CN109049344A - A kind of positive-negative pressure high-efficiency dry powder blending device - Google Patents
A kind of positive-negative pressure high-efficiency dry powder blending device Download PDFInfo
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- CN109049344A CN109049344A CN201810997717.6A CN201810997717A CN109049344A CN 109049344 A CN109049344 A CN 109049344A CN 201810997717 A CN201810997717 A CN 201810997717A CN 109049344 A CN109049344 A CN 109049344A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
- B28C7/06—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors
- B28C7/062—Supplying the solid ingredients, e.g. by means of endless conveyors or jigging conveyors with a pneumatic or hydraulic conveyor
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- Air Transport Of Granular Materials (AREA)
Abstract
The present invention provides a kind of positive-negative pressure high-efficiency dry powder blending devices, including raw material storage tanks, gravimetric tank, mixed tank, air blower, vacuum pump, air compressor machine, fluidisation pipeline, compressed-air line, production flow line and mutual defeated pipeline；Raw material storage tanks are connected by production flow line with gravimetric tank, vacuum pump is connected with gravimetric tank, air blower is connected by fluidisation pipeline with raw material storage tanks, air compressor machine is connected to the discharge port of raw material storage tanks by compressed-air line, the discharge port of the discharge port of gravimetric tank and mixed tank carries out that blowout is helped to expect, gravimetric tank is connected to mixed tank by mutual defeated pipeline, raw material is fluidized by air blower, air compressor machine positive pressure helps blowout to expect, vacuum pump negative pressure takes out material, so that the material in raw material storage tank is delivered in gravimetric tank, feedstock transportation concentration is high, distance is remote, and the problem of blocking pipeline will not occur, raw material mixing efficiency can be promoted.
Description
Technical field
Present document relates to pneumatic compression devices technology, espespecially a kind of positive-negative pressure high-efficiency dry powder blending device.
Background technique
Cement powder mixture (calling in the following text dry-mixed) is by material used in well cementing operation according to hole condition and corresponding well shaft fixing technology
It is required that being used in mixed way other materials in the cement base-material of prescribed level or the dry powder additive of different purposes being added, to obtain
The well cementation dry mash of high-quality.Main purpose is improved or reduces density, enhancing cement slurry high temperature resistant property etc., in land and sea
Using frequent in foreign well shaft fixing technology.
Traditional positive pressure conveying dry mixing process generates several granular materials under vaporized state using compressed air as power
Relative movement, several raw material are uniformly puddled using layer paving and tank switching technique, completion.Due to positive pressure conveying technology charging (feeding) equipment knot
Structure is complicated, and scene needs to inflate the characteristics such as transmission after usually needing manually or mechanically to lift material, charging, and operating efficiency is not high,
Dust pollution is serious and labour intensive.
Summary of the invention
At least one of in order to solve the above-mentioned technical problem, there is provided herein a kind of positive-negative pressure high-efficiency dry powder mixture dresses
It sets, structure is simple, operating efficiency is high.
Positive-negative pressure high-efficiency dry powder blending device provided in an embodiment of the present invention, including raw material storage tanks, gravimetric tank, mixture
Tank, air blower, vacuum pump, air compressor machine, fluidisation pipeline, compressed-air line, production flow line and mutual defeated pipeline；The raw material storage
Tank is connected by the production flow line with the gravimetric tank, and the vacuum pump is connected with the gravimetric tank, the air blower
It is connected by the fluidisation pipeline with the raw material storage tanks, the air compressor machine is connected to institute by the compressed-air line
The discharge port for stating the discharge port of raw material storage tanks, the discharge port of the gravimetric tank and the mixed tank carries out that blowout is helped to expect, described
Gravimetric tank is connected to the mixed tank by the mutually defeated pipeline.
Optionally, the positive-negative pressure high-efficiency dry powder blending device further include: dedusting recycling can；And blowdown line, connect institute
Dedusting recycling can and the raw material storage tanks are stated, the air compressor machine is also connected to the dedusting by the compressed-air line and returns
The discharge port of closed cans carries out that blowout is helped to expect, the air blower is also connected by the fluidisation pipeline with the dedusting recycling can,
The production flow line is also connected with the discharge port of the dedusting recycling can and the feed inlet of the gravimetric tank.
