CN-122015442-A - Industrial waste heat recovery cascade utilization device and method based on multiphase flow enhanced heat transfer

CN122015442ACN 122015442 ACN122015442 ACN 122015442ACN-122015442-A

Abstract

The invention belongs to the technical field of heat exchange devices, and particularly relates to an industrial waste heat recovery cascade utilization device and method based on multiphase flow enhanced heat transfer, wherein the industrial waste heat recovery cascade utilization device comprises a feeding conveyor belt for conveying materials, a drying cylinder, a tail gas treatment assembly, a waste heat collection assembly and a heat transfer assembly, wherein the waste heat collection assembly and the heat transfer assembly are sequentially connected with the tail gas treatment assembly, and the waste heat collection assembly is provided with a plurality of heat absorbing points for absorbing heat from the tail gas treatment assembly and transmitting the heat to the materials of the feeding conveyor belt along the heat transfer assembly; the open-close type heat insulation assembly is arranged inside the feeding conveyor belt and penetrated by the heat transfer assembly, and is provided with three states of closing, opening and impacting, and when the open-close type heat insulation assembly is closed, the overlapping position of the feeding conveyor belt and the heat transfer assembly reaches the preset sealing degree. The invention sets up a plurality of heat absorbing points to carry out cascade utilization of waste heat, and simultaneously sets up three states of closing, opening and impacting, thereby reducing heat dissipation and discharging byproducts generated by waste heat recovery.

