CN110733896A - lump and granular coal pressurized conveying equipment and method - Google Patents
lump and granular coal pressurized conveying equipment and method Download PDFInfo
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- CN110733896A CN110733896A CN201910867421.7A CN201910867421A CN110733896A CN 110733896 A CN110733896 A CN 110733896A CN 201910867421 A CN201910867421 A CN 201910867421A CN 110733896 A CN110733896 A CN 110733896A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/46—Gates or sluices, e.g. rotary wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/36—Arrangements of containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
Abstract
The invention relates to the technical field of pressurized conveying, in particular to kinds of granular coal pressurized conveying equipment and a method.
Description
Technical Field
The invention relates to the technical field of pressurized conveying, in particular to lump and granular coal pressurized conveying equipment and a method.
Background
The coal pressure gasification technology has the advantages of high production efficiency under the conditions of high temperature and high pressure, simple operation, high material utilization rate, capability of flexibly processing various coals and biomasses and the like, meanwhile, the pressure conveying of the lump coal is an essential link for the pressure gasification, and the pressure conveying technology of the coal at the present stage mainly has the following problems:
1. at present, the raw material coal pressurized conveying is basically pulverized coal conveying; the pressure conveying of the lump and granular coal is only used under the low-pressure working condition, and the development of lump coal gasification cannot be met;
2. the cut-off valve for pressure conveying of raw coal adopts a hard seal ball valve and a dome valve, and due to frequent switching, material abrasion and the like under the pressure conveying working condition, the cut-off valve has the problems of jamming, material accumulation, abrasion and the like in the actual application, and the service life of the valve is shortened.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides kinds of lump granular coal pressure conveying equipment and a method.
Specifically, the kinds of lump and granular coal pressurizing and conveying equipment comprises a coal bunker, a gate valve, an upper lock hopper valve, a coal lock hopper and a lower lock hopper valve which are sequentially connected from top to bottom, wherein the coal lock hopper is provided with a pressurizing valve and a pressure release valve.
In the above granular coal pressure conveying equipment, the upper lock hopper valve and the lower lock hopper valve are bidirectional hard seal ball valves.
In the above block granular coal pressure conveying equipment, the upper lock bucket valve and the lower lock bucket valve respectively include two bidirectional hard seal ball valves connected in series.
In the above equipment for conveying lump and granular coal under pressure, the bidirectional hard sealing ball valve comprises a ball body, a valve body and a valve seat; wherein the valve seat comprises a scraper, a graphite ring and a spring from the direction close to the sphere to the outside in sequence.
According to the block and granular coal pressurized conveying equipment, the valve seat and the surface of the ball body are sprayed with WC or Ni600, and the valve body is provided with the purge hole.
In the above block granular coal pressurized conveying equipment, the coal lock hopper is provided with the blow-down valve.
, the method for pressure conveying kinds of lump and granular coal of the present invention is carried out by the above apparatus for pressure conveying lump and granular coal, and comprises the following steps:
(1) closing the lower lock hopper valve and the pressurizing valve, and opening the pressure relief valve to enable the pressure of the coal lock hopper to be normal pressure;
(2) sequentially opening the gate valve and the upper lock hopper valve to enable the lump and granular coal in the coal bunker to enter the coal lock hopper under the action of gravity;
(3) when the material level in the coal lock hopper reaches a threshold value, closing the gate valve, the upper lock hopper valve and the pressure release valve in sequence;
(4) opening the pressurizing valve, and opening the lower lock hopper valve to enable the granular coal to enter the gasification furnace after the pressure in the coal lock hopper reaches a threshold value;
(5) and (3) after discharging is finished, repeating the step (1) and carrying out a lower pressure conveying cycle.
In the pressure conveying method for the lump and granular coal, in the step (4), the pressure in the coal lock hopper is 3.5-8.5 MPa.
The pressure conveying method of the lump granular coal has the grain diameter of 5mm-50 mm.
