CN108031171B - Waste water waste heat recovery filter equipment - Google Patents
Waste water waste heat recovery filter equipment Download PDFInfo
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- CN108031171B CN108031171B CN201711457555.9A CN201711457555A CN108031171B CN 108031171 B CN108031171 B CN 108031171B CN 201711457555 A CN201711457555 A CN 201711457555A CN 108031171 B CN108031171 B CN 108031171B
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- waste water
- pipe
- filter
- filter screen
- waste
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- 239000002351 wastewater Substances 0.000 title claims abstract description 129
- 238000011084 recovery Methods 0.000 title claims abstract description 34
- 239000002918 waste heat Substances 0.000 title claims abstract description 31
- 238000001914 filtration Methods 0.000 claims abstract description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- 239000012535 impurity Substances 0.000 claims description 18
- 239000002699 waste material Substances 0.000 abstract description 14
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
- C02F2103/023—Water in cooling circuits
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention belongs to the technical field of waste water waste heat recovery, and particularly relates to a waste water waste heat recovery and filtration device which comprises a waste water inlet pipe, a waste water outlet pipe and a waste water filter, wherein the waste water filter comprises a filtering main pipe which is transversely arranged, and an upper filtering net and a lower filtering net which are respectively arranged in the filtering main pipe from top to bottom, the filtering main pipe is respectively communicated with the waste water inlet pipe and the waste water outlet pipe, a gap exists between the upper filtering net and the lower pipe wall of the filtering main pipe, and a gap exists between the lower filtering net and the upper pipe wall. Through the last filter screen that sets up and filter the waste residue in order to the different density in the waste water down with the cooperation of filter screen, through last filter screen and the lower pipe wall of being responsible for of filtration, the clearance that lower filter screen and the last pipe wall of being responsible for of filtration set up, replace the mode that the filter screen covered comprehensively on the cross section of being responsible for of filtration for waste water can pass through fast, effectively prevents to block up, shortens waste water and in filter equipment's stay time, reduces the thermal scattering and disappearing of waste water, is favorable to thermal recovery.
Description
Technical Field
The invention belongs to the technical field of waste water waste heat recovery, and particularly relates to a waste water waste heat recovery and filtration device.
Background
Waste water is often produced in industrial production, and production enterprises can recycle waste heat of the waste water due to the requirements of environmental protection and energy utilization rate improvement.
The heat exchanger can be used in the waste water waste heat recovery process, and various impurities in the waste water are easy to deposit in the pipeline of the heat exchanger and cause the pipeline of the heat exchanger to be blocked, so that the waste water after waste heat recovery is firstly filtered by the filtering device.
The filter element or the filter screen in the conventional filter device carries out totally enclosed filtration to the waste water, greatly reduces the flow velocity of the waste water, prolongs the stay time of the waste water in the filter device, seriously dissipates the heat of the waste water in the filtering process, and has low waste water waste heat recovery speed and efficiency.
Disclosure of Invention
The invention aims to: to the not enough of prior art, submit a waste water waste heat recovery filter equipment to improve waste water waste heat recovery speed and recovery efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a waste water waste heat recovery filter equipment, includes waste water inlet tube, waste water outlet pipe and waste water filter, waste water filter is responsible for including the filtration of violently establishing to and set up from top to bottom respectively filter the last filter screen in the main pipe and filter screen down, filter the main pipe respectively with waste water inlet tube and waste water outlet pipe intercommunication, it has the clearance to go up the filter screen and filter the lower pipe wall of being responsible for, there is the clearance filter screen and the upper pipe wall of filtering the main pipe down.
As an improvement of the waste water waste heat recovery and filtration device, the upper filter screen and the lower filter screen are obliquely arranged towards one end of the main filter pipe connected with the waste water inlet pipe.
As an improvement of the wastewater waste heat recovery and filtration device, the inclination angles of the upper filter screen and the lower filter screen are respectively 30-60 degrees.
As an improvement of the wastewater waste heat recovery and filtration device, at least two upper filter screens and at least two lower filter screens are respectively arranged, and the upper filter screens and the lower filter screens are alternately arranged in the axial direction of the filter main pipe at intervals.
