A thermal storage quenching tower

Abstract

A heat storage type rapid cooling tower comprises a heat storage inlet, a cooling inlet, a purge inlet, a heat storage outlet, a cooling outlet, a purge outlet, a shell, a heat storage body, a sealing system and a power system. The shell divides the heat storage body into three parts: a heat storage area, a cooling area and a purge area; the heat storage body, the sealing system and the power system are all inside the shell. There are three groups of inlets and three groups of outlets on the outside of the shell. The three groups of inlets are respectively a heat storage inlet, a purge inlet and a cooling inlet; the three groups of outlets are respectively a heat storage outlet, a cooling outlet and a purge outlet. The heat storage body is divided into three sections: a heat storage area, a purge area and a cooling area. The heat storage body rotates at a constant speed along the central axis, and the positions of the three sections are not fixed on the heat storage body. The power system is used to drive the heat storage body to rotate continuously and uniformly. The heat storage type rapid cooling tower of the present invention has the advantages of rapid cooling, controllable temperature of the flue gas after cooling, stable operation, utilization of flue gas waste heat, no increase in flue gas volume, small footprint, simple structure, low maintenance workload and low investment cost.

Description

Technical Field

[0001] The invention relates to a heat storage type quenching tower, belongs to the technical field of flue gas treatment, and is particularly suitable for inhibiting the complex generation of dioxin-like substances in the flue gas cooling process. Background Art

[0002] In flue gas treatment, to prevent dioxin regeneration, flue gas typically requires a rapid cooling device between 200°C and 500°C. National standards and technical specifications require that flue gas be cooled from 500°C to 200°C in no more than 1 second. Liquid cooling, such as water spraying, is a commonly used cooling method both domestically and internationally. Liquid-cooled quench towers are typically straight-cylinder structures, with flue gas entering from the top and exiting from the bottom after cooling. Coolant is sprayed into the quench tower from the top and atomized by a spray gun, ensuring full contact between the coolant and the flue gas. Liquid spray cooling typically flows in the same direction as the hot flue gas, increasing the temperature difference between the liquid and flue gas, speeding up the flue gas cooling. During the flue gas cooling process, the coolant also vaporizes, significantly increasing the flue gas flow rate. Liquid-cooled quench towers offer advantages such as rapid cooling and zero waste. However, they fail to utilize the energy released during the flue gas cooling process, significantly reducing the energy efficiency of the entire system. At the same time, the flue gas vaporizes a large amount of coolant during the cooling process. After the flue gas passes through the quenching tower, the flue gas volume increases greatly or even doubles, causing the processing capacity of all equipment such as back-end processing equipment, pipelines and fans to increase, greatly increasing the project investment cost and operating cost. Summary of the Invention

[0003] Technical problem: The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a heat storage quenching tower with rapid cooling, controllable flue gas temperature after cooling, stable operation, usable flue gas waste heat, no increase in flue gas volume, small footprint, simple structure, low maintenance workload and low investment cost.

[0004] Technical solution: The purpose of the present invention is achieved as follows: A heat storage type quenching tower, comprising a purge outlet, a cooling outlet, a heat storage inlet, a purge inlet, a cooling inlet, a heat storage outlet, a shell, a heat storage body and a power system; the purge outlet, the cooling outlet and the heat storage inlet are arranged on one side of the shell, and the purge inlet, the cooling inlet and the heat storage outlet are arranged on the other side of the shell; the heat storage body is arranged in the shell, and the heat storage body is divided into a cooling area, a purge area and a heat storage area along the axial direction by a partition; the power system is arranged at the bottom of the heat storage body, and is connected to the heat storage body by a partition. The connecting shaft drives the heat storage body to rotate. The heat storage area, the purge area and the cooling area correspond to the heat storage inlet, the purge outlet and the cooling outlet on both sides of the shell respectively. The three areas rotate dynamically and cyclically in the order of "heat storage area-purge area-cooling area-heat storage area". During the rotation process, the cooling area, the purge area and the heat storage area in the heat storage body respectively send the gas entering from the purge inlet, the cooling inlet and the heat storage inlet to the purge outlet, the cooling outlet and the heat storage outlet respectively. The outlet temperature of the heat storage area is controlled by controlling the rotation speed of the heat storage body (8). The higher the rotation speed, the lower the outlet temperature of the heat storage area.

