CN207445913U - Epoxychloropropane chlorination workshop section tail gas absorbing system - Google Patents
Epoxychloropropane chlorination workshop section tail gas absorbing system Download PDFInfo
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- CN207445913U CN207445913U CN201721429291.1U CN201721429291U CN207445913U CN 207445913 U CN207445913 U CN 207445913U CN 201721429291 U CN201721429291 U CN 201721429291U CN 207445913 U CN207445913 U CN 207445913U
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Abstract
The utility model belongs to chemical reaction vent gas treatment field, relates generally to a kind of epoxychloropropane chlorination workshop section tail gas absorbing system；Including chlorinating container and water absorption tower, further include glycerine absorption tower and alkali adsorption tower, the chlorinating container is connected with glycerine absorption tower, glycerine absorption tower upper end connects glycerine absorber cooler, lower end connects glycerine absorption cycle slot, glycerine absorption cycle slot is connected again with chlorinating container, so as to which chlorinating container and glycerine absorption tower form closed-loop system；Glycerine absorption tower is also connected with water absorption tower, and water absorption tower is connected with alkali adsorption tower, alkali adsorption tower connection exhaust tube.Unreacted hydrogen chloride recycles in the gas that the utility model will be discharged in chlorinating container, has saved cost, has passed through simultaneously：Glycerine absorption+water absorption+Alkali absorption links handle the pernicious gas absorption in tail gas so that the gas of discharge more safety and environmental protection.
Description
Technical field
The utility model belongs to chemical reaction vent gas treatment field, relates generally to a kind of epoxychloropropane chlorination workshop section tail gas
Absorption system.
Background technology
Epoxychloropropane is a kind of important Organic Chemicals and fine chemical product, for producing epoxy resin, water
Handle resin, reinforced resin, synthetic glycerine and glycidyl ethers and lipid.Epoxychloropropane is produced with glycerine, hydrogen chloride
For starting material, under the action of catalyst adipic acid, chlorination (substitution) occurs and reacts, generation dichlorohydrin (abbreviation DCH), two
Chloropropyl alcohol obtains product epoxychloropropane (abbreviation ECH) with liquid caustic soda through cyclization.
Chlorination reaction equation is as follows：
Above-mentioned reaction is reversible exothermic reaction, and hydrogen chloride gas is excessive during production, so as to improve positive reaction rate, is increased sweet
Oily conversion ratio.The chlorinating container of continuity method production ECH is generally the graphite reaction kettle that band stirs, glycerine and hydrogen chloride continuously into
Material, occurs chlorination reaction, 120 DEG C of reaction temperature ＜, reaction pressure is micro-positive pressure under the effect of the catalyst.Unreacted chlorination
Hydrogen and the moisture of generation are risen to through kettle top vapor delivery line in condenser, and moisture is discharged with condensate liquid, fixed gas to tail gas absorption, no
Solidifying gas is mainly the moisture of HCl and carrying, DCH etc..Tail gas absorption generally absorbs tower process using water.The salt that water absorbs
Acid can enter desorption workshop section, obtain hydrogen chloride, this technique needs to consume a large amount of steam energy.
Above-mentioned existing process there are the defects of：Excessive hydrogen chloride gas increases reaction rate, but also results in hydrogen chloride
Waste is serious, is unfavorable for economizing on resources, while hydrogen chloride is discharged in air can cause environmental pollution.
Utility model content
The purpose of this utility model is that solves above-mentioned deficiency in the prior art, it is proposed that a kind of utilization rate is more
High while and energy-saving and environment-friendly tail gas absorbing system.
The utility model is realized using following technical solution：A kind of tail gas absorption system of epoxychloropropane chlorination workshop section
System including chlorinating container and water absorption tower, further includes glycerine absorption tower and alkali adsorption tower, and the chlorinating container is inhaled with glycerine
Receive tower connection, glycerine absorption tower upper end connection glycerine absorber cooler, lower end connection glycerine absorption cycle slot, glycerine absorption cycle
Slot is connected again with chlorinating container, so as to which chlorinating container and glycerine absorption tower form closed-loop system；Glycerine absorption tower also with water
Absorption tower connects, and water absorption tower is connected with alkali adsorption tower, alkali adsorption tower connection exhaust tube.
Distiller condenser and knockout drum, chlorinating container are additionally provided between the chlorinating container and glycerine absorption tower
Distiller condenser, distiller condenser connection knockout drum are connected, knockout drum is connected with glycerine absorption tower.
Water absorption tower lower end is connected with water absorption cycle slot, and water absorption cycle slot is connected with water absorber cooler, water
Absorber cooler connects water absorption tower upper end, forms closed-loop system.