Optionally, the positive-negative pressure high-efficiency dry powder blending device further include: deduster, the vacuum pump pass through the dedusting
Device is connected with the gravimetric tank.
Optionally, the deduster is fiber bag precipitator.
Optionally, the positive-negative pressure high-efficiency dry powder blending device further include: holding vessel；With output of products pipeline, the storage
It deposits tank and described let out also is passed through by gravimetric tank described in the output of products piping connection and/or the mixed tank, the holding vessel
Pressure pipeline is connected with the dedusting recycling can.
Optionally, the positive-negative pressure high-efficiency dry powder blending device further include: external transport pipeline is connected to going out for the holding vessel
In material mouth, the air compressor machine, which also passes through the compressed-air line and is connected to the discharge port of the holding vessel, help blowout to expect.
Optionally, the positive-negative pressure high-efficiency dry powder blending device further include: raw material receives pipeline, is connected to the raw material and deposits
On the feed inlet of storage tank.
Optionally, the positive-negative pressure high-efficiency dry powder blending device further include: feeding device is connected with the gravimetric tank.
Optionally, the raw material storage tanks include one or both of fixed ash can and mobile ash can.
Optionally, the mutually defeated pipeline includes main line, the first looped pipeline road and the second looped pipeline road, the discharging of the gravimetric tank
Mouthful, discharge port, the one end on first looped pipeline road and the one end on second looped pipeline road of the mixed tank be both connected to it is described
On main line, the other end on first looped pipeline road is connected to the feed inlet of the gravimetric tank, second looped pipeline road it is another
End is connected to the feed inlet of the mixed tank.
Compared with prior art, positive-negative pressure high-efficiency dry powder blending device provided by the invention, raw material storage tanks pass through production
Pipeline is connected with gravimetric tank, and vacuum pump is connected with gravimetric tank, and air blower is connected by fluidisation pipeline with raw material storage tanks,
Air compressor machine is connected to the discharge port of the discharge port of raw material storage tanks, the discharge port of gravimetric tank and mixed tank by compressed-air line
It carries out that blowout is helped to expect, gravimetric tank is connected to mixed tank by mutual defeated pipeline, helps raw material fluidisation, air compressor machine positive pressure by air blower
Blowout material, vacuum pump negative pressure takes out material so that the material in raw material storage tank is delivered in gravimetric tank, feedstock transportation concentration is high, away from
From remote, and the problem of blocking pipeline will not occur, raw material mixing efficiency can be promoted.
The positive-negative pressure high-efficiency dry powder blending device, it is simple to take full advantage of negative pressure transportation short distance multiple spot feeding, structure, nothing
The characteristic of dust pollution.Using the gravimetric tank of resistance to positive/negative-pressure, mating fiber bag precipitator and vacuum pump lead in mixed operation
It crosses vacuum pump and generates vacuum environment in gravimetric tank, realize raw material multiple spot negative pressure transportation via production flow line and feeding device.It is logical
It crosses gravimetric tank high-precision weighing and controls each material content, since raw material storage tanks discharge port is located at bottom, cooperation negative pressure transportation is special
Point realizes pipeline noresidue, the charging of multicomponent mixture in the process without pipeline purging and pressurising transmission, substantially increases operation effect
Rate.
The other feature and advantage of this paper will illustrate in the following description, also, partly become from specification
It is clear that by implementing to understand herein.The purpose of this paper and other advantages can be by specifications, claims
And specifically noted structure is achieved and obtained in attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand this paper technical solution, and constitutes part of specification, with this Shen
Embodiment please is used to explain the technical solution of this paper together, does not constitute the limitation to this paper technical solution.
Fig. 1 is the structural schematic block diagram of positive-negative pressure high-efficiency dry powder blending device described in one embodiment of the invention；
Fig. 2 is the partial structurtes schematic block diagram in Fig. 1.