[0005] Another heat storage type rapid cooling tower includes a purge outlet, a cooling outlet, a heat storage inlet; a purge inlet, a cooling inlet, a heat storage outlet, a shell, a heat storage body and upper and lower three-way rotary valves; the middle part of the shell is cylindrical, and the upper and lower ends are trumpet-shaped, symmetrically buckled together, the heat storage body is arranged in the cylindrical barrel in the middle of the shell, and is vertically installed along the cylindrical axis, and the heat storage body is fixed; the trumpet mouths at the upper and lower ends of the shell are divided into multiple odd-numbered intervals by partitions, and the multiple intervals inside the shell are orderly composed of a shell heat storage area, a shell purge area and a shell cooling area; the outlet of the lower three-way rotary valve at the lower part is respectively provided with a purge outlet, The cooling outlet and heat storage inlet are respectively provided with a purge inlet, a cooling inlet and a heat storage outlet on the upper three-way rotary valve; the shell is driven to rotate by the connecting shaft, and the multiple shell heat storage areas, shell purge areas and shell cooling areas inside the bell mouths at the upper and lower ends of the shell correspond to each other, and rotate dynamically in a cycle in the order of "heat storage area-purge area-cooling area-heat storage area"; the gases entering the purge inlet, cooling inlet and heat storage inlet are respectively sent to the purge outlet, cooling outlet and heat storage outlet through the upper and lower three-way rotary valves; the outlet temperature of the heat storage area is controlled by controlling the rotation speed of the heat storage body. The higher the rotation speed, the lower the outlet temperature of the heat storage area.

[0006] The partition is divided into a cooling zone, a purge zone and a heat storage zone along the axial direction. An inlet and an outlet are respectively provided at both ends of each zone. The airflow directions of the heat storage zone, the cooling zone and the purge zone are opposite.

[0007] The rotation speed of the heat storage body is 1-10 revolutions per hour.

[0008] The cross section of the heat storage body is in the shape of a honeycomb hole, the honeycomb through-holes are circular holes or polygonal holes, the diameter and side length of the holes are less than 5 mm, and the material is ceramic, zeolite or metal.

[0009] The space proportion of the heat storage zone is 0.3-0.7, the space proportion of the cooling zone is 0.3-0.7, and the space proportion of the purge zone is 0-0.3.

[0010] The superficial flow velocity in each section of the heat storage body is between 0.5 and 2 m / s.

[0011] The thickness of the heat storage body is between 0.3 and 1.5 meters, and the thickness is determined according to the required degree of cooling of the flue gas.

[0012] A mechanical seal or a gas seal is provided between the shell and the heat storage body to prevent unpurified flue gas from entering the cooling zone or the purge zone.

[0013] A through hole is provided between the partition plate of the cooling zone and the purge zone to play a purge role and prevent dust and debris from clogging the heat storage body.

[0014] Beneficial effects: The first structure of the thermal storage quenching tower of the present invention mainly comprises a first shell, a first thermal storage element, a sealing system, and a power system. The second structure of the thermal storage quenching tower mainly comprises a second shell, a second thermal storage element, a sealing system, and a rotary valve. The main difference between structure one and structure two is that in structure one, the first thermal storage element is installed horizontally along the cylindrical axis and rotates along the cylindrical axis. In structure two, the second thermal storage element is installed vertically along the cylindrical axis and is not fixed, with the rotary valve rotating to distribute the airflow in a circular manner.

[0015] The shell of the structure of the heat storage quenching tower has three air inlets and three air outlets for external connection. The three air inlets are respectively the heat storage inlet, the purge inlet, and the cooling inlet. The three air outlets are respectively the heat storage outlet, the purge outlet, and the cooling outlet. The interior of the shell is divided into three sections by partitions. The three sections are respectively the heat storage area, the purge area, and the cooling area. A space is left in the middle of the shell for installing the heat storage body. The outer shape of the heat storage body is cylindrical, and the interior of the heat storage body is honeycomb-shaped. The shape of the honeycomb holes can be circular holes, triangular holes, polygonal holes, or holes of other variant shapes. The heat storage body is installed horizontally along the central axis of the cylinder. The heat storage body is installed inside the shell. Mechanical seals or air seals are used between the heat storage body and the partition of the shell to prevent cross-flow of air between the various sections. The heat storage body rotates continuously along the axis of the cylinder, so that different parts of the heat storage body enter the heat storage area-purge area-cooling area and circulate. The power system is installed to provide driving force for the rotation of the heat storage body 1, and the power system transmission mode can be belt drive, chain drive, gear drive and other transmission modes. The speed of the power system is adjustable, and the speed of the heat storage body 1 is adjusted to control the temperature of the air outlet of each partition.

