CN112697540A - Short pipe self-circulating mercury sampling bottle for fixed pollution source waste gas - Google Patents
Short pipe self-circulating mercury sampling bottle for fixed pollution source waste gas Download PDFInfo
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- CN112697540A CN112697540A CN202110020941.1A CN202110020941A CN112697540A CN 112697540 A CN112697540 A CN 112697540A CN 202110020941 A CN202110020941 A CN 202110020941A CN 112697540 A CN112697540 A CN 112697540A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
- G01N2001/2217—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption using a liquid
Abstract
The invention relates to the technical field of environmental monitoring, in particular to a self-circulation mercury sampling bottle with a fixed pollution source waste gas short pipe. The method is characterized in that: the device comprises a gas outlet pipe, a gas inlet pipe, a short pipe self-circulation type mercury sampling bottle body, a connecting through-flow pipe and a spherical condensation descending circulation pipe, wherein ice water with the temperature of 0-4 ℃ continuously flows through an outer sleeve of the spherical condensation descending circulation pipe; the gas inlet pipe is directly inserted into the bottom of the short self-circulation mercury sampling bottle body, the bottom end of the gas inlet pipe is welded with a porous screen plate, the opening area of the porous screen plate is equivalent to the section area of the gas inlet pipe, and gas flow is sprayed out by uniform ultrafine bubbles after impacting the porous screen plate.
Description
Technical Field
The invention relates to the technical field of environmental monitoring, in particular to a self-circulation mercury sampling bottle with a fixed pollution source waste gas short pipe.
Background
The coal is one of the largest emission sources of mercury in the atmosphere in China, and in the combustion process of the coal, the mercury in the coal is discharged to the atmosphere along with flue gas and mainly exists in 3 forms: gaseous elemental mercury (Hg)0) Gaseous divalent mercury (Hg)2+) And particulate mercury. The existing absorption bottle for sampling the mercury in the waste gas of the fixed pollution source is a large-scale bubble absorption tube, a certain amount of absorption liquid is filled in the absorption tube of the large-scale bubble absorption tube, the gas is led into a small hole at the tube end below the liquid level by a glass thin tube to form a small bubble to enter the absorption liquid, the absorption bottle is mainly used for absorbing gaseous or steam substances contained in the waste gas, the waste gas can be quickly diffused into the absorption liquid, the gas-liquid mass transfer exchange is realized, the absorption efficiency of the mercury is better, but the sampling flow range needs to be controlled because the gas can be quicklyThe inertia of molecules is small, and under the condition of rapid air exhaust, pollutants are easy to escape after being exhausted by the flue gas sampler, so that the flue gas sampler is usually set to be at a fixed sampling flow of 0.3L/min, the consistency of the flue gas flow velocity in a chimney cannot be realized, parallel constant-speed sampling is difficult to complete, and mercury adsorbed on particles in the flue gas cannot be collected, so that the accuracy of data is influenced. The Chinese invention patent (with the patent number of CN201910943697.9, the patent name is a mercury sampling device in fixed pollution source flue gas) discloses a mercury sampling device in fixed pollution source flue gas, which is characterized in that: comprises a constant temperature sampling gun, a constant temperature filter box, an ice bath absorption bottle box, a dehumidifying device, a sampling controller and a sampling air pump; the sampling head of the constant-temperature sampling gun extends into the flue, the outlet of the constant-temperature sampling gun is connected with the inlet of the constant-temperature filter box, the outlet of the constant-temperature filter box is connected with the inlet of the ice bath absorption bottle box, the outlet of the ice bath absorption bottle box is connected with the inlet of the dehumidifying device, the outlet of the dehumidifying device is connected with the inlet of the sampling controller, and the sampling air pump is further connected with the sampling controller; the ice bath absorption bottle box is provided with 14 absorption bottles, 7 absorption bottles are connected in series to form a group for sampling, and 14 absorption bottles are used for carrying out two groups of parallel sampling at a time; the serial 7 absorption bottles are numbered from left to right: the flue gas absorption device comprises a first absorption bottle, a second absorption bottle, a third absorption bottle, a fourth absorption bottle, a fifth absorption bottle, a sixth absorption bottle and a seventh absorption bottle, wherein the first absorption bottle, the second absorption bottle and the third absorption bottle are internally provided with