Inventors

WANG BAOSHUAN
QIN LEI
WANG ZHIBO
WANG SIANG
QIN TENG
XING JUNLIANG
ZHAO LEI

Assignees

新疆苏丰生物科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. Industrial waste heat recovery cascade utilization device based on heterogeneous flow enhanced heat transfer, including material loading conveyer belt (1), drying cylinder (2) and tail gas treatment assembly (3) that are used for carrying the material, its characterized in that still includes: The waste heat collecting assembly (4) and the heat transfer assembly (5) are sequentially connected with the tail gas treatment assembly (3), the waste heat collecting assembly (4) is provided with a plurality of heat absorbing points, absorbs heat from the tail gas treatment assembly (3) and conducts the heat to the materials of the feeding conveyor belt (1) along the heat transfer assembly (5); The open-close type heat insulation assembly (6) is arranged inside the feeding conveyor belt (1) and is penetrated by the heat transfer assembly (5), and the open-close type heat insulation assembly (6) is provided with three states of closing, opening and impacting; When the heat-insulating device is closed, the open-close type heat-insulating assembly (6) is closed at the overlapping position of the feeding conveyor belt (1) and the heat transfer assembly (5) so as to reduce heat dissipation; when the heat insulation device is opened, the open-close type heat insulation assembly (6) discharges byproducts of waste heat recovery; During impact, the open-close type heat insulation assembly (6) generates impact force to act on the byproducts so as to enable the byproducts to fall off.
2. Industrial waste heat recovery cascade utilization device based on multiphase flow intensified heat transfer according to claim 1, characterized in that the open-close type heat insulation assembly (6) comprises a heat insulation part arranged inside the feeding conveyor belt (1): A base (601) and two baffles (602) positioned on two sides of the base (601); the temperature sensor (603) is used for monitoring the temperature value of the overlapping position of the feeding conveyor belt (1) and the heat transfer component (5) in real time; The device comprises a mounting base (604), a linear electric cylinder (605) and a supporting plate (606) which are vertically and sequentially connected, wherein the bottom of the linear electric cylinder (605) is connected with a base (601) through the mounting base (604), and a cylinder rod of the linear electric cylinder (605) is connected with an adjacent baffle plate (602) through the supporting plate (606); When the temperature value exceeds the temperature threshold value, the cylinder rod of the linear electric cylinder (605) stretches and lifts the supporting plate (606) and the two baffles (602) until the two baffles (602) are attached to the base (601) and reach a closed state; When the temperature value does not exceed the temperature threshold value, the cylinder rod of the linear electric cylinder (605) is shortened, the supporting plate (606) and the two baffles (602) are lowered, the interval between the two baffles (602) and the base (601) is opened, and the opening state is achieved.
3. The industrial waste heat recovery cascade utilization device based on multiphase flow enhanced heat transfer according to claim 2, wherein a bent rod (6010) and an impact piece (6011) are sequentially welded on one side, close to each other, of each baffle (602), and the bent rod (6010) and the impact piece (6011) are staggered with a supporting plate (606) along the axial direction of a linear electric cylinder (605); When the opening state is reached, the linear electric cylinder (605) intermittently lowers the support plate (606) until the bent rod (6010) and the impact member (6011) impact the base (601) at a preset frequency, and an impact force is generated to act on the by-product to drop the by-product.
4. The industrial waste heat recovery cascade utilization device based on multiphase flow enhanced heat transfer according to claim 2, wherein the base (601) is in a folded shape with a raised middle, a first extension part (607) and a second extension part (608) are arranged at the interval between the base (601) and two baffles (602), and a polyurethane layer (609) is adhered to the tops of the two baffles (602); when the first extension (607) and the second extension (608) are in contact, the base (601) is closed with two flaps (602).
5. The industrial waste heat recovery cascade utilization device based on multiphase flow enhanced heat transfer according to claim 1, wherein the heat transfer assembly (5) comprises a hollow heat conduction roller (501), a third heat conduction pipe (502) and a second spiral section (503) which are vertically and sequentially arranged, rotary joints (504) are connected between two ends of the hollow heat conduction roller (501) and openings of the third heat conduction pipe (502), and mounting flanges (505) are arranged outside the rotary joints (504); During operation, the second spiral section (503) is overlapped with the waste heat collecting assembly (4) in a local spiral mode, so that heat absorbed by the waste heat collecting assembly (4) is conducted to materials of the feeding conveyor belt (1) along the second spiral section (503), the third heat conducting pipe (502) and the hollow heat conducting roller (501).
6. The industrial waste heat recovery cascade utilization device based on multiphase flow enhanced heat transfer according to claim 1, wherein the waste heat collection assembly (4) comprises a heat conduction fin (402), a first heat conduction pipe (401), a second heat conduction pipe (403) and a first spiral section (404) which are sequentially connected; The heat conducting fins (402) are arranged in three groups and are used for forming heat absorbing points at different positions of the tail gas treatment assembly (3).
7. The industrial waste heat recovery cascade utilization device based on multiphase flow enhanced heat transfer according to claim 1, wherein the feeding conveyor belt (1) comprises a frame (101) and a belt (102) positioned inside the frame (101), and a motor (103) for rotating the belt (102) and a controller (104) for controlling the motor (103) are arranged outside the frame (101); Wherein, open-close type heat insulation assembly (6) is arranged inside belt (102) and is used for semi-surrounding the top of heat transfer assembly (5).
8. The industrial waste heat recovery cascade utilization device based on multiphase flow enhanced heat transfer according to claim 1, wherein the drying cylinder (2) comprises a feeding hopper (201), a first cylinder body (202), a second cylinder body (204) and a third cylinder body (205) which are transversely and sequentially communicated, an air inlet pipe (203) for providing high-temperature gas is connected to the outer side of the first cylinder body (202), and the third cylinder body (205) is connected with a tail gas treatment assembly (3); when the material feeding conveyor belt (1) conveys materials, the material feeding hopper (201) is opened and receives the materials.
9. The industrial waste heat recovery cascade utilization device based on multiphase flow enhanced heat transfer according to claim 1, wherein the tail gas treatment assembly (3) comprises a first tail gas treatment pipe (301), a waste liquid pool (302), a second tail gas treatment pipe (303) and a third tail gas treatment pipe (304) which are sequentially communicated with the drying cylinder (2); Wherein the heat absorption point is arranged on the first tail gas treatment pipe (301), the second tail gas treatment pipe (303) and the third tail gas treatment pipe (304).
10. Industrial waste heat recovery cascade utilization method based on multiphase flow enhanced heat transfer, using the industrial waste heat recovery cascade utilization device based on multiphase flow enhanced heat transfer according to any one of claims 1-9, characterized by comprising the following steps: the feeding stage comprises the steps that a feeding conveyor belt (1) is started to continuously feed materials into a drying cylinder (2), meanwhile, a hot blast stove generates high-temperature gas and blows the high-temperature gas into the drying cylinder (2) to dry the materials, and the drying cylinder (2) rotates and turns the materials, so that the winded area is increased; The tail gas treatment stage comprises the steps that the tail gas treatment component (3) filters impurities in the tail gas and sprays solution, negative pressure attractive force is provided, and the filtered tail gas is discharged to the atmosphere; the waste heat collection assembly (4) forms three heat absorption points at different positions of the tail gas treatment assembly (3), and forms a closed loop outside the tail gas treatment assembly (3) for circulating a heat conducting medium and absorbing heat by matching with the three heat absorption points; The heat transfer stage is that the heat transfer component (5) and the waste heat collection component (4) are spirally overlapped, and the heat transfer is realized by the temperature difference generated by the heat transfer component and the waste heat collection component, so that the heat of the waste heat collection component (4) is transferred to the material of the feeding conveyor belt (1) along the heat transfer component (5), and the preheating of the material is realized; And in the heat utilization stage, when the temperature value of the heat transfer assembly (5) exceeds a temperature threshold value, controlling the open-close type heat insulation assembly (6) to enter a closed state, forming a preset sealing degree outside the heat transfer assembly (5) to reduce heat dissipation, and when the temperature value of the heat transfer assembly (5) does not exceed the temperature threshold value, controlling the open-close type heat insulation assembly (6) to enter an open and impact state to generate impact force to act on byproducts to enable the byproducts to fall off.

