CN111056887A - Method for producing emulsion explosive by recycling explosive production wastewater - Google Patents
Method for producing emulsion explosive by recycling explosive production wastewater Download PDFInfo
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- CN111056887A CN111056887A CN201911334027.3A CN201911334027A CN111056887A CN 111056887 A CN111056887 A CN 111056887A CN 201911334027 A CN201911334027 A CN 201911334027A CN 111056887 A CN111056887 A CN 111056887A
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- explosive
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- 239000002351 wastewater Substances 0.000 title claims abstract description 92
- 239000002360 explosive Substances 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 239000000839 emulsion Substances 0.000 title claims abstract description 33
- 238000004064 recycling Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 238000004062 sedimentation Methods 0.000 claims abstract description 16
- 239000004519 grease Substances 0.000 claims abstract description 14
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000004202 carbamide Substances 0.000 claims abstract description 8
- 238000007710 freezing Methods 0.000 claims abstract description 8
- 230000008014 freezing Effects 0.000 claims abstract description 8
- 239000000654 additive Substances 0.000 claims abstract description 7
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003795 chemical substances by application Substances 0.000 abstract description 8
- 230000008961 swelling Effects 0.000 abstract description 7
- 239000010842 industrial wastewater Substances 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract 1
- 239000002918 waste heat Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 235000010344 sodium nitrate Nutrition 0.000 description 2
- 239000004317 sodium nitrate Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B31/00—Compositions containing an inorganic nitrogen-oxygen salt
- C06B31/28—Compositions containing an inorganic nitrogen-oxygen salt the salt being ammonium nitrate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/22—Treatment of water, waste water, or sewage by freezing
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A method for producing emulsion explosive by recycling explosive production wastewater relates to the technical field of wastewater recycling, and comprises the following steps of 1, primarily filtering the wastewater; step 2, the wastewater enters a wastewater recycling system for treatment, freezing filtration and grease removal are carried out on the wastewater in a 6-stage oil separation sedimentation tank, waste heat recovery is carried out, and the wastewater finally enters a wastewater collection tank; and 3, adding the wastewater in the wastewater collection tank into a water phase dissolving tank, adding the raw materials and auxiliary additives, and heating for dissolving to obtain the emulsion explosive. The invention has the beneficial effects that: the method fully and reasonably utilizes the industrial wastewater, fully recycles the industrial wastewater, is used for producing the emulsion explosive, and simultaneously adopts the method of adding the glycol and the urea to enhance the surface tension between an emulsion oil film and an ammonium nitrate solution so as to eliminate the negative influence of a swelling agent on an emulsion system, thereby eliminating the influence of the remaining swelling agent in the wastewater on the storage period and the frost resistance of the emulsion explosive.
Description
Technical Field
The invention relates to the technical field of wastewater recycling, in particular to a method for producing an emulsion explosive by recycling explosive production wastewater.
Background
Expanded ammonium nitrate explosive production line and emulsion explosive production line can produce a large amount of waste water in process of production, and expanded ammonium nitrate explosive crystallization process can produce a large amount of waste water, account for more than 90% of this enterprise's waste water, and the change of emulsion production line matrix cooling water can produce a small amount of waste water, and the production line is cleaned the health, is washed the floor, cleaning equipment also can produce a small amount of waste water, and the main pollutant in these waste waters all is ammonium nitrate, but not the same. Particularly, the waste water generated by the expansion production line contains ammonium nitrate, and trace grease and expanding agent.
The production wastewater mainly comprises the following types:
wastewater A: the expanded ammonium nitrate explosive expanded crystallization process wastewater has the main pollutants of: ammonium nitrate, as well as grease and swelling agent (which is a surfactant and can remarkably reduce the surface tension of ammonium nitrate solution so as to influence the water-in-oil system of emulsion); wastewater B: the replacement of the substrate cooling water of the emulsification production line can produce a small amount of wastewater, and the main pollutants are: ammonium nitrate and oil; wastewater C: the main pollutants of the emulsion production line oil phase tank washing water are: grease and emulsifier; wastewater D: the main pollutants of the water phase tank flushing water of the emulsification production line are: ammonium nitrate, sodium nitrate; waste water E, F: other cleaning water, ammonium nitrate, sodium nitrate, and oil and fat.
