CN108048137B - Pulverized coal steady-flow conveying device and conveying method - Google Patents
Pulverized coal steady-flow conveying device and conveying method Download PDFInfo
- Publication number
- CN108048137B CN108048137B CN201711322543.5A CN201711322543A CN108048137B CN 108048137 B CN108048137 B CN 108048137B CN 201711322543 A CN201711322543 A CN 201711322543A CN 108048137 B CN108048137 B CN 108048137B
- Authority
- CN
- China
- Prior art keywords
- cone
- conveying
- pulverized coal
- coal
- feed tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/48—Apparatus; Plants
- C10J3/50—Fuel charging devices
- C10J3/506—Fuel charging devices for entrained flow gasifiers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The invention discloses a pulverized coal steady-flow conveying device and a conveying method, which utilize inert gases including nitrogen and carbon dioxide to carry dry pulverized coal to a pressurized gasifier in a dense-phase pneumatic manner so as to obtain dense-phase pressurized pulverized coal steady-flow rate; the device comprises a feed tank, a feed tank cone, a ventilation cone, a partition plate, a clamping block, a conveying pipeline and an air distribution plate; welding clamping blocks at the cone part of the pulverized coal feeding tank, clamping the partition plate, and dividing the inner space of the cone part into a plurality of blanking spaces; the method can stably and respectively convey the pulverized coal to two or even more coal burners, avoid influencing normal gasification operation and equipment damage caused by unstable temperature in the gasification furnace due to fluctuation of the pulverized coal conveying amount, and save investment cost.
Description
Technical Field
The invention belongs to the technical field of pulverized coal conveying, and particularly relates to a pulverized coal steady-flow conveying device and a conveying method.
Background
The natural resources of China are characterized by being rich in coal, lean in oil and less in gas, so that the coal is determined to occupy a large proportion in primary energy consumption. Compared with petroleum and natural gas, the coal reserves in China are relatively larger, china is also the first big country of coal production in the world. The direct utilization of coal is not only low in efficiency, but also causes serious pollution to air, soil and water quality, and research and development of clean coal utilization technology are promoted at home and abroad in order to improve the utilization efficiency of coal and reduce pollution, wherein coal gasification is a core technology of clean utilization of coal and is a tap technology in the fields of IGCC power generation and coal chemical industry. Gasification furnaces are generally classified into three types, i.e., fixed bed, fluidized bed, and entrained flow gasification techniques, depending on the particle size of the coal species required for gasification and the flow state of the particles in the gasification furnace. Entrained-flow gasification technology is divided into dry coal dust and coal water slurry gasification technology according to different forms of feeding, and in the dry coal dust gasification technology, dry coal dust dense phase conveying is one of key technologies of dry coal dust entrained-flow gasification. The steady flow conveying of the pulverized coal is a precondition of stable operation of the dry pulverized coal entrained flow gasification. The two-stage dry coal powder pressurizing and gasifying device with independent intellectual property right in China adopts a dry coal powder dense phase pressure-adding conveying technology, adopts a single-cone multi-branch upper discharge or multi-cone multi-branch lower discharge structure form, and is provided with a fluidization plate vertical to a coal powder pipe orifice at the bottom of a conveying tank, so that coal powder can be conveyed accurately and continuously according to requirements. However, in actual operation, there is a problem that it is difficult for multiple branches to simultaneously adjust the conveying amount at a target value and there is interference in powder conveying.
Disclosure of Invention
Aiming at the fact that the multi-branch coal powder conveying pipeline cannot meet the balance and stability of multi-branch coal line operation in single-cone conveying tank equipment, the running state needs to be more perfect to meet the increasingly-improved requirements of industrial control, and further the coal powder steady-flow conveying device and the coal powder steady-flow conveying method are provided, coal powder can be uniformly and stably supplied to a gasification furnace nozzle, and the method has the effects of economy, high efficiency, safety and simplicity in operation.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the utility model provides a buggy stationary flow conveyor, includes feed tank 1, and feed tank 1 lower part is feed tank cone 2, and feed tank cone 2 bottom intercommunication has ventilation cone 3, is provided with grid plate 7 in the ventilation cone 3, and feed tank cone 2 inner wall symmetry position welding has multiunit clamp splice 5, and each clamp splice 5 presss from both sides a baffle 4, and a plurality of baffles 4 separate feed tank cone 2 inner space into a plurality of unloading spaces; the conveying pipeline 6 is inserted from the upper part of the feeding tank 1 and extends into the cone 2 of the feeding tank, the distance between the pipe orifice of the conveying pipeline 6 and the air distribution plate 7 is kept within the range of 50-300 mm, and an air quantity control valve is arranged on the conveying pipeline 6.
