CN209956815U - Pipe chain conveying system for directly blending and burning upgraded lignite in thermal power plant - Google Patents
Pipe chain conveying system for directly blending and burning upgraded lignite in thermal power plant Download PDFInfo
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- CN209956815U CN209956815U CN201920676406.XU CN201920676406U CN209956815U CN 209956815 U CN209956815 U CN 209956815U CN 201920676406 U CN201920676406 U CN 201920676406U CN 209956815 U CN209956815 U CN 209956815U
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Abstract
The utility model discloses a direct pipe chain conveying system who burns matter brown coal of improving of blending of thermal power plant, including first pipe chain machine, second pipe chain machine, third pipe chain machine and fourth pipe chain machine, respectively through blanking pipe intercommunication, be provided with negative pressure dust collector on the first pipe chain machine, coal sampling device and the automatic bagging-off and bagging-off packagine machine of going into of factory are installed to one side of first blanking pipe, the artifical sampling device of coal as fired is installed to the opposite side, be provided with a plurality of discharge tubes on third pipe chain machine and the fourth pipe chain machine separately, all be provided with pneumatic discharge valve on every discharge tube, first pipe chain machine, second pipe chain machine, all be provided with explosion-proof door on the work chain pipe of third pipe chain machine and fourth pipe chain machine, the temperature measurement station, carbon dioxide fire extinguishing pipe and earthing device. The utility model discloses totally closed dustless transport, fire prevention and explosion prevention need not the milling of powder process system, can be with carrying nimble transport to boiler powder storehouse of matter-improving lignite powder, has apparent economic value and social value.
Description
Technical Field
The utility model relates to a thermal power generation technical field, concretely relates to thermal power plant directly mixes pipe chain conveying system who burns matter-improving lignite.
Background
At present, lignite burned by a thermal power plant is not subjected to upgrading treatment, and when the lignite is used, raw lignite is conveyed into a plant, conveyed to a raw coal bin through a coal conveying belt, ground into qualified coal powder with coal powder fineness meeting requirements by a coal feeder and a coal grinding machine, and then conveyed into a boiler through a powder making system for combustion. For the intermediate storage type pulverizing system, the blending combustion mode comprises four types of blending lignite in a part of coal bunker, blending lignite in all the coal bunkers, blending lignite in a part of coal bunker and pure-burning lignite in all the coal bunkers, and because raw lignite has the characteristics of large moisture, high volatile content, low heat value and the like, the blending combustion often has the following problems: firstly, the outlet temperature of the coal mill is low, the drying output of a coal pulverizing system is insufficient, and the coal pulverizing output is reduced; secondly, the heat value after combustion is low, and no load is brought; thirdly, a layer of brown coal powder is adhered to the pipe wall of the exhaust pipe of the powder preparation system, and the air pressure at the outlet of the powder exhauster can suddenly fluctuate greatly; fourthly, under the condition that the lignite is easy to accumulate and accumulate coal naturally, a boiler coal conveying system and a boiler coal pulverizing system have great fire hazard, and the safety and the economy are greatly influenced; fifthly, the condition of dust overflow and dust raising can occur in the process of conveying and pulverizing the lignite, so that the environment of a working site is severe. In addition, the problem of large power consumption of the milling system is also existed. Therefore, it is an objective need to develop a pipe chain conveying system for upgraded lignite for direct blending combustion in a thermal power plant, which can flexibly convey upgraded lignite powder to a boiler powder bin, and is capable of realizing fully-closed dust-free conveying, fire prevention and explosion prevention, and does not need a pulverizing system for grinding.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a totally closed dustless transport, fire prevention and explosion prevention need not the milling of powder process system, can directly mix the burning with the pipe chain conveying system who improves the quality brown coal to the thermal power plant in boiler powder storehouse with improving the quality brown coal with the nimble transport of quality brown coal buggy.
The utility model aims at realizing the same, including first pipe chain machine, second pipe chain machine, third pipe chain machine and fourth pipe chain machine, the head end of first pipe chain machine is provided with the pan feeding mouth, be provided with negative pressure dust collector on the work chain pipe near the pan feeding mouth, the tail end is provided with the discharge gate, through first blanking pipe intercommunication between discharge gate and the second pipe chain machine, coal sampling device and the automatic bagging-off envelope packagine machine of entrepreneurial factory are installed to one side of first blanking pipe, the artifical sampling device of coal as fired is installed to the opposite side, second pipe chain machine passes through second blanking pipe and third pipe chain machine intercommunication, third pipe chain machine passes through third blanking pipe and fourth pipe chain machine intercommunication, be provided with a plurality of discharge pipes on third pipe chain machine and the fourth pipe chain machine respectively, all be provided with pneumatic discharge valve on every discharge pipe, all be provided with explosion-proof door on the work chain pipe of first pipe chain machine, second pipe chain machine, third pipe chain machine and fourth pipe chain machine, Temperature measuring point, carbon dioxide fire extinguishing tube and earthing device.
