CN107441747A - A kind of vacuum spray dehydrator group and method - Google Patents

A kind of vacuum spray dehydrator group and method Download PDF

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Publication number
CN107441747A
CN107441747A CN201710888399.5A CN201710888399A CN107441747A CN 107441747 A CN107441747 A CN 107441747A CN 201710888399 A CN201710888399 A CN 201710888399A CN 107441747 A CN107441747 A CN 107441747A
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CN
China
Prior art keywords
drying
feed
vacuum spray
liquid
feed liquid
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Pending
Application number
CN201710888399.5A
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Chinese (zh)
Inventor
顾建东
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顾建东
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Application filed by 顾建东 filed Critical 顾建东
Priority to CN201710888399.5A priority Critical patent/CN107441747A/en
Publication of CN107441747A publication Critical patent/CN107441747A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/0011Heating features
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/16Evaporating by spraying
    • B01D1/18Evaporating by spraying to obtain dry solids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/30Accessories for evaporators ; Constructional details thereof

Abstract

The invention provides a kind of vacuum spray dehydrator group and method, belong to technical field of chemical.Vacuum spray dehydrator group includes drying tower, feed pipe, feed pump, heater and vavuum pump.Vacuum spray drying method uses carries out exterior conductive heating to the feed liquid in charging line, and separation is dried in the drying chamber that the feed liquid after heating enters under vacuum environment after atomization.By by existing open type constant pressure and dry form, being changed to carry out exterior conductive heating to feed liquid, and feed liquid is under vacuum environment and is dried and evaporates, under vacuum negative pressure condition, the boiling point of liquid reduces, therefore, feed liquid under low-temperature condition also can evaporation solvent, so as to effectively reducing energy consumption.Further, since feed liquid is in the drying process, unused gas is heated, and therefore, the waste gas that drying process is discharged is greatly reduced, and thermal loss reduces, and energy consumption is lower, effectively save production cost, and the pollution to environment is smaller.

