CN104138703B - Between/paraphthaloyl chloride produce in waste gas treatment process and device - Google Patents
Between/paraphthaloyl chloride produce in waste gas treatment process and device Download PDFInfo
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- CN104138703B CN104138703B CN201410382155.6A CN201410382155A CN104138703B CN 104138703 B CN104138703 B CN 104138703B CN 201410382155 A CN201410382155 A CN 201410382155A CN 104138703 B CN104138703 B CN 104138703B
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Abstract
To the present invention relates between one/paraphthaloyl chloride produce in waste gas treatment process and device, belong to waste gas pollution control and treatment technical field.Waste gas treatment process in the production of of the present invention/paraphthaloyl chloride, be to adopt between thionyl chloride preparation/course of reaction of paraphthaloyl chloride in the sulfur dioxide, the hydrogen chloride emission that produce absorb through absorption tower, then drying tower, pressue device are recycled; The waste gas that feeding stage, thionyl chloride reclaim stage of rectification generation enters Alkali absorption tower, then the solution after absorbing is delivered to absorption plant, and release sulfur dioxide gas reclaims again.Of the present invention/paraphthaloyl chloride produce in waste gas treatment process, not only decrease the discharge of waste gas, achieve recycling of sulfur dioxide, and the further utilization rate improving sulfur dioxide; Present invention also offers a kind of easy and simple to handle between/paraphthaloyl chloride produce in emission-control equipment.
Description
Technical field
To the present invention relates between one/paraphthaloyl chloride produce in waste gas treatment process and device, belong to waste gas pollution control and treatment technical field.
Background technology
At present, between preparation/course of reaction of paraphthaloyl chloride in produce most of sulfur dioxide, hydrogen chloride mix waste gas after treatment, hydrogen chloride becomes hydrochloric acid, and sulfur dioxide alkaline medium absorbs, produce a large amount of sulfite solution and be difficult to process, bring very large pressure to environmental protection; Even if part producing unit utilizes sulfur dioxide recovery, also be only limitted to between preparation/course of reaction of paraphthaloyl chloride in the higher waste gas of the content of sulfur dioxide that produces reclaim, and have ignored the process of the less waste gas of content of sulfur dioxide, the rate of recovery of sulfur dioxide only has about 80%.
In prior art, process a small amount of waste gas that the stage such as feeding stage, raw materials recovery produces, cost of investment is higher, and the sulfur dioxide gas rate of recovery is very low.Therefore be badly in need of exploring new waste gas treatment process.
Summary of the invention
To the object of this invention is to provide between one/paraphthaloyl chloride produce in waste gas treatment process, it not only decreases the discharge of waste gas, achieves recycling of sulfur dioxide, and the further utilization rate improving sulfur dioxide; Present invention also offers a kind of easy and simple to handle between/paraphthaloyl chloride produce in emission-control equipment.
Waste gas treatment process in the production of of the present invention/paraphthaloyl chloride, it is characterized in that: to adopt between thionyl chloride preparation/course of reaction of paraphthaloyl chloride in the sulfur dioxide, the hydrogen chloride emission that produce absorb through absorption tower, then drying tower, pressue device are recycled; The waste gas that feeding stage, thionyl chloride reclaim stage of rectification generation enters Alkali absorption tower, then the solution after absorbing is delivered to absorption plant, and release sulfur dioxide gas reclaims again.
Described absorption tower is two to level Four, and absorbing medium is water.
The drying medium of described drying tower to be mass concentration be 98% the concentrated sulfuric acid.
The absorbing medium of described Alkali absorption tower is sodium hydroxide solution or potassium hydroxide solution.
The absorption plant that solution after described Alkali absorption tower absorbs is delivered to is arbitrary grade of hydrogen chloride absorption tank.
Described gas enters absorption tower, Alkali absorption tower or drying tower and adopts the mode of giving vent to anger at the bottom of tower top air inlet tower, or adopts the mode that at the bottom of tower, air inlet tower top is given vent to anger.
