Drying and crushing equipment for high-humidity materials

Abstract

Drying and crushing equipment for high-humidity materials relates to the technical field of material drying and is composed of a plurality of functional equipment units. Comprising a strip extruding and distributing device, a layer type dryer, a discharging auger, a bucket elevator, a stock bin, a feeding auger, a hot air mixing pipe, a wind type pulverizer, an air purifier, a heat exchanger, a winnowing machine, a cloth bag collector, an induced draft fan, a stirrer and a closed wind discharging device. The fusion layer type drying main body completes a first-stage heat conduction constant-speed drying process of converting high-humidity materials into semi-dry materials, the fusion hot air flow drying main body completes a second-stage convection speed reduction drying process of converting the semi-dry materials into dry materials, and the wind type pulverizer main body is adopted to complete a dry powder material collecting process. The problems of drying and crushing of high-humidity materials are perfectly solved, the drying efficiency is greatly improved, and the drying cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of material drying, in particular to a drying and crushing device for high-humidity materials. Background Art

[0002] High-humidity materials refer to materials with a moisture content of more than 70%. The bulk density of the products is small, the viscosity of the wet materials is large, the fluidity is poor, and the drying is difficult. For example: light magnesium carbonate, white carbon black, magnesium hydroxide, urban sludge, etc. Because such materials have high humidity, large volume, poor thermal conductivity, high drying energy consumption, and high drying costs. Therefore, the selection of drying methods for high-humidity materials is particularly important.

[0003] Material drying is the process of evaporating water (or solvent) using a heat source. There are three ways to transfer heat energy: one is heat conduction heat exchange, the second is convection heat exchange, and the third is radiation heat exchange. Commonly used conduction heat exchange drying equipment includes layer dryers, disc dryers, paddle dryers, tube speed dryers, etc.; commonly used convection heat exchange drying equipment includes flash dryers, vibrating fluidized bed dryers, spray dryers, mesh belt flow dryers, air flow dryers, etc. Commonly used radiation heat exchange drying equipment includes far infrared dryers, electromagnetic dryers, etc.

[0004] Each drying method and drying equipment has its advantages and disadvantages. For drying high-humidity materials, if heat conduction drying is used, the drying speed is very fast during the isotropic drying stage when the moisture content of the material drops from 80% to 20%. However, during the deceleration drying stage, as the thermal conductivity of the material becomes worse and worse, the heat conduction efficiency decreases, the drying speed becomes lower and lower, and it becomes unsuitable for drying semi-dry materials below 20%. If convection drying is used, due to the high moisture content of high-humidity materials, the corresponding hot air volume increases, which not only increases the energy consumption of drying operation, but also due to the requirements of gas-solid separation and dust removal at the end, the dehumidification air cannot be lower than the dew point (generally above 120°C), which will cause a large amount of heat energy to be emptied and wasted. Convection drying is not suitable for drying high-humidity materials.

[0005] Therefore, it is imperative for the advancement of existing technology to combine the advantages of heat conduction and convection heat transfer with the characteristics of high-humidity materials, innovate drying equipment suitable for the operation of high-humidity materials, and solve the problems of drying and crushing high-humidity materials without increasing the burden of drying costs. Summary of the invention

[0006] The utility model aims to provide a drying and crushing equipment for high-humidity materials, which integrates the equipment composition of the first-level heat conduction constant-speed drying, the second-level convection speed reduction drying and the crushing and collecting integrated mode.

[0007] In order to achieve the above-mentioned invention object, the utility model provides a drying and crushing equipment for high-humidity materials, which is composed of several functional equipment units, including an extrusion distributor, a layer dryer, a discharging auger, a bucket elevator, a silo, a feeding auger, a hot air mixing pipe, a wind pulverizer, an air purifier, a heat exchanger, a wind separator, a bag receiver, an induced draft fan, a stirrer, and a closed air discharging device.

[0008] The extruded strip distributor comprises a feed port and a discharge port. The high-humidity material enters from the feed port, is squeezed and formed by the extruded strip distributor, and is distributed on the drying plate of the layer dryer from the discharge port that closely matches the feed port of the layer dryer.

[0009] The layer dryer comprises a feed inlet and a discharge inlet, wherein the feed inlet closely matches the discharge inlet of the extruded strip distributor;

[0010] The discharging auger comprises a feed port and a discharge port, and the feed port is closely matched with the discharge port of the layer dryer;

[0011] The bucket elevator comprises a feed port and a discharge port, wherein the feed port is closely matched with the discharge port of the discharge auger;

[0012] The silo includes a feed port and a discharge port, and the feed port is closely matched with the discharge port of the bucket elevator;

[0013] The feeding auger comprises a feed port and a discharge port, and the feed port is closely matched with the discharge port of the silo;

[0014] The hot air mixing pipe includes a hot air inlet, a hot air outlet, a semi-dry material feed port and a coarse material return port. The hot air inlet is closely matched with the hot air outlet of the heat exchanger; the hot air outlet is closely matched with the feed port of the wind mill; the semi-dry material feed port is closely matched with the discharge port of the feeding auger; the coarse material return port is closely matched with the coarse material air lock outlet of the separator;

[0015] The air purifier includes an air inlet and a purified air outlet. Correspondingly, the heat exchanger includes a purified air inlet and a hot air outlet. The purified air outlet of the air purifier closely matches the purified air inlet of the heat exchanger; the hot air outlet of the heat exchanger closely matches the hot air inlet of the hot air mixing pipe.

