CN103585866A - Device and method for purification treatment of gas of medical waste non-incineration treatment - Google Patents
Device and method for purification treatment of gas of medical waste non-incineration treatment Download PDFInfo
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Abstract
The invention discloses a device and a method for purification treatment of gas of medical waste non-incineration treatment. The device and the method comprise the following structure and the following treatment process: exhaust gas goes into a gas buffer tank, and online detection of the exhaust gas composition is carried out; then the exhaust gas goes into a gas pretreatment device and is subjected to heat exchange with a heat exchanger; next, the exhaust gas goes into the interior of a reaction tower through a pipeline and an inlet at the lower end of the reaction tower, then flows from bottom to top, and successively passes through microorganism filler layers, an activated carbon filler layer and a photocatalytic reaction layer; after being subjected to three-time purification in the tower, the exhaust gas is discharged from the top of the reaction tower, then goes into the bottom of a water washing device through a pipeline, and at the same time, goes into the top of the water washing device for elution with water; sewage is discharged from the bottom of the water washing device, sewage treatment is carried out, and the water-washed air is exhausted from the top of the water washing device. Three treatment means are reasonably combined to control VOC and odor components in the exhaust gas; and compared with a single method, the combined three treatment means have more thorough exhaust gas treatment, basically eliminate odors, and have the VOCs removal rate which reaches more than 95%.
Description
Technical field
The invention belongs to environment foul gas processing technology field, more particularly, relate to the non-burning disposal VOC of a kind of clinical waste and foul gas purifying processing device and method.
Background technology
Clinical waste, refers to the refuse with direct or indirect infection, toxicity and other harmfulness that medical and health organization produces in medical treatment, disease-prevention or healthcare and other correlated activations.As composition and the source thereof of clinical waste, in clinical waste, contain a large amount of germs, virus and chemical agent, be the medium of sex pheromone enrichment and propagation, environment and people's physical efficiency are caused to great harm, be a kind of typical hazardous waste.At present, the existing multiple technologies of final processing for clinical waste, generally can be divided into burning disposal method and non-burning disposal method.
Burning method is generally that clinical waste is sent into Burning Room, and under thermal-flame effect, clinical waste, through super-dry, gasification, burning three phases, makes it be decomposed into gas and residue.But clinical waste often contains the heavy metal substance of a certain amount of flue dust, sour gas, volatilization gasification and toxic organic compound (dioxin and furans etc.) etc. in the flue gas that burning process produces, persistence organic pollutant wherein can cause huge pollution to environment, and harm is serious.
Non-burning method generally includes high steam treatment technology, Microwave Treatment technology and dry chemical treatment technology.High steam treatment technology is that clinical waste is placed in to metal pressure container (autoclave has enough compressive resistances) and utilizes in some way overheated steam to kill the wherein process of pathogenic microorganisms.Microwave Treatment technology is exactly to utilize the microwave action of certain frequency and wavelength, can be by this principle of most of microorganism killing, by microwave-excitation in advance broken and wetting discarded object to produce heat and to discharge steam, thereby complete the sterilizing to clinical waste.The technical process of chemical treatment method is generally that the clinical waste after fragmentation is mixed with chemosterilant (as clorox, oxirane, glutaraldehyde, pulverized limestone etc.), and stop time enough, in disinfecting process, organic substance is decomposed, infectiousness germ is killed or inactivation.
The processing of clinical waste mostly be take burning method as main in the world at present, and this method can produce dioxin persistence organic compound, environmental pollution is serious, and increasing country has promulgated new incinerator standard in the world, newly-built and existing medical waste incineration furnace must reach corresponding pollutant emission limit requirement, this also makes the application of burning method be restricted, but not can meeting with it advantage that best practicable technology (BAT) requires and suitable environment enforcement (BEP) requires, incineration treatment technology more and more comes into one's own, application potential is huge, but follow this technology can produce some VOCs (VOC) and stench discharge, this is the subject matter of this technology application of restriction, therefore solving VOC (VOC) and stench discharges and becomes the most important thing in this work.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, VOC (VOC) and foul gas purifier and method in the non-burning disposal process of a kind of clinical waste are provided, solve VOC and the stench emission problem of existing non-incineration treatment technology.
