CN112723321A - Acid cross-linking system and acid cross-linking process for industrial sulfuric acid preparation purification section - Google Patents
Acid cross-linking system and acid cross-linking process for industrial sulfuric acid preparation purification section Download PDFInfo
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- CN112723321A CN112723321A CN202110103493.1A CN202110103493A CN112723321A CN 112723321 A CN112723321 A CN 112723321A CN 202110103493 A CN202110103493 A CN 202110103493A CN 112723321 A CN112723321 A CN 112723321A
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- 239000002253 acid Substances 0.000 title claims abstract description 151
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000000746 purification Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 31
- 230000008569 process Effects 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000004132 cross linking Methods 0.000 title claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 62
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 56
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000004064 recycling Methods 0.000 claims abstract description 35
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 29
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005406 washing Methods 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000010306 acid treatment Methods 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 235000011149 sulphuric acid Nutrition 0.000 claims description 2
- 239000001117 sulphuric acid Substances 0.000 claims description 2
- 238000009776 industrial production Methods 0.000 claims 4
- 239000007789 gas Substances 0.000 abstract description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 10
- 239000003546 flue gas Substances 0.000 abstract description 10
- 239000000428 dust Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000003723 Smelting Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000010865 sewage Substances 0.000 abstract description 3
- -1 and the cooling Substances 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 12
- 238000002156 mixing Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000003599 detergent Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 230000001502 supplementing effect Effects 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
- C01B17/906—Removal of mercury
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/90—Separation; Purification
- C01B17/907—Removal of arsenic
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a cross-acid system and a cross-acid process for a purification section for industrially preparing sulfuric acid, belongs to the technical field of sulfuric acid purification, and particularly discloses the following cross-acid system: comprises a gas cooling tower, a cooling mercury removal tower, a secondary scrubber, a primary scrubber, a settling tank, a dilute acid tank and a dilute acid recycling device which are sequentially connected in series. Simultaneously discloses the following acid cross-linking process: the circulating acid liquid is sequentially mixed with acid through a gas cooling tower and a cooling mercury removal tower, then sequentially enters a secondary washer and a primary washer for washing, then enters a settling tank for settling, then enters a dilute acid tank, and finally enters a dilute acid recycling device; and the circulating acid liquor enters a secondary washer for circulation through a dilute acid recycling device to finish the acid cross-linking process of the industrial sulfuric acid preparation purification section. The invention is applied to the acid making purification section to wash the smelting flue gas, and the cooling, dust removal, arsenic removal and mercury removal effects can meet the purification index requirements. The method has the advantages of reliable flow technology, strong adaptability, simple operation, low operation cost and little sewage discharge.
Description
Technical Field
The invention relates to the technical field of sulfuric acid purification, in particular to a cross-acid system and a cross-acid process for an industrial sulfuric acid preparation purification section.
Background
At present, most of sulfuric acid flue gas purification processes operated in the acid making industry are dilute acid pickling processes. The pickling process has the advantages of reliable technology, strong adaptability, simple operation, low operation cost and little sewage discharge; the dust removal, arsenic removal and mercury removal effects can meet the requirement of purification indexes. The dilute acid washing and purifying process of the first-stage washer, the gas cooling tower, the second-stage washer and the two-stage electric demister is widely applied to the preparation of acid from nonferrous smelting flue gas, especially the working conditions of large flue gas amount and large fluctuation.
Therefore, how to provide a cross-acid system and a cross-acid process for enabling flue gas entering a drying tower to be cleaner in a purification section for preparing sulfuric acid industrially, which leads technical problems to be urgently needed to be solved by technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a cross-acid system and a cross-acid process for a purification section for industrially preparing sulfuric acid, which can effectively reduce the content of arsenic and mercury elements in a circulating liquid.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a sour system of cluster of industry preparation sulphuric acid purification workshop section which characterized in that, includes gas cooling tower, cooling demercuration tower, second grade scrubber, first order scrubber, settling tank, dilute acid groove and dilute acid retrieval and utilization device that establish ties in proper order.
Has the advantages that: the invention uses a dilute acid recycling device with the least arsenic and mercury elements in circulating acid liquid and a gas cooling tower as the starting point of acid string, the acid string sequence is that the dilute acid recycling device enters a secondary efficient washer in the acid string sequence, the gas cooling tower enters a cooling mercury removal tower in the acid string sequence, and the gas cooling tower enters the secondary efficient washer, a primary efficient washer, a conical settling tank and a dilute acid tank in the cooling mercury removal tower in sequence, and finally enters the dilute acid recycling device, thus forming a new acid string mode.
