Coal feeding system suitable for sequential interlocking control of lump coal
The coal feeding system with sequential interlocking control addresses the challenges of valve wear and leakage in lump coal feeding by using synchronized spherical valve groups and alternating coal lock hoppers, ensuring stable and efficient coal transfer to the gasifier.
Patent Information
- Application Number
- CN202421096628.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-20
AI Technical Summary
Existing coal feeding systems for lump coal in pressurized gasifiers face issues with long operation times, poor continuity and stability due to frequent valve switching, valve wear, and leakage, which affect the gasifier's load and normal operation.
A coal feeding system with sequential interlocking control, featuring a raw coal bunker, coal lock hopper, upper and lower spherical valve groups with scrapers and purge devices, and a control system using position feedback sensors to ensure synchronized and sealed coal transfer, utilizing high-pressure nitrogen purging and alternating coal lock hoppers for stable operation.
The system enhances the continuity and stability of coal feeding, reduces valve wear, and improves the gasifier's load capacity by ensuring synchronized and sealed coal transfer, thereby maintaining consistent operation and reducing maintenance needs.
Smart Images
Figure CN222250613U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of modern coal chemical industry, in particular to a coal feeding system suitable for sequential interlocking control of lump coal. Background Art
[0002] In the technology of existing coal gasification equipment, the coal feeding system of the pressurized gasifier of various raw materials, lump coal (crushed coal), generally uses an intermittently operated coal lock bucket to feed coal into the gasifier through upper and lower valves. The coal lock needs to be frequently switched between normal pressure and high pressure. The upper and lower valves of the coal lock are opened frequently, and the pressure reduction and pressurization time is long, which causes the coal feeding system to consume a long time, is not conducive to the increase of the gasifier load, and is not conducive to the continuity and stability of the feed.
[0003] In addition, the frequent opening of the coal lock places high demands on the sealing and durability of the coal lock valve system. Since the lump coal (crushed coal) is hard and irregular in shape, it is easy to cause surface physical damage to the valve core of the upper and lower valves of the coal lock bucket during the falling process, and the valve is prone to leakage, which can easily cause the coal lock bucket to fail the airtightness inspection during the pressurization and depressurization of the coal lock bucket, resulting in interruption of normal operation. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the defects in the prior art and provide a coal feeding system suitable for sequential interlocking control of lump coal.
[0005] The utility model solves the above technical problems through the following technical solutions:
[0006] A coal feeding system suitable for sequential interlocking control of lump coal, comprising:
[0007] Raw coal bunker, used to store raw lump coal;
[0008] A coal lock hopper is provided downstream of the raw coal bunker and is used to seal and pressurize the raw lump coal;
[0009] An upper pipeline connecting the raw coal bunker and the coal lock hopper;
[0010] A gasifier; arranged downstream of the coal lock hopper;
[0011] A lower pipeline connecting the coal lock hopper and the gasifier;
[0012] An upper spherical valve group is installed on the upper pipeline at a position close to the raw coal bunker;
[0013] A lower spherical valve group is installed on the lower pipeline near the coal lock bucket;
[0014] The upper spherical valve group and the lower spherical valve group each include a valve body, a valve core, a slag coal scraper, a purge device, a position feedback sensor and a control system;
[0015] The slag coal scraper scrapes off the slag coal on the valve core when the valve core moves;
[0016] When the valve core is in motion, the purge device sprays high-pressure gas to blow away the slag and coal on the valve core;
[0017] The position feedback sensor is electrically connected to the control system, and the position feedback sensor and the control system are configured as follows: when the position feedback sensor detects that the lower spherical valve group is closed, it sends a signal to the control system, and the control system can open the upper spherical valve group; when the position feedback sensor detects that the upper spherical valve group is closed, it sends a signal to the control system, and the control system can open the lower spherical valve group.
[0018] Preferably, the coal lock hopper comprises: a first coal lock hopper, a second coal lock hopper and a third coal lock hopper arranged downstream of the raw coal bunker;
[0019] The upper pipeline includes: a first upper pipeline connecting the raw coal bunker and the first coal lock hopper, a second upper pipeline connecting the raw coal bunker and the second coal lock hopper, and a third upper pipeline connecting the raw coal bunker and the third coal lock hopper;
[0020] The lower pipeline includes: a first lower pipeline connecting the second coal lock hopper and the gasifier, a second lower pipeline connecting the second coal lock hopper and the gasifier, and a third lower pipeline connecting the third coal lock hopper and the gasifier;
[0021] The upper ball valve group includes: a first ball valve group installed on the first upper pipeline near the raw coal bunker, a second ball valve group installed on the second upper pipeline near the raw coal bunker, and a third ball valve group installed on the second upper pipeline near the raw coal bunker;
[0022] The lower spherical valve group includes: a fourth spherical valve group installed on the first lower pipeline near the first coal lock bucket, a fifth spherical valve group installed on the second lower pipeline near the second coal lock bucket, and a sixth spherical valve group installed on the third lower pipeline near the third coal lock bucket.
