CN102746904B - Treating device and treating process for waste gas produced in pyrolysis of waste rubber and plastics - Google Patents
Treating device and treating process for waste gas produced in pyrolysis of waste rubber and plastics Download PDFInfo
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- CN102746904B CN102746904B CN201210230095.7A CN201210230095A CN102746904B CN 102746904 B CN102746904 B CN 102746904B CN 201210230095 A CN201210230095 A CN 201210230095A CN 102746904 B CN102746904 B CN 102746904B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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- Treating Waste Gases (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a treating device and a treating process for waste gas produced in pyrolysis of waste rubber and plastics, belonging to the field of environmental protection. The device comprises a buffer tank, a liquid separating tank, a purification tank, a desulfurization tank, a safety tank, a vacuum pump, a corrosion-resistant pump, second to eighth stop valves, a ball valve, a gate valve, first to fifth blowoff valves, a steam valve, a gas respirator and an explosion-proof means. According to embodiments of the invention, by using the device composed of the buffer tank, the liquid separating tank, the purification tank, the desulfurization tank, the safety tank, the vacuum pump, the corrosion-resistant pumps and various control valves, solid dust, floating oil fumes and harmful gases like sulfur dioxide and hydrogen sulfide in waste gas can be effectively treated under the premise of safety and environmental protection so as to obtain an effective energy of combustible gas for a pyrolysis apparatus, and waste gas is thus completely recycled; not only the problem of environmental pollution caused by disordered emission of waste gas is overcome, but also a great amount of renewable energy is recycled and consumption of plenty of fuel oil or coal resources needed in pyrolysis is reduced.
Description
Technical field
The present invention relates to environmental protection equipment, particularly emission-control equipment and treatment process in a kind of waste and old rubber cracking.
Background technology
At present, approximately 5～8% the non-condensable gas producing in damaged tire, rubber or Pyrolysis of Plastics Wastes is waste gas, and waste gas comprises solid dust, mucus shape tar, sulfur dioxide and hydrogen sulfide gas.
Because the device of the above-mentioned waste gas of conventional treatment is complicated, make emission-control equipment investment and construction work amount, take the cost of investment of a whole set of apparatus for thermal cleavage 20～30%.In addition, emission-control equipment is in operation needs loss great lot of water resources.So, most of Pyrolysis Plants for Used Tires device manufacturer and treatment plant do not match exhaust-gas treatment, and this part waste gas is directly discharged or with the direct burning and exhausting of torch form, caused thus serious environmental pollution, and wasted the energy of a large amount of recoverables.
Therefore develop a kind of device simple, equipment investment cost thermal cracking waste gas treatment equipment cheap and safe, efficient, environmental protection just seems particularly urgent.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the embodiment of the present invention provides emission-control equipment and treatment process in a kind of waste and old rubber cracking, and this device has simple in structure, and cost of investment is cheap, and advantage safe, efficient, environmental protection, this technique has advantages of easy and simple to handle.Described technical scheme is as follows:
An emission-control equipment in cracking, described device comprises surge tank, minute flow container, purification pot, digester, safety can, vavuum pump, noncorrosive pump, the second to the 8th stop valve, ball valve, gate valve, the first to the 5th blowoff valve, steam valve, gas respirator and explosion-proof apparatus;
Described surge tank is used for collecting waste gas, described surge tank is connected to described minute flow container through the second stop valve, described vavuum pump, described the 3rd stop valve, so that waste gas is pumped to described minute flow container through described vavuum pump by described surge tank, described surge tank top is provided with described gas respirator, described surge tank bottom is provided with the first blowoff valve, so that described surge tank blowdown;
Solid dust and tarry matters in smoke that described minute flow container contains for waste gas described in filtering, within described minute, flow container top the 4th stop valve is connected to described digester, so that the exhaust-gas flow of described minute flow container is to described digester, within described minute, flow container middle part the 5th stop valve is connected to described purification pot, so that the described solid dust of bubbling through the water column and described tarry matters in smoke flow to described purification pot through described the 5th stop valve, described separatory pot bottom is provided with the second blowoff valve, so that flow container blowdown in described minute, between described minute flow container and described purification pot, be parallel with steam valve, to get rid of residual flue dust and grease in described minute flow container and described purification pot steam,
Described purification pot is used for collecting described solid dust and described tarry matters in smoke, and the bottom of described purification pot is provided with described the 3rd blowoff valve, so that described purification pot blowdown;
Described digester in order to become clean imflammable gas by described waste gas after alkali lye neutralization reaction wherein, described digester is provided with alkali liquor circulating system, described alkali liquor circulating system comprises described the 6th stop valve being connected in turn by pipeline, described noncorrosive pump, described gate valve, described ball valve, described the 8th stop valve and spray element, wherein said ball valve is that alkali lye injects the mouth of pipe, described digester is connected to described safety can through described the 7th stop valve, so that the imflammable gas of described cleaning is delivered to described safety can, described digester bottom is provided with the 4th blowoff valve,
Described safety can is for depositing the imflammable gas of described cleaning, and the top of described safety can is provided with described explosion-proof apparatus, and the bottom of described safety can is provided with described the 5th blowoff valve, and described safety can is provided with fuel gas outlet.