Preferably, the dilute acid recycling device is communicated with a secondary washer, so that the secondary washer, the primary washer, the settling tank, the dilute acid tank and the dilute acid recycling device form a loop; the dilute acid recycling device is simultaneously communicated with an external waste acid treatment system.
Preferably, the primary scrubber is a primary high-efficiency scrubber, and the secondary scrubber is a secondary high-efficiency scrubber.
Preferably, the settling tank is a conical settling tank.
Has the advantages that: the dilute acid recycling device treats arsenic elements in the dilute acid by adding a heavy metal catching agent, and the cooling mercury removal tower treats mercury elements in the dilute acid at low temperature by a cold water unit and a plate heat exchanger.
The closed loop of the purification section formed in the invention can maximally circulate the solution in the purification section, improve the utilization rate of the added medicament in the purification section and reduce the content of heavy metals, such as arsenic, in the system. The closed loop can also prevent each tower tank from becoming a dead water area for impurity deposition, thereby improving the washing effect and further removing dust and impurities.
Meanwhile, by utilizing the characteristics of the gas cooling tower in the purification section, namely, a large amount of water in clean flue gas is condensed in the gas cooling tower, and the solution in the gas cooling tower is taken as a starting point, acid is mixed and the solution in the mercury removing tower is continuously replaced and cooled, so that the content of mercury impurities in the solution in the mercury removing tower is further reduced, and the aim of purifying the flue gas is fulfilled.
Preferably, the method further comprises the following steps: and the electric demister is communicated with the water inlet end of the primary washer.
Has the advantages that: the new water of the electric demister is electric demister washing water for washing the attached impurities on the inner wall of the electric demister, the impurities are mostly smoke dust and mine dust, and the electric demister washing water is transferred to a conical sedimentation tank after entering a primary washer for carrying out impurity recovery treatment.
The acid cross-linking process for the industrial preparation of the sulfuric acid purification section is characterized by being completed in the acid cross-linking system for the industrial preparation of the sulfuric acid purification section, and specifically comprises the following steps:
the circulating acid liquid is sequentially mixed with acid through a gas cooling tower and a cooling mercury removal tower, then sequentially enters a secondary washer and a primary washer for washing, then enters a settling tank for settling, then enters a dilute acid tank, and finally enters a dilute acid recycling device; and the circulating acid liquor enters a secondary washer for circulation through a dilute acid recycling device to finish the acid cross-linking process of the industrial sulfuric acid preparation purification section.
The first-stage washer is a first-stage high-efficiency washer, and the second-stage washer is a second-stage high-efficiency washer.
Preferably, the acid liquor in the dilute acid recycling device also enters the waste acid treatment system to maintain the solution balance of the purification section.
Preferably, the system further comprises a pre-production additive liquid, wherein the pre-production additive liquid is water and is introduced into the cooling mercury removal tower.
Has the advantages that: and introducing water into the cooling mercury removal tower, wherein the system supplementing water is added before the cooling mercury removal tower is in test operation, and is used for establishing the circulating balance of the system solution in the purification section, and the system supplementing water is not added after normal production.
Preferably, the secondary scrubber is washed by passing water through the secondary scrubber.
Has the advantages that: and introducing water into the secondary washer, wherein the water is system supplementing water added before the secondary washer is in test operation, and is used for establishing the solution circulation balance of the purification section system, and the water is not added after normal production.
Preferably, water is introduced into the electric demister.
Has the advantages that: the new water of the electric demister is electric demister washing water for washing the attached impurities on the inner wall of the electric demister, the impurities are mostly smoke dust and mine dust, and the electric demister washing water is transferred to a conical sedimentation tank after entering a primary washer for carrying out impurity recovery treatment. After normal production, the electric demister equipment body requires 1-3 days of washing once.
In addition, the purification section of the invention belongs to semi-adiabatic temperature reduction, the loss water amount of the first-stage efficient scrubber is the largest, and the collection water amount of the gas cooling tower is the largest, so that the gas cooling tower does not need to add new water to maintain the liquid level.
Preferably, in the acid mixing process, the liquid level of the settling tank is full of the tank and overflows to the dilute acid tank; the liquid levels of the first-stage scrubber, the second-stage scrubber, the gas cooling tower, the cooling mercury removal tower and the dilute acid tank are 40-80%.
Has the advantages that: the liquid level of each tower groove is controlled to be 40-80%, and the liquid level of each tower is balanced by adjusting the acid mixing amount through the acid mixing valve.
Preferably, the content of arsenic and mercury in the circulating acid liquor taken from each tower tank is analyzed every month.
