Desulfurization regeneration tank liquid level adjusting and foam flotation device

Abstract

The utility model belongs to the technical field of gas purification, and particularly relates to a desulfurization regeneration tank liquid level adjusting and froth flotation device which is characterized by comprising an inner cylinder, a communicating pipe, an outer cylinder, a lifting screw rod, a limiting tank, a pressure equalizing rod and a horizontal rod, a desulfurization liquid outlet pipe is arranged on one side of the bottom of the outer cylinder, and the top of the outer cylinder is connected with an upper cover. The bottom of the outer cylinder is hermetically connected with a communicating pipe, the bottom of the communicating pipe is a desulfurization liquid inlet, and the desulfurization liquid inlet is communicated with the desulfurization regeneration tank through a flange; an inner cylinder is arranged in the communicating pipe, the top of the inner cylinder is connected with a horizontal rod, the horizontal rod is connected with the bottom end of the lifting screw, and the length of the horizontal rod is larger than the diameter of the communicating pipe; the outer diameter of the inner cylinder is vertically connected with a plurality of pressure equalizing rods, and the ends of the pressure equalizing rods are located in limiting grooves formed in the inner wall of the outer cylinder and slide up and down along with the lifting screw. The liquid level control device has the beneficial effects that the liquid level of the regeneration tank is controlled by adopting a communicating vessel principle, and the mechanism is convenient and reliable to move.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal gas purification, and in particular relates to a desulfurization regeneration tank liquid level adjustment and foam flotation device. Background Art

[0002] Gas purification refers to the treatment of coal gas containing various impurities to purify it to meet national emission standards and other specific industrial needs. Gas purification is widely used, mainly including the use of coal gas for power generation, energy conversion, chemical manufacturing and other fields, thereby greatly improving energy utilization and environmental protection. The methods of coal gas purification are divided into physical, chemical and biological methods. Among them, the physical method is suitable for separation, washing, desulfurization and dehydration processes. The chemical method refers to the use of chemical reactions to purify coal gas. The biological method is the application of microorganisms in the process of coal gas purification.

[0003] During the coalification process, about one-third of the sulfur is converted into sulfides such as H2S, which become impurities in coal gas. If H2S is not removed from coal gas, it will seriously corrode equipment during transportation; it will pollute the environment and harm human health when used as a civilian fuel; and it will seriously affect the quality of steel products when used as a metallurgical fuel. In the PDS desulfurization, the sulfur in the regeneration tank after regeneration of the desulfurization liquid exists in the form of sulfur foam, which is suspended in large quantities on the top of the regeneration tank. In order to facilitate the flotation of sulfur foam and adjust the reaction level of the regeneration tank, the common method is to increase the desulfurization liquid level, which seriously affects the water balance of the desulfurization system.

[0004] The Chinese utility model patent with application number 202221522334.1 discloses an ear slot structure of a desulfurization regeneration tank, including a tower body, a tank chamber is opened in the tower body, a plurality of baffles are fixedly installed on the tank chamber wall, and overflow ports connected to the tank chamber are symmetrically opened on the side wall of the tower body; the height of the baffle is 6500 mm; the height of the overflow port is 7000 mm; an ejector is provided at the top of the tower body, and a tail pipe connected to the ejector is provided at the bottom of the ejector, and the tail pipe is located at the bottom of the tank chamber. This structure can reduce the ear slot overflow port by 500mm and the baffle by 500mm on the basis of the original regeneration tank, thereby improving the flotation quality of the regeneration tank foam. Its disadvantage is that its connection with the desulfurization regeneration tank is fixed, and it cannot play the role of liquid level regulation. Utility Model Content

[0005] The purpose of the utility model is to provide a desulfurization regeneration tank liquid level adjustment and foam flotation device, which overcomes the shortcomings of the prior art, adopts the principle of a communicating vessel, and by installing the device inside the regeneration tank, the device is connected to the regeneration tank liquid level, and the actuator adjusts the movement of the lifting screw of the device to drive the inner cylinder of the device to achieve the change of the liquid level in the device, and then the change of the regeneration tank liquid level. When the subsequent sulfur foam treatment system of desulfurization has a change requirement for the amount and concentration of sulfur foam, the amount and concentration of sulfur foam can be controlled by this system to achieve the effect of adjusting the liquid level and controlling the sulfur foam.

