Spray drying device for preparing superfine calcium carbonate powder

Abstract

The utility model discloses a spray drying device for preparing superfine calcium carbonate powder, which comprises a base, the base is connected with a drying part, the drying part comprises a spraying part and a drying part, the spraying part is mounted on the base and comprises a shell arranged on the base, and a feeding part is arranged on the right side of the base; the processing part is installed on the base and used for processing air supply for spray drying, the processing part comprises an air pump, and a cyclone dust collector is arranged on the rear side of the shell. According to the spray drying device for preparing the superfine calcium carbonate powder, in the preparation process of the superfine calcium carbonate powder, an air compressor, a three-way valve and a vortex tube are matched with one another, heat is supplied to a heating pipe, cold is supplied to a cooling frame, gas generated by an air pump is heated, and meanwhile water vapor in the gas outlet end of a cyclone dust collector is promoted to be liquefied; and potential safety hazards caused by direct emission of waste gas containing water vapor are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrafine calcium carbonate powder preparation, in particular to a spray drying device for preparing ultrafine calcium carbonate powder. Background Art

[0002] When preparing ultrafine calcium carbonate powder, a corresponding spray drying device is required for drying it. Referring to a modified light calcium carbonate preparation dry method disclosed in publication number CN113082746A, the method includes a drying tower, a blower, an electric heater, an atomizing device, a feeding device, and a separating device, which expands the working range and can prevent the powder from sticking to the equipment and affecting production. As shown in the above patent, when the existing spray drying device for preparing ultrafine calcium carbonate powder is used, the exhaust end of the device directly discharges waste gas containing a large amount of water vapor, which is likely to cause safety hazards. In addition, the device has a poor effect in stripping off the residual material attached to its inner wall. Scraping the inner wall of the device by a scraper to promote the shedding of the attached powder residual material will cause powder residual material to adhere to the scraping end, affecting the material recovery rate. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a spray drying device for preparing ultrafine calcium carbonate powder, which solves the problems of poor treatment effect of the device on water vapor in the exhaust gas, difficulty in effectively stripping off the residual powder attached inside, affecting the efficiency of the device.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A spray drying device for preparing ultrafine calcium carbonate powder includes a base, the base is connected to a drying member for preparing ultrafine calcium carbonate powder, and the drying member includes:

[0005] A sprayer is mounted on the base. The sprayer comprises a shell provided on the base. A feeding member for material extraction and spraying is provided on the right side of the base.

[0006] A processing unit is installed on the base for air supply processing for spray drying. The processing unit includes an air pump fixedly connected to the base. A cyclone dust collector is provided on the rear side of the shell. The exhaust end of the top of the cyclone dust collector is provided with a cooling unit for cooling the exhaust gas. An injection ring is installed on the upper side of the shell. A bend is provided on the upper left end of the injection ring. An adjustment unit connected to the bend is connected to the injection end of the air pump. The adjustment unit is used to heat the injection end of the air pump and adjust the cooling supply of the cooling unit;

[0007] The spray ring is installed on the top edge of the shell to clean the inner wall of the shell.

[0008] Preferably, the sprayer further comprises a recovery tank mounted on the bottom of the housing, and the base is connected to a storage plate that fits the bottom of the recovery tank.

[0009] Preferably, the regulating part includes an air compressor mounted on a base, a three-way valve is mounted on the jet end of the air compressor, a branch pipe connected to the injection ring is provided on the left side of the three-way valve, a vortex tube is mounted on the right side of the three-way valve, a heating shell with a built-in heating pipe and fixedly connected to the bent pipe is mounted on the exhaust end of the air pump, and a cold air pipe connected to the cooling part is provided on the rear side of the vortex tube.

[0010] Preferably, the front side of the vortex tube is fixedly connected to the heating tube, the heating tube is a spiral tube, and an exhaust pipe is provided on the rear side of the lower end of the heating tube.