The alkali adsorption tower lower end is connected with lye absorption cycle slot, and lye absorption cycle slot connects with Alkali absorption cooler
It connects, Alkali absorption cooler connection alkali adsorption tower upper end forms closed-loop system.
Exhaust fan is equipped between the alkali adsorption tower and exhaust tube, wind turbine is opened and tail gas is caused to be easier to discharge, more
Simply.
Compared with prior art, the beneficial effects of the utility model are：
The utility model proposes epoxychloropropane chlorination workshop section tail gas absorbing system, the absorption system is by chlorinating container
Unreacted hydrogen chloride recycles in the gas of interior discharge, has saved cost, has passed through simultaneously：Glycerine absorption+water absorption+alkali is inhaled
It receives links to handle the pernicious gas absorption in tail gas so that the gas of discharge more safety and environmental protection.
Description of the drawings
Fig. 1 is the mounting arrangements schematic diagram of the utility model structure；
Fig. 2 is the enlarged drawing of A in Fig. 1；
Fig. 3 is the enlarged drawing of B in Fig. 1；
Fig. 4 is the enlarged drawing of C in Fig. 1；
In figure：1st, chlorinating container, 2, condenser, 3, knockout drum, 4, glycerine absorption tower, 5, glycerine absorption cycle
Slot, 6, glycerine absorber cooler, 7, water absorption tower, 8, water absorption cycle slot, 9, water absorber cooler, 10, alkali adsorption tower, 11,
Lye absorption cycle slot, 12, Alkali absorption cooler, 13, wind turbine, 14, exhaust tube.
Specific embodiment
It is below in conjunction with the accompanying drawings and specific example, right to make the purpose of this utility model, technical solution and advantage clearer
The utility model further illustrates.
The purpose of this utility model is to provide a kind of cost-effective, the epoxychloropropane chlorination workshop section tail gas suction of energy-saving and emission-reduction
Knock off skill, i.e. glycerine absorption+water absorption+Alkali absorption.
Based on Literature Consult, HCl gases can be dissolved in glycerine, wherein HCl is in the solubility of pure glycerin at 20 DEG C
29g/100g glycerine is 24.62g/100g glycerine at 40 DEG C, is 19.96g/100g glycerine at 60 DEG C, and 80 DEG C of whens are 15.28g/
100g glycerine.Glycerine can direct cycle to the progress substitution reaction of chlorination workshop section after absorbing the hydrogen chloride in tail gas.This process energy
Consume small, economically feasible.
The chlorination workshop section of glycerine method epoxychloropropane is that substitution reaction occurs for glycerine and hydrogen chloride, generates dichlorohydrin, chlorine
Change excess hydrogen, so as to improve positive reaction rate, improve product yield.
Fixed gas after the gas phase of chlorination workshop section is condensed enters tail gas absorbing system, fixed gas be mainly HCl, H2O with
And DCH etc., wherein most are HCl gases.
Tail gas absorption workshop section includes glycerine absorption tower, water absorption tower and alkali adsorption tower.Fixed gas initially enters glycerine absorption
Tower, glycerine squeeze into tower top by pumping, and hydrogen chloride enters from bottom of towe, and glycerine and hydrogen chloride counter current contacting in tower carry out mass-and heat-transfer.
Glycerine rich in HCl is flowed out from bottom of towe, is directly squeezed by pump in chlorinating container, carries out chlorination reaction.Tower top is unabsorbed
Hydrogen chloride then sequentially enters high altitude discharge after water absorption, the interior absorption of alkali adsorption tower.Such technique improves the conversion ratio of hydrogen chloride,
Consumption is small, less than 0.9t/tECH.
Specific implementation step is as follows：
As shown in Figs 1-4, glycerine and hydrogen chloride enter chlorinating container 1, and the gas phase of chlorination workshop section enters condenser 2, warp
Into knockout drum 3 after condensation, fixed gas enters tail gas absorbing system, and fixed gas is mainly HCl, H2O and DCH etc.,
Middle major part is HCl gases.
Tail gas absorption workshop section includes glycerine absorption tower 4, water absorption tower 7 and alkali adsorption tower 10.Fixed gas initially enters glycerine
Absorption tower, the glycerine of glycerine tank squeeze into tower top by pumping, and fixed gas enters from bottom of towe, glycerine and hydrogen chloride counter current contacting in tower,
Carry out mass-and heat-transfer.Glycerine rich in HCl flows out to glycerine absorption cycle slot 5 from bottom of towe, and the gas after reaction is inhaled by glycerine
6 further cyclic absorption of condenser is received, the glycerine of hydrogen chloride is absorbed into glycerine tank at the beginning, is directly squeezed by pump
In chlorinating container, chlorination reaction is carried out, realizes and recycles.Glycerine absorbs the unabsorbed tail gas of tower top and then sequentially enters water
Absorption tower；The same principle in water absorption tower after tail gas enters water absorption system, is cooled down by water absorber cooler 9, liquid into
Enter water absorption cycle slot 8, residual gas enters down one of alkali adsorption tower；By Alkali absorption cooler 12, condensed liquid
Into lye absorption cycle slot 11, residual gas finally enters exhaust fan 13, most afterwards through 14 high altitude discharge of exhaust tube.
