Pre-drying system for activated carbon regeneration

Abstract

The utility model relates to the technical field of activated carbon regeneration, and discloses a pre-drying system for activated carbon regeneration, which comprises a regeneration tower main body, and the regeneration tower main body comprises a heating section and a cooling section which are sequentially arranged from top to bottom; and the cooling section consists of an inner cavity of the regeneration tower main body and a heat exchanger arranged in the inner cavity. Through the arrangement of the plurality of activated carbon storage tanks and the heat exchanger in the cooling section, during use, cold air can be conveyed into the cooling section through the air conveying equipment to exchange heat with the interior of the regeneration tower main body, so that heat is taken out and conveyed into the activated carbon storage tanks, and the heat exchange efficiency is improved. The waste activated carbon in the activated carbon storage tank is pre-dried, waste heat is effectively utilized, moisture in the waste activated carbon is further removed, pretreatment is performed for subsequent regeneration heating, and the use effect is extremely good.

Description

Technical Field

[0001] The utility model relates to the technical field of activated carbon regeneration, in particular to a pre-drying system for activated carbon regeneration. Background Art

[0002] At present, the activated carbon method has been widely used in flue gas purification technologies in power plants, steel and other industries. As a solid-phase dry adsorption and removal technology for pollutants, the activated carbon method has a broad spectrum of absorption and can simultaneously purify pollutants such as SO2, NOx, organic matter, tar, heavy metals, dust, etc. in flue gas. The purification efficiency is high and the system does not require water consumption, does not produce secondary pollution, and sulfur resources can be recovered through the regeneration of activated carbon. At the same time, this compact integrated purification process also greatly shortens the purification process. After desulfurization and denitrification, the activated carbon loses its activity and must be regenerated before it can be recycled. Activated carbon regeneration is divided into water washing regeneration and thermal regeneration. The by-product of water washing regeneration is dilute sulfuric acid, which is inconvenient to use and has strong corrosiveness. Currently, thermal regeneration is the widely used method.

[0003] CN205815723U discloses an activated carbon regeneration system, including an activated carbon regeneration device, a catalytic burner, a catalytic blower, a heat exchanger, a liquid nitrogen protection device, and a controller. The activated carbon regeneration device, the catalytic burner, the catalytic blower, and the heat exchanger are sequentially connected via an air pipe to form a regeneration catalytic pipeline loop. The liquid nitrogen protection device is connected to the activated carbon regeneration device via a pipeline. The heat exchanger is also provided with an air inlet and an exhaust port. The activated carbon regeneration device, the catalytic burner, the catalytic blower, the heat exchanger, and the liquid nitrogen protection device are connected to the controller signal. The regeneration system has a simple and reasonable structure and high catalytic regeneration efficiency for activated carbon, but the energy utilization rate is not high. Since the activated carbon thermal regeneration requires a high temperature, the heat utilization in the current patent design is relatively dispersed, and there is a lot of waste heat waste, so that the effective utilization rate of energy is not very high, which increases the processing cost. Utility Model Content

[0004] The purpose of the utility model is to solve the problems existing in the prior art and to propose a pre-drying system for activated carbon regeneration.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A pre-drying system for activated carbon regeneration, comprising a regeneration tower body, wherein the regeneration tower body comprises a heating section and a cooling section arranged in sequence from top to bottom;

[0007] The cooling section is composed of the inner cavity of the regeneration tower body and a heat exchanger arranged in the inner cavity;

[0008] It also includes several activated carbon storage tanks. The input end of the heat exchanger is connected to the air conveying equipment through a pipeline. The output end of the heat exchanger is connected to the interior of several activated carbon storage tanks through pipelines, and a first control valve is provided on the several output ends of the pipeline.

[0009] Preferably, an exhaust pipe is provided at the top of the activated carbon storage tank, a discharge pipe is provided at the bottom of the activated carbon storage tank, and a second control valve is provided on the discharge pipe.

[0010] Preferably, a single chip microcomputer is further included, the first control valve and the second control valve are both electrically connected to the single chip microcomputer, and the first control valve and the second control valve are both solenoid valves.

[0011] Preferably, the inner wall of the activated carbon storage tank is provided with a heat exchange insulation layer, the output end pipeline of the heat exchanger is connected to the bottom of the heat exchange insulation layer through the bottom of the activated carbon storage tank, and the exhaust pipe is connected to the top of the heat exchange insulation layer.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model has several activated carbon storage tanks and heat exchangers in the cooling section. When in use, cold air can be transported into the cooling section through the air conveying equipment to exchange heat with the interior of the regeneration tower body, thereby taking out the heat and transporting the heat to the interior of the activated carbon storage tank to pre-dry the waste activated carbon in the activated carbon storage tank. This not only effectively utilizes the waste heat, but also further removes the moisture inside the waste activated carbon, and performs pretreatment for subsequent regeneration heating, with excellent use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the composition of a pre-drying system for activated carbon regeneration proposed in the present utility model;

[0015] Figure 2 This is a schematic diagram of the interior of an activated carbon storage tank of a pre-drying system for activated carbon regeneration proposed in the utility model.