diatomite-based composite adsorbents for trapping oxidized mercury in flue gas, and the fourth absorption bottle is internally provided with diatomite-based composite adsorbents for absorbing acid gas in the flue gas; and the fifth absorption bottle, the sixth absorption bottle and the seventh absorption bottle are internally provided with diatomite-based composite adsorbents for trapping gaseous element mercury in the flue gas. The Chinese invention patent (with the patent number of CN 201710133959.6, the patent name is a constant-speed sampling device and a constant-speed sampling method for fixed pollution source granular mercury and gaseous mercury) discloses a constant-speed sampling device and a constant-speed sampling method for fixed pollution source granular mercury and gaseous mercury, wherein the device comprises: sampling nozzle connected in sequenceThe device comprises a sampling gun, a cyclone separator, an ash bucket, a fine particle filter, a gaseous mercury sampling pipe, a refrigerator, a dryer, a flow controller, an activated carbon mercury remover, a vacuum pump and an accumulation volume meter. Wherein, the sampling gun is arranged in the heating sleeve, and the cyclone separator, the fine particle filter and the activated carbon adsorption tube are arranged in the heat insulation box; the invention also discloses a sampling method of the device; the invention has the following advantages: 1. simultaneously collecting particle mercury and gaseous mercury samples; 2. the sampling process is insulated, so that mercury loss and mercury form conversion are prevented, and the sampling representativeness is improved; 3. two-stage dust removal of the cyclone separator and the fine particle filter ensures the representativeness of the sample in a high dust-containing environment. 4. The volume flow controller ensures constant-speed sampling; and 5, an activated carbon mercury remover is arranged at the rear part to prevent residual mercury from being discharged into the atmosphere.
In the prior art 1, a diatomite-based composite adsorbent is adopted to replace an absorption liquid in the existing standard method, and compared with a mercury chemical reaction absorption method in a solution of the existing standard method, the efficiency of physical adsorption, sequestration, mercury and compounds of the mercury is lower, because ionic reaction and redox reaction with acidic potassium permanganate are carried out in the method for collecting and measuring gaseous mercury and granular mercury, and meanwhile, the method of serially connecting a plurality of groups of adsorbent absorption bottles filled with the adsorbent can cause along-process pressure drop increase, and if a monitoring site with larger dust content is met, the micropores of the adsorbent are blocked by smoke dust, and a sampling air pump cannot work. In prior art 2, a cyclone separator, a fine particle filter and an activated carbon adsorption tube are added to capture mercury particles and try to remove the particles in advance, so that the problem that the sampling suction pump cannot work due to blocking of micropores of the adsorbent by smoke dust is avoided, but the method has the same problem as that in prior art 1, namely, compared with a mercury chemical reaction absorption method in solution of an existing standard method, the efficiency of physical adsorption and sequestration of mercury and compounds thereof by the adsorbent is lower.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a self-circulation mercury sampling bottle with a short pipe for fixing pollution source waste gas, which is characterized in that: comprises a gas outlet pipe, a gas inlet pipe, a short pipe self-circulation mercury sampling bottle body, a connecting draft pipe and a spherical condensation descending circulating pipe, the short tube self-circulation type mercury sampling bottle body is designed to be thick at the upper part and thin at the lower part, the absorption liquid column can be heightened due to the thin and thin lower part of the short tube self-circulation type mercury sampling bottle body, the gas to be detected can be fully contacted with the absorption liquid, the bubbles which are overturned can be rapidly destroyed due to the expansion of the upper part of the short tube self-circulation type mercury sampling bottle body, ice water with the temperature of 0-4 ℃ can continuously flow through the outer sleeve of the spherical condensation descending circulation tube, the gas outlet pipe and the gas inlet pipe penetrate through the quartz glass plug, the quartz glass plug is matched with the short pipe self-circulation type mercury sampling bottle body in a grinding mode, the upper end of the spherical condensation descending circulating pipe is connected with the upper portion of the short pipe self-circulation type mercury sampling bottle body through the connecting through pipe, and the lower end of the spherical condensation descending circulating pipe is connected with the bottom of the short pipe self-circulation type mercury sampling bottle body in a through mode.