Further, the number of the feeding ports is 4.
Furthermore, the number of the explosion vents arranged on the working chain pipes of the first pipe chain machine and the second pipe chain machine is 1, and the number of the explosion vents arranged on the working chain pipes of the third pipe chain machine and the fourth pipe chain machine is 3, and the explosion vents are arranged on the working chain pipes at intervals.
Furthermore, the number of the temperature measuring points arranged on the working chain pipes of the first pipe chain machine and the second pipe chain machine is 1, and the number of the temperature measuring points arranged on the working chain pipes of the third pipe chain machine and the fourth pipe chain machine is 2, and the temperature measuring points are arranged on the working chain pipes at intervals.
Furthermore, the number of the carbon dioxide fire extinguishing pipes arranged on the working chain pipes of the first pipe chain machine and the second pipe chain machine is 1, and the number of the carbon dioxide fire extinguishing pipes arranged on the working chain pipes of the third pipe chain machine and the fourth pipe chain machine is 2, and the carbon dioxide fire extinguishing pipes are arranged on the working chain pipes at intervals.
Further, negative pressure dust collector includes that 1 eradicates the female pipe of dirt and 2 eradicates the dirt branch pipe, and the one end of the female pipe of dust removal and the working chain pipe intercommunication of first pipe chain machine, the other end pass through three way connection and eradicate dirt branch pipe intercommunication with 2 respectively, all is provided with the stop valve on every female pipe and the branch pipe.
Furthermore, a waste recovery device is arranged on the working chain pipe of the second pipe chain machine.
The utility model adopts the four-section pipe chain machine to convey the upgraded lignite powder to the boiler powder bin in a relay way in a totally-enclosed manner, solves the problem of dust raising, has more accurate conveying capacity, ensures that the pulverized coal is directly mixed and burned without grinding by a powder making system, and has the corresponding coal mill stopped for standby use, the coal feeding time of the whole coal conveying system is shortened, the power consumption of the coal conveying system and the powder making system is effectively reduced, and the power saving effect is obvious; in addition, an explosion door, a temperature measuring point, a carbon dioxide fire extinguishing pipe and a grounding device are arranged in the system, the explosion door and the carbon dioxide fire extinguishing pipe play roles in explosion prevention and fire prevention, the temperature of the coal powder in the pipe can be monitored in real time through the temperature measuring point, the spontaneous combustion condition of the accumulated powder can be found as soon as possible, and the grounding device can timely eliminate static electricity in the system. The utility model discloses totally closed dustless transport, fire prevention and explosion prevention need not the milling of powder process system, can be with carrying nimble transport to boiler powder storehouse of matter-improving lignite powder, has apparent economic value and social value.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
in the figure: 1-a first pipe chain machine, 2-a second pipe chain machine, 3-a third pipe chain machine, 4-a fourth pipe chain machine, 5-a feeding port, 6-a discharging port, 7-a first blanking pipe, 8-a factory coal sampling device, 9-an automatic bagging and bag sealing packaging machine, 10-a furnace coal manual sampling device, 11-a second blanking pipe, 12-a third blanking pipe, 13-a discharging pipe, 14-a pneumatic discharging valve, 15-an explosion door, 16-a temperature measuring point, 17-a carbon dioxide extinguishing pipe, 18-a grounding device, 19-a dust removal main pipe, 20-a dust removal branch pipe, 21-a stop valve and 22-a waste recovery device.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited in any way, and any changes or improvements based on the present invention are all within the protection scope of the present invention.
