CN110270274B - Movable device for rapidly preparing modified material loaded with micro-nano oxygen bubbles - Google Patents
Movable device for rapidly preparing modified material loaded with micro-nano oxygen bubbles Download PDFInfo
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- CN110270274B CN110270274B CN201910654294.2A CN201910654294A CN110270274B CN 110270274 B CN110270274 B CN 110270274B CN 201910654294 A CN201910654294 A CN 201910654294A CN 110270274 B CN110270274 B CN 110270274B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/28—Moving reactors, e.g. rotary drums
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/006—Processes utilising sub-atmospheric pressure; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J3/00—Processes of utilising sub-atmospheric or super-atmospheric pressure to effect chemical or physical change of matter; Apparatus therefor
- B01J3/02—Feed or outlet devices therefor
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- 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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
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Abstract
The invention discloses a movable device for rapidly preparing a modified material loaded with micro-nano oxygen bubbles, which comprises: the device comprises a movable platform, a power system, a tank body, a vacuum system, a feeding and discharging system, an oxygen preparation system, a gear rotating system, a control system and the like. The device can be used for rapidly preparing the modified material loaded with the micro-nano oxygen bubbles by taking the movable platform as the movable supporting platform and adopting a method of modifying the porous substrate material by adopting a pure oxygen source under the negative pressure condition and controlling the exhaust, feeding, oxygenation, stirring and discharging.
Description
Technical Field
The invention relates to the technical field of environmental protection, in particular to a movable device for quickly preparing a modified material loaded with micro-nano oxygen bubbles.
Background
The problems of black and odorous water and eutrophication are a serious problem in water pollution in China. In a severely polluted water body, the content of dissolved oxygen is low, the transparency of the water body is reduced, sediment is in an anaerobic state, an aquatic ecosystem is seriously damaged, a plurality of large water bodies such as a honeycomb lake, a Taihu lake, a Dian pond and the like are already in a moderate or severe eutrophication state, a plurality of urban rivers and the like have serious oxygen deficiency at the bottom of the river channel due to long-term pollution discharge and pollutant sedimentation, a large amount of anaerobic substances are released, and then a black and odorous phenomenon is caused, so that the local economic development and the ecological civilization construction are adversely affected.
A large number of studies at home and abroad show that the micro-nano oxygen bubbles have the advantages of good stability, high oxygen mass transfer rate, no ecological environment risk and the like, and are widely applied to the aspect of water ecological restoration. The black and odorous and eutrophic water body is treated by adopting micro-nano oxygen bubbles, so that the concentration of organic pollutants in water can be effectively reduced, the anaerobic decomposition process of organic matters is weakened, the content of nitrogen and phosphorus nutrient salts in the water body is reduced, and the growth of algae is inhibited. In addition, negative charges exist on the gas-liquid interface of the micro-nano oxygen bubbles, the micro-nano oxygen bubbles can interact with specific pollutants, and free radicals and vibration waves generated during breakage of the micro-nano oxygen bubbles can promote removal of the pollutants.
At present, researchers use porous synthetic or natural materials as substrate materials, and load oxygen to synthesize micro-nano oxygen bubble modified materials, and directly convey and settle to an anaerobic sediment-water interface, so that the effects of improving water quality, increasing oxidation-reduction potential of the sediment-water interface and reducing endogenous pollution release are achieved. Under the condition that the exogenous pollution is effectively controlled, the method can relieve or eliminate the phenomenon of black and odorous water, and greatly quickens the recovery of the aquatic ecosystem.
The traditional technology has the following defects: at present, the modified material preparation device has the defects of large equipment volume, dependence on electric drive, difficulty in equipment movement, limitation in field use and the like, and the traditional preparation placement preparation efficiency is low, the operation is complex, and the modified material preparation device is inconvenient to use.