A movable gap is reserved between the clamping block 5 and the partition plate 4, so that relative sliding can be generated.
The distance between the partition plate 4 adjacent to the air distribution plate 7 on the feeding tank cone 2 and the air distribution plate 7 is less than 20mm.
The thickness of the partition board 4 is 10-30mm, and the material is Q345.
According to the conveying method of the pulverized coal steady-flow conveying device, a large amount of pulverized coal is stored in the feed tank 1, under the condition of normal conveying, the required pulverized coal amount is regulated according to the load of the gasifier, inert gas introduced from the outside is started to serve as fluidization air, the fluidization air enters the feed tank cone 2 and the ventilation cone 3 of the feed tank 1 in combination with the air quantity control valve of the conveying pipeline 6, the pulverized coal in the feed tank 1 is fluidized after passing through the air distribution plate 7, and the fluidized pulverized coal is conveyed to a coal burner under the action of high-pressure conveying air.
Compared with the prior art, the invention has the following advantages:
1. the pulverized coal steady flow conveying device can ensure smooth discharging and discharging, and can minimize the mutual influence during the conveying of double-material pipelines.
2. In the pulverized coal conveying process, clamping blocks are welded at the cone parts of the pulverized coal feeding tanks to clamp the partition plates, so that stable running of coal lines is achieved.
Drawings
FIG. 1 is a schematic diagram of a pulverized coal steady flow conveyor of the present invention.
Fig. 2 is a schematic view of a separator arrangement.
Fig. 3 is a schematic view of a bulkhead installation.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
As shown in figure 1, the pulverized coal steady-flow conveying device comprises a feed tank 1, a feed tank cone 2, a ventilation cone 3, a baffle plate 4, a clamping block 5, a conveying pipeline 6 and an air distribution plate 7; the lower part of the feed tank 1 is provided with a feed tank cone 2, the bottom of the feed tank cone 2 is communicated with a ventilation cone 3, an air distribution plate 7 is arranged in the ventilation cone 3, a plurality of groups of clamping blocks 5 are welded at symmetrical positions of the inner wall of the feed tank cone 2, each group of clamping blocks 5 clamps one partition plate 4, and the space in the feed tank cone 2 is divided into a plurality of blanking spaces by the plurality of partition plates 4; the conveying pipeline 6 is inserted from the upper part of the feeding tank 1 and extends into the cone 2 of the feeding tank, the distance between the pipe orifice of the conveying pipeline 6 and the air distribution plate 7 is kept within the range of 50-300 mm, and an air quantity control valve is arranged on the conveying pipeline 6.
Welding clamping blocks at the cone 2 part of the feeding tank, as shown in figure 2; the clamping blocks 5 clamp the partition board 3 as shown in fig. 3; the space of the feed tank cone 2 is divided into a plurality of blanking spaces as shown in figure 2.
As a preferred embodiment of the present invention, a movable gap is left between the clamping block 5 and the partition board 4, so that relative sliding can be generated; the design is adopted mainly to consider the damage of the feed tank 1 caused by uneven equipment expansion and contraction due to gravity or thermal stress, so that the equipment is protected, and the investment cost is saved.
As a preferred embodiment of the invention, the distance between the baffle plate 4 adjacent to the air distribution plate 7 and the air distribution plate 7 on the cone 2 of the feeding tank is less than 20mm; according to the installation distance, the gas-solid ratio of the conveying gas can be optimized to the greatest extent, and the mutual disturbance between the pulverized coal conveying pipelines can be reduced to a certain extent.
In a preferred embodiment of the present invention, the thickness of the separator 4 is 10-30mm, and the material is Q345.
According to the conveying method of the pulverized coal steady-flow conveying device, a large amount of pulverized coal is stored in a feed tank 1, under the normal conveying condition, the required pulverized coal amount is regulated according to the load of a gasification furnace, inert gases (nitrogen and carbon dioxide) introduced from the outside are started to serve as fluidizing air, the fluidizing air enters a feed tank cone 2 and a ventilation cone 3 by combining an air quantity control valve of a conveying pipeline 6 and a corresponding discharge control valve, the pulverized coal in the feed tank 1 is fluidized after passing through an air distribution plate 7, and the fluidized pulverized coal is conveyed to a coal burner under the action of high-pressure conveying air.