Description

Industrial waste heat recovery cascade utilization device and method based on multiphase flow enhanced heat transfer Technical Field The invention belongs to the technical field of heat exchange devices, and particularly relates to an industrial waste heat recovery cascade utilization device and method based on multiphase flow enhanced heat transfer. Background In the spray granulation production, wet particles granulated by a granulator are continuously fed into a drying cylinder by a belt or a screw conveyor, high-temperature hot air is generated by a hot blast furnace and is blown into the drying cylinder, so that the high-temperature hot air and the wet particles form countercurrent or concurrent heat exchange. The tail gas discharged from the drying cylinder has heat, and a waste heat recovery device is generally adopted for heat recovery and utilization. The conventional waste heat recovery device generally utilizes a heat conducting medium to conduct heat, for example, the retrieved China patent application (publication number: CN 120333195A) discloses a high-efficiency cascade utilization medium-low temperature flue gas waste heat recovery system and a method thereof, the arc-shaped concave at the center of the inner side of a thermal medium bin is matched with a smoke discharging mechanism, the contact area between the inner side of the thermal medium bin and flue gas is enlarged by utilizing the concave, the limitation of the smoke discharging mechanism on the discharge of the flue gas is matched, the contact area between the flue gas and the thermal medium bin is enlarged, and meanwhile, the contact time between the flue gas and the thermal medium bin is prolonged, so that the heat of the medium-low temperature flue gas is more effectively transferred to the heat conducting medium in the thermal medium bin. In the actual exhaust gas waste heat recovery process, the waste heat utilization mode of the heat conduction contact area is increased at fixed points, and is easily influenced by the temperature difference of the exhaust gas treatment process, so that the temperature of the end point of waste heat conduction fluctuates, and the temperature balance of waste heat utilization is difficult to improve. Disclosure of Invention The invention aims to provide an industrial waste heat recovery cascade utilization device and method based on multiphase flow enhanced heat transfer, which can be provided with a plurality of heat absorbing points to perform cascade utilization of waste heat, and simultaneously set three states of closing, opening and impacting to reduce heat loss and discharge byproducts generated by waste heat recovery. The technical scheme adopted by the invention is as follows: Industrial waste heat recovery cascade utilization device based on heterogeneous flow enhanced heat transfer, including material loading conveyer belt, dry section of thick bamboo and the tail gas treatment subassembly that is used for carrying the material, still include: The waste heat collecting assembly and the heat transfer assembly are sequentially connected with the tail gas treatment assembly, and the waste heat collecting assembly is provided with a plurality of heat absorbing points, absorbs heat from the tail gas treatment assembly and transfers the heat to the materials of the feeding conveyor belt along the heat transfer assembly; The open-close type heat insulation assembly is arranged inside the feeding conveyor belt and penetrated by the heat transfer assembly, and is provided with three states of closing, opening and impacting; When the heat-insulating assembly is closed, the opening-closing type heat-insulating assembly is closed at the overlapping position of the feeding conveyor belt and the heat-transferring assembly, so that heat dissipation is reduced; When the opening and closing type heat insulation assembly is opened, the by-product of waste heat recovery is discharged; During impact, the open-close type heat insulation assembly generates impact force to act on the byproducts so as to enable the byproducts to fall off. As an alternative, the open-close type heat insulation assembly comprises a heat insulation assembly arranged inside the feeding conveyor belt: the base and two baffles positioned at two sides of the base; The temperature sensor is used for monitoring the temperature value of the overlapping position of the feeding conveyor belt and the heat transfer component in real time; the linear electric cylinder is characterized by comprising a mounting base, a linear electric cylinder and a supporting plate which are vertically and sequentially connected, wherein the bottom of the linear electric cylinder is connected with a base through the mounting base, and a cylinder rod of the linear electric cylinder is connected with an adjacent baffle through the supporting plate; When the temperature value exceeds the temperature threshold value, the linear electric cylinder rod stretches