In the past, the method of ground seepage is adopted to treat the waste water, so that the risk of stealing and discharging the sewage exists, and the requirement of environmental protection is not met. The method recycles the waste water for the production of the emulsion explosive, but the grease and the swelling agent contained in the waste water influence the quality of the emulsion explosive, and repeated tests and detection show that the storage period and the frost resistance of the emulsion explosive are influenced by the swelling agent existing in trace amount.
Disclosure of Invention
In order to solve the problems of the prior art, the invention provides a method for producing an emulsion explosive by recycling explosive production wastewater. The expanded explosive and the emulsion explosive production wastewater are recycled and treated, and the reagent is adopted for production of the emulsion explosive after being adjusted, so that the emulsion explosive meeting the specified requirements is produced.
The invention provides a method for producing an emulsion explosive by recycling explosive production wastewater, which comprises the following steps:
step 1, carrying out primary filtration on the waste water A, B, C, D, E, F;
and 3, adding the wastewater in the wastewater collection tank into a water phase dissolving tank, adding the raw materials and auxiliary additives, and heating and dissolving for emulsion explosive production.
A water outlet is arranged in a workshop where sewage needs to be discharged, a water outlet A, F is arranged in an expanded explosive production workshop, and a water outlet B, C, D, E is arranged in an emulsion explosive production workshop.
In the step 1, the treatment process of the waste water A, B, C comprises the following steps: respectively flows into a hot water drain pipe through a water outlet A, B, C and then enters a wastewater recycling system; the waste water D, E, F flows into a normal temperature drain pipe through a drain port D, E, F respectively and then enters a waste water recycling system; the water discharge ports A, B, C, D, E, F are each provided with a grizzly screen for removing coarse suspended matter.
In the step 2, the freezing temperature of freezing filtration is 0 ℃ for removing the grease solidified into solid at zero temperature, and the 6-grade oil separation sedimentation tank is used for removing most of the residual grease.
In the step 3, the auxiliary additives are ethylene glycol and urea, the addition amount of the ethylene glycol is 0.35-45% of the total mass of the raw materials and the water in the tank, and the addition amount of the urea is 0.50-0.6% of the total mass of the raw materials and the water in the tank.
The oil separation sedimentation tank realizes the treatment effect of oil separation sedimentation by overflowing the wastewater layer by layer in the sedimentation tank.
The wastewater collection tank is a stainless steel tank with the volume of 50 cubic meters, is arranged below 2 meters underground, and has a heat preservation effect;
the invention has the beneficial effects that: the industrial wastewater is fully and reasonably utilized, is fully recycled and is used for producing the emulsion explosive, and meanwhile, the method of adding the glycol and the urea is adopted to enhance the surface tension between an emulsion oil film and an ammonium nitrate solution so as to eliminate the negative influence of a swelling agent on an emulsion system, thereby eliminating the influence of the remaining swelling agent in the wastewater on the storage period and the frost resistance of the emulsion explosive.
Drawings
FIG. 1 is a flow chart of the treatment of industrial wastewater according to the present invention;
FIG. 2 is a schematic view of a wastewater recycling system according to example 1;
in the figure: 1. the system comprises a hot water discharge pipe, 2, a cooling box, 3, a compressor, 4, a capillary tube, 5, a heat exchange tube, 6, a heating box, 7, valves A and 8, a pump, 9, a water phase dissolving tank, 10, valves B and 11, an oil separation sedimentation tank, 12, an underground water pipe, 13, a filter screen, 14, a normal temperature water discharge pipe, 15, valves C and 16 and a waste water collecting tank.
Detailed Description
Embodiment 1, as shown in the figure, the present invention provides a method for producing an emulsion explosive by recycling explosive production wastewater, comprising the following steps:
step 1, carrying out primary filtration on the waste water A, B, C, D, E, F;
and 3, adding the wastewater in the wastewater collection tank into a water phase dissolving tank, adding the raw materials and auxiliary additives, and heating and dissolving for emulsion explosive production.
In the step 1, the treatment process of the waste water A, B, C comprises the following steps: respectively flows into a hot water drain pipe through a water outlet A, B, C and then enters a wastewater recycling system; the waste water D, E, F flows into a normal temperature drain pipe through a drain port D, E, F respectively and then enters a waste water recycling system; the water discharge ports A, B, C, D, E, F are each provided with a grizzly screen.