As an improvement of the waste water waste heat recovery and filtration device, the waste water filter further comprises an upper guide plate and a lower guide plate which are respectively arranged in the filtration main pipe from top to bottom, the upper guide plate and the lower guide plate are obliquely arranged, and the oblique directions of the upper guide plate and the lower guide plate are opposite to the oblique directions of the upper filter screen and the lower filter screen.
As an improvement of the wastewater waste heat recovery and filtration device, the inclination angles of the upper guide plate and the lower guide plate are respectively 30-60 degrees.
The waste water waste heat recovery and filtration device is improved in the invention, a water inlet main valve is arranged between the filtration main pipe and the waste water inlet pipe, a water outlet main valve is arranged between the filtration main pipe and the waste water outlet pipe, the waste water filter further comprises an impurity removal circulation pipe, the impurity removal circulation pipe comprises a circulation water inlet end and a circulation water outlet end, the circulation water inlet end and the circulation water outlet end are respectively communicated with the filtration main pipe, the circulation water inlet end is provided with a circulation water inlet valve, the circulation water outlet end is provided with a circulation water outlet valve, and the impurity removal circulation pipe can feed water into the filtration main pipe through the circulation water inlet end and recover water from the circulation water outlet end.
As an improvement of the waste water waste heat recovery and filtration device, the impurity removal circulating pipe further comprises a water pump, a filter element and a pressure sensor.
As an improvement of the waste water waste heat recovery and filtration device, the waste water filter further comprises a high-pressure water inlet pipe, the high-pressure water inlet pipe is communicated with the impurity removal circulation pipe, and the high-pressure water inlet pipe is provided with a high-pressure valve.
As an improvement of the waste water waste heat recovery and filtration device, at least two waste water filters are arranged, and the main filtration pipe of each waste water filter is respectively communicated with the waste water inlet pipe and the waste water outlet pipe.
The invention has the beneficial effects that: the utility model provides a waste water waste heat recovery filter equipment, including waste water inlet tube, waste water outlet pipe and waste water filter, waste water filter is responsible for including the filtration of violently establishing to and set up from top to bottom respectively last filter screen and lower filter screen in the filtration main pipe, filter the main pipe respectively with waste water inlet tube and waste water outlet pipe intercommunication, it has the clearance to go up the filter screen and filter the lower pipe wall of being responsible for, there is the clearance filter screen and the upper pipe wall of filtering the main pipe down. Through the last filter screen that sets up and filter the waste residue in order to the different density in the waste water down with the cooperation of filter screen, through last filter screen and the lower pipe wall of being responsible for of filtration, the clearance that lower filter screen and the last pipe wall of being responsible for of filtration set up, replace the mode that the filter screen covered comprehensively on the cross section of being responsible for of filtration for waste water can pass through fast, effectively prevents to block up, shortens waste water and in filter equipment's stay time, reduces the thermal scattering and disappearing of waste water, is favorable to thermal recovery.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of fig. 1.
The system comprises a waste water inlet pipe 1, a waste water outlet pipe 2, a filtering main pipe 31, a lower pipe wall 311, an upper pipe wall 312, an upper filtering net 32, an upper filtering net 33, a lower filtering net 34, an upper guiding plate 35, a lower guiding plate 36, an impurity removing circulating pipe 361, a circulating water inlet end 362, a circulating water outlet end 363, a circulating water inlet valve 364, a circulating water outlet valve 365, a water pump 366, a filtering core 367, a pressure sensor 37, a high-pressure water inlet pipe 371, a high-pressure valve 38, a water inlet main valve 39 and a water outlet main valve.
Detailed Description
The present invention and its advantageous effects will be described in further detail with reference to specific embodiments, but the present invention is not limited thereto.