Hydrochloric acid mass concentration in described first grade absorption tower is 20% ~ 40%.
Waste gas treatment process in the production of of the present invention/paraphthaloyl chloride, comprises the following steps:
To adopt between thionyl chloride preparation/course of reaction of paraphthaloyl chloride in produce sulfur dioxide, hydrogen chloride emission is after absorption tower absorbs, hydrogen chloride is wherein become by-product hydrochloric acid, wherein moisture removed by residue sulfur dioxide gas drying tower, deliver to thionyl chloride process units through sulfur dioxide pressue device again to recycle, the absorbing medium that absorption plant at different levels squeezes into top, absorption tower by pump respectively absorbs waste gas; A small amount of waste gas that feeding stage, thionyl chloride reclaim stage of rectification generation directly enters Alkali absorption tower, sodium sulfite and solution of sodium bisulfite is generated through alkali liquor absorption, then by pump, solution is delivered to arbitrary grade of hydrogen chloride absorption device, discharge wherein sulfur dioxide gas recycling further.
The device of exhaust-gas treatment in the production of of the present invention/paraphthaloyl chloride, comprise absorption tower, drying tower, pressue device, tourie, pump, wherein first grade absorption tower is connected successively with first order absorption tank, two-level absorption tower, secondary tourie, three grades of absorption towers, three grades of touries, level Four absorption tower, level Four tourie, drying tower, dry tourie, pressue devices, be connected by pump its corresponding absorption tower tower top bottom tourie at different levels, be connected with drying tower tower top by pump bottom dry tourie; Alkali absorption tower bottom is connected with Alkali absorption tank top, and Alkali absorption column overhead is connected with Alkali absorption pot bottom by pump, and Alkali absorption pot bottom is connected with arbitrary grade of tourie by pump.
Upper and lower, absorption tower arranges gas feed respectively.
Alkali absorption tower upper and lower arranges gas feed respectively.
Drying tower upper and lower arranges gas feed respectively.
The present invention has following beneficial effect:
(1) waste gas treatment process in the present invention relies on sulfur dioxide gas phase legal system to get thionyl chloride technology, between employing thionyl chloride legal system is standby/paraphthaloyl chloride, the hydrogen chloride produced in whole production process, SO 2 tail gas through absorbing, dry, pressurization is converted into concentrated hydrochloric acid and pure sulfur dioxide gas recycled is produced in returning thionyl chloride, while reducing toxic emission, achieve recycling of sulfur dioxide;
(2) in waste gas treatment process of the present invention, exhausted air quantity directly adopts alkaline medium to absorb when producing less fixing, this part alkaline medium directly can be used from certain grade of absorption process of hydrogen chloride as absorbing medium and water one, decrease the output of by-product hydrochloric acid and sulfite solution, the simultaneously further utilization rate improving sulfur dioxide;
(3) emission-control equipment in the present invention, effective to exhaust-gas treatment, and also easy to operate.
Accompanying drawing explanation
Fig. 1 be between/paraphthaloyl chloride produce in emission-control equipment structural representation;
In figure: 1, feeding stage, thionyl chloride reclaim a small amount of waste gas that stage of rectification produces; 2, Alkali absorption tower; 3, to adopt between thionyl chloride preparation/course of reaction of paraphthaloyl chloride in the large quantity of exhaust gas that produces; 4, first grade absorption tower; 5, two-level absorption tower; 6, three grades of absorption towers; 7, level Four absorption tower; 8, drying tower; 9, pressue device; 10, protochloride maple preparation facilities; 11, dry tourie; 12, level Four tourie; 13, three grades of touries; 14, pump; 15, secondary tourie; 16, first order absorption tank; 17, Alkali absorption tank.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated, but it does not limit enforcement of the present invention.
