CN202893172U - Catalytic cracking dry-gas refinement separation system - Google Patents
Catalytic cracking dry-gas refinement separation system Download PDFInfo
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- CN202893172U CN202893172U CN201220486524.2U CN201220486524U CN202893172U CN 202893172 U CN202893172 U CN 202893172U CN 201220486524 U CN201220486524 U CN 201220486524U CN 202893172 U CN202893172 U CN 202893172U
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Abstract
The utility model relates to a catalytic cracking dry-gas refinement separation system, which comprises a pyrolysis gas buffer tank, a waste lye buffer tank, a dry gas alkali washing tower and a pyrolysis gas compressor, and the catalytic cracking dry-gas refinement separation system is characterized in that the dry-gas alkali washing tower is provided with a pyrolysis gas inlet, the top is provided with a pyrolysis gas outlet, the pyrolysis gas outlet is communicated with the pyrolysis gas buffer tank, and the pyrolysis gas buffer tank is communicated with the pyrolysis gas compressor; and the dry gas alkali washing tower is provided with an alkali lye inlet, the bottom is provided with an alkali lye outlet, and the alkali outlet is communicated with the alkali buffer tank. The catalytic cracking dry-gas refinement separation system has the beneficial effects that after the system is additionally provided with the dry gas alkali washing tower, the utilization rate of raw materials can be increased, and the production cost can be reduced; the emission of acid gas can be reduced, the acid gas is neutralized in the alkali lye to obtain salt solution to be recycled, and more energy conservation and environmental protection can be realized; and the yield of target products can be increased, and the profit can be increased.
Description
Technical field
The utility model relates to technical field of chemical, specifically the refining piece-rate system of a kind of catalytic pyrolysis dry gas with the dry gas caustic wash tower.
Background technology
At present, catalytic pyrolysis (CPP) prepares that ethylene cracking gas is refining to adopt the method for predepropanization front-end hydrogenation cryogenic separation that cracking gas is separated with separative element usually, finally obtains highly purified ethene or propylene product.Catalytic pyrolysis (DCC) dry gas with cat-cracker in the practical operation carries out freshening, with components such as the ethene in the recovery DCC dry gas, ethane.But because of the DCC device without the alkali cleaning system, cause being mingled with in the DCC dry gas a large amount of H
2S, CO
2, the sour gas such as mercaptan.Not only can cause the corrosion of the equipment such as cracking gas intersegmental cooler, surge tank in the long-term production process, also can increase caustic wash tower alkali cleaning load, the device operating flexibility is descended.Can produce certain pollution to environment in addition.The spent lye that produces in the production process effluxes after directly advancing salkali waste surge tank buffering, is not effectively utilized, and causes the productive rate of target product lower.
Summary of the invention
Be utilize resources synthetically, improve the productive rate of target product ethene or propylene, increase economic benefit, original refining piece-rate system is transformed.The utility model provides a kind of catalytic pyrolysis dry gas to make with extra care piece-rate system.
The utility model is achieved through the following technical solutions:
A kind of catalytic pyrolysis dry gas is made with extra care piece-rate system, comprise cracking gas surge tank, spent lye surge tank, dry gas caustic wash tower, charge gas compressor, it is characterized in that: at the dry gas caustic wash tower cracking gas entrance is set, the top arranges the cracking gas outlet, described cracking gas outlet is connected with the cracking gas surge tank, and the cracking gas surge tank is connected with charge gas compressor; On the described dry gas soda tower alkali liquor inlet is set, the bottom arranges the alkali lye outlet, and described alkali lye outlet is connected with the alkali lye surge tank.
Described cracking gas entrance is positioned at bottom or the bottom of dry gas caustic wash tower.
Described alkali liquor inlet is positioned at top or the top of dry gas caustic wash tower.
The beneficial effects of the utility model are as follows: after setting up the dry gas caustic wash tower, improve raw material availability, reduced production cost; Reduced the discharging of sour gas, with sour gas in alkali lye and the recycling of gained salting liquid, more energy-conserving and environment-protective; Improve the productive rate of target product, improved profit.
Description of drawings
Fig. 1 is schematic flow sheet of the present utility model.
