CN110152577B - Device and method for removing propylene tar matters - Google Patents
Device and method for removing propylene tar matters Download PDFInfo
- Publication number
- CN110152577B CN110152577B CN201910563916.0A CN201910563916A CN110152577B CN 110152577 B CN110152577 B CN 110152577B CN 201910563916 A CN201910563916 A CN 201910563916A CN 110152577 B CN110152577 B CN 110152577B
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- valve
- propylene
- distributor
- feeding
- expansion joint
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/008—Feed or outlet control devices
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D301/00—Preparation of oxiranes
- C07D301/02—Synthesis of the oxirane ring
- C07D301/03—Synthesis of the oxirane ring by oxidation of unsaturated compounds, or of mixtures of unsaturated and saturated compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
- C07D303/02—Compounds containing oxirane rings
- C07D303/04—Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A device and a method for removing propylene tar matters, which relate to a chemical production device. The reactor comprises a reaction tower, wherein a distributor is arranged in a longitudinal tower body of the reaction tower, the distributor is connected with a propylene feeding pipeline through a feeding valve, a tower feeding valve is arranged between the feeding valve and the distributor, an expansion joint is arranged between the tower feeding valve and the feeding valve, the expansion joint, the tower feeding valve and the distributor are connected in a penetrating manner, a shower guiding valve is arranged between the feeding valve and the expansion joint, one end of the shower guiding valve is connected with a pipeline between the feeding valve and the expansion joint in a penetrating manner, and the other end of the shower guiding valve is arranged outside. The expansion joint and the shower guide valve are arranged to inject a chemical agent into the propylene pipeline for soaking, so that tar matters of the distributor are dissolved and then enter the process system. The chemical agent does not affect propylene oxide production and does not require a shutdown process.
Description
Technical Field
The invention relates to a chemical production device, in particular to a device and a method for removing tar substances in a propylene pipeline.
Background
In propylene oxide or other production processes using propylene as a raw material or product, tar substances can accumulate in propylene pipelines, valves, distributors, nozzles and the like when the propylene pipeline, the valves, the distributors, the nozzles and the like run for a long time. Tar substances in the propylene pipeline are difficult to treat cleanly, cannot be thoroughly blown out even in long-time steam blowing, and are dangerous if the analysis of fire is qualified, because the high temperature can volatilize the tar substances in the process of gas welding, so that the combustible gas content in the pipeline exceeds the standard, and the propylene pipeline is careful in fire. When the continuous production is operated, the propylene distributor, the valve or the spray nozzle can be blocked when the accumulation of propylene tar substances is more, so that the material is interrupted, and the process accident is caused.
Disclosure of Invention
In order to prevent blockage of tar substances at parts such as a distributor and the like in the production operation process from causing interruption of propylene feeding, the invention provides a device for removing the substances of propylene Jiao Youlei and a method for removing the substances of propylene Jiao Youlei. The propylene pipeline is infused with chemical agents for soaking, and tar matters are dissolved and then enter a process system. The chemical agent does not affect propylene oxide production and does not require a shutdown process.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a get rid of device of propylene tar class material, includes the reaction tower, is equipped with the distributor in the vertical tower body of reaction tower, the distributor be connected with propylene feed line through the feed valve, feed valve and distributor between be equipped with into the tower valve, advance and be equipped with the expansion joint between tower valve and the feed valve, expansion joint, advance tower valve, the distributor and link up and be connected mutually, feed valve and expansion joint between be equipped with and lead to drench the valve, lead to drench the pipeline link up between valve one end and feed valve and the expansion joint and be connected, the other end is arranged outward, expansion joint and advance the tower valve and pass through flange joint.
A method of removing propylene Jiao Youlei material comprising the steps of:
1) When the propylene feeding flow is always reduced, and after the feeding valve of the propylene distributor is closed, the shower guide valve is opened, and no liquid flows out, the blockage of the group of propylene distributors can be judged;
2) When the propylene distributor is blocked, the feeding valve and the tower inlet valve of the distributor are closed, and the shower guide valve is opened for exhaust treatment;
3) Closing a shower guide valve and connecting a chemical solvent injection pipeline;
4) Opening a shower guide valve, and injecting a chemical solvent guide pipe into the expansion joint;
5) Opening a tower inlet valve, and staying for about 4-6 minutes to enable the chemical solvent to fully contact the internal blocking object in the distributor;
6) Closing the shower guide valve, slowly opening the feed valve, and observing the propylene flow condition, wherein if the propylene flow is not increased, the propylene pressure is insufficient or the chemical solvent soaking time is insufficient, and the problem can be solved by introducing high-pressure nitrogen from the shower guide valve or prolonging the chemical solvent soaking time.
Wherein, in step 5), the tower inlet valve is opened, and the residence time is 5 minutes. The chemical solvent is propylene oxide.