As shown in Figure 1, between/paraphthaloyl chloride produce in exhaust-gas treatment device used, comprise absorption tower, drying tower 8, pressue device 9, tourie, pump 14, it is characterized in that: first grade absorption tower 4 and first order absorption tank 16, two-level absorption tower 5, secondary tourie 15, three grades of absorption towers 6, three grades of touries 13, level Four absorption tower 7, level Four tourie 12, drying tower 8, dry tourie 11, pressue device 9 is connected successively, be connected by pump 14 its corresponding absorption tower tower top bottom tourie at different levels, be connected with drying tower 8 tower top by pump 14 bottom dry tourie 11, be connected with Alkali absorption tank 17 top bottom Alkali absorption tower 2, Alkali absorption tower 2 tower top is connected with bottom Alkali absorption tank 17 by pump, is connected bottom Alkali absorption tank 17 by pump 14 with arbitrary grade of tourie.
Upper and lower, absorption tower arranges gas feed respectively.
Alkali absorption tower 2 upper and lower arranges gas feed respectively.
Drying tower 8 upper and lower arranges gas feed respectively.
Embodiment 1
To adopt between thionyl chloride preparation/course of reaction of paraphthaloyl chloride in the sulfur dioxide that produces, hydrogen chloride emission 3 enters first grade absorption tower 4 top, unabsorbed waste gas enters two-level absorption tower 5 top through first order absorption tank 16 top, remainder of exhaust gas enters top, three grades of absorption towers 6 through secondary tourie 15 top, top, level Four absorption tower 7 is entered again through three grades of tourie 13 tops, after level Four absorbs, remaining sulfur dioxide gas enters drying tower 8 top through level Four tourie 12 top, dried sulfur dioxide gas enters sulfur dioxide pressue device 9 by dry tourie 11 top, sulfur dioxide gas after pressurization is delivered to thionyl chloride preparation facilities 10 and utilizes, absorption plant at different levels squeezes into the liquid of respective absorption top of tower to sulfur dioxide by pump 14 respectively, chlorine hydride mixed gas body absorbs, the concentrated sulfuric acid in drying chamber 11 is squeezed into drying tower 8 top by pump 14 and is carried out drying to sulfur dioxide by drying tower 8, a small amount of waste gas 1 that feeding stage, thionyl chloride reclaim stage of rectification generation enters Alkali absorption tower 2 top, the sodium hydroxide solution being squeezed into Alkali absorption tower 2 top by pump 14 is carried out absorption to waste gas and produces sodium sulfite, solution of sodium bisulfite, squeeze in three grade touries 13 by pump 14 by solution when Alkali absorption tank 17 liquid level reaches 80%, release sulfur dioxide gas is wherein recycled.
Embodiment 2
The present embodiment is identical with the apparatus structure of embodiment 1, and difference is, enter absorption tower, drying tower, Alkali absorption tower gas phase all adopt air inlet at the bottom of tower, the mode that tower top is given vent to anger absorbs.
Embodiment 3
The present embodiment is identical with the apparatus structure of embodiment 1, the gas phase entering drying tower adopts tower top air inlet, and the mode of giving vent to anger at the bottom of tower absorbs, and difference is, the gas phase entering absorption tower and Alkali absorption tower all adopts air inlet at the bottom of tower, and the mode that tower top is given vent to anger absorbs.
Embodiment 4
The present embodiment is identical with the apparatus structure of embodiment 1, and difference is, what adopt in Alkali absorption device is that potassium hydroxide solution absorbs a small amount of sulfur dioxide gas.
Embodiment 5
The present embodiment is identical with the apparatus structure of embodiment 1, and difference is, what adopt in Alkali absorption device is that ammoniacal liquor absorbs a small amount of sulfur dioxide gas.