In the pressure conveying method for the lump and granular coal, the coal lock hopper is provided with the blow-down valve, and in the step (1), the pressure of the coal lock hopper is normal pressure by opening the blow-down valve. The technical scheme of the invention has the following beneficial effects:
(1) according to the block and granular coal pressurized conveying equipment, the gate valve is arranged below the coal bunker, so that the phenomena of friction and material blocking between the ball body of the upper lock bucket valve and the block and granular coal can be effectively avoided, and the service cycle of the upper lock bucket valve is prolonged;
(2) the block and granular coal pressurized conveying equipment adopts the bidirectional hard sealing bucket locking valve with a special structural design, enhances the sealing of the valve , resists fatigue, reduces the abrasion of the valve , prolongs the service cycle and is convenient to maintain;
(3) the block and granular coal pressure conveying method realizes the pressure conveying of the block and granular coal (6mm-50mm block and granular) under high pressure by circularly converting the modes of pressure and pressure reduction through the coal lock hopper, makes up the blank of the high-pressure (3.5-8.5MPa) conveying technology of the block and granular coal at the current stage, and meets the development requirement of the coal gasification of the block and granular coal.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
FIG. 1 is a schematic structural view of a lump and granular coal pressurized conveying apparatus according to the present invention;
fig. 2 is a schematic structural diagram of a bidirectional hard seal ball valve used in the invention.
Wherein, 10 is a block granular coal pressurized conveying device, 11 is a coal bunker, 12 is a gate valve, 13 is an upper lock bucket valve, 14 is a coal lock bucket, 15 is a lower lock bucket valve, 16 is a pressurized valve, 17 is a pressure release valve, and 18 is an emptying valve; 20 is a bidirectional hard seal ball valve 20, 21 is a ball, 22 is a valve body, 23 is a valve seat, 231 is a scraper, 232 is a graphite ring, 233 is a spring, 24 is a C-shaped ring seal, and 25 is a stop pad.
Detailed Description
The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and effects of the invention. The process of the present invention employs conventional methods or apparatus in the art, except as described below. The following noun terms have meanings commonly understood by those skilled in the art unless otherwise specified.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are used to mean, for example, either fixedly or removably connected or physically connected, mechanically or electrically connected, directly or indirectly connected through an intermediary, or communicating between two elements.
In order to meet the development of the block and granular coal pressurizing technology, the invention discloses block and granular coal pressurizing and conveying equipment and a method, which not only effectively solve the problem of pressurizing and conveying of block and granular coal under the working condition of high pressure (3.5-8.5MPa), but also solve the problems of material blocking and material accumulation of a stop valve in the operation process, reduce the abrasion of the valve and prolong the service life of the valve .
Specifically, as shown in fig. 1, the invention discloses kinds of granular coal pressure conveying equipment 10, which comprises a coal bunker 11, a gate valve 12, an upper lock bucket valve 13, a coal lock bucket 14 and a lower lock bucket valve 15 which are sequentially connected from top to bottom, wherein the coal lock bucket 14 is provided with a pressure valve 16 and a pressure relief valve 17.
The coal bunker 11, the gate valve 12, the upper lock bucket valve 13, the coal lock bucket 14 and the lower lock bucket valve 15 are connected through pipelines.
When the coal bunker operates in a material accumulation state, the ball body of the upper lock bucket valve 13 is in direct contact with the lump granular coal, and in order to avoid friction between the ball body of the upper lock bucket valve 13 and the lump granular coal, the gate valve 12 is arranged below the coal bunker 11, so that material blockage can be effectively prevented, and the service life of the upper lock bucket valve 13 is prolonged.
The coal bunker 11 is used for temporarily storing the lump and granular coal, and the invention has no special requirements on the shape and the volume of the coal bunker 11.
The coal lock hopper 14 includes, among other things, a level gauge, a manhole, and a hand hole (not shown).
In preferred embodiments, the upper lock hopper valve 13 and the lower lock hopper valve 15 are two-way hard seal ball valves 20, which can effectively prevent coal particles and coal ash from entering the gap between the ball and the valve body.
