CN214020045U - Smoke and dust purifier of ultra-clean emission coal-fired heat supply unit - Google Patents
Smoke and dust purifier of ultra-clean emission coal-fired heat supply unit Download PDFInfo
- Publication number
- CN214020045U CN214020045U CN202022313726.4U CN202022313726U CN214020045U CN 214020045 U CN214020045 U CN 214020045U CN 202022313726 U CN202022313726 U CN 202022313726U CN 214020045 U CN214020045 U CN 214020045U
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- Prior art keywords
- smoke
- reaction tank
- heat supply
- supply unit
- ultra
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- 239000000779 smoke Substances 0.000 title claims abstract description 80
- 239000000428 dust Substances 0.000 title claims abstract description 43
- 239000003513 alkali Substances 0.000 claims abstract description 57
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- 239000004744 fabric Substances 0.000 claims abstract description 29
- 238000000746 purification Methods 0.000 claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 230000008021 deposition Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 241000208125 Nicotiana Species 0.000 abstract description 8
- 235000002637 Nicotiana tabacum Nutrition 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 8
- 238000001179 sorption measurement Methods 0.000 abstract description 6
- 238000010030 laminating Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 238000012856 packing Methods 0.000 abstract description 4
- 230000002085 persistent effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 25
- 239000007788 liquid Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 13
- 238000001914 filtration Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000005484 gravity Effects 0.000 description 4
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- 239000000292 calcium oxide Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 239000002365 multiple layer Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a smoke and dust purifier of coal-fired heat supply unit of ultra-clean emission, including purifying organism and alkali lye reaction tank, it is provided with into the tobacco pipe to purify organism left side lower extreme, and advances the inside left end of tobacco pipe and be connected with the filter element, it is connected with the restriction cover to advance the tobacco pipe outside, alkali lye reaction tank sets up in purifying the inside lower extreme of organism, and is provided with the pivot in the middle part of the alkali lye reaction tank. This coal-fired heat supply unit's of ultra-clean emission smoke and dust purifier is provided with takes out the board, the hollow filter cloth that has a structure size identical of taking out the laminating of board middle part, the inside packing of this filter cloth has certain alkali lye to be adsorbed by the fibrous layer of filter cloth, the inside rear end of filter cloth still is equipped with one deck active carbon, when mixed smoke and dust gas is through, the sulfur dioxide gas who contains is absorbed by alkali lye, the peculiar smell of persisting in the active carbon adsorption smoke and dust simultaneously, in order to further improve the purification degree, can outwards slide with exhaust port sliding connection's the board of taking out and take out, be convenient for take out and change the clearance from the filter cloth.
Description
Technical Field
The utility model relates to a coal-fired heat supply unit technical field specifically is a smoke and dust purifier of coal-fired heat supply unit of ultra-clean emission.
Background
The coal-fired heat supply unit mainly comprises a combustion system (taking a boiler as a core), a steam-water system (mainly comprising various pumps, a feed water heater, a condenser, a pipeline, a water-cooled wall and the like), a control system and the like, wherein the combustion system and the steam-water system can generate high-temperature and high-pressure steam, contain huge heat, and generate a large amount of smoke and dust gases such as sulfur dioxide and the like to pollute and harm air and human bodies during coal-fired heat supply, and a purification device is required to purify the smoke and dust gases.
When a coal-fired heat supply unit in the market works, the purification and emission degree of acid smoke and dust gas is not enough, calcium oxide is added in the coal-fired heat supply process to react to remove sulfur dioxide, and the sulfur removal efficiency is poor.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a smoke and dust purifier of coal-fired heat supply unit is discharged to the smoke and dust purifier on the market that proposes in solving above-mentioned background is not enough to the purification emission degree in acid smoke and dust gas, adds the calcium oxide at coal-fired heat supply in-process usually and reacts sulfur dioxide that removes, removes the not good problem of sulfur efficiency.
