CN206872600U - A kind of desulfurization wastewater zero discharge treatment device - Google Patents
A kind of desulfurization wastewater zero discharge treatment device Download PDFInfo
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- CN206872600U CN206872600U CN201720752800.8U CN201720752800U CN206872600U CN 206872600 U CN206872600 U CN 206872600U CN 201720752800 U CN201720752800 U CN 201720752800U CN 206872600 U CN206872600 U CN 206872600U
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Abstract
The utility model discloses a kind of desulfurization wastewater zero discharge treatment device, electrostatic precipitator is connected by connecting pipe including air preheater, electrostatic precipitator connects the entrance of wet desulfuration tower, the wastewater outlet of wet desulfuration tower connects sedimentation basin, and atomising device and sound wave generating device have been sequentially arranged on connecting pipe.Device provided by the utility model is atomized with hyperfrequency, the discrete collaboration of Frequency Adjustable high sound strong sound wave solves to realize the serious problems such as flying dust sedimentation and flue inner wall fouling in spray nozzle encrustation blocking existing for the zero emission treatment of desulfured waste water of separation of solid and liquid and flue by high temperature evaporation.
Description
Technical field
The utility model belongs to power plant desulfurization wastewater process field, and in particular to a kind of desulfurization wastewater zero discharge treatment device
And its processing method.
Background technology
With the progress and expanding economy of society, pollution of the thermal power plant to atmospheric environment is by the generally pass of people
Note, therefore the influence for effectively reducing pollutant emission to improve to environment is that China's energy field sustainable development is faced
Severe challenge.At present, existing flue gas desulfurization technique includes wet desulphurization and dry desulfurization etc..The wherein fortune of Wet Flue Gas Desulfurization Technique
With the most extensive.Wet process of FGD is the technological process that current 85% or so large thermal power plant in the world uses.Wet flue gas
For desulphurization system waste water because mercury, lead, nickel, arsenic and chromium content of beary metal are higher, the harm directly discharged is very big, general chemistry processing
Method is again excessively complicated, and needs constantly addition chemicals, labor intensive.After another desulfurization wastewater chemical treatment method processing
Waste water chlorion (there is no chemical agent to remove removing chloride at present) can not still remove.Take general desulfuration waste water treatment process
Waste water after processing is unable to dilution discharge according to relevant regulations, therefore can not comprehensively utilize.
The world today, water scarcity, will be one if desulfurization wastewater is become resource circulation utilization using certain technique
Part promote the well-being of mankind society thing.Conventional desulfurization waste water treatment process step is neutralized, flocculated nothing more than, precipitating and outer row.It is near several
Many desulfuration waste water treatment process year newly developed, such as evaporate, reuse, the technique such as clarification, though this kind of technique can be to desulfurization wastewater
Recycling have certain effect, but problem is relatively more, and as that need to newly increase, large number quipments, floor space are big, investment is big, technique stream
Journey is complicated, equipment failure rate is high, operational effect is undesirable, dehydrating effect is bad, specific resistance to filtration is inconvenient, exists outside waste water
Arrange phenomenon etc.., should by the industry for having a strong impact on various desulfuration waste water treatment process if these problems cannot solve well
With.
With country《Economizing energy law》、《Law on Environmental Protection》、《Water prevention and cure of pollution action plan》With corresponding with water, row
The promulgation of water fees policy (water resources taxes, drainage fee, exceeded take), and《Power industry Eleventh Five-Year Plan water-saving planning》Deng regulation
Progressively implementation, thermal power plant is used, displacement and water quality have strict index to limit.From the point of view of sustainable development,
Reach these targets, implement depth and economize on water and realize that waste water zero emission measure is imperative.
Desulfurization wastewater belongs in the class waste water of coal-burning power plant four one kind that dustiness is high, intractability is big.According to DL/T 5196
《Thermal power plant's Limestone-gypsum Wet Flue Gas Desulfurization Process waste water quality Con trolling index》Regulation, desulfurization wastewater can not use dilution method
Discharged after reducing pollutant concentration.Meanwhile desulfurization wastewater contains the Cl of high concentration-, there is certain corrosivity and be difficult to directly
Utilize.Therefore, the implementation of desulfurization wastewater zero-emission, has important practical significance.