[0016] The structure of a regenerative quenching tower consists of a second shell divided into multiple compartments by partitions, with a central space for the installation of the second heat storage element. The second heat storage element is cylindrical in shape, with a honeycomb-like interior. The cells can be circular, triangular, polygonal, or other variations. The second heat storage element is mounted vertically along the central axis of the cylinder and within the second shell. Mechanical or airtight seals are used between the second heat storage element and the partitions to prevent cross-flow between the compartments. The second heat storage element remains stationary. Rotary valves are mounted at the upper and lower ends of the shell. Two sets of rotary valves rotate synchronously, distributing each airflow into each compartment of the shell at once. The airflow into (and out of) each compartment follows a cycle of "regeneration-purge-cooling-regeneration." The rotary valves have an adjustable speed, which controls the outlet temperature of each compartment. Typically, the purge and cooling airflows flow in the opposite direction of the regenerative airflow. Under certain working conditions, only the heat storage area and the cooling area are retained, and the purge area is eliminated. The cooling area also has the function of the purge area. Compared with the existing reversing valve, the main advantages of this invention are:

[0017] 1. Fast cooling speed, the fastest cooling speed is up to 1000℃ / s;

[0018] 2. It is suitable for a wide range of flue gas temperatures, and can be applied to flue gas with a maximum temperature of 1100°C;

[0019] 3. Using indirect heat exchange does not increase the amount of flue gas;

[0020] 4. Adopting heat storage heat exchange, high heat utilization rate;

[0021] 5. The flue gas temperature is adjustable and controllable, and it is applicable to a wide range of flue gas types;

[0022] 6. Adopt porous heat storage and heat exchange, with good heat exchange uniformity and low dioxin recombination rate.

[0023] 7. Simple structure, strong practicality and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a heat storage quenching tower according to Example 1 of the present invention.

[0025] Figure 2 This is a schematic diagram of the heat storage body partitioning of the heat storage type quenching tower according to the first embodiment of the present invention.

[0026] Figure 3 This is a structural schematic diagram of a thermal storage quenching tower according to the second embodiment of the present invention.

[0027] In the figure: 1-purge outlet; 2-cooling outlet; 3-heat storage inlet; 4-purge inlet; 5-cooling inlet; 6-heat storage outlet; 7-shell; 8-heat storage body; 9-power system; 10-cooling area; 11-purge area; 12-heat storage area; 13-rotary valve. DETAILED DESCRIPTION

[0028] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0029] Example 1, as Figure 1 Figure 2As shown, a heat storage type quenching tower of the present invention mainly consists of a purge outlet (1), a cooling outlet (2), a heat storage inlet (3), a purge inlet (4), a cooling inlet (5), a heat storage outlet (6), a shell (7), a heat storage body (8) and a power system (9); the purge outlet (1), the cooling outlet (2) and the heat storage inlet (3) are arranged on one side of the shell (7), and the purge inlet (4), the cooling inlet (5) and the heat storage outlet (6) are arranged on the other side of the shell (7); the heat storage The heat storage body (8) is arranged in the shell (7), and the heat storage body (8) is divided into a cooling area (10), a purge area (11) and a heat storage area (12) along the axial direction by a partition. The power system (9) is arranged at the bottom of the heat storage body (8), provides a driving force for the rotation of the heat storage body (8), and drives the heat storage body (8) to rotate through a connecting shaft. The power system (9) includes a motor and a transmission device, and the transmission device is a combination of one or more of chain drive, belt drive, and gear drive. The motor is a variable frequency motor for adjusting the speed. The heat storage area (12), the purge area (11), and the cooling area (10) correspond to the heat storage inlet, the purge outlet, and the cooling outlet on both sides of the shell (7), respectively. The three areas rotate dynamically in a cycle according to the sequence of "heat storage area-purge area-cooling area-heat storage area". During the rotation process, the cooling area (10), the purge area (11), and the heat storage area (12) in the heat storage body (8) respectively send the gas entering through the purge inlet (4), the cooling inlet (5), and the heat storage inlet (3) to the purge outlet (1), the cooling outlet (2), and the heat storage outlet (6). The outlet temperature of the heat storage area is controlled by controlling the rotation speed of the heat storage body (8). The higher the rotation speed, the lower the outlet temperature of the heat storage area. The partition is divided into a cooling zone (10), a purge zone (11) and a heat storage zone (12) along the axial direction. An inlet and an outlet are provided at both ends of each zone. The airflow directions of the heat storage zone (12), the cooling zone (10) and the purge zone (11) are opposite. Under certain working conditions, only the heat storage zone (12) and the cooling zone (10) are retained, and the purge zone (11) is cancelled. The cooling zone (10) also has the function of the purge zone (11). The rotation speed of the heat storage body (8) is 1-10 revolutions / hour. The cross section of the heat storage body (8) is honeycomb-shaped, and the honeycomb through-holes are circular or polygonal. The diameter and side length of the holes are less than 5 mm. The material is ceramic, zeolite or metal. The space ratio of the heat storage zone is 0.3-0.7, the space ratio of the cooling zone is 0.3-0.7, and the space ratio of the purge zone is 0-0.3. The empty tower flow rate in each zone of the heat storage body (8) is between 0.5-2m / s. The thickness of the heat accumulator (8) is between 0.3 and 1.5 meters, and the value is determined according to the required cooling range of the flue gas. A mechanical seal or a gas seal is provided between the shell (7) and the heat accumulator (8) to prevent unpurified flue gas from entering the cooling zone or the purge zone. A through hole is provided between the partitions of the cooling zone (10) and the purge zone (11) to perform a purge function and prevent dust and debris from clogging the heat accumulator.

