CN113291818A - Jet pump system for carrying out mixed collision of steam and powder - Google Patents

Jet pump system for carrying out mixed collision of steam and powder Download PDF

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Publication number
CN113291818A
CN113291818A CN202110711575.4A CN202110711575A CN113291818A CN 113291818 A CN113291818 A CN 113291818A CN 202110711575 A CN202110711575 A CN 202110711575A CN 113291818 A CN113291818 A CN 113291818A
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powder
pipe
steam
jet pump
tank
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CN202110711575.4A
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Chinese (zh)
Inventor
韦可壮
廖弘苗
洪欣欣
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Priority to CN202110711575.4A priority Critical patent/CN113291818A/en
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    • 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
    • B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/16—Gas pressure systems operating with fluidisation of the materials
    • 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
    • B65G53/36—Arrangements of containers
    • 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
    • B65G53/40—Feeding or discharging devices
    • B65G53/46—Gates or sluices, e.g. rotary wheels
    • 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
    • B65G53/52—Adaptations of pipes or tubes
    • 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
    • B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
    • 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
    • B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
    • B65G2201/04—Bulk

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Transport Of Granular Materials (AREA)
  • Jet Pumps And Other Pumps (AREA)

Abstract

A jet pump system for mixing and conveying by utilizing collision of steam and powder comprises a powder tank, a discharge pipe in the tank, a powder conveying pipeline, a Laval jet pump, a thermal cracking reactor, a steam pipe and a conveying pipe; the powder tank is provided with a feed valve, an air inlet valve, a pressure relief and exhaust valve, a radar level gauge and a first pressure gauge; a discharge valve is arranged on the discharge pipe in the tank and is connected with a discharge pneumatic pipe in the powder tank; a feed port of the Laval jet pump is provided with a jet pump feed control valve, and the Laval jet pump is communicated with a discharge pipe in the tank through a powder conveying pipeline; the steam pipe is provided with a steam pressure gauge of the steam distribution cylinder, a steam thermometer of the steam distribution cylinder and a superheated steam control valve; the thermal cracking reactor is communicated with a Laval jet pump through a material conveying pipe; a second pressure gauge is arranged on the material conveying pipe. The jet pump system provided by the invention pneumatically conveys the powder into the super-critical high-temperature high-pressure thermal cracking reactor for pyrolysis reaction, and has the advantages of high efficiency, energy saving and safe use.

