CN106621721B - Integrated gas purification device and gas purification engineering vehicle - Google Patents
Integrated gas purification device and gas purification engineering vehicle Download PDFInfo
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- CN106621721B CN106621721B CN201710080616.8A CN201710080616A CN106621721B CN 106621721 B CN106621721 B CN 106621721B CN 201710080616 A CN201710080616 A CN 201710080616A CN 106621721 B CN106621721 B CN 106621721B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
- C10L2290/541—Absorption of impurities during preparation or upgrading of a fuel
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
Abstract
An integrated gas purification device belongs to the field of gas purification, and comprises a prying seat, and an absorption tower, a regeneration tower and a lean liquid pump which are integrally arranged on the prying seat. The integrated gas purifying device strictly controls the size of each component, integrates the components on the prying seat, completely realizes all functions of the impurity gas removing device, can be repeatedly used, and avoids waste of equipment. The device is convenient to transport, can be directly transported to an operation site for operation, and avoids complex installation links on the site. And it saves space, can adapt to the operation under any narrow environment. The invention also provides a gas purification engineering vehicle which comprises the integrated gas purification device, adopts an integrated design, is convenient to use, can timely perform gas purification operation on site, and can timely evacuate after the operation is completed, so that the repeated use of equipment is realized.
Description
Technical Field
The invention relates to the field of gas purification, in particular to an integrated gas purification device and a gas purification engineering vehicle.
Background
Natural gas is a clean and environment-friendly excellent energy source, and carbon dioxide generated during combustion is less than other fossil fuels, so that the greenhouse effect is lower. However, the composition of natural gas produced from a mineral reserve is very complex and contains H in addition to various hydrocarbon compounds 2 S，CO 2 And acid impurity gases. These acidic impurity gases, when mixed with water, form an acid liquor that can cause severe corrosion to natural gas transportation pipelines and associated equipment. Therefore, it is necessary to deacidify natural gas.
The common acid impurity gas removal device mainly comprises an absorption tower, a regeneration tower, a reboiler, a lean solution pump and other devices such as a raw material gas filter, a product gas filter, an impurity gas cooler, an impurity gas separator, a reflux pump, a lean solution cooler and the like. In the prior art, the heights of the absorption tower and the regeneration tower reach more than 10m, and the size is too large, so that the absorption tower and the regeneration tower are difficult to integrate with other equipment on the pry seat. For easy dismounting, usually with absorption tower and regeneration tower fixed mounting, with other parts integration on sled seat again, with sled seat and absorption tower and regeneration tower connection during the in-service use can. However, for some small-scale gas wells, the gas production period is often not too long, and the devices such as the absorption tower, the regeneration tower and the like are fixedly installed, so that great waste of equipment is necessarily caused. The difficulty in reducing the size of the absorber and the regenerator to such a size that they can be skid-mounted is great, and it is not simply possible to reduce the ratio of the absorber to the regenerator. The tower height is reduced blindly, and only the removal effect of acid impurity gas is reduced.
Disclosure of Invention
The invention aims to provide an integrated gas purifying device which integrates an absorption tower and a regeneration tower on a prying seat, saves space and is convenient to install and transport.
The invention further aims to provide a gas purification engineering vehicle which comprises the integrated gas purification device, is convenient to use, can timely perform gas purification operation on site, and can timely evacuate after the operation is completed, so that the equipment can be reused.
Embodiments of the present invention are implemented as follows:
an integrated gas cleaning device comprising:
an absorption tower comprising a feed gas inlet and a rich liquid outlet at the bottom thereof, and a product gas outlet and a lean liquid inlet at the top thereof;
a regeneration tower including a rich liquid inlet and an impurity gas outlet at the top thereof, and a lean liquid outlet and a steam inlet at the bottom thereof; the steam inlet is communicated with the reboiler, the rich liquid inlet is communicated with a rich liquid outlet of the absorption tower, and the lean liquid outlet is communicated with a lean liquid inlet of the absorption tower through a lean liquid pump;
the skid seat, the absorption tower, the regeneration tower and the lean solution pump are arranged on the skid seat.
Further, in other preferred embodiments of the present invention, the feed gas inlet, the rich liquid outlet, the product gas outlet, and the lean liquid inlet are all located on the side wall of the absorber.
