CN112121564A - Methanol-to-olefin product gas washing cooling structure and system - Google Patents
Methanol-to-olefin product gas washing cooling structure and system Download PDFInfo
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- CN112121564A CN112121564A CN202010955135.9A CN202010955135A CN112121564A CN 112121564 A CN112121564 A CN 112121564A CN 202010955135 A CN202010955135 A CN 202010955135A CN 112121564 A CN112121564 A CN 112121564A
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- washing
- product gas
- methanol
- cooling tower
- catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
- F28C1/00—Direct-contact trickle coolers, e.g. cooling towers
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- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to the technical field of methanol-to-olefin, and discloses a methanol-to-olefin product gas washing and cooling structure and a system, wherein the methanol-to-olefin product gas washing and cooling structure comprises a washing and cooling tower (2) and a cleaning device, an air inlet, an air outlet and a first water inlet are formed in the washing and cooling tower (2), the washing and cooling tower (2) is connected with the water inlet of the cleaning device through a pump piece (3) so as to discharge wastewater in the washing and cooling tower (2) to the cleaning device, the cleaning device can treat the wastewater, and the cleaning device is connected with the first water inlet of the washing and cooling tower (2) so as to discharge the treated wastewater to the washing and cooling tower (2). The application provides a methanol to olefin product gas washing cooling structure can get rid of the catalyst granule in the product gas and reduce the superheat degree of product gas, and can reuse the washing water, simultaneously because the catalyst is handled in belt cleaning device, can not cause the jam of washing cooling tower.
Description
Technical Field
The invention relates to the technical field of methanol to olefin, in particular to a methanol to olefin product gas washing and cooling structure and system.
Background
Ethylene and propylene are basic raw materials for petrochemical industry, and the past processes are obtained by hydrocarbon cracking or catalytic cracking. Under the situation that the global petroleum supply is increasingly tense, a process for producing low-carbon olefin by using oxide, particularly methanol and ethanol, as raw materials is developed. Alcohols can be produced from natural gas or coal synthesis gas, thus avoiding the use of petroleum resources.
At present, in the prior art of an MTO device, product gas directly enters a quench tower and a water washing tower to remove a catalyst in the product gas and cool the product gas, the particle content in the quench water and the water washing water is high in the operation process, the treatment capacity is seriously influenced, and meanwhile, a system heat exchanger is frequently cleaned, particularly, the quench water heat exchanger is frozen and cracked in winter due to the fact that the catalyst blocks the heat exchanger tube bundle.
Therefore, the existing methanol-to-olefin process needs to be improved to solve the problem of frequent blockage and cleaning of the heat exchanger of the quenching water system.
Disclosure of Invention
The invention aims to overcome the technical problem that a heat exchanger is blocked due to catalyst particles in a methanol-to-olefin system in the prior art, and provides a methanol-to-olefin product gas washing and cooling structure.
In order to achieve the above object, the present invention provides a methanol-to-olefin product gas washing and cooling structure, which includes a washing and cooling tower and a cleaning device, wherein the washing and cooling tower is provided with an air inlet, an air outlet and a first water inlet, the washing and cooling tower is connected to the water inlet of the cleaning device through a pump to discharge wastewater in the washing and cooling tower to the cleaning device, the cleaning device is capable of treating the wastewater, and the cleaning device is connected to the first water inlet of the washing and cooling tower to discharge the treated wastewater to the washing and cooling tower.
Through above-mentioned technical scheme, product gas can follow the intake pipe and pass through in the air inlet gets into the washing cooling tower, then enter into the outlet duct and carry the quench water washing unit of low reaches from the gas vent, the washing cooling tower utilizes the washing water to spray product gas, cool down product gas, and the washing water can beat the catalyst granule that smugglies secretly in the product gas and fall along with the washing water, the waste water of formation utilizes the suction of pump spare to get into in the cleaning device, cleaning device can handle the catalyst granule in the waste water filtration waste water, and in sending the waste water after filtering back to the washing cooling tower, continue to use as the washing water. The application provides a methanol to olefin product gas washing cooling structure can get rid of the catalyst granule in the product gas and reduce the superheat degree of product gas, and can reuse the washing water, simultaneously because the catalyst is handled in belt cleaning device, can not cause the jam of washing cooling tower.
