CN211079062U - Synthetic gas washing system suitable for harsh working conditions - Google Patents
Synthetic gas washing system suitable for harsh working conditions Download PDFInfo
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- CN211079062U CN211079062U CN201921780137.8U CN201921780137U CN211079062U CN 211079062 U CN211079062 U CN 211079062U CN 201921780137 U CN201921780137 U CN 201921780137U CN 211079062 U CN211079062 U CN 211079062U
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Abstract
The utility model discloses a synthetic gas washing system who adapts to harsh operating mode relates to the synthetic gas washing technical field. The utility model comprises a gasification furnace, a black water treatment system, a first-stage Venturi scrubber, a cyclone separator, a second-stage Venturi scrubber, a washing tower and a water pump; the water pump is communicated with the second-stage Venturi scrubber through a second washing water inlet pipe, communicated with the first-stage Venturi scrubber through a first washing water connecting pipe and communicated with the gasification furnace through a gasification furnace chilling water pipe. The utility model discloses a reposition of redundant personnel of black water that solid content is high and black water that solid content is low is showing and is reducing the solid content that gets into the washing tower black water, effectively alleviates chilling water system and opening the jam and the wearing and tearing problem that park and normal operating in-process exist, has improved the reliability of chilling discharge and the stability of chilling chamber liquid level, has reduced the fault parking probability that from this probably brings, one-level is moist and cyclone, the engineering realization degree of difficulty is low, and the reliability is high.
Description
Technical Field
The utility model belongs to the technical field of the synthetic gas washing, especially, relate to a synthetic gas washing system who adapts to harsh operating mode.
Background
Gasification is still the most effective way to utilize hydrocarbon fuels such as coal in a large scale, high efficiency and clean manner, and is also the leading technology of related chemical engineering processes. The fuel used comprises coal, petroleum coke, asphalt, biomass and even garbage and other generalized hydrocarbon fuels. The entrained flow gasification technology is a mainstream technology in the coal gasification technology due to high production strength and strong environmental protection.
The entrained flow gasification reaction is that coal or other hydrocarbon and oxygen are partially oxidized in a gasification furnace through slurry or pneumatic transmission to generate synthesis gas. The main components of the synthesis gas are hydrogen and carbon monoxide, as well as small amounts of water vapor, carbon dioxide, hydrogen sulfide, methane and nitrogen, trace carbonyl sulfide (COS), etc., and liquid slag consisting of carbon residue and ash in the feedstock. Therefore, to obtain useful and effective synthesis gas (carbon monoxide and hydrogen), it is necessary to reduce the temperature and remove the solids.
The high-temperature synthetic gas from the gasification furnace passes through a chilling or waste heat boiler or a combined process of chilling and heating the waste heat boiler, and enters a synthetic gas wetting and washing system after the temperature is reduced to a saturation temperature corresponding to the pressure of the synthetic gas.
Typical syngas wetting and scrubbing systems are venturi scrubbers, scrubbers and chilled water pumps. As shown in figure 1, the raw synthesis gas from the chilling chamber firstly enters a Venturi scrubber, is mixed and wetted with Venturi feed water, and then enters a washing tower. The syngas is further scrubbed in a scrubber with process water (condensate, high pressure grey water and boiler feed water) to reduce the solids content of the syngas (solids content expected to be less than 1mg/m 3). The synthesis gas moistening and scrubbing system of (a) as shown in figure 1 is internally equipped with internals for removing solids and liquid droplets entrained by the synthesis gas, such as gas distributors, downcomers/risers, trays and defoamers, etc. The synthesis gas and process water are contacted counter-currently at the tray and the scrubbed synthesis gas exits the top of the scrubber. The washed water (black water) contains a large amount of solids carried by part of the synthesis gas, most of the black water is recycled to the gas-forming chilling system (a gasification furnace and a Venturi scrubber) through a chilling water pump for further utilization, and a small part of the black water is discharged to a flash evaporation system.
Problems with typical syngas wetting and scrubbing systems are:
(1) under the operation conditions of poor coal quality, low concentration of coal water slurry, high load and the like, the synthesis gas is easy to carry water, and the wetting and washing effects are poor, so that the synthesis gas carries ash. The ash entrained in the syngas can adversely affect downstream units, such as heat exchanger plugging and reduced heat transfer capacity, increased shift converter pressure differential, and reduced catalyst reactivity.
