CN201658932U - Rectisol device - Google Patents
Rectisol device Download PDFInfo
- Publication number
- CN201658932U CN201658932U CN2010201531382U CN201020153138U CN201658932U CN 201658932 U CN201658932 U CN 201658932U CN 2010201531382 U CN2010201531382 U CN 2010201531382U CN 201020153138 U CN201020153138 U CN 201020153138U CN 201658932 U CN201658932 U CN 201658932U
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- raw gas
- methanol
- gas
- methanol solution
- heat exchanger
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Abstract
The utility model provides a rectisol device, which comprises a second spraying device, a first heat exchanger and a first spraying device, wherein the second spraying device is used for spraying methanol solution into raw gas; the first heat exchanger is used for cooling the raw gas in which the methanol solution is sprayed; and the first spraying device is used for spraying the methanol solution into the cooled raw gas again. In the rectisol device, a spraying device of the methanol solution is added before cooling the raw gas and the methanol solution is sprayed into the raw gas, so that the methanol is atomized and infused into a gas phase, the freezing point of the raw gas is reduced, water contained in the raw gas during secondary cooling is not easy to condense, the phenomenon that a pipe bundle is blocked in the heat exchanger can be avoided and the yield of gas cannot be reduced.
Description
Technical field
The utility model relates to the gas purification technique field, is specifically related to use low-temp methanol as absorbent, removes the device of sour gas in the coal gas.
Background technology
Because sour gas can solidify in the unstrpped gas cooling procedure, the disabling facility pipeline, catalyst is poisoned, can reduce calorific value of fuel gas or make the gas course of conveying increase consumption power because of its diluting effect simultaneously, so need be with sour gas by removing in the unstripped gas.In the gas purifications such as low-temp methanol washing process is widely used in that synthetic ammonia, synthesizing methanol and other carbonyls are synthetic, coal gas, industrial hydrogen production and selexol process, the physical characteristic that this technology utilization methyl alcohol is bigger to sour gas solubility at low temperatures, remove the sour gas in the unstripped gas, focus on CO
2And H
2S is a kind of Physical Absorption process.
Please refer to Fig. 1, Fig. 1 is existing low temperature washing device for methanol schematic diagram, in existing gas purification process, raw gas is at first washed to remove dust and the particle in the raw gas through water scrubber 4, utilize cryogenic media in first heat exchanger 1, raw gas to be cooled off then, in raw gas, spray methyl alcohol by first injection apparatus 2 again after the cooling, then the raw gas that sprays into methyl alcohol is proceeded cooling, as by second heat exchanger 3 or more heat exchanger the most at last raw gas be cooled to about-28 ℃, reach the optimum efficiency of low-temp methanol washing, methyl alcohol is higher to the solubility of sour gas at low temperatures, the sour gas in the raw gas can be removed.
But the heat exchanger pressure reduction in running that can find low temperature washing device for methanol in actual motion can increase gradually, this is because the raw gas humidity of coming out after the water scrubber washing is bigger, cause the tube bank frosting wall built-up of heat exchanger easily, make Kong Shu reduce gradually, stop up, cause pressure reduction to increase gradually, thereby the output of coal gas reduce, and causes economic loss.
The utility model content
The problem that the utility model solves is to provide a kind of low temperature washing device for methanol, and heat exchanger can not produce when operation and stop up and the pressure reduction problem, and gas yield is unaffected.
In order to solve the problems of the technologies described above, the technical solution of the utility model is:
A kind of low temperature washing device for methanol comprises:
In raw gas, spray into second injection apparatus of methanol solution,, spray into first injection apparatus of methanol solution once more to cooled raw gas first heat exchanger that the raw gas that sprays into methanol solution carries out elementary cooling.
As preferably, the shower nozzle of described first injection apparatus is spherical.
As preferably, the shower nozzle of described second injection apparatus is spherical.
As preferably, described low temperature washing device for methanol also comprises at least one the heat exchanger that the raw gas that sprays into methanol solution is once more continued cooling.
Low temperature washing device for methanol provided by the utility model increased the injection apparatus of a methanol solution before raw gas is cooled off, in cooling forward direction raw gas, spray methanol solution, the methyl alcohol atomizing is dissolved in the gas phase, can make the freezing point of raw gas reduce, the water that contains in the raw gas when supercooling just is difficult for condensing again, thereby the blocked phenomenon of tube bank can not appear in heat exchanger, the output of coal gas can not reduce.
Description of drawings
Fig. 1 is existing low temperature washing device for methanol schematic diagram;
The low temperature washing device for methanol schematic diagram that Fig. 2 is provided for a kind of specific embodiment of the utility model.
The specific embodiment
In order further to understand the utility model, below in conjunction with embodiment the utility model preferred embodiment is described, but should be appreciated that these describe just to further specifying feature and advantage of the present utility model, rather than to the restriction of the utility model claim.