Optionally, a second water inlet communicated with the outside is arranged on the washing cooling tower.
Optionally, the first water inlet and the second water inlet are both located at a position higher than the air inlet.
Optionally, the second water inlet is located at a position lower than the air outlet.
Optionally, the first water inlet and the second water inlet are located on opposite sides of the scrubber cooling tower.
Optionally, the cleaning device comprises a catalyst separator for receiving the wastewater conveyed by the pumping element, the catalyst separator being capable of separating catalyst from the wastewater and discharging the treated wastewater into the scrubbing and cooling tower through the first water inlet.
Optionally, the cleaning device further comprises a catalyst separator, and the catalyst dryer is connected with the catalyst separator.
Optionally, the catalyst dryer is provided with a gas input pipe and a gas discharge pipe, and the catalyst separator is connected with the catalyst dryer through a slurry discharge pipe.
Optionally, the gas inlet tube is fluidly connected to a gas source for providing an inert gas.
The second aspect of the invention provides a methanol-to-olefin product gas washing and cooling system, which comprises the above methanol-to-olefin product gas washing and cooling structure.
Drawings
FIG. 1 is a schematic diagram of a methanol to olefins product gas scrubbing cooling configuration according to a preferred embodiment of the present application.
Description of the reference numerals
1-air inlet pipe 2-washing cooling tower 3-pump 4-catalyst separator 5-catalyst dryer 6-pump pipe 7-slurry discharge pipe 8-air outlet pipe 9-return pipe 11-gas input pipe 12-gas discharge pipe 13-water replenishing pipe
Detailed Description
The application provides a methanol-to-olefin product gas washing cooling structure, as shown in fig. 1, methanol-to-olefin product gas washing cooling structure includes washing cooling tower 2 and cleaning device, be provided with air inlet, gas vent and first water inlet on the washing cooling tower 2, washing cooling tower 2 connects through pump spare 3 cleaning device's water inlet is in order to incite somebody to action waste water in the washing cooling tower 2 discharges cleaning device, cleaning device can handle waste water, and cleaning device connects the first water inlet of washing cooling tower 2 is in order to handle the back waste water discharges in the washing cooling tower 2.
As shown in fig. 1, the product gas can enter a washing cooling tower 2 from an air inlet pipe 1 through an air inlet, then enter an air outlet pipe 8 from an air outlet and is conveyed to a downstream rapid cooling water washing unit, the washing cooling tower sprays the product gas by using washing water to cool the product gas, the washing water can beat catalyst particles carried in the product gas and fall along with the washing water, formed wastewater enters a cleaning device by using the suction force of a pump piece 3, the cleaning device can treat the catalyst particles in the wastewater filtered by the wastewater, and the filtered wastewater is sent back to the washing cooling tower to be continuously used as the washing water.
The application provides a methanol to olefin product gas washing cooling structure can get rid of the catalyst granule in the product gas and reduce the superheat degree of product gas, and can reuse the washing water, simultaneously because the catalyst is handled in belt cleaning device, can not cause the jam of washing cooling tower.
The cleaning device comprises a catalyst separator 4 capable of separating catalyst particles in the wastewater and a catalyst dryer 5 capable of treating the catalyst, as shown in fig. 1, a pump member 3 is connected with the catalyst separator 4 through a pump member pipe 6 to convey the wastewater in the washing and cooling tower 2 to the catalyst separator 4, the catalyst separator 4 can filter the catalyst particles in the wastewater and return the filtered wastewater to the washing and cooling tower 2 through a return pipe 9 connected with a first water inlet of the washing and cooling tower 2 to be used as washing water for continuous use, and on the other hand, slurry containing the catalyst formed by separating the catalyst particles by the catalyst separator 4 can be discharged into the catalyst dryer 5 through a slurry discharge pipe 7 so that the catalyst dryer 5 can treat the slurry.
