CN113339836A - Sweeping device for heat storage element of rotary air preheater - Google Patents
Sweeping device for heat storage element of rotary air preheater Download PDFInfo
- Publication number
- CN113339836A CN113339836A CN202110641245.2A CN202110641245A CN113339836A CN 113339836 A CN113339836 A CN 113339836A CN 202110641245 A CN202110641245 A CN 202110641245A CN 113339836 A CN113339836 A CN 113339836A
- Authority
- CN
- China
- Prior art keywords
- storage element
- heat storage
- air
- air preheater
- supply pipeline
- 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.)
- Pending
Links
- 238000005338 heat storage Methods 0.000 title claims abstract description 37
- 238000010408 sweeping Methods 0.000 title description 2
- 238000010438 heat treatment Methods 0.000 claims abstract description 30
- 238000010926 purge Methods 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 11
- 239000003546 flue gas Substances 0.000 description 11
- 239000000443 aerosol Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 239000004071 soot Substances 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2700/00—Ash removal, handling and treatment means; Ash and slag handling in pulverulent fuel furnaces; Ash removal means for incinerators
- F23J2700/001—Ash removal, handling and treatment means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
Abstract
The embodiment of the invention provides a purging device for a heat storage element of a rotary air preheater, which comprises: the air preheater, and a heat storage element, a compressed air storage tank, a nozzle, an air supply pipeline, a driving device, a bypass pipe and a heating device which are arranged in the air preheater; one end of the air supply pipeline is communicated with the inside of the air preheater and is positioned at the lower part of the heat storage element, and the other end of the air supply pipeline is communicated with a steam supply main pipe of the compressed air storage tank; the driving device and the heating device are both arranged on the air supply pipeline, and the heating device is close to one side of the compressed air tank; and two ends of the bypass pipe are connected to the gas supply pipeline and are positioned on two sides of the heating device. Compressed air comes out from the heating device, blows out from the nozzle through the air supply pipeline and sweeps the heat storage element of the air preheater, so that the effect of clearing away dust accumulated on the heat storage element at the cold end of the air preheater is achieved, and the resistance of the heat storage element of the air preheater is reduced.
Description
Technical Field
The invention relates to the technical field of thermal power plants, in particular to a purging device for a heat storage element of a rotary air preheater.
Background
The left half part and the right half part of the rotary air preheater of the boiler in the thermal power plant are respectively provided with a flue gas channel and an air channel. When the flue gas flows through the flue gas side rotor of the air preheater, the flue gas releases heat to the heat storage element of the air preheater, and the temperature of the flue gas is reduced; when the heated air preheater heat storage element rotates to the air side, heat is released to the air again and the air temperature rises. The circulation is repeated in this way, and the heat exchange between the smoke and the air is realized.
During the operation of the rotary air preheater of the boiler in the thermal power plant, the temperature range of certain aerosol in the flue gas from gas state to liquid state is just in the middle temperature section and the low temperature section of the air preheater, the aerosol in the flue gas can be liquefied into a substance with strong viscosity in the heat storage element of the middle temperature section of the air preheater, fly ash is bonded in the flue gas, and the heat storage element of the air preheater is accumulated with ash and is blocked, so that the service life of the heat storage element of the air preheater is shortened. The existing boiler air preheater of the thermal power plant is provided with steam soot blowing devices at the cold and hot ends of the flue gas side, soot blowing steam is easier to be adhered to accumulated dust with aerosol condensation in the flue gas at the cold end of the air preheater, and the cleaning effect is poor.
Disclosure of Invention
The invention provides a purging device for a heat storage element of a rotary air preheater, and aims to solve the problems that steam soot blowing devices are arranged at the cold end and the hot end of an existing boiler air preheater of a thermal power plant, soot blowing steam is easier to dewfall and adhere to soot with aerosol in smoke at the cold end of the air preheater, and the cleaning effect is poor. "is used in the above-mentioned patent publication. In order to achieve the purpose, the invention adopts the following technical scheme:
a rotary air preheater heat storage element purging apparatus comprising: the heat storage element, the compressed air storage tank, the nozzle, the air supply pipeline, the driving device, the bypass pipe and the heating device are arranged in the air preheater;
one end of the air supply pipeline is communicated with the inside of the air preheater and is positioned at the lower part of the heat storage element, and the other end of the air supply pipeline is communicated with the compressed air storage;
the driving device and the heating device are both arranged on the air supply pipeline, and the heating device is close to one side of the compressed air tank; and two ends of the bypass pipe are connected to the gas supply pipeline and are positioned on two sides of the heating device.
