Alkali fiber cooling device

Abstract

The utility model relates to an alkali fiber cooling device which comprises an air inlet chamber, an air outlet chamber, a fin heat exchanger, a dehydrator, an air inlet duct, a circulating fan, an air outlet duct, an air distribution plate, a cooling bin, a cooling device body, a fiber filter, an exhaust pipe and an exhaust fan. A separating wall is arranged between the air inlet chamber and the air outlet chamber, and the fiber filter comprises a three-dimensional filter screen cover, a plurality of filter units installed at the top of the three-dimensional filter screen cover at intervals and a control unit. The alkali fiber cooling device overcomes the defects that the cleaning period of an alkali fiber cooler is shortened due to the fact that fine alkali fiber dust blocks a heat exchanger, and energy consumption is increased due to the fact that hot air and cold air are mixed together easily in existing alkali fiber cooling equipment. By adopting the design mode of the fiber filter and the separating wall arranged between the air inlet chamber and the air outlet chamber, the alkali fiber cooler has the advantages of prolonging the cleaning period of the alkali fiber cooler, effectively reducing the energy consumption and saving the cost.

Description

TECHNICAL FIELD

[0001] The alkali fiber cooling device relates to the field of alkali fiber production. BACKGROUND

[0002] The viscose preparation process of a viscose fiber factory mainly includes the process steps of dipping, pressing, crushing, aging, yellowing, dissolving, filtering, defoaming, and ripening. The alkali cellulose (referred to as alkali fiber) prepared from pulp raw materials after dipping, pressing, and crushing needs to pass through an aging drum to reduce the polymerization degree to a relatively uniform degree. The alkali fiber after reduction needs to be cooled by a cooling device to meet the temperature requirements of the subsequent yellowing section.

[0003] A domestic patent ZL201120345454.4 discloses an alkali cellulose cooler, which includes a rack, a fan, an air inlet box, a cooling bed, a fiber filter, an air collecting chamber, a heat exchanger, a water trap, and an air return box to solve the problems of insufficient production capacity and structural defects. However, this patent has the problems of small alkali fiber dust blocking the heat exchanger, shortening the cleaning cycle of the alkali fiber cooler, and hot air and cold air mixing together to increase energy consumption.

[0004] Therefore, it is urgent to provide an alkali fiber cooling device that can prolong the cleaning cycle of the alkali fiber cooler, effectively reduce energy consumption, and save costs. SUMMARY

[0005] To overcome the problems of small alkali fiber dust blocking the heat exchanger, shortening the cleaning cycle of the alkali fiber cooler, and hot air and cold air mixing together to increase energy consumption, the present application provides an alkali fiber cooling device that adopts a design consisting of a fiber filter and a partition wall arranged between the air inlet chamber and the air outlet chamber. The device has the advantages of prolonging the cleaning cycle of the alkali fiber cooler, effectively reducing energy consumption, and saving costs.

[0006] The technical solution of the present application is as follows:

[0007] The alkali fiber cooling device comprises an air inlet chamber, an air outlet chamber, a fin heat exchanger, a water separator, an air inlet duct, a circulating fan, an air outlet duct, a air distribution plate, a cooling bin, a cooling device, a fiber filter, an exhaust pipe and an exhaust fan; an isolation wall is arranged between the air inlet chamber and the air outlet chamber, the air outlet of the air inlet chamber, the air inlet duct, the circulating fan, the air outlet duct, the air distribution plate, the cooling bin and the air inlet of the air outlet chamber are sequentially connected, an air inlet is formed in the side wall of the air inlet chamber, the fin heat exchanger is arranged at the air outlet of the air inlet chamber, the water separator is arranged outside the air inlet chamber, one end of the air inlet of the water separator is communicated with the air outlet of the fin heat exchanger, and one end of the air outlet is communicated with the air inlet of the air inlet duct; the fiber filter is arranged in the air outlet chamber, the exhaust fan is arranged on the air outlet of the air outlet chamber and communicated with the inner cavity of the air outlet chamber through the exhaust pipe; the fiber filter comprises a three-dimensional filter screen cover, a plurality of filter units which are arranged at the top of the three-dimensional filter screen cover and a control unit; the cooling device is arranged in the cooling bin, the bottom of the three-dimensional filter screen cover is communicated with the air outlet of the cooling bin, the surrounding wall is a filter screen, and a plurality of mounting holes are arranged on the top wall in a spaced manner; each filter unit comprises a filter cartridge which is open at the top, has a side wall and a closed bottom and a compressed air nozzle which is arranged above the filter cartridge and faces the center of the bottom wall of the filter cartridge, and the filter cartridge of each filter unit is arranged in a mounting hole and extends into the inner cavity of the three-dimensional filter screen cover.