The short tube self-circulation type mercury sampling bottle body, the connecting draft tube and the spherical condensation descending circulating tube form a natural circulation loop, the gas inlet tube is directly inserted into the bottom of the short tube self-circulation type mercury sampling bottle body, the bottom end of the gas inlet tube is welded with a porous screen plate, the opening area of the porous screen plate is equivalent to the section area of the gas inlet tube, and airflow is ejected out by uniform ultrafine bubbles after impacting the porous screen plate.
The inventor finds that cold atomic absorption spectrophotometry (temporary) for measuring mercury in waste gas from fixed pollution sources in the department of ecological environment (HJ/542) -2009) indicates that two large bubble absorption bottles containing 10ml of absorption liquid respectively are connected in series with a flue gas sampler, the absorption liquid is 0.1mol/L potassium permanganate and 10% sulfuric acid which are mixed in equal volume, sampling is carried out at the flow rate of 0.3L/min for 5-30 min, after sampling is finished, samples in the absorption liquid are recovered and subjected to volume fixing, then analysis of the samples is carried out, and the analysis method adopts cold atomic absorption spectrophotometry. The method for sampling the mercury in the waste gas of the fixed pollution source has the following defects: firstly, it is possible that no particulate mercury can be collected, and regarding the particulate sampling and measuring technique, the method for measuring particulate matter in exhaust gas from stationary pollution sources (GB/T16157-1996) states that a particulate matter sampling tube is extended into a flue or an exhaust cylinder from a sampling hole, a sampling nozzle is placed on a measuring point, and a certain amount of dust-containing gas is extracted according to the particulate matter equal-speed sampling principle against the gas flow, and according to the particulate matter captured on the filter cylinder of the sampling tubeThe concentration of the particulate matters in the exhaust gas is calculated by the collected particulate matters and the quantity of the gas extracted at the same time, and because the concentration distribution of the particulate matters on the sampling section of a flue or an exhaust funnel is not uniform, and the parameters of the flue gas such as the flow speed also change continuously, a method of constant-speed sampling and multi-point sampling is usually adopted to obtain a representative particulate matter sample, so that the sampling at a fixed flow rate of 0.3L/min cannot meet the requirement of constant-speed sampling, and the particulate matters slide through a sampling pipe orifice due to the inertia factor and are not collected; secondly, the sampling pipe is not heated, and mercury vapor is easy to condense and adhere to the sampling pipe; thirdly, the absorption bottle does not adopt a condensation measure, 10ml of absorption liquid is possible to boil and escape, and the gaseous mercury is lost along with the absorption liquid; fourthly, if a constant-speed sampling method is adopted, when the flue gas flow rate of the flue or the exhaust funnel is higher, the gas pump is easy to be extracted and separated by the flue gas sampler and escape without fully reacting with the absorption liquid because the inertia of the gaseous mercury is small under the condition of rapid gas extraction; fifthly, only single equal-volume mixed absorption liquid of 0.1mol/L potassium permanganate and 10 percent sulfuric acid is adopted, SO that the absorption liquid can not deal with high SO inevitably2And (5) monitoring environment of concentration.
The inventor finds that the commonly used gaseous pollutant sampling method comprises a solution absorption method, an adsorbent retention method, a low-temperature condensation method and a natural sedimentation method, and the solution absorption method comprises two ways of increasing the using amount of the absorption liquid and prolonging the retention time of mercury in the absorption liquid in order to improve the efficiency of the absorption liquid for absorbing granular mercury and gaseous mercury. Increasing the absorption liquid quantity can influence the sample in follow-up absorption liquid and retrieve and constant volume work, because there is the restriction that detects the limit to mercury concentration detection analysis instrument method, when sample solution concentration is less than detecting the limit, degree of accuracy and precision receive the influence, and quality assurance and quality control just can't implement. The method is one of feasible methods for prolonging the retention time of mercury in absorption liquid by improving the design of an absorption bottle, according to the working principle of natural circulation, a circulation loop is designed in the absorption bottle, so that the absorption liquid flows in the circulation loop in the absorption bottle in a natural circulation manner, bubbles flow along with the absorption liquid in a natural circulation manner until the bubbles grow into larger bubbles and then are broken on the liquid surface, and meanwhile, a condensing device is additionally arranged outside a descending pipe, so that the time for the absorption liquid to fully contact with granular mercury and gaseous mercury during cooling and perform mass transfer reaction is prolonged, and the retention time of the mercury in the absorption liquid can be prolonged even if the consumption of the absorption liquid is not increased.