Description

A kind of vacuum spray dehydrator group and method
Technical field
The present invention relates to technical field of chemical, in particular to a kind of vacuum spray dehydrator group and method.
Background technology
In chemical field, often feed liquid is dried powdering using chemical industry equipment, wherein feed liquid can be solution, Emulsion, suspension or pasty liquid etc..Existing feed liquid drying means energy consumption is higher, wastes the energy and causes processing cost higher.
The content of the invention
It is an object of the invention to provide a kind of vacuum spray dehydrator group, feed liquid is set to heat and do under vacuum conditions It is dry, effectively reduce energy consumption, save the energy, reduce production cost.
The present invention also aims to provide a kind of vacuum spray drying method, feed liquid is set to heat and do under vacuum conditions It is dry, effectively reduce energy consumption, save the energy, reduce production cost.
What the present invention was realized in:
The embodiments of the invention provide a kind of vacuum spray dehydrator group, the vacuum spray dehydrator group includes drying Tower, feed pipe, feed pump, heater and vavuum pump, drying chamber of the drying tower with closing, the one of the feed pipe Hold and connected for the material liquid tank with holding feed liquid, the other end of the feed pipe, which is connected and is provided with the drying chamber, to be used for The atomizer being atomized to feed liquid, the bottom of the drying tower are provided with the first outlet valve, and the feed pump is arranged at institute State on feed pipe and for the feed liquid in material liquid tank to be delivered in the drying chamber through the feed pipe, the heater It is arranged at the outside of the feed pipe and for carrying out conduction heating, the vavuum pump to the feed liquid inside the feed pipe Connected with the drying chamber and for being vacuumized to the drying chamber.
As the alternative of above-described embodiment, the vacuum spray dehydrator group also includes separating mechanism, the separation Mechanism includes cyclone separator or cloth bag separator, is connected between the drying chamber and the vavuum pump by the separating mechanism It is logical.
As the alternative of above-described embodiment, the vacuum spray dehydrator group also includes solvent recovery component, described Solvent recovery component includes filter, condenser and the surge tank being sequentially communicated, and the filter is located at the upper of the condenser Trip, the surge tank are located at the downstream of the condenser, pass through the solvent recovery between the drying chamber and the vavuum pump Component connects.
As the alternative of above-described embodiment, the surge tank has inlet and outlet, and the height of the import is more than The height of the outlet.
As the alternative of above-described embodiment, the vacuum spray dehydrator group also includes rotary wash ball, the rotation Turn the inside that rotating wash bowl is rotatably arranged at the drying tower, the rotary wash ball is driven by high-pressure pump.
As the alternative of above-described embodiment, the vacuum in the drying tower is -0.04~-0.1MPa.
As the alternative of above-described embodiment, the heater is heating pipe, and the heating pipe is sheathed on described The outside of feed pipe, formed between the heating pipe and the feed pipe for for adding the heating of hot liquid flow to lead to Road, the heating pipe have the inlet and liquid outlet connected with the heating passage.
As the alternative of above-described embodiment, the atomizer is located at the center of top of the drying tower.
The embodiment of the present invention additionally provides a kind of vacuum spray drying method, and the vacuum spray drying method includes:It is logical Cross feed pump the feed liquid in material liquid tank is delivered in charging line, and exterior conductive is carried out to the feed liquid in the charging line Heating;Feed liquid after heating is atomized and entered in the drying chamber of drying tower by atomizer, wherein, the drying chamber is in true Altitude.
As the alternative of above-described embodiment, the vacuum spray drying method also includes:Feed liquid is in the drying chamber The moisture separated after interior drying, which enters, carries out secondary separation in separating mechanism, wherein, separating mechanism is cyclone separator or cloth bag Separator;The solvent separated after redrying, which enters in filter, to be filtered, and is then condensed by condenser and is entered surge tank It is interior.
Compared with prior art, the beneficial effects of the invention are as follows:
Vacuum spray dehydrator group provided in an embodiment of the present invention include drying tower, feed pipe, feed pump, heater and Vavuum pump, drying tower have the drying chamber of closing, and drying chamber forms vacuum environment in the presence of vavuum pump, and feed pump is used for will Feed liquid in material liquid tank is delivered in drying chamber through feed pipe, and heater is used to conduct the feed liquid inside feed pipe Heating.Vacuum spray drying method provided in an embodiment of the present invention uses to be added to the feed liquid progress exterior conductive in charging line Heat, separation is dried in the drying chamber that feed liquid after heating enters under vacuum environment after atomization.
