CN115234911A - Rotary heat exchange non-reversing type heat storage combustion system applied to rectifying tower - Google Patents
Rotary heat exchange non-reversing type heat storage combustion system applied to rectifying tower Download PDFInfo
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- CN115234911A CN115234911A CN202210716523.0A CN202210716523A CN115234911A CN 115234911 A CN115234911 A CN 115234911A CN 202210716523 A CN202210716523 A CN 202210716523A CN 115234911 A CN115234911 A CN 115234911A
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- rectifying tower
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 28
- 238000005338 heat storage Methods 0.000 title abstract description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 124
- 239000003546 flue gas Substances 0.000 claims abstract description 124
- 239000007789 gas Substances 0.000 claims abstract description 93
- 239000000779 smoke Substances 0.000 claims abstract description 55
- 239000007921 spray Substances 0.000 claims abstract description 24
- 238000005192 partition Methods 0.000 claims description 21
- 238000009825 accumulation Methods 0.000 claims description 16
- 239000002737 fuel gas Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 abstract description 5
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000000428 dust Substances 0.000 description 18
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 7
- 239000011701 zinc Substances 0.000 description 7
- 229910052725 zinc Inorganic materials 0.000 description 7
- 239000011449 brick Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001698 pyrogenic effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
- F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/72—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with backwash arms, shoes or nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a rotary heat exchange non-reversing heat storage combustion system applied to a rectifying tower, which comprises a gas supply system, an air supply system, a flue gas discharge system and a heat exchanger, wherein the gas supply system is connected with the gas supply system; the gas supply system comprises a gas pipeline, a gas filter, a gas pressure reducing valve and spray guns, the spray guns are connected with the gas pipeline, the spray guns are arranged in the rectifying tower in a row, the air supply system comprises an air pipeline and a blower, and the air pipeline is communicated to the rectifying tower; the smoke discharge system comprises a smoke pipeline and a smoke induced draft fan, and the smoke pipeline is communicated to the rectifying tower; the air pipeline and the flue gas pipeline are both connected with a heat exchanger; the heat storage combustion system improves the gas supply system, realizes multi-stage gas supply, and ensures that each stage of gas is fully mixed and combusted with the corresponding stage of air, thereby avoiding the decomposition and carbonization of the gas in a high-temperature environment, improving the combustion efficiency and reducing the energy consumption.
Description
Technical Field
The invention relates to the field of pyrometallurgical zinc smelting, in particular to a rotary heat exchange non-reversing type heat storage combustion system applied to a rectifying tower.
Background
In the pyrometallurgical zinc smelting process, a rectifying tower is required to be used for carrying out pyrogenic purification on crude zinc, impurities such as lead, cadmium, iron and the like in the crude zinc are removed to obtain rectified zinc (pure zinc), the rectifying tower generally uses gas such as coal gas to carry out flame-proof heating on crude zinc liquid in an internal silicon carbide tower tray, and an air supply system is arranged in the rectifying tower to support combustion by the gas; in order to save energy, high-temperature flue gas discharged from the rectifying tower exchanges heat with combustion-supporting air through the heat exchanger, so that the combustion-supporting air enters the rectifying tower at a higher temperature. The matching system of the rectifying tower in the prior art has the following defects: 1. the gas inlet mode is unreasonable, the existing gas is only fed from the upper part of the primary air channel of the rectifying tower, the gas is firstly mixed and combusted with the primary air, and the unburnt gas flows downwards along the hearth to be sequentially mixed and combusted with the secondary air and the tertiary air under the negative pressure of the hearth; in the process, fuel gas is not fully combusted, and the phenomenon of cracking and decomposition to form carbonization is easily caused in a high-temperature environment, so that fuel waste is caused by carbonization, and meanwhile, a carbon layer is formed on the surface of a tower tray or a refractory material, so that heat conduction is hindered, the energy consumption of equipment is further increased, and the heat utilization efficiency is reduced; 2. the sleeve brick heat exchange chamber is used as a heat exchanger, the self sealing performance of the sleeve bricks is poor, air is easily leaked into smoke, the overall heat exchange efficiency is poor, the temperature of the preheated air in the sleeve brick heat exchange chamber is about 550 ℃, the smoke exhaust temperature is 500-600 ℃, and the heat utilization rate is only about 25% -30%.
