Slurry preparation and supply device of desulfurizing tower

Abstract

The utility model discloses a slurry preparation and supply device of a desulfurizing tower, the slurry preparation and supply device comprises a material supply unit, a supply unit and a preparation tank, the material supply unit is used for providing limestone into the preparation tank, and the preparation tank is used for containing slurry; a circulating filtration mechanism is arranged in the preparation tank, a containing cavity is formed between the preparation tank and the circulating filtration mechanism, and the circulating filtration mechanism mixes slurry and limestone in the preparation tank and circularly filters the slurry; the supply unit is arranged between the circulating filtration mechanism and the desulfurization tower and is used for conveying the slurry in the circulating filtration mechanism to the desulfurization tower to adjust the pH value of the slurry in the desulfurization tower; the filtering cover is internally provided with a drainage assembly for conveying slurry from the containing cavity into the mixing cavity, and the slurry flows back into the containing cavity through filtering holes in the side wall of the filtering cover for reciprocating circulation, so that it is guaranteed that limestone and the slurry can be fully mixed, the phenomenon that limestone blocks block a spraying mechanism in the desulfurizing tower is avoided, and therefore it is guaranteed that the desulfurizing tower can work stably.

Description

Technical Field

[0001] The present application relates to the technical field of desulfurization towers, and in particular to a slurry preparation and liquid supply device for a desulfurization tower. Background Art

[0002] The internal-circulation gypsum wet desulfurization process uses limestone as a desulfurizer. After crushing and grinding the slurry into a fine powder, it is stirred and mixed with water to form a slurry. This slurry is then transported to the desulfurization tower, where it reacts chemically with sulfur dioxide in the flue gas. Throughout this process, the desulfurized slurry is recycled within the absorption tower, forming an internal circulation system. However, limestone lumps are prone to forming in the stirred and mixed slurry. These lumps can clog the spray mechanism when transported to the desulfurization tower. Utility Model Content

[0003] The present application provides a slurry preparation and liquid supply device for a desulfurization tower to solve the problem that limestone blocks exist in the existing slurry and easily clog the spray mechanism. The following technical solutions are adopted:

[0004] The slurry preparation and liquid supply device of the desulfurization tower includes a feeding unit and a preparation tank, wherein the feeding unit is used to provide limestone into the preparation tank, and the preparation tank is used to contain slurry;

[0005] A circulation filtering mechanism is provided in the preparation tank, and a receiving cavity is formed between the preparation tank and the circulation filtering mechanism. The circulation filtering mechanism mixes the slurry with limestone in the preparation tank and circulates and filters the slurry;

[0006] A supply unit is provided between the circulation filtering mechanism and the desulfurization tower, and is used for transporting the slurry in the circulation filtering mechanism to the desulfurization tower.

[0007] Preferably, the circulating filtration includes a filter cover, a mixing chamber is provided in the filter cover, and a drainage component is provided in the mixing chamber for driving the slurry to circulate in the containing chamber and the mixing chamber.

[0008] Preferably, a plurality of filter holes are distributed on the side wall of the filter cover, the top of the filter cover is connected to the preparation tank, and the bottom is provided with an opening connected to the accommodating cavity.

[0009] Preferably, a filter net is provided on the outside of the filter cover.

[0010] Preferably, the drainage assembly includes a driving motor and a rotating shaft, and a scraper provided on the outside of the rotating shaft, and the driving motor drives the rotating shaft to drive the scraper to rotate.

[0011] Preferably, the outer edge of the scraper is in contact with the side wall of the mixing chamber.

[0012] Preferably, it also includes a detection component, which is arranged in the desulfurization tower and is used to detect the pH value of the raw slurry in the desulfurization tower.

[0013] Preferably, the device further includes a control device electrically connected to the supply unit, the material feeding unit, the circulation and filtration mechanism, and the detection component. The control device can detect the pH value of the slurry in the desulfurization tower based on the detection component, and open the supply unit to supply slurry to the desulfurization tower or close the supply unit to supply slurry to the desulfurization tower, so that the pH value of the slurry in the desulfurization tower is within a normal range to ensure the desulfurization effect of the desulfurization tower.