[0011] Preferably, the cooling component includes an air outlet pipe arranged on the upper side of the cyclone dust collector, a casing with a built-in cooling frame is installed on the left side of the air outlet pipe, the cooling frame is connected to the cooling end of the adjustment component, and a drainage component is provided at the bottom of the casing.

[0012] Preferably, the cooling frame is hollow inside and a cooling pipe is provided on the rear side. The drainage component includes a drainage valve provided at the bottom of the casing, and a drainage pipe is installed at the bottom of the drainage valve.

[0013] Beneficial effects

[0014] The utility model provides a spray drying device for preparing ultrafine calcium carbonate powder. Compared with the existing technology, it has the following advantages:

[0015] (1) The spray drying device for preparing ultrafine calcium carbonate powder is provided with a processing part in the device. During the preparation process of ultrafine calcium carbonate powder, the air compressor, the three-way valve and the vortex tube cooperate with each other to respectively provide heat to the heating tube and cool to the cooling frame. While heating the gas generated by the air pump, the water vapor in the outlet end of the cyclone dust collector is promoted to liquefy, thereby avoiding the direct discharge of waste gas containing water vapor to cause safety hazards. After the drying operation of the device is completed, the three-way valve is reversed. At this time, the compressed air generated by the air compressor is blown to the inner wall of the shell through the three-way valve, the branch pipe and the jet ring, thereby promoting the shedding of residual materials attached to the inner wall of the shell, avoiding direct scraping of the inner wall of the shell to cause residual materials attached to the scraping end, improving the material recovery efficiency and reducing waste.

[0016] (2) The spray drying device for preparing ultrafine calcium carbonate powder is provided with a storage plate in the device. During the drying process of the device, the recovery tank receives the ultrafine calcium carbonate powder that has not been dried. The hot air from the heating pipe is introduced into the storage plate through the heat exhaust pipe. The hot air heats the storage plate through heat exchange, and the storage plate heats the recovery tank through heat transfer, thereby promoting the evaporation of water in the material inside the recovery tank and improving the drying efficiency of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 This is a partial cross-sectional enlarged view of the utility model;

[0019] Figure 3 It is an enlarged view of the adjusting member of the utility model;

[0020] Figure 4 It is an enlarged cross-sectional view of the cooling element of the present invention.

[0021] In the figure: 1. Base; 2. Sprayer; 21. Shell; 22. Recovery tank; 23. Storage plate; 24. Feeding part; 3. Processing part; 31. Air pump; 32. Adjusting part; 321. Air compressor; 322. Three-way valve; 323. Branch pipe; 324. Vortex tube; 325. Heating shell; 326. Heating pipe; 327. Cold air pipe; 33. Elbow; 34. Jet ring; 35. Cyclone dust collector; 36. Cooling part; 361. Exhaust pipe; 362. Casing; 363. Cooling frame; 364. Drainage part; 4. Jet ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See Figure 1-4 , the utility model provides the following two technical solutions:

[0024] First embodiment: A spray drying device for preparing ultrafine calcium carbonate powder, comprising a base 1, connected to a drying element for preparing ultrafine calcium carbonate powder, the drying element comprising: a spray element 2 mounted on the base 1, the spray element 2 comprising a housing 21 disposed on the base 1, and a feed element 24 for material extraction and spraying provided on the right side of the base 1;

[0025] The processing unit 3 is mounted on the base 1 and is used for air supply processing for spray drying. The processing unit 3 includes an air pump 31 fixedly connected to the base 1. A cyclone dust collector 35 is provided on the rear side of the housing 21. The top exhaust end of the cyclone dust collector 35 is provided with a cooling unit 36 ​​for cooling the exhaust gas. An injection ring 34 is installed on the upper side of the housing 21. A bend 33 is provided on the upper left end of the injection ring 34. The injection end of the air pump 31 is connected to an adjustment unit 32 connected to the bend 33. The adjustment unit 32 is used to heat the injection end of the air pump 31 and cool the cooling unit 36. The injection ring 4 is installed on the top edge of the housing 21 and is used to clean the inner wall of the housing 21.