As shown in fig. 1 and 2, a waste water waste heat recovery filter equipment, including waste water inlet tube 1, waste water outlet pipe 2 and waste water filter, waste water filter is responsible for 31 including the filtration of violently establishing to and set up about respectively filter and be responsible for the last filter screen 32 in 31 and filter screen 33 down, filter be responsible for 31 respectively with waste water inlet tube 1 and waste water outlet pipe 2 intercommunication, it has the clearance to go up filter screen 32 and filter the lower tube wall 311 who is responsible for 31, there is the clearance lower filter screen 33 and the upper tube wall 312 who filters to be responsible for 31. Through the last filter screen 32 that sets up and the cooperation of lower filter screen 33 in order to filter the waste residue of the different density in the waste water, through last filter screen 32 with filter the lower pipe wall 311 of being responsible for 31, the clearance that lower filter screen 33 and the last pipe wall 312 of filtering and being responsible for 31 set up, replace the filter screen the mode that covers comprehensively on the cross section of filtering and being responsible for 31, make waste water can pass through fast, effectively prevent to block up, shorten waste water stay time at filter equipment, reduce the thermal scattering and disappearing of waste water, be favorable to thermal recovery.
Preferably, the upper filter 32 and the lower filter 33 are disposed to be inclined toward one end of the main filter pipe 31 connected to the wastewater inlet pipe 1. Go up filter screen 32 with filter screen 33 sets up to the one end slope of intaking of waste water down, increases filter screen surface area on the one hand to improve filtration efficiency, the last filter screen 32 that on the other hand slope set up and filter screen 33 down respectively with filter and be responsible for 31 pipe wall shape storage space, the rivers direction of cooperation waste water, in order to accomodate the waste residue of filtering, prevent that the waste residue from flowing away along with waste water once more.
Preferably, the inclination angles (the included angles with the axial direction of the main filter pipe 31) of the upper filter screen 32 and the lower filter screen 33 are respectively 30-60 degrees. The inclination angle between the upper filter screen 32 and the lower filter screen 33 is too small, so that the storage effect of the waste residue is weakened, the waste residue is easy to flow away along with the waste water, and the filtering effect cannot be achieved. The inclination angle of the upper filter screen 32 and the lower filter screen 33 is too large, the direction of the filter mesh is inconsistent with the water flow direction, and the blocking effect on the water flow is larger; therefore, in application, the inclination angles of the upper filter screen 32 and the lower filter screen 33 are set to be 30-60 degrees, and the filtering effect is optimal, preferably, the inclination angle of the upper filter screen 32 and the inclination angle of the lower filter screen 33 are 45 degrees respectively.
Preferably, at least two upper filter screens 32 and at least two lower filter screens 33 are respectively arranged, and the upper filter screens 32 and the lower filter screens 33 are alternately arranged at intervals in the axial direction of the filter main pipe 31. Since the upper filter screen 32 and the lower filter screen 33 are respectively provided with gaps with the lower pipe wall 311 and the upper pipe wall 312 of the filter main pipe 31, the plurality of upper filter screens 32 and lower filter screens 33 are alternately arranged at intervals to contribute to the improvement of the filtering effect.
Preferably, the wastewater filter further comprises an upper guide plate 34 and a lower guide plate 35 which are respectively arranged in the main filtering pipe 31 up and down, the upper guide plate 34 and the lower guide plate 35 are arranged in an inclined manner, and the inclined directions of the upper guide plate 34 and the lower guide plate 35 are opposite to the inclined directions of the upper filtering net 32 and the lower filtering net 33. Go up guide plate 34 with guide plate 35 plays the effect of water conservancy diversion to the waste water that gets into the filter main pipe 31 down, go up guide plate 34 with waste water conservancy diversion to lower filter screen 33 to make waste water concentrate through lower filter screen 33, on the same principle, guide plate 35 is supreme filter screen 32 with waste water conservancy diversion down, concentrates through last filter screen 32 with waste water, so that waste water all obtains filtration, improves the filter effect.
Preferably, the inclination angle (with filter the main pipe 31 axial contained angle) of going up guide plate 34 with guide plate 35 down is 30 ~ 60 degrees respectively, go up guide plate 34 with guide plate 35's inclination direction is opposite with the inclination of last filter screen 32 and lower filter screen 33 down, and the angle size is the same to the flow direction that makes the waste water that is responsible for being guided in 31 in the filter is the same with the flow direction of last filter screen 32 and lower filter screen 33, has both improved the filter effect, has also guaranteed the velocity of flow of waste water, improves filtration efficiency, preferably go up guide plate 34's inclination with guide plate 35's inclination is 45 degrees respectively.