[0023] Preferably, the coal lock hopper and the lower ball valve group are configured such that the raw material lump coal is alternately fed to the gasifier from the three coal lock hoppers through the lower pipeline and the lower ball valve group in sequence.
[0024] Preferably, the purging device is a high-pressure nitrogen purging device.
[0025] On the basis of conforming to the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.
[0026] The positive progress effect of the utility model is that the coal feeding system of the utility model with sequential interlocking control of lump coal includes a raw coal bunker, a coal lock bucket, an upper pipeline, a gasifier, a lower pipeline, an upper spherical valve group and a lower spherical valve group. The upper spherical valve group and the lower spherical valve group of the utility model are both provided with a slag coal scraper, a purge device, a position feedback sensor and a control system. The utility model overcomes the disadvantages of the common spherical valve group that when the lump coal and the valve core of the spherical valve group are in action, the valve core of the spherical valve group is easily worn, and the operation cycle is short. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of a coal feeding system with sequential interlocking control applicable to lump coal according to a preferred embodiment of the utility model.
[0028] Description of reference numerals:
[0029] Raw coal bunker 1
[0030] Coal lock bucket 2
[0031] First coal lock hopper 2a
[0032] Second coal lock hopper 2b
[0033] The third coal lock bucket 2c
[0034] Upper ball valve group 100
[0035] The first spherical valve group 11
[0036] The second spherical valve group 12
[0037] The third ball valve group 13
[0038] Lower ball valve group 200
[0039] Fourth spherical valve group 21
[0040] Fifth spherical valve group 22
[0041] The sixth spherical valve group 23
[0042] Upper pipeline 300
[0043] First upper pipeline 14
[0044] Second upper pipeline 15
[0045] The third upper pipeline 16
[0046] Lower pipe 400
[0047] First lower pipeline 24
[0048] Second lower pipeline 25
[0049] The third lower pipeline 26
[0050] Gasifier 3
[0051] Purge device 4 DETAILED DESCRIPTION
[0052] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0053] It should be noted that in the claims and description of this patent, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0054] like Figure 1 As shown, this embodiment discloses a coal feeding system with sequential interlocking control suitable for lump coal, which includes a raw coal bin 1, a coal lock bucket 2, an upper pipeline 300, a gasifier 3, an upper pipeline 400, an upper spherical valve group 100 and a lower spherical valve group 200.
[0055] The raw coal bunker 1 is used to store raw material lump coal (crushed coal).
[0056] The coal lock hopper 2 is arranged downstream of the raw coal bunker 1 . The raw coal bunker 1 and the coal lock hopper 2 are connected through an upper pipeline 300 . The coal lock hopper 2 is used to transport the raw coal blocks into the gasifier 3 through sealing and pressurizing.
[0057] The gasifier 3 is disposed downstream of the coal lock hopper 2 , and the coal lock hopper 2 and the gasifier 3 are connected via an upper pipeline 400 .
[0058] The upper spherical valve group 100 is installed on the upper pipeline 300 near the raw coal bunker 1 to control the raw coal block (crushed coal) to fall from the raw coal bunker 1 to the coal lock hopper 2 to maintain good sealing performance of the coal lock hopper 2 under high pressure.
[0059] The lower spherical valve assembly 200 is installed on the upper pipeline 400 near the coal lock hopper 2 to control the raw material lump coal (crushed coal) to fall from the coal lock hopper 2 into the gasifier 3 and maintain good sealing performance of the coal lock hopper 2 under high pressure.
[0060] The upper spherical valve group 100 and the lower spherical valve group 200 both include a valve body, a valve core, a slag coal scraper, a purge device 4, a position feedback sensor and a control system.
[0061] When the valve core moves, the slag coal scraper scrapes off the slag coal on the valve core. When the valve core moves, the purge device 4 sprays high-pressure gas to blow off the slag coal on the valve core, thereby ensuring smooth coal discharge and pressure sealing of the raw coal bunker 1 and the coal lock hopper 2. In this embodiment, the purge device 4 is a high-pressure nitrogen purge device 4, but is not limited thereto.
[0062] The position feedback sensor is electrically connected to the control system, and the position feedback sensor and the control system are configured as follows: when the position feedback sensor detects that the lower spherical valve group 200 is closed, it sends a signal to the control system, and the control system can open the upper spherical valve group 100; when the position feedback sensor detects that the upper spherical valve group 100 is closed, it sends a signal to the control system, and the control system can open the lower spherical valve group 200.