By by existing open type constant pressure and dry form, being changed to carry out exterior conductive heating to feed liquid, and feed liquid is in It is dried and evaporates under vacuum environment, under vacuum negative pressure condition, the boiling point of liquid reduces, and therefore, feed liquid is under low-temperature condition Also can evaporation solvent, so as to effectively reducing energy consumption.Further, since feed liquid is in the drying process, unused gas is heated, Therefore, the waste gas that drying process is discharged is greatly reduced, and thermal loss reduces, and energy consumption is lower, effectively save production cost, right The pollution of environment is smaller.
Brief description of the drawings
Fig. 1 is the structural representation for the vacuum spray dehydrator group that prior art provides;
Fig. 2 is the structural representation for the vacuum spray dehydrator group that the embodiment of the present invention 1 provides;
Fig. 3 is the structural representation for the vacuum spray dehydrator group that the embodiment of the present invention 2 provides;
Fig. 4 is the structural representation of Fig. 3 solvent recovery component.
Icon:100- vacuum spray dehydrator groups;101- material liquid tanks;102- drying towers;103- feed pipes;104- is fed Pump;105- heaters;106- vavuum pumps;107- atomizers;The outlet valves of 108- first;109- separating mechanisms;110- solvents return Receive component;111- filters;112- condensers;113- surge tanks;The outlet valves of 114- second;The outlet valves of 115- the 3rd;116- revolves Turn rotating wash bowl.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Therefore, below the detailed description of the embodiments of the invention to providing in the accompanying drawings be not intended to limit it is claimed The scope of the present invention, but be merely representative of the present invention selected embodiment.It is common based on the embodiment in the present invention, this area The every other embodiment that technical staff is obtained under the premise of creative work is not made, belong to the model that the present invention protects Enclose.
It should be noted that:Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing.
In the description of the invention, it is necessary to which explanation, term " first ", " second ", " the 3rd " etc. are only used for differentiation and retouched State, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is also necessary to explanation, unless otherwise clearly defined and limited, term " setting ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected;Can be It is joined directly together, can also be indirectly connected by intermediary, can is the connection of two element internals." connection " can be direct Connection, for the ordinary skill in the art, can also be understood by intermediary indirect communication with concrete condition The concrete meaning of above-mentioned term in the present invention.
Dryer group of the prior art is as shown in figure 1, drying steps are:Air is by heating, into drier top Air distributor, hot-air is evenly into hothouse.Atomizer of the feed liquid through tower top is atomized the liquid pearl that nebulizes, with hot-air simultaneously Stream contact, is dried to powder or particle in a short time.Finished product is discharged by drying tower bottom or whirlwind, and waste gas is emptied by blower fan.
Applicant has found that the one of key factor for causing feed liquid energy consumption for drying higher is the material dried under study for action Liquid is carried out under open type normal pressure, so feed liquid will reach the state for being dried to powder or particle, delivery temperature just needs to reach To higher numerical value, and then make it that dry wasted energy consumption is higher.
Fig. 1 is the structural representation for the vacuum spray dehydrator group that prior art provides;Fig. 2 is that the embodiment of the present invention 1 carries The structural representation of the vacuum spray dehydrator group of confession;Fig. 3 is the knot for the vacuum spray dehydrator group that the embodiment of the present invention 2 provides Structure schematic diagram;Fig. 4 is the structural representation of Fig. 3 solvent recovery component.
Embodiment 1:
It refer to shown in Fig. 2, the embodiment of the present invention 1 provides a kind of vacuum spray dehydrator group 100, and the vacuum spraying is done Dry unit 100 is used to feed liquid be dried.
Wherein, feed liquid can be solution, emulsion, suspension or liquid/paste etc., feed liquid be held by material liquid tank 101, it is necessary to It is noted that material liquid tank 101 can be the part of vacuum spray dehydrator group 100, can also be done independently of vacuum spraying Dry unit 100.
Feed liquid can form the solids such as powdery, graininess after drying.
The concrete structure of above-mentioned vacuum spray dehydrator group 100 is:
Vacuum spray dehydrator group 100 includes drying tower 102, feed pipe 103, feed pump 104, heater 105 and true Empty pump 106.
Structure, the shape of drying tower 102 are unlimited, such as can use cylindric, rectangle tubbiness or irregular shape etc..
