A two-absorption tower capable of realizing low-level heat recovery

Abstract

The utility model relates to the technical field of low-level heat recovery and utilization in a sulfuric acid preparation process, and in particular to a two-absorption tower capable of realizing low-level heat recovery, comprising a tower body, an air inlet pipe is arranged on the outer side of the tower body, one end of the air inlet pipe is fixedly connected to a connecting pipe, a recovery box is arranged on the outer side of the second gas transmission pipe, a motor is fixedly installed on the base surface of the recovery box, a water inlet is arranged on the outer side of the recovery box, a water outlet is arranged on the outer side of the recovery box away from the water inlet, a second electric-controlled valve is fixedly connected to one end of the water outlet, a filter is fixedly installed on the inner side of the connecting pipe, and in the utility model, the second gas transmission pipe, the first electric-controlled valve, the recovery box, the motor, the second electric-controlled valve, the control panel, the stirring paddle and the water pump are arranged, so as to achieve the effect of heat recovery and utilization, thereby enhancing practicality.

Description

Technical Field

[0001] The utility model relates to the technical field of low-level heat recovery and utilization in a sulfuric acid preparation process, in particular to a secondary absorption tower capable of realizing low-level heat recovery. Background Art

[0002] The commonly used industrial acid production process usually adopts the "two-conversion and two-absorption" production process, that is, the SO2 produced by the calcination of pyrite and sulfur incineration or the SO2 from the smelting flue gas is converted into SO3 for the first time through a converter, and the SO3 generated by the first conversion is then absorbed by an absorption tower, and the SO2 that is not completely converted is passed through the converter for a second conversion. The flue gas after the second conversion is absorbed for the second time through a second absorption tower. The "two-conversion and two-absorption" process is adopted to achieve full conversion and absorption of SO2.

[0003] The existing secondary absorption tower has a poor effect on heat recovery during use, resulting in poor practicality.

[0004] Therefore, it is particularly important to design a secondary absorption tower that can realize low-level heat recovery to change the above technical defects and improve overall practicality. Utility Model Content

[0005] The utility model aims to provide a secondary absorption tower capable of realizing low-level heat recovery, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A double-absorption tower capable of realizing low-level heat recovery comprises a tower body, an air inlet pipe is arranged on the outer side of the tower body, one end of the air inlet pipe is fixedly connected to a connecting pipe, one end of the connecting pipe is fixedly connected to a first air supply pipe, one end of the first air supply pipe is fixedly connected to a second air supply pipe, one end of the second air supply pipe is fixedly connected to a first electrically-controlled valve, a recovery box is arranged on the outer side of the second air supply pipe, a motor is fixedly installed on the base surface of the recovery box, a water inlet is arranged on the outer side of the recovery box, a water outlet is arranged on the outer side of the recovery box away from the water inlet, one end of the water outlet is fixedly connected to the second electrically-controlled valve, and a filter is fixedly installed on the inner side of the connecting pipe.

[0008] As a preferred solution of the utility model, one end of the first electrically controlled valve is fixedly connected to an air outlet pipe.

[0009] As a preferred solution of the utility model, a control panel is fixedly installed on a side of the base surface of the recycling box close to the motor, and the control panel is electrically connected to the first electric-controlled valve, the motor, and the second electric-controlled valve.

[0010] As a preferred solution of the utility model, the output end of the motor is connected to a stirring shaft via a coupling, a stirring paddle is fixedly connected to the outside of the stirring shaft at equal distances, and a bearing is provided at one end of the stirring shaft.

[0011] As a preferred solution of the utility model, one end of the water inlet is connected to a water pump.

[0012] As a preferred solution of the present utility model, the number of the filter screen is one.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] In the utility model, a second gas pipeline, a first electrically-controlled valve, a recovery box, a motor, a second electrically-controlled valve, a control panel, a stirring paddle and a water pump are arranged in a two-absorption tower capable of realizing low-level heat recovery, so that the water pump is turned on to inject water into the interior of the recovery box, and the effect of heat energy recovery and utilization is achieved with the cooperation of the second gas pipeline, the first electrically-controlled valve, the motor, the second electrically-controlled valve, the control panel and the stirring paddle, thereby enhancing practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the connecting pipe and the filter screen of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the second gas transmission pipe of the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the motor, stirring shaft and stirring paddle of the utility model.

[0019] In the figure: 1. tower body; 2. air inlet pipe; 3. connecting pipe; 4. first air supply pipe; 5. second air supply pipe; 6. first electric-controlled valve; 7. recovery box; 8. motor; 9. water inlet; 10. water outlet; 11. second electric-controlled valve; 12. filter; 13. air outlet pipe; 14. control panel; 15. stirring shaft; 16. stirring paddle; 17. water pump. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively with reference to the relevant drawings below. Several embodiments of the utility model are given. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0024] For examples, see Figure 1-4 , the utility model provides a technical solution:

[0025] A two-absorption tower capable of realizing low-level heat recovery comprises a tower body 1, an air inlet pipe 2 is arranged on the outside of the tower body 1, one end of the air inlet pipe 2 is fixedly connected to a connecting pipe 3, one end of the connecting pipe 3 is fixedly connected to a first air supply pipe 4, one end of the first air supply pipe 4 is fixedly connected to a second air supply pipe 5, one end of the second air supply pipe 5 is fixedly connected to a first electric-controlled valve 6, a recovery box 7 is arranged on the outside of the second air supply pipe 5, a motor 8 is fixedly installed on the base surface of the recovery box 7, a water inlet 9 is arranged on the outside of the recovery box 7, and the outside of the recovery box 7 is far away from the water inlet A water outlet 10 is provided on one side of the outlet 9, and a second electrically controlled valve 11 is fixedly connected to one end of the water outlet 10, so that the water pump 17 is turned on to inject water into the interior of the recovery box 7, and the tower body 1 discharges the gas into the interior of the second gas pipeline 5 through the air inlet pipe 2, the connecting pipe 3 and the first gas pipeline 4. The water heats up after contacting the surface of the second gas pipeline 5, thereby achieving heat energy recovery and utilization. At the same time, the motor 8 is driven by the control panel 14, and the effect of heat energy recovery and utilization is improved under the cooperation of the first electrically controlled valve 6, the second electrically controlled valve 11 and the stirring paddle 16;

[0026] One end of the first electrically controlled valve 6 is fixedly connected to an air outlet pipe 13, a control panel 14 is fixedly installed on the side of the base surface of the recovery box 7 close to the motor 8, and the control panel 14 is electrically connected to the first electrically controlled valve 6, the motor 8, and the second electrically controlled valve 11, the output end of the motor 8 is connected to a stirring shaft 15 through a coupling, a stirring paddle 16 is fixedly connected to the outside of the stirring shaft 15 at an equal distance, and a bearing is provided at one end of the stirring shaft 15, and a water pump 17 is connected to one end of the water inlet 9, so that the water pump 17 is turned on to inject water into the interior of the recovery box 7, and the tower body 1 discharges the gas into the interior of the second gas pipe 5 through the air inlet pipe 2, the connecting pipe 3 and the first gas pipe 4. The water is heated up after contacting the surface of the second gas pipe 5, thereby achieving heat recovery and utilization. At the same time, the motor 8 is driven by the control panel 14, and the stirring shaft 15 and the stirring paddle 16 are driven to rotate under the action of the coupling, and the stirring water accelerates the temperature increase. The first electric-controlled valve 6 is opened through the control panel 14 to discharge the gas, and the second electric-controlled valve 11 is opened through the control panel 14 to discharge the water, thereby improving the effect of heat recovery and utilization and enhancing practicality.

[0027] In this embodiment, please refer to Figure 1 and Figure 2 , a filter screen 12 is fixedly installed on the inner side of the connecting pipe 3, so that the gas is filtered through the filter screen 12;

[0028] There is only one filter screen 12 , so when the gas enters the connecting pipe 3 , the filter screen 12 filters the gas, further enhancing the practicality.

[0029] The working process of the utility model is as follows: when in use, check whether the appearance of the equipment is damaged. After the inspection, power on the equipment, turn on the water pump 17, and inject water into the interior of the recovery box 7. The tower body 1 discharges the gas to the interior of the second gas pipe 5 through the air inlet pipe 2, the connecting pipe 3 and the first gas pipe 4. The water heats up after contacting the surface of the second gas pipe 5 to achieve heat recovery. At the same time, the motor 8 is driven by the control panel 14, and the stirring shaft 15 and the stirring paddle 16 are driven to rotate under the action of the coupling, and the stirring water accelerates the temperature increase. The first electric-controlled valve 6 is opened through the control panel 14 to discharge the gas, and the second electric-controlled valve 11 is opened through the control panel 14 to discharge the water, thereby improving the effect of heat recovery. Among them, the filter screen 12 filters the gas, which enhances the practicality and has promotion value.

[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 secondary absorption tower capable of realizing low-level heat recovery, comprising a tower body (1), characterized in that: An air inlet pipe (2) is provided on the outside of the tower body (1), one end of the air inlet pipe (2) is fixedly connected to a connecting pipe (3), one end of the connecting pipe (3) is fixedly connected to a first air supply pipe (4), one end of the first air supply pipe (4) is fixedly connected to a second air supply pipe (5), one end of the second air supply pipe (5) is fixedly connected to a first electric control valve (6), a recovery box (7) is provided on the outside of the second air supply pipe (5), a motor (8) is fixedly installed on the base surface of the recovery box (7), a water inlet (9) is provided on the outside of the recovery box (7), a water outlet (10) is provided on the side of the outside of the recovery box (7) away from the water inlet (9), one end of the water outlet (10) is fixedly connected to a second electric control valve (11), and a filter (12) is fixedly installed on the inside of the connecting pipe (3).

2. A secondary absorption tower capable of realizing low-level heat recovery according to claim 1, characterized in that: One end of the first electrically controlled valve (6) is fixedly connected to an air outlet pipe (13).

3. The secondary absorption tower capable of realizing low-level heat recovery according to claim 1, characterized in that: A control panel (14) is fixedly mounted on a side of the base surface of the recovery box (7) close to the motor (8), and the control panel (14) is electrically connected to the first electrically controlled valve (6), the motor (8), and the second electrically controlled valve (11).

4. The secondary absorption tower capable of realizing low-level heat recovery according to claim 1, characterized in that: The output end of the motor (8) is connected to a stirring shaft (15) via a coupling, a stirring paddle (16) is fixedly connected to the outside of the stirring shaft (15) at equal distances, and a bearing is provided at one end of the stirring shaft (15).

5. The secondary absorption tower capable of realizing low-level heat recovery according to claim 1, characterized in that: One end of the water inlet (9) is connected to a water pump (17).

6. The secondary absorption tower capable of realizing low-level heat recovery according to claim 1, characterized in that: The number of the filter screen (12) is one.

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