Further, in other preferred embodiments of the present invention, the absorption tower further comprises a gas distributor located inside the absorption tower and connected to the raw gas inlet, wherein the gas distributor is in a straight pipe shape, and a plurality of exhaust holes penetrating through the pipe wall of the gas distributor are distributed on the gas distributor along the axial direction of the gas distributor, and the plurality of exhaust holes are arranged towards the top of the absorption tower.
Further, in other preferred embodiments of the present invention, the absorption tower further comprises a liquid distributor located inside the absorption tower and connected to the lean liquid inlet, the liquid distributor comprising a spray pipe and a baffle, the spray pipe comprising a plurality of nozzles directed toward the top of the absorption tower, the baffle being located between the spray pipe and the top of the absorption tower and separating the spray pipe from the top of the absorption tower, the baffle comprising a stop surface facing the spray pipe for blocking liquid sprayed from the nozzles and a guide surface located on both sides of the stop surface and inclined toward the spray pipe for further dispersing the blocked liquid.
Further, in other preferred embodiments of the present invention, the reboiler is located at the bottom of the regeneration tower and is integrally formed with the regeneration tower.
Further, in other preferred embodiments of the present invention, the rich liquid inlet, the impurity gas outlet and the lean liquid outlet are all located at the side wall of the regeneration tower.
Further, in other preferred embodiments of the present invention, the specific surface area of the absorption tower and the regeneration tower is greater than 200m 2 /m 3 Is a filler of (a).
Further, in other preferred embodiments of the present invention, the integrated gas purification apparatus further comprises a raw gas filter and a product gas filter mounted on the sled base, wherein the raw gas filter is connected to the raw gas inlet for pre-purifying the raw gas; the product gas filter is connected with the product gas outlet for separating liquid drops entrained in the product gas.
Further, in another preferred embodiment of the present invention, the integrated gas purification apparatus further includes a lean-rich liquid heat exchanger mounted on the pry seat, wherein a cold side inlet of the lean-rich liquid heat exchanger is connected to a rich liquid outlet, a cold side outlet is connected to a rich liquid inlet, a hot side inlet is connected to a lean liquid outlet, and a hot side outlet is connected to a lean liquid inlet, so as to exchange heat of the lean liquid to the rich liquid.
A gas purification engineering vehicle comprises the integrated gas purification device.
The embodiment of the invention has the beneficial effects that: according to the integrated gas purification device provided by the invention, the absorption tower, the regeneration tower and the reboiler are integrally arranged on the skid seat, so that the whole skid is provided with all functions of the impurity gas removal device, the whole device can be used repeatedly, and the waste of equipment is avoided. The device is convenient to transport, can be directly transported to an operation site for operation, and avoids complex installation links on the site. And it saves space, can adapt to the operation under any narrow environment. The invention further aims to provide a gas purification engineering vehicle which comprises the integrated gas purification device, is of an integrated design, is convenient to use, can timely perform gas purification operation on site, and can timely withdraw after the operation is completed, so that the repeated use of equipment is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of an integrated gas cleaning device according to a first embodiment of the present invention;
fig. 2 is a sectional view of an absorption tower of an integrated gas cleaning device according to a first embodiment of the present invention;
FIG. 3 is a cross-sectional view of a gas distributor of an integrated gas cleaning device according to a first embodiment of the present invention;
FIG. 4 is a schematic view of a nozzle of a liquid distributor of an integrated gas purification device according to a first embodiment of the present invention, from the top of an absorption tower to the bottom;
FIG. 5 is a schematic view of a baffle plate of a liquid distributor of an integrated gas purification device according to a first embodiment of the present invention from the bottom to the top of an absorption tower;
FIG. 6 is a cross-sectional view of a regeneration tower and reboiler of an integrated gas purification apparatus according to a first embodiment of the present invention;
FIG. 7 is a schematic perspective view of an integrated gas purification device according to a second embodiment of the present invention;
fig. 8 is a flowchart of an integrated gas purifying apparatus according to a second embodiment of the present invention.