In the present embodiment, the center section of drying tower 102 is cylindric, bottom is coniform.
The inside of drying tower 102 has drying chamber, and drying chamber seals, wherein, sealing is comparatively, to refer to drying chamber Isolate with external environment, but be not positive confinement, do not exchanged with the extraneous gas etc. that carries out.
Drying chamber is used to make the feed liquid after heating and atomization fully be evaporated, so that feed liquid is divided into solid and evaporation Moisture, wherein, in the moisture of evaporation, a part can be included not by dry material.
Feed liquid in material liquid tank 101 is delivered in drying chamber via feed pipe 103, conveys the power of feed liquid by feed pump 104 provide.
Feed pipe 103 is tubulose, and one end of feed pipe 103 is stretched into material liquid tank 101 and connected with material liquid tank 101, The other end of feed pipe 103 is stretched into drying chamber and connected with drying chamber.
Feed pump 104 is arranged on feed pipe 103, and can be pumped the feed liquid in material liquid tank 101 to drying chamber, Feed pump 104 can be high-pressure pump or the pump of other forms.
It is provided with atomizer 107 in the one end of feed pipe 103 in drying chamber, atomizer 107 is used for pair Feed liquid in feed pipe 103 is atomized, and the feed liquid after atomization can enter in drying chamber.
The position of atomizer 107 can be set as needed, for example, atomizer 107 is in the top of drying chamber The positions such as portion, middle part, the first half, in the present embodiment, atomizer 107 are located at the center of top of drying tower 102.So set Put, can enable material that separation is fully dried in drying chamber, drying effect is more preferably.
Discharging opening is provided with the bottom of drying tower 102, discharge outlet is provided with the first outlet valve 108, the first outlet valve 108 opening and closing for controlling discharging opening.
The powder or particle that feed liquid is formed after being dried fall to discharge outlet under gravity, open the first discharging Valve 108, switch or stir to hold together to be sent by double butterfly valves.
Heater 105 is arranged at the outside of feed pipe 103, and the effect of heater 105 is to the inside of feed pipe 103 Feed liquid carries out conduction heating.
The temperature that heater 105 heats is selected as needed, and the temperature of heating can not make feed liquid go bad.In feed liquid not On the premise of going bad, if the temperature that feed liquid can bear is higher, the temperature of heating can be properly increased, if feed liquid can bear Temperature it is relatively low, then need the appropriate temperature for reducing heating.
Wherein, conduction heating refers to that heater 105 distributes heat and by the tube wall of feed pipe 103 by heat heat transfer Feed liquid to feed pipe 103, so that feed temperature raises, reach the purpose of heating, in this process, feed pipe Feed liquid in 103 does not contact with outside air.
The form of heater 105 is unlimited, such as can use water heating, oily heating, electrical heating etc., as long as biography can be realized Lead heating.
Vacuum environment in vacuum spray dehydrator group 100 is provided by vavuum pump 106, and vavuum pump 106 connects with drying chamber. When vavuum pump 106 works, the air in drying chamber is extracted out, makes to form negative-pressure vacuum environment in drying chamber.
Vacuum in drying chamber is selected as needed.
By by existing open type constant pressure and dry form, being changed to carry out exterior conductive heating to feed liquid, and feed liquid is in It is dried and evaporates under vacuum environment, under vacuum negative pressure condition, the boiling point of liquid reduces, and therefore, feed liquid is under low-temperature condition Also can evaporation solvent, so as to effectively reducing energy consumption.Further, since feed liquid is in the drying process, unused gas is heated, Therefore, the waste gas that drying process is discharged is greatly reduced, and thermal loss reduces, and energy consumption is lower, effectively save production cost, right The pollution of environment is smaller.
Embodiment 2:
It refer to shown in Fig. 3, Fig. 4, the embodiment of the present invention 2 provides a kind of vacuum spray dehydrator group 100, embodiment 2 It is the further improvement done on the basis of embodiment 1, the difference of embodiment 2 and embodiment 1 is:
The vacuum spray dehydrator group 100 that the present embodiment 2 provides also includes separating mechanism 109 and solvent recovery component 110, Wherein, separating mechanism 109 and solvent recovery component 110 can exist jointly, can also individualism, therebetween without inevitable Relation.
In the present embodiment 2, separating mechanism 109 and solvent recovery component 110 exist simultaneously.
Separating mechanism 109 includes cyclone separator or cloth bag separator, and separating mechanism 109 connects with drying chamber, seperator The bottom of structure 109 is provided with the second outlet valve 114.
Separating mechanism 109 is used to further separate the moisture comprising partial material discharged from drying chamber, whirlwind Separator and cloth bag separator can use prior art, will not be repeated here.