Technical purpose of the present invention is achieved by following technical proposals:
A non-burning disposal gas purification treating device, comprises gas buffer tank, heat exchanger, automatic temp controller, microbe stuffing layer, active carbon filler layer, light-catalyzed reaction layer, circulating water pool, water washing device, temperature acquisition apparatus, the first pump, the second pump, pressure gauge, sprinkler, reaction tower, dividing plate, gas pretreating device.
One end of described gas buffer tank is connected with exhaust pipe, the other end is connected by pipeline with gas pretreating device, gas ingredients checkout gear constantly is online set in described gas buffer tank, for detection of the corresponding content of component and each component thereof of waste gas in exhaust pipe.
In described gas pretreating device, heat exchanger, temperature acquisition apparatus and automatic temp controller are set, the temperature signal that is gathered waste gas by temperature acquisition apparatus sends automatic temp controller to, by automatic temp controller, control heat exchanger waste gas is carried out to heat exchange, and make to export EGT and maintain 25～35 ℃.
Described reaction tower arranges microbe stuffing layer, active carbon filler layer and light-catalyzed reaction layer from bottom to top, between described microbe stuffing layer and active carbon filler layer, sprinkler is set, and is provided with dividing plate above described sprinkler; At the bottom of the tower of described reaction tower, by pipeline, be connected with circulating water pool, described circulating water pool is connected with the first pump by pipeline, described the first pump is connected with sprinkler by pipeline, with the flushing liquor of realizing in circulating water pool, by sprinkler in tower, microbe stuffing layer is carried out to drip washing; The diameter of described dividing plate is consistent with the internal diameter of reaction tower, and on dividing plate, hole is evenly set, and 1-5mm for example, to realize the flowing from bottom to top of waste gas; Top in described reaction tower tower arranges the blower fan of bleeding, and for waste gas, realizes from bottom to top and flow power is provided in reaction tower.
Described reaction tower tower top is connected with the second pump by pipeline, and on pipeline, pressure gauge is set, and to monitor the gas pressure of pipeline, to avoid, pressure is excessive to be impacted to pipeline.
Described the second pump is connected with the bottom of water washing device by pipeline, at the top of described water washing device, is connected with wash-out water pipeline.
On the connecting line of described reaction tower and the second pump, at the air scavenge end of described water washing device, gas ingredients checkout gear is set respectively, with composition and the variation of gas-monitoring constantly.
When using, first waste gas enter gas buffer tank, and detect online the composition of waste gas, enter in gas pretreating device, carry out heat exchange with heat exchanger, and make to export EGT and maintain 25～35 ℃, by gas pretreating device, carry out the lower end entrance of temperature controlled waste gas by pipeline and reaction tower and carry out reaction tower inside, flow from bottom to top, successively by microbe stuffing layer, active carbon filler layer and light-catalyzed reaction layer, waste gas is got rid of through autoreaction top of tower after triple purifications in tower, through pipeline, enter the bottom of water washing device, from the top of water washing device, enter wash-out water simultaneously, to realize, the waste gas after processing is washed, sewage is got rid of from the bottom of water washing device, carry out sewage disposal, air after washing is emptying from the top of water washing device.
Described circulating water pool is connected with the first pump by pipeline, and described the first pump is connected with sprinkler by pipeline, with the flushing liquor of realizing in circulating water pool, by sprinkler in tower, microbe stuffing layer is carried out to drip washing.
In technical scheme of the present invention, described active carbon filler layer is intended to utilize active carbon to load in reaction tower as filler, then utilize the absorption property of active carbon to process each component in waste gas, for example Po Lam company active carbon is preced with in the north, Chengde company active carbon, Qingdao, or Changzhou Ke Jian company active carbon.