Particularly, described vavuum pump is water ring vacuum pump, and by PLC and Frequency Converter Control.
Particularly, described separatory is filled with inside and is provided with filter cigarette grid, by the solid dust and the tarry matters in smoke that contain in waste gas described in the filtering of described filter cigarette grid.
Particularly, described spray element is annular, and described spray element surface is provided with evenly densely covered micropore, by described noncorrosive pump, alkali lye pressurization is made to the vaporific alkali lye spraying on the micropore of described spray element.
Particularly, described surge tank is ￠ 1200 * 2600mm, described purification pot is ￠ 440 * 600mm, within described minute, flow container, described digester and described safety can are ￠ 600 * 1200mm, and described surge tank, described minute flow container, described purification pot, described digester and described safety can are vertical type installation and are a straight line.
Further, described emission-control equipment also comprises the first stop valve, described the first stop valve is connected in parallel on the arrival end of described the second stop valve and the port of export of described the 3rd stop valve, and described the first stop valve is for regulating from described surge tank to described minute flow container gas flow.
The present invention also provides a kind for the treatment of process for waste and old rubber cracking emission-control equipment, comprises emission-control equipment in described waste and old rubber cracking, and described treatment process carries out according to following step,
Waste gas in step 2, described surge tank is pumped through described vavuum pump, makes waste gas pass through described minute flow container with the metastable speed of a kind of flow,
In step 3, mobile waste gas, contain a small amount of solid dust and with the elegant tarry matters in smoke of waste gas through flow container filtering in described minute;
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is: compare existing technology, the embodiment of the present invention is passed through surge tank, divide flow container, purification pot, digester, safety can, vavuum pump, the device that noncorrosive pump and various by-pass valve control form, can be in safety, under the prerequisite of environmental protection, by the solid dust containing in waste gas, floating oil smoke, sulfur dioxide and hydrogen sulfide pernicious gas are effectively processed, become effective energy imflammable gas of apparatus for thermal cleavage, recycle completely, the present invention has not only solved the pollution problem of the unordered discharge of waste gas to environment, a large amount of renewable sources of energy have also been recycled simultaneously, reduce in thermal cracking and need a large amount of fuel oil of loss or coal resources, simultaneously, it is reasonable that described device also has simple structure, area occupied is little, the advantage that cost of investment is cheap.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the overall structure figure of emission-control equipment in the waste and old rubber cracking that provides of the embodiment of the present invention;
Fig. 2 is the PLC control structure figure that the embodiment of the present invention provides;
Fig. 3 is the main control structure chart of the emission-control equipment that provides of the embodiment of the present invention;
Fig. 4 is the flow control structure figure of the emission-control equipment that provides of the embodiment of the present invention.