The inventor finds that in order to solve the problem that mercury vapor is easy to condense and adhere to a sampling tube, a constant-temperature quartz glass sampling tube is adopted, the temperature of the sampling tube is controlled at 120 ℃, granular mercury and gaseous mercury are collected on the premise of constant sampling, the following seven sampling bottles are sequentially connected in series according to the sequence of sequentially collecting the granular mercury, the gaseous bivalent mercury and the gaseous elemental mercury, the granular mercury is collected by one circulating fluidized bed type mercury sampling bottle, and absorption liquid is 50ml of 10% potassium hydroxide solution; collecting gaseous bivalent mercury by three suspension basket self-circulation mercury sampling bottles, wherein the absorption liquid is 50ml of 1.0mol/L potassium chloride solution; gaseous elemental mercury is collected by a short-tube self-circulation mercury sampling bottle and two long-tube self-circulation mercury sampling bottles, and absorption solutions are respectively 50ml of a mixed solution of 5% nitric acid and 10% hydrogen peroxide in equal volume and 50ml of a mixed solution of 0.1mol/L potassium permanganate and 10% sulfuric acid in equal volume.
The inventor finds that the short tube self-circulation type mercury sampling bottle comprises a gas outlet tube, a gas inlet tube, a short tube self-circulation type mercury sampling bottle body, a connecting through-flow tube and a spherical condensation descending circulating tube, wherein the short tube self-circulation type mercury sampling bottle body is designed to be thick at the upper part and thin at the lower part, an absorption liquid column can be heightened by the thin and thin lower part of the short tube self-circulation type mercury sampling bottle body, a detected gas can be fully contacted with the absorption liquid, bubbles which are overturned can be rapidly broken by the expansion of the upper part of the short tube self-circulation type mercury sampling bottle body, ice water with the temperature of 0-4 ℃ continuously flows through an outer sleeve of the spherical condensation descending circulating tube, the gas outlet tube and the gas inlet tube penetrate through a quartz glass plug, the quartz glass plug is matched with the short tube self-circulation type mercury sampling frosted bottle body, and the upper, the lower end of the spherical condensation descending circulating pipe is connected with the bottom of the short pipe self-circulation type mercury sampling bottle body for through flow. The short tube self-circulation type mercury sampling bottle body, the connecting draft tube and the spherical condensation descending circulating tube form a natural circulation loop, the gas inlet tube is directly inserted into the bottom of the short tube self-circulation type mercury sampling bottle body, the bottom end of the gas inlet tube is welded with a porous screen plate, the opening area of the porous screen plate is equivalent to the section area of the gas inlet tube, and airflow is ejected out by uniform ultrafine bubbles after impacting the porous screen plate. The short tube self-circulation type mercury sampling bottle body is marked with scales, absorption liquid is added to enable the liquid level of the short tube self-circulation type mercury sampling bottle body to be accurate to the scale position, the scale position is 1cm higher than that of the connecting through flow tube, the short tube self-circulation type mercury sampling bottle body is required to be horizontally placed, the absorption liquid cannot submerge the connecting through flow tube due to the fact that the short tube self-circulation type mercury sampling bottle body cannot be inclined, the bottle mouth of the short tube self-circulation type mercury sampling bottle body is fixed with a rubber band for a quartz glass plug, gas. The waste gas is guided through the gas guide pipe and then downwards collides with absorption liquid at the bottom of the short pipe self-circulation type mercury sampling bottle body to form countless extremely fine bubbles, the bubbles formed by full contact and turnover of the waste gas and the absorption liquid rise along a liquid column of the short pipe self-circulation type mercury sampling bottle body, the bubbles are broken near a scale liquid level, as a gas-liquid mixture of the short pipe self-circulation type mercury sampling bottle body and the absorption liquid in the spherical condensation descending circulation pipe have density difference, the static pressure difference between the gas-liquid mixture and the absorption liquid drives the absorption liquid in the spherical condensation descending circulation pipe to flow back into the short pipe self-circulation type mercury sampling bottle body, the absorption liquid continuously contacts with the waste gas in natural circulation to keep low temperature and prolong the retention time of gaseous element mercury in the absorption liquid, the absorption liquid and the gaseous element mercury fully react and absorb, and the.