Icon: 100-an integrated gas purification device; 110-an absorption column; 111-a feed gas inlet; 112-rich liquor outlet; 113-a product gas outlet; 114-lean liquid inlet; 115-a first filler layer; 116-gas distributor; 1161-vent holes; 117-a first liquid distributor; 1171-nozzles; 1172-baffles; 1173-nozzles; 1174-dry tubing; 1175-branch pipes; 1176-stop surfaces; 1177-a flow directing surface; 120-a regeneration tower; 121-rich liquid inlet; 122-impurity gas outlet; 123-lean liquid outlet; 124-steam inlet; 125-a second filler layer; 126-a second liquid distributor; 130-reboiler; 140-lean liquid pump; 150-prying the base; 200-an integrated gas purification device; 210-a feed gas filter; 220-a product gas filter; 230-a lean-rich liquid heat exchanger; 240-lean liquor cooler; 250-impurity gas cooler; 260-impurity gas separator; 270-a lean liquid storage tank; 280-lean liquid filter; 290-reflux pump.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
First embodiment
The present embodiment provides an integrated gas cleaning apparatus 100, as shown in fig. 1, which includes a skid (not shown), and an absorption tower 110, a regeneration tower 120, a reboiler 130, and a lean liquid pump 140 mounted on the skid. In order to meet the national restrictions on land transportation size, the entire integrated gas purification device 100 is no longer than 15m, no wider than 3m, and no taller than 3.5m.
As shown in fig. 2, the absorber column 110 is generally cylindrical in shape and is the primary device for treating the feed gas entering the apparatus, and is typically greater than 10m in height. In the embodiment of the present invention, in order to reduce the height of the absorption tower 110, a design without a skirt is adopted, and the absorption tower 110 is directly mounted on the pry seat, so that the space occupied by the skirt is saved. It should be noted that, in other preferred embodiments of the present invention, the integrated gas purification apparatus 100 may comprise a plurality of absorption towers 110, and the plurality of absorption towers 110 are connected in series or in parallel. Preferably, the gas passages in the plurality of absorption towers 110 may be connected in series, and the liquid passages may be connected in parallel. The series gas passages allow the feed gas to be purified sequentially through the plurality of absorber towers 110 to obtain a purer product gas.
As shown in fig. 2, a feed gas inlet 111 and a rich liquid outlet 112 are provided at the bottom of the absorption tower 110, while a product gas outlet 113 and a lean liquid inlet 114 are provided at the top of the absorption tower 110. The raw material gas enters the absorption tower 110 from a raw material gas inlet 111 at the bottom of the absorption tower 110, and moves from bottom to top. The lean liquid for absorbing the impurity gas enters from the lean liquid inlet 114 at the top of the absorption tower 110 and moves from top to bottom. The raw material gas and the lean solution are collected in a first packing layer 115 in the middle of the absorption tower 110, the lean solution absorbs the impurity gas in the raw material gas to form a rich solution rich in the impurity gas, and the rich solution is discharged from a rich solution outlet 112 at the bottom of the absorption tower 110, and meanwhile, the raw material gas is converted into product gas after the impurity gas is absorbed, and is formed at the top of the absorption tower 110And a product gas outlet 113 at the portion. Wherein, the raw material gas inlet 111, the rich liquid outlet 112, the product gas outlet 113 and the lean liquid inlet 114 are all arranged on the side wall of the absorption tower 110 and are connected with other devices through connecting pipes. The connection pipes are arranged to extend toward the lateral direction of the absorption tower 110 as much as possible, and do not exceed the height of the top of the absorption tower 110, so as to avoid increasing the overall height of the integrated gas purification device 100. Further, the specific surface area of the filler filled in the first filler layer 115 is greater than 200m 2 /m 3 Such as BX500, CY700, etc., to ensure that the absorption effect of the absorption column 110 is maintained while the height of the absorption column 110 is reduced.
