CN214913438U - Closed-cycle airflow spray dryer - Google Patents
Closed-cycle airflow spray dryer Download PDFInfo
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- CN214913438U CN214913438U CN202121371814.8U CN202121371814U CN214913438U CN 214913438 U CN214913438 U CN 214913438U CN 202121371814 U CN202121371814 U CN 202121371814U CN 214913438 U CN214913438 U CN 214913438U
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Abstract
The utility model discloses a closed circulation air current spray drier belongs to desiccator technical field. A closed cycle airflow spray dryer comprising: the device comprises a dust removal unit, a heating and drainage unit and a gas recovery unit, wherein a gas inlet of the dust removal unit is connected with a cyclone discharge unit through a gas guide tube and is used for carrying out dust removal treatment on air discharged by the cyclone discharge unit; the temperature rise drainage unit is connected to the top of the drying tower, and conveys the air in the drying tower to the filtering and heating unit for secondary heating; the gas inlet end of the gas recovery unit is connected with the gas outlet end of the dust removal unit through a pipeline and used for circularly preheating gas flow; the utility model discloses a dust removal unit, the use of intensification drainage unit, gas recovery unit have solved the most closed circulation of non-of current centrifugal spray dryer, and exhaust air is difficult to recycle and causes the wasting of resources to exhaust air purification is not thorough, the easy polluted environment's problem.
Description
Technical Field
The utility model relates to a desiccator technical field especially relates to a closed circulation air current spray drier.
Background
The drying principle of the spray dryer is that air is filtered and heated and enters an air distributor at the top of the dryer, and the hot air uniformly enters a drying chamber in a spiral shape. The feed liquid is sprayed into fine foggy liquid beads by a high-speed centrifugal atomizer at the top of the tower body in a rotating way, and the fine foggy liquid beads are in parallel flow contact with hot air and can be dried into finished products in a short time. The finished product is continuously output from the bottom of the drying tower and the cyclone separator, and the waste gas is evacuated by the induced draft fan.
But waste gas among the current spray dryer is not directly arranged to the air through the draught fan through purification treatment in, cause environmental pollution easily, and drying tower among the current closed cycle spray dryer is when the drying, cause the hot-air temperature to descend when feed liquid material and hot-air contact, resume and cause the material drying incomplete easily when dry to the material again, the phenomenon of adhesion caking appears, and the material through primary drying is directly discharged and is collected, often because of the incomplete adhesion of drying appearing in receiving the workbin and pile up the phenomenon, and in the air in the current spray dryer used the back direct discharge air, the air smugglies the unable recycle of waste heat secretly, cause the wasting of resources easily.
SUMMERY OF THE UTILITY MODEL
The utility model aims at prior art's weak point, provide a closed circulation air current spray drier, through the use of dust removal unit, intensification drainage unit, gas recovery unit, solved current spray drier exhaust air waste heat and be difficult to recycle and cause the wasting of resources easily, exhaust air purification is not thorough, easy polluted environment and the feed liquid material only through once dry, the problem of adhesion caking appears thoroughly easily in the drying.
In order to achieve the above object, the utility model provides a following technical scheme:
a closed cycle airflow spray dryer comprising:
a drying tower;
a feeding unit; the feeding unit is connected with the drying tower through a pipeline and is used for feeding materials into the drying tower;
a filtering and heating unit; the filtering and heating unit is connected with the drying tower through a pipeline and is used for conveying heated air into the drying tower;
a cyclone discharge unit; the cyclone discharging unit is connected with the discharging end of the drying tower through a drainage tube and is used for secondary drying and separation of materials;
a dust removal unit; the air inlet of the dust removal unit is connected with the cyclone discharge unit through an air duct and is used for carrying out dust removal treatment on the air discharged by the cyclone discharge unit;
a temperature rise drainage unit; the temperature rise drainage unit is connected to the top of the drying tower, and conveys the air in the drying tower to the filtering and heating unit for secondary heating;
a gas recovery unit; the gas inlet end of the gas recovery unit is connected with the gas outlet end of the dust removal unit through a pipeline and used for circularly preheating gas flow;
a dehumidifying and drying unit; the dehumidifying and drying unit is connected with the discharge end of the drying tower and the discharge end of the cyclone discharging unit through pipelines and is used for secondary drying of materials.