Disclosure of Invention
The invention aims to solve the technical problems that the gas inlet mode of a matching system of the rectifying tower in the prior art is unreasonable and the heat utilization rate of a sleeve brick heat exchange chamber is low.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a rotary heat exchange non-reversing heat storage combustion system applied to a rectifying tower comprises a gas supply system, an air supply system, a flue gas exhaust system and a heat exchanger;
the gas supply system comprises a gas pipeline, a gas filter, a gas pressure reducing valve and spray guns, wherein the gas filter and the gas pressure reducing valve are installed in the gas pipeline, the spray guns are connected with the gas pipeline, the spray guns are arranged in a rectifying tower in rows, a plurality of spray guns in each row of spray guns are aligned up and down and distributed at different heights of the rectifying tower, generally, the number of the spray guns in each row is consistent with that of air passages in the rectifying tower, and one spray gun is arranged above or below the air passages;
the air supply system comprises an air pipeline and a blower, the blower is connected with the air pipeline, and the air pipeline is communicated to the rectifying tower;
the smoke exhaust system comprises a smoke pipeline and a smoke induced draft fan, the smoke induced draft fan is connected with the smoke pipeline, and the smoke pipeline is communicated to the rectifying tower; the air pipeline and the flue gas pipeline are both connected with a heat exchanger, and the air in the air pipeline and the flue gas in the flue gas pipeline generate heat exchange in the heat exchanger.
The heat storage combustion system improves the gas supply system, realizes multi-stage gas supply, and ensures that each stage of gas is fully mixed and combusted with the corresponding stage of air, thereby avoiding the decomposition and carbonization of the gas in a high-temperature environment, improving the combustion efficiency and reducing the energy consumption.
Further, the heat exchanger comprises an outer cylinder, a rotating shaft, a partition plate and a heat accumulator, wherein the rotating shaft is installed inside the outer cylinder, the partition plate is installed on the rotating shaft and divides the inside of the outer cylinder into at least two gas circulation areas, the heat accumulator is located on the partition plate, and the air pipeline and the flue gas pipeline are respectively communicated with different gas circulation areas; the rotating shaft drives the partition plate and the heat accumulator to rotate, so that the heat accumulator rotates in different gas circulation areas, and when the heat accumulator is in the gas circulation area where the flue gas pipeline is located, the heat accumulator absorbs heat; when the heat accumulator is in the gas circulation area where the air pipeline is located, the heat accumulator releases heat and heats air; the heat accumulator directly contacts with the flue gas and the air, so that the heat exchange efficiency can be obviously improved, the traditional preheated air is improved to be more than 850 ℃ from 500 ℃, the flue gas temperature is reduced to be about 200 ℃ from the traditional 550 ℃, and the fuel can be saved by 20-30%.
The flue gas discharged from the rectifying tower inevitably contains some dust which can be attached to the partition boards, the heat accumulator and the inner wall of the outer cylinder, and in order to prevent the dust from entering an air pipeline along with the heat accumulator, the partition boards are arranged into a cross shape, the partition boards divide four gas circulation areas in the outer cylinder, and the four gas circulation areas are respectively called a first flue gas circulation area, a second flue gas circulation area, a first air circulation area and a second air circulation area along the rotation direction of the rotating shaft;
the air pipeline comprises a first air inlet pipe, a second air inlet pipe, a third air inlet pipe, a first air outlet pipe and a second air outlet pipe, the first air inlet pipe and the first air outlet pipe are communicated with the first air circulation region, the second air inlet pipe and the second air outlet pipe are communicated with the second air circulation region, and the third air inlet pipe is communicated with the second smoke circulation region;
the flue gas pipeline comprises a first flue gas inlet pipe, a second flue gas inlet pipe, a first flue gas outlet pipe, a second flue gas outlet pipe and a flue gas return pipe, the first flue gas inlet pipe and the first flue gas outlet pipe are communicated to the first flue gas circulation area, and the second flue gas inlet pipe and the second flue gas outlet pipe are communicated to the second flue gas circulation area; the flue gas return pipe is connected with the first flue gas inlet pipe and the second flue gas inlet pipe, and a return valve is arranged in the flue gas return pipe;
in the invention, the heat accumulator firstly carries out primary heating in a first flue gas flow region and then enters a second flue gas flow region for secondary heating, and the heat accumulator is inevitably stained with dust; then, the second flue gas inlet pipe is closed, fresh air is blown into the second flue gas circulation area through the third air inlet pipe, and the fresh air with dust on the heat accumulator enters the first flue gas inlet pipe and the first flue gas circulation area through the flue gas return pipe; after the thermal mass is cleaned, the shaft rotates to bring the thermal mass into the first air flow region, which heats the air.