The Chinese patent of Application No. 201110076844.0 discloses a kind of zero emission treatment of desulfured waste water, including
Following steps：1) desulfurization wastewater after desulfurizing tower desulfurization is discharged into preliminary sedimentation tank, initial gross separation is passed through in preliminary sedimentation tank, will be separated
The upper clear supernate gone out is transported in buffer pool through slurries pump；2) desulfurization wastewater in buffer pool is passed sequentially through into atomising device and quiet
Electric cleaner；3) solid content larger waste water in preliminary sedimentation tank bottom is transported to sludge buffer pool through sludge pump, in sludge buffer pool
The larger waste water of solid content be transported to filter press through another sludge pump；4) by the waste water after filtering through slurries pumped back preliminary sedimentation tank
In.
But there are the following problems for this zero emission treatment of desulfured waste water：
(1) mist droplet particle size is larger (100-200 μm), causes nozzle choking problems to take place frequently.
(2) distance is evaporated, causes wastewater treatment capacity on the low side.
(3) effective measures without prevention in time and the thing sedimentation of solution flue endoparticle.
(4) effective measures without prevention in time and removing flue inner wall particulate matter fouling.
The content of the invention
The purpose of this utility model is to provide a kind of brand-new desulfurization in order to overcome above the deficiencies in the prior art and give up
Water zero discharge processing unit and its processing method, the device is with hyperfrequency atomization plant, the discrete dress of Frequency Adjustable high sound strong sound wave
Collaboration is put to solve to realize that spray nozzle encrustation existing for the zero emission treatment of desulfured waste water of separation of solid and liquid blocks by high temperature evaporation
And the serious problems such as flying dust sedimentation and flue inner wall fouling in flue, effectively avoid boiler caused by being blocked due to ash deposit and slag buildup
The relevant issues such as units consumption increase, the passive blowing out of boiler controller system, realize energy-conserving and environment-protective and desulfurization wastewater zero-emission target comprehensively.
It is simple that the method technique of desulfurization wastewater processing is carried out using device provided above, saves human input, it is not necessary to add any
Chemicals, but also fume afterheat is made full use of, realize desulfurization wastewater zero-emission.
The technical solution of the utility model is as follows：
A kind of desulfurization wastewater zero discharge treatment device, including air preheater connect electrostatic precipitator by connecting pipe,
Electrostatic precipitator connects the entrance of wet desulfuration tower, the wastewater outlet connection sedimentation basin of wet desulfuration tower, wherein from air preheat
Device is to being sequentially arranged atomising device and sound wave generating device on the connecting pipe of electrostatic precipitator.
Further, described desulfurization wastewater zero discharge treatment device, sedimentation basin feed the water into atomization dress by delivery pump
Put includes air compressor machine, air accumulator and hyperfrequency atomizer as spraying water source, atomising device, and wherein hyperfrequency atomizer is set
It is placed in the inside of connecting pipe.
Further, described desulfurization wastewater zero discharge treatment device, the wastewater outlet connection dehydration dress of wet desulfuration tower
Put, dehydration device connection desulfurization wastewater clear water reserviors, desulfurization wastewater clear water reserviors connection sedimentation basin.
Further, described desulfurization wastewater zero discharge treatment device, sound wave generating device are high frequency sound wave generator, low
One or more of combinations in frequency sonic generator or Frequency Adjustable sonic generator.
Further, described desulfurization wastewater zero discharge treatment device, the water in sedimentation basin are pumped into mist by conveying
Metering distribution anti-block apparatus is passed through in makeup before putting；Metering distributes pressure gauge, flowmeter, valve of the anti-block apparatus by being installed on pipeline
Door composition, the real-time monitoring to each bye-pass wastewater flow is realized by pressure gauge, flowmeter, realized by valve to each
The regulation of bye-pass wastewater flow.
Further, described desulfurization wastewater zero discharge treatment device, hyperfrequency atomizer includes air inlet pipe, air inlet is blocked up
Head, resonant cavity, water inlet pipe, current deflecting pipe and (operating) water nozzle；Air inlet plug is arranged inside the gas outlet end of air inlet pipe, with entering
There is gap in the gas outlet end inwall of tracheae, form gas high pressure emission port；Resonant cavity is the structure with the cavity that caves in, altogether
The chamber that shakes sets in a manner of the cavity that caves in is relative with gas high pressure emission port and forms gap between gas high pressure emission port；Enter
Water pipe connects current deflecting pipe, and the water export end connection (operating) water nozzle of current deflecting pipe, the water spray outlet of (operating) water nozzle is arranged at gas
The adjacent position of body high pressure emission port.