In figure, each symbol represents that implication is as follows:
1 fuel oil is collected and is filled with, 2 surge tanks, 3 minutes flow containers, 4 purification pots, 5 digesters, 6 safety cans, 7 vavuum pumps, 8 noncorrosive pumps, 9 pressure sensors, 10 digital micromanometers, 11 PLC, 12I/O module, 13 cracking stills, 14 frequency converters;
Va1 the first stop valve, Va2 the second stop valve, Va3 the 3rd stop valve, Va4 the 4th stop valve, Va5 the 5th stop valve, Va6 the 6th stop valve, Va7 the 7th stop valve, Va8 the 8th stop valve, Va9 ball valve, Va10 gate valve, Va11 the first blowoff valve, Va12 the second blowoff valve, Va13 the 3rd blowoff valve, Va14 the 4th blowoff valve, Va15 the 5th blowoff valve, Va16 steam valve, Va17 gas respirator, Va18 explosion-proof apparatus;
GS1 filter cigarette grid;
PL1 sprays element.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
As shown in Figure 1, emission-control equipment in a kind of waste and old rubber cracking provided by the invention, described device comprises surge tank 2, minute flow container 3, purification pot 4, digester 5, safety can 6, vavuum pump 7, noncorrosive pump 8, the second to the 8th stop valve Va2-Va8, ball valve Va9, gate valve Va10, the first to the 5th blowoff valve Va11-Va15, steam valve Va16, gas respirator Va17 and explosion-proof apparatus Va18;
Described surge tank 2 is for collecting waste gas, described surge tank 2 is connected to described minute flow container 3 through the second stop valve Va2, described vavuum pump 7, described the 3rd stop valve Va3, so that waste gas is pumped to described minute flow container 3 through described vavuum pump 7 by described surge tank 2, described surge tank 2 tops are provided with described gas respirator Va17, described surge tank 2 bottoms are provided with the first blowoff valve Va11, so that 2 blowdowns of described surge tank;
Solid dust and tarry matters in smoke that described minute flow container 3 contains for waste gas described in filtering, within described minute, flow container 3 tops the 4th stop valve Va4 is connected to described digester 5, so that the exhaust-gas flow of described minute flow container 3 is to described digester 5, within described minute, flow container 3 middle parts the 5th stop valve Va5 is connected to described purification pot 4, so that the described solid dust of bubbling through the water column and described tarry matters in smoke flow to described purification pot 4 through described the 5th stop valve Va5, within described minute, flow container 3 bottoms are provided with the second blowoff valve Va12, so that flow container 3 blowdowns in described minute, between described minute flow container 3 and described purification pot 4, be parallel with steam valve Va16, to get rid of residual flue dust and grease in described minute flow container 3 and described purification pot 4 steam,
Described purification pot 4 is for collecting described solid dust and described tarry matters in smoke, and the bottom of described purification pot 4 is provided with described the 3rd blowoff valve Va13, so that 4 blowdowns of described purification pot;
Described digester 5 in order to become clean imflammable gas by described waste gas after alkali lye neutralization reaction wherein, described digester 5 is provided with alkali liquor circulating system, described alkali liquor circulating system comprises described the 6th stop valve Va6 being connected in turn by pipeline, described noncorrosive pump 8, described gate valve Va10, described ball valve Va9, described the 8th stop valve Va8 and spray element PL1, wherein said ball valve Va9 is that alkali lye injects the mouth of pipe, described digester 5 is connected to described safety can 6 through described the 7th stop valve Va7, so that the imflammable gas of described cleaning is delivered to described safety can 6, described digester 5 bottoms are provided with the 4th blowoff valve Va14,
Described safety can 6 is for depositing the imflammable gas of described cleaning, and the top of described safety can 6 is provided with described explosion-proof apparatus Va18, and the bottom of described safety can 6 is provided with described the 5th blowoff valve Va15, and described safety can 6 is provided with fuel gas outlet.
As shown in Figure 1, the embodiment of the present invention is by surge tank 2, divide flow container 3, purification pot 4, digester 5, safety can 6, vavuum pump 7, the device that noncorrosive pump 8 and various by-pass valve control form, can be in safety, under the prerequisite of environmental protection, by the solid dust containing in waste gas, floating oil smoke, sulfur dioxide and hydrogen sulfide pernicious gas are effectively processed, become effective energy imflammable gas of apparatus for thermal cleavage, recycle completely, the present invention has not only solved the pollution problem of the unordered discharge of waste gas to environment, a large amount of renewable sources of energy have also been recycled simultaneously, reduce in thermal cracking and need a large amount of fuel oil of loss or coal resources.