[0016] In the figure: 1. Regeneration tower body; 2. Heating section; 3. Cooling section; 4. Heat exchanger; 5. Activated carbon storage tank; 6. Air conveying equipment; 7. First control valve; 8. Exhaust pipe; 9. Discharge pipe; 10. Second control valve; 11. Single chip microcomputer; 12. Heat exchange insulation. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Reference Figure 1 and Figure 2 , a pre-drying system for activated carbon regeneration, comprising a regeneration tower body 1, wherein the regeneration tower body 1 comprises a heating section 2 and a cooling section 3 arranged in sequence from top to bottom;

[0019] The cooling section 3 is composed of the inner cavity of the regeneration tower body 1 and the heat exchanger 4 arranged in the inner cavity. The heat exchanger 4 can be arranged in the form of a copper tube in the regeneration tower body 1. When air enters the copper tube, it can take away the heat inside the regeneration tower body 1, realizing the cooling function of the cooling section 3. At the same time, the waste heat is utilized in the activated carbon storage tank 5.

[0020] It also includes several activated carbon storage tanks 5. The input end of the heat exchanger 4 is connected to the air conveying equipment 6 through a pipeline. The air conveying equipment 6 is a fan. The output end of the heat exchanger 4 is connected to the interior of several activated carbon storage tanks 5 through pipelines, and a first control valve 7 is provided on several output ends of the pipeline.

[0021] By setting up several activated carbon storage tanks 5 and the heat exchanger 4 in the cooling section 3, when in use, cold air can be transported into the cooling section 3 through the air conveying equipment 6 to exchange heat with the interior of the regeneration tower body 1, thereby taking out the heat and transporting the heat to the interior of the activated carbon storage tank 5 (the material enters the regeneration tower from the feed port at the top of the regeneration tower and is discharged from the discharge port at the bottom of the regeneration tower. During this process, the material is heated by the heat), and the waste activated carbon inside the activated carbon storage tank 5 is pre-dried, which not only effectively utilizes the waste heat, but also further removes the moisture inside the waste activated carbon, and pre-treats it for subsequent regeneration heating, with excellent use effect.

[0022] In this embodiment, an exhaust pipe 8 is provided at the top of the activated carbon storage tank 5, a discharge pipe 9 is provided at the bottom of the activated carbon storage tank 5, and a second control valve 10 is provided on the discharge pipe 9. The exhaust pipe 8 is used to discharge water vapor when the waste activated carbon is dried in the activated carbon storage tank 5, and the second control valve 10 is used to control the discharge of the waste activated carbon, which can be transported to the regeneration tower body 1 through a chain bucket conveyor.

[0023] In this embodiment, a single-chip microcomputer 11 is also included. The first control valve 7 and the second control valve 10 are both electrically connected to the single-chip microcomputer 11. The first control valve 7 and the second control valve 10 are both solenoid valves. The control signals of the first control valve 7 and the second control valve 10 can be sent to the single-chip microcomputer 11. The single-chip microcomputer 11 controls the first control valve 7 according to the control signal of the second control valve 10 (when the second control valve 10 is open, it means that the activated carbon storage tank 5 is discharging and does not need pre-drying, then the corresponding first control valve 7 is closed, and other first control valves 7 can be opened).

[0024] In this embodiment, the inner wall of the activated carbon storage tank 5 is provided with a heat exchange insulation layer 12. The material of the heat exchange insulation layer 12 is copper, and the thermal conductivity of copper is used to achieve heating. The output end pipeline of the heat exchanger 4 is connected to the bottom of the heat exchange insulation layer 12 through the bottom of the activated carbon storage tank 5, and the exhaust pipe 8 is connected to the top of the heat exchange insulation layer 12. The heated gas is heated by the heat exchange insulation layer 12 and the waste activated carbon in the activated carbon storage tank 5 to achieve pre-drying.

[0025] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pre-drying system for activated carbon regeneration, comprising a regeneration tower body, characterized in that: The regeneration tower body includes a heating section and a cooling section arranged in sequence from top to bottom; The cooling section is composed of the inner cavity of the regeneration tower body and a heat exchanger arranged in the inner cavity; It also includes several activated carbon storage tanks. The input end of the heat exchanger is connected to the air conveying equipment through a pipeline. The output end of the heat exchanger is connected to the interior of several activated carbon storage tanks through pipelines, and a first control valve is provided on the several output ends of the pipeline.

2. A pre-drying system for activated carbon regeneration according to claim 1, characterized in that: An exhaust pipe is provided on the top of the activated carbon storage tank, a discharge pipe is provided on the bottom of the activated carbon storage tank, and a second control valve is provided on the discharge pipe.

3. A pre-drying system for activated carbon regeneration according to claim 2, characterized in that: It also includes a single chip microcomputer, the first control valve and the second control valve are both electrically connected to the single chip microcomputer, and the first control valve and the second control valve are both solenoid valves.

4. A pre-drying system for activated carbon regeneration according to claim 2, characterized in that: The inner wall of the activated carbon storage tank is provided with a heat exchange insulation layer. The output end pipeline of the heat exchanger is connected to the bottom of the heat exchange insulation layer through the bottom of the activated carbon storage tank, and the exhaust pipe is connected to the top of the heat exchange insulation layer.

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