Mildew-proof putty powder production equipment and preparation process thereof

Abstract

The invention relates to mildewproof putty powder production equipment and a preparation process thereof, and belongs to the technical field of putty powder production.The mildewproof putty powder production equipment comprises a pretreatment module, a multi-stage mixing system, a mildewproof agent precise adding device, a dynamic drying module, a screening and packaging module, a spiral conveyor, a double-gate-plate sealing valve and an equipment support; the multi-stage mixing system comprises a high-speed shearing mixer and a low-speed planetary mixer, materials are conveyed between the high-speed shearing mixer and the low-speed planetary mixer through a spiral conveyor, and the high-speed shearing mixer and the low-speed planetary mixer form a mixing cavity. According to the present invention, the uniformity is improved through the multi-stage mixing system, the multi-stage mixing structure formed by connecting the high-speed shearing mixer and the low-speed planetary mixer in series is adopted, and the wear-resistant ceramic layer inner wall is provided, such that the sufficient dispersion of the base material and the mildew inhibitor is ensured, and the toxicity risk caused by non-uniform dispersion and overhigh local concentration due to the direct dry mixing of the mildew inhibitor is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of putty powder production, in particular to mildew-proof putty powder production equipment and a preparation process thereof. Background Art

[0002] Waterproof putty is a material used for building wall treatment. It has excellent waterproof, crack resistance and weather resistance. It is widely used in humid environments such as kitchens, bathrooms, and basements. The core raw materials of waterproof putty mainly include base materials, fillers, additives and other functional additives. The processing technology mainly includes the following steps: 1. Raw material pretreatment, drying and screening the filler to ensure fineness and moisture content; 2. Ingredient mixing, white cement, filler, cellulose ether, latex powder and other dry powder raw materials are put into the mixer in proportion, and mixed at low speed for 5-10 minutes until uniform; 3. Homogenization treatment, using a high-efficiency double-screw mixer or planetary mixer to ensure no lumps and bubbles, the mixing time is usually 15-20 minutes; 4. Screening and packaging, the mixed finished product is passed through a vibrating screen (80-100 mesh) to remove impurities, and then packaged into bags or barrels (premixed waterproof putty needs to be sealed and moisture-proof).

[0003] Traditional putty powder is prone to mold growth in humid environments, and conventional anti-mold processes have the following defects: 1. Direct dry mixing of the anti-mold agent leads to uneven dispersion, and excessive local concentration causes toxicity risks; 2. High-temperature drying destroys the active ingredients of the anti-mold agent (for example, isothiazolinone decomposes at >70°C); 3. The mixing efficiency of existing equipment is low, and it is easy to produce lumps, affecting construction performance. For this reason, a mildew-proof putty powder production equipment and preparation process are proposed. Through segmented mixing and coordinated control of temperature and humidity, the problems of uneven dispersion and easy failure of mildew inhibitors in traditional processes are solved. Through base material pretreatment, gradient mixing and dynamic drying, efficient retention of mildew-proof active ingredients is achieved. It is particularly suitable for the production and preparation of mildew-proof putty powder used for wall treatment in high-humidity environments such as bathrooms and basements. Summary of the Invention

[0004] The present invention provides a mildew-proof putty powder production equipment and a preparation process thereof, which solves the problems raised by the above-mentioned existing background technology. It adopts a multi-stage mixing structure and is equipped with a wear-resistant ceramic layer inner wall to ensure the full dispersion of the base material and the mildew inhibitor. An ultrasonic atomizer and a nitrogen protection system are introduced to atomize the liquid mildew inhibitor into 10-50μm particles, and oxidation failure is avoided by a nitrogen environment. A double-spiral dryer is used in combination with a temperature and humidity sensor to avoid high temperature destroying the mildew inhibitor activity. High-speed shear mixing and low-speed vacuum stirring are performed in stages, which can effectively enhance the material bonding strength and reduce dust emission. It is suitable for the production and preparation of mildew-proof putty powder used for wall treatment in high-humidity environments such as bathrooms and basements.