[0063] That is, every time the coal lock hopper 2 needs to open the upper ball valve group 100 to feed coal, first check whether the lower ball valve group 200 of the upper pipeline 400 of the corresponding coal lock hopper 2 is closed. Only after the position feedback sensor detects the corresponding closing signal can the control system open the upper ball valve group 100 of the upper pipeline 300.
[0064] Every time the coal lock hopper 2 needs to feed coal into the gasifier 3, the lower spherical valve group 200 of the upper pipeline 400 needs to be opened. First, check whether the upper spherical valve group 100 of the corresponding upper pipeline 300 of the coal lock hopper 2 is closed. After the position feedback sensor detects the corresponding closing signal, the control system can open the lower spherical valve group 200 of the upper pipeline 400.
[0065] Moreover, each time the upper spherical valve group 100 or the lower spherical valve group 200 needs to be actuated, the corresponding high-pressure nitrogen purge device 4 must be opened to purge the valve core with high-pressure nitrogen. When the valve action is completed, the high-pressure nitrogen is closed after a delay of 5 seconds.
[0066] When the coal lock hopper 2 is adding coal, it is first detected whether the feedback signal of the upper spherical valve group 100 closing is received. After confirmation, the coal lock hopper 2 performs the pressurization operation again. After pressurizing to the pressure of the gasifier 3, the lower spherical valve group 200 is opened, and the raw material lump coal (crushed coal) enters the gasifier 3 through the upper pipeline 400. All the lump coal in the coal lock hopper 2 enters the gasifier 3. After the coal adding is completed, the lower spherical valve group 200 is closed. After receiving the feedback signal of the spherical valve group closing, the coal lock hopper 2 performs the pressure relief operation again. After the coal lock hopper 2 is depressurized to normal pressure, the coal lock hopper 2 can be added with coal again, and a new cycle begins.
[0067] Furthermore, in the present embodiment, the coal lock hopper 2 comprises: a first coal lock hopper 2a, a second coal lock hopper 2b and a third coal lock hopper 2c which are arranged downstream of the raw coal bin 1.
[0068] Correspondingly, the upper pipeline 300 includes: a first upper pipeline 14 connecting the raw coal bin 1 and the first coal lock hopper 2a, a second upper pipeline 15 connecting the raw coal bin 1 and the second coal lock hopper 2b, and a third upper pipeline 16 connecting the raw coal bin 1 and the third coal lock hopper 2c.
[0069] The upper pipeline 400 includes: a first lower pipeline 24 connecting the second coal lock hopper 2 b and the gasifier 3 , a second lower pipeline 25 connecting the second coal lock hopper 2 b and the gasifier 3 , and a third lower pipeline 26 connecting the third coal lock hopper 2 c and the gasifier 3 .
[0070] The upper spherical valve group 100 includes: a first spherical valve group 11 installed on the first upper pipeline 14 near the raw coal bin 1, a second spherical valve group 12 installed on the second upper pipeline 15 near the raw coal bin 1, and a third spherical valve group 13 installed on the second upper pipeline 15 near the raw coal bin 1.
[0071] The lower spherical valve group 200 includes: a fourth spherical valve group 21 installed in the first lower pipeline 24 near the first coal lock bucket 2a, a fifth spherical valve group 22 installed in the second lower pipeline 25 near the second coal lock bucket 2b, and a sixth spherical valve group 23 installed in the third lower pipeline 26 near the third coal lock bucket 2c.
[0072] That is, the coal feeding system of the present embodiment with sequential interlocking control for lump coal has a raw coal bunker 1, three coal lock buckets, an upper spherical valve group 100 is installed on the upper pipeline of each coal lock bucket 2, and a lower spherical valve group 200 is installed on the lower pipeline of each coal lock bucket 2. Each upper spherical valve group 100 and lower spherical valve group 200 are equipped with a slag coal scraper, a high-pressure nitrogen purge pipe, a position feedback sensor and a control system. The opening and closing of the upper spherical valve group 100 and the lower spherical valve group 200 corresponding to each coal lock bucket 2 are sequentially operated, and interlocking control is realized through the position feedback sensor and the control system. The upper spherical valve group 100 and the lower spherical valve group 200 cannot be opened at the same time. Every time one of them needs to be opened, the other spherical valve group is guaranteed to be in a closed state.
