CN112387102A - Process and device for efficiently and environmentally treating waste gas and waste liquid in production process of propionyltrione and chloramine - Google Patents
Process and device for efficiently and environmentally treating waste gas and waste liquid in production process of propionyltrione and chloramine Download PDFInfo
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- CN112387102A CN112387102A CN202011317680.1A CN202011317680A CN112387102A CN 112387102 A CN112387102 A CN 112387102A CN 202011317680 A CN202011317680 A CN 202011317680A CN 112387102 A CN112387102 A CN 112387102A
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- waste
- chloramine
- production process
- gas
- waste gas
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- 239000002912 waste gas Substances 0.000 title claims abstract description 44
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000002699 waste material Substances 0.000 title claims abstract description 31
- QDHHCQZDFGDHMP-UHFFFAOYSA-N Chloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000007788 liquid Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 38
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000010521 absorption reaction Methods 0.000 claims abstract description 33
- 239000003513 alkali Substances 0.000 claims abstract description 23
- 239000002904 solvent Substances 0.000 claims abstract description 15
- 238000009833 condensation Methods 0.000 claims abstract description 14
- 230000005494 condensation Effects 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 5
- -1 propionyl trione Chemical compound 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000002894 chemical waste Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- XVSARAAHPIOQAW-UHFFFAOYSA-N nonane-3,4,5,6,7-pentone Chemical compound CCC(=O)C(=O)C(=O)C(=O)C(=O)CC XVSARAAHPIOQAW-UHFFFAOYSA-N 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000012855 volatile organic compound Substances 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/38—Separation; Purification; Stabilisation; Use of additives
- C07C17/395—Separation; Purification; Stabilisation; Use of additives by treatment giving rise to a chemical modification of at least one compound
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention belongs to the technical field of chemical waste gas and liquid treatment, and particularly relates to a process and a device for efficiently and environmentally treating waste gas and waste liquid in the production process of propionyltrione and chloramine. According to the efficient and environment-friendly treatment process for the waste gas and the waste liquid in the production process of the propionetrione and the chloramine, the waste gas generated in the production process of the propionetrione and the chloramine is absorbed by alkali liquor respectively and then sequentially passes through primary condensation and secondary condensation, and the recovered solvent is reserved; the condensed waste gas is converged, subjected to multi-stage absorption and detection, and then enters an RTO system for incineration; the RTO system is connected with the waste methanol storage tank. The treatment process disclosed by the invention is scientific and reasonable in design and convenient to operate, realizes the recycling of the solvent and the recycling of the waste methanol, reduces the production cost, is energy-saving and environment-friendly, and has remarkable economic benefit; meanwhile, the invention provides a high-efficiency environment-friendly treatment device.
Description
Technical Field
The invention belongs to the technical field of chemical waste gas and liquid treatment, and particularly relates to a process and a device for efficiently and environmentally treating waste gas and waste liquid in the production process of propionyltrione and chloramine.
Background
The propionyl trione workshop at the earlier stage mainly discharges waste gas into the atmosphere after the waste gas is absorbed by the activated carbon, and the waste gas contains more impurities, so that a carbon layer is blocked, the adsorption effect is poor, and the activated carbon after absorbing the waste gas forms new dangerous solid-waste activated carbon.
The waste gas in the production process of the chloramine also contains a recyclable solvent of dichloromethane, and in addition, a large amount of waste methanol cannot be treated every day in a plant.
Therefore, the treatment of waste gas and water is urgently needed to be solved from the viewpoint of environmental protection and cost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a high-efficiency environment-friendly treatment process for waste gas and waste liquid in the production process of propionyltrione and chloramine, which has scientific and reasonable design and convenient operation, realizes the recycling of solvent and the reuse of waste methanol, reduces the production cost, is energy-saving and environment-friendly and has obvious economic benefit; meanwhile, the invention provides a high-efficiency environment-friendly treatment device.
According to the efficient and environment-friendly treatment process for the waste gas and the waste liquid in the production process of the propionetrione and the chloramine, the waste gas generated in the production process of the propionetrione and the chloramine is absorbed by alkali liquor respectively and then sequentially passes through primary condensation and secondary condensation, and the recovered solvent is reserved; the condensed waste gas is converged, subjected to multi-stage absorption and detection, and then enters an RTO system for incineration; the RTO system is connected with the waste methanol storage tank.
Preferably, after the waste gas is subjected to multistage absorption detection, an explosion-proof induced draft fan is introduced into the RTO system.
The RTO system is an RTO three-bed circulating incinerator.
Preferably, an online monitoring system is arranged on a pipeline at the tail end of the RTO system.
Preferably, the condensed exhaust gas is merged and passes through 4-6 stages of absorption.
The high-efficiency environment-friendly treatment device for the tail gas and the waste liquid in the production process of the propionyltrione and the chloramine is characterized in that a propionyltrione production waste gas pipeline is connected with an alkali liquid absorption tower A, a primary condenser A and a secondary condenser A; the chloramine production waste gas pipeline is connected with an alkali liquor absorption tower B, a primary condenser B and a secondary condenser B, the secondary condenser A and the secondary condenser B are both connected with a multistage absorption tower, and the multistage absorption tower is sequentially connected with a gas detector, an explosion-proof induced draft fan and an RTO system; an automatic interlocking vent valve and an automatic interlocking stop valve are arranged on an air inlet main pipeline of the RTO system; the RTO system is connected with the waste methanol storage tank; the second-stage condenser A and the second-stage condenser B are respectively connected with the solvent recovery tank.