Further, a first valve and a second valve are included, the first valve being mounted on the bypass pipe; the second valve is mounted on the gas supply line between the heating device and one end of the bypass pipe.
Further, the nozzle is a torrent nozzle.
Further, the heating device is an air heater.
Further, a thermometer is included for monitoring the temperature of the air heater.
Further, the driving device is a motor with a speed reduction device.
Further, the device also comprises a control device, and the control device is connected with the driving device and the heating device. Compared with the prior art, the invention has the following advantages;
the purging device for the heat storage element of the rotary air preheater provided by the invention is provided with the purging device, compressed air is blown out of the compressed air storage tank and is blown out of the nozzle through the air supply pipeline to purge the heat storage element of the air preheater, so that the effect of clearing away dust accumulated on the heat storage element at the cold end of the air preheater is achieved, the clearing effect is good, and the resistance of the heat storage element of the air preheater is reduced.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions, and the advantageous effects brought by the technical features of the technical solutions described above, other technical problems that the present invention can solve, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be described in further detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic structural diagram of a purging device for a heat storage element of a rotary air preheater according to an embodiment of the present invention.
Reference numerals:
1. an air preheater; 2. a nozzle; 3. a gas supply duct; 4. a drive device; 5. a first valve; 6. a bypass pipe; 7. a heating device; 8. a second valve; 9. a compressed air storage tank.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a purging device for a heat storage element of a rotary air preheater 1, including: a compressed air storage tank 9, a nozzle 2, an air supply pipeline 3, a driving device 4, a bypass pipe 6 and a heating device 7;
one end of the air supply pipeline 3 is communicated with the inside of the air preheater 1 and is positioned at the lower part of the heat storage element, and the other end of the air supply pipeline 3 is communicated with the compressed air storage.
The driving device 4 and the heating device 7 are both arranged on the air supply pipeline 3, and the heating device 7 is close to one side of the compressed air tank; the two ends of the bypass pipe 6 are connected to the gas supply pipeline 3 and are positioned at two sides of the heating device 7.
It should be noted that the heat storage element has a cold end and a hot end, and the dust in the flue gas is generally condensed at the cold end, so the nozzle 2 is located below the cold end for blowing the dust at the cold end. The heating device 7 heats the compressed air to high temperature, and the high temperature compressed air is the compressed air which is higher than the gasification temperature of the aerosol, so that the aerosol adhered to the cold end is gasified and taken away, namely the smoke and dust impurities at the cold end are removed conveniently. The driving device 4 is used for specifically pressurizing and controlling the compressed air, the temperature of the hot end of the heat storage element is high in a rotary heat exchange mode, the heat storage element is basically not stained with smoke dust impurities, and if the hot end is also purged, the temperature of the hot end can be changed, so that the use requirement can not be met, and therefore, the cold end can be purged through the control of the driving device 4 according to the rotation period of the heat storage element; the compressed air tank and the air preheater 1 are boiler systems of a thermal power plant, and belong to the prior art. A bypass pipe 6 is provided, and the blowing device can blow out standard compressed air.
Specifically, the device also comprises a first valve 5 and a second valve 8, wherein the first valve 5 is arranged on the bypass pipe 6; the second valve 8 is mounted on the supply duct 3 between the heating means 7 and one end of the bypass duct 6. The first valve 5 and the second valve 8 are arranged, and compressed air can be switched conveniently according to requirements.
Specifically, the nozzle 2 is a torrent nozzle. The spraying is concentrated, which is beneficial to removing impurities.
Specifically, the heating device 7 is an air heater. Also included is a thermometer for monitoring the temperature of the air heater. The driving device 4 is a booster fan. The device also comprises a control device which is connected with the driving device 4 and the heating device 7.
It should be noted that the control device may be a DCS control system or a single chip microcomputer. The control device is electrically connected with the blowing device, so that the stainless steel electric heating pipe of the air heater heats the compressed air. The control device is electrically connected with the motor with the speed reducer, so that the motor with the speed reducer drives the nozzle to perform linear motion, and compressed air blown out of the nozzle 2 is used for removing impurities at the cold end; certainly, the pressure of the compressed air can blow down smoke and dust impurities at the cold end, and the motor with the speed reducer stops running after the resistance of the air preheater is reduced. A thermometer is used to monitor the temperature of the air heater.