[0073] The raw material lump coal (crushed coal) is alternately fed to the gasifier 3 by three coal lock hoppers through the corresponding upper pipeline 400 and the lower ball valve group 200. When any one coal lock hopper feeds coal to the gasifier 3 through the feeding pipeline, the other two coal lock hoppers feed from the raw coal bin 1 or the coal lock hopper valves are all locked. At any time, only one coal lock hopper feeds coal to the gasifier 3 through the feeding pipeline, which ensures the stability of the operation in the gasifier 3.
[0074] In this embodiment, the coal lock hopper 2 is periodically pressurized and depressurized. The upper spherical valve group 10020 minutes of each coal lock hopper 2 is opened once to deliver the normal pressure lump coal (crushed coal) into the coal lock hopper 2; the lower spherical valve group 20020 minutes of each coal lock hopper 2 is opened once to deliver the pressurized lump coal (crushed coal) into the gasifier 3.
[0075] The upper ball valve group 100 and the lower ball valve group 200 of this embodiment are both provided with a slag coal scraper and a high-pressure nitrogen purge device 4, a position feedback sensor and a control system. The utility model overcomes the shortcomings of the common ball valve group when the lump coal (broken coal) contacts the ball valve core, the ball valve core is easily worn, and the operation cycle is short. In addition, this embodiment adopts three coal lock buckets 2 to alternately feed coal to the gasifier 3, thereby overcoming the defects of discontinuous and unstable coal feeding and frequent equipment maintenance when the number of coal lock buckets 2 is small. The coal feeding system of this embodiment can stagger the coal feeding into the gasifier 3 at intervals. Each coal lock bucket is opened twice in 21 hours, and coal is fed into the gasifier 3 four times. The three upper pipelines 400 are evenly arranged with six unloading points, so that the coal feeding time is short and the coal seam is relatively flat, which effectively improves the coal feeding load of the gasifier 3, the continuity of the feeding process and the stability of the operation of the gasifier 3.
Claims
1. A coal feeding system suitable for sequential interlocking control of lump coal, characterized in that: include: Raw coal bunker, used to store raw lump coal; A coal lock hopper is provided downstream of the raw coal bunker and is used to seal and pressurize the raw lump coal; An upper pipeline connecting the raw coal bunker and the coal lock hopper; Gasifier; Located downstream of the coal lock hopper; A lower pipeline connecting the coal lock hopper and the gasifier; An upper spherical valve group is installed on the upper pipeline at a position close to the raw coal bunker; A lower spherical valve group is installed on the lower pipeline near the coal lock bucket; The upper spherical valve group and the lower spherical valve group each include a valve body, a valve core, a slag coal scraper, a purge device, a position feedback sensor and a control system; The slag coal scraper scrapes off the slag coal on the valve core when the valve core moves; When the valve core is in motion, the purge device sprays high-pressure gas to blow away the slag and coal on the valve core; The position feedback sensor is electrically connected to the control system, and the position feedback sensor and the control system are configured as follows: when the position feedback sensor detects that the lower spherical valve group is closed, it sends a signal to the control system, and the control system can open the upper spherical valve group; when the position feedback sensor detects that the upper spherical valve group is closed, it sends a signal to the control system, and the control system can open the lower spherical valve group.
2. The coal feeding system applicable to sequential interlocking control of lump coal according to claim 1, characterized in that: The coal lock hopper comprises: a first coal lock hopper, a second coal lock hopper and a third coal lock hopper arranged downstream of the raw coal bunker; The upper pipeline includes: a first upper pipeline connecting the raw coal bunker and the first coal lock hopper, a second upper pipeline connecting the raw coal bunker and the second coal lock hopper, and a third upper pipeline connecting the raw coal bunker and the third coal lock hopper; The lower pipeline includes: a first lower pipeline connecting the second coal lock hopper and the gasifier, a second lower pipeline connecting the second coal lock hopper and the gasifier, and a third lower pipeline connecting the third coal lock hopper and the gasifier; The upper ball valve group includes: a first ball valve group installed on the first upper pipeline near the raw coal bunker, a second ball valve group installed on the second upper pipeline near the raw coal bunker, and a third ball valve group installed on the second upper pipeline near the raw coal bunker; The lower spherical valve group includes: a fourth spherical valve group installed on the first lower pipeline near the first coal lock bucket, a fifth spherical valve group installed on the second lower pipeline near the second coal lock bucket, and a sixth spherical valve group installed on the third lower pipeline near the third coal lock bucket.
3. The coal feeding system applicable to sequential interlocking control of lump coal as claimed in claim 2, characterized in that: The coal lock hopper and the lower ball valve group are configured such that the raw material lump coal is alternately fed to the gasifier from the three coal lock hoppers through the lower pipeline and the lower ball valve group in sequence.
4. The coal feeding system applicable to sequential interlocking control of lump coal according to claim 1, characterized in that: The purging device is a high-pressure nitrogen purging device.