[0005] The present invention solves the above technical problems with the following solution: a mildew-proof putty powder production equipment and a preparation process thereof, comprising a pretreatment module, a multi-stage mixing system, a mildew-proof agent precision addition device, a dynamic drying module, a screening and packaging module, a screw conveyor, a double-gate sealing valve, and an equipment bracket, wherein the pretreatment module adopts a rotary drum dryer;

[0006] The multi-stage mixing system includes a high-speed shear mixer and a low-speed planetary mixer, wherein the high-speed shear mixer and the low-speed planetary mixer are connected by a screw conveyor to realize material transportation, and the high-speed shear mixer and the low-speed planetary mixer form a mixing chamber;

[0007] The precise adding device of the mildewcide comprises a metering pump, an ultrasonic atomizer, and a mildewcide storage tank. The two ends of the metering pump are respectively connected to the ultrasonic atomizer and the mildewcide storage tank. The ultrasonic atomizer is connected to a low-speed planetary mixer.

[0008] The dynamic drying module adopts a double spiral dryer;

[0009] The screening and packaging module includes an 80-mesh vibrating screen and an aluminum film moisture-proof bag;

[0010] The equipment bracket bears the weight of each equipment component;

[0011] The preparation process includes the following steps:

[0012] S1, base material pretreatment, the base material is dried at 105 ° C to a moisture content of less than 0.5% by a rotary drum dryer;

[0013] S2, initial mixing: put the dry base material and filler into a high-speed shear mixer in proportion and mix at 1200 rpm for 3 minutes;

[0014] S3, adding the antifungal agent: the antifungal agent in the antifungal agent storage tank is evenly sprayed into the high-speed shear mixer through an ultrasonic atomizer. The atomized particle size of the antifungal agent is 10-50 μm. Nitrogen protection is introduced during the addition process. The nitrogen purity is ≥99.9% to prevent the material from oxidation or moisture.

[0015] S4, final mixing and modification, after the initial mixing is completed, the materials are transferred to a low-speed planetary mixer through a screw conveyor, and water-retaining thickener, water-retaining thickener, and water-retaining thickener are added in sequence, and a vacuum environment of -0.05 to -0.08 MPa is created by a vacuum pump, and the mixture is mixed for 15 minutes under the vacuum environment;

[0016] S5, dynamic drying, the final mixed material is transferred to a double screw dryer and dried at 50°C and 10% humidity to a moisture content of ≤1.2%;

[0017] S6, sieve packaging, packaged after 80 mesh vibrating screen, 80 mesh vibrating screening uses linear vibrating screen, and the sieved materials are packaged in aluminum film moisture-proof bags.

[0018] On the basis of the above technical solution, the present invention can also be improved as follows.

[0019] Furthermore, the rotary drum dryer is equipped with a microwave moisture meter to monitor the drying process in real time. The inner walls of the high-speed shear mixer and the low-speed planetary mixer are provided with a ceramic wear-resistant layer. The inclination angle of the screw conveyor is ≤30° and the screw speed is 20-40rpm to ensure uniform feeding of the powder.

[0020] Furthermore, a serrated dispersion disk is installed inside the high-speed shear mixer with a rotation speed of 1200 rpm to crush the powder agglomerates to a particle size of less than 100 μm, and a PTFE anti-stick coating is sprayed to reduce the adhesion of the inner wall. The low-speed planetary mixer is equipped with planetary blades, and the gap between the planetary blades and the barrel wall is ≤2 mm, and the wall is scraped for self-cleaning. The stirring shaft of the low-speed planetary mixer has a built-in spiral lifting blade to force material circulation. The rotation speed of the low-speed planetary mixer is 15-30 rpm.

[0021] Furthermore, double gate sealing valves are provided at the connection points between the screw conveyor, the high-speed shear mixer and the low-speed planetary mixer to ensure that the vacuum environment of the low-speed planetary mixer of -0.05 to -0.08 MPa is not destroyed.

[0022] Furthermore, the mildew inhibitor storage tank is provided with a material valve, the double-screw dryer is connected to an 80-mesh vibrating screen through a hose, and the equipment bracket is provided with multiple equipment layers and is equipped with an inspection ladder.

[0023] Furthermore, the precise addition device for the mildew inhibitor is equipped with a nitrogen protection module, which includes a liquid nitrogen storage tank, an air-temperature vaporizer, a solenoid valve, and a one-way valve. The liquid nitrogen storage tank and the air-temperature vaporizer are both equipped with a solenoid valve. The liquid nitrogen storage tank, the air-temperature vaporizer, and the one-way valve are connected in sequence, and the one-way valve is connected to a low-speed planetary mixer.