Description

Jet pump system for carrying out mixed collision of steam and powder
Technical Field
The invention relates to the technical field of powder pneumatic and thermal transmission, in particular to a jet pump system for carrying out collision mixing transmission by utilizing steam and powder.
Background
The industrial powder production category is generally divided into non-metal powder, metal powder and functional powder, and common non-metal ore powder includes: calcium carbonate, silica micropowder, talc, barite, wollastonite, kaolin, bentonite, dolomite, limestone, wollastonite powder, mica, diatomaceous earth, sepiolite, tourmaline and the like; common metal ore and metal oxide powders are: metal powders, metal oxide powders and alloy powders of gold, silver, copper, iron, aluminum, zinc, manganese, titanium and the like; common functional powder: magnesium hydroxide, aluminum oxide, titanium dioxide, white carbon black, iron oxide red, pearl mica, zinc oxide, fly ash, nano powder and the like; the powder is very important in all links of industrial production, processing, transportation and use.
With the continuous development of modern industry, along with the technological progress of new materials and related industries, the application range of powder technology for fine processing treatment of industrial raw materials is continuously expanded, the powder technology is widely used in industry, and the powder with various specifications also plays an important role in the related industries of plastics, papermaking, coatings, rubber, building materials, medicines, new energy and the like, wherein the powder with various particle sizes, the ultrafine powder, the micro-nano powder and the like are widely applied to the related industries.
The powder production and application process can not be separated from the powder conveying mode, generally speaking, the powder conveying mainly comprises the following steps: dry conveying (comprising three types of mechanical conveying, pneumatic conveying and container output) and wet conveying (comprising two types of hydraulic conveying and slurry conveying), but the existing powder conveying equipment has the defects of poor safety and insufficient energy conservation.
Disclosure of Invention
Objects of the invention
In order to solve the technical problems in the background art, the invention provides a jet pump system for carrying out mixed transportation by utilizing collision of steam and powder.
(II) technical scheme
The invention provides a jet pump system for carrying out mixed transportation by utilizing collision of steam and powder, which comprises a powder tank, a discharge pneumatic pipe, a discharge pipe in the tank, a powder conveying pipeline, a Laval jet pump, a thermal cracking reactor, a steam pipe and a conveying pipe, wherein the powder tank is provided with a plurality of nozzles;
the powder tank is provided with a feed valve for communicating with external powder conveying equipment, an air inlet valve for communicating with compressed gas equipment, a pressure relief and exhaust valve, a radar material level meter for detecting the material level of powder in the powder tank and a first pressure gauge for detecting the air pressure in the powder tank;
a discharge valve is arranged on the discharge pipe in the tank, the discharge pipe in the tank is connected with the powder tank, a feed pipe orifice of the discharge pipe in the tank extends into the powder tank, and a discharge pipe orifice of the discharge pneumatic pipe is connected; the discharging pneumatic pipe is connected with the inner wall of the powder tank;
the feeding pipe orifice of the powder conveying pipeline is connected with the discharging pipe orifice of the discharging pipe in the tank, and the discharging pipe orifice of the powder conveying pipeline is connected with the feeding port of the Laval jet pump;
a feed port of the Laval jet pump is provided with a jet pump feed control valve, and an air inlet pipe orifice of the Laval jet pump is connected with an air outlet pipe orifice of a steam pipe for conveying high-temperature steam;
a steam pressure gauge, a steam thermometer and a superheated steam control valve of the steam cylinder are sequentially arranged on the steam pipe along the steam flowing direction;
the feeding pipe orifice of the conveying pipe is connected with the discharging end of the Laval jet pump, a second pressure gauge is arranged on the conveying pipe, and the discharging pipe orifice of the conveying pipe is connected with the feeding port of the thermal cracking reactor.