The bidirectional hard seal ball valve 20 has the advantages that the flow resistance is minimum, when the full-diameter ball valve is opened, the diameters of a ball body channel, a valve body channel and a connecting pipe are equal and form diameters, a medium can almost flow through without loss, the full-closed ball valve is opened completely, the opening and closing are rapid, compared with a gate valve and a stop valve of the same specification, the ball valve is small in size, light in weight and convenient to install a pipeline.
Specifically, as shown in fig. 2, the bidirectional hard seal ball valve 20 includes a ball 21, a valve body 22, and a valve seat 23; the valve seat 23 comprises a scraper 231, a graphite ring 232 and a spring 233 which are arranged from the direction close to the sphere 21 to the outside in sequence, so that the aggregation of pulverized coal in the sphere is reduced, the sealing is better, and the service cycle is longer.
In addition, the sealing effect of the bucket locking valve can be improved by arranging the spring 233 and the graphite ring 232 in the valve seat 23, and the sealing requirements of pressurization and pressure relief cycle change of the coal lock bucket 14 are further facilitated. The scraper 231 arranged on the valve seat 23 can effectively reduce or eliminate the residual coal on the ball 21 from entering the gap between the valve body 22 and the ball 21, prevent the coal from entering upper and lower bearings (not shown), and prolong the service life.
Wherein, the valve seat 23 is designed by bidirectional hard seal, which is more suitable for the cycle change of pressurization and pressure release of the coal lock 14.
it is preferable that the valve seat 23 and the ball 21 be coated with a special alloy, such as WC or Ni600. the special alloy has high hardness and is wear resistant, which can effectively reduce wear and prolong the service life of the bucket lock valve.
, preferably, a purge hole 221 is formed in the middle lower portion of the valve body 22. the purge hole 221 purges a gap between the valve body 22 and the ball 21, so that accumulation of coal ash is reduced, and steps are performed to prolong the service cycle of the bucket locking valve.
preferably, in order to prevent coal from entering the upper and lower bearings of the lock hopper valve, steps increase the service life, and C-shaped sealing rings 24 and thrust pads 25 can be arranged at the positions close to the ball bodies at the two ends of the inner part of the medium inlet and outlet valve body.
In preferred embodiments, to ensure that valve is closed more tightly, the upper and lower lock hopper valves 13 and 15 are two-way hard seal ball valves 20 in series, thereby acting as effective isolation.
In yet other preferred embodiments, the coal lock hopper is provided with a blow valve 18 for equalizing the atmospheric pressure in the coal lock hopper 14 with the ambient air pressure.
Wherein, the pressurization valve 16, the pressure relief valve 17 and the blow-down valve 18 are all arranged above the coal lock hopper 14. And a pressurizing port, a pressure relief port and an emptying port are arranged above the coal lock hopper 14, and are directly connected or connected through pipelines with the pressurizing valve 16, the pressure relief valve 17 and the emptying valve 18 respectively.
Preferably, the coal bunker 11 is provided with two discharge ports, each discharge port is sequentially connected with gate valves 12, upper lock bucket valves 13, coal lock buckets 14 and lower lock bucket valves 15 through pipelines, the lower lock bucket valves 15 are connected with a gas furnace (not coded) through pipelines, wherein the upper parts of the coal lock buckets are connected with a pressurizing valve 16, a pressure relief valve 17 and an emptying valve 18, in the operation process, the two coal lock buckets 14 are alternately filled and decompressed to continuously convey granular coal blocks into the gas furnace, and the pressurizing conveying efficiency of the granular coal blocks is effectively improved.