Wherein, in an embodiment of the present application, a filter screen is disposed inside the catalyst separator 4 to separate water and catalyst particles, as shown in fig. 1, the pump member 3 can provide a negative pressure, the pressure in the direction of the return pipe 9 is low, so that the filtered water returns to the washing and cooling tower 2 again, while the catalyst particles will remain in the catalyst separator 4, when the pump member 3 is closed, the catalyst particles can be discharged from the catalyst separator 4 to the catalyst dryer 5, and the catalyst particles are dried in the catalyst dryer 5 and then transported to a corresponding treatment site for treatment to avoid environmental pollution. Of course, the catalyst separator 4 may also be configured to separate water and catalyst particles using other suitable configurations.
In order to make the catalyst particles in the catalyst separator 4 enter the catalyst dryer 5, as shown in fig. 1, a gas input pipe 11 and a gas discharge pipe 12 are arranged on the catalyst separator 4, the gas input pipe 11 is connected with a gas source so as to provide gas into the catalyst separator 4, when the pump element 3 is shut down, the gas can enter the catalyst separator 4 from the gas input pipe 11 and flow to the catalyst dryer 5 through the slurry discharge pipe 7, so that a pushing effect is provided for the slurry formed by the catalyst particles, and the slurry can enter the catalyst dryer 5 and be dried.
When the gas input pipe 11 is used for supplying the pushing gas, the gas input pipe 11 supplies back-blowing gas to the catalyst separator 4, and the gas discharge pipe 12 is closed; after completion, the gas discharge pipe 12 is opened again so that the gas is discharged out of the catalyst separator 4. Wherein, the gas can be inert gas with stable property, and the gas input pipe 11 is connected with a gas source for providing inert gas, preferably nitrogen.
The washing cooling tower 2 is also provided with a second water inlet, and a washing water supply source can supply washing water to the washing cooling tower 2 through a water replenishing pipe 13, so that sufficient washing water in the washing cooling tower 2 is ensured to treat the product gas. As shown in figure 1, the height of the positions of the first water inlet and the second water inlet is higher than that of the position of the air inlet and lower than that of the position of the air outlet, so that the washing water introduced into the washing cooling tower 2 through the first water inlet and the second water inlet can be sprayed.
In the preferred embodiment of the present application, as shown in fig. 1, the first water inlet and the second water inlet are located at opposite sides of the scrubbing-cooling tower 2, that is, the position where the return pipe 9 and the water replenishing pipe 13 are connected to the scrubbing-cooling tower 2 is located at opposite sides of the scrubbing-cooling tower 2, so that the scrubbing water can spray the product gas at multiple positions, and the purification effect on the product gas is improved.
This application second aspect provides a methanol to olefins product gas washes cooling system, methanol to olefins product gas washes cooling system includes as above methanol to olefins product gas washes cooling structure.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. Including each of the specific features, are combined in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (10)
1. The utility model provides a cooling structure is washed to methyl alcohol system alkene product gas, its characterized in that, cooling structure is washed to methyl alcohol system alkene product gas includes washing cooling tower (2) and cleaning device, be provided with air inlet, gas vent and first water inlet on washing cooling tower (2), washing cooling tower (2) are connected through pump spare (3) cleaning device's water inlet is in order to discharge waste water in washing cooling tower (2) cleaning device, cleaning device can handle waste water, and cleaning device connects the first water inlet of washing cooling tower (2) is in order to discharge the waste water after will handling in washing cooling tower (2).