When the heat exchanger works, the first smoke circulation area, the second smoke circulation area, the first smoke inlet pipe and the second smoke inlet pipe are inevitably attached with dust, so that a production unit needs to clean the heat exchanger and the smoke pipelines regularly. Because the smoke return pipe is arranged, part of dust in the second smoke circulation area is led into the first smoke circulation area for a long time, the speed of dust accumulation in the first smoke circulation area is far higher than that in the second smoke circulation area, and the unbalanced dust accumulation can increase the cleaning frequency of a production unit; in order to overcome the problem, the smoke return pipe is also provided with a smoke filter and a reverse inflation pipe, wherein the smoke filter comprises a shell and a filter screen positioned in the shell, the reverse inflation pipe is connected with an external air source, and a reverse inflation valve is arranged on the reverse inflation pipe; the smoke filter is positioned between the second smoke inlet pipe and the air return valve, and the reverse inflation pipe is positioned between the smoke filter and the air return valve;
the smoke filter can filter dust, and the dust in the second smoke circulation area is prevented from entering the first smoke circulation area; and in the period of non-working of the flue gas return pipe, the air return valve is closed, the reverse inflation pipe inflates air into the flue gas return pipe at the moment, the air flow is used for reversely inflating the filter screen, dust on the filter screen is flushed back to the second flue gas circulation area again, and most of the reversely inflated dust is discharged along with the flue gas.
Further, the heat accumulator is made of honeycomb ceramics, and a heat insulation layer wraps the outer surface of the outer cylinder.
Further, the gas supply system further comprises a pressure gauge, a gas flowmeter, a pressure switch and a gas electric regulating valve which are arranged on the gas pipeline, the air supply system further comprises a pressure transmitter and an air V-cone flowmeter which are arranged on the air pipeline, and the flue gas discharging system further comprises a thermocouple arranged on the flue gas pipeline.
Has the advantages that: (1) The rotary heat exchange non-reversing heat storage combustion system realizes multi-stage supply of fuel gas, and the fuel gas at each stage is fully mixed and combusted with the air at the corresponding stage, so that the decomposition and carbonization phenomena of the fuel gas in a high-temperature environment are avoided, the combustion efficiency is improved, and the energy consumption is reduced. (2) According to the rotary heat exchange non-reversing heat accumulation combustion system, the heat accumulator in the second flue gas circulation area is subjected to air purging by using the third air outlet pipe, so that dust is prevented from entering the first air circulation area and the second air circulation area, and combustion-supporting air entering the rectifying tower is cleaner. (3) According to the rotary heat exchange non-reversing heat accumulation combustion system, the flue gas filter is arranged in the flue gas return pipe, so that the phenomenon that the dust accumulation speed of a first flue gas circulation area is too high is avoided, and the cleaning frequency required by the system is reduced. (4) According to the rotary heat exchange non-reversing heat accumulation combustion system, the reverse inflation pipe is arranged in the flue gas return pipe, the filter screen is cleaned by utilizing reverse airflow, and the working efficiency of the flue gas filter is guaranteed.
Drawings
Fig. 1 is a block diagram of a gas supply system in embodiment 1.
Fig. 2 is a block diagram of a flue gas discharge system and an air supply system in embodiment 1.
Fig. 3 is a sectional view of the heat exchanger in embodiment 1.
Fig. 4 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 3.
Fig. 5 is a sectional view B-B of fig. 4.
Fig. 6 is an enlarged view a of fig. 5.
Fig. 7 is a cross-sectional view C-C of fig. 4.
FIG. 8 is a schematic view showing the installation of the spray gun in the rectifying tower in example 1.