Compared with the prior art, the technical scheme has the advantages that the acid crossing system and the acid crossing process for the industrial sulfuric acid preparation purification section have the following advantages:
1. according to the invention, the acid mixing is carried out from less to more according to the content of the arsenic and mercury elements in the circulating acid liquid in each tower tank of the purification section, which is beneficial to reducing the content of the arsenic and mercury elements in the circulating liquid;
2. the invention is applied to the acid-making purification section to wash the smelting flue gas, and the cooling, dust removal, arsenic removal and mercury removal effects can meet the purification index requirements;
3. the method has the advantages of reliable flow technology, strong adaptability, simple operation, low operation cost and little sewage discharge; the device is particularly suitable for the working conditions of large smoke amount and large fluctuation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view showing a process flow in example 1 of the present invention;
FIG. 2 is a schematic diagram showing the process of comparative example 1 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
A series acid system of a purification section for industrially preparing sulfuric acid is shown in figure 1 and comprises a gas cooling tower, a cooling mercury removal tower, a secondary efficient washer, a primary efficient washer, a conical settling tank, a dilute acid recycling device and a waste acid treatment system which are sequentially connected in series.
In order to further optimize the technical scheme, the dilute acid recycling device is communicated with the secondary efficient washer, so that the secondary efficient washer, the primary efficient washer, the conical settling tank, the dilute acid tank and the dilute acid recycling device form a closed loop.
Furthermore, the device also comprises an electric demister, and the electric demister is connected with the water inlet end of the first-stage efficient washer.
The acid cross-linking process for the industrial preparation of the sulfuric acid purification section is completed in the system for the industrial preparation of the acid cross-linking of the sulfuric acid purification section, and specifically comprises the following steps:
and introducing fresh water into the cooling mercury removal tower, the electric demister and the secondary efficient detergent, wherein the fresh water in the electric demister enters the primary efficient detergent after washing impurities on the inner wall of the electric demister, the circulating acid liquor is further washed, and the added system supplementing water before the secondary detergent is in trial operation is used for establishing the circulating balance of the system solution in the purification working section and is not added after normal production. Sulfuric acid is subjected to acid mixing in a gas cooling tower, enters a cooling mercury removal tower to remove mercury elements, then sequentially enters a secondary efficient washer and a primary efficient washer after being cooled to remove mercury, enters a conical settling tank for settling, enters a dilute acid tank, and finally enters a dilute acid recycling device, one part of acid liquor in the dilute acid recycling device enters the secondary washer, then enters a loop formed by the secondary washer, the primary washer, the settling tank, the dilute acid tank and the dilute acid recycling device for secondary purification, and the other part of acid liquor enters a waste acid treatment system for treatment.
Comparative example
A serial acid system of a purification section for industrially preparing sulfuric acid is shown in figure 2, and comprises a cooling mercury-removing tower, a secondary efficient scrubber, a gas cooling tower, a primary efficient scrubber, a conical settling tank, a dilute acid tank and a dilute acid recycling device which are sequentially connected in series, wherein the dilute acid recycling device comprises a first liquid outlet and a second liquid outlet, the first liquid outlet is communicated with the secondary efficient scrubber, and the second liquid outlet is communicated with an external waste acid treatment system;
the acid cross-linking process for the industrial preparation of the sulfuric acid purification section is used for treating circulating acid liquid by using the acid cross-linking system for the industrial preparation of the sulfuric acid purification section, and specifically comprises the following steps:
introducing fresh water into the cooling mercury removal tower, the electric demister and the second-stage efficient detergent, leading sulfuric acid to enter the cooling mercury removal tower to remove mercury elements after acid mixing in the gas cooling tower, then sequentially entering the second-stage efficient scrubber, the gas cooling tower, the first-stage efficient scrubber, the conical settling tank, the dilute acid tank and the dilute acid recycling device, leading one part of acid liquid in the dilute acid recycling device to enter the cooling mercury removal tower through the first liquid outlet for purification again, and leading the other part of acid liquid to enter the external waste acid treatment system through the second liquid outlet for treatment. Meanwhile, the dilute acid recycling device and the cooling mercury removal tower are directly connected with an electric demister through a tee joint, and water after demisting through the electric demister and acid liquor in the dilute acid recycling device enter the cooling mercury removal tower together.