Fig. 3 is the schematic diagram of raw material two sides pressure in production flow line in Fig. 1.
Specific embodiment
For the purposes, technical schemes and advantages of this paper are more clearly understood, below in conjunction with attached drawing to the reality of this paper
Example is applied to be described in detail.It should be noted that in the absence of conflict, the spy in embodiment and embodiment in the application
Sign can mutual any combination.
Many details are explained in the following description in order to fully understand herein, still, can also be adopted herein
Implemented with other than the one described here mode, therefore, the protection scope of this paper is not by following public specific implementation
The limitation of example.
Positive-negative pressure high-efficiency dry powder blending device provided in an embodiment of the present invention, as depicted in figs. 1 and 2, including raw material storage
Tank 1, gravimetric tank 9, mixed tank 11, air blower 15, vacuum pump 10, air compressor machine 14, fluidisation pipeline 5, compressed-air line 6, production
Pipeline 8 and mutual defeated pipeline 19；Raw material storage tanks 1 are connected by production flow line 8 with gravimetric tank 9, vacuum pump 10 and 9 phase of gravimetric tank
Connection carries out negative pressure and takes out material, and air blower 15 is connected by fluidizing pipeline 5 with raw material storage tanks 1, by fluidizing 5 phase raw material of pipeline
Air blast in holding vessel 1 blows afloat the raw material in raw material storage tanks 1, is sufficiently mixed raw material with the air in raw material storage tanks 1, shape
Raw material blocking pipeline is prevented with preferably transferring raw material at fluidized state, air compressor machine 14 is connected to by compressed-air line 6
The discharge port of the discharge port of raw material storage tanks 1, the discharge port of gravimetric tank 9 and mixed tank 11 carries out that blowout is helped to expect, vacuum pump 10, drum
Blower 15 and 14 three of air compressor machine are used cooperatively, it is ensured that the raw material high concentration in pipeline, long-distance sand transport, gravimetric tank 9 and mixture
Tank 11 is connected to by mutually defeated pipeline 19.
The positive-negative pressure high-efficiency dry powder blending device, raw material storage tanks 1 are connected by production flow line 8 with gravimetric tank 9, very
Sky pump 10 is connected with gravimetric tank 9, and air blower 15 is connected by fluidizing pipeline 5 with raw material storage tanks 1, and air compressor machine 14 passes through pressure
The discharge port that contracting air line 6 is connected to the discharge port of raw material storage tanks 1, the discharge port of gravimetric tank 9 and mixed tank 11 is helped
Blowout material, gravimetric tank 9 and mixed tank 11 pass through mutual defeated pipeline 19 and are connected to, raw material is fluidized by air blower 15, air compressor machine 14 just
Pressure helps blowout to expect, 10 negative pressure of vacuum pump takes out material, so that the material in raw material storage tank is delivered in gravimetric tank 9, feedstock transportation is dense
The problem of spending high, distance far, and blocking pipeline will not occur, can promote raw material mixing efficiency.
Wherein, mutually defeated pipeline 19 includes main line, the first looped pipeline road and the second looped pipeline road, and the discharge port of gravimetric tank 9 mixes
One end of the discharge port of distribution tank 11, the one end on the first looped pipeline road and the second looped pipeline road is both connected on main line, the first looped pipeline road
The other end be connected to the feed inlet of gravimetric tank 9, the other end on the second looped pipeline road is connected to the feed inlet of mixed tank 11.Pass through control
Each valve is made, when gravimetric tank 9 conveys mixture to mixed tank 11, is conveyed by positive pressure；It is defeated to gravimetric tank 9 in mixed tank 11
When sending mixture, pass through positive pressure conveying, negative-pressure ward；It back and forth carries out realizing that mixture is sufficiently mixed.Each raw material storage tanks 1
Interior raw material is successively conveyed into gravimetric tank 9, and gravimetric tank 9 weighs to every kind of material according to its requirement respectively, is claimed at this time
Material in weight tank 9 is spread by type lamination layer.