Preferably, the dust removing unit includes:
a dedusting tower;
a first induced draft fan; the air outlet end of the first induced draft fan is communicated with the air inlet end of the dust removal tower;
a water tank; the water tank is connected to the bottom end of the dust removal tower and communicated with the dust removal tower;
an air outlet pipe; one end of the air outlet pipe is connected with the air outlet end of the dust removal tower.
Preferably, a water suction pump is communicated with one side surface of the water tank along the negative direction of the X axis of the coordinate system through a water inlet pipe; the water outlet end of the water suction pump is communicated with a spraying assembly connected to the outer surface of the dust removal tower through a water outlet pipe.
Preferably, the spray assembly comprises:
the joint pipe is communicated with the water outlet pipe;
a water diversion pipe; the water distribution pipe is connected to the outer surface of the dust removal tower and communicated with the top end of the joint pipe;
a shower pipe; a plurality of the shower is connected to the distributive pipe top, the water outlet end of shower runs through the gas wash tower and extends to inside the gas wash tower.
Preferably, the gas recovery unit includes:
a preheater; the air inlet end of the preheater is communicated with the air outlet pipe through an air inlet pipe; the air preheating device is used for preheating the air after dust removal;
a second induced draft fan; and the air inlet end of the second induced draft fan is communicated with the preheater through an intermediate pipeline.
Preferably, the filtering and heating unit comprises a primary filter connected with a second induced draft fan, the top of the primary filter is communicated with a gas supplementing pipeline, and the outer surface of the gas supplementing pipeline is connected with an air inlet valve.
Preferably, the temperature rise and drainage unit comprises a fourth induced draft fan connected to the top of the drying tower; the air inlet end of the fourth induced draft fan is communicated with the drying tower through an exhaust pipe; and the air outlet end of the fourth induced draft fan is communicated with the primary filter through an air guide pipe.
Preferably, the dehumidifying and drying unit comprises a dehumidifier; and the two side surfaces of the dehumidifier along the X-axis direction of the coordinate system are connected with a material receiving assembly through an air supply pipe.
Preferably, the receiving assembly comprises:
the conical tank is communicated with the air supply pipe;
a material guide pipe; the top end of the material guide pipe is communicated with the bottom end of the conical tank through a material valve;
a material receiving tank; the top end of the material receiving tank is communicated with the bottom end of the material guide pipe through a material valve.
Preferably, one of the material receiving assemblies is connected with the discharge end of the drying tower, and the other two material receiving assemblies are connected with the discharge opening of the cyclone discharge unit.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses a dust removal unit's use, the waste gas after will using is collected and is carried out purification treatment to dust removal unit in, improves the purity of waste gas to this structure utilizes the purification treatment of water resource, and the water resource can reuse, and is energy-concerving and environment-protective, has reduced the pollution to the environment.
(2) The utility model discloses a gas recovery unit's use, reuse in air drainage to the filtration heating unit through the dust removal unit purification, air purity after the purification is higher, and impurity is less, can reduce the consumption of each filter when recycling, improves whole dry purity and efficiency to the air after the purification carries out preheating treatment through gas recovery unit, has reduced follow-up electrical heating's energy resource consumption.
(3) The utility model discloses a use of intensification drainage unit carries out the secondary heating in drainage to the filtration heating unit again with the air drainage after cooling in the drying tower, improves the heat degree of air, and then promotes the degree of drying of feed liquid material, is favorable to carrying out recycle to the waste heat of cooling air.
(4) The utility model discloses a dehumidification drying unit's use carries out the secondary heating to the material after the drying tower heating, further heats the not thorough adhesion material granule of drying, improves the degree of dryness of material.
