CN215175214U - Air preheating device for pulverized coal boiler combustion system - Google Patents
Air preheating device for pulverized coal boiler combustion system Download PDFInfo
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- CN215175214U CN215175214U CN202121020094.0U CN202121020094U CN215175214U CN 215175214 U CN215175214 U CN 215175214U CN 202121020094 U CN202121020094 U CN 202121020094U CN 215175214 U CN215175214 U CN 215175214U
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 239000003245 coal Substances 0.000 title claims abstract description 15
- 239000002893 slag Substances 0.000 claims abstract description 10
- 238000005485 electric heating Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- 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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model provides an air preheating device for pulverized coal boiler combustion system, its characterized in that: including forced draught blower, preheater, air bleed pipeline, hot air pipeline and converging flow pipe way, the preheater include casing and the built-in spiral pipeline in the casing, spiral pipeline link to each other with the one end of installing the tee bend pipeline in the casing, the other both ends of tee bend pipeline respectively be connected with a converging flow pipe way, converging flow pipe way and tee bend pipeline between be provided with automatic pressure valve, converging flow pipe way keep away from the one end of tee bend pipeline and link to each other with the forced draught blower, the forced draught blower link to each other with the one end of air bleed pipeline, the other end of air bleed pipeline on install the filter screen, the hot air export at hot air pipeline's one end and slag extractor top link to each other. The design has the advantages of simple structure, easy manufacture, practicality and high efficiency.
Description
Technical Field
The utility model relates to a pulverized coal fired boiler combustion technology field, specificly relate to an air preheating device for pulverized coal fired boiler combustion system.
Background
The main production links of a thermal power plant can be roughly divided into: the method comprises the following steps of fuel entering and furnace entering, water treatment, coal powder preparation, boiler combustion, steam production and consumption, steam turbine set power generation, electric power transmission and the like, and the problem of energy loss exists in any main production link in the power generation process. In particular, in the boiler combustion link, air conveyed into a boiler needs to be preheated in order to save resources and reduce energy loss in the boiler combustion process, and a slag extractor needs to cool discharged hot slag through cold air in the slag extraction process, and the heated air is often directly discharged in the cooling process, so that great energy waste is caused; the existing boiler usually introduces air directly through a draught fan for combustion, thereby causing unnecessary energy loss, and therefore, the design of an air preheating device for a pulverized coal boiler combustion system is very important.
Disclosure of Invention
The utility model provides an air preheating device for pulverized coal boiler combustion system, through the hot-air that heaies up after cooling off hot slag to natural air together carry into the boiler and burn after preheating, played resources are saved and energy utilization's effect is improved.
In order to solve the technical problem, the utility model provides an air preheating device for pulverized coal boiler combustion system, its characterized in that: the device comprises a blower, a preheater, an air bleed pipeline, a hot air conveying pipeline and a converging pipeline, wherein the preheater comprises a shell and a spiral pipeline which is arranged in the shell, the spiral pipeline is connected with one end of a three-way pipeline which is arranged in the shell, the other two ends of the three-way pipeline are respectively connected with the converging pipeline, an automatic pressure valve is arranged between the converging pipeline and the three-way pipeline, one end of the converging pipeline, which is far away from the three-way pipeline, is connected with the blower, the blower is connected with one end of the air bleed pipeline, the other end of the air bleed pipeline is provided with a filter screen, the air bleed pipeline is also provided with a flowmeter, one end of the hot air conveying pipeline is connected with a hot air outlet at the top of a slag extractor, and the other end of the hot air conveying pipeline is communicated with the air bleed pipeline, the confluence pipeline is also connected with a pressure gauge.
Further: the automatic pressure valve comprises a first valve barrel, a second valve barrel, a valve core and a first spring, wherein the first valve barrel is a valve body with one open end and one sealed end, the open end of the first valve barrel is connected with a confluence pipeline, the first spring is arranged between the valve core and the sealed end in the first valve barrel in a piston type connection mode, one end of the second valve barrel is fixed on the outer side of the first valve barrel and is sealed with the first valve barrel, a gap is reserved between the inner wall of the second valve barrel and the outer wall of the first valve barrel, the other end of the second valve barrel is connected to a three-way pipeline, a flow guide channel is formed in the side wall of the first valve barrel, and the flow guide channel is communicated with the gap between the first valve barrel and the second valve barrel and is sealed through the valve core.
