Nano calcium carbonate drying device
By adopting the combination of heating boards and feeding mechanisms in nano -carbonate dryers, the problem of material drop and low calorie utilities in the existing dryer in the existing dryer achieve the effect of low energy consumption, convenient use and high drying efficiency.
Patent Information
- Application Number
- CN202420325220.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-21
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-02-21
AI Technical Summary
Materials are often attached to the conveyor belt of existing nano calcium carbonate dryers, resulting in a reduced heat dissipation speed of the heater, low heat utilization rate, large energy consumption, and material drops and builds up, which requires regular cleaning, which is inconvenient to use.
The combination of heating boards and feeding agencies, the material is directly moved and heated directly on the heating plate, the heat utilization rate is high, and energy consumption is reduced. Promote the material movement by the replacement of the feeding mechanism of the feeding mechanism to avoid the drop of materials, simplify the cleaning process, and improve the convenience of use.
The effect of low energy consumption, convenient use and high drying efficiency, reducing the energy consumption and cleaning of the dryer, and improving dry efficiency.
Smart Images
Figure CN222418447U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of nano calcium carbonate, in particular to a nano calcium carbonate drying device. Background Art
[0002] The existing preparation process of nano calcium carbonate includes: first, a screening process, crushing the limestone transported from the mine, and then screening out particles of suitable size; second, a calcining process, putting the limestone particles of suitable size into a rotary kiln for calcining to obtain quicklime; third, a digestion process, adding water to the quicklime for digestion to obtain calcium hydroxide emulsion; fourth, a carbonization process, reacting the calcium hydroxide emulsion with carbon dioxide to obtain calcium carbonate slurry, and in the carbonization process, nanometer-scale calcium carbonate particles are generated by controlling the reaction conditions (temperature, pH, etc.); fifth, a dehydration process, mainly using centrifugal equipment to remove most of the water in the calcium carbonate slurry; sixth, a drying process, after the calcium carbonate slurry is dehydrated, it is heated in a dryer to further reduce the water content of the calcium carbonate; seventh, a crushing process, the dried calcium carbonate is processed by a crushing device to obtain the final product.
[0003] The structure of the existing dryer used in the drying process includes a long strip drying box, a feed port is provided at one end of the drying box, a discharge port is provided at the other end of the drying box, a belt conveyor is provided inside the drying box, a heater is provided below the conveyor, and the material enters the conveyor from the feed port, is transmitted by the conveyor, and is discharged from the discharge port. The heat generated by the heater increases the temperature inside the drying box (mainly concentrated in the middle), so that the material is dried. During use, it is found that the conveyor belt often adheres to the material, and the material is transferred to the bottom of the conveyor as the belt rotates, and falls onto the heater, covering the heater, reducing the heat dissipation speed of the heater, and the distance between the heater and the material on the conveyor is large, and the heat is transmitted by air, so the heat utilization rate is low and the energy consumption is large. In addition, the material dropped from the belt will form an accumulation in the drying box, which needs to be cleaned regularly, and the internal space of the drying box is small, and the cleaning is difficult, which makes the dryer inconvenient to use. Utility Model Content
[0004] The purpose of the utility model is to provide a nano calcium carbonate drying device, which has the advantages of low energy consumption, convenient use and high drying efficiency.
[0005] The technical solution of the utility model is as follows: a nano calcium carbonate drying device comprises a long strip drying box, a feeding port is arranged at the top of one end of the drying box, a discharging port is arranged on the end surface of the other end of the drying box, a heating plate is arranged in the drying box, a heating unit is arranged in the heating plate, a feeding trough is arranged on the top surface of the heating plate, a discharging plate with a U-shaped cross section is arranged at one end of the heating plate, the discharging plate obliquely passes through the discharging port downward, and a feeding mechanism is arranged on the upper side of the heating plate.
[0006] In the aforementioned nano-calcium carbonate drying device, the feeding mechanism includes slide rails respectively located on both sides of the heating plate, a plurality of push plates distributed along the length of the feeding trough are arranged between the two slide rails, a slider is arranged between the slide rails and the push plate, the slider is rotatably connected to the push plate, a stopper fixed to the slider is arranged on one side of the push plate, the stopper is located on the lower side of the rotating shaft between the slider and the push plate, a connecting rod is arranged between adjacent sliders on the same slide rail, a telescopic cylinder is arranged on the outside of the drying box, a push beam is arranged at the telescopic end of the telescopic cylinder, and the two ends of the push beam are respectively connected to any one of the sliders on the two slide rails.