Further, described desulfurization wastewater zero discharge treatment device, water export end and the water of current deflecting pipe spray
Diffusing piece is additionally provided between mouth, diffusing piece is the part with diffusing hole.
Further, described desulfurization wastewater zero discharge treatment device, current deflecting pipe and (operating) water nozzle are placed on air inlet
Guan Shang；Resonant cavity is oppositely arranged by the fix bar of connection below air inlet plug with gas high pressure emission port, and resonant cavity is socketed on
In fix bar；Current deflecting pipe takes engagement thread to be connected with air inlet pipe；(operating) water nozzle takes engagement thread to connect with current deflecting pipe
Connect；(operating) water nozzle takes engagement thread to be connected or be not connected to air inlet pipe；Resonant cavity takes engagement thread to be connected with fix bar.
The processing method of described desulfurization wastewater zero discharge treatment device, comprises the following steps：
Step 1, waste water is pumped into atomising device by conveying after the waste water of wet desulfuration tower is precipitated by sedimentation basin to make
For spray water source, atomising device produces hyperfrequency water by the coordinative role of air compressor machine, air accumulator and hyperfrequency atomizer
In mist air inlet preheater and the connecting pipe of electrostatic precipitator；
Step 2, by the high-temperature flue gas after air preheater during electrostatic precipitator is sent into, in connecting pipe first
By high-temperature flue gas by the rapid evaporating completely of moisture in waste water after atomization, the crystallization salt after cooling in waste water separates out, then
Smaller crystal fine grain is separated under the sound wave debunching action of sound wave generating device；
Step 3, after crystal fine grain reaches electrostatic precipitator removing together with other grits with flue gas, cleaning flue gases enter wet method
Desulfurizing tower is further processed.
Further, the processing method of described desulfurization wastewater zero discharge treatment device, hyperfrequency atomizer in step 1
Realize that Frequency Adjustable is atomized by adjusting the distance between air inlet plug and resonant cavity in spray process.
The utility model, which draws desulfurization wastewater, is connected to sedimentation basin, by the way that desulfurization wastewater is pumped into meter by conveying after precipitation
Amount distribution anti-block apparatus, together with compressed air, after metering distributes anti-block apparatus reasonable distribution, it is atomized and is sprayed by hyperfrequency
Mouth is sprayed onto in electrostatic precipitator gas approach.Waste water after atomization passes through the flue gas in electrostatic precipitator entrance connecting pipe
Rapid evaporation.The dissolubility salt in waste water crystallizes precipitation in evaporation process simultaneously, and is removed with the ash in flue gas in electrostatic
It is captured in dirt device.The crystal salt that sound wave generating device sends sound wave controlled precipitation is in discrete state, avoids in connecting pipe
Fly ash granule settles and flue inner wall fouling and clogging.Metering distribution anti-block apparatus, can in time monitor on-line, adjust each spray gun
Feed liquor, the flow of gas and pressure, it is ensured that the safe operation of equipment.
Beneficial effect：
1st, the utility model very easily can carry out zero discharge treatment to desulfurization wastewater, and technique is simple, it is not necessary to
Using any chemicals, manpower is saved.
2nd, the utility model makes full use of fume afterheat, is evaporated the waste water of heavily contaminated substantially, realizes separation of solid and liquid, and change
The humidity that kind flue gas enters before dust arrester, be advantageous to improve the dust removing effects of dust arrester.
3rd, in existing desulfurization wastewater zero-discharge technology, the salinity crystal obtained by atomization, high temperature evaporation is realized admittedly
After liquid separation, cause nozzle and flue inner wall ash deposit and slag buildup to block, cause the increase of boiler controller system energy consumption, passive blowing out etc. to be difficult to gram
The problem of taking.In the present invention, the salinity crystal fine grain in waste water, the contaminant particles in flue gas are strong the high strong sound wave of Frequency Adjustable
Under strong effect, discrete phenomena constantly occurs, such design can be avoided effectively in nozzle and flue inner wall fouling and clogging.