[0008] The alkali fiber cooling device of the application adopts a design mode composed of the fiber filter and the isolation wall arranged between the air inlet chamber and the air outlet chamber, has the advantages of prolonging the cleaning period of the alkali fiber cooler, effectively reducing energy consumption and saving cost. By arranging the isolation wall, the design mode of separating the natural air area (air inlet chamber) from the hot air area (air outlet chamber) is adopted, so that the increase of energy consumption caused by the hot air from the cooling bin entering the air inlet chamber is avoided, and the advantages of energy saving and cost reduction are achieved. The alkali fiber cooling device separates the heat-exchanged hot air and discharges the hot air from the air outlet chamber by the exhaust fan, simultaneously, the natural air is sucked into the fin heat exchanger by the circulating fan for cooling, then the cooled air is sequentially sent into the cooling bin through the water separator, the air inlet duct, the air outlet duct and the air distribution plate, after the alkali fiber enters the cooling bin, the cooling air in the cooling bin fully contacts with the alkali fiber, so that the temperature of the alkali fiber is reduced to the temperature required by the subsequent yellowing process. Then, the temperature of the cooling air after heat exchange is increased, the small alkali fiber in the air is removed by the fiber filter, and the isolation wall is beneficial to avoid the blocking of the fin heat exchanger. The air distribution plate is arranged at the connection between the cooling bin and the air outlet duct to separate the inner cavities of the two, and the fiber filter is arranged on the upper part of the cooling bin. The compressed air nozzle is arranged on the top of each filter cartridge, the air distribution is uniform and stable, the control unit is controlled, the filter cartridge bottom is blown, and the filter screen of the filter cartridge always maintains a good ventilation state. The specially designed fiber filter is beneficial to avoid the adhesion of the alkali fiber to the filter cartridge, prolongs the cleaning period of the alkali fiber cooler, effectively reduces the energy consumption, and greatly saves the cost. The air outlet chamber is provided with the exhaust pipe and the exhaust fan for discharging the hot air.

[0009] The number of filter cartridges is 4-5 per square meter, and the diameter of each filter cartridge is 150-250 mm, and the length is 800-1200 mm. The preferred number and size of filter cartridges are beneficial to improve the filtering effect.

[0010] At least two air supplement openings are arranged on the sidewall of the air inlet channel, and an air supplement filter screen is arranged on each air supplement opening.

[0011] The air supplement openings can solve the problem that when the air inlet of the finned heat exchanger is blocked by foreign matters during the operation of the alkali fiber cooler, the air volume cannot meet the demand of normal production. When the air volume is insufficient, the air supplement openings are opened, which can effectively avoid the reduction of production and has the advantages of improving the yield and saving the cost. The number of air supplement openings can be flexibly selected according to the production demand and the supplemented air volume.

[0012] The number of air supplement openings is two, and the area of each air supplement opening is 300 mm*400 mm.

[0013] The preferred number and area of air supplement openings can meet the demand of alkali fiber cooling.

[0014] An 80-120 mesh air inlet filter screen is movably arranged at the air inlet of the finned heat exchanger.

[0015] The air inlet filter screen can filter dust and particulate matters in the air, thereby reducing the problem that the finned heat exchanger is blocked by tiny matters, prolonging the service life of the finned heat exchanger and reducing the problem that the finned heat exchanger needs to be frequently cleaned. The use of the air inlet filter screen reduces the cleaning frequency and greatly reduces the high-risk operation. The preferred mesh number of the filter screen can effectively filter dust in the air.

[0016] The cooling device is a fluidized bed cooler.

[0017] The preferred fluidized bed cooler is common, easy to obtain and high in cooling efficiency.

[0018] The air distribution plate is in a grid structure.

[0019] The preferred grid structure of the air distribution plate is convenient to clean and uniform in air distribution.