And further: an electric cylinder is fixed at one sealed end of the first valve cylinder, the output shaft end of the electric cylinder extends into the first valve cylinder and is connected with an adjusting plate, and the valve core is connected to the adjusting plate through a first spring.
And further: the inner wall of the first valve barrel between the diversion channel and the sealed end of the first valve barrel is provided with a groove, the groove is connected with a trapezoidal fixture block through a second spring, the outer wall of the valve core is provided with a clamping groove matched with the trapezoidal fixture block, and the trapezoidal fixture block is clamped into the clamping groove under the action of the second spring.
And further: the electric heating pipe and the temperature sensor are detachably mounted in the shell of the preheater, the temperature display screen is mounted on the outer wall of the shell in an embedded mode, and the temperature display screen is electrically connected with the temperature sensor in the shell.
After the structure is adopted, the utility model preheats the natural air by the hot air which heats up after cooling the hot slag and then conveys the natural air into the boiler for combustion, thereby playing the roles of saving resources and improving the energy utilization rate; and the design also has the advantages of simple structure, easy manufacture, practicality and high efficiency.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an internal structural view of the automatic pressure valve.
Fig. 3 is an enlarged view of a in fig. 2.
Detailed Description
An air preheating device for a pulverized coal boiler combustion system as shown in fig. 1 comprises a blower 2, a preheater 1, an air bleed pipeline 3, a hot air conveying pipeline 4 and a confluence pipeline 8, wherein the preheater comprises a shell and a spiral pipeline arranged in the shell, the spiral pipeline is connected with one end of a three-way pipeline arranged in the shell, the other two ends of the three-way pipeline are respectively connected with the confluence pipeline, an automatic pressure valve is arranged between the confluence pipeline and the three-way pipeline, one end of the confluence pipeline, far away from the three-way pipeline, is connected with the blower, the blower is connected with one end of the air bleed pipeline, the other end of the air bleed pipeline is provided with a filter screen 5, the air bleed pipeline is also provided with a flowmeter 7, one end of the hot air conveying pipeline is connected with a hot air outlet at the top of a slag extractor, the other end of the hot air conveying pipeline is communicated with the air bleed pipeline, and the confluence pipeline is also connected with a pressure gauge. The utility model has the advantages that the hot air which heats up after cooling the hot slag is preheated to the natural air and then is conveyed into the boiler to be combusted, thereby saving resources and improving the energy utilization rate; and the design also has the advantages of simple structure, easy manufacture, practicality and high efficiency.
The automatic pressure valve shown in fig. 2 comprises a first valve cylinder 9, a second valve cylinder 10, a valve core 11 and a first spring 13, wherein the first valve cylinder is a valve body with one open end and one sealed end, the open end of the first valve cylinder is connected with a confluence pipeline, the valve core is connected in the first valve cylinder in a piston mode, the first spring is arranged between the valve core and the sealed end in the first valve cylinder, one end of the second valve cylinder is fixed on the outer side of the first valve cylinder and is sealed with the first valve cylinder, a gap is reserved between the inner wall of the second valve cylinder and the outer wall of the first valve cylinder, the other end of the second valve cylinder is connected with a three-way pipeline, a flow guide channel 12 is arranged on the side wall of the first valve cylinder, and the flow guide channel is communicated with the gap between the first valve cylinder and the second valve cylinder and is sealed through the valve core. When the air feeder works, the pressure in the confluence pipeline can be continuously increased until the valve core extrudes the first spring to open the diversion channel, at the moment, cold air and discharged hot air can be conveyed into the spiral pipeline of the preheater together, the cold air is heated through the discharged hot air, and the heating time of the discharged hot air to the cold air in the preheater is prolonged through the design of the spiral pipeline.
An electric cylinder 15 is fixed at one end of the first valve cylinder seal shown in fig. 2, the output shaft end of the electric cylinder extends into the first valve cylinder and is connected with an adjusting plate 14, and the valve core is connected with the adjusting plate through a first spring. The utility model discloses an adopt this design not only can adjust the elasticity of first spring, can make the case reply the normal position through gas moreover and continue to seal the water conservancy diversion passageway.