To sum up, the utility model has the advantages of dry thoroughly, waste heat recycle, air-purifying etc.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic bottom view of the present invention shown in fig. 1;
fig. 3 is a left side view of the structure of fig. 1 according to the present invention;
FIG. 4 is a schematic view of the dust removal unit and the gas recovery unit of FIG. 1;
FIG. 5 is a schematic view of the dehumidification drying unit, the drying tower and the cyclone discharging unit of FIG. 1;
FIG. 6 is a schematic view of the material receiving assembly shown in FIG. 5 according to the present invention;
fig. 7 is a schematic structural view of the spray assembly of fig. 4 according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Example one
As shown in fig. 1-3, a closed cycle air flow spray dryer comprising:
a drying tower 1;
a feeding unit 2; the feeding unit 2 is connected with the drying tower 1 through a pipeline and is used for feeding materials into the drying tower 1;
a filtering and heating unit 3; the filtering and heating unit 3 is connected with the drying tower 1 through a pipeline and is used for conveying heated air into the drying tower 1;
a cyclone discharge unit 5; the cyclone discharge unit 5 is connected with the discharge end of the drying tower 1 through a drainage tube 4 and is used for secondary drying and separation of materials;
the top of the drying tower 1 is connected with an atomizer 11 extending into the drying tower 1, and the atomizer 11 is connected with the feeding unit 2 and is used for atomizing feed liquid in the feeding unit 2; the feeding unit 2 comprises a feed liquid tank 201, a discharge port of the feed liquid tank 201 is connected with a feed liquid pump 203 through a liquid outlet pipe 202, a discharge end of the feed liquid pump 203 is connected with the atomizer 11 through a feed liquid pipe 204, during use, feed liquid in the feed liquid tank 201 is extracted to the atomizer 11 through the feed liquid pump 203 for atomization treatment, and the atomized feed liquid is in contact with hot air in the drying tower 1 for drying treatment.
As shown in fig. 1 and 4, the filtering and heating unit 3 includes a primary filter 301 connected to a second induced draft fan 904, the top of the primary filter 301 is communicated with a gas supplementing pipe 306, and the outer surface of the gas supplementing pipe 306 is connected to an air inlet valve 307;
it should be noted that the top of the drying tower 1 is connected with a spiral volute extending into the drying tower 1, the top of the drying tower 1 is provided with an air release hole 101, one end of the primary filter 301 is connected with a middle-effect filter 303 through a third draught fan 302, the top of the middle-effect filter 303 is communicated with an electric heater 304, the top of the electric heater 304 is connected with the spiral volute through an induced air pipeline 305, when the spray dryer is used, air in the primary filter 301 is sent to the middle-effect filter 303 for filtration treatment, the treated air is heated by the electric heater 304, the heated air enters the drying tower 1 through the induced air pipeline 305 and the spiral volute to be contacted with atomized feed liquid, the feed liquid is dried, the whole spray dryer is a closed cycle, if the pressure in the dryer is reduced, an air inlet valve 307 is opened, air is introduced through an air supplement pipeline 306, if the pressure is higher, the air is discharged through the air discharge hole 101 at the top of the drying tower 1, and the pressure is reduced.
As shown in fig. 1 and 5, it should be noted that the cyclone discharging unit 5 includes a supporting frame 501, a first-stage discharger 502 and a second-stage discharger 503 are respectively connected to the supporting frame 501, a feeding end of the first-stage discharger 502 is communicated with the drainage tube 4, top ends of the first-stage discharger 502 and the second-stage discharger 503 are both communicated with a cyclone roof 504, an air outlet end of the cyclone roof 504 connected to a top of the first-stage discharger 502 is connected to an air inlet end of the second-stage discharger 502, and an air outlet end of the cyclone roof 504 connected to a top of the second-stage discharger 503 is connected to the dust removing unit 7 through an air duct 6; when the cyclone dust removal drying device is used, the material in the drying tower 1 is guided to the primary discharger 502 by the drainage tube 4 for cyclone dust removal discharge, the material which is not discharged completely and air enter the secondary scouring device 502 for secondary treatment, and the treated air enters the dust removal unit 7 for dust removal treatment.