[0024] Furthermore, a radar level meter is installed at the inlet of the low-speed planetary mixer to provide real-time feedback on the material filling amount, dynamically adjust the conveying speed, monitor vacuum fluctuations, automatically compensate for nitrogen flow, and maintain system stability.

[0025] Furthermore, the multi-stage mixing system is equipped with a vacuum holding module, which includes a vacuum pump, a pump body filter, and a vacuum negative pressure gauge. The vacuum pump is connected to the low-speed planetary mixer through the pump body filter. The vacuum pump is equipped with an air storage tank, and the vacuum negative pressure gauge is installed on the low-speed planetary mixer.

[0026] Furthermore, the double-spiral dryer is equipped with a temperature and humidity sensor and a PID controller. The double-spiral dryer is connected to a low-speed planetary mixer. The double-spiral dryer can dynamically dry the material under the action of spiral drive and hot air. The hot air enters from the top and penetrates the gap between the materials. The moisture is discharged from the bottom through negative pressure to achieve rapid and uniform drying. For example, the moisture content is ≤0.05%. The temperature is controlled in sections by the PID controller and maintained at 40-60°C to avoid destroying the active ingredients of the mildew inhibitor while also having a high-temperature sterilization function.

[0027] Furthermore, the connections between the twin-screw dryer, the low-speed planetary mixer and the 80-mesh vibrating screen are all equipped with double-gate sealing valves.

[0028] The beneficial effects of the present invention are as follows: the present invention provides a mildew-proof putty powder production equipment and a preparation process thereof, which have the following advantages:

[0029] 1. Improve uniformity through a multi-stage mixing system. A multi-stage mixing structure that connects a high-speed shear mixer and a low-speed planetary mixer in series, equipped with a wear-resistant ceramic inner wall, ensures full dispersion of the base material and the antifungal agent. Compared with traditional mixing equipment, this can effectively improve mixing efficiency and the uniformity of antifungal agent dispersion, effectively avoiding the uneven dispersion caused by direct dry mixing of the antifungal agent and the risk of toxicity caused by excessive local concentration.

[0030] 2. Set up a precise anti-fungal agent addition device, introduce an ultrasonic atomizer and a nitrogen protection system, which can atomize the liquid anti-fungal agent into 10-50μm particles and prevent oxidation loss in a nitrogen environment. Compared with the traditional dry mixing process, it can effectively prevent high-temperature drying from destroying the active ingredients of the anti-fungal agent;

[0031] 3. The staged mixing operation of high-speed shear mixing and low-speed vacuum stirring can effectively reduce dust emission and enhance material bonding;

[0032] 4. Set up dynamic drying module optimization, use double spiral dryer with temperature and humidity sensor to achieve low temperature precise control, which can effectively avoid high temperature destroying the activity of mildew inhibitor. Isothiazolinone is easy to decompose above 70℃, which is suitable for the production and preparation of mildew-proof putty powder used for wall treatment in high humidity environments such as bathrooms and basements.

[0033] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the description, the following preferred embodiments of the present invention are described in detail with reference to the accompanying drawings. The specific implementation methods of the present invention are given in detail by the following embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 A schematic structural diagram of a mildew-proof putty powder production device and a preparation process thereof provided in one embodiment of the present invention;

[0036] Figure 2 A front view of a mildew-proof putty powder production device and a preparation process thereof provided in one embodiment of the present invention;

[0037] Figure 3 This is a process flow chart of a mildew-proof putty powder production device and its preparation process provided in one embodiment of the present invention.

[0038] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0039] 1. High-speed shear mixer; 2. Low-speed planetary mixer; 3. Screw conveyor; 4. Double-disc sealing valve; 5. Metering pump; 6. Ultrasonic atomizer; 7. Anti-mold agent storage tank; 8. Liquid nitrogen storage tank; 9. Air-temperature vaporizer; 10. Solenoid valve; 11. Check valve; 12. Radar level meter; 13. Vacuum pump; 14. Pump filter; 15. Gas storage tank; 16. Vacuum negative pressure gauge; 17. Double-screw dryer; 18. 80-mesh vibrating screen; 19. Aluminum film moisture-proof bag; 20. Equipment bracket; 21. Maintenance ladder. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-3 The principles and features of the present invention are described, and the examples given are only for the purpose of explaining the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are in a very simplified form and are not in exact proportions, and are only used for the purpose of conveniently and clearly assisting in illustrating the embodiments of the present invention.