In technical scheme of the present invention, described light-catalyzed reaction layer is comprised of equally distributed photocatalysis unit in reaction tower, described photocatalysis unit is comprised of metal tub structure and the ultraviolet germicidal being arranged in metal tub structure, and the inner surface of described metal tub structure is coated with coating of titanium dioxide; In reaction tower, according to reaction tower internal diameter and height, and the diameter of each photocatalysis unit and height, in tower, space uniform distributes, to form light-catalyzed reaction layer; Owing to selecting metal tub structure, waste gas can be from bottom to up by light-catalyzed reaction layer, and under uviol lamp effect, utilize photocatalytic coating titanium dioxide to carry out photocatalysis treatment, for example win the fumed nano grade titanium dioxide P25 of a kind of high degree of dispersion of wound Degussa production.
In technical scheme of the present invention, the filler that forms microbe stuffing layer is selected ceramic-like filler, Raschig ring filler, Pall ring filler, alkene ladder ring packing or porous spherical filler.Select the bacterial classification of the pollutants (corresponding gas is had to better treatment effect) such as suitable treatment VOC and stench gather, cultivate and tame, when using, first carry out filler installation, pour the bacterial classification of having tamed into circulating water pool, composition proportion by nutrient solution adds nutriment, from the sprinkler spray of reaction tower and, the microorganism in liquid phase adheres to, grows, breeds at filling surface, cover gradually whole filling surface, finally form complete biomembrane.
Of the present invention, arrange in running, first carry out filler installation, pour the bacterial classification of having tamed into circulating water pool, composition proportion by nutrient solution adds nutriment, from the sprinkler spray of reaction tower and, start to pass into the waste gas of low concentration, so that microorganism adapts to exhaust environment in reaction tower, then progressively improve concentration and the air inflow of waste gas, to obtain the microorganism with advantage, microorganism in liquid phase adheres to, grows, breeds at filling surface simultaneously, covers gradually whole filling surface, finally forms complete biomembrane.Form the biomembranous while, be arranged on the light-catalyzed reaction layer on reaction tower top and the effect that active carbon filler layer plays purified treatment waste gas.
In technical scheme of the present invention, waste gas is introduced in deodorizing tower, the microbe stuffing layer of take in tower carries out purified treatment as main degraded unit to waste gas.Microorganism wherein, through strict screening, can tolerate maximum exhaust gas concentration, and the pollutants such as VOC, stench are had to good degradation capability.But generally, biological bacteria is in resting state, its activity will can be recovered driving after 3～5 hours, and during this period of time (being start-up), biological bacteria is very weak to the disposal ability of waste gas, therefore, has increased activated carbon adsorption layer and photocatalytic degradation device on the basis of microbial degradation, to make up microorganism, drip the defect of filter tower a little less than early stage disposal ability, make this system under triple guarantees, to waste gas, carry out thorough, stable deodorizing, purification; After driving 3～5 hours, biological bacteria reaches in activation recovering situation, and triple purifiers play a role simultaneously, and waste gas is carried out to thorough, stable deodorizing, purification.
Than prior art, beneficial effect of the present invention is: the porous ceramic grain filling surface bio-film colonization technology of (1) bio-trickling layer has solved the slow-footed shortcoming of common biological degradation method biochemical reaction well, the very applicable MEDICAL WASTE TREATMENT exhaust gas component large feature that fluctuates.VOC in tail gas and malodor components, through first absorption, after degraded; The technique of moment absorption, omnidistance degraded, can reach degradable.(2) safety assurance when setting of active carbon physical absorption layer is mainly used in that the equipment operation initial stage, biological active component activated not yet completely, has guaranteed the validity of equipment when equipment is installed test running effectively; Photocatalytic degradation layer the degraded that has guaranteed malodor components in active carbon layer eluent gas is set, guaranteed long-term operation and the security thereof of equipment.(3) three kinds of processing means are reasonably combined to control VOC and the malodor components in tail gas, than single method before, the former is more thorough to vent gas treatment, and stink is eliminated substantially, and VOCs clearance can reach more than 95%.
Accompanying drawing explanation
Fig. 1 is apparatus figure of the present invention, and wherein 1 is gas buffer tank, and 2 is heat exchanger, 3 is automatic temp controller, and 4 is microbe stuffing layer, and 5 is active carbon filler layer, 6 is light-catalyzed reaction layer, and 7 is circulating water pool, and 8 is water washing device, 9 is temperature acquisition apparatus, and 10 is the first pump, and 11 is the second pump, 12 is pressure gauge, and 13 is sprinkler, and 14 is reaction tower, 15 is dividing plate, and 16 is gas pretreating device.