(2) The solids entrained in the raw synthesis gas from the gasifier are substantially entrained in the black water at the bottom of the scrubber, which therefore contains a significant amount of solids. Because the black water at the bottom of the washing tower is turbulent severely, the black water which deactivates the cooling ring and the Venturi scrubber inevitably carries part of solids, so that the chilling water filter is blocked, the chilling water pipeline, a valve and a pump are seriously abraded, and even a descending pipe is burnt through due to abrasion of the chilling ring; therefore, aiming at the problems, the synthesis gas washing system suitable for the harsh working conditions is of great significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a synthetic gas washing system who adapts to harsh operating mode, through the two-stage wetting, one-level whirlwind separation and one-level washing separation, the desorption effect of solid is smugglied secretly to effective reinforcing synthetic gas, reduce the solid volume of bringing into gasification low reaches device, the first order venturi scrubber is moist and one-level whirlwind separation, the reposition of redundant personnel of black water that the solid content is high and black water that the solid content is low has been realized, the black water that the solid content is high of cyclone bottom gets into black water processing apparatus or returns the gasifier, can show the solid content that reduces and get into the washing tower black water, effectively alleviate the quench water system in opening the parking and the normal operating in-process jam and the wearing and tearing problem that exist, the reliability of quench water flow and the stability of quench chamber liquid level have been improved, the fault probability that can bring from this has been reduced, one-level wetting and whirlwind splitter, the engineering realization difficulty is low, and the reliability is high.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
the utility model discloses a synthetic gas scrubbing system that adapts to harsh operating mode, including gasifier, black water processing system, first order venturi scrubber, cyclone, second level venturi scrubber, scrubbing tower and water pump;
the water pump adopts an independent chilling washing water pump or a water pump group consisting of the chilling water pump and the washing water pump; the water pump is used for pressurizing process washing water, communicated with the second-stage Venturi scrubber through a second washing water inlet pipe, communicated with the first-stage Venturi scrubber through a first washing water connecting pipe and communicated with the gasification furnace through a gasification furnace chilling water pipe;
the first-stage venturi scrubber is used for primarily wetting the crude synthesis gas from the gasification furnace, and is communicated with the gasification furnace through a crude synthesis gas outlet pipe and communicated with the cyclone separator through a first scrubber gas outlet pipe;
the cyclone separator is used for preliminarily removing solids in the crude synthesis gas, the top of the cyclone separator is communicated with the side part of the second-stage Venturi scrubber through a cyclone separator air outlet pipe, and the bottom of the cyclone separator is communicated with a black water treatment system through a cyclone separator black water outlet pipe;
the second-stage Venturi scrubber is used for secondarily wetting the crude synthesis gas and communicated with the side part of the scrubbing tower through a second scrubber gas outlet pipe;
the washing tower is used for washing the synthesis gas to remove the solid participating in the synthesis gas, the top of the washing tower is communicated with a washing tower gas outlet pipe, the bottom of the washing tower is communicated with a black water treatment system through a washing tower black water outlet pipe, and the low water level side part is communicated with a water pump through a washing tower bottom chilling washing water outlet pipe; and a process washing water inlet pipe is arranged on the side part of the washing tower.
Further, at least 2 process washing water inlet pipes are arranged.
Further, a tower tray and a demister are arranged in the washing tower.
The utility model discloses following beneficial effect has:
(1) the utility model discloses a two-stage is moist, one-level cyclone separation and one-level washing separation, and the desorption effect of solid is smugglied secretly to effective reinforcing synthetic gas, reduces the solid volume of bringing into gasification low reaches device.
(2) The black water with high solid content at the bottom of the cyclone separator enters the black water treatment device or returns to the gasification furnace, so that the solid content of the black water entering the washing tower can be obviously reduced, the problems of blockage and abrasion of the chilling water system in the processes of starting and stopping and normal operation are effectively solved, the reliability of chilling water flow and the stability of the liquid level of the chilling chamber are improved, and the probability of fault stopping possibly caused by the problems is reduced.