In addition , the invention also discloses a pressure conveying method for lump and granular coal, which is carried out by adopting the pressure conveying equipment for lump and granular coal and comprises the following steps:
(1) closing the lower lock hopper valve 15 and the pressurizing valve 16, and opening the pressure release valve 17 to make the pressure of the coal lock hopper 14 be normal pressure;
(2) sequentially opening the gate valve 12 and the upper lock hopper valve 13 to enable the lump and granular coal in the coal bunker 11 to enter the coal lock hopper 14 under the action of gravity;
(3) when the material level in the coal lock hopper 14 reaches a threshold value, closing the gate valve 12, the upper lock hopper valve 13 and the pressure release valve 17 in sequence;
(4) opening the pressurizing valve 16 to enable the pressure in the coal lock hopper 14 to reach a threshold value, and then opening the lower lock hopper valve 15 to enable the granular coal to enter the gasification furnace;
(5) and (3) after discharging is finished, repeating the step (1) and carrying out a lower pressure conveying cycle.
In preferred embodiments, in step (4), the pressure in the coal lock hopper 14 is 3.5-8.5MPa, more preferably, the pressure in the coal lock hopper 14 is kept stable by adjusting the opening degree of the pressurizing valve 16 during discharging.
In preferred embodiments, the lump of granular coal has a particle size of 5mm to 50 mm.
In preferred embodiments, the coal lock hopper 14 further comprises a blow valve 18, whereby the pressure of the coal lock hopper 14 is atmospheric through the blow valve.
In most preferred embodiments, the lump and granular coal pressure conveying method of the present invention comprises the steps of:
(1) when the coal lock hopper 14 is in a normal-pressure working condition, closing the lower lock hopper valve 15 and the pressurizing valve 16, and opening the emptying valve 18 to enable the pressure of the coal lock hopper 14 to be normal pressure;
(2) sequentially opening the gate valve 12 and the upper lock hopper valve 13 to enable the lump and granular coal in the coal bunker 11 to enter the coal lock hopper 14 under the action of gravity;
(3) when the material level in the coal lock hopper 14 reaches a threshold value, closing the gate valve 12, the upper lock hopper valve 13 and the blow-down valve 18 in sequence;
(4) opening the pressurizing valve 16, filling lock hopper gas into the coal lock hopper 14 until the pressure in the coal lock hopper 14 reaches a threshold value (3.5-8.5MPa), opening the lower lock hopper valve 15, pushing the lump granular coal (5mm-50mm lump and granular) to move by means of gravity and gas scouring, and entering a gasification furnace (not coded) through a pipeline and the lower lock hopper valve 15; during discharging, the pressure in the coal lock hopper is kept stable through the opening degree of the pressurizing valve 16.
(5) After the discharging of the granular coal in the coal lock hopper 14 is finished, the lower lock hopper valve 15 is closed, then the pressure release valve 17 is opened slowly, the pressure in the coal lock hopper 14 is reduced to be in a normal pressure state, and then the pressure conveying circulation is carried out for times.
The invention relates to a pressure conveying method for lump and granular coal, which circularly changes the modes of pressurization and depressurization through a coal lock hopper 14 so as to finish the processes of normal-pressure feeding and high-pressure discharging conveying. The invention realizes the pressurized conveying of the lump and granular coal under high pressure, makes up the blank of the high-pressure conveying technology of the lump and granular coal at the present stage, and meets the development requirement of the lump and granular coal gasification.
The invention is further illustrated by the following example , but is not intended to be limited thereby in the scope of the examples described.
Example 1
As shown in fig. 1, the block and granular coal pressure conveying equipment 10 of the invention comprises a coal bunker 11, a coal lock hopper 14, a pressure valve 16, a pressure release valve 17, a gate valve 12, an upper lock hopper valve 13 and a lower lock hopper valve 15; the coal bunker 11 is positioned at the uppermost end of the whole granular coal pressurized conveying device 10, the lower end of the coal bunker 11 is sequentially connected with a gate valve 12 and an upper lock hopper valve 13 (comprising two bidirectional hard seal ball valves 20 connected in series), and a coal lock hopper 14 is connected below the upper lock hopper valve 13; the upper end of the coal lock hopper 14 body is respectively connected with a pressure valve 16, a pressure release valve 17 and an emptying valve 18; the lower end of the coal lock hopper 14 is connected with a lower lock hopper valve 15 (comprising two bidirectional hard seal ball valves 20 connected in series).
