CN211159105U - Waste gas treatment system for sludge treatment - Google Patents
Waste gas treatment system for sludge treatment Download PDFInfo
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- CN211159105U CN211159105U CN201921714410.7U CN201921714410U CN211159105U CN 211159105 U CN211159105 U CN 211159105U CN 201921714410 U CN201921714410 U CN 201921714410U CN 211159105 U CN211159105 U CN 211159105U
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Abstract
The utility model discloses a waste gas treatment system for sludge treatment, including cyclone, first scrubbing tower, second scrubbing tower, draught fan and the chimney that communicates in proper order cyclone with add the tail gas precooling system between the first scrubbing tower the second scrubbing tower with add the tail gas heat treatment system between the draught fan. The utility model discloses operating stability is strong, effectively decomposes poisonous and harmful gas, prevents that the organic matter in the flue gas from discharging and exceeds standard, and is energy-concerving and environment-protective, friendly to the environment.
Description
Technical Field
The utility model relates to a sludge treatment technical field specifically relates to a waste gas treatment system for sludge treatment.
Background
With the development of the paper industry and the construction of pollution prevention and control facilities, sludge generated after the paper-making wastewater is treated by treatment facilities becomes a new pollution source, and the pollution source is continuously increased along with the expansion of the production scale of the paper-making industry. At present, two treatment methods are mainly used, the first method is direct landfill, and the direct landfill not only needs a landfill site, but also pollutes the environment; the second method is to dehydrate the sludge, mix the sludge with coal and send the mixture to a boiler for combustion. The tail gas after the treatment of sludge pyrolysis carbonization furnace contains a large amount of pollutants, mainly includes smoke and dust, acid gas etc. and the processing of tail gas among the sludge pyrolysis carbonization process among the prior art mainly has dust removal, deacidification step, directly discharges after the processing, but the tail gas that comes out in the pyrolysis carbonization furnace still contains toxic and harmful gas such as VOCs, dioxin, and the direct discharge can pollute all ring edge borders.
Disclosure of Invention
The utility model aims at solving the prior art not enough and an operating stability is strong that provides, effectively decomposes poisonous and harmful gas, prevents that the organic matter in the flue gas from discharging and exceeds standard, to the environment-friendly exhaust-gas treatment equipment who is used for sludge treatment.
The utility model discloses an adopt following technical solution to realize above-mentioned purpose:
a waste gas treatment system for sludge treatment comprises a cyclone dust removal device, a first washing tower, a second washing tower, an induced draft fan and a chimney which are sequentially communicated, and is characterized in that a tail gas precooling system is additionally arranged between the cyclone dust removal device and the first washing tower, and a tail gas heat treatment system is additionally arranged between the second washing tower and the induced draft fan, wherein the tail gas precooling system comprises a spray room, a cooling tower and a return pipe which is communicated with the spray room and the cooling tower, and the tail gas heat treatment system comprises a heat accumulating type combustion furnace, an active carbon spray machine and a cloth bag dust remover which are sequentially communicated;
the spraying device comprises a driving motor, a rotating shaft and a plurality of layers of spraying supports, wherein the spraying supports are uniformly arranged along the circumferential direction of the rotating shaft, the rotating shaft is a hollow circular tube and is communicated with the spraying supports, and the tail ends of the spraying supports are connected with a plurality of spray heads;
the regenerative combustion furnace comprises a furnace body, an air inlet pipe connected with an input end of the furnace body, and an air outlet pipe connected with an output end of the furnace body, wherein an air inlet chamber, a combustion chamber and an air outlet chamber which are formed by heat accumulators at intervals are arranged in the furnace body, the air inlet chamber is communicated with the combustion chamber through an air exchange valve, and the air outlet chamber is communicated with the combustion chamber through an air exchange valve.
As a further explanation of the above scheme, an output shaft of the driving motor is fixedly connected with a driving gear, one end of the rotating shaft is provided with a driven gear engaged with the driving gear, and the driving motor drives the rotating shaft to rotate.
Furthermore, one end of the rotating shaft penetrating through the spray chamber is fixedly connected with a bearing, and the input end of the return pipe is communicated with the rotating shaft through the bearing.
Furthermore, the number of layers of the spraying supports is at least two, the number of the spraying supports in each layer is at least one, and the projections of the spraying supports in each layer, which are positioned at one end of the rotating shaft, on the horizontal plane are not coincident.
