Heat exchange device for light calcium carbonate carbonization tower

Abstract

A heat exchange device for a light calcium carbonate carbonization tower comprises a lime aging pool and an isolation pipe vertically arranged on the lower middle portion of the lime aging pool, a packed column coaxial with the isolation pipe is arranged in the isolation pipe, a flowing channel allowing lime slurry to penetrate through is formed between the packed column and the isolation pipe, and a coil pipe surrounding the packed column is arranged in the flowing channel. One end of the coil pipe penetrates out of the isolation pipe and is connected with a heat exchange inlet of the carbonization tower, and the other end of the coil pipe penetrates out of the isolation pipe and is connected with a heat exchange outlet of the carbonization tower. The lime aging tank is divided into an independent lime slurry area through the isolation pipe, a main body of the coil pipe is arranged in the isolation pipe, heat exchange is carried out on the coil pipe through lime slurry in the isolation pipe, and the extraction assembly is arranged at the bottom of the isolation pipe, so that the lime slurry in the isolation pipe is extracted out of the isolation pipe; lime slurry on the isolation pipe flows into the isolation pipe, the effect that the lime slurry in the isolation pipe can circulate is achieved, and therefore the stability of heat exchange of the coil pipe is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange of carbonizing towers, in particular to a heat exchange device for a light calcium carbonate carbonizing tower. Background Art

[0002] Light calcium carbonate carbonization tower is a device used to prepare light calcium carbonate. It prepares calcium carbonate by carbonization. When carbon dioxide gas reacts with calcium hydroxide emulsion in the carbonization tower to generate calcium carbonate, a large amount of heat is released. In order to control the reaction temperature and ensure product quality and production efficiency, this part of heat needs to be exported in time. Therefore, the carbon dioxide gas is taken out of the carbonization tower and heat is exchanged through the heat exchanger to transfer the heat to the refrigerant, thereby maintaining the reaction temperature within a stable range.

[0003] In order to prevent a large amount of heat energy from being lost during the heat exchange process, which would cause energy waste, the production workshop where the applicant is located uses a coil to conduct the heat in the carbonization tower into the lime aging pool near the light calcium carbonate carbonization tower. The heat is then brought into contact with the lime slurry in the lime aging pool to exchange heat, thereby keeping the temperature in the carbonization tower stable. At the same time, the heat entering the lime aging pool can increase the aging speed and maturation degree of the lime slurry, thereby reducing the aging time and energy consumption and saving energy costs. However, it was found in subsequent use that due to the poor thermal conductivity of the lime slurry, the lime slurry near the coil is prone to local overheating during the heat exchange process, resulting in low heat exchange efficiency. Utility Model Content

[0004] The utility model aims to provide a heat exchange device for a light calcium carbonate carbonization tower, which can improve heat exchange efficiency and avoid energy waste.

[0005] In order to solve the deficiencies of the above-mentioned technical problems, the utility model adopts the following technical solutions: a heat exchange device for a light calcium carbonate carbonization tower, comprising a lime aging tank and an isolation tube erected in the middle and lower part of the lime aging tank, wherein a filling column coaxially arranged therewith is arranged in the isolation tube, a flow channel for the lime slurry to pass through is formed between the filling column and the isolation tube, a coil surrounding the circumference of the filling column is arranged in the flow channel, one end of the coil passes through the isolation tube and is connected to the heat exchange inlet of the carbonization tower, and the other end of the coil passes through the isolation tube and is connected to the heat exchange outlet of the carbonization tower, and a draw-off component capable of transporting the lime slurry in the flow channel to an area away from the isolation tube is arranged at the lower port of the isolation tube, so that the lime slurry above the isolation tube can enter the flow channel.

[0006] As a further optimization of the heat exchange device for a light calcium carbonate carbonization tower of the utility model, the extraction component is a slurry pump, and a conical slurry outlet is provided at the lower end of the isolation tube, and the conical slurry outlet is connected to the feed port of the slurry pump through a pipeline.

[0007] As a further optimization of the heat exchange device for a light calcium carbonate carbonization tower of the utility model, the extraction component is a conveying auger, and the conveying auger is located below the isolation tube. A conical slurry outlet is provided at the lower end of the isolation tube, and the conical slurry outlet is connected to the feed port of the conveying auger through a pipeline.

[0008] As a further optimization of the heat exchange device for a light calcium carbonate carbonization tower of the utility model, the filling column is a hollow structure.