[0030] Example 2, as Figure 3 As shown, another heat storage type rapid cooling tower of the present invention is mainly composed of a purge outlet (1), a cooling outlet (2), a heat storage inlet (3), a purge inlet (4), a cooling inlet (5), a heat storage outlet (6), a shell (7), a heat storage body (8) and an upper and lower three-way rotary valve; the middle part of the shell (7) is cylindrical, and the upper and lower ends are trumpet-shaped and symmetrically buckled together. The heat storage body (8) is arranged in the cylindrical barrel in the middle of the shell (7) and is vertically installed along the cylindrical axis. The heat storage body (8) is fixed; the trumpet mouths at the upper and lower ends of the shell (7) are respectively divided into a plurality of odd-numbered intervals by partitions, and the plurality of intervals inside the shell are orderly composed of a shell heat storage area, a shell purge area and a shell cooling area; the outlet of the lower three-way rotary valve (13) is respectively provided with a purge outlet. The heat storage outlet (1), cooling outlet (2) and heat storage outlet (3) are provided on the three-way rotary valve (13) at the top, respectively, with a purge inlet (4), a cooling inlet (5) and a heat storage outlet (6); the shell (7) is driven to rotate by a connecting shaft, and multiple shell heat storage areas, shell purge areas and shell cooling areas inside the bell mouths at the upper and lower ends of the shell correspond to each other, and rotate dynamically in a cycle according to the sequence of "heat storage area-purge area-cooling area-heat storage area"; the gas entering the purge inlet (4), cooling inlet (5) and heat storage inlet (3) is respectively sent to the purge outlet (1), cooling outlet (2) and heat storage outlet (6) through the upper and lower three-way rotary valves; the outlet temperature of the heat storage area is controlled by controlling the rotation speed of the heat storage body (8), and the higher the rotation speed, the lower the outlet temperature of the heat storage area. The cross section of the heat storage body (8) is honeycomb-shaped, and the honeycomb through-holes are circular or polygonal, with the diameter and side length of the holes less than 5 mm, and the material is ceramic, zeolite or metal. The space ratio of the heat storage area is 0.3-0.7, the space ratio of the cooling area is 0.3-0.7, and the space ratio of the purge area is 0-0.3. The empty tower flow rate in each interval of the heat storage body (8) is between 0.5-2m / s. The thickness of the heat storage body (8) is between 0.3-1.5 meters; the value is determined according to the required cooling range of the flue gas. A mechanical seal or a gas seal is provided between the shell (7) and the heat storage body (8) to prevent unpurified flue gas from entering the cooling area or the purge area.