Particularly, as shown in Figure 1, described vavuum pump 7 is water ring vacuum pump, and controls by PLC 11 and frequency converter 14.
In the present embodiment, described device adopts water ring vacuum pump 7 to vacuumize medium circulation utilization and produces without waste water, water consumption is few, and the closed circulating by water ring vacuum pump 7 moves, and is processing its water consumption monthly of 10 tons of damaged tire production lines a day less than 0.5 ton.
In addition, adopt water ring vacuum pump 7 can also improve exhaust-gas flow speed, stabilizing gas flow velocity, the compression of 7 pairs of gases of this water ring vacuum pump is to carry out under Isothermal Condition, therefore when force feed or suction flammable explosive gas, is difficult for causing danger.
More specifically, by the effect of surge tank 2, make waste gas to obtain buffer memory at surge tank 2, and the control of the frequency control adopting with water ring vacuum pump 7 combines and can make exhaust gas flow more stable, the effect of desulfurization is more obvious, this kind of technology is combined utilization with equipment and technology, improved the ability of removing waste gas solid dust and desulfurization.
As shown in Figure 2, the dynamic Control of described device adopts PLC 11 and frequency converter 14 to control, make described device realize automation, simultaneously, can make cracking still 13 internal pressures all the time in micro-negative pressure, improve thermal cracking and obtain environmental-protecting performance, make described equipment safety dependable performance, package unit power consumption is seldom about 4.75KW, by variable frequency adjustment, vacuumize, gas is at flow process stability of flow, make operating load be in stable power save mode operation frequency conversion conveying gas continuously, can guarantee safety, and gas is at flow process stability of flow, can promote that detach procedure is even.
Particularly, as shown in Figures 2 and 3, digital micromanometer 10 is installed to detect exhausted air quantity size in still on cracking still 13, the AI that is connected to the I/O module 12 of PLC 11 by digital micromanometer 1 road signal output holds, analog signals source as PLC 11, adopt TW two wire 4～20mA standard signal pressure sensor 9 to do signal source simultaneously, detect oil and gas content in still, this 4～20mA standard signal is by collected PLC 11 controllers of analog input module of PLC 11, in the present embodiment, PLC 11 adopts S7-200 series CPU and the I/O module 12 of Siemens, as controller and analog input and output interface, PLC 11 controller CPUs read after AI (analog input module) 4～20mA signal according to the size of AI signal, through computing and relatively, export corresponding 2～10V control signal to AO port (analog output module).The curve of having set by program, PLC 11 controllers are set PID regulative mode for and according to the control signal that approaches a 4～20mA of control curve output of program setting, are directly controlled the output frequency of frequency converter 14, realize water ring vacuum pump 7 along with the represented exhausted air quantity size of the height of still internal pressure value is controlled the flow velocity that extracts waste gas automatically.Frequency converter 14 is set in Terminal control, analog quantity 2～10V control mode, and larger frequency converter 14 output frequencies of control signal are larger, otherwise less.