The working principle is as follows:
the setting sweeps the device, closes first valve 5, opens second valve 8, starts heating device 7, and compressed air comes out from compressed air holding vessel 9, through air supply line 3, blows off from nozzle 2, utilizes being heated to the high temperature compressed air above the aerosol vaporization temperature to continuously sweep the heat accumulation component of air heater 1, reaches the effect of the cold junction deposition of cleaing away the heat accumulation component to reduce the resistance of air heater heat accumulation component. .
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A rotary air preheater heat storage element purging device, comprising: the device comprises a nozzle, an air supply pipeline, a driving device, a bypass pipe and a heating device;
one end of the air supply pipeline is communicated with the inside of the air preheater and is positioned at the lower part of the heat storage element, and the other end of the air supply pipeline is communicated with the compressed air storage;
the driving device and the heating device are both arranged on the air supply pipeline, and the heating device is close to one side of the compressed air tank; and two ends of the bypass pipe are connected to the gas supply pipeline and are positioned on two sides of the heating device.
2. A rotary air preheater heat storage element purge apparatus as claimed in claim 1, further comprising a first valve and a second valve, said first valve being mounted on said bypass line; the second valve is mounted on the gas supply line between the heating device and one end of the bypass pipe.
3. A rotary air preheater heat storage element purge apparatus as claimed in claim 1, wherein said nozzles are flood nozzles.
4. A rotary air preheater heat storage element purge apparatus as claimed in claim 1, wherein said heating means is an air heater.
5. A rotary air preheater heat storage element purge apparatus as claimed in claim 1, further comprising a temperature gauge for monitoring the temperature of the heating means.
6. A rotary air preheater heat storage element purge apparatus as claimed in claim 1, wherein said drive means is an electric motor with speed reduction means.
7. A rotary air preheater heat storage element purge apparatus as claimed in claim 1, further comprising a control means, said control means commanding operation of said drive means, said drive means being connected to said drive means and said heating means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110641245.2A CN113339836A (en) | 2021-06-09 | 2021-06-09 | Sweeping device for heat storage element of rotary air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110641245.2A CN113339836A (en) | 2021-06-09 | 2021-06-09 | Sweeping device for heat storage element of rotary air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113339836A true CN113339836A (en) | 2021-09-03 |
Family
ID=77475662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110641245.2A Pending CN113339836A (en) | 2021-06-09 | 2021-06-09 | Sweeping device for heat storage element of rotary air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113339836A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201426983Y (en) * | 2009-05-22 | 2010-03-24 | 广州安能特电气设备有限公司 | Nitrogen purging evaporator |
| CN110094752A (en) * | 2019-05-29 | 2019-08-06 | 西安热工研究院有限公司 | A kind of automatic control air preheater sealing and anti-blocking system and control method |
| CN110160080A (en) * | 2019-05-13 | 2019-08-23 | 南京兆能节能科技有限公司 | A kind of rotary regenerative air preheater boosting type control block apparatus and its control blocking method |
| CN110513712A (en) * | 2019-07-10 | 2019-11-29 | 华电电力科学研究院有限公司 | A method of prevent air preheater from blocking using pulse of compressed air soot blowing |
| CN213300127U (en) * | 2020-10-14 | 2021-05-28 | 国家能源集团谏壁发电厂 | Boiler air heater sector plate deposition sweeps device |
-
2021
- 2021-06-09 CN CN202110641245.2A patent/CN113339836A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201426983Y (en) * | 2009-05-22 | 2010-03-24 | 广州安能特电气设备有限公司 | Nitrogen purging evaporator |
| CN110160080A (en) * | 2019-05-13 | 2019-08-23 | 南京兆能节能科技有限公司 | A kind of rotary regenerative air preheater boosting type control block apparatus and its control blocking method |
| CN110094752A (en) * | 2019-05-29 | 2019-08-06 | 西安热工研究院有限公司 | A kind of automatic control air preheater sealing and anti-blocking system and control method |
| CN110513712A (en) * | 2019-07-10 | 2019-11-29 | 华电电力科学研究院有限公司 | A method of prevent air preheater from blocking using pulse of compressed air soot blowing |
| CN213300127U (en) * | 2020-10-14 | 2021-05-28 | 国家能源集团谏壁发电厂 | Boiler air heater sector plate deposition sweeps device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210903 |
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| RJ01 | Rejection of invention patent application after publication |