Preferably, an inlet main valve 38 is disposed between the main filtering pipe 31 and the wastewater inlet pipe 1, an outlet main valve 39 is disposed between the main filtering pipe 31 and the wastewater outlet pipe 2, the wastewater filter further includes an impurity removing circulation pipe 36, the impurity removing circulation pipe 36 includes a circulation inlet end 361 and a circulation outlet end 362, the circulation inlet end 361 and the circulation outlet end 362 are respectively communicated with the main filtering pipe 31, the circulation inlet end 361 is provided with a circulation inlet valve 363, the circulation outlet end 362 is provided with a circulation outlet valve 364, and the impurity removing circulation pipe 36 can feed water into the main filtering pipe 31 through the circulation inlet end 361 and recover water from the circulation outlet end 362. Work as when the last filter screen 32 in the main 31 of filtration and lower filter screen 33 collect a quantitative waste residue, need clear up the waste residue, turn off during the clearance waste residue intake main valve 38 with go out water main valve 39, and open circulation water intaking valve 363 with circulation outlet valve 364, through edulcoration circulating pipe 36 to 31 circulation of filter main pipe is intake, it is right to go up filter screen 32 and lower filter screen 33 and wash, when the circulation was intake simultaneously go up guide plate 34 with guide plate 35 plays the barrier effect to the circulating water down, makes the circulating water take place the torrent, and the circulating water of torrent is constantly flushing the wire side of last filter screen 32 and lower filter screen 33 to can wash the waste residue fast, improve cleaning quality and efficiency.
Preferably, the impurity removing circulation pipe 36 further comprises a water pump 365, a filter core 366 and a pressure sensor 367, the water pump 365 supplies power for circulating inlet water, the filter core 366 collects removed waste residues in the impurity removing process of circulating water, and the pressure sensor 367 detects pressure increase in the impurity removing circulation pipe 36 after certain waste residues are collected, and timely cleaning or replacing the filter core 366 is reminded.
As preferred, waste water filter still includes high pressure inlet tube 37, high pressure inlet tube 37 with edulcoration circulating pipe 36 communicates, high pressure inlet tube 37 is provided with high-pressure valve 371, can let in the high pressure water to edulcoration circulating pipe 36 under emergency to carry out quick edulcoration to last filter screen 32 and lower filter screen 33, and can clear up stubborn waste residue that adheres to in last filter screen 32 and lower filter screen 33, guarantee going on smoothly of enterprise's production.
Preferably, at least two wastewater filters are provided, and the main filtering pipe 31 of each wastewater filter is respectively communicated with the wastewater inlet pipe 1 and the wastewater outlet pipe 2. By respectively switching on and off the water inlet main valve 38, the water outlet main valve 39, the circulating water inlet valve 363 and the circulating water outlet valve 364 for filtering the wastewater, when the upper filter screen 32 and the lower filter screen 33 of the wastewater filter can be subjected to impurity removal, the other wastewater filters can still continue to work, so that the wastewater filtering is continuously carried out, and the continuous and stable operation of enterprise production is ensured.
Variations and modifications to the above-described embodiments may also occur to those skilled in the art, which fall within the scope of the invention as disclosed and taught herein. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious improvement, replacement or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.
Claims (7)
1. The utility model provides a waste water waste heat recovery filter equipment which characterized in that: the waste water filter comprises a waste water inlet pipe, a waste water outlet pipe and a waste water filter, wherein the waste water filter comprises a filtering main pipe arranged transversely, and an upper filtering net and a lower filtering net which are respectively arranged in the filtering main pipe from top to bottom;
the wastewater filter also comprises an upper guide plate and a lower guide plate which are respectively arranged in the filtering main pipe up and down, the upper guide plate and the lower guide plate are obliquely arranged, and the oblique directions of the upper guide plate and the lower guide plate are opposite to the oblique directions of the upper filter screen and the lower filter screen;
the inclination angles of the upper guide plate and the lower guide plate are respectively 30-60 degrees;
the waste water filter comprises a filtering main pipe, a waste water inlet pipe, a waste water outlet pipe, a circulating water inlet valve, a circulating water outlet valve and a waste water outlet main valve, wherein the filtering main pipe is provided with a water inlet main valve, the filtering main pipe is provided with a water outlet main valve, the water outlet main valve is arranged between the filtering main pipe and the waste water outlet pipe, the waste water filter further comprises an impurity removing circulating pipe, the impurity removing circulating pipe comprises a circulating water inlet end and a circulating water outlet end, the circulating water inlet end is provided with the circulating water outlet valve, and the impurity.