Wherein: 100. a gas supply system; 110. a gas pipeline; 120. a gas filter; 130. a gas pressure reducing valve; 140. a spray gun; 150. a pressure gauge; 160. a gas flow meter; 170. a pressure switch; 180. a gas electric regulating valve; 200. an air supply system; 210. an air line; 211. a first air intake duct; 212. a second air intake duct; 213. a third air intake duct; 214. a first air outlet pipe; 215. a second air outlet pipe; 220. a blower; 230. a pressure transmitter; 240. an air V-cone flow meter; 300. a flue gas discharge system; 310. a flue gas pipeline; 311. a first flue gas inlet pipe; 312. a second flue gas inlet pipe; 313. a first flue gas outlet pipe; 314. a second flue gas outlet pipe; 315. a flue gas return pipe; 320. a flue gas induced draft fan; 330. a thermocouple; 340. a return air valve; 350. a flue gas filter; 351. a housing; 352. a filter screen; 360. a reverse inflation tube; 370. a reverse inflation valve; 400. a heat exchanger; 410. an outer cylinder; 411. a first flue gas flow-through zone; 412. a second flue gas flow-through zone; 413. a first air circulation zone; 414. a second air flow area; 420. a rotating shaft; 430. a partition plate; 440. a heat accumulator; 450. a thermal insulation layer; 500. a rectifying tower; 510. an air passage.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1
As shown in fig. 1 to 7, the rotary heat exchange non-reversing heat storage combustion system applied to the rectifying tower in the present embodiment includes a fuel gas supply system 100, an air supply system 200, a flue gas discharge system 300 and a heat exchanger 400;
the gas supply system 100 comprises a gas pipeline 110, a gas filter 120, a gas pressure reducing valve 130, spray guns 140, a pressure gauge 150, a gas flow meter 160, a pressure switch 170 and a gas electric regulating valve 180, wherein the gas filter 120, the gas pressure reducing valve 130, the pressure gauge 150, the gas flow meter 160, the pressure switch 170 and the gas electric regulating valve 180 are all installed in the gas pipeline 110, the spray guns 140 are connected with the gas pipeline 110, the spray guns 140 are arranged in a rectifying tower 500 in a row, a plurality of spray guns 140 in each row of spray guns 140 are aligned up and down and distributed at different heights of the rectifying tower 500, as shown in fig. 8, the number of the spray guns 140 in each row is three in the embodiment and is consistent with the number of air passages 510 in the rectifying tower 500, and one spray gun 140 is arranged in an area above or below each air passage 510;
as shown in fig. 2, the air supply system 200 includes an air pipe 210, a blower 220, a pressure transmitter 230 and an air V-cone flowmeter 240, the blower 220, the pressure transmitter 230 and the air V-cone flowmeter 240 are all connected to the air pipe 210, and the air pipe 210 is connected to the rectifying tower 500;
the flue gas discharge system 300 comprises a flue gas pipeline 310, a flue gas induced draft fan 320 and a thermocouple 330, wherein the flue gas induced draft fan 320 and the thermocouple 330 are both connected with the flue gas pipeline 310, and the flue gas pipeline 310 is communicated to the rectifying tower 500; the air pipeline 210 and the flue gas pipeline 310 are both connected with a heat exchanger 400;
as shown in fig. 3 to 7, the heat exchanger 400 includes an outer cylinder 410, a rotating shaft 420, a partition 430 and a heat accumulator 440, wherein the heat accumulator 440 is made of honeycomb ceramics, and a heat insulation layer 450 is wrapped on the outer surface of the outer cylinder 410; the rotating shaft 420 is installed inside the outer cylinder 410, the partition 430 is installed on the rotating shaft 420, the partition 430 is in a cross shape, the partition 430 divides four gas circulation areas inside the outer cylinder 410, and the four gas circulation areas are respectively called a first flue gas circulation area 411, a second flue gas circulation area 412, a first air circulation area 413 and a second air circulation area 414 along the rotating direction of the rotating shaft 420;
the air pipeline 210 comprises a first air inlet pipe 211, a second air inlet pipe 212, a third air inlet pipe 213, a first air outlet pipe 214 and a second air outlet pipe 215, the first air inlet pipe 211 and the first air outlet pipe 214 are communicated with a first air circulation region 413, the second air inlet pipe 212 and the second air outlet pipe 215 are communicated with a second air circulation region 414, and the third air inlet pipe 213 is communicated with a second smoke circulation region 412;
the flue gas pipeline 310 comprises a first flue gas inlet pipe 311, a second flue gas inlet pipe 312, a first flue gas outlet pipe 313, a second flue gas outlet pipe 314 and a flue gas return pipe 315, the first flue gas inlet pipe 311 and the first flue gas outlet pipe 313 are communicated to the first flue gas circulation area 411, and the second flue gas inlet pipe 312 and the second flue gas outlet pipe 314 are communicated to the second flue gas circulation area 412; the flue gas return pipe 315 is connected with the first flue gas inlet pipe 311 and the second flue gas inlet pipe 312, and a return valve 340 is arranged in the flue gas return pipe 315;
the smoke gas return pipe 315 is also provided with a smoke gas filter 350 and a reverse inflation pipe 360, the smoke gas filter 350 comprises a shell 351 and a filter screen 352 positioned in the shell 351, the reverse inflation pipe 360 is connected with an external air source, and the reverse inflation valve 370 is arranged on the reverse inflation pipe 360; the smoke filter 350 is located between the second smoke inlet pipe 312 and the air return valve 340, and the air return pipe 360 is located between the smoke filter 350 and the air return valve 340.
