CN104275076A - Device and process applied to reinforced absorption of methyl iodide in acetic acid tail gas - Google Patents
Device and process applied to reinforced absorption of methyl iodide in acetic acid tail gas Download PDFInfo
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- CN104275076A CN104275076A CN201410470069.0A CN201410470069A CN104275076A CN 104275076 A CN104275076 A CN 104275076A CN 201410470069 A CN201410470069 A CN 201410470069A CN 104275076 A CN104275076 A CN 104275076A
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Abstract
The invention relates to a device and a process applied to reinforced absorption of methyl iodide in acetic acid tail gas. The device comprises two reinforced absorption devices, two stages of absorption liquid pumps, two stages of absorption liquid storage tanks, a demister and an absorption liquid cooler which are connected with one another in series, wherein a gas inlet of a first-stage reinforced absorption device is communicated with an acetic acid tail gas source; a gas outlet of the first-stage reinforced absorption device is communicated with a gas inlet of a second-stage reinforced absorption device; a liquid inlet is communicated with a second-stage absorption liquid storage tank by virtue of a first-stage absorption liquid pump; a liquid outlet is directly communicated with a first-stage absorption liquid storage tank; a gas outlet of the second-stage reinforced absorption device is communicated with an inlet of the demister; a liquid inlet is communicated with a liquid outlet of the absorption liquid cooler by virtue of a second-stage absorption liquid pump; the liquid outlet is directly communicated with a second-stage absorption liquid storage tank; a liquid discharging hole of the demister is communicated with the second-stage absorption liquid storage tank. The device is simple in structure, small in size, easy to operate, low in operation cost and high in production efficiency.
Description
Technical field
The invention belongs to energy-conserving and environment-protective technical field, be specifically related to a kind of device and the technique thereof of strengthening iodomethane in absorption acetate acid tail gas.
Background technology
Methanol carbonylation produce acetic acid, no matter adopt which kind of major catalyst, all to use iodomethane or other containing iodine compound as co-catalyst, stabilizing agent.The introducing of I, makes carbonylation more easily occur on the one hand, brings extreme difficulties but on the other hand the recycling of follow-up acetate acid tail gas.
Acetate acid tail gas has high pressure and low pressure two kinds of operating mode gases, the CO containing high level, and have very high recycling and be worth, to the acetic acid plant of a set of annual output acetic acid 100,000 tons, tail gas tolerance is about 1500 ~ 2000m
3/ h.Because the iodomethane in acetate acid tail gas not being dropped to atomic content, enterprise can only abandon the recycling to tail gas, sends into torch burning, cause significant wastage after iodomethane being removed to discharge standard.CO is the base stock of production of acetic acid, and a large amount of CO emptying burnings, both wasted the energy, and added production of acetic acid cost, pollute environment again.Contain the extremely strong iodomethane of microcorrosion in tail gas simultaneously, constrain most CO process for separating and purifying.Therefore the processing method of acetate acid tail gas, especially the removing sulfuldioxide of iodomethane in acetate acid tail gas, has become the technical problem that acetic acid industry is extremely paid close attention to.
Summary of the invention
For the problems referred to above, it is little that main purpose of the present invention is to provide a kind of volume of energy, and space availability ratio is high, a kind of of good absorbing effect strengthens the device and technique thereof that absorb iodomethane in acetate acid tail gas.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of device strengthening iodomethane in absorption acetate acid tail gas, described device comprises two strengthening absorption equipments, be respectively primary reinforcement absorption equipment and secondary reinforcement absorption equipment, two strengthening absorption equipments connect in a series arrangement, and described device also comprises first order absorption liquid pump, first order absorption liquid storage tank, secondary absorption liquid pump, secondary absorbing liquid storage tank, demister and absorbing liquid cooler.