Claims (5)
1. a kind of epoxychloropropane chlorination workshop section tail gas absorbing system, special including chlorinating container (1) and water absorption tower (7)
Sign is：Glycerine absorption tower (4) and alkali adsorption tower (10) are further included, the chlorinating container (1) connects with glycerine absorption tower (4)
It connects, glycerine absorption tower (4) upper end connection glycerine absorber cooler (6), lower end connection glycerine absorption cycle slot (5), glycerine absorbs
It circulating slot (5) and is connected with chlorinating container (1), so as to which chlorinating container (1) and glycerine absorption tower (4) form closed-loop system；
Glycerine absorption tower (4) is also connected with water absorption tower (7), and water absorption tower (7) are connected with alkali adsorption tower (10), and alkali adsorption tower (10) is even
Run in inflator (14).
2. epoxychloropropane chlorination workshop section tail gas absorbing system according to claim 1, it is characterised in that：The chlorination is anti-
It answers and distiller condenser (2) and knockout drum (3) is additionally provided between kettle (1) and glycerine absorption tower (4), chlorinating container (1) is even
Distiller condenser (2), distiller condenser (2) connection knockout drum (3) are connect, knockout drum (3) connects with glycerine absorption tower (4)
It connects.
3. epoxychloropropane chlorination workshop section tail gas absorbing system according to claim 1, it is characterised in that：The water absorbs
Tower (7) lower end is connected with water absorption cycle slot (8), and water absorption cycle slot (8) is connected with water absorber cooler (9), and water absorbs cold
But device (9) connection water absorption tower (7) upper end, forms closed-loop system.
4. epoxychloropropane chlorination workshop section tail gas absorbing system according to claim 1, it is characterised in that：The Alkali absorption
Tower (10) lower end is connected with lye absorption cycle slot (11), and lye absorption cycle slot (11) is connected with Alkali absorption cooler (12),
Alkali absorption cooler (12) connects alkali adsorption tower (10) upper end, forms closed-loop system.
5. epoxychloropropane chlorination workshop section tail gas absorbing system according to claim 1, it is characterised in that：The Alkali absorption
Exhaust fan (13) is equipped between tower (10) and exhaust tube (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721429291.1U CN207445913U (en) | 2017-10-31 | 2017-10-31 | Epoxychloropropane chlorination workshop section tail gas absorbing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721429291.1U CN207445913U (en) | 2017-10-31 | 2017-10-31 | Epoxychloropropane chlorination workshop section tail gas absorbing system |
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| CN207445913U true CN207445913U (en) | 2018-06-05 |
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ID=62252877
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| CN201721429291.1U Active CN207445913U (en) | 2017-10-31 | 2017-10-31 | Epoxychloropropane chlorination workshop section tail gas absorbing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529545A (en) * | 2018-12-12 | 2019-03-29 | 安徽金禾实业股份有限公司 | A kind of methyl acetoacetate exhaust gas treating method and device |
| CN112591712A (en) * | 2020-12-21 | 2021-04-02 | 中国天辰工程有限公司 | Device and method for recovering hydrogen chloride in tail gas of process for preparing epoxy chloropropane by glycerol method |
| CN115138185A (en) * | 2022-07-30 | 2022-10-04 | 武汉凯比思电力设备有限公司 | Device and method for treating and recycling waste gas in epichlorohydrin production process |
-
2017
- 2017-10-31 CN CN201721429291.1U patent/CN207445913U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529545A (en) * | 2018-12-12 | 2019-03-29 | 安徽金禾实业股份有限公司 | A kind of methyl acetoacetate exhaust gas treating method and device |
| CN112591712A (en) * | 2020-12-21 | 2021-04-02 | 中国天辰工程有限公司 | Device and method for recovering hydrogen chloride in tail gas of process for preparing epoxy chloropropane by glycerol method |
| CN115138185A (en) * | 2022-07-30 | 2022-10-04 | 武汉凯比思电力设备有限公司 | Device and method for treating and recycling waste gas in epichlorohydrin production process |
| CN115138185B (en) * | 2022-07-30 | 2023-12-05 | 武汉凯比思电力设备有限公司 | Device and method for treating and recycling waste gas in epichlorohydrin production process |
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