The specific embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
The non-burning disposal gas purification treating device of clinical waste figure as shown in Figure 1, wherein 1 is gas buffer tank, 2 is heat exchanger, 3 is automatic temp controller, and 4 is microbe stuffing layer, and 5 is active carbon filler layer, 6 is light-catalyzed reaction layer, and 7 is circulating water pool, and 8 is water washing device, 9 is temperature acquisition apparatus, and 10 is the first pump, and 11 is the second pump, 12 is pressure gauge, and 13 is sprinkler, and 14 is reaction tower, 15 is dividing plate, and 16 is gas pretreating device.
One end of described gas buffer tank is connected with exhaust pipe, the other end is connected by pipeline with gas pretreating device, gas ingredients checkout gear constantly is online set in described gas buffer tank, for detection of the corresponding content of component and each component thereof of waste gas in exhaust pipe.
In described gas pretreating device, heat exchanger, temperature acquisition apparatus and automatic temp controller are set, the temperature signal that is gathered waste gas by temperature acquisition apparatus sends automatic temp controller to, by automatic temp controller, control heat exchanger waste gas is carried out to heat exchange, and make to export EGT and maintain 25～35 ℃.
Described reaction tower arranges microbe stuffing layer, active carbon filler layer and light-catalyzed reaction layer from bottom to top, between described microbe stuffing layer and active carbon filler layer, sprinkler is set, and is provided with dividing plate above described sprinkler; At the bottom of the tower of described reaction tower, by pipeline, be connected with circulating water pool, described circulating water pool is connected with the first pump by pipeline, described the first pump is connected with sprinkler by pipeline, with the flushing liquor of realizing in circulating water pool, by sprinkler in tower, microbe stuffing layer is carried out to drip washing; The diameter of described dividing plate is consistent with the internal diameter of reaction tower, and on dividing plate, hole is evenly set, and 1-5mm for example, to realize the flowing from bottom to top of waste gas; Top in described reaction tower tower arranges the blower fan of bleeding, and for waste gas, realizes from bottom to top and flow power is provided in reaction tower.
Described reaction tower tower top is connected with the second pump by pipeline, and on pipeline, pressure gauge is set, and to monitor the gas pressure of pipeline, to avoid, pressure is excessive to be impacted to pipeline.
Described the second pump is connected with the bottom of water washing device by pipeline, at the top of described water washing device, by pipeline, is connected with wash-out water.
On the connecting line of described reaction tower and the second pump, at the air scavenge end of described water washing device, gas ingredients checkout gear is set respectively, with composition and the variation (not marking in figure) of gas-monitoring constantly.
When using, first waste gas enter gas buffer tank, and detect online the composition of waste gas, enter in gas pretreating device, carry out heat exchange with heat exchanger, and make to export EGT and maintain 25～35 ℃, by gas pretreating device, carry out the lower end entrance of temperature controlled waste gas by pipeline and reaction tower and carry out reaction tower inside, flow from bottom to top, successively by microbe stuffing layer, active carbon filler layer and light-catalyzed reaction layer, waste gas is got rid of through autoreaction top of tower after triple purifications in tower, through pipeline, enter the bottom of water washing device, from the top of water washing device, enter wash-out water simultaneously, to realize, the waste gas after processing is washed, sewage is got rid of from the bottom of water washing device, carry out sewage disposal, air after washing is emptying from the top of water washing device.
When using, the flushing liquor that the circulation that utilizes circulating water pool, the first pump and sprinkler to form realizes in circulating water pool carries out drip washing by sprinkler in tower to microbe stuffing layer, and the bottom of sewage autoreaction tower is got rid of.