The air inlet of primary reinforcement absorption equipment is originated with acetate acid tail gas and is communicated, the gas outlet of primary reinforcement absorption equipment communicates with the air inlet of secondary reinforcement absorption equipment, the inlet of primary reinforcement absorption equipment is communicated with secondary absorbing liquid storage tank by first order absorption liquid pump, and the liquid outlet of primary reinforcement absorption equipment directly communicates with first order absorption liquid storage tank.
The gas outlet of secondary reinforcement absorption equipment communicates with demister import, and the inlet of secondary reinforcement absorption equipment absorbs liquid pump by secondary and communicates with the liquid outlet of absorbing liquid cooler, and the liquid outlet of secondary reinforcement absorption equipment directly communicates with secondary absorbing liquid storage tank; The leakage fluid dram of demister communicates with secondary absorbing liquid storage tank.
In preferred specific embodiment of the present invention, the gas outlet of described primary reinforcement absorption equipment is connected with first order absorption liquid storage tank, and the gas outlet of secondary reinforcement absorption equipment is connected with secondary absorbing liquid storage tank.
In preferred specific embodiment of the present invention, described absorbing liquid cooler is adopt chilled water as the absorbing liquid cooler of frozen liq.
A kind of technique strengthening iodomethane in absorption acetate acid tail gas, after described technique comprises the steps: unlatching two strengthening absorption equipment, pass into acetate acid tail gas, simultaneously stability liquid sprays into secondary reinforcement absorption equipment after the cooling of absorbing liquid cooler, secondary reinforcement absorption is carried out with from primary reinforcement absorption equipment acetate acid tail gas out, tail gas after secondary reinforcement absorption equipment absorbs enters demister demist next treatment process laggard, and the absorbing liquid after secondary reinforcement absorption equipment absorbs directly enters secondary absorbing liquid storage tank; Demister bottom absorbing liquid out flows into secondary absorbing liquid storage tank; Absorbing liquid in secondary absorbing liquid storage tank sprays into primary reinforcement absorption equipment through first order absorption liquid pump, carry out contacting in primary reinforcement absorption equipment absorbing with acetate acid tail gas unstripped gas, acetate acid tail gas after absorption enters secondary reinforcement absorption equipment, and absorbing liquid enters first order absorption liquid storage tank and then enters subsequent processing or go regeneration of absorption solution system.
In preferred specific embodiment of the present invention, absorbing liquid is contribute to absorbing the acetic acid of iodomethane, aceticanhydride or methyl alcohol.
In preferred specific embodiment of the present invention, the rotating speed of two strengthening absorption equipments is 50-2000r/min.
In preferred specific embodiment of the present invention, the rotating speed of two strengthening absorption equipments is 150-1500r/min.
In preferred specific embodiment of the present invention, the volume flow ratio of acetate acid tail gas and absorbing liquid is 50-400:1.
In preferred specific embodiment of the present invention, the volume flow ratio of acetate acid tail gas and absorbing liquid is 100-300:1.
Positive progressive effect of the present invention is: adopt device gas-liquid mass transfer efficiency of the present invention high, renewal speed is fast, structure is simple, volume of the present invention is little, easy to operate, the invention solves that equipment volume is huge, space availability ratio is low, assimilation effect is poor and be difficult to iodomethane in tail gas to absorb the technical problem that the existing acetate acid tail gas iodomethane absorption techniques such as super low loading exist, make whole explained hereafter safety and stability reliable, operating cost reduces greatly, improves production efficiency simultaneously.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Detailed description of the invention
Present pre-ferred embodiments is provided, to describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is overall structure schematic diagram of the present invention, as shown in Figure 1: the present invention includes two strengthening absorption equipments, be respectively primary reinforcement absorption equipment 1 and secondary reinforcement absorption equipment 4, two strengthening absorption equipments connect in a series arrangement, and the present invention also comprises first order absorption liquid pump 2, first order absorption liquid storage tank 3, secondary absorption liquid pump 5, secondary absorbing liquid storage tank 6, demister 7 and absorbing liquid cooler 8.