As shown in Figure 2, the differential manometer that pressure sensor 9 band numeral demonstrations are installed on cracking still 13 can detect oil gas tolerance size in still, and the force value of the large-minded little generation of oil gas can be converted to the output of 4～20mA standard signal, this signal is by collected PLC 11 controllers of analog input module of PLC 11, the control curve of then having set with program compares, PLC 11 controllers can be exported the control signal of a 4～20mA, signal is by I/O output module, this signal is converted into the analog signal control end of the d. c. voltage signal access frequency converter 14 of 2 corresponding～10V, by the V10 of frequency converter 14, the control source of GND control end is set for after analog input control.In still, exhausted air quantity hour its pressure is less compared with low signal value, the control signal of PLC 11 controller outputs is also little, at frequency converter 14V10, the DC voltage value of GND control end is also little, the slow speed that it extracts waste gas of motor speed of the low water ring vacuum pump 7 of frequency converter 14 output frequency is slow, otherwise the oil and gas content producing while accelerating along with cracking still 13 temperature rising heat scission reaction speed is on the increase, also accordingly how exhausted air quantity wherein, just need its extraction fast, at this moment will strengthen water ring vacuum pump 7 exhaust capacitys, the speed way of controlling raising water ring vacuum pump 7 is exactly by the rising of still internal pressure value, differential manometer output signal increases, the signal that PLC 11 receives increases output control signal and also increases, so at frequency converter 14V10, the frequency that GND control signal voltage also increases frequency converter 14 outputs has increased, the motor speed of water ring vacuum pump 7 just improves thereupon, it is large that the ability that water ring vacuum pump 7 vacuumizes becomes, the flow velocity of waste gas is with regard to corresponding raising.Whole control procedure PLC 11 is that the mode regulating with PID is directly controlled the output frequency of frequency converter 14 according to the control curve that approaches program setting, realize water ring vacuum pump 7 along with the height of the big or small institute corresponding pressure value of oil and gas content generation in still is controlled rotating speed automatically, the method of this employing closed-loop control can access still internal pressure and remain micro-negative pressure, even if keep cracking still 13 to be always negative pressure, just guaranteed that cracking still 13 has some leakage to be also unlikely to oil gas is emitted outward, stopped production scene poisonous, the generation of odorous gas, realizing complete equipment is the environmental protection object of safety again.
As can be seen here, this automatic control core technology is exactly PLC 11 and the automatic rotating speed of controlling water ring vacuum pump 7 of frequency converter 14 in use device, utilized surge tank 2 to make the flow velocity of waste gas reach stable simultaneously, improve cracking still 13 environmental protection and security performance, after waste gas flow speed stability, desulfurized effect obviously improves, and adopts recycling technology low without waste water generation, energy loss.
Particularly, as shown in Figure 1, described separatory is filled with inside and is provided with filter cigarette grid G S1, by the solid dust and the tarry matters in smoke that contain in waste gas described in described filter cigarette grid G S1 filtering.
The present embodiment has adopted the interior liquid of minute flow container 3 to remove the solid dust containing in waste gas, adopt the floating oil smoke in simple filter cigarette grid eliminating waste gas, in the suitable height situation of the liquid level of controlling minute flow container 3, the oil smoke oil bloom that float on liquid level are flow in purification pot 4, the object that reclaims this part Residual oil is mainly to clean the imflammable gas of recovery, reduce combustion gas and because these oil smoke are detained in pipeline, cause tracheae plugging fault at pipe conveying procedure, the present embodiment adopt the processing of minute flow container 3 make solid dust with can be completely separated at waste gas with the elegant tarry matters in smoke of waste gas.
Particularly, as shown in Figure 1, described spray element PL1 is annular, and described spray element PL1 surface is provided with evenly densely covered micropore, by described noncorrosive pump 8, alkali lye pressurization is made to the vaporific alkali lye spraying on the micropore of described spray element PL1.In the present embodiment, by the annular micropore spray in digester 5 and noncorrosive pump 8 circulation pressing technologies, make processed gas fully merge and to reach the effect that improves desulfurization with alkali lye, disposal ability is according to actual waste gas generation design system ability.
As preferably, annular spray element PL1 adopts the simmering and bending of stainless steel tube material to form, and on pipe, be provided with connecing soon of a DN20, can be connected to very easily on alkali liquor pipe, the application connecing soon makes annular spray element PL1 more be easy to dismounting, simultaneously, at pipe surface uniform, be densely covered with the micropore of 2.5mm, when being pressurized to 0.3～0.4MPa by alkali lye, goes by noncorrosive pump 8, the alkali lye spraying on micropore is vaporific, alkali lye and processed waste gas are fully merged, improved the effect of neutralization reaction, desulfurization work is more thorough.
Particularly, shown in Figure 1, surge tank described in the present embodiment 2 is ￠ 1200 * 2600mm, described purification pot 4 is ￠ 440 * 600mm, within described minute, flow container 3, described digester 5 and described safety can 6 are ￠ 600 * 1200mm, described surge tank 2, described minute flow container 3, described purification pot 4, described digester 5 and described safety can 6 are vertical type installation and are a straight line, by said structure, make process pipelines simple, apparatus structure is simple and direct, and each building block definite functions is conducive to operation.
