CN211595547U - Gas-liquid separation ash removal device for chilling chamber of gasification furnace - Google Patents
Gas-liquid separation ash removal device for chilling chamber of gasification furnace Download PDFInfo
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- CN211595547U CN211595547U CN201922126801.3U CN201922126801U CN211595547U CN 211595547 U CN211595547 U CN 211595547U CN 201922126801 U CN201922126801 U CN 201922126801U CN 211595547 U CN211595547 U CN 211595547U
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Abstract
The utility model discloses a gasifier chilling chamber gas-liquid separation ash handling equipment, include: the down pipe is connected with a gas inlet of the chilling chamber, and the outlet end of the down pipe extends into the water bath area; the ascending pipe is sleeved outside the descending pipe and forms an annular cavity separation area with the descending pipe, the length of the lower end of the ascending pipe immersed in the water bath area is greater than that of the descending pipe immersed in the water bath area, and a set distance is reserved between the upper end of the ascending pipe and the top wall of the chilling chamber; the baffling pipe is sleeved on the outer side of the ascending pipe and is in a shape of a pipe body which is narrow in the middle and wide in two ends and is formed by hyperbolic lines and rotating around a central shaft in a surrounding mode. The utility model forms an annular gap between the descending pipe and the ascending pipe, enhances the water bath washing effect and carries out preliminary gas-liquid separation; a space with wide upper and lower ends and narrow middle is formed between the ascending pipe and the baffle plate, and the gas phase and the liquid phase are mixed and separated again through a flow mode of deceleration-acceleration-deceleration; in the space between the baffle plate and the inner wall of the chilling chamber, the wall surface is washed by spraying water, so that the phenomenon of wall sticking and dust deposition is reduced.
Description
Technical Field
The utility model belongs to the coal gasification field relates to the application of water bath washing ash removal in gasifier quench chamber, concretely relates to gasifier quench chamber gas-liquid separation ash removal device.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information constitutes prior art that is already known to a person skilled in the art.
Currently, the coal gasification technology is mainly divided into two processes of coal water slurry gasification and pulverized coal gasification. The coal and the high-pressure pure oxygen are mixed and combusted, and the coal gasification furnace has the advantages of wide coal variety adaptation, high gasification efficiency, high energy utilization rate and the like. The treatment of high-temperature synthesis gas is divided into a water chilling process and a radiation waste boiler process.
In chemical production, the coal gasification process adopting the water chilling process has the inherent advantage of high water-steam ratio, and is particularly beneficial to the energy-saving and consumption-reducing operation of a conversion process. High-temperature slag and crude synthesis gas after reaction in a combustion chamber of the gasification furnace are subjected to water chilling cooling and water bath washing in the chilling chamber, the slag is deposited at the bottom of the chilling chamber and is discharged through a slag discharging system, and the crude synthesis gas enters a subsequent dust removal facility after being cooled and washed. The chilling chamber is mainly used for cooling, washing in water bath for ash removal and humidification of the crude synthesis gas.
In the water chilling process, the effect of washing and ash removal and gas-liquid separation of the chilling chamber directly determines the ash content of the crude synthesis gas and the solid content of the chilling water, and can influence the operation of the chilling chamber and subsequent dust removal facilities such as a washing tower, a cyclone separator and a pipeline, thereby influencing the long-period stability of the gasification furnace. However, the inventor finds that the existing chilling chamber separation structure has poor gas-liquid separation effect, so that the crude synthesis gas carries a large amount of black water to enter subsequent pipelines and equipment, the pipelines are washed and thinned, a large amount of deposited dust in the equipment is blocked, and a safety production accident is formed in severe cases.
Disclosure of Invention
In order to solve the technical problem that exists among the prior art, the utility model aims at providing a gasifier chilling chamber gas-liquid separation ash handling equipment has solved and has smugglied a large amount of black water and flying dust's problem secretly in the crude synthesis gas of chilling chamber, eliminates the phenomenon that crude synthesis gas pipeline erodees, equipment deposition stops up, improves gasifier running quality, improves safe coefficient of operation.