Further, intake pipe one end is provided with first fan, first fan air intake intercommunication has the gas mixing case, the gas mixing case input communicates respectively has tail gas induced duct, gas pipe and air hose.
Furthermore, a partition board is arranged in the gas mixing box, and the partition boards are arranged in a staggered mode from top to bottom to form an S-shaped airflow channel.
Further, the lateral wall of the combustion chamber is provided with a temperature sensor, and an intermittent over-temperature gas discharge port is arranged above the combustion chamber.
Further, the heat accumulator is any one of a heat accumulation brick or a honeycomb ceramic heat accumulator.
Furthermore, a high-efficiency demister is arranged in front of the input end of the heat accumulating type combustion furnace, and demisting is carried out on flue gas exhausted from the washing tower.
Furthermore, a volatile organic compound online monitoring system is arranged in the chimney, so that the emission condition of pollutants in the flue gas can be monitored at any time.
The utility model adopts the beneficial effect that above-mentioned technical solution can reach is:
1. the utility model discloses carry out strict processing to the tail gas that comes out behind the pyrolysis carbonization of sludge, first process is cyclone, detach the large granule smoke and dust in the tail gas, second process is cooling and dual scrubbing tower, detach the acid gas in the tail gas, third process is heat accumulation formula combustion furnace, effectively decompose poisonous harmful gas such as dioxin in the tail gas, fourth process is active carbon spray set, carry out the poisonous harmful substance of deep adsorption, discharge through sack dust shaker and chimney at last, tail gas treatment process scientific and reasonable, effectively prevent the polluted environment.
2. The utility model discloses a be provided with the rotatory spray set by motor drive in tail gas precooling system's spray room, from the top spray exhaust high-temperature gas in the cyclone dust collector, not only further strengthen the disturbance contact between rivers and the gas, effectively fall to safe temperature with high-temperature gas, prevent that high temperature from damaging follow-up treatment facility, cooling water in the system recycles, energy-concerving and environment-protective moreover.
3. The utility model discloses a set up air inlet chamber, combustion chamber and the play air chamber that forms by the heat accumulator interval in the heat accumulation formula combustion furnace in tail gas heat treatment system, the heat of storing plays the preheating action to the tail gas that lets in the heat accumulator of air inlet chamber, and the tail gas after preheating need not to provide too much fuel and can accomplish the oxidation, makes VOCs, twoCompletely converting organic substances such as dioxin and the like into harmless CO2And H2O, reduced energy consumption, the room of giving vent to anger simultaneously plays the cushioning effect on the one hand, prevents that the high-temperature high-pressure gas in the stove from high-speed blowout and damaging the outlet duct, and on the other hand carbon dioxide of high temperature and vapor are all through the heat accumulator when giving vent to anger, and the heat of organic matter in the tail gas is retrieved to the heat accumulator, reduces the temperature of giving vent to anger.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the tail gas precooling system provided by the present invention.
Fig. 3 is a schematic structural view of the shower chamber in fig. 2.
Fig. 4 is an enlarged view of detail a of fig. 3.
Fig. 5 is a schematic structural view of a regenerative combustion furnace according to the present invention.
Fig. 6 is a schematic structural view of the gas mixing box in fig. 5.
Description of reference numerals: i, a tail gas precooling system, II, a tail gas heat treatment system, 1, a cyclone dust removal device, 2, a first washing tower, 3, a second washing tower, 4, a draught fan, 5, a chimney, 6, a spray chamber, 6-1, an air inlet, 6-2, an air outlet, 6-3, a spray device, 6-3-1, a driving motor, 6-3-2, a rotating shaft, 6-3-3, a spray bracket, 6-3-4, a spray head, 6-3-5, a driving gear, 6-3-6, a driven gear, 7, a cooling tower, 8, a return pipe, 9, a heat accumulating type combustion furnace, 9-1, a furnace body, 9-2, an air inlet pipe, 9-3, an air outlet pipe, 9-4, a heat accumulator, 9-5, an air inlet chamber, 9-6 and a combustion chamber, 9-6-1 parts of temperature sensor, 9-6-2 parts of over-temperature gas discharge port, 9-7 parts of gas outlet chamber, 9-8 parts of air exchange valve, 9-9 parts of first fan, 9-10 parts of air mixing box, 9-10-1 parts of partition board, 9-11 parts of tail gas induced duct, 9-12 parts of gas pipe, 9-13 parts of air pipe, 10 parts of active carbon spraying machine, 11 parts of cloth bag dust remover.