Preferably, the RTO system is connected to an online monitoring system.
Preferably, the RTO system is also connected to a demineralized water storage tank.
Preferably, the alkali liquor absorption tower A and the alkali liquor absorption tower B are respectively connected with an alkali liquor feeder.
The method comprises the steps of collecting waste gas generated in each workshop section through a negative pressure pipeline, washing the waste gas with alkali, condensing and recycling a solvent in the waste gas through two-stage condensation, cooling the waste gas to about 10 ℃ after the waste gas is subjected to primary condensation, cooling the waste gas to about-5 ℃ after the waste gas is subjected to secondary condensation, condensing the solvent in the tail gas for two times, and recycling the solvent; through multi-stage absorption, acid gas in the tail gas can be neutralized, odor in the tail gas can be absorbed, and then the gas entering the incinerator is ensured to be alkaline after absorption and adjustment; after the gas detector detects, the gas concentration entering the incinerator is detected, so that the gas concentration is prevented from being too high to cause flash explosion, and the concentration is automatically linked when exceeding the standardClosing the lock shut-off valve, opening the automatic interlocking emptying valve, and carrying out next treatment on the ultra-concentration gas; when the concentration is less than the set value, the automatic interlocking emptying valve is closed, the automatic interlocking stop valve is opened, the gas enters the incinerator, and the incinerated gas is discharged after being qualified through online detection. Waste methanol in a plant is used as fuel and sent into a heat accumulating type oxidizer for combustion, and the produced high-temperature flue gas with the temperature of about 850 ℃ oxidizes VOCs of two waste gases into CO2Mixing with water, and discharging after reaching standards; the redundant heat is used for heating softened water as process heat.
Compared with the prior art, the invention has the following beneficial effects:
(1) the waste gas treated by the process of the invention mainly contains CO2Can reach the national exhaust emission standard; the heat can be recycled, and energy conservation and emission reduction can be achieved; about 20% of dichloromethane is recovered, the recovery heat is about 90 ten thousand calories, and the cost is obviously reduced;
(2) the processing device has the advantages of simple connection among all devices and easy operation.
Drawings
FIG. 1 is a schematic view of the structure of a processing apparatus according to the present invention;
in the figure: 1. an alkali liquor absorption tower A; 2. an alkali liquor absorption tower B; 3. a first-stage condenser B; 4. a secondary condenser B; 5. a solvent recovery tank; 6. a multistage absorption tower; 7. a waste methanol storage tank; 8. an exhaust valve; 9. an online monitoring system; 10. an RTO system; 11. a softened water storage tank; 12. an explosion-proof induced draft fan; 13. an automatic interlocking shut-off valve; 14. an automatic interlock vent valve; 15. a gas detector; 16. a secondary condenser A; 17. a first-stage condenser A.
Detailed Description
The present invention is further described below with reference to examples.
Example 1
As shown in figure 1, a propionyl triketone and chloramine production process tail gas and high-efficient environmental protection processing unit of waste liquid, propionyl triketone produces the waste gas pipeline and couples to alkali absorption tower A1, first-class condenser A17, second-class condenser A16; the chloramine production waste gas pipeline is connected with an alkali liquor absorption tower B2, a primary condenser B3 and a secondary condenser B4, both the secondary condenser A16 and the secondary condenser B4 are connected with a multistage absorption tower 6, and the multistage absorption tower 6 is sequentially connected with a gas detector 15, an explosion-proof induced draft fan 12 and an RTO system 10; an automatic interlocking emptying valve 14 and an automatic interlocking cut-off valve 13 are arranged on an air inlet main pipeline of the RTO system 10; the RTO system 10 is connected with the waste methanol storage tank 7; the secondary condenser a17 and the secondary condenser B4 are connected to the solvent recovery tank 5, respectively.
The RTO system 10 is connected to an online monitoring system 9.
The RTO system 10 is also connected to a softened water storage tank 11.
The RTO system 10 is an RTO three-bed circulating incinerator.
The alkali liquor absorption tower A1 and the alkali liquor absorption tower B2 are respectively connected with an alkali liquor feeder.