As shown in fig. 2 and 3, a groove 17 is formed in the inner wall of the first valve barrel between the diversion channel and the sealed end of the first valve barrel, the groove is connected with a trapezoidal fixture block 19 through a second spring 18, a clamping groove 16 matched with the trapezoidal fixture block is formed in the outer wall of the valve core, and the trapezoidal fixture block is clamped into the clamping groove under the action of the second spring.
Electric heating pipe and temperature sensor are still installed to still detachably in the casing of this design preheater, the outer wall of casing on still install the temperature display screen with embedded, temperature display screen and casing in the temperature sensor electricity be connected.
Claims (5)
1. The utility model provides an air preheating device for pulverized coal fired boiler combustion system which characterized in that: comprises a blower (2), a preheater (1), an air bleed pipeline (3), a hot air conveying pipeline (4) and a converging pipeline (8), wherein the preheater comprises a shell and a spiral pipeline which is arranged in the shell, the spiral pipeline is connected with one end of a three-way pipeline which is arranged in the shell, the other two ends of the three-way pipeline are respectively connected with the converging pipeline, an automatic pressure valve is arranged between the converging pipeline and the three-way pipeline, one end of the converging pipeline, which is far away from the three-way pipeline, is connected with the blower, the blower is connected with one end of the air bleed pipeline, the other end of the air bleed pipeline is provided with a filter screen (5), the air bleed pipeline is also provided with a flowmeter (7), one end of the hot air conveying pipeline is connected with a hot air outlet at the top of a slag extractor, the other end of the hot air conveying pipeline is communicated with the air bleed pipeline, and the confluence pipeline is also connected with a pressure gauge.
2. An air preheating device for a pulverized coal boiler combustion system according to claim 1, characterized in that: the automatic pressure valve comprises a first valve cylinder (9), a second valve cylinder (10), a valve core (11) and a first spring (13), wherein the first valve cylinder is a valve body with one open end and one sealed end, the open end of the first valve cylinder is connected with a confluence pipeline, the valve core is connected in the first valve cylinder in a piston mode and is provided with the first spring between the first valve cylinder and the sealed end of the first valve cylinder, one end of the second valve cylinder is fixed on the outer side of the first valve cylinder and is sealed with the first valve cylinder, a gap is reserved between the inner wall of the second valve cylinder and the outer wall of the first valve cylinder, the other end of the second valve cylinder is connected to a three-way pipeline, a flow guide channel (12) is formed in the side wall of the first valve cylinder, and the flow guide channel is communicated with the gap between the first valve cylinder and the second valve cylinder and is sealed through the valve core.
3. An air preheating device for a pulverized coal boiler combustion system according to claim 2, characterized in that: an electric cylinder (15) is fixed at one sealed end of the first valve cylinder, the output shaft end of the electric cylinder extends into the first valve cylinder and is connected with an adjusting plate (14), and the valve core is connected to the adjusting plate through a first spring.
4. An air preheating device for a pulverized coal boiler combustion system according to claim 2, characterized in that: the valve core is characterized in that a groove (17) is formed in the inner wall of the first valve barrel between the diversion channel and the sealed end of the first valve barrel, the groove is connected with a trapezoidal fixture block (19) through a second spring (18), a clamping groove (16) matched with the trapezoidal fixture block is formed in the outer wall of the valve core, and the trapezoidal fixture block is clamped into the clamping groove under the action of the second spring.
5. An air preheating device for a pulverized coal boiler combustion system according to claim 1, characterized in that: the electric heating pipe and the temperature sensor are detachably mounted in the shell of the preheater, the temperature display screen is mounted on the outer wall of the shell in an embedded mode, and the temperature display screen is electrically connected with the temperature sensor in the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121020094.0U CN215175214U (en) | 2021-05-13 | 2021-05-13 | Air preheating device for pulverized coal boiler combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121020094.0U CN215175214U (en) | 2021-05-13 | 2021-05-13 | Air preheating device for pulverized coal boiler combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215175214U true CN215175214U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121020094.0U Active CN215175214U (en) | 2021-05-13 | 2021-05-13 | Air preheating device for pulverized coal boiler combustion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215175214U (en) |
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2021
- 2021-05-13 CN CN202121020094.0U patent/CN215175214U/en active Active
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