In the step 2, the freezing temperature of freezing filtration is 0 ℃ for removing the grease solidified into solid at zero temperature, and the 6-grade oil separation sedimentation tank is used for removing most of the residual grease.
In the step 3, the auxiliary additives are ethylene glycol and urea, the addition amount of the ethylene glycol is 0.35-45% of the total mass of the raw materials and the water in the tank, and the addition amount of the urea is 0.50-0.6% of the total mass of the raw materials and the water in the tank.
The waste water recycling system adopted in the step 2 is as follows: the hot drain pipe (1) is connected with the cooling box (2), the lower part of the cooling box (2) is provided with a detachable filter screen (13), the water outlet of the cooling box (2) is connected with an underground water pipe (12), the underground water pipe (12) is connected with an oil-separating sedimentation tank (11), the oil-separating sedimentation tank (11) is provided with 6 groups, the last group of oil-separating sedimentation tank (11) is connected with a waste water collecting tank (16), the bottom of the waste water collecting tank (16) is connected with the water inlet of the heating box (6) through a pump (8), the heating box (6) is provided with an upper water outlet and a lower water outlet, the upper water outlet is connected with the water phase dissolving tank (9) through the pump (8), the upper water outlet is provided with a valve A (7), the lower water outlet is connected with the waste water collecting tank (16), the lower water outlet is provided with a valve C (15), the middle part of the waste water collecting tank (, a valve B (10) is arranged between the pump (8) and the water phase dissolving tank (9).
When the hot water drainage pipe (1) drains water and the water phase dissolving tank (9) needs to be added with water, the valve A (7) is opened, the valve C (15) and the valve B (10) are closed, heat in the wastewater is directly converted into the heating box (6), and the heated water is injected into the water phase dissolving tank (9);
when the hot water drainage pipe (1) drains water but the water phase dissolving tank (9) does not need to add water, the valve C (15) is opened, the valve A (7) and the valve B (10) are closed, heat in the wastewater is converted into the heating box (6), and water is circulated between the heating box (6) and the wastewater collecting tank (16);
when the hot water drainage pipe (1) does not drain water, but the water phase dissolving tank (9) needs to be added with water, the valve A (7) and the valve C (15) are closed, the valve B (10) is opened, and the water in the waste water collecting tank (16) is added into the water phase dissolving tank (9);
the hot water discharge pipe (1) receives waste water discharged from the water discharge port A, B, C; the underground water pipe (12) is also connected with a normal temperature drain pipe (14) and receives waste water without grease or with extremely low grease content, namely the waste water discharged from a drain port D, E, F.
And heat exchange tubes (5) are arranged in the cooling box (2) and the heating box (6), one ends of the two groups of heat exchange tubes are connected through a capillary tube (4), and the other ends of the two groups of heat exchange tubes are connected with a compressor (3). Refrigerant in the compressor (3) flows into the heat exchange tube (5) of the cooling box (2), flows through the heat exchange tube (5) in the heating box (6) through the capillary tube (4) and flows back to the compressor (3), and circulation of heat absorption and heat release is realized.
The oil separation sedimentation tank realizes the treatment effect of oil separation sedimentation by overflowing the wastewater layer by layer in the sedimentation tank.
The wastewater collection tank is a stainless steel tank with the volume of 50 cubic meters, is arranged below 2 meters underground, and has a heat preservation effect.
Claims (3)
1. A method for producing emulsion explosive by recycling explosive production wastewater is characterized by comprising the following steps: the method comprises the following steps:
step 1, carrying out primary filtration on the waste water A, B, C, D, E, F;
step 2, the wastewater after primary filtration enters a wastewater recycling system for treatment, freezing filtration and grease removal of a 6-stage oil separation sedimentation tank are carried out, and the wastewater finally enters a wastewater collection tank;
and 3, adding the wastewater in the wastewater collection tank into a water phase dissolving tank, adding the raw materials and auxiliary additives, and heating and dissolving for emulsion explosive production.
2. The method for producing the emulsion explosive by recycling the explosive production wastewater according to claim 1, which is characterized by comprising the following steps: in the step 1, the treatment process of the waste water A, B, C comprises the following steps: respectively flows into a hot water drain pipe through a water outlet A, B, C and then enters a wastewater recycling system; the waste water D, E, F flows into a normal temperature drain pipe through a drain port D, E, F respectively and then enters a waste water recycling system; the water discharge ports A, B, C, D, E, F are each provided with a grizzly screen.