Embodiment 6
To adopt between thionyl chloride preparation/course of reaction of paraphthaloyl chloride in the sulfur dioxide that produces, hydrogen chloride emission 3 enters first grade absorption tower 4 top, unabsorbed waste gas enters two-level absorption tower 5 top through first order absorption tank 16 top, remainder of exhaust gas enters top, three grades of absorption towers 6 through secondary tourie 15 top, after three grades absorb, remaining sulfur dioxide gas enters drying tower 8 top through three grades of tourie 13 tops, dried sulfur dioxide gas enters sulfur dioxide pressue device 9 by dry tourie 11 top, sulfur dioxide gas after pressurization is delivered to thionyl chloride preparation facilities 10 and utilizes, absorption plant at different levels squeezes into the liquid of respective absorption top of tower to sulfur dioxide by pump 14 respectively, chlorine hydride mixed gas body absorbs, the concentrated sulfuric acid in drying chamber 11 is squeezed into drying tower 8 top by pump 14 and is carried out drying to sulfur dioxide by drying tower 8, a small amount of waste gas 1 that feeding stage, thionyl chloride reclaim stage of rectification generation enters Alkali absorption tower 2 top, the sodium hydroxide solution being squeezed into Alkali absorption tower 2 top by pump 14 is carried out absorption to waste gas and produces sodium sulfite, solution of sodium bisulfite, squeeze in three grade touries 13 by pump 14 by solution when Alkali absorption tank 17 liquid level reaches 80%, release sulfur dioxide gas is wherein recycled.
Embodiment 7
To adopt between thionyl chloride preparation/course of reaction of paraphthaloyl chloride in the sulfur dioxide that produces, hydrogen chloride emission 3 enters first grade absorption tower 4 top, unabsorbed waste gas enters two-level absorption tower 5 top through first order absorption tank 16 top, after secondary absorbs, remaining sulfur dioxide gas enters drying tower 8 top through secondary tourie 15 top, dried sulfur dioxide gas enters sulfur dioxide pressue device 9 by dry tourie 11 top, sulfur dioxide gas after pressurization is delivered to thionyl chloride preparation facilities 10 and utilizes, absorption plant at different levels squeezes into the liquid of respective absorption top of tower to sulfur dioxide by pump 14 respectively, chlorine hydride mixed gas body absorbs, the concentrated sulfuric acid in drying chamber 11 is squeezed into drying tower 8 top by pump 14 and is carried out drying to sulfur dioxide by drying tower 8, a small amount of waste gas 1 that feeding stage, thionyl chloride reclaim stage of rectification generation enters Alkali absorption tower 2 top, the sodium hydroxide solution being squeezed into Alkali absorption tower 2 top by pump 14 is carried out absorption to waste gas and produces sodium sulfite, solution of sodium bisulfite, squeeze in secondary tourie 15 by pump 14 by solution when Alkali absorption tank 17 liquid level reaches 80%, release sulfur dioxide gas is wherein recycled.
Claims (9)
1. between one kind/paraphthaloyl chloride produce in waste gas treatment process, it is characterized in that: to adopt between thionyl chloride preparation/course of reaction of paraphthaloyl chloride in the sulfur dioxide, the absorbing medium water of hydrogen chloride emission (3) in absorption tower that produce absorb, then drying tower (8), pressue device (9) are recycled; The waste gas (1) that feeding stage, thionyl chloride reclaim stage of rectification generation enters Alkali absorption tower (2), then the solution after absorbing is delivered to arbitrary grade of hydrogen chloride absorption tank, and release sulfur dioxide gas reclaims again.
2. according to claim 1/paraphthaloyl chloride produce in waste gas treatment process, it is characterized in that: absorption tower is two to level Four.
3. according to claim 1/paraphthaloyl chloride produce in waste gas treatment process, it is characterized in that: the drying medium of drying tower (8) to be mass concentration be 98% the concentrated sulfuric acid.
4. waste gas treatment process in the production of according to claim 1/paraphthaloyl chloride, is characterized in that: the absorbing medium of Alkali absorption tower (2) is sodium hydroxide solution, potassium hydroxide solution or ammoniacal liquor.