As shown in fig. 2 and 3, the absorption column 110 further includes a gas distributor 116 located inside thereof and connected to the raw gas inlet 111. The gas distributor 116 has a straight pipe shape and extends from the feed gas inlet 111 to a side wall opposite to the feed gas inlet 111 in the diameter direction of the absorption column 110. It should be noted that in other preferred embodiments of the present invention, the gas distributor 116 may be curved, including "S" shaped tube, "U" shaped tube, etc., and may be a single tube or a plurality of tubes arranged side by side. Further, a plurality of exhaust holes 1161 penetrating through the pipe wall are distributed on the gas distributor 116 along the axial direction thereof, the plurality of exhaust holes 1161 are inclined towards the top of the absorption tower 110 and form an included angle α with the axial line direction of the absorption tower 110, the included angle α is 30-80 °, in other words, the gas distributor 116 can jet gas towards the top of the absorption tower 110. In this embodiment, the straight tubular gas distributor 116 includes two gas vent groups (not labeled), each gas vent group includes a plurality of gas vents 1161 arranged at equal intervals along the axis of the gas distributor 116, the vertical plane passing through the axis of the gas distributor 116 is taken as a reference plane, the two gas vent groups are arranged on two sides of the reference plane, and the direction of each gas vent 1161 maintains an angle of 45-80 ° with the reference plane. In the prior art, the vent hole 1161 is generally downward, so that a certain safety distance needs to be maintained between the gas distributor 116 and the liquid surface at the bottom of the absorption tower 110 in order to avoid the influence of the raw gas discharged from the vent hole 1161 on the liquid surface at the bottom of the absorption tower 110. The inclined upward vent 1161 prevents the raw gas from impacting the liquid surface below the gas distributor 116, so that the distance between the gas distributor and the bottom of the absorption tower 110 can be set closer, thereby reducing the height of the whole absorption tower 110. Further, the shape of the exhaust hole 1161 is not particularly limited, and may be provided in a circular shape, an elliptical shape, a bar shape, or even an irregular shape, as appropriate.
As shown in fig. 2 and 4, the absorption tower 110 further includes a first liquid distributor 117 located inside thereof and connected to the lean liquid inlet 114, the first liquid distributor 117 being located above the first packing layer 115. In the prior art, the first liquid distributor 117 comprises a plurality of spray pipes 1171, the spray pipes 1171 are provided with spray nozzles 1173 pointing to the bottom of the absorption tower 110, and the lean liquid is sprayed downward by the spray nozzles 1173 to form a substantially conical spraying area, so that the lean liquid discharged from the spray nozzles 1173 can be sufficiently dispersed, i.e. the bottom surface of the cone covers more areas, and a sufficient spraying distance needs to be maintained between the first liquid distributor 117 and the first packing layer 115. In one embodiment of the integrated gas cleaning device 100, the first liquid distributor 117 includes a nozzle 1171 and a baffle 1172, the nozzle 1171 includes a plurality of nozzles 1173 directed to the top of the absorber 110, and the baffle 1172 is located between the nozzle 1171 and the top of the absorber 110 and separates the nozzle 1171 from the top of the absorber 110. It should be noted that the baffle 1172 does not completely isolate the space above and below the baffle 1172, and a gap (not shown) through which the gas passes should be provided on the baffle 1172, and the number of gaps may be single or multiple, and the nozzles 1173 may be staggered. The liquid stream ejected from the nozzle 1173 in the top direction falls back to the first packing layer 115 after bouncing off the baffle 1172, and the lean liquid is sufficiently dispersed by bouncing off the baffle from a plurality of different angles, whereby the distance between the first packing layer 115 and the first liquid distributor 117 is shortened, so that the overall height of the absorption tower 110 is further reduced.
As shown in fig. 4, the spout 1171 preferably includes a main pipe 1174 connected to the lean liquid inlet 114 and extending horizontally to a side wall of the lean liquid inlet 114 opposite to the side wall, and a plurality of branch pipes 1175 provided on a wall of the main pipe 1174 and extending laterally of the main pipe 1174 in a horizontal plane. Branch 1175 may be held perpendicular to main 1174 or may be inclined at an angle. Branch 1175 may be parallel to each other or may be disposed in a cross-over arrangement. It should be noted that in other preferred embodiments of the present invention, the number of main 1174 may be multiple, with the plurality of main 1174 and plurality of branch 1175 forming an interdigitated grid.