The microbe stuffing layer using selects haydite (particle diameter is generally 5～20 ㎜) to be prepared, as follows:
(1) bacterial classification collection---Tianjin discipline village sewage disposal plant aeration tank activated sludge;
(2) bacterial classification is cultivated and domestication---activated sludge is placed in to large beaker, add distilled water and nutrient solution, large beaker is put into incubator, under 30 ℃ of conditions, with oxygen increasing pump bubbling, carry out the aeration cultivation of 48h, original organic components in active mud is digested completely.Mixed liquor after aeration is cultivated filters, and lurid filtrate is joined in 250ml port grinding bottle, and then the aerobic shaken cultivation 48h of Ensure Liquid liquid, centrifugal, collects centrifuge tube bottom thalline.Repeat to tame 4 cycles, each cycle is the 30mg/L that successively decreases of the content of glucose wherein, and adds micro-benzene, toluene and Na
2s increases progressively from 10mg/L, increases 10mg/L at every turn.The bacteria suspension obtaining is placed in to 4 ℃ of refrigerators to be saved backup.The bacterial classification obtaining is like this to benzene and toluene, and hydrogen sulfide has certain tolerance and capacity of decomposition.This bacterial classification can be used as the bacterial classification of biofilm in biological packing tower, but still needs further domestication in packed tower, to strengthen toluene, benzene, H
2the capacity of decomposition of S.
(3) when using, first pottery is carried out to filler installation, pour the bacterial classification of having tamed into circulating water pool, composition proportion by nutrient solution adds nutriment, from the sprinkler spray of reaction tower and, the ceramics filling surface of flowing through starts to pass into the H of low concentration simultaneously
2s and toluene gas, H2S and toluene also flow through from packing layer, make the microorganism in each tower of bio-trickling filter adapt to H
2s and toluene gas.Then progressively improve concentration and the air inflow of foul gas, in this process, not only obtained processing the superior microorganism of foul gas, and made bio-trickling filter along highly producing different biofacies.Microorganism in liquid phase adheres to, grows, breeds at filling surface, covers gradually whole filling surface, finally forms complete biomembrane.Microorganism is cultivated the formula of nutrient solution, and (solvent is deionized water, mg/L): C for the nutrient solution prescription in circulating water pool and content
6h
12o
6180mg/L; (NH
4)
2sO
4100mg/L; KH
2pO
430mg/L; K
2sO
440mg/L; MgSO
4.7H
2o50mg/L; NaCl40mg/L; NaHCO
340mg/L; Fe
2(SO
4)
32mg/L; Cu (NO
3)
22mg/L.
(4) carrying out ceramic packing and forming the biomembranous while, be arranged on the light-catalyzed reaction layer on reaction tower top and the effect that active carbon filler layer plays purified treatment waste gas.
Select the commercially available active carbon filler of Qingdao hat Po Lam company to carry out packing layer filling.
Selecting win wound Degussa to produce commercially available titanium dioxide P25 coating applies and forms photocatalysis coating in surface of aluminum plate, select aluminium sheet to form tubular structure, inner surface titanium dioxide coating coating P25 at tubular aluminium sheet arranges ultraviolet germicidal in tubular structure, forms photocatalysis unit; In reaction tower, according to reaction tower internal diameter and height, and the diameter of each photocatalysis unit and height, in tower, space uniform distributes, to form light-catalyzed reaction layer.
In the removal process of tail gas deodorization and VOCs; the collection of tail gas is the key in design process; in order to reach the object of the operating environment of improving the non-burning process device of clinical waste operation site; must make all waste gases producing in MEDICAL WASTE TREATMENT process all by deodorization device, discharge as far as possible, otherwise not reach the object that environmental protection and deodorization and VOCs remove at all.Therefore tail gas deodorization device need to be used in conjunction with medical waste high temperature steam treatment device, from control program, guarantees the implementation result of this scheme.After tail gas VOCs is analyzed, draw, different sample composition difference are very large, and VOCs total content is at 300～1500mg/m
3between.H
2s content is at 0～1mg/m
3scope, content is very low; In gas phase, ammonia concentration is between 2.0～4.0mg/m3, and it discharges higher than grade III Standard, lower than secondary discharge standard.This control program is equally applicable to other removal processes of removing foul gas containing VOCs, is particularly suitable for gas componant fluctuation large, the occasion of complicated component.The setting of photocatalytic degradation layer is in order to guarantee the degraded of malodor components in active carbon layer eluent gas, guarantees long-term operation and the security thereof of equipment.