The air inlet 9 of primary reinforcement absorption equipment 1 is originated with acetate acid tail gas and is communicated, the gas outlet 10 of primary reinforcement absorption equipment 1 communicates with the air inlet 13 of secondary reinforcement absorption equipment 4, the inlet 11 of primary reinforcement absorption equipment 1 is communicated with secondary absorbing liquid storage tank 6 by first order absorption liquid pump 2, and the liquid outlet 12 of primary reinforcement absorption equipment 1 directly communicates with first order absorption liquid storage tank 3.
The air inlet 13 of secondary reinforcement absorption equipment 4 communicates with the gas outlet 10 of primary reinforcement absorption equipment 1, secondary reinforcement absorption equipment 4 gas outlet 14 communicates with demister 7 import, the inlet 15 of secondary reinforcement absorption equipment 4 absorbs liquid pump 5 by secondary and communicates with the liquid outlet of absorbing liquid cooler 8, and the liquid outlet 16 of secondary reinforcement absorption equipment 4 directly communicates with secondary absorbing liquid storage tank 6; The leakage fluid dram of demister 7 communicates with secondary absorbing liquid storage tank 6.
As shown in Figure 1: absorbing liquid cooler 8 is adopt chilled water as the absorbing liquid cooler of frozen liq.
The gas outlet 10 of primary reinforcement absorption equipment 1 is connected with first order absorption liquid storage tank 3, and the gas outlet 14 of secondary reinforcement absorption equipment 4 is connected with secondary absorbing liquid storage tank 6.
The course of work of the present invention is as follows: after opening two strengthening absorption equipments, pass into acetate acid tail gas, simultaneously stability liquid sprays in secondary reinforcement absorption equipment 4 after absorbing liquid cooler 8 is lowered the temperature, secondary reinforcement absorption is carried out with from primary reinforcement absorption equipment 1 acetate acid tail gas out, tail gas after secondary reinforcement absorption equipment 4 absorbs enters demister 7 demist next treatment process laggard, and the absorbing liquid after secondary reinforcement absorption equipment 4 absorbs directly enters secondary absorbing liquid storage tank 6; Bottom demister 7, absorbing liquid out flows into secondary absorbing liquid storage tank 6; Absorbing liquid in secondary absorbing liquid storage tank 6 sprays into primary reinforcement absorption equipment 1 through first order absorption liquid pump 2, carry out contacting in primary reinforcement absorption equipment 1 absorbing with acetate acid tail gas unstripped gas, acetate acid tail gas after absorption enters secondary reinforcement absorption equipment 4, and absorbing liquid enters first order absorption liquid storage tank 3 and then enters subsequent processing or go regeneration of absorption solution system.
In above work process, absorbing liquid is contribute to absorbing the acetic acid of iodomethane, aceticanhydride or methyl alcohol.
The rotating speed of strengthening absorption equipment is 50-2000r/min, and preferably, rotating speed is 150-1500r/min.
The volume flow ratio of acetate acid tail gas and every grade of absorbing liquid is 50-400:1, and preferably, the volume flow ratio of acetate acid tail gas and every grade of absorbing liquid is 100-300:1.
Below specifically examples of implementation:
Start two strengthening absorption equipments, regulate two equipment rotating speeds to 600r/min, after stablizing 5min, opening secondary absorption liquid pump 5 and controlling flow is 1m
3opening first order absorption liquid pump 2 after/h, 10min and controlling flow is 1m
3/ h, passes into acetate acid tail gas, and exhaust flow is 200Nm
3/ h; After stable system 30min, recording primary reinforcement absorption equipment import department acetate acid tail gas iodomethane concentration is 65ppb, and secondary reinforcement absorption equipment exit tail gas iodomethane concentration is 1.2ppb.