The utility model provides a kind of low temperature washing device for methanol, please refer to Fig. 2, the low temperature washing device for methanol schematic diagram that Fig. 2 is provided for a kind of specific embodiment of the utility model, comprise: second injection apparatus 5 that in raw gas, sprays into methanol solution, to first heat exchanger 1 that the raw gas that sprays into methanol solution carries out elementary cooling, spray into first injection apparatus 2 of methanol solution once more to cooled raw gas.
In order to improve mass-transfer efficiency, the shower nozzle of first injection apparatus 2 preferably adopts sphere, can strengthen atomizing effect, and in like manner the shower nozzle of second injection apparatus 1 also preferably adopts spherical.
Preferably behind first injection apparatus 2, at least one heat exchanger is set again, as second heat exchanger 3 or more.
The technology of the low temperature washing device for methanol that use the utility model provides may further comprise the steps:
Step a) sprays into methanol solution in pending raw gas, the methyl alcohol atomizing is added in the raw gas to reduce the freezing point of coal gas.The volumetric concentration of the methanol solution that sprays into is preferably 98%～99.8%, and the amount of methanol solution is preferably 180kg/h～190kg/h.
Step b) is cooled off the raw gas that sprays into methanol solution, owing to be dissolved with methyl alcohol in the raw gas, the freezing point of methyl alcohol is low to be-97 ℃, thereby can reduce the freezing point of raw gas.Therefore after raw gas was cooled, the water that wherein contains can not condense, and has avoided the frosting wall built-up of heat exchanger tube, has improved operating mode, has eliminated pressure reduction, and system can normally be moved, and the purification of raw gas is unaffected.Through this step first order cooling, the temperature of raw gas can be reduced to about 8 ℃ by about 30 ℃.
Step c) sprays into methanol solution once more to cooled raw gas, utilizes bigger to the sour gas solubility at low temperatures physical characteristic of methyl alcohol, removes the sour gas in the raw gas.The volumetric concentration of the methanol solution that sprays into is preferably 98%～99.8%, and the amount of methanol solution is preferably 180kg/h～190kg/h.
For reaching the optimum efficiency of cold washing, as preferably, continue raw gas is cooled off, reduce to-25 ℃～-32 ℃ until the raw gas temperature, generally can proceed to fourth stage cooling.
The low temperature washing device for methanol that uses the utility model to provide purifies raw gas, by in cooling forward direction raw gas, spraying methanol solution, the freezing point of raw gas is reduced, the water that contains in the raw gas can not condense, thereby avoided the obstruction of heat exchanger tube, improve operating mode, guaranteed normally carrying out of Gas Production.
More than low temperature washing device for methanol provided by the utility model is described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (4)
1. a low temperature washing device for methanol is characterized in that, comprising:
In raw gas, spray into second injection apparatus of methanol solution,, spray into first injection apparatus of methanol solution once more to cooled raw gas first heat exchanger that the raw gas that sprays into methanol solution carries out elementary cooling.
2. low temperature washing device for methanol according to claim 1 is characterized in that, the shower nozzle of described first injection apparatus is spherical.
3. low temperature washing device for methanol according to claim 1 is characterized in that, the shower nozzle of described second injection apparatus is spherical.
4. according to each described low temperature washing device for methanol in the claim 1 to 3, it is characterized in that, also comprise at least one the heat exchanger that the raw gas that sprays into methanol solution is once more continued cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201531382U CN201658932U (en) | 2010-04-02 | 2010-04-02 | Rectisol device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201531382U CN201658932U (en) | 2010-04-02 | 2010-04-02 | Rectisol device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201658932U true CN201658932U (en) | 2010-12-01 |
Family
ID=43229340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201531382U Expired - Fee Related CN201658932U (en) | 2010-04-02 | 2010-04-02 | Rectisol device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201658932U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773764A (en) * | 2010-04-02 | 2010-07-14 | 中煤能源黑龙江煤化工有限公司 | Low-temperature rectisol process and device |
| CN104436998A (en) * | 2013-09-17 | 2015-03-25 | 中国石油化工股份有限公司 | Method for removing acid gas by adopting methanol as absorbent |
-
2010
- 2010-04-02 CN CN2010201531382U patent/CN201658932U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101773764A (en) * | 2010-04-02 | 2010-07-14 | 中煤能源黑龙江煤化工有限公司 | Low-temperature rectisol process and device |
| CN101773764B (en) * | 2010-04-02 | 2012-09-05 | 中煤能源黑龙江煤化工有限公司 | Low-temperature rectisol process and device |
| CN104436998A (en) * | 2013-09-17 | 2015-03-25 | 中国石油化工股份有限公司 | Method for removing acid gas by adopting methanol as absorbent |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101201 Termination date: 20140402 |