Detailed Description
The technical solution is described in detail with reference to specific embodiments below.
As shown in fig. 1, the utility model relates to a waste gas treatment system for sludge treatment, including cyclone 1, first scrubbing tower 2, second scrubbing tower 3, draught fan 4 and chimney 5 that communicate in proper order, add tail gas precooling system I between cyclone 1 with first scrubbing tower 2, add tail gas heat treatment system II between second scrubbing tower 3 and draught fan 4, wherein tail gas precooling system I includes spray room 6, cooling tower 7 and the back flow 8 that communicates spray room 6 with cooling tower 7, tail gas heat treatment system II includes heat accumulation formula combustion furnace 9, active carbon spray machine 10 and bag dust shaker 11 that communicate in proper order;
as shown in fig. 2-3, an air inlet 6-1 is arranged at the lower part of the side wall of the spray chamber 6, an air outlet 6-2 is arranged at the upper part of the side wall, a spray device 6-3 is arranged in the spray chamber along the vertical direction, the spray device comprises a driving motor 6-3-1, a rotating shaft 6-3-2 and a multi-layer spray support 6-3-3, wherein the spray support 6-3-3 is uniformly arranged along the circumferential direction of the rotating shaft 6-3-2, the rotating shaft 6-3-2 is a hollow circular tube and is communicated with the spray support 6-3-3, and the tail end of the spray support 6-3-3 is connected with a plurality of spray heads 6-3-4;
as shown in fig. 5, the regenerative combustion furnace 9 includes a furnace body 9-1, an inlet pipe 9-2 connected to an input end of the furnace body, and an outlet pipe 9-3 connected to an output end of the furnace body, wherein the furnace body 9-1 is provided therein with an inlet chamber 9-5, a combustion chamber 9-6 and an outlet chamber 9-7 which are partitioned by a heat accumulator 9-4, wherein the inlet chamber 9-5 is communicated with the combustion chamber 9-6 through an air exchange valve 9-8, and the outlet chamber 9-7 is communicated with the combustion chamber 9-6 through an air exchange valve 9-8.
As shown in fig. 4, an output shaft of the driving motor 6-3-1 is fixedly connected with a driving gear 6-3-5, one end of the rotating shaft 6-3-2 is provided with a driven gear 6-3-6 engaged with the driving gear, and the driving motor drives the rotating shaft to rotate; one end of the rotating shaft 6-3-2 penetrating through the spray chamber 6 is fixedly connected with a bearing, and the input end of the return pipe 8 is communicated with the rotating shaft through the bearing.
As shown in fig. 5-6, one end of the air inlet pipe 9-2 is provided with a first fan 9-9, an air inlet of the first fan is communicated with a gas mixing tank 9-10, and an input end of the gas mixing tank is respectively communicated with a tail gas induced duct 9-11, a gas pipe 9-12 and an air pipe 9-13; the inside of the gas mixing box 9-10 is provided with a partition plate 9-10-1, the partition plates are arranged in a staggered manner from top to bottom to form an S-shaped gas flow channel, and when tail gas, fuel gas and air flow through the S-shaped gas flow channel, the gas is fully mixed; the side wall of the combustion chamber 9-6 is provided with a temperature sensor 9-6-1, and an intermittent overtemperature gas discharge port 9-6-2 is arranged above the combustion chamber.
In the practical application process, the temperature of tail gas discharged from the pyrolysis carbonization furnace is about 200-300 ℃, the temperature of the flue gas is high, the fluctuation is large, and the water content is high, so that the cyclone dust removal device is selected to pre-remove dust from the flue gas, the dust removal efficiency is 85-90%, and dust particles with the particle size larger than 5mm can be effectively collected.
