Improved drying tower for preparing solid caustic soda from liquid

Abstract

The utility model discloses an improved drying tower for preparing solid caustic soda from liquid, which relates to the technical field of solid caustic soda processing, and comprises a cyclone separator and a recovery component, the upper end of the cyclone separator is connected with a gas supply pipe, and the upper end of the gas supply pipe is connected with a waste gas treatment box; the recovery assembly used for recovering heat energy is arranged in the waste gas treatment box and comprises a recovery disc, a liquid outlet pipe, a communicating pipe, a liquid inlet pipe and a central pipe, the liquid outlet pipe is installed on the right side of the upper end of the recovery disc, and the communicating pipe is installed on the inner side of the side edge of the recovery disc. According to the improved drying tower for preparing the solid caustic soda from the liquid, residual heat in waste gas flow during drying is recycled through flowing water liquid in the recycling disc, the recycled heat can be used for other steps for drying the solid caustic soda, energy is saved, the liquid inlet pipe is matched with the communicating pipe to sequentially send the water liquid into the recycling disc, and the recycling efficiency is improved. And after the liquid outlet pipe is closed, the central pipe opens a pipeline, so that the water liquid circulates in the four recovery discs.

Description

Technical Field

[0001] This utility model relates to the field of solid caustic soda processing technology, specifically to an improved liquid-to-solid caustic soda drying tower. Background Technology

[0002] The drying tower for preparing solid caustic soda (sodium hydroxide, NaOH) from liquid is a key piece of equipment in the caustic soda evaporation concentration-crystallization-drying process. It is mainly used to convert liquid caustic soda (usually a 30-50% concentrated caustic soda solution) into solid flakes, granules, or powders. The drying tower is required when preparing solid caustic soda from liquid.

[0003] However, existing exhaust gas processors are not very effective at treating exhaust gases, and the filters they use are not easy to clean. Summary of the Invention

[0004] The purpose of this invention is to provide an improved drying tower for the preparation of solid caustic soda from liquid, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an improved liquid-to-solid caustic soda drying tower, comprising a cyclone separator and a recovery component. The upper end of the cyclone separator is connected to an air supply pipe, and the upper end of the air supply pipe is connected to a waste gas treatment box. The recovery component for recovering heat energy is disposed inside the waste gas treatment box, and the recovery component includes a recovery plate, a liquid outlet pipe, a connecting pipe, a liquid inlet pipe, and a central pipe. The liquid outlet pipe is installed on the upper right side of the recovery plate, and the connecting pipe is installed on the inner side of the side of the recovery plate. The liquid inlet pipe is installed on the lower right side of the recovery plate, and the central pipe is installed at the center end of the recovery plate.

[0006] Furthermore, the number of the recycling trays is set to four, and the recycling trays and the connecting pipes are distributed alternately on the left and right.

[0007] Furthermore, an exhaust pipe is installed on the top of the exhaust gas treatment box, and a filter assembly for exhaust gas filtration is provided on the inner side of the recovery tray.

[0008] Furthermore, the filtration assembly includes a filter membrane and activated carbon, with the activated carbon disposed below the filter membrane.

[0009] Furthermore, the recovery disc and the filter membrane are spaced apart, and the recovery disc and the activated carbon filter are spaced apart.

[0010] Furthermore, a feeding pipe is connected to the side of the cyclone separator, and a drying chamber is connected to the upper end of the feeding pipe.

[0011] Furthermore, a hot air inlet duct is installed on the rear side of the drying chamber, and a sprayer is installed on the top of the drying chamber.

[0012] Furthermore, the top of the sprayer is connected to a wet material delivery pipe, and the end of the wet material delivery pipe is connected to a wet material tank.

