CN110053887A - A kind of cement plant powder denitrfying agent conveying device and its application method - Google Patents
A kind of cement plant powder denitrfying agent conveying device and its application method Download PDFInfo
- Publication number
- CN110053887A CN110053887A CN201910374275.4A CN201910374275A CN110053887A CN 110053887 A CN110053887 A CN 110053887A CN 201910374275 A CN201910374275 A CN 201910374275A CN 110053887 A CN110053887 A CN 110053887A
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- Prior art keywords
- conveying device
- feed bin
- cement plant
- pneumatic
- plant powder
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- 239000000843 powder Substances 0.000 title claims abstract description 41
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 34
- 239000004568 cement Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 20
- 238000005303 weighing Methods 0.000 claims abstract description 18
- 230000004913 activation Effects 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 16
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 9
- 239000000908 ammonium hydroxide Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/66—Large containers characterised by means facilitating filling or emptying preventing bridge formation using vibrating or knocking devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/60—Devices for separating the materials from propellant gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/005—Control arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
- B65G65/46—Devices for emptying otherwise than from the top using screw conveyors
Abstract
The invention discloses a kind of cement plant powder denitrfying agent conveying device and its application methods, the conveying device includes feed bin, activate hopper, pneumatic gate valve, measure batcher, weighing screw conveyor, gas-solid separator, feed appliance, roots blower and discharge nozzle, institute's feed bin is connected to activation hopper, activate hopper connection metering batcher, pneumatic gate valve is provided between the activation hopper and metering batcher, the metering batcher connection weighing screw conveyor, the weighing screw conveyor is connected to gas-solid separator, the gas-solid separator is connected to feed appliance, the feed appliance is connected to discharge nozzle, the connection roots blower and dore furnace of the discharge nozzle, side wall in feed bin is provided with pneumatic arch breaking device and vibrator.Top, the lower part of feed bin middle cylindrical section of the present invention, the top of conical section are provided with pneumatic arch breaking device, while introducing pneumatic hammer broken arch, ensure that the smooth of pulvis blanking, solve pulvis and put up a bridge or hardened cause this unsmooth root problem of blanking.
Description
Technical field
The invention belongs to powder denitration technology fields, and in particular to a kind of cement plant powder denitrfying agent conveying device.In addition,
The invention further relates to the application methods of the cement plant powder denitrfying agent conveying device.
Background technique
Nitrogen denitration is dropped to new type dry kiln, newly, changes, extend manufacture of cement line generalization denitration efficiency not less than 60%；In atmosphere
Prevention and cure of pollution key area is implemented stringenter special discharge to cement industry and is limited." cement industry Air Pollutant Emission
Standard " (GB4915-2013), NOx emission limit value improves to 400 mg/Nm3 by 800mg/Nm3, held from January 1st, 2017
300 mg/Nm3 of row.Now, the cement kiln of key area and kiln tail afterheat utilizing system NOx emission limit are 300 mg/Nm3,
Some areas discharged nitrous oxides standard reaches 200 mg/Nm3 and 150 mg/Nm3, even lower.
Nitrogen oxides improvement at present is broadly divided into " denitration technological transformation+SNCR " and SCR two schemes, though wherein SCR technology
There is domestic case, but runing time, still less than 1 year, using effect needs further to be verified.So domestic existing cement production enterprise
Majority controls nitrogen oxide emission using " denitration technological transformation+SNCR ", and the above technology is used in saving ammonium hydroxide to greatest extent
Under the premise of amount, reach the denitration technology of cement plant environment protection emission.However, which kind of technology no matter is taken, it can only after denitration technological transformation
The dosage of ammonium hydroxide is reduced, and can fundamentally use ammonium hydroxide.Realizing that minimum discharge can be without participating in production of avoiding the peak hour
Under " temptation ", many cement plants reach minimum discharge requirement by nitrogen oxide emission by largely spraying ammonium hydroxide, excessive or even big
Width excess spray ammonium hydroxide not only causes the huge wasting of resources, but will greatly increase " the ammonia in the nitrogen oxides governance process of cement plant
, all there is huge hidden danger to follow-up equipment and environment in escape " problem.
