CN214681634U

CN214681634U - External fluidized bed cold air circulating system

Info

Publication number: CN214681634U
Application number: CN202120483563.6U
Authority: CN
Inventors: 刘国梁; 张军; 李娜
Original assignee: Shandong Juxin New Material Co ltd
Current assignee: Shandong Juxin New Material Co ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2021-11-12
Anticipated expiration: 2031-03-05

Abstract

The utility model belongs to the technical field of polyacrylamide production equipment, in particular to an external fluidized bed cold air circulating system, which comprises a fluidized bed, wherein the top of a shell of the fluidized bed is provided with a hot air outlet which is connected with an external cooling device through a hot air pipe; the external cooling device comprises a heat exchange box, wherein a cooling coil filled with a cooling medium is arranged in the heat exchange box and is connected with a refrigerator through a heat preservation pipe; the bottom of the side surface of the heat exchange box is provided with a condensed water pipe interface for discharging cooling water, and the condensed water pipe interface is connected with an external water tank through a condensed water pipeline; the bottom of the heat exchange box is communicated with a blast system at the bottom of the fluidized bed through a cold air pipe. The utility model discloses a circulation is sent into fluidized bed internal drying's cold wind, can improve cooling efficiency, can avoid product material secondary to become damp again, reaches the result of use of ideal.

Description

External fluidized bed cold air circulating system

Technical Field

The utility model relates to an external fluidized bed cold wind circulation system belongs to polyacrylamide production facility technical field.

Background

In the production technology of polyacrylamide, the fluidized bed technology occupies a considerable position due to the characteristics of stability, flexibility, simplicity, economy and safety, and is generally applied. The fluidized bed is a reactor in which solid particles are in a suspended motion by passing a gas or a liquid through a granular solid layer, and a gas-solid phase reaction process or a liquid-solid phase reaction process is performed. The motor of the conventional fluidized bed bottom fan is directly installed at the bottom of the fluidized bed, so that the later-stage maintenance is inconvenient. The blast system at the end of the fluidized bed sends natural air into the bed during working, and aims to cool the dried product materials at the front section, but the natural air contains larger moisture, so that the dried product materials at the front section become damp, and the subsequent bagging or crushing process is influenced. Therefore, an external fluidized bed cold air circulation system is applied to solve the problems.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: the external fluidized bed cold air circulating system overcomes the defects of the prior art, and can circularly feed dry cold air into the fluidized bed, so that the cooling efficiency can be improved, the secondary moisture change of product materials can be avoided, and an ideal using effect is achieved.

The utility model discloses an external fluidized bed cold air circulating system, which comprises a fluidized bed, wherein the top of a shell of the fluidized bed is provided with a hot air outlet which is connected with an external cooling device through a hot air pipe; the external cooling device comprises a heat exchange box, a cooling coil filled with cooling media is arranged in the heat exchange box, and the cooling coil is connected with the refrigerator through a heat preservation pipe; the bottom of the side surface of the heat exchange box is provided with a condensed water pipe interface for discharging cooling water, and the condensed water pipe interface is connected with an external water tank through a condensed water pipeline; the bottom of the heat exchange box is communicated with a blast system at the bottom of the fluidized bed through a cold air pipe.

Further preferably, the cooling medium adopts chilled water, and the heat in the air flow is continuously taken away by the chilled water cooled by the refrigerator in a circulating manner, so that the cooling is more efficient than natural water cooling.

Preferably, the heat exchange box is provided with a dust removal cloth bag at the joint with the hot air pipe and at the joint with the cold air pipe.

The bottom of heat exchange box be provided with the support, provide the support for the heat exchange box, increase structural stability.

Heat exchange box side be equipped with cooling coil delivery port and cooling coil water inlet, respectively through the delivery port and the water inlet of heat preservation union coupling refrigerator.

The air blowing system of the utility model comprises a plurality of groups of air channels for blowing air into the fluidized bed by the fan, which respectively supply air into the bed body, can be adjusted according to the actual situation, and better control the wind power; the motor of the fan is arranged on one side of the fluidized bed, so that later-stage maintenance is facilitated; the filter is connected to one end of the air duct through the fan.

Compared with the prior art, the utility model beneficial effect who has is:

the external fluidized bed cold air circulating system of the utility model circularly sends dry cold air into the fluidized bed, thus improving the cooling efficiency, avoiding the secondary moisture of the product materials and achieving the ideal use effect; the motor of bottom fan is placed in fluidized bed one side, makes things convenient for the later stage to overhaul and maintain.

Drawings

FIG. 1 is a schematic diagram of the operation of the present invention;

fig. 2 is one of the schematic structural diagrams of the present invention.

In the figure: 1. a fluidized bed; 2. a heat exchange box; 3. a hot air outlet; 4. a hot air pipe; 5. a cooling coil; 6. a dust removal cloth bag; 7. a cold air pipe; 8. a refrigerator; 9. an air duct; 10. a fan; 11. a filter; 12. a water outlet of the cooling coil; 13. a cooling coil water inlet; 14. a condensed water pipe interface; 15. a heat preservation pipe; 16. a support; 17. an external cooling device.