(1) When no lump granular coal exists in the coal lock hopper, the pressure release valve 17 is opened to ensure that the coal lock hopper 14 is kept in a normal pressure state in the charging process; closing the lower lock hopper valve 15 and the pressurizing valve 16, sequentially opening the gate valve 12 and the upper lock hopper valve 13, and allowing the lump coal in the storage bin 11 to enter the coal lock hopper 14 by virtue of the self gravity; when the coal lock hopper 14 reaches the required material level, the gate valve 12 is closed firstly, mainly to avoid the phenomena of material accumulation and material blockage of the upper lock hopper valve 13, then the upper lock hopper valve 13 is closed, and finally the pressure release valve 17 is closed;
(2) opening a pressurizing valve 16, and charging gas into the coal lock hopper 14 until the pressure in the coal lock hopper 14 is increased to the required pressure of 3.5-8.5 MPa;
(3) the lower lock hopper valve 15 is opened, the block granular coal enters a gasification furnace (not coded) from the coal lock hopper 14 by means of self gravity, and the pressure in the coal lock hopper 14 must be kept stable in the discharging process and can be adjusted by the opening of the pressurizing valve 16;
(4) after the discharging of the granular coal in the coal lock hopper 14 is finished, the lower lock hopper valve 15 is closed, then the pressure release valve 17 is opened slowly, the pressure in the coal lock hopper is reduced to be in a normal pressure state, and the circulation of the pressure conveying of the lower wheels is carried out.
Example 2
As shown in fig. 1, the block and granular coal pressure conveying device 10 of the present invention includes a coal bunker 11, a coal lock hopper 14, a pressure valve 16, a pressure release valve 17, an emptying valve 18, a gate valve 12, an upper lock hopper valve 13, and a lower lock hopper valve 15; the coal bunker 11 is positioned at the uppermost end of the whole granular coal pressurized conveying device 10, the lower end of the coal bunker 11 is sequentially connected with a gate valve 12 and an upper lock hopper valve 13 (comprising two bidirectional hard seal ball valves 20 connected in series), and a coal lock hopper 14 is connected below the upper lock hopper valve 13; the upper end of the coal lock hopper 14 body is respectively connected with a pressure valve 16, a pressure release valve 17 and an emptying valve 18; the lower end of the coal lock hopper 14 is connected with a lower lock hopper valve 15 (comprising two bidirectional hard seal ball valves 20 connected in series).
(1) When no lump granular coal exists in the coal lock hopper, the emptying valve 18 is opened, so that the coal lock hopper 14 is kept in a normal pressure state in the charging process; closing a lower lock hopper valve 15, a pressurizing valve 16 and a pressure release valve 17, sequentially opening a gate valve 12 and an upper lock hopper valve 13, and allowing lump coal in the storage bin 11 to enter a coal lock hopper 14 by virtue of self gravity; when the coal lock hopper 14 reaches the required material level, the gate valve 12 is closed firstly, mainly to avoid the phenomena of material accumulation and material blocking of the upper lock hopper valve 13, then the upper lock hopper valve 13 is closed, and finally the emptying valve 18 is closed;
(2) opening a pressurizing valve 16, and charging gas into the coal lock hopper 14 until the pressure in the coal lock hopper 14 is increased to the required pressure of 3.5-8.5 MPa;
(3) the lower lock hopper valve 15 is opened, the block granular coal enters a gasification furnace (not coded) from the coal lock hopper 14 by means of self gravity, and the pressure in the coal lock hopper 14 must be kept stable in the discharging process and can be adjusted by the opening of the pressurizing valve 16;
(4) after the discharging of the granular coal in the coal lock hopper 14 is finished, the lower lock hopper valve 15 is closed, then the pressure release valve 17 is opened slowly, the pressure in the coal lock hopper is reduced to be in a normal pressure state, and the circulation of the pressure conveying of the lower wheels is carried out.