4th, system architecture of the present utility model is compact, and method is implemented simply, and can realize waste water zero truly
Discharge, not only environmental protection but also safety, had promotional value.
5th, the nozzle atomization particle diameter of the more traditional gas-liquid two-phase flow of hyperfrequency atomizer is smaller, and the uniformity is more preferable, atomization effect
Rate is higher, shortens evaporation time in flue, has anti-clogging advantage.
Brief description of the drawings
Fig. 1 is the desulfurization wastewater zero discharge treatment schematic device described in the utility model embodiment 1；
Fig. 2 is the desulfurization wastewater zero discharge treatment schematic device described in the utility model embodiment 2；
Fig. 3 is the hyperfrequency atomizer schematic diagram described in the utility model embodiment 2；
Fig. 4 is the hyperfrequency atomizer schematic diagram described in the utility model embodiment 3；
Fig. 5 is diffusing piece schematic diagram in the hyperfrequency atomizer described in the utility model embodiment 3；
In figure 1 above-Fig. 5,1 is air preheater, and 2 be electrostatic precipitator, and 3 be wet desulfuration tower, and 4 be sedimentation basin, and 5 are
Atomising device, 51 be air inlet pipe, and 52 be air inlet plug, and 53 be resonant cavity, and 54 be water inlet pipe, and 55 be current deflecting pipe, and 56 be water
Nozzle, 57 be diffusing piece, and 6 be sound wave generating device, and 7 be dehydration device, and 8 be desulfurization wastewater clear water reserviors, and 9 is anti-blocking for metering distribution
Device.
Embodiment：
Embodiment 1
A kind of desulfurization wastewater zero discharge treatment device is present embodiments provided, as shown in figure 1, logical including air preheater 1
Connecting pipe connection electrostatic precipitator 2 is crossed, electrostatic precipitator 2 connects the entrance of wet desulfuration tower 3, the waste water of wet desulfuration tower 3
Outlet connection sedimentation basin 4, wherein from air preheater 1 to being sequentially arranged atomising device 5 on the connecting pipe of electrostatic precipitator 2
With sound wave generating device 6.Sound wave generating device 6 can be high frequency sound wave generator, low-frequency sound generator or Frequency Adjustable sound wave
One or more of combinations in generator；Sedimentation basin 4 feeds the water into atomising device 5 by delivery pump and is used as spraying water source.
The desulfurization wastewater of wet desulfuration tower in use, is drawn be connected to sedimentation basin first, pass through precipitation by apparatus above
Waste water is pumped to atomising device 5 by conveying afterwards and is used as atomization water source, the water after atomization is connected by electrostatic precipitator entrance
Flue gas in pipeline evaporates rapidly.The dissolubility salt in waste water crystallizes precipitation in evaporation process simultaneously, and with flue gas
Ash be captured together in electrostatic precipitator.The crystal salt that sound wave generating device 6 sends sound wave controlled precipitation is in discrete shape
State, fly ash granule sedimentation and flue inner wall fouling and clogging in connecting pipe are avoided, the crystallization salt grain then separated out is through electrostatic precipitation
Device 2 removes.
Embodiment 2
The present embodiment improves for a kind of of embodiment 1, as shown in Fig. 2 the water in sedimentation basin 4 is pumped into atomization by conveying
By metering distribution anti-block apparatus 9 before device 5；The wastewater outlet connection dehydration device 7 of wet desulfuration tower 3, dehydration device 7 connect
Desulfurization wastewater clear water reserviors 8, desulfurization wastewater clear water reserviors 8 connect sedimentation basin 4, and atomising device 5 includes air compressor machine, air accumulator and hyperfrequency
Atomizer, wherein hyperfrequency atomizer are arranged at the inside of connecting pipe；Hyperfrequency atomizer as shown in figure 3, including
Air inlet pipe 51, air inlet plug 52, resonant cavity 53, water inlet pipe 54, current deflecting pipe 55 and (operating) water nozzle 56；Air inlet plug 52 is arranged at
Inside the gas outlet end of air inlet pipe 51, gap be present with the gas outlet end inwall of air inlet pipe 51, form gas high pressure transmitting
Mouthful；Resonant cavity 53 is the structure with the cavity that caves in, and resonant cavity 53 is in a manner of the cavity that caves in is relative with gas high pressure emission port
Set and form gap between gas high pressure emission port；Water inlet pipe 54 connects current deflecting pipe 55, the water of current deflecting pipe 55
Flow export end connects (operating) water nozzle 56, and the water spray outlet of (operating) water nozzle 56 is arranged at the adjacent position of gas high pressure emission port.Metering point
It is made up of the pressure gauge, flowmeter, valve installed on pipeline with anti-block apparatus (9), is realized by pressure gauge, flowmeter to each
The real-time monitoring of individual bye-pass wastewater flow, the regulation to each bye-pass wastewater flow is realized by valve.