Preferably, the Laval jet pump comprises a steam Laval ejector, a steam-powder mixing collision air suction chamber, a powder gas delivery exhaust pipe, an ejector throat pipe and an ejector diffusion pipe;
the air inlet port of the steam Laval ejector is connected with the steam outlet pipe orifice of the steam pipe, and the air outlet port of the steam Laval ejector is connected with the air inlet port of the steam powder mixing collision air suction chamber;
the gas inlet port of the powder gas delivery exhaust pipe is connected with the gas outlet pipe orifice of the powder conveying pipeline, and the gas outlet port of the powder gas delivery exhaust pipe is connected with the feed port of the gas-powder mixing collision suction chamber;
the inlet pipe orifice of the ejector throat is connected with the outlet port of the gas-powder mixing collision air suction chamber, and the outlet pipe orifice of the ejector throat is connected with the inlet pipe orifice of the ejector diffusion pipe; the discharge pipe orifice of the injector diffusion pipe is connected with the feed pipe orifice of the feed delivery pipe.
Preferably, the internal diameter of the ejector throat decreases progressively in the direction of flow of the material therein.
Preferably, the inner diameter of the diffuser pipe of the ejector in the flow direction of the material therein is gradually increased.
A use method of a jet pump system for carrying out collision mixing conveying by utilizing steam and powder comprises the following specific steps:
s1, starting a feed valve, a pressure relief exhaust valve and a radar level gauge, and closing an air inlet valve and a discharge valve;
s2, introducing the powder into the powder tank from the feed valve by external powder conveying equipment until the material level of the powder in the powder tank reaches a set value detected by a radar material level meter, and stopping feeding the powder into the powder tank;
s3, closing the feeding valve and the pressure relief exhaust valve, and starting the air inlet valve;
s4, introducing compressed gas into the powder tank through an air inlet valve by using compressed gas equipment, and stopping introducing the compressed gas into the powder tank until the air pressure in the powder tank detected by a first pressure gauge reaches a set value;
s5, detecting whether the steam pressure and the steam temperature in the steam pipe reach set values through a steam pressure meter and a steam temperature meter of the air cylinder;
if yes, go to S6;
if not, continuing to monitor the steam in the steam pipe;
s6, starting a discharge valve, an overheated steam control valve and a jet pump feeding control valve, enabling powder in a powder tank to enter a Laval jet pump along a discharge pneumatic pipe, a discharge pipe in the tank and a powder conveying pipeline, enabling high-temperature steam to enter the Laval jet pump from a steam pipe to react with the powder, and conveying the high-temperature steam into a thermal cracking reactor for cracking;
and S7, when the radar level gauge detects that the powder level in the powder tank drops to a set value, closing the air inlet valve, the discharge valve, the superheated steam control valve and the jet pump feeding control valve at the same time.
Preferably, the air pressure value detected by the first pressure gauge in S4 is 0.4-0.6 MPa.
Preferably, the air pressure value detected by the steam pressure gauge of the steam splitting cylinder in the S5 is 0.4-0.6 MPa.
Compared with the prior art, the technical scheme of the invention has the following beneficial technical effects:
the jet pump system for mixing and conveying by utilizing the collision of the steam and the powder has simple operation and convenient use, utilizes the high-pressure gas to push the powder to flow along the pipeline, and the powder reacts with the high-temperature and high-pressure hot steam in the Laval jet pump and is conveyed to the thermal cracking reactor for the powder pyrolysis and crushing work reaction by taking the high-temperature and high-pressure superheated steam as the power; in addition, the superfine powder and the compressed air have good fluidity after being mixed, the powder can be quickly pushed and conveyed in the gas-powder mixing clash air suction chamber, the powder conveying efficiency is high, and the powder conveying is safer;