The temperature of the flue gas after pre-dedusting is about 200 ℃, then the flue gas is sent into a tail gas pre-cooling system for pre-cooling, the temperature of the high-temperature tail gas is reduced from 200 ℃ to 60 ℃, saturated vapor contained in the high-temperature tail gas is condensed and separated out, the separated water flows into a return pipe along with cooling water, the heat exchange between the cooling water and the flue gas is completed, the temperature of the flue gas is reduced, the temperature of the cooling water is increased, and in order to ensure the pre-cooling effect of subsequent tail gas, the circulating water flowing out of the return pipe is cooled by a cooling tower and then sent to a spray room again to continue cooling the tail gas; the utility model discloses a shower head is preferred to adopt spiral nozzle, because sprays the water yield big, so with recirculated cooling water, and recirculated cooling water is difficult to avoid the aquatic to have smoke and dust and incrustation scale, if lead to easily stopping up with ordinary atomising head, uses spiral nozzle then effectively to avoid this condition, and the cooling water recycles and discharges after a period and handles in the appointed sewage treatment plant, trades clean circulating water again.
The precooled tail gas enters a first washing tower and a second washing tower, wherein the first washing tower is an alkaline washing tower and has the function of deacidifying the flue gas; the second washing tower has the function of cleaning the flue gas, and can clean the tiny particles in the flue gas by utilizing the adsorption effect on the surfaces of water drops while desulfurizing and deacidifying.
The tail gas discharged from the washing tower has a large amount of water drops and high humidity, so that the tail gas is sent to a heat accumulating typeDemisting is required before combustion in the combustion furnace. The utility model discloses in, be provided with high-efficient defroster before heat accumulation formula combustion furnace's the input, adopt high-efficient defroster to carry out the defogging, tail gas after the defogging is blown into tail gas heat treatment system by the draught fan, and the flue gas loops through inlet plenum, combustion chamber, goes out the air chamber and accomplishes exhaust-gas treatment in heat accumulation formula combustion furnace, lets in sufficient air and auxiliary fuel in the combustion chamber, heats to 850 ℃ the tail gas combustion that will let in the combustion chamber, makes the organic matter turn into harmless CO completely2And H2O, introducing the high-temperature tail gas into the gas outlet chamber through the air exchange valve, releasing heat energy into the heat accumulator by the high-temperature tail gas in the gas outlet chamber, discharging the flue gas from the gas outlet chamber when the temperature of the flue gas is reduced to 100-80 ℃, and storing the heat energy generated during the combustion of the tail gas in the heat accumulator of the flue because the wall of the combustion chamber is also the heat accumulator; the heat accumulator uses the heat energy for preheating the tail gas in the gas inlet chamber, thereby efficiently utilizing the heat energy of the recovered tail gas, achieving the purpose of saving fuel and greatly reducing the energy consumption; when the temperature sensor in the combustion chamber detects that the temperature in the furnace is too high, the intermittent over-temperature gas discharge port is opened, certain high-temperature gas is discharged, the temperature in the furnace is reduced, and explosion is prevented.
In order to ensure that the emission of pollutants in the tail gas reaches the standard, an activated carbon spraying and loading machine is arranged behind the heat accumulating type combustion furnace, the pollutant gas in the tail gas is further adsorbed by utilizing the strong adsorption effect of the activated carbon, then activated carbon powder carried in the tail gas is captured by a cloth bag dust remover, and the captured activated carbon powder is treated as hazardous waste.
The standard gas after cloth bag dust removal is introduced into a chimney by an induced draft fan to be discharged, a volatile organic compound online monitoring system is arranged in the chimney, preferably a JH-VOC type volatile organic compound online monitoring system adopts an inlet PID sensor, non-methane total hydrocarbon, benzene, toluene, xylene and the like in the gas are monitored online, the system can be customized according to VOC characteristic pollutants of different industries and working conditions, the pollutant condition in the tail gas discharged by the chimney can be detected at any time, and abnormal conditions are timely fed back to a worker for treatment.
Compared with the prior art, the utility model, through add tail gas between cyclone and first scrubbing tower in advanceThe cold system is used for cooling the high-temperature tail gas subjected to dust removal to prevent high temperature from damaging subsequent treatment equipment, and the tail gas heat treatment system is additionally arranged between the second washing tower and the induced draft fan, wherein the regenerative combustion furnace enables organic matters such as VOCs (volatile organic compounds), dioxin and the like to be completely converted into harmless CO2And H2And O, the activated carbon spraying machine further adsorbs pollutant gases in the tail gas, the cloth bag dust remover captures activated carbon powder entrained in the tail gas, all the devices are scientifically and reasonably arranged and matched, the operation stability is high, toxic and harmful gases are effectively decomposed, the emission of organic matters in the flue gas is prevented from exceeding the standard, and the environment-friendly effect is realized.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.