Under the above operations, two strengthening absorption equipments in rotary packed bed rotational speed regulation be 800r/min, other conditions are constant, after stable system 30min, recording primary reinforcement absorption equipment import department acetate acid tail gas iodomethane concentration is 68ppb, and secondary reinforcement absorption equipment exit tail gas iodomethane concentration is 1.1ppb.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. strengthen the device absorbing iodomethane in acetate acid tail gas for one kind, it is characterized in that: described device comprises two strengthening absorption equipments, be respectively primary reinforcement absorption equipment and secondary reinforcement absorption equipment, two strengthening absorption equipments connect in a series arrangement, and described device also comprises first order absorption liquid pump, first order absorption liquid storage tank, secondary absorption liquid pump, secondary absorbing liquid storage tank, demister and absorbing liquid cooler;
The air inlet of primary reinforcement absorption equipment is originated with acetate acid tail gas and is communicated, the gas outlet of primary reinforcement absorption equipment communicates with the air inlet of secondary reinforcement absorption equipment, the inlet of primary reinforcement absorption equipment is communicated with secondary absorbing liquid storage tank by first order absorption liquid pump, and the liquid outlet of primary reinforcement absorption equipment directly communicates with first order absorption liquid storage tank;
The gas outlet of secondary reinforcement absorption equipment communicates with demister import, and the inlet of secondary reinforcement absorption equipment absorbs liquid pump by secondary and communicates with the liquid outlet of absorbing liquid cooler, and the liquid outlet of secondary reinforcement absorption equipment directly communicates with secondary absorbing liquid storage tank; The leakage fluid dram of demister communicates with secondary absorbing liquid storage tank.
2. strengthening according to claim 1 absorbs the device of iodomethane in acetate acid tail gas, it is characterized in that: the gas outlet of described primary reinforcement absorption equipment is connected with first order absorption liquid storage tank, the gas outlet of secondary reinforcement absorption equipment is connected with secondary absorbing liquid storage tank.
3. strengthening according to claim 1 absorbs the device of iodomethane in acetate acid tail gas, it is characterized in that: described absorbing liquid cooler is adopt chilled water as the absorbing liquid cooler of frozen liq.
4. strengthen the technique absorbing iodomethane in acetate acid tail gas for one kind, it is characterized in that: after described technique comprises the steps: unlatching two strengthening absorption equipment, pass into acetate acid tail gas, simultaneously stability liquid sprays into secondary reinforcement absorption equipment after the cooling of absorbing liquid cooler, secondary reinforcement absorption is carried out with from primary reinforcement absorption equipment acetate acid tail gas out, tail gas after secondary reinforcement absorption equipment absorbs enters demister demist next treatment process laggard, and the absorbing liquid after secondary reinforcement absorption equipment absorbs directly enters secondary absorbing liquid storage tank; Demister bottom absorbing liquid out flows into secondary absorbing liquid storage tank; Absorbing liquid in secondary absorbing liquid storage tank sprays into primary reinforcement absorption equipment through first order absorption liquid pump, carry out contacting in primary reinforcement absorption equipment absorbing with acetate acid tail gas unstripped gas, acetate acid tail gas after absorption enters secondary reinforcement absorption equipment, and absorbing liquid enters first order absorption liquid storage tank and then enters subsequent processing or go regeneration of absorption solution system.
5. strengthening according to claim 4 absorbs the technique of iodomethane in acetate acid tail gas, it is characterized in that: absorbing liquid is contribute to absorbing the acetic acid of iodomethane, aceticanhydride or methyl alcohol.
6. strengthening according to claim 4 absorbs the technique of iodomethane in acetate acid tail gas, it is characterized in that: the rotating speed of two strengthening absorption equipments is 50-2000r/min.
7. strengthening according to claim 6 absorbs the technique of iodomethane in acetate acid tail gas, it is characterized in that: the rotating speed of two strengthening absorption equipments is 150-1500r/min.