The moisture evaporated out of drying chamber can enter in separating mechanism 109 from the top of drying tower 102, certainly, from dry The other positions such as the middle part of dry tower 102 are also possible.
Solvent recovery component 110 includes filter 111, condenser 112 and surge tank 113.
Wherein, filter 111, condenser 112 and surge tank 113 are sequentially communicated, and filter 111 is located at condenser 112 Upstream, surge tank 113 are located at the downstream of condenser 112.
Upstream and downstream is defined according to the direction of motion of material.
Filter 111, condenser 112 and surge tank 113 can use prior art, will not be repeated here.Filter 111 bottom is provided with the 3rd outlet valve 115.
As the alternative of above-described embodiment, surge tank 113 has inlet and outlet, and the height of import is more than outlet Highly.
The inlet and outlet height of surge tank 113 is selected according to different demands, in the present embodiment, the height of import Degree is more than the height exported primarily to preventing from flowing backwards.
During for other purposes such as sedimentations, the height of import is less than the height of outlet or the height of import is equal to the height of outlet Spend also possible.
Surge tank 113 connects with vavuum pump 106, and vavuum pump 106 is right by separating mechanism 109 and solvent recovery component 110 Drying chamber is vacuumized.
Vacuum spray dehydrator group 100 can also include rotary wash ball 116, and rotary wash ball 116 is rotatably set In the inside of drying tower 102, rotary wash ball 116 is driven by high-pressure pump.Rotary wash ball 116 can be arranged as required to dry The optional position of the dry inner surface of tower 102, ideal position are the tops of the inner surface of drying tower 102.
During high pressure pump work, rotary wash ball 116 is driven to rotate, the cleaning fluid that rotary wash ball 116 is thrown away will can be done The inner surface of dry tower 102 cleans up.
In the present embodiment, the vacuum in drying tower 102 is -0.04~-0.1MPa, for example, can be -0.04Mpa, - 0.06Mpa, -0.08Mpa, -0.095Mpa etc.."-" represents negative pressure, and under the vacuum, energy consumption is lower.
In the present embodiment, heater 105 is specially using the form of liquid heating:
Heater 105 is heating pipe, and heating pipe is sheathed on the outside of feed pipe 103, heating pipe and feed pipe Formed between road 103 for the heating passage for adding hot liquid flow, heating pipe has the inlet connected with heating passage And liquid outlet.
The present invention changes the form of original open type constant pressure and dry, uses instead and dries under vacuum conditions, because open type is normal It is to mix the hot-air after heating with feed liquid again to press dry dry, and vacuum spraying is directly to heat feed liquid, and because vacuum is born Under pressure condition liquid boiling point reduce, be allowed to feed liquid under low-temperature condition also can evaporation solvent, thus vacuum spraying than open type spray Mist more saves energy consumption.
Feed liquid is dried under vacuum compared with the spray drying of open type, the waste gas being discharged is many less, thus vacuum is sprayed Mist is sprayed more environmentally-friendly than open type.
Because the waste gas that dry feed liquid is discharged under vacuum is few, it is achieved that spray drying solvent of the solvent recovery than open type Recovery is more prone to.
Cleaning fluid is pipelined to the rotary wash ball in drying tower 102 by feed liquid by high-pressure pump after the completion of drying 116, the cleaning fluid that rotary wash ball 116 is thrown away automatically cleans up drying tower 102.
The NM part of the present embodiment, is referred to embodiment 1 and prior art, will not be repeated here.
Embodiment 3
Corresponding, the embodiment of the present invention 3 provides a kind of vacuum spray drying method, and this method comprises the following steps:
The feed liquid in material liquid tank 101 is delivered in charging line by feed pump 104, and to the feed liquid in charging line Carry out exterior conductive heating;
Feed liquid after heating is atomized and entered in the drying chamber of drying tower 102 by atomizer 107, wherein, drying chamber In vacuum environment;
The moisture that feed liquid separates after being dried in drying chamber, which enters, carries out secondary separation in separating mechanism 109, wherein, separation Mechanism 109 is cyclone separator or cloth bag separator;
The solvent separated after redrying, which enters in filter 111, to be filtered, and is then condensed and is entered by condenser 112 In surge tank 113.
After feed liquid is dried, cleaning step can also be carried out, accordingly, starts high-pressure pump, revolves rotary wash ball 116 Turn, the cleaning fluid that rotary wash ball 116 is thrown away cleans to the inner surface of drying tower 102.
It should be noted that in the case where not conflicting, the feature in embodiment in the present invention can be combined with each other.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies Change, equivalent substitution, improvement etc., should be included in the scope of the protection.