As shown in fig. 2, 4 and 7, the spray dryer further includes: a dust removal unit 7; an air inlet of the dust removal unit 7 is connected with the cyclone discharging unit 5 through an air duct 6 and is used for performing dust removal treatment on air discharged by the cyclone discharging unit 5;
the dust removing unit 7 includes:
a dust removal tower 702;
a first induced draft fan 701; the air outlet end of the first induced draft fan 701 is communicated with the air inlet end of the dust removal tower 702;
a water tank 703; the water tank 703 is connected to the bottom end of the dust removal tower 702 and communicated with the dust removal tower 702;
an outlet tube 708; one end of the air outlet pipe 708 is connected with the air outlet end of the dust removal tower 702;
a water tank 703 is communicated with a water suction pump 705 through a water inlet pipe 704 along one side surface in the negative direction of the X axis of the coordinate system; the water outlet end of the water pump 705 is communicated with a spraying component 707 connected to the outer surface of the dust removal tower 702 through a water outlet pipe 706;
the shower assembly 707 includes:
a joint pipe 709 communicating with the water outlet pipe 706;
a shunt tube 710; the water diversion pipe 710 is connected to the outer surface of the dust removal tower 702 and communicated with the top end of the connector pipe 709;
a shower 711; a plurality of spray pipes 711 are connected to the top ends of the water distribution pipes 710, and water outlet ends of the spray pipes 711 penetrate through the dust removal tower 702 and extend into the dust removal tower 702;
it should be noted that, when the air purifier is used, gas discharged from the secondary discharger 503 is guided to the dust removal tower 702 through the air duct 6 and the first induced draft fan 701, water in the water tank 703 is pumped to the spraying assembly 707 by the water suction pump 705, and is discharged through the spraying pipe 711 extending into the dust removal tower 702, the number of the spraying pipes 711 is four, sprayed water drops meet with rising air flow, dust particles entrained in the air flow are carried to the water tank 703, and the purpose of purifying the air is achieved.
Example two
As shown in fig. 1, in which the same or corresponding components as in the first embodiment are denoted by the same reference numerals as in the first embodiment, only the points of difference from the first embodiment will be described below for the sake of convenience. The second embodiment is different from the first embodiment in that:
the spray dryer further comprises: a temperature rise drainage unit 8; the heating and drainage unit 8 is connected to the top of the drying tower 1, and conveys the air in the drying tower 1 to the filtering and heating unit 3 for secondary heating;
the heating and drainage unit 8 comprises a fourth induced draft fan 801 connected to the top of the drying tower 1; the air inlet end of a fourth induced draft fan 801 is communicated with the drying tower 1 through an exhaust pipe 802; the air outlet end of the fourth induced draft fan 801 is communicated with the primary filter 301 through an air guide pipe 803;
it should be noted that, during the use, the fourth induced draft fan 801 is utilized to guide the air in the drying tower 1 to the primary filter 301 through the gas conduit 803, and the temperature of the gas is raised through the reprocessing of the filtering and heating unit 3, so as to achieve the purpose that the air in the drying tower 1 is contacted with the feed liquid to dry the feed liquid, but the temperature of the mixed air is reduced, if the air is contacted with the feed liquid again for drying, the feed liquid is prone to drying incompletely and adhering and caking, the cooled air still has residual temperature, and the air is guided to the filtering and heating unit 3 for secondary heating, so that the utilization rate of the residual heat of the air can be improved, and the conversion and drying efficiency of the air can be improved.
As shown in fig. 1 and 4, the spray dryer further includes: a gas recovery unit 9; the gas inlet end of the gas recovery unit 9 is connected with the gas outlet end of the dust removal unit 7 through a pipeline and used for circularly preheating gas flow;
the gas recovery unit 9 includes:
a pre-heater 902; the air inlet end of the preheater 902 is communicated with the air outlet pipe 708 through an air inlet pipe 901; the air preheating device is used for preheating the air after dust removal;
a second induced draft fan 904; the air inlet end of the second induced draft fan 904 is communicated with a preheater 902 through a middle pipeline 903;
it should be noted that, the air purity after being purified by the dust removal unit 7 is high, and if the air purity introduced into the filtering and heating unit 3 from the outside is low, the air after being purified by the dust removal unit 7 is guided to the filtering and heating unit 3 through multistage filtering treatment, the pressure of subsequent filtering can be reduced, the circulation conversion of the air is accelerated, and the pre-heater 902 performs pre-heating treatment on the guided air, so that the pressure of subsequent electric heating is reduced, and the circulation rate of the air is improved.