Main Reference numeral implication: 1. cracking gas surge tank; 2. spent lye surge tank; 3. dry gas caustic wash tower; 4. charge gas compressor; 51. valve I; 52. valve II; 53. valve III; 54. valve IV; The A:DCC dry gas; B. spent lye; C. the spent lye behind the caustic prescrub.
Below in conjunction with accompanying drawing the utility model technology is described in further details; but following example only is the utility model example wherein; do not represent the rights protection scope that the utility model limits, rights protection scope of the present utility model is as the criterion with claims.
The specific embodiment
Embodiment 1
A kind of catalytic pyrolysis dry gas is as shown in Figure 1 made with extra care piece-rate system, comprise cracking gas surge tank 1, spent lye surge tank 2, dry gas caustic wash tower 3, charge gas compressor 4, in dry gas caustic wash tower bottom the cracking gas entrance is set, top of tower arranges the cracking gas outlet, described cracking gas outlet is connected with cracking gas surge tank 1, and cracking gas surge tank 1 is connected with charge gas compressor 4.Described dry gas soda tower 3 tops arrange alkali liquor inlet, and tower bottom arranges the alkali lye outlet, and described alkali lye outlet is connected with alkali lye surge tank 2.
Before DCC dry gas A enters cracking gas surge tank 1, enter by valve I first and done caustic wash tower 3 and carry out caustic prescrub, remove the most of acidic materials that mix among the DCC dry gas A; DCC dry gas A after the alkali cleaning enters cracking gas surge tank 1 by valve II, then enters charge gas compressor 4 and makes with extra care.Wherein the used alkali lye of caustic prescrub is spent lye B, it mixes with from bottom to top DCC dry gas from top to bottom by valve III caustic wash tower 3 from dried, remove most of acidic materials among the DCC dry gas A, spent lye C behind the caustic prescrub enters spent lye surge tank 2 by the alkali lye outlet of dry gas caustic wash tower 3 bottoms with valve IV, discharges at last.
At valve I and valve II, add between valve III and the valve IV valve with between the raising equipment can be handling.According to using needs to increase the quantity of dry gas caustic wash tower, to reach better alkali cleaning effect.
Claims (3)
1. the catalytic pyrolysis dry gas is made with extra care piece-rate system, comprise cracking gas surge tank, spent lye surge tank, dry gas caustic wash tower, charge gas compressor, it is characterized in that: at the dry gas caustic wash tower cracking gas entrance is set, the top arranges the cracking gas outlet, described cracking gas outlet is connected with the cracking gas surge tank, and the cracking gas surge tank is connected with charge gas compressor; On the described dry gas soda tower alkali liquor inlet is set, the bottom arranges the alkali lye outlet, and described alkali lye outlet is connected with the alkali lye surge tank.
2. catalytic pyrolysis dry gas according to claim 1 is made with extra care piece-rate system, and it is characterized in that: described cracking gas entrance is positioned at bottom or the bottom of dry gas caustic wash tower.
3. catalytic pyrolysis dry gas according to claim 1 is made with extra care piece-rate system, and it is characterized in that: described alkali liquor inlet is positioned at top or the top of dry gas caustic wash tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220486524.2U CN202893172U (en) | 2012-09-24 | 2012-09-24 | Catalytic cracking dry-gas refinement separation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220486524.2U CN202893172U (en) | 2012-09-24 | 2012-09-24 | Catalytic cracking dry-gas refinement separation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202893172U true CN202893172U (en) | 2013-04-24 |
Family
ID=48113894
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220486524.2U Expired - Lifetime CN202893172U (en) | 2012-09-24 | 2012-09-24 | Catalytic cracking dry-gas refinement separation system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202893172U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104923028A (en) * | 2015-06-02 | 2015-09-23 | 江苏三美化工有限公司 | Method for dehydrating coarse pyrolysis gas in production of vinylidene fluoride and dehydration device |
-
2012
- 2012-09-24 CN CN201220486524.2U patent/CN202893172U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104923028A (en) * | 2015-06-02 | 2015-09-23 | 江苏三美化工有限公司 | Method for dehydrating coarse pyrolysis gas in production of vinylidene fluoride and dehydration device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |
|
| CX01 | Expiry of patent term |