[0026] The regulating member 32 includes an air compressor 321 mounted on the base 1. A three-way valve 322 is mounted on the jet end of the air compressor 321. A branch pipe 323 connected to the jet ring 4 is provided on the left side of the three-way valve 322. A vortex tube 324 is mounted on the right side of the three-way valve 322. A heating shell 325 with a built-in heating pipe 326 and fixedly connected to the elbow 33 is mounted on the exhaust end of the air pump 31. A cold air pipe 327 connected to the cooling member 36 is provided on the rear side of the vortex tube 324. The front side of the vortex tube 324 is fixedly connected to the heating pipe 326. The heating pipe 326 is a spiral pipe, and an exhaust pipe is provided on the rear side of the lower end of the heating pipe 326.

[0027] The cooling element 36 includes an air outlet pipe 361 provided on the upper side of the cyclone dust collector 35. A housing 362 with a built-in cooling frame 363 is installed on the left side of the air outlet pipe 361. The cooling frame 363 is connected to the cooling end of the regulating element 32. A drainage element 364 is provided at the bottom of the housing 362. The cooling frame 363 is hollow inside and a cooling pipe is provided at the rear side. The drainage element 364 includes a drainage valve provided at the bottom of the housing 362. A drainage pipe is installed at the bottom of the drainage valve. In the process of preparing ultrafine calcium carbonate powder, the air compressor 321, three-way valve 322, and vortex tube 324 cooperate with each other to provide heat to the heating tube 326 and cool to the cooling frame 363, respectively. While heating the gas generated by the air pump 31, it promotes the liquefaction of water vapor in the outlet end of the cyclone dust collector 35. After the drying operation of the device is completed, the three-way valve 322 is reversed. At this time, the compressed air generated by the air compressor 321 is blown toward the inner wall of the shell 21 through the three-way valve 322, branch pipe 323, and jet ring 34, promoting the removal of residual materials attached to the inner wall of the shell 21.

[0028] The second embodiment differs from the first embodiment mainly in that:

[0029] The sprayer 2 also includes a recovery tank 22 mounted on the bottom of the shell 21. A storage plate 23 is connected to the base 1 and is in contact with the bottom of the recovery tank 22. The storage plate 23 is hollow inside and is fixedly connected and communicated with the exhaust pipe. A heat exhaust pipe is provided on the front side of the storage plate 23. During the drying process of the device, the recovery tank 22 receives undried ultrafine calcium carbonate powder, and the hot air passing through the heating pipe 326 is introduced into the storage plate 23 through the heat exhaust pipe. The hot air heats the storage plate 23 through heat exchange, and the storage plate 23 heats the recovery tank 22 through heat transfer, thereby promoting the evaporation of moisture in the material inside it.

[0030] At the same time, the contents not described in detail in this specification belong to the existing technology known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0031] During use, the user starts the air compressor 321, which generates compressed air and injects it into the vortex tube 324 through the three-way valve 322. The vortex tube 324 converts the compressed air into hot air and cold air through vortex conversion. The hot air is introduced into the heating pipe 326 through the front side of the vortex tube 324 and then into the storage plate 23 through the exhaust pipe. The cold air is introduced into the cooling frame 363 through the cold air pipe 327 and ejected through the cold exhaust pipe on the rear side. After the heating shell 325 reaches the appropriate temperature, the feeding component 24 in the spray component 2, the air pump 31 in the processing component 3, and the cyclone dust collector 35 are turned on. The feeding component 24 extracts the slurry containing ultrafine calcium carbonate powder and sprays the slurry through the top of the shell 21 in an atomized form.