Disclosure of Invention
The invention aims to provide a movable device for quickly preparing a modified material loaded with micro-nano oxygen bubbles to solve the problem.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a but mobile device of modified material of quick preparation load micro-nano oxygen bubble, includes:
the whole power system adopts a high-efficiency diesel generator set and provides power for a feeding and discharging system, an oxygen preparation system, a vacuum system, a rotating system, a control system and the like;
the movable platform is provided with a modified material preparation power system, the movable platform is integrally made of steel through welding, a mounting seat matched with the modified material preparation system is mounted on the upper surface of the movable platform, a plurality of groups of driving wheels are mounted at the lower end of the movable platform, the movable platform is moved by traction of a driving vehicle, and a tank body is embedded at the upper end of the movable platform;
the feeding system adopts a self-suction type and metering type feeding, the feeding system is embedded in one side of the interior of the tank body and comprises a feeding pipe, a feeding one-way valve and a metering probe, one end of the feeding pipe penetrates through one side of the tank body, the feeding one-way valve is installed at one end of the feeding pipe, the metering probe is embedded in the feeding pipe, the discharging system is connected with a spraying system, the feeding end of the discharging system is provided with a high-frequency oscillator, the discharging end of the discharging system is provided with a one-way blade to rotate a discharging structure, and the discharging system is embedded in the other side of the tank body;
the oxygen preparation system is arranged on one side of the tank body through a support and comprises an oxygen generator, a booster pump and an oxygen storage tank, the oxygen generator is connected with the movable platform through the support, the oxygen storage tank is arranged on one side of the oxygen generator, the oxygen generator and the oxygen storage tank are connected through a conveying pipeline, the booster pump is arranged at the end of the conveying pipeline, a discharge pipe is arranged at one end of the oxygen storage tank, and one end of the discharge pipe is communicated with the inside of the tank body;
the vacuum system is arranged in the tank body and comprises a pump body pipeline, a vacuum pump and a filter screen, the pump body pipeline penetrates through one side of the tank body, the other end of the pump body pipeline is communicated with the inside of the tank body, the vacuum pump is arranged at one end of the pump body pipeline, and the filter screen is embedded at one end port of the pump body pipeline;
the rotating system is connected with the tank body and realizes the rotation of the tank body through gear transmission;
the control system is installed on one side of the upper end of the movable platform and consists of a processor and a display screen, and the control system is electrically connected with the feeding system, the discharging system, the oxygen preparation system, the vacuum system and the rotating system respectively.
Preferably, the modified material preparation power system of the movable platform and the traction vehicle running power system are arranged independently.
Preferably, the outer wall of the tank body is sprayed with a fireproof coating, and the tank body is integrally formed by pressing stainless steel materials.
Preferably, the feeding and discharging system is communicated with a control system, and the control system regulates the feeding and discharging system to intermittently perform feeding and discharging operations.
Preferably, the connection part of the discharging system and the vacuum system adopts a bearing seal.
Preferably, the vacuum system and the oxygen preparation system are communicated with a control system, and the control system regulates and controls the vacuum system and the oxygen preparation system to cooperate to realize air suction, filter screen blowing and oxygen load.
Preferably, the oxygen preparation system realizes the functions of sweeping the filter screen and supplying oxygen to the tank body through a pipeline in the tank body shared by the vacuum system.
Preferably, the control system controls various electromagnetic valves and opening and closing machines by collecting data such as flow, pressure and the like according to a set control program, and the liquid crystal touch screen performs centralized display and monitoring and background parameter setting.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention abandons the defects of large equipment volume, dependence on electric drive, difficult equipment movement, limited field use and the like of the traditional preparation device of the modified material, and effectively realizes the rapid preparation of the modified material loaded with micro-nano oxygen bubbles by controlling exhaust, feeding, oxygenation, stirring and discharging;
2. the device designed by the invention does not produce pollution of wastewater, waste residue and the like, can be constructed nearby according to project site construction conditions without the limitation of power supply, is convenient for subsequent transportation and material on-site throwing and scattering, and is simple and convenient to operate;
3. according to the device, the movable platform is used as a movable supporting platform, the method of modifying the porous substrate material by adopting the pure oxygen source is adopted under the negative pressure condition, the modified material loaded with micro-nano bubbles can be rapidly prepared by controlling air exhaust, feeding, oxygen addition, stirring and discharging, the device can be used for remarkably improving the micro-nano oxygen bubble load rate of the substrate material, is convenient to operate, can be used for preparing the modified material loaded with micro-nano bubbles on site in a large scale, shortens the transportation link, reduces the overflow phenomenon of the oxygen micro-nano bubbles in the transportation process, and is more convenient and efficient to use in the water ecological restoration engineering.
Drawings
FIG. 1 is a front view of an overall mobile device for rapidly preparing a modified material loaded with micro-nano oxygen bubbles;
FIG. 2 is a schematic diagram of a tank structure of a mobile device for rapidly preparing a modified material loaded with micro-nano oxygen bubbles;
FIG. 3 is a schematic structural diagram of a vacuum system of a movable device for rapidly preparing a modified material loaded with micro-nano oxygen bubbles;
FIG. 4 is a schematic structural diagram of a mobile device oxygen preparation system for rapidly preparing a modified material loaded with micro-nano oxygen bubbles;
fig. 5 is a schematic structural diagram of a movable device feeding system for rapidly preparing a modified material loaded with micro-nano oxygen bubbles.