In order to achieve the above object, the utility model provides a following technical scheme: a smoke dust purification device of an ultra-clean emission coal-fired heat supply unit comprises a purification body and an alkali liquor reaction tank, wherein a smoke inlet pipe is arranged at the lower end of the left side of the purification body, a filter disc is connected at the left end inside the smoke inlet pipe, a limiting sleeve is connected at the outer side of the smoke inlet pipe, the alkali liquor reaction tank is arranged at the lower end inside the purification body, a rotating shaft is arranged in the middle of the alkali liquor reaction tank, a stirrer is connected at the top end of the rotating shaft, a driving motor is arranged at the outer side of the rotating shaft, a deposition chamber is arranged at the lower end of the alkali liquor reaction tank, a drain outlet is arranged at the bottom end of the deposition chamber, a connecting water pipe is connected at the right end of the alkali liquor reaction tank, a circulating pump is arranged at the right end of the connecting water pipe, a sprayer is distributed at the upper end inside the purification body, a demisting plate is connected at the upper end of the top of the purification body, an exhaust outlet is arranged in the middle of the purification body, and a pumping plate is movably connected, and the inner wall of the drawing plate is connected with filter cloth.
Preferably, advance tobacco pipe inner wall and connect the face and laminate each other with filter element outer wall connection face, and advance and be the buckle connection between tobacco pipe and the restriction cover.
Preferably, the stirrer forms a transmission structure through a rotating shaft and a driving motor, and the stirrer is in a spiral shape.
Preferably, the connecting water pipes are symmetrically distributed about the vertical central axis of the purifier body, and the alkali liquor reaction tank is communicated with the sprayer through the connecting water pipes.
Preferably, the defogging plates are in a wave shape and are distributed at equal intervals at the upper end inside the purifying body.
Preferably, the drawing plate is in sliding connection with the smoke outlet and is hollow.
Compared with the prior art, the beneficial effects of the utility model are that: the filter disc mutually attached to the connecting surface of the smoke inlet pipe can block large granular substances generated in the smoke conveying process, prevents the large granular substances from entering the interior of the purifier body to cause abrasion and blockage, plays a certain protection role, is fastened and reinforced through the limiting sleeve correspondingly, prevents the filter disc from being separated from the purifier body under stress, and can be manually separated from the limiting sleeve, so that the limiting sleeve is detached, the filter disc is convenient to take out for cleaning, and the filter disc body is prevented from being blocked due to long-term filtering to influence the smoke dust transmission effect;
the rotating shaft moves along with the operation of the driving motor, and then the stirrer is driven to stir, so that alkali liquor in the alkali liquor reaction tank is influenced and stirred, the entered smoke dust and gas are in full contact reaction with the alkali liquor, sulfur dioxide gas in the alkali liquor reaction tank is eliminated, and meanwhile, the alkali liquor can be uniformly mixed by the rotating stirrer;
hollow take out the laminating of board middle part and have a identical filter cloth of structure size, this filter cloth inside packing has certain alkali lye to be adsorbed by the fibrous layer of filter cloth, the inside rear end of filter cloth still is equipped with the one deck active carbon, when mixed smoke and dust gas passes through, carry out the multiple layer filtration via the filter cloth when discharging the smoke and dust, sulfur dioxide gas who contains is absorbed by alkali lye, the peculiar smell that persists in the active carbon adsorption smoke and dust simultaneously, in order to further improve the purification degree, take out the board with exhaust port sliding connection's extraction and can outwards slide and take out, be convenient for take out and change the clearance from the filter cloth.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the inner structure of the smoke inlet pipe of the present invention;
fig. 3 is a schematic view of the connection structure of the pulling plate and the filter cloth of the present invention.