Compared with the prior art, the invention at least has the following advantages: according to the natural circulation working principle, the circulation loop is designed in the absorption bottle, so that the absorption liquid naturally and circularly flows in the circulation loop in the absorption bottle, bubbles naturally and circularly flow along with the absorption liquid until the bubbles grow into larger bubbles and then are broken on the liquid level, and meanwhile, a condensing device is additionally arranged outside the descending pipe, so that the time for the absorption liquid to fully contact with the granular mercury and the gaseous mercury and perform mass transfer reaction is prolonged while the absorption liquid is cooled, and the retention time of the mercury in the absorption liquid can be prolonged even if the consumption of the absorption liquid is not increased.
Drawings
FIG. 1 is a schematic structural diagram of a self-circulation mercury sampling bottle with a short pipe for fixing pollution source waste gas according to the present invention.
FIG. 2 is a schematic diagram of a large sample A of the self-circulation mercury sampling bottle with the fixed pollution source waste gas short pipe.
1-gas delivery pipe 2-gas inlet pipe 3-short pipe self-circulation type mercury sampling bottle body
4-connecting a draft tube 5-a spherical condensation descending circulating tube.
Detailed Description
The invention is further described with reference to the following detailed description of embodiments and drawings.
As shown in fig. 1 and 2, the self-circulation mercury sampling bottle with the fixed pollution source waste gas short pipe is characterized in that: the gas sampling device comprises a gas outlet pipe 1, a gas inlet pipe 2, a short pipe self-circulation mercury sampling bottle body 3, a connecting through-flow pipe 4 and a spherical condensation descending circulation pipe 5, wherein the short pipe self-circulation mercury sampling bottle body 3 is designed to be thick at the upper part and thin at the lower part, the absorption liquid column can be heightened by the thin and thin lower part of the short pipe self-circulation mercury sampling bottle body 3, the detected gas can be fully contacted with the absorption liquid, bubbles which are overturned can be rapidly broken by the expansion of the upper part of the short pipe self-circulation mercury sampling bottle body 3, ice water with the temperature of 0-4 ℃ continuously flows through the outer sleeve of the spherical condensation descending circulation pipe 5, the gas outlet pipe 1 and the gas inlet pipe 2 penetrate through a quartz glass plug, the quartz glass plug is matched with the short pipe self-circulation mercury sampling bottle body 3 in a frosted mode, the upper end of the spherical condensation descending circulation pipe 5 is connected with the upper part of the short pipe self-circulation mercury sampling bottle .
The short tube self-circulation type mercury sampling bottle body 3, the connecting draft tube 4 and the spherical condensation descending circulation tube 5 form a natural circulation loop, the gas inlet tube 2 is directly inserted into the bottom of the short tube self-circulation type mercury sampling bottle body 3, the bottom end of the gas inlet tube 2 is welded with a porous screen plate, the opening area of the porous screen plate is equivalent to the section area of the gas inlet tube 2, and gas flow is ejected out in the form of uniform ultrafine bubbles after impacting the porous screen plate.