[0041] like Figure 1-2 As shown, the present invention provides a mildew-proof putty powder production equipment and a preparation process thereof, including a pretreatment module, a multi-stage mixing system, a mildew-proof agent precision adding device, a dynamic drying module, a screening and packaging module, a screw conveyor 3, a double-gate sealing valve 4, and an equipment bracket 20. The pretreatment module adopts a rotary drum dryer;

[0042] The multi-stage mixing system includes a high-speed shear mixer 1 and a low-speed planetary mixer 2. The high-speed shear mixer 1 and the low-speed planetary mixer 2 are connected by a screw conveyor 3 to realize material transportation. The high-speed shear mixer 1 and the low-speed planetary mixer 2 form a mixing chamber.

[0043] A radar level meter 12 is installed at the inlet of the low-speed planetary mixer 2 to provide real-time feedback on the material filling amount, dynamically adjust the conveying speed, monitor vacuum fluctuations, automatically compensate for nitrogen flow, and maintain system stability;

[0044] The precise adding device of the mildewcide comprises a metering pump 5, an ultrasonic atomizer 6, and a mildewcide storage tank 7. The mildewcide storage tank 7 is provided with a material valve. The two ends of the metering pump 5 are respectively connected to the ultrasonic atomizer 6 and the mildewcide storage tank 7. The ultrasonic atomizer 6 is connected to the low-speed planetary mixer 2.

[0045] The precise adding device of the mildew inhibitor is equipped with a nitrogen protection module, which includes a liquid nitrogen storage tank 8, an air-temperature vaporizer 9, a solenoid valve 10, and a one-way valve 11. The liquid nitrogen storage tank 8 and the air-temperature vaporizer 9 are both equipped with a solenoid valve 10. The liquid nitrogen storage tank 8, the air-temperature vaporizer 9, and the one-way valve 11 are connected in sequence. The one-way valve 11 is connected to the low-speed planetary mixer 2.

[0046] The dynamic drying module uses a double spiral dryer 17;

[0047] The screening and packaging module includes an 80-mesh vibrating screen 18 and an aluminum film moisture-proof bag 19;

[0048] The equipment support 20 bears the weight of each equipment component. The equipment support 20 is provided with multiple equipment layers and is equipped with an inspection ladder 21.

[0049] Preferably, the multi-stage mixing system is equipped with a vacuum holding module, which includes a vacuum pump 13, a pump body filter 14, and a vacuum negative pressure gauge 16. The vacuum pump 13 is connected to the low-speed planetary mixer 2 through the pump body filter 14. The vacuum pump 13 is equipped with an air storage tank 15, and the vacuum negative pressure gauge 16 is installed on the low-speed planetary mixer 2.

[0050] Preferably, the twin-spiral dryer 17 is equipped with a temperature and humidity sensor and a PID controller. The twin-spiral dryer 17 is connected to the low-speed planetary mixer 2. The twin-spiral dryer 17 can dynamically dry the material under the action of spiral drive and hot air. The hot air enters from the top and penetrates the gap between the materials. The moisture is discharged from the bottom through negative pressure to achieve rapid and uniform drying. For example, the moisture content is ≤0.05%. The temperature is controlled in sections by the PID controller and maintained at 40-60°C to avoid destroying the active ingredients of the mildew inhibitor while also having a high-temperature sterilization function.

[0051] Preferably, the connection points between the twin-screw dryer 17 , the low-speed planetary mixer 2 and the 80-mesh vibrating screen 18 are all provided with double-gate sealing valves 4 .

[0052] As a preferred embodiment of the present invention, Figure 3 As shown:

[0053] Take the production of mildew-proof putty powder with the following raw material ratio as an example: white cement 35%, lime powder 15%, heavy calcium powder 46%, isothiazolinone 0.5%, hydroxypropyl methylcellulose 0.3%, redispersible latex powder 2%, wood fiber 1%, and water repellent 0.2%;

[0054] S1, base material pretreatment, white cement and lime powder are dried at 105°C to a moisture content of less than 0.5% in a rotary drum dryer. The rotary drum dryer is equipped with a microwave moisture meter to monitor the drying process in real time;