In the figure: 1. purifying the organism; 2. a smoke inlet pipe; 3. a filter disc; 4. a restraining sleeve; 5. an alkali liquor reaction tank; 6. A stirrer; 7. a rotating shaft; 8. a drive motor; 9. a deposition chamber; 10. a sewage draining outlet; 11. connecting a water pipe; 12. a circulation pump; 13. a sprayer; 14. a defogging plate; 15. a smoke outlet; 16. drawing the plate; 17. and (5) filtering the cloth.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a smoke and dust purifier of an ultra-clean emission coal-fired heat supply unit comprises a purifier body 1, a smoke inlet pipe 2, a filter disc 3, a limiting sleeve 4, an alkali liquor reaction tank 5, a stirrer 6, a rotating shaft 7, a driving motor 8, a deposition chamber 9, a drain outlet 10, a connecting water pipe 11, a circulating pump 12, a sprayer 13, a demisting plate 14, a smoke outlet 15, a pumping plate 16 and filter cloth 17, wherein the smoke inlet pipe 2 is arranged at the lower end of the left side of the purifier body 1, the filter disc 3 is connected with the left end inside the smoke inlet pipe 2, the inner wall connecting surface of the smoke inlet pipe 2 is mutually attached to the outer wall connecting surface of the filter disc 3, the smoke inlet pipe 2 is connected with the limiting sleeve 4 in a buckling manner, the filter disc 3 mutually attached to the connecting surface of the smoke inlet pipe 2 can block large granular substances generated in a smoke conveying process, the smoke and can be prevented from entering the purifier body 1 to cause abrasion and blockage, a certain protection effect is achieved, and the corresponding filter disc 3 is buckled and reinforced through the limiting sleeve 4, the filter disc 3 is prevented from being separated under stress, meanwhile, the smoke inlet pipe 2 connected with the buckle and the limiting sleeve 4 can be manually separated, the limiting sleeve 4 is removed, the filter disc 3 is convenient to take out and clean, and the filter disc 3 body is prevented from being blocked due to long-term filtering, so that the smoke transmission effect is influenced;
the outer side of the smoke inlet pipe 2 is connected with a limiting sleeve 4, the alkali liquor reaction tank 5 is arranged at the lower end in the purifier body 1, a rotating shaft 7 is arranged in the middle of the alkali liquor reaction tank 5, the top end of the rotating shaft 7 is connected with a stirrer 6, a driving motor 8 is arranged on the outer side of the rotating shaft 7, the stirrer 6 and the driving motor 8 form a transmission structure through the rotating shaft 7, the stirrer 6 is spiral, the rotating shaft 7 moves along with the operation of the driving motor 8, and then the transmission stirrer 6 is used for stirring, so that the alkali liquor in the alkali liquor reaction tank 5 is influenced and stirred, the entered smoke dust and gas are in full contact reaction with the alkali liquor, sulfur dioxide gas existing in the smoke inlet pipe is eliminated, and meanwhile, the rotating stirrer 6 can also uniformly mix the alkali liquor;
the lower end of the alkali liquor reaction tank 5 is provided with a deposition chamber 9, the bottom end of the deposition chamber 9 is provided with a drain outlet 10, the right end of the alkali liquor reaction tank 5 is connected with a connecting water pipe 11, the right end of the connecting water pipe 11 is provided with a circulating pump 12, the connecting water pipe 11 is symmetrically distributed about the vertical central axis of the purifier body 1, the alkali liquor reaction tank 5 forms a communicated structure with a sprayer 13 through the connecting water pipe 11, the symmetrically distributed connecting water pipe 11 can improve the amount of conveying liquid and improve the conveying efficiency, the connecting water pipe 11 conveys the alkali liquor in the alkali liquor reaction tank 5 into the sprayer 13 through the action of the circulating pump 12, the alkali liquor is sprayed out by the sprayer 13 and falls back into the alkali liquor reaction tank 5 again, the alkali liquor is recycled, no waste is caused, the contact area of the alkali liquor and the smoke dust is further increased correspondingly through the spraying of the sprayer 13, and the purification degree is improved;