Furthermore positive-negative pressure high-efficiency dry powder blending device further include: dedusting recycling can 2；With blowdown line 3, connects dedusting and return
Closed cans 2 and raw material storage tanks 1, air compressor machine 14 are also helped by the discharge port that compressed-air line 6 is connected to dedusting recycling can 2
Blowout material, air blower 15 are also connected by fluidizing pipeline 5 with dedusting recycling can 2, and production flow line 8 is also connected with dedusting recycling can 2
Discharge port and gravimetric tank 9 feed inlet, the dust of raw material is collected.
Further, positive-negative pressure high-efficiency dry powder blending device further include: deduster, vacuum pump 10 pass through deduster and weighing
Tank 9 is connected, and prevents from draining into the raw material of extraction in vacuum and pollutes environment in outside air.Deduster can be cloth bag
Formula deduster 20.
In addition, positive-negative pressure high-efficiency dry powder blending device further include: holding vessel 12；With output of products pipeline 17, holding vessel 12
Gravimetric tank 9 is connected by output of products pipeline 17 and/or mixed tank 11, holding vessel 12 are also recycled by blowdown line 3 and dedusting
Tank 2 is connected, and when conveying mixture into holding vessel 12, dedusting recycling can 2 collects the dust flown upward.
Positive-negative pressure high-efficiency dry powder blending device further include: external transport pipeline 13 is connected on the discharge port of holding vessel 12, pneumatics
Machine 14 also carries out that blowout is helped to expect by the discharge port that compressed-air line 6 is connected to holding vessel 12.Positive-negative pressure high-efficiency dry powder mixture
Device further include: raw material receives pipeline 7, is connected on the feed inlet of raw material storage tank.Can by truck 4, material ship 21 etc. into
Row splicing or feeding.
Positive-negative pressure high-efficiency dry powder blending device further include: feeding device 18 is connected with gravimetric tank 9, is used for gravimetric tank 9
Interior charging.
Preferably, raw material storage tanks 1 are fixed ash can.Positive-negative pressure high-efficiency dry powder blending device is further equipped with mobile ash
Tank etc., can be achieved the purpose of the application, and objective is not being repeated again, should belong to without departing from design philosophy of the invention
In the protection scope of the application.
To shorten pipeline equivalent length in Design of Pneumatic Conveying Device as far as possible, and pass through caliber, discharge pressure, help and blow design
Etc. type selectings convey material in the case where being suspended into density stream mode as far as possible.Since dry powder blending device needs to cope with different densities and grain
The material of diameter, and the floating velocity of material steeply rises with density and partial size rising；It is contemplated that maximal density and partial size
The suspension conveying of material (such as Iron Ore Powder) will greatly increase the construction cost of device.But guarantee the material of maximal density and partial size
Transportable property (not blocking) be basic demand.
The positive-negative pressure high-efficiency blending device rectifies pressure conveying, the dual mode of rewinding end negative-pressure ward using material issuance；Such as
Shown in Fig. 3, which increases the pressure difference at rewinding end and material issuance end, make material in the duct simultaneously by positive pressure send power P and
Negative-pressure ward power Pv effect, in the case where not increasing system pressure, can effectively extend suspension segment length.In plug flow section, bear
The stifled effect that disappears of pressure can avoid job interruption caused by line clogging.
In positive pressure system, the floating velocity of dry powder particle is by material density, particle diameter and the viscous system of air force
The influence of the parameters such as number:
In formula:
Wm--- floating velocity, m/s
Coefficient of dynamic viscosity=1.845 of η --- air × 10-5, kgs/m2
ρm--- the density (γ m/g) of material, kgs2/m4
The density (20 DEG C, an atmospheric pressure under) of ρ --- air, 0.121kgs2/m4
G --- acceleration of gravity, 9.81, m/s2
Z --- particle diameter, m
The calculating of several common dry powder materials see the table below:
| Density g/cm3 | Partial size μm | Floating velocity m/s | |
| Micro- silicon | 2.49 | 0.5 | It is not applicable |
| Iron Ore Powder | 5 | 2 | It is not applicable |
| H class g cement | 3.15 | 40 | 1.2 |
| Silica sand 200 | 2.6 | 75 | 3.4 |
| Silica sand 100 | 2.6 | 150 | 11.6 |
From upper meter count according to it can be seen that, relative to absolute density change, the floating velocity of dry powder material is to particle diameter
Variation it is more sensitive, for partial size is less than 80 μm of minute materials, Wm is only a few percent or smaller of conveying speed, can
Not consider；But it is greater than the material of 150um for partial size, floating velocity is substantially increased with partial size, will lead to conveying effect
The sharply decline of rate；Should especially it pay attention in technological design and Efficiency.