5. waste gas treatment process in the production of according to claim 1/paraphthaloyl chloride, it is characterized in that: gas enters absorption tower, Alkali absorption tower (2) or drying tower (8) and adopts the mode of giving vent to anger at the bottom of tower top air inlet tower, or adopts the mode that at the bottom of tower, air inlet tower top is given vent to anger.
6. the device that in an according to claim 1/paraphthaloyl chloride production, waste gas treatment process is used, comprise absorption tower, drying tower (8), pressue device (9), tourie, pump (14), it is characterized in that: first grade absorption tower (4) and first order absorption tank (16), two-level absorption tower (5), secondary tourie (15), three grades of absorption towers (6), three grades of touries (13), level Four absorption tower (7), level Four tourie (12), drying tower (8), dry tourie (11), pressue device (9) is connected successively, be connected by pump (14) its corresponding absorption tower tower top bottom tourie at different levels, dry tourie (11) bottom is connected with drying tower (8) tower top by pump (14), Alkali absorption tower (2) bottom is connected with Alkali absorption tank (17) top, Alkali absorption tower (2) tower top is connected with Alkali absorption tank (17) bottom by pump, and Alkali absorption tank (17) bottom is connected with arbitrary grade of tourie by pump (14).
7. the device that in the production of according to claim 6/paraphthaloyl chloride, waste gas treatment process is used, is characterized in that: upper and lower, absorption tower arranges gas feed respectively.
8. the device that in the production of according to claim 6/paraphthaloyl chloride, waste gas treatment process is used, is characterized in that: Alkali absorption tower (2) upper and lower arranges gas feed respectively.
9. the device that in the production of according to claim 6/paraphthaloyl chloride, waste gas treatment process is used, is characterized in that: drying tower (8) upper and lower arranges gas feed respectively.
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| CN201410382155.6A CN104138703B (en) | 2014-08-06 | 2014-08-06 | Between/paraphthaloyl chloride produce in waste gas treatment process and device |
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| CN201410382155.6A CN104138703B (en) | 2014-08-06 | 2014-08-06 | Between/paraphthaloyl chloride produce in waste gas treatment process and device |
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| CN104138703B true CN104138703B (en) | 2016-01-20 |
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Families Citing this family (5)
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| CN107983098A (en) * | 2017-12-25 | 2018-05-04 | 韩廷刚 | A kind of tail gas absorption processing unit |
| CN109368601B (en) * | 2018-11-23 | 2023-08-01 | 山东凯盛新材料股份有限公司 | Device and method for producing chlorosulfonic acid from m/p-phthaloyl chloride tail gas |
| CN110180364A (en) * | 2019-06-28 | 2019-08-30 | 金川集团股份有限公司 | A kind of device and its application method adjusting titanium tetrachloride reservoir pressure |
| CN111004138A (en) * | 2019-12-12 | 2020-04-14 | 南京恒道医药科技有限公司 | Green production method and device of levetiracetam key intermediate S-2-methyl aminobutyric acid |
| CN112933880A (en) * | 2021-02-04 | 2021-06-11 | 济源市恒通高新材料有限公司 | Sulfur dioxide recovery process and device for terephthaloyl chloride production tail gas |
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Inventor after: Zhang Shanmin Inventor after: Xie Shengbin Inventor after: Bi Yixia Inventor after: Li Guanghui Inventor after: Wang Ronghai Inventor after: Zhang Taiming Inventor after: Wang Zhiliang Inventor after: Zhang Qingxin Inventor before: Zhang Shanmin Inventor before: Xie Shengbin Inventor before: Bi Yixia Inventor before: Yan Beibei Inventor before: Wang Ronghai Inventor before: Zhang Taiming Inventor before: Wang Zhiliang Inventor before: Zhang Qingxin |
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Address after: Double Yang Zichuan District 255190 Shandong city of Zibo Province Patentee after: Shandong Kaisheng New Materials Co.,Ltd. Address before: Double Yang Zichuan District 255190 Shandong city of Zibo Province Patentee before: SHANDONG KAISHENG NEW MATERIALS CO., LTD. |