Embodiment mono-
The driving initial stage
1) from medical waste high temperature steam treatment device waste gas out, it is larger that it forms difference, before entering next step treating apparatus, VOCs content carried out to sample analysis, every 10min sampling once, obtains VOCs total content at 300～1100mg/m
3wherein the analysis result of 4 times is as follows:
For the first time: VOCs total content 538mg/m
3be roughly: benzene 210mg/m
3, toluene 115mg/m
3, ethylbenzene 53mg/m
3, dimethylbenzene 105mg/m
3, other aromatic compounds 18mg/m
3, chloroform 22mg/m
3, other low-carbon (LC) alkyl halides 15mg/m
3.
For the second time: VOCs total content 1156mg/m
3be roughly: benzene 562mg/m
3, toluene 267mg/m
3, ethylbenzene 131mg/m
3, dimethylbenzene 85mg/m
3, other aromatic compounds 55mg/m
3, chloroform 28mg/m
3, other low-carbon (LC) alkyl halides 28mg/m
3.
For the third time: VOCs total content 840mg/m
3be roughly: benzene 425mg/m
3, toluene 145mg/m
3, ethylbenzene 108mg/m
3, dimethylbenzene 88mg/m
3, other aromatic compounds 27mg/m
3, chloroform 14mg/m
3, other low-carbon (LC) alkyl halides 33mg/m
3.
The 4th time: VOCs total content 306mg/m
3be roughly: benzene 178mg/m
3, toluene 60mg/m
3, ethylbenzene 18mg/m
3, dimethylbenzene 31mg/m
3, other aromatic compounds 19mg/m
3, chloroform 6mg/m
3, other low-carbon (LC) alkyl halides 4mg/m
3.
Make waste gas pass into gas buffer tank.
2) surge tank voltage stabilizing waste gas out passes into automatic temp controller, and this device is comprised of heat exchanger and thermometer, can freely control the temperature of exit gas.Regulate this device to make to export EGT and maintain 25～35 ℃.
3) make the waste gas of temperature control pass into deodorizing tower lower end air inlet, deodorizing tower inside is divided into three sections, bottom drips filtering layer for microorganism, centre is active carbon filler layer, be light-catalyzed reaction layer above, deodorizing tower upper end is connected with the blower fan of bleeding, for waste gas flows power is provided in deodorizing tower.Waste gas is first by bio-trickling layer, and through sample analysis (interval 10min sampling), after dripping filtering layer, VOCs total content is at 200～800mg/m
3, wherein the analysis result of 4 times is as follows, and waste gas consists of:
For the first time: benzene 360mg/m
3, toluene 120mg/m
3, ethylbenzene 80mg/m
3, dimethylbenzene 50mg/m
3, other aromatic compounds 30mg/m
3, chloroform 19mg/m
3, other low-carbon (LC) alkyl halides 16mg/m
3.
For the second time: benzene 280mg/m
3, toluene 86mg/m
3, ethylbenzene 50mg/m
3, diformazan 33mg/m
3, other aromatic compounds 22mg/m
3, chloroform 14mg/m
3, other low-carbon (LC) alkyl halides 11mg/m
3.
For the third time: benzene 220mg/m
3, toluene 43mg/m
3, ethylbenzene 35mg/m
3, dimethylbenzene 16mg/m
3, other aromatic compounds 20mg/m
3, chloroform 12mg/m
3, other low-carbon (LC) alkyl halides 15mg/m
3.
The 4th time: benzene 409mg/m
3, toluene 111mg/m
3, ethylbenzene 90mg/m
3, dimethylbenzene 37mg/m
3, other aromatic compounds 30mg/m
3, chloroform 18mg/m
3, other low-carbon (LC) alkyl halides 18mg/m
3.
And then make waste gas by active carbon layer and light-catalyzed reaction degraded layer, more then by upper end, through blower fan, extracted out.
4) gas after deodorizing is passed into water scrubber, afterwards emptying by the upper end of tower with running water drip washing in water scrubber.Exit gas is detected, and its VOCs content is all below detectability (0.5mg/m3), and conservative estimation VOCs clearance reaches more than 95%.