As shown in fig. 1, the utility model comprises a first pipe chain machine 1, a second pipe chain machine 2, a third pipe chain machine 3 and a fourth pipe chain machine 4, wherein the first pipe chain machine 1, the second pipe chain machine 2, the third pipe chain machine 3 and the fourth pipe chain machine 4 are all the existing pipe chain machines, and can be purchased and used in the market, the head end of the first pipe chain machine 1 is provided with a feeding port 5, a negative pressure dust removing device is arranged on a working chain pipe near the feeding port 5, the negative pressure dust removing device is used for pumping air in the chain pipe of the first pipe chain machine 1, so that the chain pipe is in a micro negative pressure state, the first pipe chain machine 1 is ensured not to fly outwards in the receiving process of upgrading lignite, the tail end is provided with a discharging port 6, the discharging port is communicated with the second pipe chain machine 2 through a first discharging pipe 7, one side of the first discharging pipe 7 is provided with a factory coal sampling device 8 and an automatic bagging and bag sealing packaging machine 9, the other side is provided with a coal as fired manual sampling device 10, the second pipe chain machine 2 is communicated with a third pipe chain machine 3 through a second blanking pipe 11, the third pipe chain machine 3 is communicated with a fourth pipe chain machine 4 through a third blanking pipe 12, a plurality of discharge pipes 13 are respectively arranged on the third pipe chain machine 3 and the fourth pipe chain machine 4, each discharge pipe 13 is provided with a pneumatic discharge valve 14, upgraded lignite in the chain pipe is connected and discharged to a boiler dust bin through the discharge pipe 13, the working chain pipes of the first pipe chain machine 1, the second pipe chain machine 2, the third pipe chain machine 3 and the fourth pipe chain machine 4 are respectively provided with an explosion door 15, a temperature measuring point 16, a carbon dioxide fire extinguishing pipe 17 and a grounding device 18, the explosion door 15 is also used as an access hole, the size of the explosion door 15 on the first pipe chain machine 1 and the second pipe chain machine 2 can be phi 300mm, and the size of the explosion door 15 on the third pipe chain machine 3 and the fourth pipe chain machine 4 can be phi 273mm, the carbon dioxide fire extinguishing pipe 17 can be selected from a pipe with the pipe diameter being DN20, each carbon dioxide fire extinguishing pipe 17 can be controlled through a manual ball valve, in actual operation, the first pipe chain machine 1 can independently use a carbon dioxide fire extinguishing system and a gas cylinder station, the second pipe chain machine 2, the third pipe chain machine 3 and the fourth pipe chain machine 4 can share a carbon dioxide fire extinguishing system and a gas cylinder station, and the principle of nearby arrangement is adopted, so that the operation and the gas cylinder replacement are convenient.
The utility model discloses a coal conveying process does: the coal transporting tank truck connects and unloads upgraded lignite from a feed inlet 5 into a first pipe chain machine 1, then the upgraded lignite powder is sequentially conveyed into a second pipe chain machine 2, a third pipe chain machine 3 and a fourth pipe chain machine 4, and finally conveyed into each boiler powder bin from discharge pipes 13 arranged on the third pipe chain machine 3 and the fourth pipe chain machine 4, in order to ensure conveying output and reliability, the first pipe chain machine 1 and the second pipe chain machine 2 can adopt pipelines with the pipe diameter of DN300mm, and the output is 60m3H, the third pipe chain machine 3 and the fourth pipe chain machine 4 can adopt a pipeline with the pipe diameter of DN250mm and output of 48m3H is used as the reference value. The utility model adopts the four-section pipe chain machine to convey the upgraded lignite powder to each boiler powder bin in a relay way in a totally-enclosed manner, solves the problem of dust raising, has more accurate conveying capacity, ensures that the pulverized coal is directly mixed and burned without being ground by a pulverizer, stops the corresponding coal mill for standby use, shortens the coal feeding time of the whole coal conveying system, effectively reduces the power consumption of the coal conveying system and the powder preparation system, and has obvious power saving effect; secondly, a factory coal sampling device 8 and a fired coal manual sampling device 10 are added in the system, so that automatic sampling and automatic packaging and bag sealing of quality-improved lignite entering a factory are realized, the coal burning management requirements are met, and the fired coal is chargedThe manual sampling device 10 is used for manually sampling the constitutional lignite so as to analyze, test and master the coal quality condition of the fed lignite, in addition, an explosion door 15, a temperature measuring point 16, a carbon dioxide fire extinguishing pipe 17 and a grounding device 18 are arranged in the system, the explosion door 15 and the carbon dioxide fire extinguishing pipe 17 play roles in explosion prevention and fire prevention, the temperature of the pulverized coal in the pipe can be monitored in real time through the temperature measuring point 16, the spontaneous combustion condition of the accumulated powder can be found as soon as possible, the grounding device 18 can timely eliminate static electricity in the system, and the system is safer and more environment-friendly in the use process, and the occupational health risk can be controlled.