Device design gas gray scale is another important parameter, and gas gray scale value is certainly in the physical property of material, mode of movement and defeated
Send condition etc..Gas gray scale is bigger, and conveying device efficiency is higher, and internal diameter of delivery hose is smaller, and investment reduces, smaller by gas flow,
Energy consumption is also few.But gas gray scale is excessive, and conveying can be made uneven, generate line clogging, so that reducing the reliable of device work
Property.Generally when conveying device selectes one timing of transport condition, gas gray scale also can accordingly be stablized, the equivalent length of it and conveyance conduit
It is inversely proportional, (several Parameter design and computations of floated high pressure Pneumatic conveyer) can be calculated by following equation:
Wherein:
Q=s × vm×60
In formula:
μ --- gas gray scale, kg/kg
G --- transfer efficiency takes design value 90Ton/hour
Q --- specific air consumption, m3/min
R --- normal air severe, 1.2kg/m3
S --- pipeline section product, m2
vm--- air pipeline end speed, according to measuring and calculating, taking 15m/s, (general control is in 25m/s or less)
It is calculated according to 5 inches of seamless steel pipes:
Device air consumption is about 9.64m3/min；Gas gray scale 129.6kg/kg, belongs to according to two-phase transportation；Dry powder cement by
It is all smaller in average grain diameter and loose bulk density, dense-phase flow smoothly can be transitioned into from dilute suspension flowing move state.Gas
In tolerance band (30~200kg/kg), check passes through for gray scale design.
According to the construction experience that current marine drilling bulk cement storage tank rated pressure configures, device transmission pressure selected 30~
35psi；Tank designs pressure selectes 45Psi.
It is as follows that device designs caliber check:
Manifold diameter design is checked according to the following formula according to material volume weight, air mass flow:
In formula:
D --- conveying material pipe diameter, m
Q --- air mass flow, kg/s
Qm--- material conveying capacity, kg/s
R --- normal air severe, 1.2kg/m3
rm--- material volume weight, kg/m3
W --- air velocity, according to 15m/s
wm--- material flow, according to 12m/s
It is calculated according to the maximum cement of dry-mixed components accounting, caliber D is 4.74 inches, and system selects 5 inches of seamless steels
Pipe.
Manufactured positive-negative pressure high-efficiency dry powder blending device takes full advantage of negative pressure transportation short distance multiple spot feeding, structure letter
It is single, the characteristic of without dust pollution.Using the gravimetric tank of resistance to positive/negative-pressure, mating fiber bag precipitator and vacuum pump, in mixed operation
In, vacuum environment is generated in gravimetric tank by vacuum pump, realizes that raw material multiple spot negative pressure is defeated via production flow line and feeding device
It send.Each material content is controlled by gravimetric tank high-precision weighing, since raw material storage tanks discharge port is located at bottom, cooperation negative pressure is defeated
Feature is sent, realizes pipeline noresidue, the charging of multicomponent mixture without pipeline purging and pressurising transmission, substantially increases operation in the process
Efficiency.
In description herein, term " installation ", " connected ", " connection ", " fixation " etc. be shall be understood in a broad sense, for example,
" connection " may be fixed connection or may be dismantle connection, or integral connection；It can be directly connected, can also lead to
Intermediary is crossed to be indirectly connected.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning herein.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of this paper
In example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example.
Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more of the embodiments or examples with suitable
Mode combine.