As shown in fig. 5, the baffle 1172 includes a stop surface 1176 and a flow directing surface 1177, the stop surface 1176 having a shape corresponding to the shape of the spout 1171, and being maintained directly above the spout 1171 and separating the spout 1171 from the top of the absorber 110 for blocking liquid from the nozzle 1173. The flow surfaces 1177 are located on either side of the stop surface 1176 and are inclined toward the spout 1171 at an angle of 20-45 degrees to the stop surface 1176. The flow surface 1177 may act as a lateral extension of the stop surface 1176 to further increase the area of liquid retained by the flow surface 1176, while the flow surface 1177 may be angled to further disperse the liquid retained by the stop surface 1176.
As shown in fig. 6, the regeneration tower 120 is an apparatus for removing impurity gas from the rich liquid and regenerating the lean liquid, and is also a cylinder as a whole. The regeneration tower 120 is provided at the top with a rich liquid inlet 121 and an impurity gas outlet 122, and at the bottom with a lean liquid outlet 123 and a steam inlet 124. The steam inlet 124 is connected to the reboiler 130 through a connection pipe, the reboiler 130 heats the liquid therein and generates steam, and the steam enters the regeneration tower 120 from the steam inlet 124 at the bottom of the regeneration tower 120 and moves from bottom to top. The rich liquid enters from the rich liquid inlet 121 at the top of the regeneration tower 120 and moves from top to bottom. The steam and the rich liquid are collected in the second packing layer 125 in the middle of the regeneration tower 120, the steam heats and strips the rich liquid, brings out the dissolved impurity gas therein, and is discharged from the impurity gas outlet 122 at the top of the regeneration tower 120, and at the same time, the rich liquid is regenerated into lean liquid after absorbing the impurity gas, and is discharged from the lean liquid outlet 123 at the bottom of the regeneration tower 120. The specific surface area of the filler filled in the second filler layer 125 is greater than 200m 2 /m 3 Such as BX500, CY700, etc., to ensure that the regeneration effect of the regeneration tower 120 is maintained while the height of the regeneration tower 120 is reduced
As shown in fig. 6, in the present embodiment, the reboiler 130 and the regeneration tower 120 are preferably integrally formed, and the reboiler 130 is directly installed at the bottom of the regeneration tower 120, and the lean solution outlet 123 is moved to the bottom of the reboiler 130. The steam formed by heating in the reboiler 130 may directly enter the regeneration tower 120 from the bottom of the regeneration tower 120, and the lean liquid formed in the regeneration tower 120 is discharged from the bottom of the reboiler 130. Such a design eliminates the skirt of the regeneration tower 120, increasing space utilization. Preferably, the top of the regeneration tower 120 adopts a flat-cap seal structure, thereby further reducing the overall height of the regeneration tower 120.
As shown in fig. 1 and 6, the rich liquid inlet 121, the impurity gas outlet 122, and the lean liquid outlet 123 are provided on the side wall of the regeneration tower 120. The rich liquid inlet 121 and the rich liquid outlet 112 on the absorption tower 110 are communicated through a connecting pipe, and the lean liquid outlet 123 passes through the lean liquid pump 140 and is communicated with the lean liquid inlet 114 on the absorption tower 110 through a connecting pipe, so that the recycling of alkali liquor is realized. Likewise, all of the connection pipes are arranged to extend as far as possible toward the lateral direction of the regeneration tower 120, not to exceed the height of the top of the regeneration tower 120, so as to avoid increasing the overall height of the integrated gas purification device 100.
As shown in fig. 6, the regeneration tower 120 further includes a second liquid distributor 126 disposed inside thereof and connected to the rich liquid inlet 121, the second liquid distributor 126 being disposed above the second packing layer 125. The second liquid distributor 126 has the same configuration as the first liquid distributor 117 to shorten the installation distance between the second packing layer 125 and the second liquid distributor 126, so that the overall height of the regeneration tower 120 is further reduced.
As shown in fig. 1, in actual use, the raw material gas is fully contacted with the lean solution in the absorption tower 110, and the impurity gas is absorbed by the lean solution and then discharged from the absorption tower 110 for subsequent treatment or canning and storage. The lean solution is discharged from the absorption tower 110 into the regeneration tower 120 after absorbing the impurity gas, is mixed with steam in the regeneration tower 120, is stripped by the steam to remove the impurity gas, and is regenerated into lean solution, and is returned to the absorption tower 110 for recycling through the lean solution pump 140. The whole integrated gas purification device 100 completely realizes the gas purification function on a prying seat with the length of not more than 15m and the width of not more than 3m, and the whole height is controlled within 3.5m through creative improvement based on self experience of the inventor, so that the whole size is within the limit range of land transportation, and the integrated gas purification device can be conveniently transported, installed and used.