Further, as shown in Figure 1, described emission-control equipment also comprises the first stop valve Va1, described the first stop valve Va1 is connected in parallel on the arrival end of described the second stop valve Va2 and the port of export of described the 3rd stop valve Va3, and described the first stop valve Va1 is for regulating from described surge tank 2 to described minute flow container 3 gas flows.
Described in the present embodiment, installing specification, the material of each part selects as shown in table 1:
Table 1
| Label | Device name | | Material | Effect | |
| 2 | Surge tank | ￠1200×2600mm | Carbon steel | Waste |
|
| 3 | Divide flow container | ￠600×1200mm | Carbon steel | Solid dust in eliminating |
|
| 4 | Purification pot | ￠440×600mm | Carbon steel | Collect remaining oil stain in |
|
| 5 | Digester | ￠600×1200mm | Carbon steel | |
|
| 6 | Safety can | ￠600×1200mm | Carbon steel | Utilize water seal mode to stop tempering | |
| 7 | Water ring vacuum pump | 2BV-5110 | Carbon steel | Vacuumize adjustments of |
|
| 8 | Noncorrosive pump | FSB-20 | Tetrafluoro | Neutralizer pressurization | |
| Frequency converter | MCD320-055G | Regulate Water-ring vacuum revolution speed | |||
| Digital micro manometer | -20～+20KPa | Still internal pressure detects and signal source | |||
| Va1 | Balanced valve | DN50 Pg16 | Carbon steel | Manual adjustments waste gas flow velocity |
At present, damaged tire can produce the gaseous material of the hydrocarbon of C1～C20 in thermal cracking processes, and C5～C20 becomes liquid after condensation, it is exactly our common fuel oil, it is collected fuel oil collecting tank, there is non-condensable gas C1～C5 of 5%～8% to be separated simultaneously, if these gaseous materials are proceeded to process to reclaim at present, just do not become waste gas by unordered discharge or empty burning of igniting the torch, and after processing by device of the present invention, these non-condensable gas are that the energy that a kind of imflammable gas can be used as damaged tire thermal cracking is able to abundant recycling, this work guarantee the environmental protection of thermal cracking, safety problem, again for thermal cracking provides a large amount of energy.
As shown in Figure 1, the present invention also provides a kind for the treatment of process for waste and old rubber cracking emission-control equipment, comprises emission-control equipment in above-mentioned waste and old rubber cracking, and described treatment process carries out according to following step,
1, by gas sampling in surge tank 2;
2, the waste gas in surge tank 2 is through the pumping of vavuum pump 7, make waste gas with the metastable speed of a kind of flow by a minute flow container 3,
3, in mobile waste gas, contain a small amount of solid dust and divide flow container 3 filterings with the elegant tarry matters in smoke warp of waste gas;
The solid dust of 4, bubbling through the water column and tarry matters in smoke flow to purification pot 4 through the 5th stop valve Va5;
5, waste gas continues to flow to digester 5, after the neutralization reaction of alkali lye wherein, becomes clean imflammable gas,
Particularly, waste gas passes through the spray element PL1 in digester 5 and by circulating pump pressurization, limewash is formed vaporific, limewash is abundant in conjunction with producing neutralization reaction with the combustion gas that contains SO2 gas flowing in digester 5, SO2+Ca (OH) 2=CaSO3+H2O ↓, the stability of its chemistry of the calcium sulfate substance producing after reaction and physics reaches desulfurization object, last product is exactly gypsum, gypsum is a kind of water-fast stable material, can be used for the raw material that construction material and cement are made, if in employing buck and rear generation be that sodium sulfite Na2SO3 digester 5 can give more than 90% SO2 gas
SO
2+2Na(OH)＝Na
2(SO
3)+H
2O
Dissolve, the material after desulfurization just becomes clean imflammable gas, and finally the safety can 6 by water seal is sent to combustor and uses as fuel, and the combustion gas that adopts sulfur removal technology to process can reduce in a large number the sulfur content in flue gas after burning;
6, this clean gas, through the 7th stop valve Va7 after safety can 6, is used as fuel to combustor.