The invention is ingenious in that the adopted chemicals are propylene oxide products or crude products, the propylene oxide production process is not affected, and the propylene oxide can be recovered in the subsequent rectification process, so the treatment cost is lower. Under normal conditions, propylene oxide can be directly injected from a shower guide or other standby ports without stopping, so that the stopping loss is avoided. After being dissolved, the tar substances enter a rectification system and finally are discharged out of the production device along with the waste liquid, so that accumulation of the tar substances can be effectively avoided.
Description of the drawings:
FIG. 1 is a schematic diagram of the structure of the device of the present invention:
as shown in the figure: 1. a reaction tower; 2. a distributor; 3. a feed valve; 4. a propylene feed line; 5. a tower inlet valve; 6. an expansion joint; 7. and a shower guide valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As can be seen from fig. 1, the device of the invention comprises a reaction tower 1, wherein a distributor 2 is arranged in a longitudinal tower body of the reaction tower 1, the distributor 2 is connected with a propylene feeding pipeline 4 through a feeding valve 3, a tower inlet valve 5 is arranged between the feeding valve 3 and the distributor 2, an expansion joint 6 is arranged between the tower inlet valve 5 and the feeding valve 3, the expansion joint 6, the tower inlet valve 5 and the distributor 2 are connected in a penetrating way, a shower guide valve 7 is arranged between the feeding valve 3 and the expansion joint 6, one end of the shower guide valve 7 is connected in a penetrating way with the pipeline between the feeding valve 3 and the expansion joint 6, and the other end of the shower guide valve is arranged outside.
Six groups of distributors 2 are arranged in the reaction tower 1, and each group of distributors 2 is connected with a propylene feeding pipeline 4 in the same way.
When the distributor 2 is blocked, chemical solvent is filled through the expansion joint 6, so that the blocking matters in the distributor 2 are dissolved. The flow guide valve 7 can detect whether the distributor 2 is blocked or not, and meanwhile, nitrogen is introduced into the flow guide valve 7 to boost pressure, so that the blocking matters in the distributor 2 are dissolved in an auxiliary manner and the distributor 2 is penetrated in an accelerating manner.
The method for removing the substances of the propylene Jiao Youlei by the device comprises the following steps:
1. when the propylene feeding flow is always reduced and the liquid flows out after the feeding valve 3 of the propylene distributor 2 is closed and the shower guide valve 7 is opened, the group of propylene distributors 2 can be judged to be blocked;
2. when the propylene distributor 2 is blocked, the feed valve 3 and the tower inlet valve 5 of the group of the distributor 2 are closed, and the shower guide valve 7 is opened for exhaust treatment;
3. closing a shower guide valve 7 and connecting a chemical solvent injection pipeline;
4. opening a shower guide valve 7, and injecting a chemical solvent guide pipe into the expansion joint 6;
5. opening a tower inlet valve 5, and staying for about 4-6 minutes to enable the chemical solvent to fully contact the internal blocking object in the distributor 2;
6. closing the shower guide valve 7, slowly opening the feed valve 3, and observing the propylene flow condition, if the propylene flow is not increased, indicating that the propylene pressure is insufficient or the chemical solvent soaking time is insufficient, wherein the problem can be solved by introducing high-pressure nitrogen from the shower guide valve 7 or prolonging the chemical solvent soaking time.
Six groups of distributors 2 are arranged in the tower body of the reaction tower 1, and the removing method of the blocking objects is the same. The chemical solvent used in the invention is propylene oxide product or crude product.
The device and the method effectively solve the problem of blockage of the distributor and have ideal effect. In addition, when the system is stopped and overhauled, if the propylene pipeline needs to be subjected to fire treatment, after the two end sealing blind plates of the pretreated propylene pipeline are isolated, the propylene oxide solution is injected for soaking for a period of time, and then the solution is discharged and recovered. Subsequently, the tubing was purged with steam, with propylene oxide having a low boiling point, and was easily purged.