2. The waste water waste heat recovery and filtration device of claim 1, wherein: the upper filter screen and the lower filter screen are obliquely arranged towards the direction of one end of the filter main pipe connected with the wastewater inlet pipe.
3. The waste water waste heat recovery and filtration device of claim 2, wherein: the inclination angles of the upper filter screen and the lower filter screen are respectively 30-60 degrees.
4. The waste water waste heat recovery and filtration device according to any one of claims 1 to 3, wherein: the upper filter screen and the lower filter screen are respectively provided with at least two, and the upper filter screen and the lower filter screen are alternately arranged in the axial direction of the filter main pipe at intervals.
5. The waste water waste heat recovery and filtration device of claim 4, wherein: the impurity removal circulating pipe also comprises a water pump, a filter element and a pressure sensor.
6. The waste water waste heat recovery and filtration device of claim 5, wherein: the waste water filter still includes the high pressure inlet tube, the high pressure inlet tube with the edulcoration circulating pipe intercommunication, the high pressure inlet tube is provided with the high-pressure valve.
7. The waste water waste heat recovery and filtration device of claim 5, wherein: the waste water filter is provided with two at least, and each waste water filter's filtration is responsible for and is respectively with waste water inlet tube and waste water outlet pipe intercommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711457555.9A CN108031171B (en) | 2017-12-28 | 2017-12-28 | Waste water waste heat recovery filter equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711457555.9A CN108031171B (en) | 2017-12-28 | 2017-12-28 | Waste water waste heat recovery filter equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108031171A CN108031171A (en) | 2018-05-15 |
| CN108031171B true CN108031171B (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711457555.9A Active CN108031171B (en) | 2017-12-28 | 2017-12-28 | Waste water waste heat recovery filter equipment |
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| Country | Link |
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| CN (1) | CN108031171B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202342988U (en) * | 2011-12-01 | 2012-07-25 | 山东鲁能泰山铁塔有限公司 | Pipeline sewage filtering device |
| CN102961917A (en) * | 2012-11-19 | 2013-03-13 | 大连民族学院 | Pipeline filter pipe |
| CN203790689U (en) * | 2014-04-14 | 2014-08-27 | 辽宁科技大学 | Online net replacement filter of steel rolling cooling water circulating system |
| CN204411830U (en) * | 2014-10-20 | 2015-06-24 | 葛兴明 | Petrochemical industry conveyance conduit filter |
| CN206157695U (en) * | 2016-11-03 | 2017-05-10 | 颜建 | Prevent jam type water conservancy pipeline |
| CN206715540U (en) * | 2017-04-04 | 2017-12-08 | 安徽海盾建材有限公司 | Dedusting blast pipe is used in a kind of fire resisting new material production |
-
2017
- 2017-12-28 CN CN201711457555.9A patent/CN108031171B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202342988U (en) * | 2011-12-01 | 2012-07-25 | 山东鲁能泰山铁塔有限公司 | Pipeline sewage filtering device |
| CN102961917A (en) * | 2012-11-19 | 2013-03-13 | 大连民族学院 | Pipeline filter pipe |
| CN203790689U (en) * | 2014-04-14 | 2014-08-27 | 辽宁科技大学 | Online net replacement filter of steel rolling cooling water circulating system |
| CN204411830U (en) * | 2014-10-20 | 2015-06-24 | 葛兴明 | Petrochemical industry conveyance conduit filter |
| CN206157695U (en) * | 2016-11-03 | 2017-05-10 | 颜建 | Prevent jam type water conservancy pipeline |
| CN206715540U (en) * | 2017-04-04 | 2017-12-08 | 安徽海盾建材有限公司 | Dedusting blast pipe is used in a kind of fire resisting new material production |
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| Publication number | Publication date |
|---|---|
| CN108031171A (en) | 2018-05-15 |
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