In the acid string system of comparative example 1, the gas cooling tower and the dilute acid recycling device have the least arsenic and mercury harmful ions in the circulating acid solution, and the first-stage high-efficiency scrubber and the second-stage high-efficiency scrubber have more arsenic and mercury harmful ions in the circulating acid solution. According to the circulating acid liquid after the flue gas is purified and washed theoretically, the sequence of arsenic and mercury elements of the circulating acid liquid of each tower from small to large is as follows: a cooling mercury-removing tower, a dilute acid recycling device, a secondary efficient scrubber, a gas cooling tower, a primary efficient scrubber and a dilute acid tank. Therefore, the harmful arsenic and mercury elements, of each tower circulating acid liquid in the comparative example 1 violate the values of normal theoretical requirements, and the fact that the acid crossing mode is not beneficial to reducing the content of the arsenic and mercury elements in the circulating liquid is shown.
The technical effects are as follows:
in the production process, the circulating liquid of each tower in the purification section is sampled for several times, and the turbidity of the solution of the secondary efficient scrubber and the cooling mercury removal tower is slightly higher than that of the gas cooling tower, wherein the arsenic element liquid and the mercury element liquid are higher than that of the gas cooling tower. In the examples, the arsenic and mercury element analysis of the solution in each tower circulating tank of the purification system of the purification section for industrially preparing sulfuric acid is shown in table 1:
TABLE 1 analysis table for arsenic and mercury in solution in circulation tank of each purification tower
| As (%) | Hg (%) | |
| First-stage efficient scrubber | 0.0071 | 0.0024 |
| Gas cooling tower | 0.0004 | 0.0002 |
| Two-stage high-efficiency washer | 0.0007 | 0.0001 |
| Cooling mercury removal tower | 0.0002 | 0.0001 |
| Dilute acid tank | 0.0038 | 0.0018 |
| Dilute acid recycling device | 0.0003 | 0.0002 |
It can be seen from the above table that after the purifying circulating acid solution in the invention adopts the novel cross-acid mode, the arsenic and mercury elements in the circulating liquid in each tower tank are close to the ideal state from the arsenic and mercury element analysis table of the circulating tank solution in each tower, especially the content of the arsenic and mercury elements in the circulating acid solution in the cooling mercury removal tower at the last of the purifying section is basically 0, the novel cross-acid mode has reached the expected effect, and the arsenic and mercury elements in the circulating acid solution in the cooling mercury removal tower are close to 0.
In the comparative example, the arsenic and mercury element analysis of the cleaning solution in each tower circulating tank of the acid crossing system of the industrial sulfuric acid preparation cleaning section is shown in Table 2:
table 2:
as can be seen from the analysis elements of the tower circulation tanks in the table above, the arsenic and mercury harmful ions in the gas cooling tower and the diluted acid recycling device are the least, and the arsenic and mercury harmful ions in the first-stage efficient scrubber and the second-stage efficient scrubber are more in the circulating acid liquor. According to the circulating acid liquid after the flue gas is purified and washed theoretically, the sequence of arsenic and mercury elements of the circulating acid liquid of each tower from small to large is as follows: a cooling mercury-removing tower, a dilute acid recycling device, a secondary efficient scrubber, a gas cooling tower, a primary efficient scrubber and a dilute acid tank. It is clear that the harmful arsenic and mercury elements arsenic and mercury in the circulating acid solution of each column in table 2 violate the values required by normal theory.
In conclusion, the invention breaks through the original bottleneck through the transformation of the acid cross-linking process, so that the solution in the cooling mercury removal tower forms a dynamic acid cross-linking replacement mode, and a dead water area with impurity deposition is avoided, thereby achieving the purpose of reducing the impurity content of the solution.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a sour system of cluster of industry preparation sulphuric acid purification workshop section which characterized in that, includes gas cooling tower, cooling demercuration tower, second grade scrubber, first order scrubber, settling tank, dilute acid groove and dilute acid retrieval and utilization device that establish ties in proper order.
2. The acid crossing system for the purification section of industrial production of sulfuric acid according to claim 1, wherein the dilute acid recycling device is communicated with a secondary scrubber to form a loop; the dilute acid recycling device is communicated with an external waste acid treatment system.
3. The acid crossing system for the industrial sulfuric acid production purification section according to claim 2, further comprising: and the electric demister is communicated with the water inlet end of the primary washer.
4. The cross-acid process of the cross-acid system of the industrial sulfuric acid preparation purification section according to any one of claims 1 to 3, which comprises the following steps:
the circulating acid liquid is sequentially mixed with acid through a gas cooling tower and a cooling mercury removal tower, then sequentially enters a secondary washer and a primary washer for washing, then enters a settling tank for settling, then enters a dilute acid tank, and finally enters a dilute acid recycling device; and the circulating acid liquor enters a secondary washer for circulation through a dilute acid recycling device to finish the acid cross-linking process of the industrial sulfuric acid preparation purification section.