[0055] S2, initial mixing, the dry base material and heavy calcium powder are put into the high-speed shear mixer 1 in proportion, and mixed at 1200 rpm for 3 minutes. The high-speed shear mixer 1 is equipped with a zigzag dispersing disk, which rotates at 1200 rpm to crush the powder agglomerates to a particle size of less than 100 μm. PTFE anti-stick coating is sprayed to reduce the adhesion of the inner wall;

[0056] S3, adding the mildew inhibitor. The ultrasonic atomizer 5 is used to evenly spray the 0.3-0.5% isothiazolinone mildew inhibitor in the mildew inhibitor storage tank 7 into the high-speed shear mixer 1. The mildew inhibitor is atomized into particles with a diameter of 10-50 μm. Nitrogen protection is introduced during the addition process. The air-temperature vaporizer 9 converts the liquid nitrogen in the liquid nitrogen storage tank 8 into nitrogen gas. The nitrogen gas is introduced into the high-speed shear mixer 1 through a one-way valve 11. The nitrogen purity is ≥99.9%, thereby preventing the material from being oxidized or damp.

[0057] S4, final mixing and modification, after the primary mixing is completed, the materials are transferred to the low-speed planetary mixer 2 through the screw conveyor 3. The low-speed planetary mixer 2 is equipped with planetary blades. The gap between the planetary blades and the barrel wall is ≤2mm, and the wall is scraped for self-cleaning. The stirring shaft of the low-speed planetary mixer 2 is built with spiral lifting blades to force the material circulation so that the material can be fully mixed. The speed of the low-speed planetary mixer 2 is 15-30rpm. 0.3% hydroxypropyl methylcellulose, 2% redispersible latex powder, 1% wood fiber, and 0.2% water repellent are added in sequence. A vacuum pump 13 creates a vacuum environment of -0.05 to -0.08 MPa, and mixing is carried out in the vacuum environment for 15 minutes. The inner walls of the high-speed shear mixer 1 and the low-speed planetary mixer 2 are provided with a ceramic wear-resistant layer. The screw conveyor 3 has an inclination angle of ≤30° and a screw speed of 20-40 rpm to ensure uniform powder feeding. A double-gate sealing valve 4 is provided at the connection between the screw conveyor 3, the high-speed shear mixer 1, and the low-speed planetary mixer 2 to ensure that the vacuum environment of the low-speed planetary mixer 2, which is -0.05 to -0.08 MPa, is not destroyed;

[0058] S5, dynamic drying, the final mixed material is transferred to the double screw dryer 17, the double screw dryer 17 is connected to the 80 mesh vibrating screen 18 through a hose, and is dried at 50°C and 10% humidity to a moisture content of ≤1.2%;

[0059] S6, sieving and packaging, after passing through 80-mesh vibrating screen 18 for packaging, the 80-mesh vibrating screen 18 uses a linear vibrating screen, and the sieved materials are packaged in aluminum film moisture-proof bags 19.

[0060] It should be noted that, in this document, relational terms such as first and second are used solely to distinguish one entity or operation from another, and do not necessarily require or imply any actual relationship or order between these entities or operations. Matters not described in detail in this specification are well known to those skilled in the art.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A mildew-proof putty powder production equipment, comprising a pretreatment module, a multi-stage mixing system, a mildew-proof agent precision adding device, a dynamic drying module, a screening and packaging module, a screw conveyor (3), a double-gate sealing valve (4), and an equipment bracket (20), characterized in that: The pre-treatment module adopts a rotary drum dryer; The multi-stage mixing system comprises a high-speed shear mixer (1) and a low-speed planetary mixer (2), wherein material transportation is achieved between the high-speed shear mixer (1) and the low-speed planetary mixer (2) via a screw conveyor (3), and the high-speed shear mixer (1) and the low-speed planetary mixer (2) form a mixing chamber; The mold inhibitor precise addition device comprises a metering pump (5), an ultrasonic atomizer (6), and a mold inhibitor storage tank (7), wherein both ends of the metering pump (5) are respectively connected to the ultrasonic atomizer (6) and the mold inhibitor storage tank (7), and the ultrasonic atomizer (6) is connected to the low-speed planetary mixer (2); The dynamic drying module adopts a double spiral dryer (17); The screening and packaging module comprises an 80-mesh vibrating screen (18) and an aluminum film moisture-proof bag (19); The equipment bracket (20) bears the weight of each equipment component; The preparation process includes the following steps: S1, base material pretreatment, the base material is pretreated and dried by a rotary drum dryer; S2, initial mixing, putting the dry base material and filler into a high-speed shear mixer (1) in proportion and mixing and stirring; S3, adding the antifungal agent, spraying the antifungal agent in the antifungal agent storage tank (7) uniformly into the high-speed shear mixer (1) through the ultrasonic atomizer (5), and simultaneously introducing nitrogen protection during the adding process, with the nitrogen purity ≥99.9%; S4, final mixing and modification, after the initial mixing is completed, the materials are transferred to the low-speed planetary mixer (2) through the screw conveyor (3), and water-retaining thickener, water-retaining thickener, and water-retaining thickener are added in sequence to create a vacuum environment and mix in the vacuum environment; S5, dynamic drying, the final mixed material is transferred to a double screw dryer (17) and dynamically dried under low temperature conditions; S6, sieving and packaging, after being sieved through an 80-mesh vibrating screen (18), the 80-mesh vibrating screen (18) is a linear vibrating screen, and the sieved material is packaged in an aluminum film moisture-proof bag (19).