Variations and modifications to the above-described embodiments may occur to those skilled in the art, which fall within the scope and spirit of the above description. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (3)
1. Fixed pollution sources waste gas nozzle stub self-loopa formula mercury sampling bottle, characterized by: the device comprises a gas outlet pipe, a gas inlet pipe, a short pipe self-circulation type mercury sampling bottle body, a connecting through-flow pipe and a spherical condensation descending circulation pipe, wherein ice water with the temperature of 0-4 ℃ continuously flows through an outer sleeve of the spherical condensation descending circulation pipe; the gas inlet pipe is directly inserted into the bottom of the short self-circulation mercury sampling bottle body, the bottom end of the gas inlet pipe is welded with a porous screen plate, the opening area of the porous screen plate is equivalent to the section area of the gas inlet pipe, and gas flow is sprayed out by uniform ultrafine bubbles after impacting the porous screen plate.
2. The fixed pollution source exhaust gas short pipe self-circulation type mercury sampling bottle as claimed in claim 1, wherein: the design of the short tube self-circulation mercury sampling bottle body is that the upper part is thick, the lower part is thin and long, the lower part of the short tube self-circulation mercury sampling bottle body is thin and long, so that an absorption liquid column can be increased, the detected gas can be fully contacted with the absorption liquid, and the expansion of the upper part of the short tube self-circulation mercury sampling bottle body can rapidly destroy the overturned bubbles.
3. The fixed pollution source exhaust gas short pipe self-circulation type mercury sampling bottle as claimed in claim 1, wherein: the short pipe self-circulation type mercury sampling bottle body, the connecting draft tube and the spherical condensation descending circulating pipe form a natural circulation loop.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110020941.1A CN112697540A (en) | 2021-01-08 | 2021-01-08 | Short pipe self-circulating mercury sampling bottle for fixed pollution source waste gas |
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| CN202110020941.1A CN112697540A (en) | 2021-01-08 | 2021-01-08 | Short pipe self-circulating mercury sampling bottle for fixed pollution source waste gas |
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| CN112697540A true CN112697540A (en) | 2021-04-23 |
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| CN202110020941.1A Pending CN112697540A (en) | 2021-01-08 | 2021-01-08 | Short pipe self-circulating mercury sampling bottle for fixed pollution source waste gas |
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| US5814743A (en) * | 1996-04-22 | 1998-09-29 | Compagnie Generale Des Matieres Nucleaires | Device for taking samples of noxious liquids, particularly liquids charged with solid particles |
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| CN202447098U (en) * | 2011-12-21 | 2012-09-26 | 神华集团有限责任公司 | Catalyst oil removing device |
| CN103274549A (en) * | 2013-06-07 | 2013-09-04 | 中国农业大学 | Cycle closed type filler-free high-efficiency ammonia nitrogen removing and nutrient recovery device of biogas slurry |
| CN104211177A (en) * | 2014-09-19 | 2014-12-17 | 浙江大学 | Gas oscillation type self-circulation denitrification reactor |
| CN104857832A (en) * | 2015-06-05 | 2015-08-26 | 山东钢铁股份有限公司 | Absorption device of hydrogen sulfide gas |
| CN208383518U (en) * | 2018-07-09 | 2019-01-15 | 杜娟 | A kind of heavy duty detergent bubble absorption tube with porous plate |
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2021
- 2021-01-08 CN CN202110020941.1A patent/CN112697540A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5814743A (en) * | 1996-04-22 | 1998-09-29 | Compagnie Generale Des Matieres Nucleaires | Device for taking samples of noxious liquids, particularly liquids charged with solid particles |
| CN101041513A (en) * | 2007-01-22 | 2007-09-26 | 浙江大学 | Gas-lifting type self-circulating anaerobic bioreactor |
| CN101423293A (en) * | 2008-11-07 | 2009-05-06 | 浙江大学 | Two-channel self circulation anaerobic bioreactor |
| CN202447098U (en) * | 2011-12-21 | 2012-09-26 | 神华集团有限责任公司 | Catalyst oil removing device |
| CN103274549A (en) * | 2013-06-07 | 2013-09-04 | 中国农业大学 | Cycle closed type filler-free high-efficiency ammonia nitrogen removing and nutrient recovery device of biogas slurry |
| CN104211177A (en) * | 2014-09-19 | 2014-12-17 | 浙江大学 | Gas oscillation type self-circulation denitrification reactor |
| CN104857832A (en) * | 2015-06-05 | 2015-08-26 | 山东钢铁股份有限公司 | Absorption device of hydrogen sulfide gas |
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