Second embodiment
The present embodiment provides an integrated gas cleaning device 200, as shown in fig. 7, which includes the entire structure of the integrated gas cleaning device 100 provided in the first embodiment, and is further optimized on the basis thereof.
As shown in fig. 7 and 8, the integrated gas cleaning apparatus 200 further includes a raw gas filter 210 and a product gas filter 220 mounted on the sled base 150. The feed gas filter 210 is connected to the feed gas inlet 111 provided in the absorption tower 110 for pre-purifying the feed gas. The product gas filter 220 is connected to the product gas outlet 113 located on the absorber tower 110 for further purification of the resulting product gas.
As shown in fig. 7 and 8, the integrated gas cleaning apparatus 200 further includes a lean-rich liquid heat exchanger 230 mounted on the skid 150. The lean-rich liquid heat exchanger 230 has a cold side inlet connected to the rich liquid outlet 112 provided in the absorption tower 110, a cold side outlet connected to the rich liquid inlet 121 provided in the regeneration tower 120, a hot side inlet connected to the lean liquid outlet 123 provided in the regeneration tower 120, and a hot side outlet connected to the lean liquid inlet 114 provided in the absorption tower 110. The lean solution regenerated from the regeneration tower 120 has a high temperature, and in order to secure the absorption effect of the lean solution in the absorption tower 110, it is necessary to cool down the lean solution. Conversely, the rich liquid discharged from the absorption tower 110 has a low temperature, and can be just used to cool down the lean liquid, so as to improve the energy utilization rate of the whole integrated gas purification apparatus 200.
Preferably, as shown in fig. 7 and 8, in order to further cool the lean solution, the integrated gas purification apparatus 200 further includes a lean solution cooler 240 mounted on the skid 150, and the lean solution cooler 240 is connected between the lean-rich solution heat exchanger 230 and the lean solution inlet 114 on the absorption tower 110, for further cooling the lean solution.
Meanwhile, as shown in fig. 7 and 8, in order to treat the impurity gas discharged from the regeneration tower 120, the integrated gas purification apparatus 200 further includes an impurity gas cooler 250 and an impurity gas separator 260 mounted on the sled base 150, the impurity gas cooler 250 being connected to the impurity gas outlet 122 of the regeneration tower 120 for cooling the impurity gas discharged from the regeneration tower 120 and delivering the cooled impurity gas to the impurity gas separator 260. The impurity separator 260 performs gas-liquid separation on the impurity gas, recovers moisture therein, and realizes recycling of the impurity gas.
As shown in fig. 7 and 8, the integrated gas cleaning apparatus 200 further includes a lean solution storage tank 270 mounted on the skid 150, the lean solution storage tank 270 being connected to the lean solution pump 140 and being fed to the absorption tower 110 through the lean solution pump 140, and the lean solution being consumed can be added.
Further, the lean solution is passed through the lean solution filter 280 before entering the lean solution pump 140, and the lean solution filter 280 can remove impurities in the lean solution delivered from the lean solution storage tank 270 or the regeneration tower 120, so as to increase the stability of the lean solution.
Preferably, as shown in fig. 7 and 8, the integrated gas cleaning apparatus 200 further includes a reflux pump 290 mounted on the skid 150, the reflux pump 290 being connected to the impurity gas separator 260, recovering the liquid obtained after separating the impurity gas, and introducing it into the regeneration tower 120 from the top of the regeneration tower 120 to regenerate it into a lean liquid in the regeneration tower 120.
The working principle of the integrated gas purification device 200 according to the present embodiment is substantially similar to that of the integrated gas purification device 100 according to the first embodiment, and if it is unclear, reference may be made to the first embodiment, and details thereof will not be repeated.