Embodiment bis-
After driving to stablize
1) from medical waste high temperature steam treatment device waste gas out, it is larger that it forms difference, before entering next step treating apparatus, VOCs content carried out to sample analysis, every 10min sampling once, obtains VOCs total content at 300～1100mg/m
3, it forms with example one step (1).
Make waste gas pass into gas buffer tank.
2) surge tank voltage stabilizing waste gas out passes into automatic temp controller, and this device is comprised of heat exchanger and thermometer, can freely control the temperature of exit gas.Regulate this device to make to export EGT and maintain 25～35 ℃.
3) make the waste gas of temperature control pass into deodorizing tower lower end air inlet, deodorizing tower inside is divided into three sections, bottom drips filtering layer for microorganism, centre is active carbon filler layer, be light-catalyzed reaction layer above, deodorizing tower upper end is connected with the blower fan of bleeding, for waste gas flows power is provided in deodorizing tower.Waste gas is first by bio-trickling layer, through sample analysis (interval 10min sampling), after dripping filtering layer, its VOCs content is all below detectability (0.5mg/m3), conservative estimation VOCs clearance reaches more than 95%, and under equipment normal operation condition, the setting that biological adsorption drips filter bed just can meet design requirement, as long as equipment is no more than two weeks down time, Biotrickling filter does not need activation processing.
Above the present invention has been done to exemplary description; should be noted that; in the situation that not departing from core of the present invention, the replacement that is equal to that any simple distortion, modification or other those skilled in the art can not spend creative work all falls into protection scope of the present invention.
Claims (9)
1. the non-burning disposal gas purification treating device of clinical waste, is characterized in that, comprises gas buffer tank, heat exchanger, automatic temp controller, microbe stuffing layer, active carbon filler layer, light-catalyzed reaction layer, circulating water pool, water washing device, temperature acquisition apparatus, the first pump, the second pump, pressure gauge, sprinkler, reaction tower, dividing plate, gas pretreating device, wherein:
One end of described gas buffer tank is connected with exhaust pipe, the other end is connected by pipeline with gas pretreating device, gas ingredients checkout gear constantly is online set in described gas buffer tank, for detection of the corresponding content of component and each component thereof of waste gas in exhaust pipe;
In described gas pretreating device, heat exchanger, temperature acquisition apparatus and automatic temp controller are set, the temperature signal that is gathered waste gas by temperature acquisition apparatus sends automatic temp controller to, by automatic temp controller, control heat exchanger waste gas is carried out to heat exchange, and make to export EGT and maintain 25～35 ℃;
Described reaction tower arranges microbe stuffing layer, active carbon filler layer and light-catalyzed reaction layer from bottom to top, between described microbe stuffing layer and active carbon filler layer, sprinkler is set, and is provided with dividing plate above described sprinkler; At the bottom of the tower of described reaction tower, by pipeline, be connected with circulating water pool, described circulating water pool is connected with the first pump by pipeline, described the first pump is connected with sprinkler by pipeline, with the flushing liquor of realizing in circulating water pool, by sprinkler in tower, microbe stuffing layer is carried out to drip washing; Top in described reaction tower tower arranges the blower fan of bleeding, and for waste gas, realizes from bottom to top and flow power is provided in reaction tower;
Described reaction tower tower top is connected with the second pump by pipeline, and described the second pump is connected with the bottom of water washing device by pipeline, at the top of described water washing device, is connected with wash-out water pipeline.
2. the non-burning disposal gas purification treating device of a kind of clinical waste according to claim 1, is characterized in that, the diameter of described dividing plate is consistent with the internal diameter of reaction tower, and on dividing plate, hole is evenly set, to realize the flowing from bottom to top of waste gas.
3. the non-burning disposal gas purification treating device of a kind of clinical waste according to claim 2, is characterized in that, the diameter in the hole arranging on dividing plate is 1-5mm.
4. the non-burning disposal gas purification treating device of a kind of clinical waste according to claim 1, it is characterized in that, on the pipeline being connected with the second pump at reaction tower tower top, pressure gauge is set, to monitor the gas pressure of pipeline, to avoid, pressure is excessive to be impacted to pipeline; On the connecting line of described reaction tower and the second pump, at the air scavenge end of described water washing device, gas ingredients checkout gear is set respectively, with composition and the variation of gas-monitoring constantly.