[0013] This invention provides an improved drying tower for the preparation of solid caustic soda from liquid, which has the following advantages:

[0014] 1. This utility model recovers and utilizes the residual heat in the exhaust gas flow during drying by using the flowing water inside the recovery pan. The recovered heat can be used for other steps in the drying of solid caustic soda, saving energy. The evenly distributed round holes on the surface of the recovery pan are used for the flow of exhaust gas. The liquid inlet pipe and the connecting pipe sequentially send the water into the recovery pan. After the liquid outlet pipe is closed, the central pipe opens the pipeline so that the water circulates in the four recovery pans.

[0015] This invention uses two sets of filter membranes and activated carbon inserted into the inside of the recovery tray to filter waste gas, and also increases the contact time between the waste gas and the recovery tray, thereby improving the heat recovery effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an improved liquid-to-solid caustic soda drying tower according to the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of the waste gas treatment box of an improved liquid-to-solid caustic soda drying tower according to the present invention.

[0018] Figure 3 This is a schematic diagram of the recovery component structure of an improved liquid-to-solid caustic soda drying tower according to the present invention.

[0019] In the diagram: 1. Cyclone separator; 2. Air supply pipe; 3. Waste gas treatment box; 4. Recovery assembly; 401. Recovery tray; 402. Liquid outlet pipe; 403. Connecting pipe; 404. Liquid inlet pipe; 405. Central pipe; 5. Exhaust pipe; 6. Filter assembly; 601. Filter membrane; 602. Filter activated carbon; 7. Feeding pipe; 8. Drying box; 9. Hot air inlet pipe; 10. Sprayer; 11. Wet liquid delivery pipe; 12. Wet material box. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] like Figure 1 and Figure 2As shown, an improved liquid-to-solid caustic soda drying tower includes a cyclone separator 1 and a recovery assembly 4. The upper end of the cyclone separator 1 is connected to an air supply pipe 2, and the upper end of the air supply pipe 2 is connected to a waste gas treatment box 3. An exhaust pipe 5 is installed on the top of the waste gas treatment box 3. A filter assembly 6 for waste gas filtration is provided inside the recovery tray 401. The filter assembly 6 includes a filter membrane 601 and activated carbon 602, with the activated carbon 602 positioned below the filter membrane 601. The filter membranes 601 and activated carbon 602 are arranged in pairs, interspersed in the recovery tray 4. The inner side of 01 serves to filter exhaust gas and also increases the contact time between exhaust gas and recovery disc 401, improving heat recovery efficiency. Recovery disc 401 and filter membrane 601 are distributed alternately, and recovery disc 401 and filter activated carbon 602 are also distributed alternately. A feeding pipe 7 is connected to the side of cyclone separator 1, and a drying box 8 is connected to the upper end of the feeding pipe 7. A hot air inlet pipe 9 is installed on the rear side of the drying box 8, and a sprayer 10 is installed on the top of the drying box 8. A wet liquid feeding pipe 11 is connected to the top of the sprayer 10, and a wet material box 12 is connected to the end of the wet liquid feeding pipe 11.

[0022] like Figure 3 As shown, the heat recovery assembly 4 is installed inside the waste gas treatment box 3. The recovery assembly 4 includes a recovery plate 401, a liquid outlet pipe 402, a connecting pipe 403, a liquid inlet pipe 404, and a central pipe 405. The liquid outlet pipe 402 is installed on the right side of the upper end of the recovery plate 401. The evenly distributed circular holes on the surface of the recovery plate 401 are used for the flow of waste gas. There are four recovery plates 401, and the recovery plates 401 and the connecting pipe 403 are distributed alternately on the left and right sides. The water flowing inside the recovery plate 401 dries the waste gas. The residual heat in the airflow is recovered and utilized, allowing the recovered heat to be used in other steps of solid caustic soda drying, saving energy. The inner side of the recovery tray 401 is connected to the connecting pipe 403, and the lower right side of the recovery tray 401 is equipped with an inlet pipe 404. The inlet pipe 404, together with the connecting pipe 403, delivers water liquid sequentially into the recovery tray 401. After the outlet pipe 402 is closed, a central pipe 405 is installed at the center end of the recovery tray 401. The central pipe 405 opens the pipeline, allowing the water liquid to circulate in the four recovery trays 401.