3. The method for producing the emulsion explosive by recycling the explosive production wastewater according to claim 1, which is characterized by comprising the following steps: in the step 3, the auxiliary additives are ethylene glycol and urea, the addition amount of the ethylene glycol is 0.35-45% of the total mass of the raw materials and the water in the tank, and the addition amount of the urea is 0.50-0.6% of the total mass of the raw materials and the water in the tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911334027.3A CN111056887A (en) | 2019-12-23 | 2019-12-23 | Method for producing emulsion explosive by recycling explosive production wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911334027.3A CN111056887A (en) | 2019-12-23 | 2019-12-23 | Method for producing emulsion explosive by recycling explosive production wastewater |
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| CN111056887A true CN111056887A (en) | 2020-04-24 |
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| CN201911334027.3A Pending CN111056887A (en) | 2019-12-23 | 2019-12-23 | Method for producing emulsion explosive by recycling explosive production wastewater |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH321532A (en) * | 1952-08-27 | 1957-05-15 | Ici Ltd | Process for the processing of the used washing water of explosive nitric acid esters |
| US5011614A (en) * | 1988-04-20 | 1991-04-30 | Dynamit Nobel Ag | Process for the decomposition of explosive nitric acid esters dissolved in wastewaters |
| CN102276373A (en) * | 2011-07-06 | 2011-12-14 | 杨峰 | Porous granular ammonium oil explosive adhesive |
| CN102603433A (en) * | 2011-10-20 | 2012-07-25 | 薛世忠 | Device and method for zero emission preparation of aqueous oxidizer salt solution |
| CN103787800A (en) * | 2014-01-27 | 2014-05-14 | 唐文庆 | Method for preparing ammonium nitrate composite explosive by using organic waste |
| CN108413827A (en) * | 2018-03-14 | 2018-08-17 | 安徽理工大学 | A kind of the destruction retracting device and method of waste emulsified explosive |
| CN109516611A (en) * | 2019-01-24 | 2019-03-26 | 洛阳森达乳化剂有限公司 | A kind of processing method of emulsion waste liquid |
| CN208648938U (en) * | 2018-08-03 | 2019-03-26 | 中国葛洲坝集团易普力股份有限公司 | Scrap rubber body recycling system in emulsion cooling water |
-
2019
- 2019-12-23 CN CN201911334027.3A patent/CN111056887A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH321532A (en) * | 1952-08-27 | 1957-05-15 | Ici Ltd | Process for the processing of the used washing water of explosive nitric acid esters |
| US5011614A (en) * | 1988-04-20 | 1991-04-30 | Dynamit Nobel Ag | Process for the decomposition of explosive nitric acid esters dissolved in wastewaters |
| CN102276373A (en) * | 2011-07-06 | 2011-12-14 | 杨峰 | Porous granular ammonium oil explosive adhesive |
| CN102603433A (en) * | 2011-10-20 | 2012-07-25 | 薛世忠 | Device and method for zero emission preparation of aqueous oxidizer salt solution |
| CN103787800A (en) * | 2014-01-27 | 2014-05-14 | 唐文庆 | Method for preparing ammonium nitrate composite explosive by using organic waste |
| CN108413827A (en) * | 2018-03-14 | 2018-08-17 | 安徽理工大学 | A kind of the destruction retracting device and method of waste emulsified explosive |
| CN208648938U (en) * | 2018-08-03 | 2019-03-26 | 中国葛洲坝集团易普力股份有限公司 | Scrap rubber body recycling system in emulsion cooling water |
| CN109516611A (en) * | 2019-01-24 | 2019-03-26 | 洛阳森达乳化剂有限公司 | A kind of processing method of emulsion waste liquid |
Non-Patent Citations (2)
| Title |
|---|
| UZAIRA RAFIQUE;SAIMA NASREEN;FAIZA HUSSNAIN: "Treatment of explosive industrial pollutants:a comparative analysis" * |
| 何丽莉,王莹: "FOX-7合成废水回用处理方法研究现状" * |
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Application publication date: 20200424 |