[0020] Maintenance doors for personnel to enter or exit the air inlet chamber or the air outlet chamber for maintenance are arranged on the sidewall of the air inlet chamber and the partition wall.

[0021] The air outlet chamber is provided with a maintenance door, which is convenient for maintenance.

[0022] The control unit comprises a timing control switch.

[0023] The preferred control unit capable of timing control can greatly reduce the labor cost.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] 1) The alkali fiber cooling device of the present application adopts a design way composed of a fiber filter and a partition wall arranged between the air inlet chamber and the air outlet chamber, which has the advantages of prolonging the cleaning period of the alkali fiber cooler, effectively reducing energy consumption and saving cost;

[0026] 2) The filtering efficiency and effect of the preferred number and size of filter cartridges are optimal;

[0027] 3) The setting of the air supplement port can solve the problem that when the air inlet of the finned heat exchanger is blocked by foreign matter during the operation of the alkali fiber cooler, the air inlet amount is insufficient, and the air volume demand of normal production cannot be met;

[0028] 4) The preferred number and area of the air supplement port can meet the demand of alkali fiber cooling;

[0029] 5) The air inlet filter screen can filter dust and particulate matter in the air, thereby reducing the blockage of the finned heat exchanger by small substances, and is beneficial to prolonging the cleaning period of the finned heat exchanger. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a perspective structural schematic view of the alkali fiber cooling device.

[0031] REFERENCE NUMERALS:

[0032] Air inlet chamber 1, air outlet chamber 2, finned heat exchanger 3, water trap 4, air inlet duct 5, circulating fan 6, air outlet duct 7, air distribution plate 8, cooling bin 9, fiber filter 10, exhaust pipe 11, exhaust fan 12, access door 13, air inlet filter screen 3-1, air supplement port 5-1, air supplement filter screen 5-2, three-dimensional filter screen cover 10-1, control unit 10-2, filter cartridge 10-3, compressed air nozzle 10-4. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described clearly and completely in combination with the drawings.

[0034] As Figure 1As shown, the alkali fiber cooling device, including air inlet chamber 1, air outlet chamber 2, fin heat exchanger 3, water trap 4, air inlet duct 5, circulating fan 6, air outlet duct 7, air distribution plate 8, cooling bin 9, cooling device, fiber filter 10, exhaust pipe 11 and exhaust fan 12, air inlet chamber 1 and air outlet chamber 2 are provided with a partition wall, the air outlet of air inlet chamber 1, air inlet duct 5, circulating fan 6, air outlet duct 7, air distribution plate 8, cooling bin 9 and the air inlet of air outlet chamber 2 are connected in turn, the air inlet is formed on the side wall of air inlet chamber 1, the fin heat exchanger 3 is arranged at the air outlet of air inlet chamber 1, the water trap 4 is arranged outside air inlet chamber 1, the air inlet end of water trap 4 is communicated with the air outlet of fin heat exchanger 3, and the air outlet end is communicated with the air inlet of air inlet duct 5; the fiber filter 10 is arranged in the air outlet chamber 2, the exhaust fan 12 is arranged on the air outlet of the air outlet chamber 2, and is communicated with the inner cavity of the air outlet chamber 2 through the exhaust pipe 11; the fiber filter 10 includes a three-dimensional filter screen cover 10-1, a plurality of filter units spaced apart and arranged on the top of the three-dimensional filter screen cover 10-1 and a control unit 10-2; the cooling device is arranged in the cooling bin 9, the bottom of the three-dimensional filter screen cover 10-1 is communicated with the air outlet of the cooling bin 9, the surrounding wall is a filter screen, and a plurality of mounting holes are arranged on the top wall; each filter unit comprises a filter cartridge 10-3 with an open top, a side wall and a bottom, and a compressed air nozzle 10-4 arranged above the filter cartridge 10-3, the compressed air nozzle 10-4 is directed to the center of the bottom wall of the filter cartridge 10-3, and the filter cartridge 10-3 of each filter unit is arranged in a mounting hole and extends into the inner cavity of the three-dimensional filter screen cover 10-1; the compressed air nozzle 10-4 is connected with the control unit 10-2.