[0006] To achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A desulfurization regeneration tank liquid level adjustment and foam flotation device, characterized in that it includes an inner cylinder, a connecting pipe, an outer cylinder, a lifting screw, a limiting groove, a pressure equalizing rod and a horizontal rod. A desulfurization liquid outlet pipe is provided on one side of the bottom of the outer cylinder, and the top of the outer cylinder is connected to the upper cover. The bottom of the outer cylinder is sealed with the connecting pipe. The bottom of the connecting pipe is a desulfurization liquid inlet, and the desulfurization liquid inlet is connected to the desulfurization regeneration tank through a flange; an inner cylinder is provided in the connecting pipe, and a horizontal rod is connected to the top of the inner cylinder. The horizontal rod is connected to the bottom end of the lifting screw. The length of the horizontal rod is greater than the diameter of the connecting pipe, and the top of the lifting screw passes through the upper cover and is located on the outside of the upper cover; a plurality of pressure equalizing rods are vertically connected to the outer diameter of the inner cylinder, and the ends of the pressure equalizing rods are located in the limiting grooves provided on the inner wall of the outer cylinder and slide up and down with the lifting screw.

[0008] Furthermore, the upper cover is connected to the top end of the outer cylinder through a flange.

[0009] Furthermore, a gap of 20-30 mm is left between the outer diameter of the inner cylinder and the inner diameter of the connecting pipe.

[0010] Furthermore, a balanced air inlet is provided on the upper cover.

[0011] Furthermore, the top of the lifting screw is connected to a lifting drive device.

[0012] Furthermore, the lifting drive device is a manual or electric screw lift.

[0013] Furthermore, the lifting screw is marked with scales.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) The structure is simple. The liquid level of the regeneration tank is controlled by adopting the principle of communicating vessels. The combined structure of the inner and outer cylinders and the fixed connection of the lifting screw are used for driving. The movement of the mechanism is convenient and reliable.

[0016] 2) Simple operation. The power system is only the execution structure on the upper part of the lifting screw. The scale on the lifting screw can realize accurate control of the liquid level. The observation is direct, avoiding production fluctuations caused by misoperation, and achieving the purpose of controlling the water balance of the desulfurization system and the concentration stability of the sulfur foam treatment unit;

[0017] 3) Easy maintenance, the device body is all structural parts, and flange connection is adopted, which is easy to replace and repair, with long service life and stable effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 Section view along line AA.

[0020] In the figure: 1-connecting pipe, 2-inner cylinder, 3-outer cylinder, 4-lifting screw, 5-upper cover, 6-balanced air inlet, 7-limiting groove, 8-pressure equalizing rod, 9-horizontal rod, a-desulfurization liquid inlet, b-desulfurization liquid outlet. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the specific embodiments required to be used in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some implementation methods of the utility model. For ordinary technicians in this field, other specific embodiments can be obtained based on these specific embodiments without paying creative work.

[0023] The components of the embodiments of the present invention generally described and shown in the specific embodiments herein can be arranged and designed in countless different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the utility model claimed, but only represents the selected embodiments of the utility model.

[0024] See Figure 1-Figure 2, is a schematic structural diagram of an embodiment of a desulfurization regeneration tank liquid level adjustment and foam flotation device of the utility model, comprising an inner cylinder 2, a connecting pipe 1, an outer cylinder 3, a lifting screw 4, a limit groove 7, a pressure equalizing rod 8 and a horizontal rod 9. A desulfurization liquid outlet b pipe is provided on one side of the bottom of the outer cylinder 3, the top of the outer cylinder 3 is connected to the upper cover 5, and the upper cover 5 is connected to the top of the outer cylinder 3 through a flange. A balanced air inlet 6 is provided on the upper cover 5, and the balanced air inlet 6 is used to replenish air to the inner cylinder 2 when a large amount of liquid flows out through the desulfurization liquid outlet b.