EXAMPLE III
As shown in fig. 1 and 5, the same or corresponding components as those in the first and second embodiments are denoted by the same reference numerals as those in the first and second embodiments, and only the differences from the first and second embodiments will be described below for the sake of convenience. The third embodiment is different from the first and second embodiments in that:
the spray dryer further comprises: a dehumidifying and drying unit 10; the dehumidifying and drying unit 10 is connected with the discharge end of the drying tower 1 and the discharge end of the cyclone discharge unit 5 through pipelines and is used for secondary drying of materials;
the dehumidifying and drying unit 10 includes a dehumidifier 1001; the dehumidifier 1001 is connected with a material receiving component 1003 through an air supply pipe 1002 along the two side surfaces of the coordinate system in the X-axis direction;
as shown in fig. 6, the material receiving assembly 1003 includes:
a conical tank 1004 communicated with the blast pipe 1002;
a material guide tube 1006; the top end of the material guide pipe 1006 is communicated with the bottom end of the conical tank 1004 through a material valve 1005;
a material receiving tank 1007; the top end of the material receiving tank 1007 is communicated with the bottom end of the material guide pipe 1006 through a material valve 1005;
the feeding end of one material receiving assembly 1003 is connected with the discharging end of the drying tower 1, and the feeding ends of the other two material receiving assemblies 1003 are connected with the discharging opening of the cyclone discharging unit 5;
it should be noted that the material in the drying tower 1 is discharged after being dried for the first time, but in the drying tower 1, when the material liquid is insufficiently contacted with the hot air, the material liquid is easily attached and condensed, so that insufficient drying is caused, and the dehumidifier 1001 is used for blowing the hot air into the drying tower 1, the primary discharger 502 and the secondary discharger 503 to perform secondary drying on the bonded material, so that the dryness of the material drying is improved, and the drying rate of the material is improved.
The working steps are as follows:
step one, an air inlet valve 307 is opened, and the third induced draft fan 302 introduces external air into the filtering and heating unit 3 for heating.
And step two, the material in the material liquid pipe 201 is guided to the atomizer 11 through the liquid inlet pipe 204 by the material liquid pump 203, and atomization operation is performed.
And step three, guiding the insufficiently dried materials to a cyclone discharging unit 5 through a drainage tube 4 for secondary dust removal and discharging.
And step four, in the process of guiding materials by the drainage tube 4, the dehumidifying and drying unit 10 carries out secondary drying treatment on the materials dried in the drying tower 1 and the materials in the cyclone discharging unit 5.
And step five, guiding the air passing through the cyclone discharging unit 5 to a dust removal unit 7 through a first induced draft fan 701 for purification treatment.
And step six, introducing the air purified by the dust removal unit 7 into a preheater 902 through an air inlet pipe 901 for preheating, and guiding the air subjected to preheating into the primary filter 301 through a second induced draft fan 904 for next cycle drying.
And seventhly, while the drying tower 1 is used for drying the materials, the fourth induced draft fan 801 is used for guiding the air cooled in the drying tower 1 to the primary filter 301, namely the filtering and drying unit 3, through the gas conduit 803 for secondary heating treatment, and the air waste heat in the drying tower 1 is recycled.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A closed cycle airflow spray dryer comprising:
a drying tower (1);
a feeding unit (2); the feeding unit (2) is connected with the drying tower (1) through a pipeline and is used for feeding materials into the drying tower (1);
a filtering and heating unit (3); the filtering and heating unit (3) is connected with the drying tower (1) through a pipeline and is used for conveying heating air into the drying tower (1);
a cyclone discharge unit (5); the cyclone discharge unit (5) is connected with the discharge end of the drying tower (1) through a drainage tube (4) and is used for secondary drying and separation of materials;
it is characterized by also comprising:
a dust removal unit (7); the air inlet of the dust removal unit (7) is connected with the cyclone discharge unit (5) through an air duct (6) and is used for carrying out dust removal treatment on air discharged by the cyclone discharge unit (5);
a temperature rise drainage unit (8); the temperature-rising drainage unit (8) is connected to the top of the drying tower (1), and air in the drying tower (1) is conveyed to the filtering and heating unit (3) for secondary heating;
a gas recovery unit (9); the gas inlet end of the gas recovery unit (9) is connected with the gas outlet end of the dust removal unit (7) through a pipeline and used for circularly preheating gas flow;
a dehumidifying and drying unit (10); the dehumidifying and drying unit (10) is connected with the discharge end of the drying tower (1) and the discharge end of the cyclone discharging unit (5) through pipelines and is used for secondary drying of materials.