Claims (3)
1. The utility model provides a buggy stationary flow conveyor, includes feed tank (1), its characterized in that: the lower part of the feed tank (1) is provided with a feed tank cone (2), the bottom of the feed tank cone (2) is communicated with a ventilation cone (3), air distribution plates (7) are arranged in the ventilation cone (3), a plurality of groups of clamping blocks (5) are welded at symmetrical positions of the inner wall of the feed tank cone (2), each group of clamping blocks (5) clamps one partition plate (4), and the space in the feed tank cone (2) is divided into a plurality of blanking spaces by the plurality of partition plates (4); the conveying pipeline (6) is inserted from the upper part of the feeding tank (1) and extends into the cone (2) of the feeding tank, the distance between the pipe orifice of the conveying pipeline (6) and the air distribution plate (7) is kept within the range of 50-300 mm, and an air quantity control valve is arranged on the conveying pipeline (6);
a movable gap is reserved between the clamping block (5) and the partition plate (4), so that relative sliding can be generated;
the distance between the partition plate (4) adjacent to the air distribution plate (7) on the feeding tank cone (2) and the air distribution plate (7) is smaller than 20mm.
2. The pulverized coal steady flow conveyor according to claim 1, characterized in that: the thickness of the partition board (4) is 10-30mm, and the material is Q345.
3. The method for conveying the pulverized coal steady flow conveying device according to claim 1, which is characterized in that: the feeding tank (1) stores a large amount of coal dust, under the normal conveying condition, the required coal dust amount is regulated according to the load of the gasification furnace, the gas introduced from the outside is started to serve as fluidization air, the fluidization air enters the feeding tank cone (2) and the ventilation cone (3) of the feeding tank (1) through the air quantity control valve of the conveying pipeline (6) and the corresponding discharge control valve, the coal dust of the feeding tank (1) is fluidized after passing through the air distribution plate (7), and the fluidized coal dust is conveyed to a coal burner under the action of high-pressure conveying air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711322543.5A CN108048137B (en) | 2017-12-12 | 2017-12-12 | Pulverized coal steady-flow conveying device and conveying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711322543.5A CN108048137B (en) | 2017-12-12 | 2017-12-12 | Pulverized coal steady-flow conveying device and conveying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108048137A CN108048137A (en) | 2018-05-18 |
| CN108048137B true CN108048137B (en) | 2023-07-07 |
Family
ID=62131972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711322543.5A Active CN108048137B (en) | 2017-12-12 | 2017-12-12 | Pulverized coal steady-flow conveying device and conveying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108048137B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709196B (en) * | 2018-08-10 | 2024-04-26 | 徐州燃烧控制研究院有限公司 | Pulverized coal combustion system of pneumatic conveying boiler |
-
2017
- 2017-12-12 CN CN201711322543.5A patent/CN108048137B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108048137A (en) | 2018-05-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104498103A (en) | Compound circulating fluidized bed gasification reaction device | |
| CN111763535A (en) | Method and device for preparing fuel gas or synthesis gas by biomass fluidized bed gasification | |
| CN107131518A (en) | A kind of middle warehouse formula medium-speed pulverizer pressurized direct pulverizing coal system | |
| CN108048137B (en) | Pulverized coal steady-flow conveying device and conveying method | |
| CN104593088A (en) | Coal gasification reaction device and method | |
| CN210107373U (en) | Biomass fluidized bed boiler with external bed high-temperature separation mode | |
| CN105441131B (en) | A kind of method of coal gasification lime-ash oxidation and decarbonization ash content coproduction steam | |
| CN205480966U (en) | A circulating fluidized bed boiler bed material addition system for bed is put to outband | |
| CN102213422B (en) | Multi-channel mixed gas burner | |
| CN201206129Y (en) | Gas distributor for pressure circulating fluid bed fine coal gasifying stove | |
| CN204455026U (en) | Combined type circulating fluidized-bed gasification reaction unit | |
| CN208504375U (en) | A kind of low NOx drainage circulating fluidized bed boiler using high nitrogen biomass | |
| CN204607937U (en) | A kind of coal gasification reaction device | |
| CN213272686U (en) | Fuel supply device, combustion system, and boiler system | |
| CN204962736U (en) | Horizontal circulating fluidized bed boiler of area bed material extrinsic cycle | |
| CN210915951U (en) | Coke discharging system | |
| CN103965968B (en) | A kind of powder coal gasification furnace with raise steam device | |
| CN207727037U (en) | A kind of coal dust current stabilization conveying device | |
| CN103727528B (en) | Coal gasification and combustion fluid bed-the coal-powder boiler of series connection compound | |
| CN103687965A (en) | Melting reduction assembly and method for operating a melting reduction assembly | |
| CN108592016B (en) | Low NOx emission circulating fluidized bed boiler for burning high-nitrogen biomass | |
| CN207073832U (en) | A kind of middle warehouse formula medium-speed pulverizer pressurized direct pulverizing coal system | |
| CN206916084U (en) | A kind of solid fuel gasification installation | |
| CN214881305U (en) | Low-calorific-value gas generating device for photovoltaic glass melting furnace | |
| CN205957158U (en) | A boiler that is used for bed material outer circulating device and corresponding of circulating fluidized bed boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |