CN113814252A - Solid hazardous waste slurry preparation system and preparation method thereof - Google Patents
Solid hazardous waste slurry preparation system and preparation method thereof Download PDFInfo
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- CN113814252A CN113814252A CN202010561421.7A CN202010561421A CN113814252A CN 113814252 A CN113814252 A CN 113814252A CN 202010561421 A CN202010561421 A CN 202010561421A CN 113814252 A CN113814252 A CN 113814252A
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- hazardous waste
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- 239000007787 solid Substances 0.000 title claims abstract description 124
- 239000002002 slurry Substances 0.000 title claims abstract description 91
- 239000002920 hazardous waste Substances 0.000 title claims abstract description 87
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- 239000004094 surface-active agent Substances 0.000 claims abstract description 53
- 239000007788 liquid Substances 0.000 claims abstract description 46
- 239000013056 hazardous product Substances 0.000 claims abstract description 33
- 238000000227 grinding Methods 0.000 claims abstract description 19
- 239000000203 mixture Substances 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 238000003860 storage Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 239000010802 sludge Substances 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 238000007670 refining Methods 0.000 claims description 8
- 239000003945 anionic surfactant Substances 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 239000003093 cationic surfactant Substances 0.000 claims description 3
- 239000002736 nonionic surfactant Substances 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 239000002888 zwitterionic surfactant Substances 0.000 claims description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 21
- 239000000383 hazardous chemical Substances 0.000 description 10
- GCNLRNBDDUYJMP-UHFFFAOYSA-M sodium;2-methylnaphthalene-1-sulfonate Chemical compound [Na+].C1=CC=CC2=C(S([O-])(=O)=O)C(C)=CC=C21 GCNLRNBDDUYJMP-UHFFFAOYSA-M 0.000 description 7
- 239000002699 waste material Substances 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 4
- 239000001768 carboxy methyl cellulose Substances 0.000 description 4
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 4
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- NPKGQBIUYHHPOT-UHFFFAOYSA-N [Cu+2].[C-]#[C-] Chemical compound [Cu+2].[C-]#[C-] NPKGQBIUYHHPOT-UHFFFAOYSA-N 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to the technical field of harmless treatment of hazardous wastes, and discloses a solid hazardous waste slurry preparation system and a preparation method thereof, wherein the preparation method comprises the following steps: step 100: continuously grinding the solid hazardous waste into powder; step 200: mixing the powder of step 100 with a surfactant to form a primary mixture; step 300: mixing the primary mixture with a liquid to form a secondary mixture; step 400: continuously grinding the secondary mixture to form a solid hazardous material slurry; step 500: storing the solid hazardous material slurry for later use. According to the invention, the solid hazardous waste is prepared into slurry for harmless treatment in the entrained flow incinerator at the later stage, so that the harmless treatment efficiency of the solid hazardous waste is obviously improved.
Description
Technical Field
The invention relates to the technical field of harmless treatment of hazardous wastes, in particular to a solid hazardous waste slurry preparation system and a preparation method thereof.
Background
Hazardous waste is easy to pollute the environment due to harmful substances in the hazardous waste, the disposal of the hazardous waste becomes a hot topic all over the world, and serious environmental and ecological problems can be caused if the hazardous waste is improperly disposed. Meanwhile, most dangerous wastes contain noble metal elements, so that the method has a high recovery value. Therefore, the method has remarkable economic and social significance for correctly treating the solid hazardous waste and recovering the metal elements in the solid hazardous waste.
At present, solid hazardous wastes are mainly subjected to harmless treatment through a rotary kiln, and the furnace type mainly adopts a belt feeding or elevator feeding mode and does not relate to a slurry preparation process. The feeding system has poor sealing performance and the problem of pollutant escape. Meanwhile, the feeding mode is greatly influenced by human factors, has the characteristic of uneven feeding, and is very easy to cause safety accidents when excessive materials with the burning and explosion characteristics are added.
Disclosure of Invention
The invention aims to overcome the problems in rotary kiln treatment in the prior art, and provides a solid hazardous waste slurry preparation system and a preparation method thereof.
In order to accomplish the above objects, according to one aspect of the present invention, there is provided a solid hazardous waste slurry preparation system comprising a grinder, which is provided with a solid hazardous material feed port, a surfactant feed port, and a liquid feed port, and a slurry storage tank connected to the grinder; and inputting solid hazardous materials, surfactant and liquid into the grinding machine through the solid hazardous material inlet, the surfactant inlet and the liquid inlet respectively to be ground and form solid hazardous material slurry, and inputting the solid hazardous material slurry into the slurry storage tank.
Preferably, the solid hazardous substance feeding port is connected with a weighing feeder, and the solid hazardous substance is weighed by the weighing feeder and then input into the grinding machine from the solid hazardous substance feeding port.
Preferably, be equipped with the agitator on the slurry storage tank, the agitator includes actuating mechanism, puddler and sets up the stirring rake of puddler tip, the stirring rake stretches into the inside of slurry storage tank.
Preferably, the surfactant feed port is connected with a surfactant pipeline, and the surfactant pipeline is respectively provided with a first flow meter for measuring the addition amount of the surfactant and a first flow regulating valve for controlling the addition flow of the surfactant.
Preferably, the liquid feed port is connected with a liquid pipeline, and a second flowmeter for measuring the liquid addition amount and a second flow regulating valve for controlling the liquid addition flow are respectively arranged on the liquid pipeline.
In a second aspect, the present invention provides a method for preparing a solid hazardous waste slurry, comprising the steps of:
step 100: continuously grinding the solid hazardous waste into powder;
step 200: mixing the powder of step 100 with a surfactant to form a primary mixture;
step 300: mixing the primary mixture with a liquid to form a secondary mixture;
step 400: continuously grinding the secondary mixture to form a solid hazardous material slurry;
step 500: storing the solid hazardous material slurry for later use.
Preferably, the solid hazardous waste of step 100 is metered and weighed prior to grinding.
Preferably, the amount of the solid hazardous waste continuously ground in the step 100 is 0.1 to 100 tons/hour.
Preferably, the surfactant in the step 200 comprises: at least one of a cationic surfactant, an anionic surfactant, a zwitterionic surfactant, and a nonionic surfactant.
Preferably, the amount of the surfactant added in the step 200 is 0.01% -10% of the mass of the solid hazardous waste.
Preferably, the liquid in step 300 comprises: organic wastewater discharged by the oil refining chemical device, oily sludge in the oil refining chemical sewage treatment device, and oily sludge generated by oil exploitation.
Preferably, the solid hazardous waste slurry formed in step 400 has a solid hazardous waste content of 1% to 90% by mass.
Preferably, the solid hazardous material slurry in step 400 is kept under constant agitation.
Through the technical scheme, the solid hazardous waste slurry preparation system provided by the invention has the advantages that the solid hazardous waste is prepared into slurry and is sent into the entrained flow incinerator for harmless treatment in the later period, so that the efficiency of harmless treatment of the solid hazardous waste is obviously improved.
Drawings
Fig. 1 is a schematic structural diagram of a solid hazardous waste slurry preparation system in one embodiment of the invention.
Description of the reference numerals
100. A grinder; 200. a slurry storage tank; 300. a weighing feeder; 400. solid hazardous materials; 500. a stirrer; 510. a drive mechanism; 520. a stirring rod; 521. a stirring paddle; 600. a surfactant line; 610. a first flow meter; 620. a first flow regulating valve; 700. a liquid line; 710. a second flow meter; 720. a second flow regulating valve.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right as viewed with reference to the accompanying drawings, unless otherwise specified; "inner and outer" generally refer to the inner and outer relative to the profile of the components themselves; "distal and proximal" generally refer to distance relative to the contour of the components themselves.
As shown in fig. 1, an aspect of the present invention provides a solid hazardous waste slurry preparation system, comprising a grinder 100 and a slurry storage tank 200 connected to the grinder 100, the grinder 100 being provided with a solid hazardous material feed port, a surfactant feed port and a liquid feed port; the solid hazardous material, the surfactant and the liquid are input into the grinder 100 through the solid hazardous material inlet, the surfactant inlet and the liquid inlet, respectively, to be ground and to form a solid hazardous material slurry, which is input into the slurry storage tank 200. As can be seen from the above, the solid hazardous waste slurry preparation system provided by the invention remarkably improves the efficiency of harmless treatment of the solid hazardous waste by making the solid hazardous waste into slurry for feeding into the entrained flow incinerator for harmless treatment at a later stage.
Specifically, the solid hazardous material inlet is connected to the gravimetric feeder 300, and the solid hazardous material 400 is weighed by the gravimetric feeder 300 and then input into the grinding machine 100 through the solid hazardous material inlet.
In order to effectively prevent the solid hazardous material slurry from depositing, the slurry storage tank 200 is provided with a stirrer 500 for continuously stirring the solid hazardous material, the surfactant and the liquid, the stirrer 500 comprises a driving mechanism 510, a stirring rod 520 and a stirring paddle 521 arranged at the end of the stirring rod 520, and the stirring paddle 521 extends into the slurry storage tank 200.
In order to facilitate feeding, the surfactant feed port is connected to a surfactant pipeline 600, and the surfactant pipeline 600 is provided with a first flow meter 610 for measuring the addition amount of the surfactant and a first flow regulating valve 620 for controlling the addition flow of the surfactant respectively. Meanwhile, the liquid feed port is connected to a liquid line 700, and a second flow meter 710 for measuring the amount of the added liquid and a second flow regulating valve 720 for controlling the amount of the added liquid are respectively disposed on the liquid line 700.
In a second aspect, the present invention provides a method for preparing a solid hazardous waste slurry, comprising the steps of:
step 100: continuously grinding the solid hazardous waste into powder;
step 200: mixing the powder of step 100 with a surfactant to form a primary mixture;
step 300: mixing the primary mixture with a liquid to form a secondary mixture;
step 400: continuously grinding the secondary mixture to form a solid hazardous material slurry;
step 500: storing the solid hazardous material slurry for later use.
To ensure accurate dosing, the solid hazardous waste of step 100 is weighed before grinding.
The continuous grinding quantity of the solid hazardous waste in the step 100 is 0.1 to 100 tons/hour according to different needs.
Typically, the surfactants in step 200 include: at least one of a cationic surfactant, an anionic surfactant, a zwitterionic surfactant, and a nonionic surfactant.
Generally, the surfactant is added in the step 200 in an amount of 0.01% -10% of the mass of the solid hazardous waste.
Additionally, the liquid in step 300 includes: organic wastewater discharged by the oil refining chemical device, oily sludge in the oil refining chemical sewage treatment device, and oily sludge generated by oil exploitation.
Specifically, the solid hazardous waste content in the solid hazardous waste slurry formed in step 400 is 1-90% by mass.
To effectively prevent settling, the solid hazardous material slurry in step 400 is kept under constant agitation.
According to the invention, the solid hazardous waste is ground and then mixed with the liquid under the action of the surfactant to form a uniform slurry mixture, and the prepared solid hazardous waste slurry can be sent to the entrained flow incinerator for harmless treatment, so that the harmless treatment efficiency of the solid hazardous waste is obviously improved.
The following describes the preparation system and the preparation method provided by the present invention in detail by specific examples with reference to fig. 1.
As shown in fig. 1, the overall working process of the solid hazardous waste slurry preparation system provided by the present invention is as follows: the solid hazardous material 400 is firstly conveyed to the weighing feeder 300 through a feeding pipeline, and the weighing feeder 300 conveys the solid hazardous material 400 into the grinding machine 100 through a feeding pipeline; subsequently, the surfactant is supplied to the grinder 100 through the surfactant line 600, and since the surfactant line is sequentially provided with the first flow meter 610 and the first flow rate adjustment valve 620, the input amount and the input flow rate of the surfactant can be controlled by the first flow meter 610 and the first flow rate adjustment valve 620, respectively; liquid is also supplied to the grinder 100 through the liquid line 700, and a second flow meter 710 and a second flow regulating valve 720 are sequentially provided on the liquid inlet and the liquid line 700 of the grinder 100 for controlling the flow rate and the flow rate of the input liquid, respectively; the solid hazardous material 400, surfactant and liquid continue to be ground in the grinder 100; the solid hazardous material slurry that meets the slurry standard is inputted into the slurry storage tank 200 through a pipeline connected to the grinder 100, and the slurry generated by the grinder 100 is gravity-fed into the slurry storage tank 200; while the stirring paddle 521 in the agitator 500 provided in the slurry storage tank 200 is constantly agitated, thereby effectively preventing the solid hazardous substance slurry from being deposited.
The following examples are provided to illustrate the specific parameters and conditions of the present invention in the preparation of solid hazardous material slurry.
Example one
In this example, the processing capacity of the solid hazardous waste copper acetylide spent catalyst slurry preparation system is: 2 tons/hour (t/h), the surfactant is an anionic surfactant, such as: the formaldehyde condensate of the sodium methyl naphthalene sulfonate and the sodium carboxymethyl cellulose, wherein the addition amount of the formaldehyde condensate of the sodium methyl naphthalene sulfonate is as follows: 0.006 ton/h (t/h), the addition amount of sodium carboxymethylcellulose is as follows: 0.004 ton/h, and the addition amount of the two surfactants is 0.03 percent and 0.02 percent of the mass of the solid hazardous waste. The added liquid is water, the adding amount of the water is 4.7 tons/hour (t/h), the concentration of the solid hazardous waste in the prepared solid hazardous material slurry is 30 percent, and the viscosity is as follows: 550 centipoise (cP), and the solid hazardous substances slurry has stable properties.
Example two
In this embodiment, the processing capacity of the oily sludge slurry preparation system of the sewage treatment device of the solid hazardous waste oil refining chemical plant is as follows: 3t/h, the surfactant is an anionic surfactant, such as: the formaldehyde condensate of the sodium methyl naphthalene sulfonate comprises the following components in percentage by weight: 0.018t/h, and the addition amount of the surfactant is 0.6 percent of the mass of the solid hazardous waste. The added liquid is also oily sewage, the adding amount of water is 2t/h, the concentration of the solid hazardous waste in the prepared solid hazardous substance slurry is 60%, the viscosity is 700cP, and the slurry property is stable.
EXAMPLE III
In this embodiment, the processing capacity of the oil-containing sludge slurry preparation system of the solid hazardous waste oil refining chemical plant is as follows: 8t/h, the surfactant is an anionic surfactant, such as: the formaldehyde condensate of the sodium methyl naphthalene sulfonate comprises the following components in percentage by weight: 0.8t/h, and the addition amount of the surfactant is 1.0 percent of the mass of the solid hazardous waste. The added liquid is waste diesel oil, the addition amount of the waste diesel oil is 4t/h, the concentration of the solid hazardous waste in the prepared solid hazardous substance slurry is 67%, the viscosity is 600cP, and the slurry property is stable.
Example four
In this example, the processing capacity of the oil-containing sludge slurry preparation system produced by the solid hazardous waste oil exploitation is as follows: 15/h, the surfactant is a formaldehyde condensate of sodium methyl naphthalene sulfonate, the addition amount is 0.09t/h, the added liquid is oily sewage, the addition amount of the oily sewage is 18t/h, the concentration of solid hazardous waste in the solid hazardous substance slurry is 45%, the viscosity is 500cP, and the slurry property is stable.
EXAMPLE five
In this embodiment, the processing capacity of the oil-containing sludge slurry preparation system generated by exploiting the solid hazardous waste petroleum is as follows: 50t/h, the surfactant is an anionic surfactant, such as: the formaldehyde condensate of the sodium methyl naphthalene sulfonate and the sodium carboxymethyl cellulose, wherein the addition amount of the formaldehyde condensate of the sodium methyl naphthalene sulfonate is as follows: 0.4 ton/h (t/h), wherein the addition amount of the sodium carboxymethyl cellulose is as follows: 0.3 ton/h, and the addition amount of the two surfactants is 0.8 percent and 0.6 percent of the mass of the solid hazardous waste. The added liquid is waste organic oil, the addition amount of the waste organic oil is 30t/h, the concentration of the prepared slurry is 62.5%, the viscosity is 600cP, and the slurry property is stable.
According to the embodiments, the entrained flow incineration technology is one of the key technologies for realizing the harmless conversion and utilization of the solid hazardous waste. Firstly, grinding solid hazardous waste into powder, secondly, uniformly mixing the ground powder with liquid under the action of a surfactant to form stable slurry, and finally, sending the slurry into an entrained flow incinerator for harmless treatment; the solid hazardous waste is made into slurry, so that the slurry state of the solid hazardous waste is realized, the solid hazardous waste is pressurized and is conveyed to the entrained flow incinerator for harmless treatment in the later period, and the efficiency of the harmless treatment of the solid hazardous waste is obviously improved.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, for example, the addition amounts of solid hazardous waste, surfactant and water can be adjusted as required. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (13)
1. A solid hazardous waste slurry preparation system, characterized in that, comprises a grinder (100) and a slurry storage tank (200) connected with the grinder (100), the grinder (100) is provided with a solid hazardous material inlet, a surfactant inlet and a liquid inlet; solid hazardous material, surfactant and liquid are fed into the mill (100) through the solid hazardous material feed port, the surfactant feed port and the liquid feed port, respectively, to be milled and formed into a solid hazardous material slurry which is fed into the slurry storage tank (200).
2. The solid hazardous waste slurry preparation system of claim 1, wherein the solid hazardous waste feed inlet is connected to a weigh feeder (300), and the solid hazardous waste (400) is weighed by the weigh feeder (300) and fed from the solid hazardous waste feed inlet to the grinding mill (100).
3. The solid hazardous waste slurry preparation system according to claim 1, wherein an agitator (500) is provided on the slurry storage tank (200), the agitator (500) comprising a driving mechanism (510), a stirring rod (520) and a stirring paddle (521) provided at an end of the stirring rod (520), the stirring paddle (521) protruding into the interior of the slurry storage tank (200).
4. The solid hazardous waste slurry preparation system according to claim 1, wherein the surfactant feed port is connected to a surfactant line (600), and the surfactant line (600) is provided with a first flow meter (610) for measuring the amount of the added surfactant and a first flow regulating valve (620) for controlling the amount of the added surfactant, respectively.
5. The solid hazardous waste slurry preparation system according to claim 1, wherein the liquid feed port is connected to a liquid line (700), and a second flow meter (710) for measuring the liquid addition amount and a second flow regulating valve (720) for controlling the liquid addition flow amount are respectively provided on the liquid line (700).
6. A method for preparing solid hazardous waste slurry is characterized by comprising the following steps:
step 100: continuously grinding the solid hazardous waste into powder;
step 200: mixing the powder of step 100 with a surfactant to form a primary mixture;
step 300: mixing the primary mixture with a liquid to form a secondary mixture;
step 400: continuously grinding the secondary mixture to form a solid hazardous material slurry;
step 500: storing the solid hazardous material slurry for later use.
7. The method for preparing a slurry of solid hazardous waste according to claim 6, wherein the solid hazardous waste in step 100 is metered and weighed before grinding.
8. The method for preparing a slurry of solid hazardous waste according to claim 6, wherein the amount of continuously grinding the solid hazardous waste in the step 100 is 0.1-100 tons/hour.
9. The method of preparing a solid hazardous waste slurry according to claim 6, wherein said surfactant in step 200 comprises: at least one of a cationic surfactant, an anionic surfactant, a zwitterionic surfactant, and a nonionic surfactant.
10. The method for preparing a solid hazardous waste slurry according to claim 9, wherein the surfactant is added in an amount of 0.01-10% by mass of the solid hazardous waste in the step 200.
11. The method of preparing a solid hazardous waste slurry according to claim 6, wherein said liquid in step 300 comprises: organic wastewater discharged by the oil refining chemical device, oily sludge in the oil refining chemical sewage treatment device, and oily sludge generated by oil exploitation.
12. The method of preparing a solid hazardous waste slurry according to claim 6, wherein the solid hazardous waste slurry formed in step 400 has a solid hazardous waste content of 1-90% by mass.
13. The method of preparing a solid hazardous waste slurry according to claim 6, wherein the solid hazardous waste slurry in step 400 is kept under constant agitation.
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| CN202010561421.7A CN113814252A (en) | 2020-06-18 | 2020-06-18 | Solid hazardous waste slurry preparation system and preparation method thereof |
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| CN202010561421.7A CN113814252A (en) | 2020-06-18 | 2020-06-18 | Solid hazardous waste slurry preparation system and preparation method thereof |
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Application publication date: 20211221 |