The desulfurization wastewater zero discharge treatment device that the present embodiment provides is set by hyperfrequency atomizer in atomising device 5
Put so that it can produce hyperfrequency spraying in use, drastically be subtracted by circulation area from air inlet pipe 51 using air-flow
Small gas high pressure emission port, launch to form jet after gas compression, can be by adjusting the stream of gas in air inlet pipe 51
Speed adjusts effluxvelocity, and when jet velocity reaches velocity of sound, shock wave is formed in gas high pressure emission port, and by being arranged at gas
The resonant cavity 53 of body high pressure emission port relative position, when shock wave is in the cavity that caves in for entering resonant cavity 53, due to running into bluff body,
Produce high pressure pulsation, the high pressure pulsation there is certain frequency, that is, form high strong sound wave, when resonant cavity 53 relative to
During the relative position regulation of gas high pressure emission port, the high strong sound wave of Frequency Adjustable is formed.Current from water inlet pipe 54 flow into when, from water
Nozzle 56, which sprays, forms spraying, and this is sprayed at the high-strength sound wave effect lower moment that gas high pressure emission port is sent and is torn, and crushes
For particulate form, atomizing effect is improved, resonant cavity 53 can be formed relative to the relative position regulation of gas high pressure emission port can
The high-strength atomizing effect of frequency modulation.
Embodiment 3
The present embodiment is the improvement on the basis of embodiment 2, as shown in figure 4, the current deflecting pipe of hyperfrequency atomizer
55 and (operating) water nozzle 56 be placed in air inlet pipe 51；The fix bar and gas high pressure that resonant cavity 53 passes through the connection of the lower section of air inlet plug 52
Emission port is oppositely arranged, and resonant cavity 53 is socketed in fix bar；Current deflecting pipe 55 takes engagement thread to be connected with air inlet pipe 51；
(operating) water nozzle 56 takes engagement thread to be connected with current deflecting pipe 55；(operating) water nozzle 56 and air inlet pipe 51 take engagement thread to be connected or not
Connection；Resonant cavity 53 takes engagement thread to be connected with fix bar.Between the water export end of current deflecting pipe 55 and (operating) water nozzle 56
Diffusing piece 57 is additionally provided with, diffusing piece 57 is the part (such as Fig. 5) with diffusing hole, and the water that enter (operating) water nozzle 56 can be played
Diffusing acts on, and improves the homogeneity of spraying.
The processing method for the desulfurization wastewater zero discharge treatment device that the present embodiment provides, comprises the following steps：
Step 1, waste water is pumped into atomising device by conveying after the waste water of wet desulfuration tower is precipitated by sedimentation basin to make
For spray water source, atomising device produces hyperfrequency water by the coordinative role of air compressor machine, air accumulator and hyperfrequency atomizer
In mist air inlet preheater and the connecting pipe of electrostatic precipitator；
Step 2, by the high-temperature flue gas after air preheater during electrostatic precipitator is sent into, in connecting pipe first
By high-temperature flue gas by the rapid evaporating completely of moisture in waste water after atomization, the crystallization salt after cooling in waste water separates out, then
Smaller crystal fine grain is separated under the sound wave debunching action of sound wave generating device；
Step 3, after crystal fine grain reaches electrostatic precipitator removing together with other grits with flue gas, cleaning flue gases enter wet method
Desulfurizing tower is further processed.
Desulfurization wastewater zero discharge treatment device provided by the utility model and its processing method, it is purified using desulfurization wastewater
Afterwards directly as atomization water source, the high-strength atomizing effect of Frequency Adjustable is produced using hyperfrequency atomizer, is flashed by high temperature, superelevation
Frequency atomization and sound wave debunching action separate crystallization salt and harmful ion in desulfurization wastewater well, realize desulfurization wastewater
Zero-emission.