(3) The utility model discloses the one-level that increases is moist and cyclone, and the engineering realization degree of difficulty is low, and the reliability is high.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment 1 of a syngas scrubbing system adapted to severe operating conditions according to the present invention;
FIG. 2 is a schematic structural diagram of embodiment 2 of a syngas scrubbing system adapted to severe operating conditions according to the present invention;
FIG. 3 is a flow chart illustrating the steps of a method of operating a syngas scrubbing system adapted to harsh operating conditions of the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-a crude synthesis gas outlet pipe, 2-a first washing water connecting pipe, 3-a first washer outlet pipe, 4-a cyclone separator outlet pipe, 5-a cyclone separator black water outlet pipe, 6-a second washing water inlet pipe, 7-a second washer outlet pipe, 8-a washing tower outlet pipe, 9-a process washing water inlet pipe, 10-a washing tower black water outlet pipe, 11-a chilling washing water outlet pipe, 12-a gasifier chilling water pipe, 13-a gasifier, 14-a black water treatment system, 01-a first-stage venturi washer, 02-a cyclone separator, 03-a second-stage venturi washer, 04-a washing tower, 05-a water pump, 05A-a chilling water pump and 05B-a washing water pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "bottom," "top," "side," "inner," and the like are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the components or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
Example 1:
referring to fig. 1, the syngas scrubbing system adapted to harsh operating conditions of the present invention includes a gasification furnace 13, a black water treatment system 14, a first-stage venturi scrubber 01, a cyclone separator 02, a second-stage venturi scrubber 03, a scrubbing tower 04, and a water pump 05;
the water pump 05 adopts an independent chilling washing water pump; the water pump 05 is used for pressurizing process washing water, and the water pump 05 is communicated with the second-stage Venturi scrubber 03 through a second washing water inlet pipe 6, communicated with the first-stage Venturi scrubber 01 through a first washing water connecting pipe 2 and communicated with the gasification furnace 13 through a gasification furnace chilling water pipe 12;
the first-stage venturi scrubber 01 is used for primarily wetting the crude synthesis gas from the gasification furnace 13, and the first-stage venturi scrubber 01 is communicated with the gasification furnace 13 through a crude synthesis gas outlet pipe 1 and communicated with the cyclone separator 02 through a first scrubber outlet pipe 3;
the cyclone separator 02 is used for preliminarily removing solids in the crude synthesis gas, the top of the cyclone separator 02 is communicated with the side part of the second-stage venturi scrubber 03 through a cyclone separator air outlet pipe 4, and the bottom of the cyclone separator 02 is communicated with a black water treatment system 14 through a cyclone separator black water outlet pipe 5;
the second-stage venturi scrubber 03 is used for secondarily wetting the crude synthesis gas, and the second-stage venturi scrubber 03 is communicated with the side part of the washing tower 04 through a second scrubber air outlet pipe 7;
the washing tower 04 is used for washing the synthesis gas to remove the solid participating in the synthesis gas, the top of the washing tower 04 is communicated with a washing tower gas outlet pipe 8, the bottom of the washing tower 04 is communicated with a black water treatment system 14 through a washing tower black water outlet pipe 10, and the side part of the low water level is communicated with a water pump 05 through a washing tower bottom chilling washing water outlet pipe 11; the side of the washing tower 04 is provided with a process washing water inlet pipe 9.
Wherein, 3 process washing water inlet pipes 9 are arranged.
Wherein, a tower tray and a demister are arranged in the washing tower 04.
As shown in fig. 3, a method for operating a syngas scrubbing system that is adapted to harsh operating conditions includes the steps of:
s01, primary wetting: the synthesis gas in the gasification furnace 13 enters a first-stage venturi scrubber 01 to be mixed with washing water conveyed by a water pump 05 for wetting, and then enters a cyclone separator 02 through a first scrubber air outlet pipe 3;
s02, secondary wetting: in the cyclone separator 02, most of liquid and solid carried in the synthesis gas are separated under the action of centrifugal force, black water at the bottom of the cyclone separator 02 is conveyed to a black water treatment system 14 through a cyclone separator black water outlet pipe 5, and the synthesis gas and washing water are conveyed to a second-stage venturi scrubber 03 through a cyclone separator air outlet pipe 4 and a second washing water inlet pipe 6 to be mixed, namely, secondarily wetted; the obtained synthesis gas after secondary wetting enters a washing tower 04 through a second scrubber gas outlet pipe 7;
s03, washing and removing solids: the synthetic gas is further washed by countercurrent contact between a tower tray and a process washing water inlet pipe 9 in a washing tower 04, most liquid drops are removed through a demister, the synthetic gas which basically does not contain solids is output outwards through a washing tower outlet pipe 8, and the bottom of the washing tower 04 is communicated with a black water treatment system 14 and a water pump 05 through a washing tower black water outlet pipe 10 and a chilling washing water outlet pipe 11 respectively;
s04, chilled wash water supply: washing water in the chilling washing water outlet pipe 11 is pressurized by the water pump 05 and then is recycled in three parts, one part of the washing water is communicated with the gasification furnace 13 through the gasification furnace chilling water pipe 12 to supply stress cold water, one part of the washing water is transmitted to the first-stage Venturi scrubber 01 through the first washing water connecting pipe 2, and the other part of the washing water is transmitted to the second-stage Venturi scrubber 03 through the second washing water inlet pipe 6;
in the embodiment, a part of black water at the bottom of the washing tower 04 is used as washing water of the first-stage Venturi scrubber 01 and the second-stage Venturi scrubber and is recycled in the system, and if the water quantity of the part is insufficient, a part of the washing water is supplied by the process washing water inlet pipe 9 to be used as water replenishing of the two-stage Venturi scrubber.