Detailed Description

The invention will be further described with reference to the following examples:

as shown in fig. 1-2, the external fluidized bed cold air circulation system of the present invention includes a fluidized bed 1, a hot air outlet 3 is disposed at the top of a housing of the fluidized bed 1, and the hot air outlet 3 is connected to an external cooling device 17 through a hot air pipe 4; the external cooling device 17 comprises a heat exchange box 2, a cooling coil 5 filled with cooling medium is arranged in the heat exchange box 2 and is connected with a refrigerator 8 through a heat preservation pipe 15; the bottom of the side surface of the heat exchange box 2 is provided with a condensed water pipe interface 14 for discharging cooling water, and the condensed water pipe interface is connected with an external water tank through a condensed water pipeline; the bottom of the heat exchange box 2 is communicated with an air blast system at the bottom of the fluidized bed 1 through a cold air pipe 7.

The cooling medium adopts refrigerant water, which is more efficient than natural water cooling; dust removal cloth bags 6 are arranged at the joint of the heat exchange box 2 and the hot air pipe 4 and the joint of the heat exchange box and the cold air pipe 7; the bottom of the heat exchange box 2 is provided with a bracket 16; the side surface of the heat exchange box 2 is provided with a cooling coil water outlet 12 and a cooling coil water inlet 13 which are respectively connected with the water outlet and the water inlet of the refrigerator 8 through a heat preservation pipe 15.

The blowing system comprises a plurality of groups of air channels 9 which blow air into the fluidized bed 1 by a fan 10; the motor of the fan 10 is arranged on one side of the fluidized bed 1, so that later-stage overhaul and maintenance are facilitated; the filter 11 is connected to one end of the air duct 9 through a fan 10; the cold air pipe 7 is communicated with an air duct 9 at the tail end of the air blowing system at the bottom of the fluidized bed 1.

When the device works, a large amount of heat is released by a product material in the reaction process, hot air flow rises and is sent into the external heat exchange box 2 for cooling through the hot air outlet 3 and the hot air pipe 4; the cold air cooled by the cooling coil 5 circulates back to the air duct 9 through the cold air pipe 7, the filter 11 and the fan 10, and the cold air is circulated to cool and dry the product materials, so that the materials at the outlet of the fluidized bed 1 are dry and low in temperature. The heat in the heat exchange box 2 is taken away by coolant water in the cooling coil 5, circulated back to the refrigerator 8 to release heat, and then circulated into the heat exchange box 2; the condensed water generated after the hot air is cooled is discharged to the external water tank through a condensed water pipe at the bottom of the heat exchange tank 2. The utility model can improve the cooling efficiency and avoid the secondary moisture of the product material by circularly feeding dry cold air into the fluidized bed, thereby achieving the ideal use effect; the motor of bottom fan is placed in fluidized bed one side, can make things convenient for the later stage to overhaul and maintain.

Claims

1. The utility model provides an external fluidized bed cold wind circulation system, includes fluidized bed (1), its characterized in that: the top of the shell at the tail end of the fluidized bed (1) is provided with a hot air outlet (3), and the hot air outlet (3) is connected with an external cooling device (17) through a hot air pipe (4); the external cooling device (17) comprises a heat exchange box (2), a cooling coil (5) filled with cooling media is arranged in the heat exchange box (2), and the cooling coil (5) is connected with the refrigerator (8) through a heat preservation pipe (15); a condensed water pipe interface (14) for discharging cooling water is arranged at the bottom of the side surface of the heat exchange box (2), and is connected with an external water tank through a condensed water pipeline; the bottom of the heat exchange box (2) is communicated with a blast system at the bottom of the fluidized bed (1) through a cold air pipe (7).

2. The external fluidized bed cold air circulation system of claim 1, wherein: the cooling medium adopts chilled water.

3. The external fluidized bed cold air circulation system of claim 1, wherein: and dust removal cloth bags (6) are arranged at the joint of the heat exchange box (2) and the hot air pipe (4) and the joint of the heat exchange box and the cold air pipe (7).

4. The external fluidized bed cold air circulation system of claim 1, wherein: the bottom of the heat exchange box (2) is provided with a bracket (16).

5. The external fluidized bed cold air circulation system of claim 1, wherein: and a cooling coil water outlet (12) and a cooling coil water inlet (13) are arranged on the side surface of the heat exchange box (2) and are respectively connected with a water outlet and a water inlet of the refrigerator (8) through a heat preservation pipe (15).

6. The external fluidized bed cold air circulation system of claim 1, wherein: the blowing system comprises a plurality of groups of air ducts (9) which blow air into the fluidized bed (1) by a fan (10); the motor of the fan (10) is arranged on one side of the fluidized bed (1); the filter (11) is connected to one end of the air duct (9) through a fan (10).

7. The external fluidized bed cold air circulation system of claim 1, wherein: the cold air pipe (7) is communicated with an air duct (9) at the tail end of an air blast system at the bottom of the fluidized bed (1).