5. the non-burning disposal gas purification treating device of a kind of clinical waste according to claim 1, it is characterized in that, described light-catalyzed reaction layer is comprised of equally distributed photocatalysis unit in reaction tower, described photocatalysis unit is comprised of metal tub structure and the ultraviolet germicidal being arranged in metal tub structure, and the inner surface of described metal tub structure is coated with coating of titanium dioxide; In reaction tower, be uniformly distributed photocatalysis unit, to form light-catalyzed reaction layer.
6. the non-burning disposal gas purification treating device of a kind of clinical waste according to claim 1, it is characterized in that, the filler that forms microbe stuffing layer is selected ceramic-like filler, Raschig ring filler, Pall ring filler, alkene ladder ring packing or porous spherical filler; Select the bacterial classification of the pollutants such as suitable treatment VOC and stench gather, cultivate and tame, when using, first carry out filler installation, pour the bacterial classification of having tamed into circulating water pool, composition proportion by nutrient solution adds nutriment, from the sprinkler spray of reaction tower and, the microorganism in liquid phase adheres to, grows, breeds at filling surface, cover gradually whole filling surface, finally form complete biomembrane.
7. the non-burning disposal gas purification treating device of a kind of clinical waste according to claim 6, is characterized in that, described microorganism is cultivated the formula of nutrient solution, and solvent is deionized water, mg/L:C
6h
12o
6180mg/L; (NH
4)
2sO
4100mg/L; KH
2pO
430mg/L; K
2sO
440mg/L; MgSO
4.7H
2o50mg/L; NaCl40mg/L; NaHCO
340mg/L; Fe
2(SO
4)
32mg/L; Cu (NO
3)
22mg/L.
8. the method for utilizing the described device of one of claim 1-7 to carry out gas purification processing, is characterized in that,
First carry out filler installation, pour the bacterial classification of having tamed into circulating water pool, composition proportion by nutrient solution adds nutriment, from the sprinkler spray of reaction tower and, start to pass into the waste gas of low concentration, so that microorganism adapts to exhaust environment in reaction tower, then progressively improve concentration and the air inflow of waste gas, to obtain the microorganism with advantage, the microorganism in liquid phase adheres to, grows, breeds at filling surface simultaneously, cover gradually whole filling surface, finally form complete biomembrane; Form the biomembranous while, be arranged on the light-catalyzed reaction layer on reaction tower top and the effect that active carbon filler layer plays purified treatment waste gas;
In equipment running process, first waste gas enter gas buffer tank, and detect online the composition of waste gas, enter in gas pretreating device, carry out heat exchange with heat exchanger, and make to export EGT and maintain 25～35 ℃, by gas pretreating device, carry out the lower end entrance of temperature controlled waste gas by pipeline and reaction tower and carry out reaction tower inside, flow from bottom to top, successively by microbe stuffing layer, active carbon filler layer and light-catalyzed reaction layer, waste gas is got rid of through autoreaction top of tower after triple purifications in tower, through pipeline, enter the bottom of water washing device, from the top of water washing device, enter wash-out water simultaneously, to realize, the waste gas after processing is washed, sewage is got rid of from the bottom of water washing device, carry out sewage disposal, air after washing is emptying from the top of water washing device, described circulating water pool is connected with the first pump by pipeline, and described the first pump is connected with sprinkler by pipeline, with the flushing liquor of realizing in circulating water pool, by sprinkler in tower, microbe stuffing layer is carried out to drip washing.
9. method of carrying out gas purification processing according to claim 8, it is characterized in that, in start-up, microbe stuffing layer is in resting state, with the light-catalyzed reaction layer on reaction tower top and active carbon filler layer, carry out the purified treatment of waste gas, to make up the defect of microbe stuffing layer a little less than early stage disposal ability; After driving 3～5 hours, microbe stuffing layer activity recovered, so that microbe stuffing layer, active carbon filler layer and light-catalyzed reaction layer can play a role in reaction tower simultaneously, waste gas carried out to thorough, stable deodorizing, purification.
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