Therefore, minimum discharge is no doubt, but is not reached by largely spraying ammonium hydroxide, and developing new technology can be more
It is further to save ammonium hydroxide or substitution ammonium hydroxide, it is only the direction that current cement plant denitration technology should be studied mainly.Therefore in water
On the basis of the research and development successfully of mud factory denitrfying agent, denitration pulvis is sent to dore furnace using a kind of powder denitrfying agent conveying device,
Reach nitrogen oxides minimum discharge on the basis of reduction ammonia volume, is very necessary.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of cement plant powder denitrfying agent conveying device, this hair
It is bright denitration pulvis to be accurately delivered to dore furnace according to dosage, while guaranteeing the minimum discharge of cement plant nitrogen oxides,
The use of ammonium hydroxide is saved to the greatest extent.In addition, the present invention also provides a kind of making for cement plant powder denitrfying agent conveying device
Use method.
To achieve the above object, the invention adopts the following technical scheme:
The first aspect of the present invention, provides a kind of cement plant powder denitrfying agent conveying device, including feed bin, activation hopper,
Pneumatic gate valve, metering batcher, weighing screw conveyor, gas-solid separator, feed appliance, roots blower and discharge nozzle, it is described
The top of feed bin is provided with feed inlet, and lower end is connected to the top of the activation hopper, and the bottom end of the activation hopper is connected to institute
The input end for stating metering batcher, is provided with pneumatic gate valve, the meter between the activation hopper and the metering batcher
The outlet end of amount batcher is connected to the input end of the weighing screw conveyor, the outlet end connection of the weighing screw conveyor
The gas-solid separator, the gas-solid separator are connected to the feed appliance, and the feed appliance is connected to the discharge nozzle, the discharging
One end of pipe connects the roots blower, and the other end connects dore furnace, the side wall in the feed bin be provided with pneumatic arch breaking device and
Vibrator.
The feed bin includes the cylindrical section from top to bottom set gradually and conical section as a preferred technical solution, described
Pneumatic arch breaking device is set as a plurality of and is located on the cylindrical section and the side wall of conical section, and the vibrator is set to the circle
On the side wall for boring section.
The pneumatic arch breaking device is set to the different height position of the cylindrical section side wall as a preferred technical solution,
On.
The side wall of the feed bin is provided with 3 level-sensing devices as a preferred technical solution, and 3 level-sensing devices are set respectively
It is placed in top, the cylindrical section and the junction of the conical section, the lower part of the conical section of the cylindrical section.
Safety valve is provided at the top of the feed bin as a preferred technical solution,.
The roots blower is frequency conversion type roots blower as a preferred technical solution,.
Pressure transmitter is provided on the discharge nozzle as a preferred technical solution, the pressure transmitter is set to
Between the roots blower and the feed appliance.
The second aspect of the present invention, provides a kind of application method of cement plant powder denitrfying agent conveying device, and use is above-mentioned
Cement plant powder denitrfying agent conveying device, comprising the following steps:
Step 1: powder denitrfying agent is delivered to feed inlet and enters feed bin by the air compressor of tank car subsequently enters activation
Hopper；
Step 2: Time Delay Opening roots blower, gas-solid separator, weigh screw conveyor and metering batcher；
Step 3: opening gate valve, powder denitrfying agent dosage is adjusted by the frequency of given metering batcher；
Step 4: opening pneumatic arch breaking and vibrator, guarantee that blanking is unobstructed.
Compared with prior art, the invention has the benefit that
(1) top, the lower part of feed bin middle cylindrical section of the present invention, the top of conical section are provided with pneumatic arch breaking device, together
When introduce pneumatic hammer broken arch, ensure that the smooth of pulvis blanking, solve pulvis and put up a bridge or hardened cause this unsmooth root of blanking
This problem.
(2) it is provided with weighing screw conveyor below present invention activation hopper, can accurately measures discharge quantity, presses simultaneously
Discharge quantity is precisely given according to the material quantity of setting, guarantees the accuracy of conveying pulvis.
(3) roots blower of the present invention is set as frequency conversion roots blower, and the frequency of blower is automatically adjusted in transmission process, is guaranteed
Smoothness and maximum energy-saving effect in pulvis transmission process.
(4) powder denitration conveying device structure of the present invention is simple, and manufacturing cost is cheap, and it is de- to be particularly suitable for cement plant powder
The conveying of nitre agent can achieve the effect that NO_x Reduction by Effective.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the overall structure diagram of powder denitrfying agent conveying device in cement plant of the present invention.