2. A closed cycle gas stream spray dryer according to claim 1, wherein the dust removal unit (7) comprises:
a dust removal tower (702);
a first induced draft fan (701); the air outlet end of the first induced draft fan (701) is communicated with the air inlet end of the dust removal tower (702);
a water tank (703); the water tank (703) is connected to the bottom end of the dust removing tower (702) and communicated with the dust removing tower (702);
an outlet duct (708); one end of the air outlet pipe (708) is connected with the air outlet end of the dust removal tower (702).
3. The closed-cycle airflow spray dryer according to claim 2, wherein the water tank (703) is connected to a suction pump (705) through a water inlet pipe (704) along one side surface in the negative direction of the X-axis of the coordinate system; the water outlet end of the water suction pump (705) is communicated with a spraying assembly (707) connected to the outer surface of the dust removal tower (702) through a water outlet pipe (706).
4. A closed cycle gas flow spray dryer according to claim 3, wherein the spray assembly (707) comprises:
a joint pipe (709) communicated with the water outlet pipe (706);
a knock out pipe (710); the water diversion pipe (710) is connected to the outer surface of the dust removal tower (702) and communicated with the top end of the connector pipe (709);
a shower (711); the spraying pipes (711) are connected to the top ends of the water distribution pipes (710), and the water outlet ends of the spraying pipes (711) penetrate through the dust removal tower (702) and extend into the dust removal tower (702).
5. A closed cycle gas stream spray dryer according to claim 2, wherein the gas recovery unit (9) comprises:
a pre-heater (902); the air inlet end of the preheater (902) is communicated with the air outlet pipe (708) through an air inlet pipe (901); the air preheating device is used for preheating the air after dust removal;
a second induced draft fan (904); and the air inlet end of the second induced draft fan (904) is communicated with the preheater (902) through a middle pipeline (903).
6. The closed-cycle airflow spray dryer according to claim 5, wherein the filtering and heating unit (3) comprises a primary filter (301) connected with a second induced draft fan (904), the top of the primary filter (301) is communicated with an air supplement pipeline (306), and the outer surface of the air supplement pipeline (306) is connected with an air inlet valve (307).
7. The closed cycle gas stream spray dryer according to claim 6, wherein the temperature rising and guiding unit (8) comprises a fourth induced draft fan (801) connected to the top of the drying tower (1); the air inlet end of the fourth induced draft fan (801) is communicated with the drying tower (1) through an exhaust pipe (802); and the air outlet end of the fourth induced draft fan (801) is communicated with the primary filter (301) through an air guide pipe (803).
8. A closed cycle airflow spray dryer according to claim 1, wherein said desiccant drying unit (10) comprises a dehumidifier (1001); and the two side surfaces of the dehumidifier (1001) along the X-axis direction of the coordinate system are connected with a material receiving assembly (1003) through an air supply pipe (1002).
9. The closed loop air flow spray dryer of claim 8 wherein the collection assembly (1003) comprises:
a conical tank (1004) communicated with the blast pipe (1002);
a guide tube (1006); the top end of the material guide pipe (1006) is communicated with the bottom end of the conical tank (1004) through a material valve (1005);
a material receiving tank (1007); the top end of the material receiving tank (1007) is communicated with the bottom end of the material guide pipe (1006) through a material valve (1005).
10. A closed cycle airflow spray dryer according to claim 8 or 9, wherein one of said receiving members (1003) is connected to the discharge end of said drying tower (1) and the other two receiving members (1003) are connected to the discharge outlet of said cyclone discharge unit (5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121371814.8U CN214913438U (en) | 2021-06-21 | 2021-06-21 | Closed-cycle airflow spray dryer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121371814.8U CN214913438U (en) | 2021-06-21 | 2021-06-21 | Closed-cycle airflow spray dryer |
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| CN214913438U true CN214913438U (en) | 2021-11-30 |
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