[0009] As a further optimization of the heat exchange device for a light calcium carbonate carbonization tower of the utility model, a plurality of mounting rods are provided on the outer side of the isolation tube, and a mounting block with a mounting hole is provided at one end of the mounting rod away from the isolation tube.

[0010] As a further optimization of the heat exchange device for a light calcium carbonate carbonization tower of the utility model, a conical drainage hopper is provided at the upper inlet of the isolation tube.

[0011] As a further optimization of the heat exchange device for a light calcium carbonate carbonization tower of the utility model, the isolation tube is cylindrical or square cylindrical.

[0012] As a further optimization of the heat exchange device for a light calcium carbonate carbonization tower of the utility model, the cross section of the tube body of the coil is rhombus-shaped.

[0013] As a further optimization of the heat exchange device for a light calcium carbonate carbonization tower of the utility model, the outer circular side of the filling column is connected to the isolation tube via a connecting rod, and the coil is connected to the connecting rod.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model divides an independent lime slurry area in the lime aging tank through an isolation tube, places the main body of the coil in the isolation tube, and exchanges heat with the coil through the lime slurry in the isolation tube. A withdrawal component is arranged at the bottom of the isolation tube, so that the lime slurry in the isolation tube can be drawn out of the isolation tube, and the lime slurry above the isolation tube flows into the isolation tube, so as to achieve the effect of circulating the lime slurry in the isolation tube, thereby ensuring the stability of the heat exchange of the coil;

[0016] Second, the utility model can prevent lime slurry that does not participate in heat exchange from entering the isolation tube by arranging a filling column in the inner ring of the coil, thereby reducing the extraction amount of the extraction component and improving the circulation and replacement efficiency of the lime slurry in the isolation tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of the heat exchange device of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2The structure of the heat exchange device of the utility model is shown in FIG. Figure 2 ;

[0019] Figure numerals: 1. isolation tube, 2. coil, 3. conical slurry outlet, 4. mounting block, 5. mounting rod, 6. conical drainage bucket, 7. filling column, 8. connecting rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0021] like Figure 1-2 As shown, the utility model provides a heat exchange device for a light calcium carbonate carbonization tower, which can improve the heat exchange efficiency of the light calcium carbonate carbonization tower without wasting energy. The heat exchange device is the same as the prior art, including a lime aging tank and a coil 2 that can be placed in the lime aging tank, one end of the coil 2 is connected to the heat exchange inlet of the carbonization tower, and the other end of the coil 2 is connected to the heat exchange outlet of the carbonization tower. The heat source gas in the carbonization tower forms a gas circuit through the coil 2. When the heat source gas contacts the coil 2, the heat in the carbonization tower is transferred to the coil 2. The heat in the carbonization tower is introduced into the lime slurry in the isolation tube 1 through the coil 2. By contacting with the low-temperature lime slurry, heat exchange is performed, so that the temperature in the carbonization tower is kept stable.

[0022] The heat exchange device of the utility model is different from the prior art in that an upright isolation pipe 1 is provided in the middle and lower part of the lime aging tank, the main body of the coil 2 is located in the isolation pipe 1, a conical drainage bucket 6 is provided at the upper inlet of the isolation pipe 1, the isolation pipe 1 divides an independent lime slurry area, and an extraction component is provided at the lower port of the isolation pipe 1 to transport the lime slurry in the isolation pipe 1 to an area away from the isolation pipe 1, so that the lime slurry above the isolation pipe 1 can enter the isolation pipe 1. The extraction component allows the lime slurry in the isolation pipe 1 to circulate and replace the lime slurry in the isolation pipe 1, thereby ensuring the stability of the heat exchange of the coil 2 and preventing the lime slurry temperature near the coil 2 from being too high, resulting in poor heat exchange performance of the coil 2.

[0023] In this embodiment, there are two structures of the extraction component. One is that the extraction component is a slurry pump, and a conical slurry outlet 3 is provided at the lower end of the isolation pipe 1, and the conical slurry outlet 3 is connected to the feed port of the slurry pump through a pipeline. The lime slurry in the isolation pipe 1 is extracted by the slurry pump. The second is that the extraction component is a conveying auger, and the conveying auger is located below the isolation pipe 1. A conical slurry outlet 3 is provided at the lower end of the isolation pipe 1, and the conical slurry outlet 3 is connected to the feed port of the conveying auger through a pipeline. The lime slurry in the isolation pipe 1 is extracted by the conveying auger.