Wherein, appended drawing reference is described as follows: feed bin 1, level-sensing device 2, activation hopper 3, safety valve 4, pneumatic arch breaking device
5, batcher 6, pneumatic gate valve 7, gas-solid separator 8, pressure transmitter 9, roots blower 10, feed appliance 11, weighing spiral shell are measured
Revolve conveyer 12, feed inlet 13, vibrator 14, discharge nozzle 15, tank car 16.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, present embodiment discloses a kind of cement plant powder denitrfying agent conveying device, structure include feed bin 1,
Level-sensing device 2, activation hopper 3, safety valve 4, pneumatic arch breaking device 5, metering batcher 6, pneumatic gate valve 7, gas-solid separator 8, pressure
Power transmitter 9, roots blower 10, feed appliance 11, weighing screw conveyor 12, vibrator 14, discharge nozzle 15.Feed bin 1 include by
The cylindrical section and conical section set gradually under, pneumatic arch breaking device 5 are set as cylindrical section that is multiple and being located at pneumatic arch breaking device 5
On the different height position of side wall.Vibrator 14 is set on the side wall of conical section.The side wall of feed bin 1 is provided with 3 level-sensing devices
2,3 level-sensing devices 2 be respectively arranged at the top of cylindrical section, the junction of cylindrical section and conical section, conical section lower part.Feed bin 1
Whole stainless steel material, fluidized plate is arranged in tapering, while introducing and helping stream wind, prevents pulvis hardened during blanking, guarantees
Blanking is smooth.
The top of feed bin 1 is provided with feed inlet 13, and lower end is connected to the activation hopper 3 of a taper.Hopper 3 is activated using one
Formation type structure, no-welding-seam ensure that the fluency of blanking.The lower part for activating hopper 3 is installed by one pneumatic gate valve 7, activated material
3 lower ends of struggling against are communicated with a metering batcher 6, metering 6 lower end of batcher connection weighing screw conveyor 12, screw conveyor of weighing
12 lower ends are connected to gas-solid separator 8, and 8 lower end of gas-solid separator is connected to feed appliance 11, and the left side of feed appliance 11 is connected to roots blower
10 air outlets, install a pressure transmitter 9 between roots blower 10 and feed appliance 11, the discharge nozzle 15 on 11 right side of feed appliance is connected to
Dore furnace, roots blower 10 are frequency conversion type roots blower 10.
The cement plant powder denitrfying agent conveying device of the present embodiment is controlled by electric-automation control system and is run.System exists
During starting, directly to doses is fixed, automatic starting is clicked, whole system can start journey according to the equipment of setting automatically
Sequence successively starts roots blower 10, gas-solid separator 8, weighing auger conveyor 12, metering batcher 6, gate valve 7, vibrator
14, and opening of device gap is equipped with delay, it is ensured that and each equipment fully opens, according to the discharge quantity essence of setting after system starting
Standard is adjusted, it is ensured that the stability of flow conveying.When needing halt system, point is automatically stopped, successively time-delay closing vibrator 14, insert
Plate valve 7, metering batcher 6, weighing screw conveyor 12, gas-solid separator 8, roots blower 10 are according to determining complete under clout, equipment
It is completely empty, it is simple to operate.
The application method of powder denitrfying agent conveying device in cement plant of the present invention, includes the following steps:
Step 1: powder denitrfying agent, which is delivered to feed inlet 13 by the air compressor of tank car 16, enters feed bin 1 with laggard
Enter to activate hopper 3；
Step 2: Time Delay Opening roots blower 10, gas-solid separator 8, weigh screw conveyor 12 and metering batcher 6；
Step 3: opening gate valve 7, powder denitrfying agent dosage is adjusted by the frequency of given metering batcher 6；
Step 4: opening pneumatic arch breaking device 5 and vibrator 14, guarantee that blanking is unobstructed.
When the present embodiment is in use, powder denitrfying agent is delivered to feed inlet 13, powder by the air compressor of tank car 16
Denitrfying agent enters in feed bin 1, enters in activation hopper 3 under the action of pneumatic arch breaking device 5 and vibrator 14, and via activation
Hopper 3 is added to inside metering batcher 6, is entered back into weighing screw conveyor 12 and is delivered to gas-solid separator 8, and via gas-solid
Separator 8 is added to inside feed appliance 11, and the high-speed flow that roots blower 10 is discharged takes off its internal powder through feed appliance 11
Nitre agent is blown makes the powder denitrfying agent sprayed with high speed ejection to discharge nozzle 15, and powder denitrfying agent adding speed is fast, transfer efficiency
It is high.Output air speed can be controlled by adjusting the motor speed of roots blower 10, further control the use of powder denitrfying agent
Amount ensure that powder by the conveying capacity that weighing screw conveyor 12 controls powder denitrfying agent to improve the effect of denitrating flue gas
The efficient utilization of denitrfying agent.The system is set as automatic control system simultaneously, under auto state, clicks automatic starting, system from
Dynamic operation, is delivered to dore furnace for powder denitrfying agent according to the flow of setting；It clicks and stops, equipment is successively shut down, final to guarantee
There is no pulvis residuals in conveyance conduit.