The present embodiment can carry out environmental protection treatment by the waste gas producing in cracking, reaches safe recycling, plays the effect of energy-saving and emission-reduction; The multinomial technological processes such as described process using separation, purification, desulfurization are by micronic dust, SO in gas
2, H
2s composition carries out effectively removing and becomes clean imflammable gas and be recovered utilization, has solved the needed most of energy of thermal cracking process; In described device, added water ring vacuum pump 7, can make the oil gas that produces in cracking when condensation, gas, liquid is effectively separated and suck stably surge tank 2, improve gas flow rates and solved the defect that imflammable gas flow velocity shakiness causes combustor flame shakiness; Described water ring vacuum pump 7 adopts VFC to play the flow velocity that energy-saving effect can also regulate imflammable gas simultaneously according to the gas output in cracking and technological requirement adjusting rotary speed; Described digester 5 adopted alkali lye circulated sprinkling can be fully and gas merge and improve desulfurized effect.
The present invention has adopted a brand-new process route to solve cracking waste gas safety, environment-friendly treatment method, effectively improve desulfuration efficiency, simple in equipment floor space is little, cheap, process innovation is strong, can realize industrialization and recycle continuously the waste gas of discharging in junked tire, rubber and Pyrolysis of Plastics Wastes still 13, reach and make full use of the energy, reduce toxic emission, energy-saving and emission-reduction, are to meet the energy-conserving product of country's promotion and the New Equipments of " low-carbon economy " that international organization advocates.
After reality has adopted device of the present invention, desulfurized effect is obvious; imflammable gas in waste gas is all recycled; through Shandong Province's environment protection and monitoring central station, the flue gas of discharge is detected; toxic emission: SO2 concentration of emission is 96mg/m3; SO2, NOx concentration of emission all meet (GB13271-2001) emission standard of air pollutants for boilers > >, and specific targets are as shown in table 2:
Table 2, damaged tire cracking exhaust gas constituents table: sample: tire hot cracking gas
The clean gas composition finally decompositing is as shown in table 3:
Table 3, fuel gas constituent analysis unit: %
Note: calorific value unit is MJ/kg.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (5)
1. emission-control equipment in a waste and old rubber cracking, it is characterized in that, described device comprises surge tank, minute flow container, purification pot, digester, safety can, vavuum pump, noncorrosive pump, the second to the 8th stop valve, ball valve, gate valve, the first to the 5th blowoff valve, steam valve, gas respirator and explosion-proof apparatus;
Described surge tank is used for collecting waste gas, described surge tank is connected to described minute flow container through the second stop valve, described vavuum pump, described the 3rd stop valve, so that waste gas is pumped to described minute flow container through described vavuum pump by described surge tank, described surge tank top is provided with described gas respirator, described surge tank bottom is provided with the first blowoff valve, so that described surge tank blowdown;
Solid dust and tarry matters in smoke that described minute flow container contains for waste gas described in filtering, within described minute, flow container top the 4th stop valve is connected to described digester, so that the exhaust-gas flow of described minute flow container is to described digester, within described minute, flow container middle part the 5th stop valve is connected to described purification pot, so that the described solid dust of bubbling through the water column and described tarry matters in smoke flow to described purification pot through described the 5th stop valve, described separatory pot bottom is provided with the second blowoff valve, so that flow container blowdown in described minute, between described minute flow container and described purification pot, be parallel with steam valve, to get rid of residual flue dust and grease in described minute flow container and described purification pot steam,
Described purification pot is used for collecting described solid dust and described tarry matters in smoke, and the bottom of described purification pot is provided with described the 3rd blowoff valve, so that described purification pot blowdown;
Described digester in order to become clean imflammable gas by described waste gas after alkali lye neutralization reaction wherein, described digester is provided with alkali liquor circulating system, described alkali liquor circulating system comprises described the 6th stop valve being connected in turn by pipeline, described noncorrosive pump, described gate valve, described ball valve, described the 8th stop valve and spray element, wherein said ball valve is that alkali lye injects the mouth of pipe, described digester is connected to described safety can through described the 7th stop valve, so that the imflammable gas of described cleaning is delivered to described safety can, described digester bottom is provided with the 4th blowoff valve,
Described safety can is for depositing the imflammable gas of described cleaning, and the top of described safety can is provided with described explosion-proof apparatus, and the bottom of described safety can is provided with described the 5th blowoff valve, and described safety can is provided with fuel gas outlet;
Described vavuum pump is water ring vacuum pump, and by PLC and Frequency Converter Control;
Described separatory is filled with inside and is provided with filter cigarette grid, by the solid dust and the tarry matters in smoke that contain in waste gas described in the filtering of described filter cigarette grid.