[0023] In summary, this improved liquid-to-solid caustic soda drying tower is first based on... Figures 1-3The structure shown illustrates that the wet material delivery pipe 11 transports the liquid alkali solution containing stabilizer to the drying chamber 8. Under the action of the sprayer 10, the alkali solution is sprayed into the drying chamber 8. High-temperature hot air (300-400℃) comes into counter-current contact with the droplets, causing the water to evaporate and form powdered alkali. The product is then collected by the cyclone separator 1. During processing, the liquid inlet pipe 404, in conjunction with the connecting pipe 403, sequentially sends the liquid water to the inside of the recovery tray 401. The flowing liquid water inside the recovery tray 401 absorbs the residual heat in the exhaust gas flow during drying. The heat recovered can be used in other steps of solid caustic soda drying, saving energy. After the liquid outlet pipe 402 is closed, the central pipe 405 opens the pipeline so that the water liquid circulates in the four recovery discs 401. At the same time, the evenly distributed round holes on the surface of the recovery discs 401 are used for the flow of exhaust gas. The filter membranes 601 and the activated carbon 602, which are arranged in pairs, are inserted into the inside of the recovery discs 401 to filter the exhaust gas. They can also increase the contact time between the exhaust gas and the recovery discs 401 and improve the heat recovery effect.

[0024] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An improved liquid-to-solid caustic soda drying tower, comprising a cyclone separator (1) and a recovery assembly (4), characterized in that, The upper end of the cyclone separator (1) is connected to an air supply pipe (2), and the upper end of the air supply pipe (2) is connected to an exhaust gas treatment box (3). The recovery component (4) for recovering heat energy is set inside the exhaust gas treatment box (3). The recovery component (4) includes a recovery plate (401), an outlet pipe (402), a connecting pipe (403), an inlet pipe (404), and a central pipe (405). The outlet pipe (402) is installed on the right side of the upper end of the recovery plate (401), and the connecting pipe (403) is installed on the inner side of the side of the recovery plate (401). The inlet pipe (404) is installed on the right side of the lower end of the recovery plate (401), and the central pipe (405) is installed at the center end of the recovery plate (401).

2. The improved liquid-to-solid caustic soda drying tower according to claim 1, characterized in that, The number of the recycling trays (401) is set to four, and the recycling trays (401) and the connecting pipes (403) are distributed alternately on the left and right.

3. The improved liquid-to-solid caustic soda drying tower according to claim 1, characterized in that, The exhaust gas treatment box (3) is equipped with an exhaust pipe (5) on its top, and a filter assembly (6) for exhaust gas filtration is provided on the inner side of the recovery tray (401).

4. An improved liquid-to-solid caustic soda drying tower according to claim 3, characterized in that, The filter assembly (6) includes a filter membrane (601) and activated carbon (602), and the activated carbon (602) is disposed below the filter membrane (601).

5. An improved liquid-to-solid caustic soda drying tower according to claim 1, characterized in that, The recovery disc (401) and the filter membrane (601) are distributed alternately, and the recovery disc (401) and the activated carbon filter (602) are distributed alternately.

6. An improved liquid-to-solid caustic soda drying tower according to claim 1, characterized in that, The cyclone separator (1) is connected to a feeding pipe (7) on its side, and a drying box (8) is connected to the upper end of the feeding pipe (7).

7. An improved liquid-to-solid caustic soda drying tower according to claim 6, characterized in that, A hot air inlet pipe (9) is installed on the rear side of the drying box (8), and a sprayer (10) is installed on the top of the drying box (8).

8. An improved liquid-to-solid caustic soda drying tower according to claim 7, characterized in that, The top of the sprayer (10) is connected to a wet material delivery pipe (11), and the end of the wet material delivery pipe (11) is connected to a wet material tank (12).

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