Although above-described embodiment makes specific descriptions to the present invention, for those of ordinary skill in the art, answer
This is interpreted as to be modified or being changed based on present disclosure within spirit and scope of the invention not departing from
Into these modification and improvement are all within spirit and scope of the invention.
Claims (8)
1. a kind of cement plant powder denitrfying agent conveying device, which is characterized in that including feed bin (1), activate hopper (3), pneumatic slotting
Plate valve (7), metering batcher (6), weighing screw conveyor (12), gas-solid separator (8), feed appliance (11), roots blower
(10) and discharge nozzle (15), the top of the feed bin (1) are provided with feed inlet (13), the top of lower end and activation hopper (3)
End connection, the input end of bottom end connection metering batcher (6) of activation hopper (3), the activation hopper (3) and institute
It states and is provided with pneumatic gate valve (7) between metering batcher (6), the outlet end of metering batcher (6) is connected to the weighing
The outlet end of the input end of screw conveyor (12), weighing screw conveyor (12) is connected to the gas-solid separator (8), institute
It states gas-solid separator (8) and is connected to the feed appliance (11), the feed appliance (11) is connected to the discharge nozzle (15), the discharge nozzle
(15) one end connects the roots blower (10), and the other end connects dore furnace, and the side wall in the feed bin (1) is provided with pneumatically
Arch-Breaking Device (5) and vibrator (14).
2. a kind of cement plant powder denitration conveying device as described in claim 1, which is characterized in that the feed bin (1) includes
The cylindrical section and conical section from top to bottom set gradually, the pneumatic arch breaking device (5) are set as a plurality of and are located at the cylinder
On the side wall of section and conical section, the vibrator (14) is set on the side wall of the conical section.
3. a kind of cement plant powder denitration conveying device as claimed in claim 2, which is characterized in that the pneumatic arch breaking device
(5) it is set on the different height position of the cylindrical section side wall.
4. a kind of cement plant powder denitration conveying device as claimed in claim 2, which is characterized in that the side of the feed bin (1)
Wall is provided with 3 level-sensing devices (2), 3 level-sensing devices (2) be respectively arranged at the top of the cylindrical section, the cylindrical section with
The junction of the conical section, the conical section lower part.
5. a kind of cement plant powder denitration conveying device as described in claim 1, which is characterized in that the top of the feed bin (1)
Portion is provided with safety valve (4).
6. a kind of cement plant powder denitration conveying device as described in claim 1, which is characterized in that the roots blower (10)
For frequency conversion type roots blower (10).
7. a kind of cement plant powder denitration conveying device as described in claim 1, which is characterized in that on the discharge nozzle (15)
Be provided with pressure transmitter (9), the pressure transmitter (9) be set to the roots blower (10) and the feed appliance (11) it
Between.
8. a kind of application method of such as described in any item cement plant powder denitrfying agent conveying devices of claim 1-7, feature
It is, includes the following steps:
Step 1: powder denitrfying agent, which is delivered to feed inlet (13) by the air compressor of tank car (16), enters feed bin (1) then
Into activation hopper (3)；
Step 2: Time Delay Opening roots blower (10), gas-solid separator (8), weigh screw conveyor (12) and measure batcher
(6)；
Step 3: opening gate valve (7), powder denitrfying agent dosage is adjusted by the frequency of given metering batcher (6)；
Step 4: opening pneumatic arch breaking device (5) and vibrator (14), guarantee that blanking is unobstructed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374275.4A CN110053887A (en) | 2019-05-07 | 2019-05-07 | A kind of cement plant powder denitrfying agent conveying device and its application method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910374275.4A CN110053887A (en) | 2019-05-07 | 2019-05-07 | A kind of cement plant powder denitrfying agent conveying device and its application method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111686621A (en) * | 2020-04-11 | 2020-09-22 | 长沙矿山研究院有限责任公司 | Multi-material powdery additive preparation system and preparation method |
| CN114196427A (en) * | 2021-12-02 | 2022-03-18 | 北京航天石化技术装备工程有限公司 | Sealed automatic feeding device and method for waste plastic pyrolysis treatment system |
| CN116675005A (en) * | 2023-05-08 | 2023-09-01 | 广州绿华环保科技股份有限公司 | Denitration agent pneumatic conveying device |
| CN116986321A (en) * | 2023-08-14 | 2023-11-03 | 深圳市尚水智能股份有限公司 | Powder conveying control method and related device |
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