Claims (10)

1. a kind of vacuum spray dehydrator group, it is characterised in that the vacuum spray dehydrator group includes drying tower, feed pipe Road, feed pump, heater and vavuum pump, the drying tower have a drying chamber of closing, one end of the feed pipe be used for The material liquid tank connection of feed liquid is held, the other end of the feed pipe is connected with the drying chamber and is provided with for entering to feed liquid The atomizer of row atomization, the bottom of the drying tower are provided with the first outlet valve, and the feed pump is arranged at the feed pipe On road and for the feed liquid in material liquid tank to be delivered in the drying chamber through the feed pipe, the heater is arranged at institute State the outside of feed pipe and for carrying out conduction heating to the feed liquid inside the feed pipe, the vavuum pump is done with described Dry chamber connects and for being vacuumized to the drying chamber.
2. vacuum spray dehydrator group according to claim 1, it is characterised in that the vacuum spray dehydrator group is also wrapped Separating mechanism is included, the separating mechanism includes cyclone separator or cloth bag separator, between the drying chamber and the vavuum pump Connected by the separating mechanism.
3. vacuum spray dehydrator group according to claim 1, it is characterised in that the vacuum spray dehydrator group is also wrapped Solvent recovery component is included, the solvent recovery component includes filter, condenser and the surge tank being sequentially communicated, the filter Be located at the downstream of the condenser positioned at the upstream of the condenser, the surge tank, the drying chamber and the vavuum pump it Between pass through the solvent recovery component connect.
4. vacuum spray dehydrator group according to claim 3, it is characterised in that the surge tank has import and gone out Mouthful, the height of the import is more than the height of the outlet.
5. vacuum spray dehydrator group according to claim 1, it is characterised in that the vacuum spray dehydrator group is also wrapped Rotary wash ball is included, the rotary wash ball is rotatably arranged at the inside of the drying tower, and the rotary wash ball is by height Press pump drives.
6. vacuum spray dehydrator group according to claim 1, it is characterised in that vacuum in the drying tower for- 0.04~-0.1MPa.
7. vacuum spray dehydrator group according to claim 1, it is characterised in that the heater is heating pipe, institute The outside that heating pipe is sheathed on the feed pipe is stated, is formed between the heating pipe and the feed pipe for for adding The heating passage of hot liquid flow, the heating pipe have the inlet and liquid outlet connected with the heating passage.
8. vacuum spray dehydrator group according to claim 1, it is characterised in that the atomizer is located at the drying The center of top of tower.
A kind of 9. vacuum spray drying method, it is characterised in that the vacuum spray drying method includes:
The feed liquid in material liquid tank is delivered in charging line by feed pump, and the feed liquid in the charging line carried out outer Portion's conduction heating;
Feed liquid after heating is atomized and entered in the drying chamber of drying tower by atomizer, wherein, the drying chamber is in true Altitude.
10. vacuum spray drying method according to claim 9, it is characterised in that the vacuum spray drying method is also Including:
The moisture that feed liquid separates after being dried in the drying chamber, which enters in separating mechanism, carries out secondary separation, wherein, seperator Structure is cyclone separator or cloth bag separator;
The solvent separated after redrying, which enters in filter, to be filtered, and is then condensed and is entered in surge tank by condenser.
CN201710888399.5A 2017-09-27 2017-09-27 A kind of vacuum spray dehydrator group and method Pending CN107441747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710888399.5A CN107441747A (en) 2017-09-27 2017-09-27 A kind of vacuum spray dehydrator group and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710888399.5A CN107441747A (en) 2017-09-27 2017-09-27 A kind of vacuum spray dehydrator group and method

Publications (1)

Publication Number Publication Date
CN107441747A true CN107441747A (en) 2017-12-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710888399.5A Pending CN107441747A (en) 2017-09-27 2017-09-27 A kind of vacuum spray dehydrator group and method

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109701448A (en) * 2018-11-21 2019-05-03 中化地质矿山总局地质研究院 A kind of apatite collecting agent dry solidification production method and equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109701448A (en) * 2018-11-21 2019-05-03 中化地质矿山总局地质研究院 A kind of apatite collecting agent dry solidification production method and equipment

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