The quantity of pan feeding mouth 5 is 4, and 5 departments of every pan feeding mouth keep apart through the hand door, when in actual use, can set up 4 pan feeding mouths 5 into two kinds of specifications, satisfies the fortune coal tank car of two kinds of models and unloads toward the chain pipe in.
For explosion prevention, the number of explosion vents 15 arranged on the working chain pipes of the first pipe chain machine 1 and the second pipe chain machine 2 is 1, the number of explosion vents 15 arranged on the working chain pipes of the third pipe chain machine 3 and the fourth pipe chain machine 4 is 3, and the explosion vents are arranged on the working chain pipes at intervals, when the explosion-proof device is used, one explosion vent can be arranged at intervals of 20 meters, and the explosion vents can also be arranged according to actual needs, when pulverized coal in the chain pipes is spontaneously combusted and exploded, the explosion vents are broken and decompressed, and the rest parts of the device are protected from being damaged.
In order to reduce the temperature and prevent fire, the number of the carbon dioxide fire extinguishing pipes 17 arranged on the working chain pipes of the first pipe chain machine 1 and the second pipe chain machine 2 is 1, the number of the carbon dioxide fire extinguishing pipes 17 arranged on the working chain pipes of the third pipe chain machine 3 and the fourth pipe chain machine 4 is 2, the carbon dioxide fire extinguishing pipes are arranged on the working chain pipes at intervals, and when the temperature of coal powder in the chain pipes is too high, namely higher than 80 ℃, or the accumulated powder is spontaneously combusted, the carbon dioxide fire extinguishing pipes 17 can be filled with carbon dioxide to reduce the temperature or extinguish fire.
In order to monitor the temperature of the upgraded lignite powder in real time and discover the spontaneous combustion condition of the accumulated powder as soon as possible, the number of the temperature measuring points 16 arranged on the working chain pipes of the first pipe chain machine 1 and the second pipe chain machine 2 is 1, the number of the temperature measuring points 16 arranged on the working chain pipes of the third pipe chain machine 3 and the fourth pipe chain machine 4 is 2, the temperature measuring points 16 are arranged on the working chain pipes at intervals, and the temperature measuring points 16 are used for monitoring the pipe wall temperature of the pipe chains.
In order to control the raised dust possibly generated during the unloading of the automobile, the negative pressure dust removal device comprises a 1 dust removal main pipe 19 and a 2 dust removal branch pipe 20, one end of the dust removal main pipe 19 is communicated with a working chain pipe of the first pipe chain machine 1, the other end of the dust removal main pipe is respectively communicated with the 2 dust removal branch pipes 20 through a three-way joint, each dust removal main pipe 19 and each dust removal branch pipe 20 are respectively provided with a stop valve 21, the stop valves 21 can be manual ball valves and can be used when the system is isolated, the dust removal main pipe 19 can be a galvanized pipe with the pipe diameter of DN50, and the air outlet of the 2 dust removal branch pipes 20 can be respectively communicated with the existing powder exhauster of a power plant, so that the inside of a chain pipe of the.
The waste recovery device 22 is arranged on the working chain pipe at the tail end of the second pipe chain machine 2, so that the abandoned upgraded lignite coal powder sample is recovered nearby, and the manpower for cleaning and carrying the coal powder sample is reduced.
The utility model discloses in, first pipe chain machine 1, second pipe chain machine 2, third pipe chain machine 3 and fourth pipe chain machine 4 all adopt frequency conversion control, frequency conversion control system and DCS control system can realize that the long-range of pipe chain conveying system is kept watch on, the adjustment, open and stop operation and chain protection, and use video monitoring system, to the vehicle process of unloading, go into factory's coal sampling packing, pipe chain system has the powder of leaking or not and long-pending powder spontaneous combustion condition to keep watch on, degree of automation is higher, use safe and reliable.