2. The methanol to olefin product gas scrubbing cooling structure as claimed in claim 1, wherein said scrubbing cooling tower (2) is provided with a second water inlet communicated with the outside.
3. The methanol-to-olefin product gas scrubbing cooling structure of claim 2, wherein the first water inlet and the second water inlet are both located at a position higher than the gas inlet.
4. The methanol to olefin product gas scrubbing cooling structure of claim 2, wherein the second water inlet is located at a position lower than the gas outlet.
5. The methanol to olefins product gas scrubbing cooling structure of any of claims 2-4, the first water inlet and the second water inlet being located on opposite sides of the scrubbing cooling tower (2).
6. The methanol to olefin product gas scrubbing cooling structure according to claim 1, wherein the cleaning device comprises a catalyst separator (4), the catalyst separator (4) is used for receiving the wastewater conveyed by the pumping element (3), and the catalyst separator (4) is capable of separating out catalyst in the wastewater and discharging the treated wastewater into the scrubbing cooling tower (2) through the first water inlet.
7. The methanol to olefin product gas scrubbing cooling structure according to claim 6, wherein the cleaning device further comprises a catalyst dryer (5), and the catalyst dryer (5) is connected to the catalyst separator (4).
8. The methanol to olefin product gas washing and cooling structure according to claim 7, wherein the catalyst dryer (5) is provided with a gas input pipe (11) and a gas discharge pipe (12), and the catalyst separator (4) is connected to the catalyst dryer (5) through a slurry discharge pipe (7).
9. The methanol to olefin product gas scrubbing cooling structure of claim 8, wherein said gas inlet pipe (11) is fluidly connected to a gas source for providing an inert gas.
10. A methanol-to-olefin product gas scrubbing cooling system, characterized in that the methanol-to-olefin product gas scrubbing cooling system comprises the methanol-to-olefin product gas scrubbing cooling structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010955135.9A CN112121564A (en) | 2020-09-11 | 2020-09-11 | Methanol-to-olefin product gas washing cooling structure and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010955135.9A CN112121564A (en) | 2020-09-11 | 2020-09-11 | Methanol-to-olefin product gas washing cooling structure and system |
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| CN112121564A true CN112121564A (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010955135.9A Pending CN112121564A (en) | 2020-09-11 | 2020-09-11 | Methanol-to-olefin product gas washing cooling structure and system |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101658799A (en) * | 2009-09-14 | 2010-03-03 | 洛阳瑞泽石化工程有限公司 | Continuous catalyst regeneration method and device thereof |
| CN102093153A (en) * | 2010-11-05 | 2011-06-15 | 华东理工大学 | Optimal combination method and device for purifying and separating MTO (Methanol To Olefins) reaction gas containing catalyst micropowder |
| CN105418350A (en) * | 2014-09-12 | 2016-03-23 | 中国石化工程建设有限公司 | Methane removing tower tail gas recovery system and tail gas recovery method |
| CN209917513U (en) * | 2019-04-24 | 2020-01-10 | 国家能源投资集团有限责任公司 | Quenching device and methanol-to-olefin device |
-
2020
- 2020-09-11 CN CN202010955135.9A patent/CN112121564A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101658799A (en) * | 2009-09-14 | 2010-03-03 | 洛阳瑞泽石化工程有限公司 | Continuous catalyst regeneration method and device thereof |
| CN102093153A (en) * | 2010-11-05 | 2011-06-15 | 华东理工大学 | Optimal combination method and device for purifying and separating MTO (Methanol To Olefins) reaction gas containing catalyst micropowder |
| CN105418350A (en) * | 2014-09-12 | 2016-03-23 | 中国石化工程建设有限公司 | Methane removing tower tail gas recovery system and tail gas recovery method |
| CN209917513U (en) * | 2019-04-24 | 2020-01-10 | 国家能源投资集团有限责任公司 | Quenching device and methanol-to-olefin device |
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Application publication date: 20201225 |