2. emission-control equipment in waste and old rubber cracking as claimed in claim 1, it is characterized in that, described spray element is annular, and described spray element surface is provided with evenly densely covered micropore, by described noncorrosive pump, alkali lye pressurization is made to the vaporific alkali lye spraying on the micropore of described spray element.
3. emission-control equipment in waste and old rubber cracking as claimed in claim 1, it is characterized in that, described surge tank is ￠ 1200 * 2600mm, described purification pot is ￠ 440 * 600mm, within described minute, flow container, described digester and described safety can are ￠ 600 * 1200mm, and described surge tank, described minute flow container, described purification pot, described digester and described safety can are vertical type installation and are a straight line.
4. emission-control equipment in the waste and old rubber cracking as described in claim 1-3 any one claim, it is characterized in that, described emission-control equipment also comprises the first stop valve, described the first stop valve is connected in parallel on the arrival end of described the second stop valve and the port of export of described the 3rd stop valve, and described the first stop valve is for regulating from described surge tank to described minute flow container gas flow.
5. for a treatment process for waste and old rubber cracking emission-control equipment, it is characterized in that, comprise emission-control equipment in the waste and old rubber cracking described in claim 1-4 any one claim, described treatment process carries out according to following step,
Step 1, by gas sampling in described surge tank;
Waste gas in step 2, described surge tank is pumped through described vavuum pump, makes waste gas pass through described minute flow container with the metastable speed of a kind of flow,
In step 3, mobile waste gas, contain a small amount of solid dust and with the elegant tarry matters in smoke of waste gas through flow container filtering in described minute;
Step 4, the solid dust of bubbling through the water column and tarry matters in smoke flow to described purification pot through described the 5th stop valve;
Step 5, waste gas continue to flow to described digester, after the neutralization reaction of alkali lye wherein, become clean imflammable gas,
Step 6, described clean gas, are used as fuel to combustor through described the 7th stop valve after described safety can.
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| CN103450959B (en) * | 2013-08-31 | 2015-09-16 | 山东邹平开元化工石材有限公司 | A kind of junked tire cracking combustion gas recycling device |
| CN104764026B (en) * | 2015-03-27 | 2017-07-18 | 湖南飞洋机电科技有限公司 | A kind of gas handling system |
| CN105605929A (en) * | 2015-12-16 | 2016-05-25 | 合肥恒力电子装备公司 | Precise micropressure control and comprehensive waste gas processing device suitable for atmosphere kiln |
| CN113105921B (en) * | 2021-04-21 | 2021-12-07 | 徐州工业职业技术学院 | Device and method for purifying noncondensable gas generated by pyrolysis of waste tire |
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| CN201744264U (en) * | 2010-06-30 | 2011-02-16 | 赵忠世 | Large-energy precise flue gas treatment device |
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| SE502925C2 (en) * | 1994-06-23 | 1996-02-19 | Abb Flaekt Ind Ab | Methods and apparatus for removing sulfur dioxide from a gas |
| JP5535818B2 (en) * | 2010-08-09 | 2014-07-02 | 三菱重工業株式会社 | Biomass gasification gas purification system and method, methanol production system and method |
| CN102151469A (en) * | 2011-01-21 | 2011-08-17 | 任力军 | Method for recovering coal tar and removing sulfur and dust from tail gases of coal-burning boilers and furnaces |
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| CN201669051U (en) * | 2010-05-11 | 2010-12-15 | 上海龙净环保科技工程有限公司 | Calcium oxide base strong-alkali absorption device inside wet flue gas desulfurization tower |
| CN201744264U (en) * | 2010-06-30 | 2011-02-16 | 赵忠世 | Large-energy precise flue gas treatment device |
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