In order to solve the technical problem, the technical scheme of the utility model is that:
a gas-liquid separation ash removal device for a chilling chamber of a gasification furnace comprises:
the down pipe is connected with a gas inlet of the chilling chamber, and the outlet end of the down pipe extends into the water bath area;
the ascending pipe is sleeved outside the descending pipe and forms an annular cavity separation area with the descending pipe, the length of the lower end of the ascending pipe immersed in the water bath area is greater than that of the descending pipe immersed in the water bath area, and a set distance is reserved between the upper end of the ascending pipe and the top wall of the chilling chamber;
the baffling pipe is sleeved on the outer side of the ascending pipe and is in a shape of a pipe body which is narrow in the middle and wide in two ends and is formed by hyperbolic lines and rotating around a central shaft in a surrounding mode.
The raw synthesis gas generated by the combustion of the gasification furnace enters the descending pipe from top to bottom, passes through a water bath formed by chilled water below the descending pipe, is cooled and washed to remove most of fly ash, is subjected to primary ash removal, and enters an annular gap between the descending pipe and the ascending pipe from bottom to top after the primary ash removal.
In the annular space between the descending pipe and the ascending pipe, most of the liquid carried in the synthetic gas is separated from the synthetic gas under the action of gravity, part of fly ash carried by the separated liquid enters a water bath area for secondary ash removal and primary gas-liquid separation, and part of the liquid is still carried by the synthetic gas to enter a cavity surrounded by the ascending pipe and the baffling pipe.
In the cavity enclosed by the ascending pipe and the baffle pipe, the synthesis gas carries liquid to flow downwards, and the baffle plate is of a structural type with two wide ends and a narrow middle, so that the synthesis gas carries the liquid to accelerate gradually, the liquid is fully mixed in the accelerating process, and most of fly ash carried in the gas is transferred into the liquid. After the gas-liquid mixture passes through the middle narrow section, the gas-liquid mixture enters the pressure expansion area, the flow velocity is gradually reduced, gas and liquid are gradually separated under inertia and wall flow effect, the liquid flows down along the outer wall of the ascending pipe along the inner edge, and the gas flows out along the inner wall of the baffle plate along the outer edge, so that three-time ash removal and secondary gas-liquid separation are realized. After being baffled and separated, the gas enters a space between the baffle plate and the chilling chamber, and flows out of the chilling chamber from a synthetic gas outlet at the upper part of the chilling chamber.
Through three-time ash removal and two-time gas-liquid separation, the ash removal rate and the gas-liquid separation efficiency in the synthesis gas can be obviously improved, so that the crude synthesis gas passing through the chilling chamber is cleaner, and the problems of erosion abrasion of the crude synthesis gas after chilling on a pipeline and ash deposition and blockage of equipment can be prevented.
In some embodiments, the central narrowest point of the baffle is located below the upper outlet of the riser.
The synthesis gas flow flowing out from the cavity between the ascending pipe and the descending pipe is accelerated and then decelerated when passing through the baffling pipe.
In some embodiments, the curvature of the baffle is 0.77-1.43. Relevant experiments prove that when the curvature of the baffling pipe is within the range, the baffling pipe has a better flow guiding effect on the synthetic gas so as to improve the separation efficiency of the gas and the liquid.
In some embodiments, the length of the downcomer extending into the water bath zone is from 1 to 2 m.
Furthermore, the length of the ascending pipe extending into the water bath area is 1.6-2.6 m. To ensure that the synthesis gas passing from the downcomer into the water bath zone is able to flow completely from the cavity between the riser and the downcomer.
In some embodiments, a spray nozzle is arranged between the baffle pipe and the chilling chamber, and the spray nozzle is connected with a water source through a pipeline, and the water source is arranged outside the chilling chamber.
The syngas flowing from the baffles can be subjected to spray washing by the spray head to further remove a small amount of fly ash in the syngas. The blockage of the chilling chamber caused by long-time operation can be avoided.
Further, the spray nozzle is arranged at the top of the chilling chamber.