[0035] The number of filter cartridges 10-3 is 4-5 per square meter, the diameter of each filter cartridge 10-3 is 150-250mm, and the length is 800-1200mm. At least two air supplement openings 5-1 are arranged on the side wall of the air inlet duct 5, and an air supplement filter screen 5-2 is arranged on each air supplement opening 5-1.

[0036] The number of air supplement openings 5-1 is two, and the area of each air supplement opening 5-1 is 300mm*400mm.

[0037] The fin heat exchanger 3 is movably covered with an 80-120 mesh air inlet filter screen 3-1.

[0038] The cooling device is a fluidized bed cooler.

[0039] The air distribution plate 8 is of a grid structure.

[0040] The side wall of the air inlet chamber 1 and the partition wall are respectively provided with a maintenance door 13 for personnel to enter and exit the air inlet chamber 1 or the air outlet chamber 2 for maintenance. The control unit 10-2 comprises a timing control switch.

Claims

1. An alkali fiber cooling device characterized by: The application relates to a kind of air cooling devices, including air inlet chamber (1), air outlet chamber (2), fin heat exchanger (3), water trap (4), air inlet duct (5), circulating fan (6), air outlet duct (7), air distribution plate (8), cooling bin (9), cooling device, filter (10), exhaust pipe (11) and exhaust fan (12);Air inlet chamber (1) and air outlet chamber (2) are provided with isolation wall, the air outlet of air inlet chamber (1), air inlet duct (5), circulating fan (6), air outlet duct (7), air distribution plate (8), cooling bin (9) and the air inlet of air outlet chamber (2) are sequentially connected, air inlet chamber (1) side wall is provided with air inlet, fin heat exchanger (3) is arranged at the air outlet of air inlet chamber (1), water trap (4) is arranged outside air inlet chamber (1), the air inlet of water trap (4) one end is communicated with the air outlet of fin heat exchanger (3), and the air inlet of air inlet duct (5) is communicated with the air inlet;Filter (10) is arranged in air outlet chamber (2), exhaust fan (12) is arranged on the air outlet of air outlet chamber (2), and is communicated with the inner chamber of air outlet chamber (2) through exhaust pipe (11);The filter (10) includes three-dimensional filter screen cover (10-1), a plurality of filtering units spaced apart and installed on the top of the three-dimensional filter screen cover (10-1) and a control unit (10-2);Cooling device is arranged in cooling bin (9), the bottom of three-dimensional filter screen cover (10-1) is communicated with the air outlet of cooling bin (9), the wall is filter screen, and a plurality of mounting holes are spaced apart and arranged on the top wall;Each filtering unit includes filter cartridge (10-3) with top opening, side wall and bottom airtight, and compressed air nozzle (10-4) installed above the filter cartridge (10-3), the compressed air nozzle (10-4) is towards the bottom wall center of the filter cartridge (10-3), and the filter cartridge (10-3) of each filtering unit is installed in a mounting hole and extends into the inner chamber of three-dimensional filter screen cover (10-1) correspondingly;The compressed air nozzle (10-4) is connected with the control unit (10-2).

2. The alkali fiber cooling device of claim 1, wherein: The number of filter cartridges (10-3) is 4-5 per square meter, the diameter of each filter cartridge (10-3) is 150-250 mm, and the length is 800-1200 mm.

3. The alkali fiber cooling device of claim 1, wherein: At least two air supplement inlets (5-1) are arranged on the side wall of air inlet duct (5), and an air supplement filter screen (5-2) is arranged on each air supplement inlet (5-1).

4. The alkali fiber cooling device of claim 3, wherein: The number of air supplement inlets (5-1) is two, and the area of each air supplement inlet (5-1) is 300 mm*400 mm.

5. The alkali fiber cooling device of claim 1, wherein: An 80-120 mesh air inlet filter screen (3-1) is movably arranged at the air inlet of fin heat exchanger (3).

6. The alkali fiber cooling device of claim 1, wherein: The cooling device is a fluidized bed cooler.

7. The alkali fiber cooling device of claim 1, wherein: The air distribution plate (8) is a grid structure.

8. The alkali fiber cooling device of claim 1, wherein: Maintenance doors (13) for personnel to enter and exit air inlet chamber (1) or air outlet chamber (2) for maintenance are arranged on the side wall of air inlet chamber (1) and the isolation wall.

9. The alkali fiber cooling device of claim 1, wherein: The control unit (10-2) includes a timing control switch.

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