the jet pump system equipment for carrying out the collisional mixing of the steam and the powder has the advantages of small floor area, high automation degree and convenient maintenance, can meet the requirements of powder conveying in the production and application processes of powder enterprises such as nonmetal powder, metal and metal oxide powder, functional powder and the like, is safer, more energy-saving and more efficient in powder conveying, has wide market application prospect, and is worthy of popularization.
Drawings
Fig. 1 is a schematic structural diagram of a jet pump system for colliding, mixing and conveying vapor and powder according to the present invention.
Fig. 2 is a schematic structural diagram of a laval jet pump in a jet pump system for delivering by colliding and mixing vapor and powder.
Reference numerals: 1. a powder tank; 2. a discharging pneumatic tube; 3. a feed valve; 4. a discharge pipe in the tank; 5. an intake valve; 6. a pressure relief exhaust valve; 7. a discharge valve; 8. a radar level gauge; 9. a first pressure gauge; 10. a powder delivery conduit; 11. a steam pressure gauge of the steam-distributing cylinder; 12. a steam thermometer of the steam distributing cylinder; 13. a superheated steam control valve; 14. a jet pump feed control valve; 15. a laval jet pump; 16. a second pressure gauge; 17. a thermal cracking reactor; 18. a steam pipe; 101. a steam laval injector; 102. the gas-powder mixing collision air suction chamber; 103. powder gas is sent to the exhaust tube; 104. an ejector throat; 105. an injector diffuser tube.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1-2, the jet pump system for mixing and conveying by colliding steam and powder provided by the present invention comprises a powder tank 1, a discharging pneumatic pipe 2, a discharging pipe 4 in the tank, a powder conveying pipeline 10, a laval jet pump 15, a thermal cracking reactor 17, a steam pipe 18 and a conveying pipe;
the powder tank 1 is provided with a feed valve 3 for communicating with external powder conveying equipment, an air inlet valve 5 for communicating with compressed gas equipment, a pressure relief and exhaust valve 6, a radar level gauge 8 for detecting the level of powder in the powder tank 1 and a first pressure gauge 9 for detecting the pressure in the powder tank 1;
it should be noted that, the powder is introduced into the powder tank 1 from the feed valve 3, but the powder is selected and not limited to be injected into the powder tank 1 from the feed valve 3 by using compressed air or pneumatic wind pressure of a roots blower, and when the powder is introduced into the powder tank 1, the pressure relief and exhaust valve 6 is started to balance the air pressure in the powder tank 1 to ensure that the powder can be introduced into the powder tank 1;
a discharge valve 7 is arranged on the discharge pipe 4 in the tank, the discharge pipe 4 in the tank is connected with the powder tank 1, a feed pipe opening of the discharge pipe 4 in the tank extends into the powder tank 1, and a discharge pipe opening of the discharge pneumatic pipe 2 is connected; the discharging pneumatic tube 2 is connected with the inner wall of the powder tank 1;
the feeding pipe orifice of the powder conveying pipeline 10 is connected with the discharging pipe orifice of the discharging pipe 4 in the tank, and the discharging pipe orifice of the powder conveying pipeline 10 is connected with the feeding port of the Laval jet pump 15;
a feed port of the Laval jet pump 15 is provided with a jet pump feed control valve 14, and an air inlet pipe orifice of the Laval jet pump 15 is connected with an air outlet pipe orifice of a steam pipe 18 for conveying high-temperature steam;
the steam pipe 18 is sequentially provided with a cylinder steam pressure gauge 11, a cylinder steam thermometer 12 and a superheated steam control valve 13 along the steam flowing direction;
the feeding pipe mouth of the conveying pipe is connected with the discharging end of the Laval jet pump 15, the conveying pipe is provided with a second pressure gauge 16, and the discharging pipe mouth of the conveying pipe is connected with the feeding port of the thermal cracking reactor 17.
In an alternative embodiment, the laval jet pump 15 includes a steam laval ejector 101, a steam-powder mixing impinging suction chamber 102, a powder gas suction pipe 103, an ejector throat 104, and an ejector diffuser 105;
an air inlet port of the steam Laval ejector 101 is connected with an air outlet pipe port of the steam pipe 18, and an air outlet port of the steam Laval ejector 101 is connected with an air inlet port of the steam-powder mixing collision air suction chamber 102;
the air inlet port of the powder air feeding and pumping pipe 103 is connected with the air outlet pipe orifice of the powder conveying pipeline 10, and the air outlet port of the powder air feeding and pumping pipe 103 is connected with the feed port of the gas-powder mixing collision air suction chamber 102;