Claims

1. A thermal storage quenching tower, characterized in that: It comprises a purge outlet (1), a cooling outlet (2), a heat storage inlet (3), a purge inlet (4), a cooling inlet (5), a heat storage outlet (6), a shell (7), a heat storage body (8) and a power system (9); the purge outlet (1), the cooling outlet (2) and the heat storage inlet (3) are arranged on one side of the shell (7), and the purge inlet (4), the cooling inlet (5) and the heat storage outlet (6) are arranged on the other side of the shell (7); the heat storage body (8) is arranged in the shell (7), and the heat storage body (8) is divided into a cooling area (10), a purge area (11) and a heat storage area (12) along the axial direction by a partition; the power system (9) is arranged at the bottom of the heat storage body (8), and is connected to the heat storage body (8) by a partition. The connecting shaft drives the heat storage body (8) to rotate. The heat storage area (12), the purge area (11), and the cooling area (10) correspond to the heat storage inlet, the purge outlet, and the cooling outlet on both sides of the shell (7), respectively. The three areas rotate dynamically and cyclically in the order of "heat storage area-purge area-cooling area-heat storage area". During the rotation process, the cooling area (10), the purge area (11), and the heat storage area (12) in the heat storage body (8) respectively send the gas entering from the purge inlet (4), the cooling inlet (5), and the heat storage inlet (3) to the purge outlet (1), the cooling outlet (2), and the heat storage outlet (6). The outlet temperature of the heat storage area is controlled by controlling the rotation speed of the heat storage body (8). The higher the rotation speed, the lower the outlet temperature of the heat storage area.

2. A thermal storage quenching tower according to claim 1, characterized in that: An inlet and an outlet are respectively provided at both ends of each of the cooling zone (10), the purge zone (11) and the heat storage zone (12), and the airflow directions of the heat storage zone (12) and the cooling zone (10) and the purge zone (11) are opposite.

3. A regenerative quenching tower according to claim 1, characterized in that: The rotation speed of the heat storage body (8) is 1-10 revolutions per hour.

4. A regenerative quenching tower according to claim 1, characterized in that: A through hole is provided between the partitions of the cooling zone (10) and the purge zone (11) for performing a purge function and preventing dust and debris from clogging the heat storage body.

5. A thermal storage quenching tower, characterized in that: It comprises a purge outlet (1), a cooling outlet (2), a heat storage inlet (3), a purge inlet (4), a cooling inlet (5), a heat storage outlet (6), a shell (7), a heat storage body (8) and upper and lower three-way rotary valves; the shell (7) is cylindrical in the middle, and the upper and lower ends are trumpet-shaped and symmetrically buckled together, the heat storage body (8) is arranged in the cylindrical barrel in the middle of the shell (7), and is vertically installed along the cylindrical axis, and the heat storage body (8) is fixed; the trumpet mouths at the upper and lower ends of the shell (7) are respectively divided into a plurality of odd-numbered intervals by partitions, and the plurality of intervals inside the shell are orderly composed of a shell heat storage area, a shell purge area and a shell cooling area; the outlet of the three-way rotary valve (13) at the bottom is respectively provided with a purge outlet (1), a cooling outlet (2) and a heat storage inlet (3), a purge inlet (4), a cooling inlet (5) and a heat storage outlet (6) are respectively provided on the three-way rotary valve (13) located at the upper part; the shell (7) is driven to rotate by the connecting shaft, and the multiple shell heat storage areas, shell purge areas and shell cooling areas inside the bell mouths at the upper and lower ends of the shell correspond to each other, and rotate dynamically in a cycle according to the sequence of "heat storage area-purge area-cooling area-heat storage area"; the gas entering the purge inlet (4), the cooling inlet (5) and the heat storage inlet (3) is respectively sent to the purge outlet (1), the cooling outlet (2) and the heat storage outlet (6) through the upper and lower three-way rotary valves; the outlet temperature of the heat storage area is controlled by controlling the rotation speed of the heat storage body (8), and the higher the rotation speed, the lower the outlet temperature of the heat storage area.

6. A regenerative quenching tower according to claim 1 or 5, characterized in that: The cross section of the heat storage body (8) is honeycomb-shaped, the honeycomb through-holes are circular or polygonal, the diameter and side length of the holes are less than 5 mm, and the material is ceramic, zeolite or metal.

7. A regenerative quenching tower according to claim 1 or 5, characterized in that: The space proportion of the heat storage zone is 0.3-0.7, the space proportion of the cooling zone is 0.3-0.7, and the space proportion of the purge zone is 0-0.

3.

8. A regenerative quenching tower according to claim 1 or 5, characterized in that: The superficial flow velocity in each section of the heat storage body (8) is between 0.5 and 2 m / s.

9. A regenerative quenching tower according to claim 1 or 5, characterized in that: The thickness of the heat storage body (8) is between 0.3 and 1.5 meters; the value is determined according to the required cooling range of the flue gas.

10. A regenerative quenching tower according to claim 1 or 5, characterized in that: A mechanical seal or a gas seal is provided between the shell (7) and the heat storage body (8) to prevent unpurified flue gas from entering the cooling zone or the purge zone.

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