[0025] The bottom of the outer tube 3 is sealed and connected to the connecting pipe 1. The bottom of the connecting pipe 1 is the desulfurization liquid inlet a, which is connected to the desulfurization regeneration tank through a flange. The connecting pipe 1 is provided with an inner tube 2. The top of the inner tube 2 is connected with a horizontal rod 9. The horizontal rod 9 is connected to the bottom end of the lifting screw 4. The length of the horizontal rod 9 is greater than the diameter of the connecting pipe 1. The top of the lifting screw 4 passes through the upper cover 5 and is located outside the upper cover 5. The top of the lifting screw 4 is connected to the lifting drive device. The lifting drive device is an electric screw lift. The lifting screw 4 is engraved with scales. The lifting screw 4 drives the horizontal rod 9 to move up and down, thereby driving the inner tube 2 to achieve the change of the liquid level height difference.

[0026] The limit groove 7 limits the upward and downward movement of the horizontal rod 9 to prevent rotation;

[0027] The outer diameter of the inner tube 2 is vertically connected with a plurality of equalizing rods 8, the ends of which are located in the limiting grooves 7 provided on the inner wall of the outer tube 3, and slide up and down along the limiting grooves 7 with the rotation of the lifting screw 4. When the equalizing rods 8 fall on the upper side of the connecting pipe 1, the lowest point where the inner tube 2 can fall is guaranteed, which also serves as a limiting function.

[0028] A gap of 20-30 mm is left between the outer diameter of the inner tube 2 and the inner diameter of the connecting pipe 1, and this gap will not cause foam leakage under the action of the foam surface tension.

[0029] When the device of the utility model is working, the liquid in the regeneration tank is connected with the device through the desulfurization liquid inlet a of the device and enters the interior of the device; the electric screw lift is driven to drive the lifting screw 4 to move upward. The lifting screw 4 drives the horizontal rod 9 and the inner tube 2 to move upward, and the liquid level of the desulfurization liquid in the inner tube is raised. When the liquid level is higher than the upper limit of the inner tube 2 (according to the principle of the communicating vessel, the liquid level inside the regeneration tank is raised synchronously at this time), the liquid level will enter the outer tube 3, and then return to the desulfurization section through the desulfurization liquid outlet b; when the liquid level inside the regeneration tank is too high, the liquid level needs to be lowered, and at this time the electric screw lift is reversed to drive the lifting screw 4 to move downward.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A desulfurization regeneration tank level adjustment and foam flotation device, characterized in that: It includes an inner cylinder, a connecting pipe, an outer cylinder, a lifting screw, a limiting groove, a pressure equalizing rod and a horizontal rod. A desulfurization liquid outlet pipe is provided on one side of the bottom of the outer cylinder. The top of the outer cylinder is connected to the upper cover. The bottom of the outer cylinder is sealed and connected to the connecting pipe. The bottom of the connecting pipe is the desulfurization liquid inlet, and the desulfurization liquid inlet is connected to the desulfurization regeneration tank through a flange. An inner cylinder is provided in the connecting pipe. A horizontal rod is connected to the top of the inner cylinder. The horizontal rod is connected to the bottom end of the lifting screw. The length of the horizontal rod is greater than the diameter of the connecting pipe. The top of the lifting screw passes through the upper cover and is located on the outside of the upper cover. A number of pressure equalizing rods are vertically connected to the outer diameter of the inner cylinder. The end of the pressure equalizing rod is located in the limiting groove provided on the inner wall of the outer cylinder and slides up and down with the lifting screw.

2. A desulfurization regeneration tank liquid level adjustment and froth flotation device according to claim 1, characterized in that: The upper cover is connected to the top end of the outer cylinder through a flange.

3. A desulfurization regeneration tank liquid level adjustment and froth flotation device according to claim 1, characterized in that: A gap of 20-30 mm is left between the outer diameter of the inner cylinder and the inner diameter of the connecting pipe.

4. A desulfurization regeneration tank liquid level adjustment and froth flotation device according to claim 1, characterized in that: The upper cover is provided with a balanced air inlet.

5. A desulfurization regeneration tank liquid level adjustment and froth flotation device according to claim 1, characterized in that: The top of the lifting screw is connected to a lifting drive device.

6. A desulfurization regeneration tank liquid level adjustment and froth flotation device according to claim 5, characterized in that: The lifting drive device is a manual or electric screw lift.

7. A desulfurization regeneration tank liquid level adjustment and froth flotation device according to claim 1, characterized in that: The lifting screw rod is engraved with scales.

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