[0032] At the same time, the air pump 31 draws in external air and sprays it through the heating shell 325, the heating tube 326, the elbow 33, and the jet ring 34; the air is converted into hot air through heat exchange when passing through the heating tube 326, and the hot air injected into the shell 21 dries the atomized slurry, promotes water evaporation, and the evaporated material falls into the bottom collection tank through the cyclone dust collector 35, while the water vapor is introduced into the machine shell 362 through the air outlet pipe 361 and liquefied when passing through the cooling frame 363, and the material that is not completely dried falls into the recovery tank 22, and the storage plate 23 heats and dries the material through the recovery tank 22 through heat exchange. In the above process, the vortex tube 324, the cyclone dust collector 35, and the feeding part 24 for material spraying are all existing technologies, so their specific internal structure and working principle are not described in detail.

[0033] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spray drying device for preparing ultrafine calcium carbonate powder, comprising a base (1), characterized in that: The base (1) is connected to a drying component for preparing ultrafine calcium carbonate powder, and the drying component comprises: A spray element (2) is mounted on the base (1), the spray element (2) comprising a housing (21) disposed on the base (1), and a feed element (24) for material extraction and spraying is provided on the right side of the base (1); A processing component (3) is installed on the base (1) and is used for air supply processing for spray drying. The processing component (3) includes an air pump (31) fixedly connected to the base (1). A cyclone dust collector (35) is provided on the rear side of the housing (21). A cooling component (36) for cooling the exhaust gas is provided at the top exhaust end of the cyclone dust collector (35). An air jet ring (34) is installed on the upper inner side of the housing (21). A bend (33) is provided at the upper left end of the air jet ring (34). The air jet end of the air pump (31) is connected to an adjusting component (32) connected to the bend (33). The adjusting component (32) is used to heat the air jet end of the air pump (31) and to adjust the cooling of the cooling component (36). The spray ring (4) is installed on the top edge of the shell (21) and is used for cleaning the inner wall of the shell (21).

2. A spray drying device for preparing ultrafine calcium carbonate powder according to claim 1, characterized in that: The spray element (2) further comprises a recovery tank (22) mounted on the bottom of the housing (21), and a storage plate (23) is connected to the base (1) and is in contact with the bottom of the recovery tank (22).

3. A spray drying device for preparing ultrafine calcium carbonate powder according to claim 1, characterized in that: The regulating member (32) comprises an air compressor (321) mounted on a base (1); a three-way valve (322) is mounted on the jet end of the air compressor (321); a branch pipe (323) connected to the jet ring (4) is mounted on the left side of the three-way valve (322); a vortex tube (324) is mounted on the right side of the three-way valve (322); a heating shell (325) with a built-in heating pipe (326) and fixedly connected to the elbow (33) is mounted on the exhaust end of the air pump (31); and a cold air pipe (327) connected to the cooling member (36) is mounted on the rear side of the vortex tube (324).

4. A spray drying device for preparing ultrafine calcium carbonate powder according to claim 3, characterized in that: The front side of the vortex tube (324) is fixedly connected to the heating tube (326), the heating tube (326) is a spiral tube, and an exhaust pipe is provided at the rear side of the lower end of the heating tube (326).

5. A spray drying device for preparing ultrafine calcium carbonate powder according to claim 1, characterized in that: The cooling element (36) includes an air outlet pipe (361) arranged on the upper side of the cyclone dust collector (35); a casing (362) with a built-in cooling frame (363) is installed on the left side of the air outlet pipe (361); the cooling frame (363) is connected to the cooling end of the regulating element (32); and a drainage element (364) is provided at the bottom of the casing (362).

6. A spray drying device for preparing ultrafine calcium carbonate powder according to claim 5, characterized in that: The cooling frame (363) is hollow inside and has a cooling pipe at the rear. The drainage member (364) includes a drainage valve arranged at the bottom of the casing (362), and a drainage pipe is installed at the bottom of the drainage valve.

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