When the device is applied to treating waste gas and waste liquid in the production process of propionyltrione and chloramine, the waste gas generated in the production process of propionyltrione and chloramine is collected through a negative pressure pipeline, the waste gas is absorbed by alkali liquor respectively, and then sequentially passes through primary condensation and secondary condensation, the temperature is reduced to about 10 ℃ after the primary condensation, the temperature is reduced to about-5 ℃ after the secondary condensation, the solvent in tail gas can be completely condensed after the secondary condensation, and then the solvent is recycled; the condensed waste gas is converged, subjected to six-stage absorption and detection, and then enters an RTO system 10 for incineration, wherein 1-3 stages are liquid caustic absorption, and acid gas in tail gas is neutralized to pH 7-8; the grade 4-5 is sodium hypochlorite absorption for absorbing the odor in the tail gas; grade 6 is liquid alkali absorption, and the pH value is adjusted to 7-8 to ensure that the gas entering the incinerator is alkaline; after the gas is detected by the gas detector 15, the concentration of the gas entering the incinerator is detected, so that flash explosion caused by too high gas concentration is prevented, the automatic interlocking cut-off valve 13 is closed when the concentration exceeds the standard, the automatic interlocking vent valve 14 is opened, and the super-concentration gas is processed in the next step; when the concentration is less than the set concentration, the automatic interlocking emptying valve 14 is closed, the automatic interlocking stop valve 13 is opened, and the waste gas enters the incinerator; waste methanol in a plant is used as fuel and sent into a heat accumulating type oxidizer for combustion, and the produced high-temperature flue gas with the temperature of about 850 ℃ oxidizes VOCs of two waste gases into CO2Mixing with water, and discharging after reaching standards; the redundant heat is used for heating softened water as process heat.
Claims (9)
1. A process for efficiently and environmentally treating waste gas and waste liquid in the production process of propionyltrione and chloramine is characterized by comprising the following steps: waste gases generated in the production process of the propionyl trione and the chloramine are respectively absorbed by alkali liquor, and then sequentially pass through primary condensation and secondary condensation, and the recovered solvent is reserved; condensed waste gas is converged, subjected to multi-stage absorption and detection, and then enters an RTO system (10) for incineration; the RTO system (10) is connected with the waste methanol storage tank (7).
2. The efficient and environment-friendly treatment process for the tail gas and the waste liquid in the production process of propionetrione and chloramine according to claim 1, which is characterized in that: after the waste gas is subjected to multi-stage absorption detection, an explosion-proof induced draft fan (12) is introduced into the RTO system (10).
3. The efficient and environment-friendly treatment process for the tail gas and the waste liquid in the production process of propionetrione and chloramine according to claim 2, which is characterized in that: the RTO system (10) is an RTO three-bed circulating incinerator.
4. The efficient and environment-friendly treatment process for the tail gas and the waste liquid in the production process of propionetrione and chloramine according to claim 1, which is characterized in that: an online monitoring system (9) is arranged on a pipeline at the tail end of the RTO system (10).
5. The efficient and environment-friendly treatment process for the tail gas and the waste liquid in the production process of propionetrione and chloramine according to claim 1, which is characterized in that: the condensed waste gas is converged and absorbed by 4-6 stages.
6. The efficient environmental-protection treatment device for the tail gas and waste liquid in the production process of propionitric triketone and chloramine as claimed in any one of claims 1 to 5, which is characterized in that: the propionyl trione production waste gas pipeline is connected with an alkali liquor absorption tower A (1), a first-stage condenser A (17) and a second-stage condenser A (16); the chloramine production waste gas pipeline is connected with an alkali liquor absorption tower B (2), a first-stage condenser B (3) and a second-stage condenser B (4), a second-stage condenser A (16) and the second-stage condenser B (4) are both connected with a multi-stage absorption tower (6), and the multi-stage absorption tower (6) is sequentially connected with a gas detector (15), an explosion-proof induced draft fan (12) and an RTO system (10); an air inlet main pipeline of the RTO system (10) is provided with an automatic interlocking emptying valve (14) and an automatic interlocking cut-off valve (13); the RTO system (10) is connected with the waste methanol storage tank (7); the secondary condenser A (16) and the secondary condenser B (4) are respectively connected with the solvent recovery tank (5).
7. The efficient and environment-friendly treatment device for the tail gas and the waste liquid in the production process of propionetrione and chloramine according to claim 6, which is characterized in that: the RTO system (10) is connected with the online monitoring system (9).
8. The efficient and environment-friendly treatment device for the tail gas and the waste liquid in the production process of propionetrione and chloramine according to claim 6, which is characterized in that: the RTO system (10) is also connected to a demineralized water storage tank (11).
9. The efficient and environment-friendly treatment device for the tail gas and the waste liquid in the production process of propionetrione and chloramine according to claim 6, which is characterized in that: the alkali liquor absorption tower A (1) and the alkali liquor absorption tower B (2) are respectively connected with an alkali liquor feeder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011317680.1A CN112387102A (en) | 2020-11-20 | 2020-11-20 | Process and device for efficiently and environmentally treating waste gas and waste liquid in production process of propionyltrione and chloramine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011317680.1A CN112387102A (en) | 2020-11-20 | 2020-11-20 | Process and device for efficiently and environmentally treating waste gas and waste liquid in production process of propionyltrione and chloramine |
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| Publication Number | Publication Date |
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| CN112387102A true CN112387102A (en) | 2021-02-23 |
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|---|---|---|---|
| CN202011317680.1A Pending CN112387102A (en) | 2020-11-20 | 2020-11-20 | Process and device for efficiently and environmentally treating waste gas and waste liquid in production process of propionyltrione and chloramine |
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| CN (1) | CN112387102A (en) |
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Application publication date: 20210223 |