Furthermore, the spray head comprises an annular water distributor and a plurality of nozzles arranged on the annular water distributor.
Furthermore, the nozzles are arranged towards the outer side of the annular water distributor. The outer side of the position is the direction far away from the circle center of the annular water distributor. Spraying the spray water directly on the side wall of the chilling chamber to flush the fly ash adhered on the side wall of the chilling chamber.
The utility model has the advantages that:
the utility model forms an annular gap between the descending pipe and the ascending pipe, enhances the water bath washing effect and carries out preliminary gas-liquid separation; a space with wide upper and lower ends and narrow middle is formed between the ascending pipe and the baffle plate, and the gas phase and the liquid phase are mixed and separated again through a flow mode of deceleration-acceleration-deceleration; in the space between the baffle plate and the inner wall of the chilling chamber, the wall surface is washed by spraying water, so that the phenomenon of wall sticking and dust deposition is reduced.
Through adopting the utility model discloses, can effectively improve cooling, washing, the separating action of chilling chamber, the fly ash volume, the liquid volume that the thick synthetic gas that reduces the chilling chamber export smugglied secretly alleviates the load of follow-up processing facility, eliminates thick synthetic gas pipeline and erodees, deposition phenomenon, prolongs the operation cycle of gasifier, improves the safety and stability operation quality.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a schematic view of the shower pipe according to embodiment 1 of the present invention.
The system comprises a down pipe 1, an ascending pipe 2, a baffling pipe 3, a spray pipe 4, a chilling chamber wall 5, a crude synthesis gas outlet pipe 6, a water bath zone 7, a ring cavity separation zone 8, a baffling separation zone 9, a narrow section accelerating mixing zone 10, a wide section gas-liquid separation zone 11, a spray nozzle 12 and a spray water supply pipe 13.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
A gas-liquid separation ash removal facility in a chilling chamber is shown in figures 1 and 2 and comprises two parts of baffling gas-liquid separation and spraying ash removal. The down pipe 1 is positioned in the middle of the baffling separation device, the lower end of the down pipe extends into a water bath of the chilling chamber for 1.5m, and the high-temperature crude synthesis gas in the down pipe 1 flows from top to bottom. The ascending pipe 2 is sleeved outside the descending pipe 1, the lower end of the ascending pipe extends into a water bath of the chilling chamber for 2.3m, the baffle plate 3 is sleeved outside the ascending pipe 2, the baffle plate 3 is in a shape of a pipe body which is formed by hyperbolic curves and rotates around a central shaft to enclose, the middle of the pipe body is narrow, and the two ends of the pipe body are wide, and the curvature of the hyperbolic curves is 0.77-1.43. The spray pipe 4 is an annular pipe, is arranged outside the baffle plate 3 and is positioned on the upper part of the chilling chamber wall 5.
The downcomer 1 is inserted below the liquid level of the water bath zone 7, the crude synthesis gas flows in the downcomer 1, enters the water bath zone 7, breaks through the liquid level resistance, enters the annular cavity separation zone 8, and washes most of fly ash in the water bath zone 7. In the ring cavity separation zone 8, gas-liquid separation is carried out primarily under the action of gravity. The gas carries the liquid into the baffling separation area 9, turns back and downwards to enter the narrow section accelerated mixing area 10, the gas and the liquid are mixed again, the gas is fully infiltrated, and the entrained fly ash is dissolved into water. After the gas-liquid mixture is accelerated, the gas-liquid mixture enters the wide-section gas-liquid separation zone 11, the flow speed is reduced, the liquid still flows downwards along the outer wall of the ascending pipe under the wall flow effect and the inertia effect, the gas flows along the arc-shaped baffle plate, and the gas and the liquid are effectively separated.