the upper end of the connecting water pipe 11 is distributed with a sprayer 13, the upper end inside the purifying body 1 is connected with a demisting plate 14, the middle part of the top end of the purifying body 1 is provided with a smoke outlet 15, the demisting plate 14 is in a wave shape, the demisting plate 14 is distributed at equal intervals at the upper end inside the purifying body 1, when smoke and dust gas flows through the demisting plate 14, due to the inertia impact effect of gas, smoke and dust carrying liquid collide with the demisting plate 14 and are attached to the surface of the demisting plate 14, the liquid containing liquid smoke and dust is converged into large-particle liquid drops under the gravity settling effect and moves forwards along with the gas flow to the bottom end of the demisting plate 14 distributed at equal intervals, the liquid drops are larger and larger due to the friction effect, the adsorption effect and the surface tension of the demisting plate 14, and when the gravity generated by the converged liquid drops exceeds the resultant force of the rising force of the gas and the liquid surface tension, the liquid drops are separated from the surface of the demisting plate 14, the multi-fold structure of the wave-shaped defogging plate 14 increases the opportunity of capturing the liquid, and the smoke dust of the liquid which is not removed is captured at the next turn under the same action, so that the repeated action can greatly improve the defogging efficiency;
The working principle is as follows: to this kind of soot purification device of ultra-clean emission coal-fired heat supply unit at first this coal-fired heat supply unit can emit a large amount of sulfur dioxide when energy supply is burnt, can absorb a large amount of sulfur dioxide after throwing into calcium oxide and solidify the desulfurization, let into inside clearing body 1 through advancing tobacco pipe 2 primary desulfurized soot gas afterwards, and advance the inner wall of tobacco pipe 2 and be provided with the filter disc 3 of connecting face mutual laminating, the large granule material that can the separation flue gas transportation process produced, prevent to get into and lead to wearing and tearing and dredging block up inside clearing body 1, play certain guard action, corresponding filter disc 3 carries out buckle reinforcement through restriction cover 4, prevent that filter disc 3 atress breaks away from, the tobacco pipe 2 that advances that the buckle is connected simultaneously can manual separation with restriction cover 4, realize dismantling restriction cover 4, be convenient for take out filter disc 3 and clear up, prevent that long-term filtration leads to the jam of filter disc 3 body, the effect of smoke dust transmission is influenced, smoke dust enters the purifying machine body 1 and then reacts with the alkali liquor reaction tank 5, the stirrer 6 is arranged in the alkali liquor reaction tank 5, the rotating shaft 7 moves along under the work of the driving motor 8, and then the stirrer 6 is driven to stir, so that alkali liquor in the alkali liquor reaction tank 5 is influenced and stirred, the entered smoke dust and gas fully contact with the alkali liquor to react, sulfur dioxide gas in the alkali liquor is eliminated, meanwhile, the rotating stirrer 6 can uniformly mix the alkali liquor, the smoke dust gas after secondary purification is upwards moved under the influence of a micro blower and benefits arranged in the smoke exhaust port 15, the alkali liquor in the alkali liquor reaction tank 5 is conveyed into the sprayer 13 under the action of the circulating pump 12, then is sprayed out by the sprayer 13 and falls back into the alkali liquor reaction tank 5 again, so that the alkali liquor is recycled and cannot be wasted, correspondingly, the contact area of the alkali liquor and the smoke dust is further increased through the spraying of the sprayer 13, the purification degree is improved, then the smoke dust continuously floats upwards to contact the demisting plate 14, due to the inertia impact effect of the gas, the smoke dust carrying the liquid collides with the demisting plate 14 and is attached to the surface of the demisting plate 14, the liquid-containing smoke dust is subjected to the gravity settling effect to enable the liquid to be gathered into large-particle liquid drops and move forwards along with the gas flow to the bottom end of the demisting plate 14 in equal distance distribution, the liquid drops are larger and larger due to the friction effect and the adsorption effect of the demisting plate 14 and the surface tension of the liquid, the liquid drops are separated from the surface of the demisting plate 14 until the gathered liquid drops are larger, the gravity generated by the liquid drops exceeds the resultant force of the rising force of the gas and the surface tension of the liquid, the multi-fold structure of the wave-shaped demisting plate 14 increases the chance of liquid to be captured, the smoke dust of the liquid which is not removed at the next turning place through the same effect and is captured, like this repeatedly action, can improve defogging efficiency greatly, discharge from exhaust port 15 at last, hollow take out 16 middle parts of board laminating of board has a identical filter cloth 17 of structure size, this filter cloth 17 internal packing has certain alkali lye to be adsorbed by the fibrous layer of filter cloth 17, the inside rear end of filter cloth 17 still is equipped with one deck active carbon, when mixed smoke and dust gas passes through, carry out the multiple-layer filtration through filter cloth 17 when discharge smoke and dust, sulfur dioxide gas that contains is absorbed by alkali lye, the peculiar smell that persists in the active carbon adsorption smoke and dust simultaneously, with further improvement purification degree, take out board 16 with exhaust port 15 sliding connection can outwards slide and take out the filter cloth, be convenient for take out and take out 17 to change the clearance, just so accomplish the smoke and dust purifier's of whole ultra-clean emission coal-fired heat supply unit use process.