2. The mildew-proof putty powder production equipment according to claim 1, characterized in that: The rotary drum dryer is equipped with a microwave moisture meter. The inner walls of the high-speed shear mixer (1) and the low-speed planetary mixer (2) are provided with a ceramic wear-resistant layer. The screw conveyor (3) has an inclination angle of ≤30° and a screw speed of 20-40 rpm.

3. The mildew-proof putty powder production equipment according to claim 2, characterized in that: The high-speed shear mixer (1) is internally provided with a serrated dispersion disk and sprayed with a PTFE anti-stick coating. The low-speed planetary mixer (2) is provided with planetary blades, the clearance between the planetary blades and the barrel wall is ≤2 mm, and the stirring shaft of the low-speed planetary mixer (2) is internally provided with a spiral lifting blade.

4. The mildew-proof putty powder production equipment according to claim 2, characterized in that: Double gate sealing valves (4) are provided at the connection points between the screw conveyor (3), the high-speed shear mixer (1) and the low-speed planetary mixer (2).

5. The mildew-proof putty powder production equipment according to claim 2, characterized in that: A radar level meter (12) is installed at the inlet of the low-speed planetary mixer (2) to provide real-time feedback on the material filling amount.

6. The mildew-proof putty powder production equipment according to claim 1, characterized in that: The mold inhibitor precision adding device is equipped with a nitrogen protection module, which includes a liquid nitrogen storage tank (8), an air-temperature vaporizer (9), a solenoid valve (10), and a one-way valve (11). The liquid nitrogen storage tank (8) and the air-temperature vaporizer (9) are both equipped with a solenoid valve (10). The liquid nitrogen storage tank (8), the air-temperature vaporizer (9), and the one-way valve (11) are connected in sequence, and the one-way valve (11) is connected to the low-speed planetary mixer (2).

7. The mildew-proof putty powder production equipment according to claim 1, characterized in that: The anti-mildew agent storage tank (7) is provided with a material valve, the double-screw dryer (17) is connected to an 80-mesh vibrating screen (18) via a hose, and the equipment support (20) is provided with multiple equipment layers and is equipped with an inspection ladder (21).

8. The mildew-proof putty powder production equipment according to claim 1, characterized in that: The multi-stage mixing system is equipped with a vacuum holding module, which includes a vacuum pump (13), a pump filter (14), and a vacuum negative pressure gauge (16). The vacuum pump (13) is connected to the low-speed planetary mixer (2) through the pump filter (14). The vacuum pump (13) is equipped with an air storage tank (15). The vacuum negative pressure gauge (16) is installed on the low-speed planetary mixer (2).

9. The mildew-proof putty powder production equipment according to claim 1, characterized in that: The double spiral dryer (17) is equipped with a temperature and humidity sensor and a PID controller. The double spiral dryer (17) is connected to the low-speed planetary mixer (2). The double spiral dryer (17) can dynamically dry the material under the action of spiral drive and hot air, and the temperature is controlled in sections by the PID controller.

10. The mildew-proof putty powder production equipment according to claim 9, characterized in that: The connection points between the double-screw dryer (17), the low-speed planetary mixer (2) and the 80-mesh vibrating screen (18) are all equipped with double-gate sealing valves (4).

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