The heat exchanger 400 in this embodiment is mainly used to realize heat exchange between flue gas from the rectifying tower and combustion air, and the specific heat exchange principle is as follows:
(1) As shown in fig. 4, the heat accumulator 440 is first heated once in the first flue gas flow-through area 411;
(2) The rotating shaft 420 drives the partition plate 430 and the heat accumulator 440 to rotate, the heat accumulator 440 enters the second flue gas flowing area 412 for secondary heating, and dust is inevitably attached to the heat accumulator 440 at the moment;
(3) When the heat accumulator 440 in the second flue gas circulation region 412 is heated to a sufficient temperature, the second flue gas inlet pipe 312 is closed; the third air inlet pipe 213 blows fresh air into the second flue gas circulation area 412, and the fresh air with dust on the heat accumulator 440 sequentially passes through the flue gas return pipe 315, the flue gas filter 350 and the air return valve 340 and enters the first flue gas inlet pipe 311 and the first flue gas circulation area 411;
(4) After the heat accumulator 440 is purged with fresh air, the rotating shaft 420 continues to drive the partition 430 and the heat accumulator 440 to rotate, the heat accumulator 440 enters the first air circulation region 413, and the heat accumulator 440 releases heat and heats air;
(5) The shaft 420 continues to rotate the diaphragm 430 and the thermal mass 440, the thermal mass 440 enters the second air flow region 414, and the thermal mass 440 releases heat and heats the air.
In this embodiment, the hot air in the first air flow region 413 and the hot air in the second air flow region 414 are finally merged and enter the rectifying tower 500 to support combustion.
As shown in fig. 6, during the period of time when the smoke gas returning pipe 315 is not in operation, the gas returning valve 340 is closed, and the gas returning pipe 360 fills gas into the smoke gas returning pipe 315, so that the filter screen 352 is backwashed by the gas flow, the dust on the filter screen 352 is backwashed to the second smoke gas circulation area 412, and most of the backwashed dust is discharged with the smoke gas.
Although the embodiments of the present invention have been described in the specification, these embodiments are merely provided as a hint, and should not limit the scope of the present invention. Various omissions, substitutions, and changes may be made without departing from the spirit of the invention and are intended to be included within the scope of the invention.
Claims (10)
1. The utility model provides a rotatory heat transfer formula heat accumulation combustion system that does not commutate for rectifying column which characterized in that: the device comprises a fuel gas supply system (100), an air supply system (200), a flue gas discharge system (300) and a heat exchanger (400);
the gas supply system (100) comprises a gas pipeline (110), a gas filter (120), a gas pressure reducing valve (130) and spray guns (140), wherein the gas filter (120) and the gas pressure reducing valve (130) are installed in the gas pipeline (110), the spray guns (140) are connected with the gas pipeline (110), the spray guns (140) are arranged in a rectifying tower in a row, and a plurality of spray guns (140) in each row of spray guns (140) are aligned up and down and distributed at different heights of the rectifying tower;
the air supply system (200) comprises an air pipeline (210) and a blower (220), the blower (220) is connected with the air pipeline (210), and the air pipeline (210) is communicated to the rectifying tower; the smoke exhaust system (300) comprises a smoke pipeline (310) and a smoke induced draft fan (320), the smoke induced draft fan (320) is connected with the smoke pipeline (310), and the smoke pipeline (310) is communicated to the rectifying tower; the air pipeline (210) and the flue gas pipeline (310) are both connected with the heat exchanger (400), and the air in the air pipeline (210) and the flue gas in the flue gas pipeline (310) exchange heat in the heat exchanger (400).