Claims (3)
1. The method for removing propylene tar substances by using the device for removing the propylene tar substances comprises a reaction tower (1), wherein a distributor (2) is arranged in a longitudinal tower body of the reaction tower (1), the distributor (2) is connected with a propylene feeding pipeline (4) through a feeding valve (3), a tower inlet valve (5) is arranged between the feeding valve (3) and the distributor (2), an expansion joint (6) is arranged between the tower inlet valve (5) and the feeding valve (3), the expansion joint (6), the tower inlet valve (5) and the distributor (2) are connected in a penetrating way, a shower guide valve (7) is arranged between the feeding valve (3) and the expansion joint (6), one end of the shower guide valve (7) is connected in a penetrating way with a pipeline between the feeding valve (3) and the expansion joint (6), and the other end of the shower guide valve (7) is discharged; the method for removing the propylene Jiao Youlei substance comprises the following steps:
1) when the propylene feeding flow is always reduced, and after the feeding valve (3) of the propylene distributor (2) is closed, the shower guide valve (7) is opened, and no liquid flows out, the group of propylene distributors (2) can be judged to be blocked;
2) When the propylene distributor (2) is blocked, the feed valve (3) and the tower inlet valve (5) of the group of the distributor (2) are closed, and the shower guide valve (7) is opened for exhaust treatment;
3) Closing a shower guide valve (7) and connecting a chemical solvent propylene oxide injection pipeline;
4) Opening a shower guide valve (7) and injecting a chemical solvent propylene oxide guide pipe into the expansion joint (6);
5) Opening a tower inlet valve (5) and keeping for about 4-6 minutes to enable the chemical solvent propylene oxide to fully contact with the blocking objects in the distributor (2);
6) Closing the flow guiding valve (7), slowly opening the feeding valve (3), and observing the propylene flow condition, wherein if the propylene flow is not increased, the condition indicates that the propylene pressure is insufficient or the chemical solvent propylene oxide soaking time is insufficient, and the problem can be solved by introducing high-pressure nitrogen from the flow guiding valve (7) or prolonging the chemical solvent propylene oxide soaking time.
2. A method for removing propylene tar by using a device for removing propylene tar as set forth in claim 1, wherein: the expansion joint (6) is connected with the tower inlet valve (5) through a flange.
3. A method for removing propylene tar by using a device for removing propylene tar as set forth in claim 1, wherein: in step 5), the inlet valve (5) was opened and the residence time was 5 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910563916.0A CN110152577B (en) | 2019-06-26 | 2019-06-26 | Device and method for removing propylene tar matters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910563916.0A CN110152577B (en) | 2019-06-26 | 2019-06-26 | Device and method for removing propylene tar matters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110152577A CN110152577A (en) | 2019-08-23 |
| CN110152577B true CN110152577B (en) | 2023-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910563916.0A Active CN110152577B (en) | 2019-06-26 | 2019-06-26 | Device and method for removing propylene tar matters |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1940071A1 (en) * | 1969-08-06 | 1971-02-18 | Theodor Schuchardt Gmbh & Co D | Reaction tower for continuous chemical - processes |
| CN203144359U (en) * | 2013-01-14 | 2013-08-21 | 山西潞安矿业(集团)有限责任公司 | Gas cooling system of Lurgi gas furnace |
| CN203598807U (en) * | 2013-11-28 | 2014-05-21 | 山东蓝星东大化工有限责任公司 | Device for producing epoxypropane by chlorohydrination |
| CN203750507U (en) * | 2014-02-18 | 2014-08-06 | 开封龙宇化工有限公司 | Anti-blocking blowing device of gaseous phase feeding pipeline |
| CN104437267A (en) * | 2013-09-24 | 2015-03-25 | 中国石油化工股份有限公司 | Device for preparing olefin with oxygen compounds and application of device for preparing olefin with oxygen compounds |
| CN206356331U (en) * | 2016-11-03 | 2017-07-28 | 新疆广汇新能源有限公司 | Preventing clogging up device in raw gas cooling procedure |
| CN210584881U (en) * | 2019-06-26 | 2020-05-22 | 天津大沽化工股份有限公司 | Device for removing propylene tar substances |
-
2019
- 2019-06-26 CN CN201910563916.0A patent/CN110152577B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1940071A1 (en) * | 1969-08-06 | 1971-02-18 | Theodor Schuchardt Gmbh & Co D | Reaction tower for continuous chemical - processes |
| CN203144359U (en) * | 2013-01-14 | 2013-08-21 | 山西潞安矿业(集团)有限责任公司 | Gas cooling system of Lurgi gas furnace |
| CN104437267A (en) * | 2013-09-24 | 2015-03-25 | 中国石油化工股份有限公司 | Device for preparing olefin with oxygen compounds and application of device for preparing olefin with oxygen compounds |
| CN203598807U (en) * | 2013-11-28 | 2014-05-21 | 山东蓝星东大化工有限责任公司 | Device for producing epoxypropane by chlorohydrination |
| CN203750507U (en) * | 2014-02-18 | 2014-08-06 | 开封龙宇化工有限公司 | Anti-blocking blowing device of gaseous phase feeding pipeline |
| CN206356331U (en) * | 2016-11-03 | 2017-07-28 | 新疆广汇新能源有限公司 | Preventing clogging up device in raw gas cooling procedure |
| CN210584881U (en) * | 2019-06-26 | 2020-05-22 | 天津大沽化工股份有限公司 | Device for removing propylene tar substances |
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| CN110152577A (en) | 2019-08-23 |
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