[0024] There is a space in the inner ring of the coil 2 for the lime slurry to fill. The lime slurry in the center of the space does not participate in the heat exchange of the coil 2 due to the spacing problem. However, the extraction component will also extract this part when extracting the lime slurry in the isolation tube 1, thereby reducing the extraction efficiency. By providing a filling column 7 coaxially arranged with the isolation tube 1 in the ring of the coil 2, a flow channel for the circulation of the lime slurry is formed between the filling column 7 and the isolation tube 1, and the filling column 7 is a hollow structure. Providing the filling column 7 in the inner ring of the coil 2 can prevent the lime slurry that does not participate in the heat exchange from entering the isolation tube 1, can reduce the extraction amount of the extraction component, and improve the circulation and replacement efficiency of the lime slurry in the isolation tube 1.

[0025] In this embodiment, the outer circumferential side of the filling column 7 is connected to the isolation tube 1 via a connecting rod 8 , and the coil 2 is connected to the connecting rod 8 , so that the filling column 7 and the coil 2 are fixed in the isolation tube 1 .

[0026] In this embodiment, the isolation tube 1 has two shapes, one is cylindrical and the other is square. In this embodiment, the cross section of the tube body of the coil 2 is rhombus-shaped, and the rhombus-shaped slope facilitates the lime slurry to flow downward from the coil 2, which is beneficial to the circulation of the lime slurry and improves the heat exchange efficiency.

[0027] In this embodiment, a plurality of mounting rods 5 are provided on the outside of the isolation tube 1, and a mounting block 4 with a mounting hole is provided at one end of the mounting rod 5 away from the isolation tube 1. The bolt body is passed through the mounting hole of the mounting block 4 and then screwed to the side wall of the lime aging tank, so that the isolation tube 1 is fixed in the lime aging tank.

[0028] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various modifications or variations within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. A heat exchange device for a light calcium carbonate carbonization tower, characterized in that: The invention comprises a lime aging tank and an isolation pipe (1) erected in the middle and lower part of the lime aging tank, wherein a packing column (7) coaxially arranged therewith is arranged in the isolation pipe (1), a flow channel for lime slurry to pass through is formed between the packing column (7) and the isolation pipe (1), a coil (2) arranged around the packing column (7) is arranged in the flow channel, one end of the coil (2) passes through the isolation pipe (1) and is connected to the heat exchange inlet of a carbonization tower, and the other end of the coil (2) passes through the isolation pipe (1) and is connected to the heat exchange outlet of the carbonization tower, and an extraction component capable of transporting the lime slurry in the flow channel to a region away from the isolation pipe (1) is arranged at the lower end of the isolation pipe (1), so that the lime slurry above the isolation pipe (1) can enter the flow channel.

2. A heat exchange device for a light calcium carbonate carbonization tower according to claim 1, characterized in that: The extraction component is a slurry pump, and a conical slurry outlet (3) is provided at the lower end of the isolation pipe (1), and the conical slurry outlet (3) is connected to the feed port of the slurry pump through a pipeline.

3. A heat exchange device for a light calcium carbonate carbonization tower according to claim 1, characterized in that: The extraction component is a conveying auger, which is located below the isolation pipe (1). A conical slurry outlet (3) is provided at the lower end of the isolation pipe (1), and the conical slurry outlet (3) is connected to the feed port of the conveying auger through a pipeline.

4. A heat exchange device for a light calcium carbonate carbonization tower according to claim 1, characterized in that: The filling column (7) is a hollow structure.

5. A heat exchange device for a light calcium carbonate carbonization tower according to claim 1, characterized in that: A plurality of mounting rods (5) are provided on the outside of the isolation tube (1), and a mounting block (4) having a mounting hole is provided on one end of the mounting rods (5) away from the isolation tube (1).

6. A heat exchange device for a light calcium carbonate carbonization tower according to claim 1, characterized in that: A conical drainage hopper (6) is provided at the upper inlet of the isolation tube (1).

7. A heat exchange device for a light calcium carbonate carbonization tower according to claim 1, characterized in that: The isolation tube (1) is cylindrical or square.

8. A heat exchange device for a light calcium carbonate carbonization tower according to claim 1, characterized in that: The cross section of the tube body of the coil (2) is rhombus-shaped.

9. A heat exchange device for a light calcium carbonate carbonization tower according to claim 1, characterized in that: The outer circumferential side of the filling column (7) is connected to the isolation tube (1) via a connecting rod (8), and the coil (2) is connected to the connecting rod (8).

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