[0007] In the aforementioned nano-calcium carbonate drying device, a plurality of moisture discharge holes are provided on the top of the drying box, and the moisture discharge holes are covered with water-absorbent cloth.
[0008] In the aforementioned nano-calcium carbonate drying device, the heating unit includes a repeatedly bent water channel located in the heating plate, both ends of the water channel are on the side walls of the heating plate, a water heat exchanger is provided on the outside of the drying box, one end of the water channel is connected to the inlet of the water heat exchanger through a water pump, and the other end of the water channel is connected to the outlet of the water heat exchanger.
[0009] In the aforementioned nano-calcium carbonate drying device, the heating unit further comprises a plurality of groups of electric heating tubes all located in the heating plate.
[0010] Compared with the existing technology, on the basis of the existing dryer, the belt conveyor in the existing dryer is replaced by a combination of a heating plate and a feeding mechanism. The material moves directly on the heating plate and is directly heated, which has a high heat utilization rate and reduces energy consumption. The material is pushed and moved by multiple reciprocating pusher plates. On the basis of retaining the continuous drying function of the existing dryer, the material will not fall to the bottom of the drying box, and there is no need for regular cleaning, making the dryer easy to use.
[0011] In addition, by providing moisture discharge holes on the drying box and covering the moisture discharge holes with cloth, the air humidity in the drying box is reduced and the drying efficiency is improved on the basis of reducing the loss of hot air and heat loss in the drying box. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the front view structure of the dryer.
[0013] Figure 2 yes Figure 2 Enlarged view at A.
[0014] The markings in the accompanying drawings are: 200-drying box, 201-feed port, 202-discharge port, 203-heating plate, 204-feeding trough, 205-discharge plate, 206-slide rail, 207-push plate, 208-slider, 209-stopper, 210-connecting rod, 211-telescopic cylinder, 212-push beam, 213-water channel, 214-moisture discharge hole, 215-cloth, 216-electric heating tube. DETAILED DESCRIPTION
[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.
[0016] Embodiment. A nano calcium carbonate drying device includes a long strip drying box 200, a plurality of moisture discharge holes 214 are provided on the top of the drying box 200, and the moisture discharge holes 214 are covered with a water-absorbent cloth 215. The cloth plays a role in moisture permeability and moisture removal, but avoids the loss of hot air inside the drying box 200, thereby reducing energy consumption.
[0017] A feed port 201 is provided at the top of the left end of the drying box 200, a discharge port 202 is provided on the end surface of the right end of the drying box 200, a heating plate 203 is provided inside the drying box 200, a plurality of supporting legs are provided at the bottom of the heating plate 203, a heating unit is provided inside the heating plate 203, a feed trough 204 is provided on the top surface of the heating plate 203, the cross section of the feed trough 204 is an isosceles trapezoid of a smaller size than the upper one, the left end of the feed trough 204 is closed to prevent the material from overflowing from the left end of the feed trough 204, a discharge plate 205 with a U-shaped cross section is provided at the right end of the heating plate 203, the discharge plate 205 is tilted downward through the discharge port 202, and a feeding mechanism is provided on the upper side of the heating plate 203.
[0018] The feeding mechanism includes slide rails 206 respectively located on both sides of the heating plate 203 in the width direction, the slide rails 206 are fixed in the drying box 200, a plurality of push plates 207 distributed along the length direction of the feeding trough 204 are arranged between the two slide rails 206, the push plate 207 cooperates with the feeding trough 204, a slider 208 is arranged between the slide rail 206 and the push plate 207, the slider 208 is rotatably connected with the push plate 207, a stopper 209 fixed to the slider 208 is arranged on the left side of the push plate 207, the stopper 209 is located on the lower side of the rotating shaft between the slider 208 and the push plate 207, a connecting rod 210 is arranged between adjacent sliders 208 located on the same slide rail 206, a telescopic cylinder 211 is arranged on the outside of the drying box 200, the telescopic cylinder 211 is a gas cylinder or an oil cylinder, a push beam 212 is arranged at the telescopic end of the telescopic cylinder 211, and the two ends of the push beam 212 are respectively connected to the leftmost slider 208 on the two slide rails 206.