Claims (10)
1. A waste gas treatment system for sludge treatment comprises a cyclone dust removal device, a first washing tower, a second washing tower, an induced draft fan and a chimney which are sequentially communicated, and is characterized in that a tail gas precooling system is additionally arranged between the cyclone dust removal device and the first washing tower, and a tail gas heat treatment system is additionally arranged between the second washing tower and the induced draft fan, wherein the tail gas precooling system comprises a spray room, a cooling tower and a return pipe which is communicated with the spray room and the cooling tower, and the tail gas heat treatment system comprises a heat accumulating type combustion furnace, an active carbon spray machine and a cloth bag dust remover which are sequentially communicated;
the spraying device comprises a driving motor, a rotating shaft and a plurality of layers of spraying supports, wherein the spraying supports are uniformly arranged along the circumferential direction of the rotating shaft, the rotating shaft is a hollow circular tube and is communicated with the spraying supports, and the tail ends of the spraying supports are connected with a plurality of spray heads;
the regenerative combustion furnace comprises a furnace body, an air inlet pipe connected with an input end of the furnace body, and an air outlet pipe connected with an output end of the furnace body, wherein an air inlet chamber, a combustion chamber and an air outlet chamber which are formed by heat accumulators at intervals are arranged in the furnace body, the air inlet chamber is communicated with the combustion chamber through an air exchange valve, and the air outlet chamber is communicated with the combustion chamber through an air exchange valve.
2. The waste gas treatment system for sludge treatment as claimed in claim 1, wherein a driving gear is fixedly connected to an output shaft of the driving motor, a driven gear engaged with the driving gear is provided at one end of the rotating shaft, and the driving motor drives the rotating shaft to rotate.
3. The system of claim 2, wherein a bearing is fixedly connected to one end of the rotating shaft passing through the spray chamber, and the input end of the return pipe is communicated with the rotating shaft through the bearing.
4. The waste gas treatment system for sludge treatment according to claim 1, wherein the number of the spray brackets is at least two, the number of the spray brackets in each layer is at least one, and the projections of the spray brackets in each layer at one end of the rotating shaft in the horizontal plane are not coincident.
5. The waste gas treatment system for sludge treatment according to claim 1, wherein one end of the air inlet pipe is provided with a first fan, an air inlet of the first fan is communicated with a gas mixing tank, and an input end of the gas mixing tank is respectively communicated with a tail gas induced duct, a gas pipe and an air pipe.
6. The waste gas treatment system for sludge treatment as claimed in claim 5, wherein the inside of the gas mixing box is provided with a partition plate, and the partition plates are arranged in a staggered manner from top to bottom to form an S-shaped gas flow channel.
7. The waste gas treatment system for sludge treatment as claimed in claim 1, wherein the sidewall of the combustion chamber is provided with a temperature sensor, and an intermittent over-temperature gas discharge outlet is provided above the combustion chamber.
8. The exhaust gas treatment system for sludge treatment according to claim 1, wherein the heat accumulator is any one of a heat accumulation brick or a honeycomb ceramic heat accumulator.
9. The waste gas treatment system for sludge treatment as claimed in claim 1, wherein the input end of the regenerative combustion furnace is provided with a high-efficiency demister in front.
10. The waste gas treatment system for sludge treatment as claimed in claim 1, wherein an online monitoring system for volatile organic compounds is arranged in the chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921714410.7U CN211159105U (en) | 2019-10-12 | 2019-10-12 | Waste gas treatment system for sludge treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921714410.7U CN211159105U (en) | 2019-10-12 | 2019-10-12 | Waste gas treatment system for sludge treatment |
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| Publication Number | Publication Date |
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| CN211159105U true CN211159105U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921714410.7U Active CN211159105U (en) | 2019-10-12 | 2019-10-12 | Waste gas treatment system for sludge treatment |
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| CN (1) | CN211159105U (en) |
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- 2019-10-12 CN CN201921714410.7U patent/CN211159105U/en active Active
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