[0014] The beneficial effects of this application are:

[0015] (1) A drainage component is provided in the filter cover to transport the slurry from the holding chamber to the mixing chamber, and the limestone blocks are filtered through the filter holes on the side wall of the filter cover. The slurry flows back to the holding chamber for circulation and mixing, ensuring that the limestone and slurry can be fully mixed. The limestone blocks are retained in the mixing chamber to avoid the limestone blocks clogging the spray mechanism in the desulfurization tower, thereby ensuring that the desulfurization tower can work stably.

[0016] (2) The drainage assembly scrapes off the limestone blocks at the filter holes by rotating the scraper. At the same time, the limestone blocks are squeezed and crushed between the scraper and the inner wall of the filter cover, so that the limestone blocks are mixed with the slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of this application;

[0018] Figure 2 This is a schematic diagram of the structure of the circulating filtration mechanism of this application;

[0019] Figure 3 It is a schematic diagram of the drainage component structure of this application;

[0020] Figure 4 It is a schematic diagram of the slurry circulation flow of the present application;

[0021] Figure 5 This is a cross-sectional view taken along line AA of this application.

[0022] In the picture:

[0023] 1. Feeding unit, 11. Storage bin, 12. Screw conveying mechanism;

[0024] 2. Preparation tank, 21. Circulation filtration mechanism, 22. Accommodation chamber, 23. Mixing chamber; 211. Filter cover, 212. Scraper, 213. Drive motor, 2111. Filter hole;

[0025] 3. Supply unit;

[0026] 4. Desulfurization tower. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described in this application are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0028] Conclusion Figures 1 to 5 , further explain this application:

[0029] Combine Figure 1 The slurry preparation and liquid supply device of the desulfurization tower includes a feeding unit 1 and a preparation tank 2. The feeding unit 1 is used to provide limestone into the preparation tank 2. The preparation tank 2 is used to contain slurry and has a water injection port on its side. The feeding unit 1 includes a storage bin 11 and a screw conveying mechanism 12. The limestone in the storage bin 11 is transported to the preparation tank 2 through the screw conveying mechanism 12.

[0030] The preparation tank 2 is provided with a circulation filtering mechanism 21, and a receiving chamber 22 is formed between the preparation tank 2 and the circulation filtering mechanism 21. The limestone entering the preparation tank 2 will enter the receiving chamber 22; the circulation filtering mechanism 21 mixes the slurry and the limestone in the preparation tank 2 and can also circulate and filter the slurry.

[0031] The supply unit 3 is provided between the circulation filtering mechanism 21 and the desulfurization tower 4 and is used to transport the slurry in the circulation filtering mechanism 21 to the desulfurization tower 4. In this embodiment, the supply unit 3 is a pump.

[0032] Combine Figure 3 and Figure 4 The circulating filtration includes a filter cover 211, a mixing chamber 23 is provided in the filter cover 211, and a drainage component is provided in the mixing chamber 23 for driving the slurry to circulate in the accommodating chamber 22 and the mixing chamber 23, thereby mixing the slurry with the limestone. The bottom of the filter cover 211 is provided with an opening connected to the accommodating chamber 22; the drainage component can transport the slurry and limestone in the accommodating chamber 22 from the opening to the mixing chamber 23 for stirring and mixing.

[0033] The sidewall of the filter cover 211 is provided with a plurality of filter holes 2111. The slurry in the mixing chamber 23 flows back to the container through the filter holes 2111, and is filtered, thereby blocking the limestone in the slurry within the mixing chamber 23. The limestone is also continuously washed, collided, and mixed with the slurry within the mixing chamber 23 during the flow process, thereby preventing the limestone from clogging the spray mechanism of the desulfurization tower. The top of the filter cover 211 is connected to the preparation tank 2.

[0034] In some embodiments, a filter screen is further included, and the filter screen is arranged on the filter cover 211; in this embodiment, the outside of the filter cover 211 is wrapped with a filter screen; the filter screen can also be arranged on the side wall of the mixing chamber 23, and the filter screen can further filter the slurry and retain the limestone blocks in the slurry in the mixing chamber, ensuring that the limestone slurry supplied to the desulfurization tower will not contain limestone blocks, thereby avoiding clogging of the desulfurization tower spray mechanism.