[0016] The wind-type pulverizer includes a feed port and a discharge port, wherein the feed port closely matches the hot air outlet of the hot air mixing pipe;

[0017] The air separator includes an air inlet, an air outlet and a coarse material air lock outlet, wherein the air inlet closely matches the material discharge outlet of the pneumatic pulverizer; the air outlet closely matches the air inlet of the bag collector; the coarse material air lock outlet closely matches the coarse material return outlet of the hot air mixing pipe;

[0018] The bag collector also includes an air outlet and a dry powder outlet, wherein the air outlet closely matches the air inlet of the induced draft fan; and the dry powder outlet matches the material inlet end of the agitator;

[0019] The agitator also includes a material outlet end, which matches the inner cavity end of the air-blocking discharger;

[0020] The air-tight discharger also includes a discharge port, and the dried finished product is obtained from the discharge port.

[0021] Preferably, the heat exchanger adopts a fin heat exchanger structure mechanism which is more suitable for the operation of the drying and crushing equipment for high-humidity materials of the utility model.

[0022] Compared with the prior art, the beneficial effects of the utility model are embodied in:

[0023] The utility model provides a drying and crushing equipment for high-humidity materials, which integrates heat conduction heat exchange and convection heat exchange. In order to solve the technical problems of high-humidity materials with high viscosity, poor fluidity, poor thermal conductivity in a single state, and high drying energy consumption, the utility model integrates a layered drying body to complete the primary heat conduction isospeed drying process of converting high-humidity materials into semi-dry materials, and integrates a hot air flow drying body to complete the secondary convection speed reduction drying process of converting semi-dry materials into dry materials. At the same time, the airflow advantage of the equipment itself is utilized to adopt a wind-type pulverizer body to complete the dry powder material collection process. The process of changing the moisture content of high-humidity materials from high to low is matched with the efficient matching of the dynamic heat exchange method, which not only perfectly solves the drying and crushing problems of high-humidity materials, but also greatly improves the drying efficiency and reduces the drying cost. The equipment is reasonably designed and suitable for automated operation and processing of high-humidity materials in various states. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] FIG1 is a schematic diagram of a drying and pulverizing equipment for high-humidity materials provided by the present invention.

[0026] In the attached figure

[0027] 1-strip feeder, 2-layer dryer, 3-discharging auger, 4-bucket elevator, 5-bin, 6-feeding auger, 7-hot air mixing pipe, 8-air purifier, 9-fin heat exchanger, 10-wind crusher, 11-wind separator, 12-bag receiver, 13-induced draft fan, 14-mixer, 15-closed air discharger. DETAILED DESCRIPTION

[0028] Example 1: Figure 1 ,

[0029] The utility model provides a drying and crushing equipment for high-humidity materials, which is composed of a plurality of functional equipment units, including an extruded material distributor (1), a layer dryer (2), a discharging auger (3), a bucket elevator (4), a silo (5), a feeding auger (6), a hot air mixing pipe (7), an air purifier (8), a fin heat exchanger (9), a pneumatic pulverizer (10), a pneumatic separator (11), a bag material collector (12), an induced draft fan (13), a stirrer (14), and a closed air discharging device (15).

[0030] The extruded strip distributor (1) comprises a feed inlet and a discharge outlet. The high-humidity material enters from the feed inlet, is squeezed and shaped by the extruded strip distributor (1), and is then distributed on the drying plate of the layer dryer (2) from the discharge outlet that closely matches the feed inlet of the layer dryer (2).

[0031] The layer dryer (2) comprises a feed inlet and a discharge inlet, wherein the feed inlet closely matches the discharge inlet of the extruded strip distributor (1);

[0032] The discharging augers (3) include a feed port and a discharge port, and the feed port is closely matched with the discharge port of the layer dryer (2);

[0033] The bucket elevator (4) comprises a feed port and a discharge port, wherein the feed port is closely matched with the discharge port of the discharge auger (3);

[0034] The silo (5) comprises a feed port and a discharge port, wherein the feed port closely matches the discharge port of the bucket elevator (4);

[0035] The feeding auger (6) comprises a feed inlet and a discharge outlet, and the feed inlet is closely matched with the discharge outlet of the silo (5);

[0036] The hot air mixing pipe (7) comprises a hot air inlet, a hot air outlet, a semi-dry material feed port and a coarse material return port, wherein the hot air inlet closely matches the hot air outlet of the fin heat exchanger (9); the hot air outlet closely matches the feed port of the wind pulverizer (10); the semi-dry material feed port closely matches the discharge port of the feeding auger (6); and the coarse material return port closely matches the coarse material air shut-off port of the air separator (11);

[0037] The air purifier (8) includes an air inlet and a purified air outlet. Correspondingly, the fin heat exchanger includes a purified air inlet and a hot air outlet. The purified air outlet of the air purifier (8) closely matches the purified air inlet of the fin heat exchanger (9); the hot air outlet of the fin heat exchanger (9) closely matches the hot air inlet of the hot air mixing pipe (7).