[0019] The heating unit includes a repeatedly bent water channel 213 located in the heating plate 203, both ends of the water channel 213 are on the side wall of the heating plate 203, and a water heat exchanger is provided on the outside of the drying box 200. One end of the water channel 213 is connected to the outlet of the water heat exchanger through a water pump, and the other end of the water channel 213 is connected to the inlet of the water heat exchanger. The hot water produced by the water heat exchanger enters the water channel 213, so that the heating plate 203 is heated and the calcium carbonate slurry is dried. After the hot water is cooled, it is driven back to the water heat exchanger by the water pump and reheated. The water heat exchanger can be set on the smoke pipe of the kiln used in the calcining process, and the material on the heating plate 203 is dried by the waste heat of the flue gas.
[0020] The heating unit further includes a plurality of groups of electric heating tubes 216 located in the heating plate 203. A large distance should be maintained between the electric heating tubes 216 and the water channel 213 to prevent the heat generated by the electric heating tubes 216 from being absorbed and carried away by the water in the water channel 213. The electric heating tubes 216 are concentrated in the middle of the heating plate 203. When the hot water generated by the water heat exchanger is not enough to dry the calcium carbonate slurry, the electric heating tubes 216 are activated to dry the material on the heating plate 203.
[0021] Working principle of the dryer: The calcium carbonate slurry is continuously transported from the feed port 201 to the feed trough 204 by a pump. When the telescopic cylinder 211 is extended, the corresponding slider 208 is pushed to the right by the push beam 212. Since a connecting rod 210 is provided between adjacent sliders 208, all sliders 208 move to the right synchronously, driving all push plates 207 to move to the right. Restricted by the block 209, the push plates 207 remain vertical, flipping the material to the right. When the telescopic cylinder 211 contracts, the lower end of the push plate 207 is affected by the material resistance and flipped, and the calcium carbonate slurry is flattened to maintain a large evaporation area. Under the repetitive extension and contraction of the telescopic cylinder 211, the material is dried and discharged from the discharge plate 205. The repetitive extension and contraction of the telescopic cylinder 211 can be realized by the existing control system, and many telescopic cylinder manufacturers will also have matching products for sale.
[0022] In the description of the embodiments, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation.
Claims
1. A nano calcium carbonate drying device, comprising a strip-shaped drying box (200), characterized in that: A feed port (201) is provided at the top of one end of the drying box (200), a discharge port (202) is provided on the end surface of the other end of the drying box (200), a heating plate (203) is provided inside the drying box (200), a heating unit is provided inside the heating plate (203), a feeding trough (204) is provided on the top surface of the heating plate (203), a discharge plate (205) with a U-shaped cross section is provided at one end of the heating plate (203), the discharge plate (205) passes through the discharge port (202) in an inclined manner downward, and a feeding mechanism is provided on the upper side of the heating plate (203).
2. The nano calcium carbonate drying device according to claim 1, characterized in that: The feeding mechanism comprises slide rails (206) respectively located on both sides of the heating plate (203); a plurality of push plates (207) distributed along the length of the feeding trough (204) are arranged between the two slide rails (206); a slider (208) is arranged between the slide rails (206) and the push plate (207); the slider (208) is rotatably connected to the push plate (207); a stopper (209) fixed to the slider (208) is arranged on one side of the push plate (207); (209) is located at the lower side of the rotating shaft between the slider (208) and the push plate (207), a connecting rod (210) is provided between adjacent sliders (208) on the same slide rail (206), a telescopic cylinder (211) is provided on the outer side of the drying box (200), a push beam (212) is provided at the telescopic end of the telescopic cylinder (211), and the two ends of the push beam (212) are respectively connected to any one of the sliders (208) on the two slide rails (206).
3. The nano calcium carbonate drying device according to claim 1, characterized in that: The top of the drying box (200) is provided with a plurality of moisture discharge holes (214), and the moisture discharge holes (214) are covered with water-absorbent cloth (215).
4. The nano calcium carbonate drying device according to claim 1, characterized in that: The heating unit comprises a repeatedly bent water channel (213) located in the heating plate (203), both ends of the water channel (213) are on the side wall of the heating plate (203), a water heat exchanger is arranged on the outside of the drying box (200), one end of the water channel (213) is connected to the inlet of the water heat exchanger through a water pump, and the other end of the water channel (213) is connected to the outlet of the water heat exchanger.
5. The nano calcium carbonate drying device according to claim 4, characterized in that: The heating unit further comprises a plurality of groups of electric heating tubes (216) all located inside the heating plate (203).