In summary, according to the integrated gas purifying device provided by the invention, the absorption tower and the regeneration tower are integrally arranged on the skid seat, so that the whole skid completely has all functions of the impurity gas removing device, and the whole device can be repeatedly used, thereby avoiding waste of equipment. The device is convenient to transport, can be directly transported to an operation site for operation, and avoids complex installation links on the site. And it saves space, can adapt to the operation under any narrow environment. The invention further aims to provide a gas purification engineering vehicle which comprises the integrated gas purification device, is of an integrated design, is convenient to use, can timely perform gas purification operation on site, and can timely withdraw after the operation is completed, so that the repeated use of equipment is realized.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An integrated gas cleaning device, comprising:
an absorption tower comprising a feed gas inlet and a rich liquid outlet at the bottom thereof, and a product gas outlet and a lean liquid inlet at the top thereof;
a regeneration tower including a rich liquid inlet and an impurity gas outlet at the top thereof, and a lean liquid outlet and a steam inlet at the bottom thereof; the steam inlet is communicated with a reboiler, the rich liquid inlet is communicated with the rich liquid outlet of the absorption tower, and the lean liquid outlet is communicated with the lean liquid inlet of the absorption tower through a lean liquid pump;
the absorption tower, the regeneration tower and the lean liquid pump are arranged on the prying seat;
the feed gas inlet, the rich liquid outlet, the product gas outlet and the lean liquid inlet are all positioned on the side wall of the absorption tower;
the absorption tower further comprises a liquid distributor which is positioned in the absorption tower and is connected with the lean liquid inlet, the liquid distributor comprises a spray pipe and a baffle, the spray pipe comprises a plurality of spray nozzles which are directed to the top of the absorption tower, the baffle is positioned between the spray pipe and the top of the absorption tower and separates the spray pipe from the top of the absorption tower, the baffle comprises a stopping surface and a flow guiding surface, the stopping surface is opposite to the spray pipe and is used for stopping liquid sprayed from the spray nozzle, and the flow guiding surface is positioned at two sides of the stopping surface and is inclined towards the spray pipe and is used for further dispersing the stopped liquid;
the length of the whole integrated gas purifying device is not more than 15m, the width is not more than 3m, and the height is not more than 3.5m.
2. The integrated gas cleaning apparatus according to claim 1, wherein the absorption tower further comprises a gas distributor which is located inside the absorption tower and is connected to the raw gas inlet, the gas distributor is in a straight pipe shape, a plurality of exhaust holes penetrating through the pipe wall of the gas distributor are distributed on the gas distributor along the axis direction of the gas distributor, and the plurality of exhaust holes are obliquely arranged towards the top direction of the absorption tower.
3. The integrated gas cleaning apparatus according to claim 1, wherein the reboiler is located at the bottom of the regeneration tower and is integrally formed with the regeneration tower.
4. The integrated gas cleaning apparatus according to claim 3, wherein the rich liquid inlet, the impurity gas outlet, and the lean liquid outlet are all located on a side wall of the regeneration tower.
5. The integrated gas cleaning apparatus according to claim 1, wherein the specific surface area of each of the absorption tower and the regeneration tower is greater than 200m 2 /m 3 Is a filler of (a).
6. The integrated gas cleaning apparatus according to claim 1, further comprising a raw gas filter and a product gas filter mounted on the sled base, the raw gas filter being connected to the raw gas inlet for pre-cleaning raw gas; the product gas filter is connected with the product gas outlet and is used for separating liquid drops entrained in the product gas.
7. The integrated gas cleaning apparatus according to claim 1, further comprising a lean-rich liquid heat exchanger mounted on the skid, wherein a cold side inlet of the lean-rich liquid heat exchanger is connected to the rich liquid outlet, a cold side outlet is connected to the rich liquid inlet, a hot side inlet is connected to the lean liquid outlet, and a hot side outlet is connected to the lean liquid inlet to exchange heat of lean liquid to rich liquid.
8. A gas purification engineering vehicle comprising an integrated gas purification apparatus according to any one of claims 1 to 7.
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| CN201710080616.8A CN106621721B (en) | 2017-02-14 | 2017-02-14 | Integrated gas purification device and gas purification engineering vehicle |
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| CN201710080616.8A CN106621721B (en) | 2017-02-14 | 2017-02-14 | Integrated gas purification device and gas purification engineering vehicle |
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