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a smoke and dust purifier of coal-fired heat supply unit of ultra-clean emission, includes purifying organism (1) and alkali lye reaction tank (5), its characterized in that: the purification device is characterized in that a smoke inlet pipe (2) is arranged at the lower end of the left side of the purification device body (1), a filter disc (3) is connected at the left end of the interior of the smoke inlet pipe (2), a limiting sleeve (4) is connected to the outer side of the smoke inlet pipe (2), an alkali liquor reaction tank (5) is arranged at the lower end of the interior of the purification device body (1), a rotating shaft (7) is arranged in the middle of the alkali liquor reaction tank (5), an agitator (6) is connected to the top end of the rotating shaft (7), a driving motor (8) is arranged on the outer side of the rotating shaft (7), a deposition chamber (9) is arranged at the lower end of the alkali liquor reaction tank (5), a sewage discharge outlet (10) is arranged at the bottom end of the deposition chamber (9), a connecting water pipe (11) is connected to the right end of the alkali liquor reaction tank (5), a circulating pump (12) is arranged at the right end of the connecting water pipe (11), a sprayer (13) is distributed at the upper end of the purification device body (1), a demisting plate (14) is connected to the upper end of the interior of the purification device body (1), and a smoke outlet (15) is arranged in the middle of the top end of the purifier body (1), a drawing plate (16) is movably connected in the middle of the smoke outlet (15), and filter cloth (17) is connected to the inner wall of the drawing plate (16).
2. The smoke purifying device of the ultra-clean emission coal-fired heat supply unit according to claim 1, characterized in that: the inner wall connecting surface of the smoke inlet pipe (2) is attached to the outer wall connecting surface of the filter disc (3), and the smoke inlet pipe (2) is connected with the limiting sleeve (4) in a buckling manner.
3. The smoke purifying device of the ultra-clean emission coal-fired heat supply unit according to claim 1, characterized in that: the stirrer (6) and the driving motor (8) form a transmission structure through the rotating shaft (7), and the stirrer (6) is spiral.
4. The smoke purifying device of the ultra-clean emission coal-fired heat supply unit according to claim 1, characterized in that: the connecting water pipes (11) are symmetrically distributed about the vertical central axis of the purifier body (1), and the alkali liquor reaction tank (5) forms a communicated structure with the sprayer (13) through the connecting water pipes (11).
5. The smoke purifying device of the ultra-clean emission coal-fired heat supply unit according to claim 1, characterized in that: the demisting plates (14) are in a wave shape, and the demisting plates (14) are distributed at equal intervals at the upper end inside the purifier body (1).
6. The smoke purifying device of the ultra-clean emission coal-fired heat supply unit according to claim 1, characterized in that: the drawing plate (16) is in sliding connection with the smoke outlet (15), and the drawing plate (16) is hollow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022313726.4U CN214020045U (en) | 2020-10-17 | 2020-10-17 | Smoke and dust purifier of ultra-clean emission coal-fired heat supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022313726.4U CN214020045U (en) | 2020-10-17 | 2020-10-17 | Smoke and dust purifier of ultra-clean emission coal-fired heat supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214020045U true CN214020045U (en) | 2021-08-24 |
Family
ID=77353081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022313726.4U Withdrawn - After Issue CN214020045U (en) | 2020-10-17 | 2020-10-17 | Smoke and dust purifier of ultra-clean emission coal-fired heat supply unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214020045U (en) |
-
2020
- 2020-10-17 CN CN202022313726.4U patent/CN214020045U/en not_active Withdrawn - After Issue
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