[0038] The wind-type pulverizer (10) comprises a feed port and a discharge port, wherein the feed port closely matches the hot air outlet of the hot air mixing pipe (7);

[0039] The air separator (11) comprises an air inlet, an air outlet and a coarse material air lock outlet, wherein the air inlet closely matches the material discharge outlet of the pneumatic pulverizer (10); the air outlet closely matches the air inlet of the bag collector (12); the coarse material air lock outlet closely matches the coarse material return outlet of the hot air mixing pipe (7);

[0040] The bag collector (12) further comprises an air outlet and a dry powder outlet, wherein the air outlet closely matches the air inlet of the induced draft fan (13); and the dry powder outlet matches the material inlet end of the agitator (14);

[0041] The agitator (14) also includes a material outlet end, which matches the inner cavity end of the air-blocking discharger (15);

[0042] The air-tight discharge device (15) also includes a discharge port, and the dried finished product is obtained from the discharge port.

Claims

1. A drying and pulverizing equipment for high-humidity materials, comprising a plurality of functional equipment units, including an extrusion distributor (1), a layer dryer (2), a discharging auger (3), a bucket elevator (4), a silo (5), a feeding auger (6), a hot air mixing pipe (7), an air purifier (8), a heat exchanger (9), a pneumatic pulverizer (10), an air separator (11), a bag receiver (12), an induced draft fan (13), a stirrer (14), and a closed air discharging device (15), characterized in that: The extruded strip distributor (1) comprises a feed inlet and a discharge outlet. The high-humidity material enters from the feed inlet, is squeezed and shaped by the extruded strip distributor (1), and is then distributed on the drying plate of the layer dryer (2) from the discharge outlet that closely matches the feed inlet of the layer dryer (2). The layer dryer (2) comprises a feed inlet and a discharge inlet, wherein the feed inlet closely matches the discharge inlet of the extruded strip distributor (1); The discharging augers (3) include a feed port and a discharge port, and the feed port is closely matched with the discharge port of the layer dryer (2); The bucket elevator (4) comprises a feed port and a discharge port, wherein the feed port is closely matched with the discharge port of the discharge auger (3); The silo (5) comprises a feed port and a discharge port, wherein the feed port closely matches the discharge port of the bucket elevator (4); The feeding auger (6) comprises a feed inlet and a discharge outlet, and the feed inlet is closely matched with the discharge outlet of the silo (5); The hot air mixing pipe (7) comprises a hot air inlet, a hot air outlet, a semi-dry material feed port and a coarse material return port, wherein the hot air inlet closely matches the hot air outlet of the heat exchanger (9); the hot air outlet closely matches the feed port of the wind mill (10); the semi-dry material feed port closely matches the discharge port of the feeding auger (6); and the coarse material return port closely matches the coarse material air shut-off port of the air separator (11); The air purifier (8) includes an air inlet and a purified air outlet. Correspondingly, the heat exchanger includes a purified air inlet and a hot air outlet. The purified air outlet of the air purifier (8) closely matches the purified air inlet of the heat exchanger (9); the hot air outlet of the heat exchanger (9) closely matches the hot air inlet of the hot air mixing pipe (7). The wind-type pulverizer (10) comprises a feed port and a discharge port, wherein the feed port closely matches the hot air outlet of the hot air mixing pipe (7); The air separator (11) comprises an air inlet, an air outlet and a coarse material air lock outlet, wherein the air inlet closely matches the material discharge outlet of the pneumatic pulverizer (10); the air outlet closely matches the air inlet of the bag collector (12); the coarse material air lock outlet closely matches the coarse material return outlet of the hot air mixing pipe (7); The bag collector (12) further comprises an air outlet and a dry powder outlet, wherein the air outlet closely matches the air inlet of the induced draft fan (13); and the dry powder outlet matches the material inlet end of the agitator (14); The agitator (14) also includes a material outlet end, which matches the inner cavity end of the air-blocking discharger (15); The air-tight discharge device (15) also includes a discharge port, and the dried finished product is obtained from the discharge port.

2. The drying and crushing equipment for high-humidity materials according to claim 1, characterized in that: The heat exchanger (9) is a fin heat exchanger.

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