In the figure: 1. a power system; 2. a movable platform; 3. a discharge system; 4. an oxygen production system; 401. an oxygen generator; 402. a booster pump; 403. an oxygen storage tank; 404. a delivery conduit; 405. a discharge pipe; 5. a vacuum system; 501, pump body pipeline; 502. a vacuum pump; 503. a filter screen; 6. a tank body; 7. a control system; 8. a rotation system; 9. a feed system; 901. a feed pipe; 902. a feed check valve; 903. a metering probe.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: the utility model provides a but mobile device of modified material of quick preparation load micro-nano oxygen bubble, includes:
the system comprises a power system 1, wherein the power system 1 integrally adopts a high-efficiency diesel generator set to provide power for a feeding and discharging system, an oxygen preparation system, a vacuum system, a rotating system, a control system and the like;
the movable platform 2 is provided with a modified material preparation power system, the whole movable platform 2 is made of steel materials through welding, a mounting seat matched with the modified material preparation system is mounted on the upper surface of the movable platform 2, a plurality of groups of driving wheels are mounted at the lower end of the movable platform 2 and move through traction of a driving vehicle, and a tank body 6 is embedded in the upper end of the movable platform 2;
the feeding and discharging system is characterized in that the feeding system 9 adopts a self-suction type and metering type feeding mode, the feeding system 9 is embedded in one side of the interior of the tank body 6, the feeding system 9 comprises a feeding pipe 901, a feeding one-way valve 902 and a metering probe 903, one end of the feeding pipe 901 penetrates through one side of the tank body 6, the feeding one-way valve 902 is installed at one end of the feeding pipe 901, the metering probe 903 is embedded in the feeding pipe 901, the discharging system 3 is connected with a spraying system, a high-frequency oscillator is carried at the feeding end of the discharging system 3, a one-way blade rotating discharging structure is carried at the discharging end of the discharging system 3, and the discharging system 3 is embedded in the other side of the tank body 6;
the oxygen preparation system 4 is installed on one side of the tank body 6 through a support, the oxygen preparation system 4 comprises an oxygen generator 401, a booster pump 402 and an oxygen storage tank 403, the oxygen generator 401 is connected with the movable platform 2 through the support, the oxygen storage tank 403 is installed on one side of the oxygen generator 401, the oxygen generator 401 and the oxygen storage tank 403 are connected through a conveying pipeline 404, the booster pump 402 is installed at the end of the conveying pipeline 404, a discharge pipe 405 is installed at one end of the oxygen storage tank 403, and one end of the discharge pipe 405 is communicated with the inside of the tank body 6;
the vacuum system 5 is installed inside the tank body 6, the vacuum system 5 comprises a pump body pipeline 501, a vacuum pump 502 and a filter screen 503, the pump body pipeline 501 penetrates through one side of the tank body 6, the other end of the pump body pipeline 501 is communicated with the inside of the tank body 6, the vacuum pump 502 is installed at one end of the pump body pipeline 501, and the filter screen 503 is embedded at one end port of the pump body pipeline 501;
the rotating system 8 is connected with the tank body 6, and the rotating system 8 realizes the rotation of the tank body 6 through gear transmission;
the device comprises a control system 7, wherein the control system 7 is installed on one side of the upper end of the movable platform 2, the control system 7 is composed of a processor and a display screen, and the control system 7 is electrically connected with a feeding system 9, a discharging system 3, an oxygen preparation system 4, a vacuum system 5 and a rotating system 8 respectively.
In the invention, the power system for preparing the modified material of the movable platform 2 and the power system of the traction vehicle are arranged relatively independently.
In the invention, the fireproof paint is sprayed on the outer wall of the tank body 6, and the tank body 6 is integrally formed by pressing stainless steel materials, so that the service life of the tank body 6 is prolonged.
In the invention, the feeding and discharging system is communicated with the control system 7, and the control system 7 regulates and controls the feeding and discharging system to intermittently perform feeding and discharging operations.
Preferably, the connection part of the discharging system 3 and the vacuum system 5 is sealed by a bearing, so that the vacuum degree of the tank body 6 during the stirring of the rotating substrate material is guaranteed.
Preferably, the vacuum system 5 and the oxygen preparation system 4 are communicated with a control system 7, and the control system 7 regulates and controls the vacuum system 5 and the oxygen preparation system 4 to cooperate to realize air suction, filter screen 503 purging and oxygen load.
Preferably, the oxygen production system 4 performs the functions of purging the filter screen 503 and supplying oxygen to the tank 6 through a pipeline in the tank 6 shared with the vacuum system 5.