8. strengthening according to claim 4 absorbs the technique of iodomethane in acetate acid tail gas, it is characterized in that: the volume flow ratio of acetate acid tail gas and absorbing liquid is 50-400:1.
9. strengthening according to claim 8 absorbs the technique of iodomethane in acetate acid tail gas, it is characterized in that: the volume flow ratio of acetate acid tail gas and absorbing liquid is 100-300:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410470069.0A CN104275076A (en) | 2014-09-16 | 2014-09-16 | Device and process applied to reinforced absorption of methyl iodide in acetic acid tail gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410470069.0A CN104275076A (en) | 2014-09-16 | 2014-09-16 | Device and process applied to reinforced absorption of methyl iodide in acetic acid tail gas |
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| CN104275076A true CN104275076A (en) | 2015-01-14 |
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| CN201410470069.0A Pending CN104275076A (en) | 2014-09-16 | 2014-09-16 | Device and process applied to reinforced absorption of methyl iodide in acetic acid tail gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114512254A (en) * | 2022-01-27 | 2022-05-17 | 中国原子能科学研究院 | Method for trapping gaseous iodine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4045539A (en) * | 1974-02-01 | 1977-08-30 | Hitachi, Ltd. | Process for decontaminating gas containing radioactive iodine |
| CN102380290A (en) * | 2011-12-09 | 2012-03-21 | 上海安赐机械设备有限公司 | Device capable of enhancing absorption of methyl iodide in acetic acid tail gas and technology adopting same |
| CN103768910A (en) * | 2014-01-16 | 2014-05-07 | 昆明理工大学 | Synergetic purification method and device for SO2 and heavy metals in smelting flue gas |
| CN103936549A (en) * | 2014-03-07 | 2014-07-23 | 中石化上海工程有限公司 | Recover method for useful tail gas components in acetic acid apparatus |
| CN204170587U (en) * | 2014-09-16 | 2015-02-25 | 上海安赐机械设备有限公司 | A kind of device strengthening iodomethane in absorption acetate acid tail gas |
-
2014
- 2014-09-16 CN CN201410470069.0A patent/CN104275076A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4045539A (en) * | 1974-02-01 | 1977-08-30 | Hitachi, Ltd. | Process for decontaminating gas containing radioactive iodine |
| CN102380290A (en) * | 2011-12-09 | 2012-03-21 | 上海安赐机械设备有限公司 | Device capable of enhancing absorption of methyl iodide in acetic acid tail gas and technology adopting same |
| CN103768910A (en) * | 2014-01-16 | 2014-05-07 | 昆明理工大学 | Synergetic purification method and device for SO2 and heavy metals in smelting flue gas |
| CN103936549A (en) * | 2014-03-07 | 2014-07-23 | 中石化上海工程有限公司 | Recover method for useful tail gas components in acetic acid apparatus |
| CN204170587U (en) * | 2014-09-16 | 2015-02-25 | 上海安赐机械设备有限公司 | A kind of device strengthening iodomethane in absorption acetate acid tail gas |
Non-Patent Citations (1)
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| 李智等: "醋酸生产中2种尾气吸收装置的性能评价", 《中氮肥》, no. 2, 31 March 2011 (2011-03-31), pages 1 - 4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114512254A (en) * | 2022-01-27 | 2022-05-17 | 中国原子能科学研究院 | Method for trapping gaseous iodine |
| CN114512254B (en) * | 2022-01-27 | 2024-02-20 | 中国原子能科学研究院 | Method for trapping gaseous iodine |
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Address after: 201201 Shanghai, Pudong New Area Jin Tang Road, No. 2, block B, 145 Applicant after: SHANGHAI ANHORN ENVIRONMENTAL TECHNOLOGY CO., LTD. Address before: 201201 Shanghai, Pudong New Area Jin Tang Road, No. 2, block B, 145 Applicant before: Shanghai Anhorn Mechanical Equipment Co., Ltd. |
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