The present invention has been disclosed in the foregoing in terms of preferred embodiments, but it will be understood by those skilled in the art that these embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to those of the embodiments are intended to be included within the scope of the claims of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined in the claims.
Claims (10)
1, kind of piece granular coal pressurization conveying equipment, its characterized in that includes by coal bunker, push-pull valve, upper lock hopper valve, coal lock fill and lower lock hopper valve that connect gradually from top to bottom, wherein, the coal lock fill is equipped with forcing valve and relief valve.
2. The apparatus of claim 1, wherein the upper and lower lock hopper valves are two-way hard seal ball valves.
3. The apparatus according to claim 1 or 2, wherein the upper and lower lock hopper valves each comprise two bidirectional hard seal ball valves connected in series.
4. The apparatus according to claim 3, wherein the bi-directional hard-seal ball valve comprises a ball, a valve body, a valve seat; wherein the valve seat comprises a scraper, a graphite ring and a spring from the direction close to the sphere to the outside in sequence.
5. The apparatus of claim 4, wherein the valve seat and ball are surface coated with WC or Ni600 and the valve body is provided with purge holes.
6. The lump and granular coal pressure delivery apparatus of claim 1, wherein the coal lock hopper is provided with a blow valve.
The pressure conveying method of lump and granular coal, which is characterized by using the pressure conveying equipment of of any one of claims 1-6, and comprises the following steps:
(1) closing the lower lock hopper valve and the pressurizing valve, and opening the pressure relief valve to enable the pressure of the coal lock hopper to be normal pressure;
(2) sequentially opening the gate valve and the upper lock hopper valve to enable the lump and granular coal in the coal bunker to enter the coal lock hopper under the action of gravity;
(3) when the material level in the coal lock hopper reaches a threshold value, closing the gate valve, the upper lock hopper valve and the pressure release valve in sequence;
(4) opening the pressurizing valve, and opening the lower lock hopper valve to enable the granular coal to enter the gasification furnace after the pressure in the coal lock hopper reaches a threshold value;
(5) and (3) after discharging is finished, repeating the step (1) and carrying out a lower pressure conveying cycle.
8. The lump and granular coal pressure conveying method according to claim 7, wherein in the step (4), the pressure in the coal lock hopper is 3.5-8.5 MPa.
9. The method for pressure conveying lump and granular coal as claimed in claim 7, wherein the lump and granular coal has a particle size of 5mm to 50 mm.
10. The lump and granular coal pressure conveying method according to claim 7, wherein the coal lock hopper is provided with an air vent valve, and in the step (1), the pressure of the coal lock hopper is made to be normal pressure by opening the air vent valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910867421.7A CN110733896A (en) | 2019-09-12 | 2019-09-12 | lump and granular coal pressurized conveying equipment and method |
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| CN201910867421.7A CN110733896A (en) | 2019-09-12 | 2019-09-12 | lump and granular coal pressurized conveying equipment and method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202349257U (en) * | 2011-12-08 | 2012-07-25 | 上海开维喜阀门集团有限公司 | Lock hopper valve seat |
| CN102676229A (en) * | 2012-06-07 | 2012-09-19 | 北京华福神雾工业炉有限公司 | Combined rotational flow bed gasification furnace |
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2019
- 2019-09-12 CN CN201910867421.7A patent/CN110733896A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202349257U (en) * | 2011-12-08 | 2012-07-25 | 上海开维喜阀门集团有限公司 | Lock hopper valve seat |
| CN102676229A (en) * | 2012-06-07 | 2012-09-19 | 北京华福神雾工业炉有限公司 | Combined rotational flow bed gasification furnace |
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| 侯刘涛等: "浅析盘阀在Shell煤气化工艺中的应用", 《中氮肥》 * |
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Application publication date: 20200131 |