60～90 DEG C.The Exhaust Gas Cout of runner cooling zone (C), mix with a part of Hout2 (about 500m3/h) of the discharge gas Hout of the runner thermal treatment zone (H), enter runner desorption district (D) and carry out desorption, desorption temperature is 150～180 DEG C.The temperature of gaseous mixture Din is about 180～200 DEG C, and flow is about 1000m3/h.The discharge gas Dout temperature in runner desorption district (D) is 150～180 DEG C, and the concentration of contained volatile organic matter can reach 5000～12000ppm after testing.The discharge gas Dout in runner desorption district (D) enters heat exchanger (HE) and carries out heat exchange, is heated to 180～200 DEG C, then enters catalytic combustion reactor (R) reaction.The reaction temperature of catalytic combustion reactor (R) is about 300～450 DEG C, and the temperature of reaction end gas Rout is about 300～450 DEG C, and the concentration of contained volatile organic matter is less than 100ppm.Reacted reaction end gas Rout enters the runner thermal treatment zone (H) to runner heating, and low temperature runner dish is heated to more than 120 DEG C from adsorption temp (30～45 DEG C).As previously mentioned, a part of Hout2 (about 500m3/h) of the discharge gas Hout of the runner thermal treatment zone (H), enters runner desorption district (D) after mixing carry out desorption with the Exhaust Gas Cout of runner cooling zone (C); Another part Hout1 (about 500m3/h) of the discharge gas Hout of the runner thermal treatment zone (H), enters heat exchanger (HE) and carries out heat exchange recovery heat, after being cooled, discharges.Conventionally, this discharge gas Hout1 is admitted to chimney with together with waste gas Aout through adsorption cleaning, can realize qualified discharge.
Runner absorption-combustion decomposition system design scheme provided by the present invention, by runner adsorption process and combustion reactor Coupling Design, can simple flow, efficiency of energy utilization is very high.
Claims (5)
1. a high efficient rotor absorption emission-control equipment, is characterized in that:
(1) described high efficient rotor absorption emission-control equipment comprises rotary-type absorber and combustion reactor;
(2) runner of described rotary-type absorber is divided between absorption, heating, desorption, cooling four operating spaces that mutually isolate;
(3) desorption district discharges gas and enters combustion reactor, enters the thermal treatment zone runner is heated after reaction.
2. high efficient rotor absorption emission-control equipment according to claim 1, is characterized in that, a part for thermal treatment zone discharge gas is mixed with cooling zone discharge gas, enters desorption district and carries out desorption.
3. high efficient rotor absorption emission-control equipment according to claim 2, is characterized in that, desorption district discharged gas before entering combustion reactor, discharges gas carry out heat exchange by heat exchanger with thermal treatment zone discharge gas or a part of thermal treatment zone.
4. high efficient rotor absorption emission-control equipment according to claim 1, is characterized in that, described combustion reactor is heating power incinerator or catalytic combustion reactor.
5. high efficient rotor absorption emission-control equipment according to claim 1, it is characterized in that, included areal extent between angle angle 180～315 degree that the area of the adsorption zone of described rotary-type absorber is opened for two radius centered by runner shaft, included areal extent between angle angle 15～90 degree that the area in desorption district is opened for two radius centered by runner shaft, included areal extent between angle angle 15～60 degree that the area of the thermal treatment zone and cooling zone is opened for two radius centered by runner shaft.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289203A (en) * | 2015-11-10 | 2016-02-03 | 信利（惠州）智能显示有限公司 | Gas molecular pollutant heat treatment unit |
| CN105749700A (en) * | 2016-04-08 | 2016-07-13 | 长春工业大学 | Novel continuous cylinder type volatile organic compound absorbing method |
| CN108854442A (en) * | 2017-05-10 | 2018-11-23 | 新盛Eng株式会社 | Volatile organic compounds removes system |
| CN109701358A (en) * | 2019-02-25 | 2019-05-03 | 广州键洋环保科技有限公司 | A kind of organic exhaust gas adsorption and catalysis burning combined system and its technique |
| CN110465159A (en) * | 2019-07-25 | 2019-11-19 | 江苏苏净集团有限公司 | A kind of processing exhaust gas adsorption runner device |
| CN110902748A (en) * | 2019-12-03 | 2020-03-24 | 陈德全 | Organic wastewater treatment method |
| TWI694226B (en) * | 2019-01-21 | 2020-05-21 | 華懋科技股份有限公司 | Direct combustion return high-efficiency organic waste gas treatment system and method |
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2013
- 2013-04-07 CN CN201310119434.9A patent/CN104096450A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289203A (en) * | 2015-11-10 | 2016-02-03 | 信利（惠州）智能显示有限公司 | Gas molecular pollutant heat treatment unit |
| CN105749700A (en) * | 2016-04-08 | 2016-07-13 | 长春工业大学 | Novel continuous cylinder type volatile organic compound absorbing method |
| CN108854442A (en) * | 2017-05-10 | 2018-11-23 | 新盛Eng株式会社 | Volatile organic compounds removes system |
| TWI694226B (en) * | 2019-01-21 | 2020-05-21 | 華懋科技股份有限公司 | Direct combustion return high-efficiency organic waste gas treatment system and method |
| CN109701358A (en) * | 2019-02-25 | 2019-05-03 | 广州键洋环保科技有限公司 | A kind of organic exhaust gas adsorption and catalysis burning combined system and its technique |
| CN109701358B (en) * | 2019-02-25 | 2024-02-13 | 广州键洋环保科技有限公司 | Organic waste gas adsorption and catalytic combustion combined system and process thereof |
| CN110465159A (en) * | 2019-07-25 | 2019-11-19 | 江苏苏净集团有限公司 | A kind of processing exhaust gas adsorption runner device |
| CN110902748A (en) * | 2019-12-03 | 2020-03-24 | 陈德全 | Organic wastewater treatment method |
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Application publication date: 20141015 |