Claims (8)
1. a kind of desulfurization wastewater zero discharge treatment device, it is characterised in that including air preheater（1）Connected by connecting pipe
Electrostatic precipitator（2）, electrostatic precipitator（2）Connect wet desulfuration tower（3）Entrance, wet desulfuration tower（3）Wastewater outlet connect
Connect sedimentation basin（4）, wherein from air preheater（1）To electrostatic precipitator（2）Connecting pipe on be sequentially arranged atomising device
（5）And sound wave generating device（6）.
2. desulfurization wastewater zero discharge treatment device according to claim 1, it is characterised in that sedimentation basin（4）Pass through conveying
Pump feeds the water into atomising device（5）As spraying water source, atomising device（5）It is atomized and sprays including air compressor machine, air accumulator and hyperfrequency
Mouth, wherein hyperfrequency atomizer are arranged at the inside of connecting pipe.
3. desulfurization wastewater zero discharge treatment device according to claim 1, it is characterised in that wet desulfuration tower（3）It is useless
Water out connects dehydration device（7）, dehydration device（7）Connect desulfurization wastewater clear water reserviors（8）, desulfurization wastewater clear water reserviors（8）Connection
Sedimentation basin（4）.
4. desulfurization wastewater zero discharge treatment device according to claim 1, it is characterised in that sound wave generating device（6）For
One or more of combinations in high frequency sound wave generator, low-frequency sound generator or Frequency Adjustable sonic generator.
5. desulfurization wastewater zero discharge treatment device according to claim 2, it is characterised in that sedimentation basin（4）In water lead to
Cross conveying and be pumped into atomising device（5）It is preceding to distribute anti-block apparatus by metering（9）；Metering distribution anti-block apparatus（9）By in pipeline
Pressure gauge, flowmeter, the valve composition of upper installation, the reality to each bye-pass wastewater flow is realized by pressure gauge, flowmeter
When monitor, pass through valve and realize regulation to each bye-pass wastewater flow.
6. desulfurization wastewater zero discharge treatment device according to claim 2, it is characterised in that hyperfrequency atomizer includes
Air inlet pipe（51）, air inlet plug（52）, resonant cavity（53）, water inlet pipe（54）, current deflecting pipe（55）And (operating) water nozzle（56）；Air inlet
Plug（52）It is arranged at air inlet pipe（51）Gas outlet end inside, with air inlet pipe（51）Gas outlet end inwall exist between
Gap, form gas high pressure emission port；Resonant cavity（53）For the structure with the cavity that caves in, resonant cavity（53）With cavity and the gas of caving in
The relative mode of body high pressure emission port sets and forms gap between gas high pressure emission port；Water inlet pipe（54）Connection current are led
Xiang Guan（55）, current deflecting pipe（55）Water export end connection (operating) water nozzle（56）, (operating) water nozzle（56）Water spray outlet be arranged at
The adjacent position of gas high pressure emission port.
7. desulfurization wastewater zero discharge treatment device according to claim 6, it is characterised in that current deflecting pipe（55）Water
Flow export end and (operating) water nozzle（56）Between be additionally provided with diffusing piece（57）, diffusing piece（57）For the part with diffusing hole.
8. desulfurization wastewater zero discharge treatment device according to claim 6, it is characterised in that current deflecting pipe（55）And water
Nozzle（56）It is placed on air inlet pipe（51）On；Resonant cavity（53）Pass through air inlet plug（52）The fix bar of lower section connection and gas are high
Pressure loophole is oppositely arranged, resonant cavity（53）It is socketed in fix bar；Current deflecting pipe（55）With air inlet pipe（51）Take screw thread
Mode connects；(operating) water nozzle（56）With current deflecting pipe（55）Engagement thread is taken to connect；(operating) water nozzle（56）With air inlet pipe（51）Adopt
Engagement thread is taken to connect or be not connected to；Resonant cavity（53）Engagement thread is taken to be connected with fix bar.
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| CN107140777A (en) * | 2017-06-27 | 2017-09-08 | 南京常荣声学股份有限公司 | A kind of desulfurization wastewater zero discharge treatment device and its processing method |
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| CN107140777A (en) * | 2017-06-27 | 2017-09-08 | 南京常荣声学股份有限公司 | A kind of desulfurization wastewater zero discharge treatment device and its processing method |
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