Claims (7)
1. A heat-engine plant is directly mixed and is burnt pipe chain conveying system of upgrading brown coal, its characterized in that: the device comprises a first pipe chain machine (1), a second pipe chain machine (2), a third pipe chain machine (3) and a fourth pipe chain machine (4), wherein a feed inlet (5) is formed in the head end of the first pipe chain machine (1), a negative pressure dust removal device is arranged on a working chain pipe near the feed inlet (5), a discharge outlet (6) is formed in the tail end of the first pipe chain machine, the discharge outlet is communicated with the second pipe chain machine (2) through a first blanking pipe (7), a factory coal sampling device (8) and an automatic bagging and sealing packaging machine (9) are installed on one side of the first blanking pipe (7), a boiler coal manual sampling device (10) is installed on the other side of the first pipe chain machine, the second pipe chain machine (2) is communicated with the third pipe chain machine (3) through a second blanking pipe (11), the third pipe chain machine (3) is communicated with the fourth pipe chain machine (4) through a third blanking pipe (12), and a plurality of discharge pipes (13) are respectively arranged on the third pipe chain machine (3) and the fourth pipe chain machine (4), each discharging pipe (13) is provided with a pneumatic discharging valve (14), and the working chain pipes of the first pipe chain machine (1), the second pipe chain machine (2), the third pipe chain machine (3) and the fourth pipe chain machine (4) are provided with an explosion-proof door (15), a temperature measuring point (16), a carbon dioxide fire extinguishing pipe (17) and a grounding device (18).
2. The pipe chain conveying system for the direct blending combustion upgraded lignite of the thermal power plant as claimed in claim 1, wherein the number of the feeding ports (5) is 4.
3. The pipe chain conveying system for the direct blending combustion upgraded lignite of the thermal power plant as claimed in claim 1, wherein the number of the explosion-proof doors (15) arranged on the working chain pipes of the first pipe chain machine (1) and the second pipe chain machine (2) is 1, and the number of the explosion-proof doors (15) arranged on the working chain pipes of the third pipe chain machine (3) and the fourth pipe chain machine (4) is 3, and the explosion-proof doors are arranged on the working chain pipes at intervals.
4. The pipe chain conveying system for the direct blended combustion upgraded lignite of the thermal power plant as claimed in claim 1, wherein the number of the temperature measuring points (16) arranged on the working chain pipes of the first pipe chain machine (1) and the second pipe chain machine (2) is 1, and the number of the temperature measuring points (16) arranged on the working chain pipes of the third pipe chain machine (3) and the fourth pipe chain machine (4) is 2, and the temperature measuring points are arranged on the working chain pipes at intervals.
5. The pipe chain conveying system for the direct blending combustion upgraded lignite of the thermal power plant as claimed in claim 1, wherein the number of the carbon dioxide fire extinguishing pipes (17) arranged on the working chain pipes of the first pipe chain machine (1) and the second pipe chain machine (2) is 1, and the number of the carbon dioxide fire extinguishing pipes (17) arranged on the working chain pipes of the third pipe chain machine (3) and the fourth pipe chain machine (4) is 2, and the carbon dioxide fire extinguishing pipes are arranged on the working chain pipes at intervals.
6. The pipe chain conveying system for the direct blending combustion upgraded lignite of the thermal power plant as claimed in claim 1, wherein the negative pressure dust removal device comprises a 1 dust removal main pipe (19) and 2 dust removal branch pipes (20), one end of the dust removal main pipe (19) is communicated with a working chain pipe of the first pipe chain machine (1), the other end of the dust removal main pipe is respectively communicated with the 2 dust removal branch pipes (20) through a three-way joint, and each dust removal main pipe (19) and each dust removal branch pipe (20) are provided with a stop valve (21).
7. The pipe chain conveying system for the direct blending combustion upgraded lignite of the thermal power plant as claimed in claim 1, wherein a waste recovery device (22) is arranged on a working chain pipe at the tail end of the second pipe chain machine (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920676406.XU CN209956815U (en) | 2019-05-13 | 2019-05-13 | Pipe chain conveying system for directly blending and burning upgraded lignite in thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920676406.XU CN209956815U (en) | 2019-05-13 | 2019-05-13 | Pipe chain conveying system for directly blending and burning upgraded lignite in thermal power plant |
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| CN209956815U true CN209956815U (en) | 2020-01-17 |
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| CN201920676406.XU Active CN209956815U (en) | 2019-05-13 | 2019-05-13 | Pipe chain conveying system for directly blending and burning upgraded lignite in thermal power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113493088A (en) * | 2021-04-29 | 2021-10-12 | 宁夏大洋饲料科技有限公司 | Ultrahigh-distance negative-pressure efficient material conveying system |
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2019
- 2019-05-13 CN CN201920676406.XU patent/CN209956815U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113493088A (en) * | 2021-04-29 | 2021-10-12 | 宁夏大洋饲料科技有限公司 | Ultrahigh-distance negative-pressure efficient material conveying system |
| CN113493088B (en) * | 2021-04-29 | 2022-09-20 | 宁夏大洋饲料科技有限公司 | Ultrahigh-distance negative-pressure efficient material conveying system |
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