the inlet orifice of the ejector throat 104 is connected with the outlet orifice of the gas-powder mixing collision air suction chamber 102, and the outlet orifice of the ejector throat 104 is connected with the inlet orifice of the ejector diffusion tube 105; the discharge pipe orifice of the injector diffusion pipe 105 is connected with the feed pipe orifice of the feed delivery pipe;
it should be noted that the steam laval injector 101, the steam-powder mixing collision suction chamber 102, the powder gas delivery and suction pipe 103 and the injector throat 104 are connected in a welding manner; the ejector throat 104 and the ejector diffuser 105 are connected by welding.
In an alternative embodiment, the ejector throat 104 has a decreasing inner diameter in the direction of flow of the material therein.
In an alternative embodiment, the injector diffuser tube 105 has a gradually increasing inner diameter along the direction of material flow therein.
A use method of a jet pump system for carrying out collision mixing conveying by utilizing steam and powder comprises the following specific steps:
s1, starting the feed valve 3, the pressure relief exhaust valve 6 and the radar level gauge 8, and closing the air inlet valve 5 and the discharge valve 7;
s2, introducing powder into the powder tank 1 from the feed valve 3 by external powder conveying equipment until the level of the powder in the powder tank 1 detected by the radar level gauge 8 reaches a set value, and stopping feeding the powder into the powder tank 1;
s3, closing the feed valve 3 and the pressure relief exhaust valve 6, and starting the intake valve 5;
s4, introducing compressed gas into the powder tank 1 through the gas inlet valve 5 by using compressed gas equipment, and stopping introducing gas into the powder tank 1 until the first pressure gauge 9 detects that the gas pressure in the powder tank 1 reaches a set value;
it should be noted that, when the powder in the powder tank 1 reaches the set material level state, under the action of compressed air pressure, compressed air firstly enters the bottom of the discharge pipe 4 in the tank through the discharge pneumatic pipe 2 to perform pneumatic loosening of the powder at the discharge port, the discharge valve 7 is opened, and at this time, the mixed airflow of the compressed air and the powder is continuously conveyed from the outlet at the bottom of the discharge pipe 4 in the tank to the powder conveying pipeline 10 under the action of compressed air pressure in the powder tank 1, the powder conveying principle is similar to a fire extinguisher dry powder conveying and spraying principle, and the powder can control the powder conveying flow according to the pipe diameter and the compressed air pressure;
s5, detecting whether the steam pressure and the steam temperature in the steam pipe 18 reach set values through the steam pressure gauge 11 and the steam temperature gauge 12 of the cylinder; wherein, the steam temperature is set according to the requirement;
if yes, go to S6;
if not, continuing to monitor the steam in the steam pipe 18;
s6, starting a discharge valve 7, an overheated steam control valve 13 and a jet pump feeding control valve 14, enabling powder in a powder tank 1 to enter a Laval jet pump 15 along a discharge pneumatic pipe 2, a tank discharge pipe 4 and a powder conveying pipeline 10, enabling high-temperature steam to enter the Laval jet pump 15 from a steam pipe 18 to react with the powder, and conveying the powder into a thermal cracking reactor 17 for cracking;
s7, when the radar level gauge 8 detects that the powder level in the powder tank 1 is reduced to a set value, closing the air inlet valve 5, the discharge valve 7, the superheated steam control valve 13 and the jet pump feeding control valve 14 at the same time;
further, two powder tanks 1 are arranged; two powder jars 1, steam pipe 18, laval jet pump 15 correspond with thermal cracking reactor 17, and when one in two powder jars 1 supplied the material to laval jet pump 15, another powder jar 1 was reinforced, through two powder jars 1 work in turn, realized the continuity work of this system, improved the pay-off efficiency of powder.
In an alternative embodiment, the air pressure detected by the first pressure gauge 9 in S4 is 0.4-0.6 MPa.
In an alternative embodiment, the air pressure value detected by the steam pressure gauge 11 of the branch cylinder in S5 is 0.4-0.6 MPa.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (7)