Preferably, the control system 7 controls various electromagnetic valves and opening and closing machines according to a set control program by collecting data such as flow, pressure and the like, the liquid crystal touch screen performs centralized display and monitoring, and background parameter setting, so that full-automatic or semi-automatic control of the preparation process of the modified material is realized, and the preparation process requirements are met.
The working principle is as follows: the moving device is stopped in an open area, the control system 7 is opened, a series of control of feeding, vacuum, rotation, oxygenation, purging, discharging and the like is carried out according to a set program and set parameters, firstly, a one-way valve of the feeding system 9 is opened, feeding is carried out in a base material packaging bag, the feeding reaches a preset value, a valve of the feeding system 9 is closed, then, the vacuum system 5 carries out vacuum operation according to preset vacuum parameters, a vacuum pump 502 of the vacuum system 5 carries out vacuum pumping on the tank body 6, and the pressure in the tank is ensured to be less than or equal to-0.05 Mpa; meanwhile, the tank body 6 is driven by the gear rotating system 8 to rotate at the rotating speed of 20-40 rpm, so that air in the base material in the tank body 6 is fully released, and the process is maintained for 15 minutes; when the filter screen 503 of the vacuum system 5 is blocked by particles, the vacuum pump 502 of the vacuum system 5 is closed; the hyperbaric oxygen jar system is opened, and the air in the oxygen storage tank 403 in the oxygen preparation system 4 can be in the pulse release in the twinkling of an eye and sweep vacuum system 5 filter screen 503, blows off the material that adsorbs on the filter core, makes the filter core can keep normal filter area, reciprocates several times under control system 7's control, realizes the vacuum of jar body 6.
When the vacuum degree meets the requirement, the vacuum pump 502 and the one-way valve of the vacuum system 5 are closed, the one-way valve of the oxygen preparation system 4 is opened, quantitative high-pressure oxygen is filled into the tank body 6, oxygen load is carried out under the stirring action, the pressure in the tank body 6 is enabled to be more than or equal to 0.12Mpa, the pressure is maintained for 20 minutes, the constant-speed rotation state of the tank body 6 is ensured, the rotating speed is 20-40 r/min, the substrate porous material is ensured to be fully contacted with the oxygen, and the oxygen load rate requirement of the modified.
During the ejection of compact, 8 stall of gear rotating system, automatic sprinkling system are sprayed on the spot and are used to ejection of compact system 3 joinable, or connect the baling press and construct and pack, 3 check valves of ejection of compact system are opened, ejection of compact under the malleation effect in jar body 6, 4 booster pumps 402 of oxygen preparation system continuously provide the malleation under control system 7 effects, 3 feed ends of ejection of compact system carry on high frequency oscillator, avoid the raw materials to block up the feed end, 3 discharge ends of ejection of compact system carry on one-way blade and rotate ejection of compact structure, accomplish ejection of compact operation smoothly.
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 (8)
1. The utility model provides a but mobile device of modified material of quick preparation load micro-nano oxygen bubble which characterized in that includes:
the whole power system (1) adopts a diesel generator set and provides power for the feeding and discharging system, the oxygen preparation system, the vacuum system, the rotating system and the control system;
the movable platform (2) is provided with a modified material preparation power system, the movable platform (2) is integrally made of steel through welding, a mounting seat matched with the modified material preparation system is mounted on the upper surface of the movable platform (2), a plurality of groups of driving wheels are mounted at the lower end of the movable platform (2), the movable platform is driven to move by driving a vehicle, and a tank body (6) is embedded at the upper end of the movable platform (2);
the feeding and discharging system is characterized in that the feeding system (9) adopts self-suction and metering feeding, the feeding system (9) is embedded in one side of the inside of the tank body (6), the feeding system (9) comprises a feeding pipe (901), a feeding one-way valve (902) and a metering probe (903), one end of the feeding pipe (901) penetrates through one side of the tank body (6) to be arranged, the feeding one-way valve (902) is installed at one end of the feeding pipe (901), the metering probe (903) is embedded in the feeding pipe (901), the discharging system (3) is connected with a spraying system, the feeding end of the discharging system (3) is loaded with a high-frequency oscillator, the discharging end of the discharging system (3) is loaded with a one-way blade rotating discharging structure, and the discharging system (3) is embedded in the other side of the tank body (;
the oxygen preparation system (4) is installed on one side of the movable platform (2) through a support, the oxygen preparation system (4) comprises an oxygen generator (401), a booster pump (402) and an oxygen storage tank (403), the oxygen generator (401) is connected with the movable platform (2) through the support, the oxygen storage tank (403) is installed on one side of the oxygen generator (401), the oxygen generator (401) and the oxygen storage tank (403) are connected through a conveying pipeline (404), the booster pump (402) is installed at the end of the conveying pipeline (404), a discharge pipe (405) is installed at one end of the oxygen storage tank (403), and one end of the discharge pipe (405) is communicated with the interior of the tank body (6);
the vacuum system (5) is installed inside the tank body (6), the vacuum system (5) comprises a pump body pipeline (501), a vacuum pump (502) and a filter screen (503), the pump body pipeline (501) penetrates through one side of the tank body (6), the other end of the pump body pipeline (501) is communicated with the inside of the tank body (6), the vacuum pump (502) is installed at one end of the pump body pipeline (501), and the filter screen (503) is embedded at the port of the other end of the pump body pipeline (501);
the rotating system (8), the rotating system (8) is connected with the tank body (6), and the rotating system (8) realizes the rotation of the tank body (6) through gear transmission;
the device comprises a control system (7), wherein the control system (7) is installed on one side of the upper end of the movable platform (2), the control system (7) is composed of a processor and a display screen, and the control system (7) is electrically connected with a feeding system (9), a discharging system (3), an oxygen preparation system (4), a vacuum system (5) and a rotating system (8) respectively.