Example 2:
as shown in FIG. 2, the present embodiment is different from embodiment 1 in that a water pump set consisting of a chilling water pump 05A and a washing water pump 05B is adopted as a water pump 05, and the flow of the working method is the same as that of embodiment 1;
one path of the chilling water pump 05A is a chilling water pump specially connected with the gasification furnace 13 so as to ensure high stability of chilling water flow; the other path of the washing water pump 05B is a washing water pump specially connected with the first-stage Venturi scrubber 01 and the second-stage Venturi scrubber 03.
In this embodiment, the black water outlet pipe 5 of the cyclone at the bottom of the cyclone 02 is discharged to the black water treatment system 14 for further treatment. Based on the consideration of the optimal utilization of the water balance of the system, part or all of the black water at the bottom of the cyclone separator returns to the gasification furnace 13 through the black water outlet pipe 5 of the cyclone separator.
If the cyclone 02 is arranged to generate enough potential difference, the black water 5 at the bottom of the cyclone can automatically flow back to the gasification furnace; if there is not enough head difference, it is considered to provide a booster pump.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims (3)
1. A syngas washing system adapting to harsh working conditions is characterized by comprising a gasification furnace (13), a black water treatment system (14), a first-stage Venturi scrubber (01), a cyclone separator (02), a second-stage Venturi scrubber (03), a washing tower (04) and a water pump (05);
the water pump (05) adopts an independent chilling washing water pump or a water pump group consisting of a chilling water pump (05A) and a washing water pump (05B); the water pump (05) is used for pressurizing process washing water, and the water pump (05) is communicated with the second-stage Venturi scrubber (03) through a second washing water inlet pipe (6), communicated with the first-stage Venturi scrubber (01) through a first washing water connecting pipe (2) and communicated with the gasification furnace (13) through a gasification furnace chilling water pipe (12);
the first-stage Venturi scrubber (01) is used for primarily wetting the crude synthesis gas from the gasification furnace (13), and the first-stage Venturi scrubber (01) is communicated with the gasification furnace (13) through a crude synthesis gas outlet pipe (1) and communicated with the cyclone separator (02) through a first scrubber outlet pipe (3);
the cyclone separator (02) is used for preliminarily removing solids in the crude synthesis gas, the top of the cyclone separator (02) is communicated with the side part of the second-stage Venturi scrubber (03) through a cyclone separator air outlet pipe (4), and the bottom of the cyclone separator (02) is communicated with a black water treatment system (14) through a cyclone separator black water outlet pipe (5);
the second-stage Venturi scrubber (03) is used for secondarily wetting the raw synthesis gas, and the second-stage Venturi scrubber (03) is communicated with the side part of the scrubbing tower (04) through a second scrubber gas outlet pipe (7);
the washing tower (04) is used for washing the synthesis gas to remove the solid participating in the synthesis gas, the top of the washing tower (04) is communicated with a washing tower gas outlet pipe (8), the bottom of the washing tower (04) is communicated with a black water treatment system (14) through a washing tower black water outlet pipe (10), and the side part of the low water level is communicated with a water pump (05) through a washing tower bottom chilling washing water outlet pipe (11); and a process washing water inlet pipe (9) is arranged on the side part of the washing tower (04).
2. A syngas scrubbing system adapted to severe service conditions according to claim 1, wherein there are at least 2 process scrubbing water inlet pipes (9).
3. A syngas scrubbing system adapted to severe service conditions in accordance with claim 1 wherein said scrubber tower (04) is provided with trays and demister.
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| CN201921780137.8U CN211079062U (en) | 2019-10-21 | 2019-10-21 | Synthetic gas washing system suitable for harsh working conditions |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110591766A (en) * | 2019-10-21 | 2019-12-20 | 空气化工产品神华(上海)气化技术有限公司 | Synthetic gas washing system adaptive to harsh working conditions and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110591766A (en) * | 2019-10-21 | 2019-12-20 | 空气化工产品神华(上海)气化技术有限公司 | Synthetic gas washing system adaptive to harsh working conditions and working method thereof |
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Address after: 200000 Room 303, No. 88, Lane 887, Zuchongzhi Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: Air chemical products (Shanghai) gasification technology Co.,Ltd. Address before: Building 51, 1000 zhangheng Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee before: Shenhua (Shanghai) gasification technology Co.,Ltd. |