Although embodiment disclosed herein is as above, the content only implementation of use herein for ease of understanding
Mode is not limited to herein.Technical staff in any this paper fields, do not depart from spirit disclosed herein and
Under the premise of range, any modification and variation, but the patent protection model of this paper can be carried out in the form and details of implementation
It encloses, still should be subject to the scope of the claims as defined in the appended claims.
Claims (10)
1. a kind of positive-negative pressure high-efficiency dry powder blending device, which is characterized in that including raw material storage tanks, gravimetric tank, mixed tank, air blast
Machine, vacuum pump, air compressor machine, fluidisation pipeline, compressed-air line, production flow line and mutual defeated pipeline；The raw material storage tanks pass through
The production flow line is connected with the gravimetric tank, and the vacuum pump is connected with the gravimetric tank, and the air blower passes through institute
It states fluidisation pipeline to be connected with the raw material storage tanks, the air compressor machine is connected to the raw material by the compressed-air line
The discharge port of the discharge port of holding vessel, the discharge port of the gravimetric tank and the mixed tank carries out that blowout is helped to expect, the gravimetric tank
It is connected to the mixed tank by the mutually defeated pipeline.
2. positive-negative pressure high-efficiency dry powder blending device according to claim 1, which is characterized in that further include:
Dedusting recycling can；With
Blowdown line, connects the dedusting recycling can and the raw material storage tanks, and the air compressor machine also passes through the compressed air
The discharge port that pipeline is connected to the dedusting recycling can carries out that blowout is helped to expect, the air blower also passes through the fluidisation pipeline and institute
It states dedusting recycling can be connected, the production flow line is also connected with the charging of the discharge port and the gravimetric tank of the dedusting recycling can
Mouthful.
3. positive-negative pressure high-efficiency dry powder blending device according to claim 1, which is characterized in that further include:
Deduster, the vacuum pump are connected by the deduster with the gravimetric tank.
4. positive-negative pressure high-efficiency dry powder blending device according to claim 3, which is characterized in that the deduster is cloth-bag type
Deduster.
5. positive-negative pressure high-efficiency dry powder blending device according to claim 2, which is characterized in that further include:
Holding vessel；With
Output of products pipeline, the holding vessel by gravimetric tank described in the output of products piping connection and/or the mixed tank,
The holding vessel is also connected by the blowdown line with the dedusting recycling can.
6. positive-negative pressure high-efficiency dry powder blending device according to claim 5, which is characterized in that further include:
External transport pipeline is connected on the discharge port of the holding vessel, and the air compressor machine also passes through the compressed-air line and connects
Discharge port to the holding vessel carries out that blowout is helped to expect.
7. positive-negative pressure high-efficiency dry powder blending device according to claim 1, which is characterized in that further include:
Raw material receives pipeline, is connected on the feed inlet of the raw material storage tank.
8. positive-negative pressure high-efficiency dry powder blending device according to claim 1, which is characterized in that further include:
Feeding device is connected with the gravimetric tank.
9. positive-negative pressure high-efficiency dry powder blending device according to claim 1, which is characterized in that the raw material storage tanks include
One or both of fixed ash can and mobile ash can.
10. positive-negative pressure high-efficiency dry powder blending device according to claim 1, which is characterized in that it is described mutually defeated pipeline include
Main line, the first looped pipeline road and the second looped pipeline road, the discharge port of the gravimetric tank, the discharge port of the mixed tank, described first
The one end on the one end on looped pipeline road and second looped pipeline road is both connected on the main line, the other end on first looped pipeline road
It is connected to the feed inlet of the gravimetric tank, the other end on second looped pipeline road is connected to the feed inlet of the mixed tank.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112157817A (en) * | 2020-06-05 | 2021-01-01 | 新蔚来智能科技(山东)有限公司 | Assembly type building prefabricated component production line foaming concrete blending system |
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| CN112157817A (en) * | 2020-06-05 | 2021-01-01 | 新蔚来智能科技(山东)有限公司 | Assembly type building prefabricated component production line foaming concrete blending system |
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Application publication date: 20181221 |
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| RJ01 | Rejection of invention patent application after publication |