2. The movable device for rapidly preparing the modified material loaded with micro-nano oxygen bubbles according to claim 1, is characterized in that: the power system for preparing the modified material of the movable platform (2) and the power system of the traction vehicle are arranged relatively independently.
3. The movable device for rapidly preparing the modified material loaded with micro-nano oxygen bubbles according to claim 1, is characterized in that: the spraying of the outer wall of the tank body (6) is provided with fireproof paint, and the tank body (6) is integrally formed by pressing stainless steel materials.
4. The movable device for rapidly preparing the modified material loaded with micro-nano oxygen bubbles according to claim 1, is characterized in that: the feeding and discharging system is communicated with the control system (7), and the control system (7) regulates and controls the feeding and discharging system to intermittently perform feeding and discharging operations.
5. The movable device for rapidly preparing the modified material loaded with micro-nano oxygen bubbles according to claim 1, is characterized in that: and the connection part of the discharging system (3) and the vacuum system (5) is sealed by a bearing.
6. The movable device for rapidly preparing the modified material loaded with micro-nano oxygen bubbles according to claim 1, is characterized in that: the vacuum system (5) and the oxygen preparation system (4) are communicated with the control system (7), and the control system (7) regulates and controls the vacuum system (5) to be matched with the oxygen preparation system (4) to realize air suction, filter screen blowing (503) and oxygen load.
7. The movable device for rapidly preparing the modified material loaded with micro-nano oxygen bubbles according to claim 1, is characterized in that: the oxygen preparation system (4) realizes the functions of purging the filter screen (503) and supplying oxygen to the tank body (6) through an inner pipeline of the tank body (6) shared by the vacuum system (5).
8. The movable device for rapidly preparing the modified material loaded with micro-nano oxygen bubbles according to claim 1, is characterized in that: the control system (7) controls various electromagnetic valves and opening and closing machines by collecting flow and pressure data according to a set control program, and the liquid crystal touch screen displays and monitors background parameter settings in a centralized manner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910654294.2A CN110270274B (en) | 2019-07-19 | 2019-07-19 | Movable device for rapidly preparing modified material loaded with micro-nano oxygen bubbles |
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| CN201910654294.2A CN110270274B (en) | 2019-07-19 | 2019-07-19 | Movable device for rapidly preparing modified material loaded with micro-nano oxygen bubbles |
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| CN110270274A CN110270274A (en) | 2019-09-24 |
| CN110270274B true CN110270274B (en) | 2020-12-22 |
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| FR2673853B1 (en) * | 1991-03-12 | 1993-07-16 | Leflond Odile | UNDERWATER ROTATING MIXER REACTOR, PARTICULARLY FOR THE ANAEROBIC FERMENTATION OF HUMIDIFIED HOUSEHOLD GARBAGE. |
| CN203990654U (en) * | 2014-08-08 | 2014-12-10 | 四川国星高分子树脂有限公司 | Normal temperature asphalt modifier is produced reactor |
| CN206641225U (en) * | 2017-03-22 | 2017-11-17 | 射洪县涵馨农业有限公司 | A kind of aquaculture aerator |
| CN108820893A (en) * | 2018-07-09 | 2018-11-16 | 安徽泽加业粉体工程有限公司 | A kind of powder concentrated phase positive pressure delivery pump |
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