5. The acid crossing process for the industrial production of sulfuric acid purification section according to claim 4, wherein the circulating acid liquor in the dilute acid recycling device also enters the waste acid treatment system.
6. The acid crossing process for the industrial production of the sulfuric acid purification section as claimed in claim 5, further comprising a pre-production additive solution, wherein the pre-production additive solution is water and is introduced into the cooling mercury removal tower.
7. The acid crossing process for the industrial production of the sulfuric acid purification section, according to claim 6, is characterized in that the liquid level of the settling tank is full of the tank and overflows to the dilute acid tank; the liquid levels of the first-stage scrubber, the second-stage scrubber, the gas cooling tower, the cooling mercury removal tower and the dilute acid tank are 40-80%.
8. The process of claim 7, wherein the content of arsenic and mercury in the recycled acid solution from each column is analyzed every month.
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|---|---|---|---|---|
| AR043268A1 (en) * | 1997-06-11 | 2005-07-27 | Searle & Co | PROCESS FOR THE PREPARATION OF AN INTERMEDIARY COMPOUND IN THE SYNTHESIS OF A STEROID DERIVATIVE 9, 11-EPOXI; FROM A DERIVATIVE OF MEXRENONA; OF A DELTA-4,5, STEROID REPLACED WITH 3-CETO-7 ALFA ALCOXICARBONILO AND OTHER INTERMEDIARY COMPOUNDS AND COMPOSITE SUBSTRATES OBTAINED |
| CN202590565U (en) * | 2012-05-10 | 2012-12-12 | 阳谷祥光铜业有限公司 | Purifying equipment for acid making with flue gas |
| CN204093234U (en) * | 2014-10-27 | 2015-01-14 | 瓮福（集团）有限责任公司 | A kind of sulfuric acid flue gas cleaning process unit |
| CN105385850A (en) * | 2015-11-02 | 2016-03-09 | 上海交通大学 | Method for separating and recycling heavy metal in mercury, selenium and arsenic containing dirt acid sludge |
| CN106000029A (en) * | 2016-04-18 | 2016-10-12 | 江苏大学 | Method and device for simultaneously desulfurizing, denitrifying and removing mercury by light excitation electrolysis |
| CN110280095A (en) * | 2019-07-16 | 2019-09-27 | 长沙有色冶金设计研究院有限公司 | A kind of method for removing hydrargyrum of flue gas during smelting |
| CN111154982A (en) * | 2020-02-20 | 2020-05-15 | 呼伦贝尔驰宏矿业有限公司 | System and process for classifying and recovering valuable metals in waste acid |
-
2021
- 2021-01-26 CN CN202110103493.1A patent/CN112723321A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AR043268A1 (en) * | 1997-06-11 | 2005-07-27 | Searle & Co | PROCESS FOR THE PREPARATION OF AN INTERMEDIARY COMPOUND IN THE SYNTHESIS OF A STEROID DERIVATIVE 9, 11-EPOXI; FROM A DERIVATIVE OF MEXRENONA; OF A DELTA-4,5, STEROID REPLACED WITH 3-CETO-7 ALFA ALCOXICARBONILO AND OTHER INTERMEDIARY COMPOUNDS AND COMPOSITE SUBSTRATES OBTAINED |
| CN202590565U (en) * | 2012-05-10 | 2012-12-12 | 阳谷祥光铜业有限公司 | Purifying equipment for acid making with flue gas |
| CN204093234U (en) * | 2014-10-27 | 2015-01-14 | 瓮福（集团）有限责任公司 | A kind of sulfuric acid flue gas cleaning process unit |
| CN105385850A (en) * | 2015-11-02 | 2016-03-09 | 上海交通大学 | Method for separating and recycling heavy metal in mercury, selenium and arsenic containing dirt acid sludge |
| CN106000029A (en) * | 2016-04-18 | 2016-10-12 | 江苏大学 | Method and device for simultaneously desulfurizing, denitrifying and removing mercury by light excitation electrolysis |
| CN110280095A (en) * | 2019-07-16 | 2019-09-27 | 长沙有色冶金设计研究院有限公司 | A kind of method for removing hydrargyrum of flue gas during smelting |
| CN111154982A (en) * | 2020-02-20 | 2020-05-15 | 呼伦贝尔驰宏矿业有限公司 | System and process for classifying and recovering valuable metals in waste acid |
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Application publication date: 20210430 |