After the gas exits the baffle plate, a small amount of fly ash is still entrained, the flow speed in the space of the chilling chamber is reduced, and the fly ash is easily adhered to the wall 5 of the chilling chamber and gradually accumulated to block and accumulate the ash in the chilling chamber. The external spray water enters a spray water supply pipe 13 in the chilling chamber and enters a spray pipe 4, a plurality of spray nozzles 12 are uniformly distributed below the spray pipe, and the spray water is sprayed on the chilling chamber wall 5 after flowing through the spray nozzles to wash the adhered fly ash. According to the external dimension of the chilling chamber and the installation position of the spray pipe, the installation angle of the spray head can be properly adjusted, so that spray water is sprayed on the wall of the chilling chamber instead of being sprayed in the space.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a gasifier chilling chamber gas-liquid separation ash handling equipment which characterized in that: the method comprises the following steps:
the down pipe is connected with a gas inlet of the chilling chamber, and the outlet end of the down pipe extends into the water bath area;
the ascending pipe is sleeved outside the descending pipe and forms an annular cavity separation area with the descending pipe, the length of the lower end of the ascending pipe immersed in the water bath area is greater than that of the descending pipe immersed in the water bath area, and a set distance is reserved between the upper end of the ascending pipe and the top wall of the chilling chamber;
the baffling pipe is sleeved on the outer side of the ascending pipe and is in a shape of a pipe body which is narrow in the middle and wide in two ends and is formed by hyperbolic lines and rotating around a central shaft in a surrounding mode.
2. The gas-liquid separation and ash removal device for the chilling chamber of the gasification furnace as claimed in claim 1, wherein: the narrowest position in the middle of the baffling pipe is positioned below an outlet at the upper end of the ascending pipe.
3. The gas-liquid separation and ash removal device for the chilling chamber of the gasification furnace as claimed in claim 1, wherein: the curvature of the baffling pipe is 0.77-1.43.
4. The gas-liquid separation and ash removal device for the chilling chamber of the gasification furnace as claimed in claim 1, wherein: the length of the downcomer extending into the water bath zone is 1-2 m.
5. The gas-liquid separation and ash removal device for the chilling chamber of the gasification furnace as claimed in claim 4, wherein: the length of the ascending pipe extending into the water bath area is 1.6-2.6 m.
6. The gas-liquid separation and ash removal device for the chilling chamber of the gasification furnace as claimed in claim 1, wherein: and a spray nozzle is arranged between the baffling pipe and the chilling chamber, the spray nozzle is connected with a water source through a pipeline, and the water source is arranged outside the chilling chamber.
7. The gas-liquid separation and ash removal device for the chilling chamber of the gasification furnace as claimed in claim 6, wherein: the spray nozzle is arranged at the top of the chilling chamber.
8. The gas-liquid separation ash removal device for the chilling chamber of the gasification furnace as claimed in claim 7, wherein: the spray head comprises an annular water distributor and a plurality of nozzles arranged on the annular water distributor.
9. The gas-liquid separation ash removal device for the chilling chamber of the gasification furnace as claimed in claim 8, wherein: the nozzles are arranged towards the outer side of the annular water distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922126801.3U CN211595547U (en) | 2019-11-29 | 2019-11-29 | Gas-liquid separation ash removal device for chilling chamber of gasification furnace |
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| CN201922126801.3U CN211595547U (en) | 2019-11-29 | 2019-11-29 | Gas-liquid separation ash removal device for chilling chamber of gasification furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112175678A (en) * | 2020-10-29 | 2021-01-05 | 兖矿水煤浆气化及煤化工国家工程研究中心有限公司 | Gasification furnace and chilling chamber thereof |
| CN114686274A (en) * | 2022-04-01 | 2022-07-01 | 中国神华煤制油化工有限公司 | Method for cooling and dedusting synthetic gas of gasification furnace and gasification furnace |
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2019
- 2019-11-29 CN CN201922126801.3U patent/CN211595547U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112175678A (en) * | 2020-10-29 | 2021-01-05 | 兖矿水煤浆气化及煤化工国家工程研究中心有限公司 | Gasification furnace and chilling chamber thereof |
| CN114686274A (en) * | 2022-04-01 | 2022-07-01 | 中国神华煤制油化工有限公司 | Method for cooling and dedusting synthetic gas of gasification furnace and gasification furnace |
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