[0035] The drainage assembly includes a drive motor 213 and a rotating shaft, and a scraper 212 tilted and arranged outside the rotating shaft. The drive motor 213 drives the rotating shaft to rotate the scraper 212. When the drive motor 213 drives the scraper 212 to rotate, the scraper 212 can guide the slurry outside the mixing chamber 23 into the mixing chamber 23 for mixing. At the same time, the slurry in the mixing chamber 23 is squeezed into the accommodating chamber 22 through the filter holes 2111, circulating and mixing.

[0036] Combine Figure 5 The scraper 212 is curved from the inside out, and the outer edge of the scraper 212 is in contact with the side wall of the mixing chamber 23. When the scraper 212 rotates, the limestone blocks filtered at the filter holes 2111 can be scraped off, and the limestone blocks are squeezed and crushed by the scraper and the inner wall of the filter cover 211, and mixed with the slurry.

[0037] In some embodiments, the system further includes a detection assembly and a control device. The detection assembly is located within the desulfurization tower 4 and is used to detect the pH value of the raw slurry within the desulfurization tower 4. The control device is electrically connected to the supply unit 3, the feeding unit 1, the circulating filter mechanism 21, and the detection assembly. Based on the feedback signal from the detection assembly, the control device controls the supply unit 3 to supply limestone slurry into the desulfurization tower 4, automatically adding raw limestone slurry to the desulfurization tower 4 to adjust the pH value of the slurry within the desulfurization tower 4 to a normal range, thereby ensuring the desulfurization effect of the desulfurization tower 4.

Claims

1. The slurry preparation and liquid supply device of the desulfurization tower is characterized in that: It comprises a feeding unit and a preparation tank, wherein the feeding unit is used to provide limestone into the preparation tank, and the preparation tank is used to contain slurry; A circulation filtering mechanism is provided in the preparation tank, and a receiving cavity is formed between the preparation tank and the circulation filtering mechanism. The circulation filtering mechanism mixes the slurry with limestone in the preparation tank and circulates and filters the slurry; A supply unit is provided between the circulation filtering mechanism and the desulfurization tower, and is used for transporting the slurry in the circulation filtering mechanism to the desulfurization tower.

2. The slurry preparation and liquid supply device for a desulfurization tower according to claim 1, characterized in that: The circulating filter comprises a filter cover, a mixing chamber is provided in the filter cover, and a drainage component is provided in the mixing chamber for driving the slurry to circulate in the containing chamber and the mixing chamber.

3. The slurry preparation and liquid supply device for the desulfurization tower according to claim 2, characterized in that: A plurality of filter holes are distributed on the side wall of the filter cover, the top of the filter cover is connected to the preparation tank, and the bottom is provided with an opening connected to the accommodating cavity.

4. The slurry preparation and liquid supply device for a desulfurization tower according to claim 2, characterized in that: A filter net is arranged on the outside of the filter cover.

5. The slurry preparation and liquid supply device for a desulfurization tower according to claim 2, characterized in that: The drainage assembly includes a driving motor and a rotating shaft, and a scraper arranged obliquely on the outside of the rotating shaft. The driving motor drives the rotating shaft to drive the scraper to rotate.

6. The slurry preparation and liquid supply device for a desulfurization tower according to claim 5, characterized in that: The scraper is arc-shaped from inside to outside, and the outer edge of the scraper is in contact with the side wall of the mixing chamber.

7. The slurry preparation and liquid supply device for a desulfurization tower according to claim 1, characterized in that: It also includes a detection component, which is arranged in the desulfurization tower and is used to detect the pH value of the raw slurry in the desulfurization tower.

8. The slurry preparation and liquid supply device for a desulfurization tower according to claim 7, characterized in that: It also includes a control device, which is electrically connected to the supply unit, the material feeding unit, the circulation filtering mechanism and the detection component.

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