2. The rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower as claimed in claim 1, wherein: the heat exchanger (400) comprises an outer barrel (410), a rotating shaft (420), a partition plate (430) and a heat accumulator (440), wherein the rotating shaft (420) is installed inside the outer barrel (410), the partition plate (430) is installed on the rotating shaft (420), the partition plate (430) partitions the inside of the outer barrel (410) into at least two gas circulation areas, the heat accumulator (440) is located on the partition plate (430), and the air pipeline (210) and the flue gas pipeline (310) are respectively communicated with different gas circulation areas.
3. The rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower as claimed in claim 2, characterized in that: the partition plate (430) is in a cross shape, the partition plate (430) divides four gas circulation areas in the outer cylinder (410), and the four gas circulation areas are respectively called a first flue gas circulation area (411), a second flue gas circulation area (412), a first air circulation area (413) and a second air circulation area (414) along the rotation direction of the rotating shaft (420);
the air pipeline (210) comprises a first air inlet pipe (211), a second air inlet pipe (212), a third air inlet pipe (213), a first air outlet pipe (214) and a second air outlet pipe (215), the first air inlet pipe (211) and the first air outlet pipe (214) are communicated with a first air circulation region (413), the second air inlet pipe (212) and the second air outlet pipe (215) are communicated with a second air circulation region (414), and the third air inlet pipe (213) is communicated with a second smoke circulation region (412);
the flue gas pipeline (310) comprises a first flue gas inlet pipe (311), a second flue gas inlet pipe (312), a first flue gas outlet pipe (313), a second flue gas outlet pipe (314) and a flue gas return pipe (315), the first flue gas inlet pipe (311) and the first flue gas outlet pipe (313) are communicated to the first flue gas circulation area (411), and the second flue gas inlet pipe (312) and the second flue gas outlet pipe (314) are communicated to the second flue gas circulation area (412); the flue gas return pipe (315) is connected with the first flue gas inlet pipe (311) and the second flue gas inlet pipe (312), and a return air valve (340) is arranged in the flue gas return pipe (315).
4. The rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower as claimed in claim 3, wherein: and a flue gas filter (350) is also arranged in the flue gas return pipe (315).
5. The rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower as claimed in claim 4, wherein: the smoke filter (350) comprises a housing (351) and a filter screen (352) located in the housing (351).
6. The rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower as claimed in claim 5, wherein: the smoke gas return pipe (315) is also provided with a reverse inflation pipe (360), the reverse inflation pipe (360) is connected with an external gas source, and a reverse inflation valve (370) is arranged on the reverse inflation pipe (360); the smoke filter (350) is located between the second smoke inlet pipe (312) and the air return valve (340), and the reverse inflation pipe (360) is located between the smoke filter (350) and the air return valve (340).
7. The rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower as claimed in claim 6, wherein: the heat accumulator (440) is made of honeycomb ceramics, and the outer surface of the outer cylinder (410) is wrapped with a heat insulation layer (450).
8. The rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower as claimed in claim 1, wherein: the gas supply system (100) further comprises a pressure gauge (150), a gas flowmeter (160), a pressure switch (170) and a gas electric regulating valve (180) which are arranged on the gas pipeline (110).
9. The rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower as claimed in claim 1, wherein: the air supply system (200) further includes a pressure transducer (230) and an air V-cone flow meter (240) mounted on the air line (210).
10. The rotary heat exchange non-reversing heat accumulation combustion system applied to the rectifying tower as claimed in claim 1, wherein: the flue gas discharge system (300) further comprises a thermocouple (330) arranged on the flue gas pipeline (310).
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| CN115234911B (en) | 2024-07-05 |
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