1. A jet pump system for mixing and conveying by utilizing vapor-powder collision is characterized by comprising a powder tank (1), a discharge pneumatic pipe (2), a discharge pipe (4) in the tank, a powder conveying pipeline (10), a Laval jet pump (15), a thermal cracking reactor (17), a steam pipe (18) and a conveying pipe;
a feed valve (3) used for being communicated with external powder conveying equipment, an air inlet valve (5) used for being communicated with compressed gas equipment, a pressure relief exhaust valve (6), a radar level gauge (8) used for detecting the level of powder in the powder tank (1) and a first pressure gauge (9) used for detecting the pressure in the powder tank (1) are arranged on the powder tank (1);
a discharge valve (7) is arranged on the in-tank discharge pipe (4), the in-tank discharge pipe (4) is connected with the powder tank (1), a feed pipe orifice of the in-tank discharge pipe (4) extends into the powder tank (1), and a discharge pipe orifice of the discharge pneumatic pipe (2) is connected; the discharging pneumatic tube (2) is connected with the inner wall of the powder tank (1);
a feeding pipe orifice of the powder conveying pipeline (10) is connected with a discharging pipe orifice of the discharging pipe (4) in the tank, and a discharging pipe orifice of the powder conveying pipeline (10) is connected with a feeding port of the Laval jet pump (15);
a feed port of the Laval jet pump (15) is provided with a jet pump feed control valve (14), and an air inlet pipe orifice of the Laval jet pump (15) is connected with an air outlet pipe orifice of a steam pipe (18) for conveying high-temperature steam;
the steam pipe (18) is sequentially provided with a cylinder-division steam pressure gauge (11), a cylinder-division steam thermometer (12) and a superheated steam control valve (13) along the steam flowing direction;
the feeding pipe mouth of the conveying pipe is connected with the discharging end of the Laval jet pump (15), a second pressure gauge (16) is arranged on the conveying pipe, and the discharging pipe mouth of the conveying pipe is connected with the feeding port of the thermal cracking reactor (17).
2. The jet pump system for mixing and conveying by vapor-powder collision as claimed in claim 1, wherein the Laval jet pump (15) comprises a vapor Laval ejector (101), a vapor-powder mixing collision suction chamber (102), a powder gas delivery suction pipe (103), an ejector throat (104) and an ejector diffuser pipe (105);
an air inlet port of the steam Laval ejector (101) is connected with an air outlet pipe port of the steam pipe (18), and an air outlet port of the steam Laval ejector (101) is connected with an air inlet port of the air suction chamber (102) for mixing and colliding steam powder;
the gas inlet port of the powder gas delivery and extraction pipe (103) is connected with the gas outlet pipe orifice of the powder conveying pipeline (10), and the gas outlet port of the powder gas delivery and extraction pipe (103) is connected with the gas-powder mixing collision gas inlet port of the gas suction chamber (102);
a feeding pipe orifice of the ejector throat pipe (104) is connected with a discharging port of the gas-powder mixing collision air suction chamber (102), and a discharging pipe orifice of the ejector throat pipe (104) is connected with a feeding pipe orifice of the ejector diffusion pipe (105); the outlet orifice of the injector diffusion pipe (105) is connected with the inlet orifice of the feed delivery pipe.
3. A jet pump system for impingement mixing delivery of a gas and powder as claimed in claim 2 wherein the ejector throat (104) has a decreasing internal diameter in the direction of flow of the material therein.
4. A jet pump system for impingement mixing delivery of a jet stream using steam and powder as claimed in claim 2, characterised in that the inner diameter of the injector diffuser (105) in the direction of flow of the material therein increases gradually.
5. A use method of a jet pump system for carrying out collision mixing conveying by utilizing steam and powder is characterized by comprising the following specific steps of:
s1, starting the feed valve (3), the pressure relief exhaust valve (6) and the radar level gauge (8) first, and closing the air inlet valve (5) and the discharge valve (7);
s2, introducing the powder into the powder tank (1) from the feed valve (3) by external powder conveying equipment until the level of the powder in the powder tank (1) detected by the radar level gauge (8) reaches a set value, and stopping feeding the powder into the powder tank (1);
s3, closing the feed valve (3) and the pressure relief exhaust valve (6) and starting the intake valve (5);
s4, introducing compressed gas into the powder tank (1) through the gas inlet valve (5) by using compressed gas equipment, and stopping introducing gas into the powder tank (1) until the first pressure gauge (9) detects that the gas pressure in the powder tank (1) reaches a set value;
s5, detecting whether the steam pressure and the steam temperature in the steam pipe (18) reach set values through the steam pressure gauge (11) and the steam thermometer (12) of the cylinder;
if yes, go to S6;
if not, continuing to monitor the steam in the steam pipe (18);
s6, starting a discharge valve (7), an overheated steam control valve (13) and a jet pump feeding control valve (14), enabling powder in a powder tank (1) to enter a Laval jet pump (15) along a discharge pneumatic pipe (2), a tank discharge pipe (4) and a powder conveying pipeline (10), enabling high-temperature steam to enter the Laval jet pump (15) from a steam pipe (18) to react with the powder, and conveying the high-temperature steam into a thermal cracking reactor (17) for cracking;
s7, when the radar level gauge (8) detects that the powder level in the powder tank (1) is reduced to a set value, closing the air inlet valve (5), the discharge valve (7), the superheated steam control valve (13) and the jet pump feeding control valve (14) simultaneously.
6. The use method of the jet pump system for mixing and conveying by vapor and powder colliding as claimed in claim 5, wherein the air pressure value detected by the first pressure gauge (9) in S4 is 0.4-0.6 MPa.
7. The use method of the jet pump system for mixing and conveying by vapor and powder colliding as claimed in claim 5, wherein the air pressure value detected by the steam pressure gauge (11) of the steam dividing cylinder in S5 is 0.4-0.6 MPa.
CN202110711575.4A 2021-06-25 2021-06-25 Jet pump system for carrying out mixed collision of steam and powder Pending CN113291818A (en)

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Application Number Priority Date Filing Date Title
CN202110711575.4A CN113291818A (en) 2021-06-25 2021-06-25 Jet pump system for carrying out mixed collision of steam and powder

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Application Number Priority Date Filing Date Title
CN202110711575.4A CN113291818A (en) 2021-06-25 2021-06-25 Jet pump system for carrying out mixed collision of steam and powder

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CN202110711575.4A Pending CN113291818A (en) 2021-06-25 2021-06-25 Jet pump system for carrying out mixed collision of steam and powder

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114082512A (en) * 2021-11-02 2022-02-25 龙佰禄丰钛业有限公司 Crushing auxiliary agent adding system in titanium dioxide production by chlorination process

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114082512A (en) * 2021-11-02 2022-02-25 龙佰禄丰钛业有限公司 Crushing auxiliary agent adding system in titanium dioxide production by chlorination process

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