Device for preventing sodium-based desulfurizing agent from hardening and using method

Abstract

The invention relates to the technical field of sodium-based desulfurizers, in particular to a device for preventing sodium-based desulfurizers from hardening and a using method.The device comprises a hopper, a sealed feeding opening is formed in the top of the hopper, a discharging pipeline is installed at the bottom of the hopper, a third valve body is installed on the discharging pipeline, and an air inlet pipeline is installed on the left side of the hopper; a dryer and a first valve body are sequentially installed on the air inlet pipeline from left to right, an air outlet pipeline is installed on the right side of the hopper, a second valve body is installed on the air outlet pipeline, and the air outlet end of the air outlet pipeline is connected with a vacuum pump. The device for preventing the sodium-based desulfurizing agent from hardening and the using method have the beneficial effects that the hopper is sealed, and then the interior of the hopper is sucked through the vacuum pump, so that air in the hopper is reduced, air in contact with the sodium-based desulfurizing agent is reduced, the phenomenon that the sodium-based desulfurizing agent is hardened due to water absorption is reduced, and the service life of the sodium-based desulfurizing agent is prolonged. The overall using effect is good, and practicability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of sodium-based desulfurizing agents, and particularly relates to a device for preventing sodium-based desulfurizing agents from caking and a using method thereof. Background Art

[0002] Sodium-based desulfurization is an important desulfurization process for flue gas. The desulfurizing agent used is baking soda. After baking soda is ground and sieved, the part that meets the particle size requirements is pneumatically conveyed and sprayed into the flue gas containing sulfur dioxide through a nozzle. After baking soda is heated, it decomposes to produce sodium carbonate. Sodium carbonate reacts with sulfur dioxide in the flue gas to produce sodium sulfite. Sodium sulfite is further oxidized and finally forms stable sodium sulfate, thereby achieving the effect of reducing sulfur dioxide in the flue gas.

[0003] The main component of the currently used sodium-based desulfurizing agent is baking soda (sodium bicarbonate), and the content of sodium bicarbonate exceeds 95%. Baking soda has obvious water absorption. When baking soda is exposed to the air, it is extremely easy to absorb water and cake, which easily causes blockage of the desulfurization system equipment and affects the operation stability of the equipment. After baking soda is ground, the surface area increases, the water absorption is even stronger, and it is easy to adhere to the inner wall of the conveying pipeline. After long-term operation, the pipe diameter becomes smaller or even blocked, resulting in an increase in conveying pressure and energy consumption. At the same time, the inside of the pipeline is a closed space, and it is difficult to clean, resulting in long-term shutdown and seriously affecting production efficiency.

[0004] Aiming at the problem that the sodium-based desulfurizing agent is prone to absorb moisture in the air and caking during use, there is an urgent need for a device for preventing sodium-based desulfurizing agents from caking and a using method thereof. Summary of the Invention

[0005] Aiming at the problem that the currently used sodium-based desulfurizing agent is prone to absorb moisture in the air and caking during use, the present invention proposes a device for preventing sodium-based desulfurizing agents from caking and a using method thereof, which reduces the moisture in the air and avoids the phenomenon of the sodium-based desulfurizing agent absorbing water and caking.

[0006] To achieve the above object, on the one hand, the present invention proposes a device for preventing sodium-based desulfurizing agents from caking, including a hopper. A sealed feed port is installed at the top of the hopper, a discharge pipe is installed at the bottom of the hopper, a valve body three is installed on the discharge pipe, an intake pipe is installed on the left side of the hopper, a dryer and a valve body one are sequentially installed on the intake pipe from left to right, an outlet pipe is installed on the right side of the hopper, a valve body two is installed on the outlet pipe, and the end of the outlet pipe where the gas exits is connected to a vacuum pump.

[0007] Further, the valve body one, the valve body two and the valve body three are all ball valves.

[0008] Further, the outlet pipe and the vacuum pump are connected by a quick-release joint, and through the quick-release joint, it is convenient to disassemble the outlet pipe and the vacuum pump.

[0009] Further, an air filter is installed at the air intake end of the intake pipe. Through the air filter, impurities in the air can be filtered out.

[0010] Further, the dryer uses a medium-replaceable dryer. Through the medium-replaceable dryer, the drying medium can be replaced when the drying effect of the drying medium is not good, ensuring the use effect of the dryer.

[0011] On the other hand, the present invention also proposes a method for using a device for preventing sodium-based desulfurizer caking, including the above-mentioned device for preventing sodium-based desulfurizer caking, and further including the following steps: Step 1, when feeding, first open the sealed feed port, then add materials and close the sealed feed port; Step 2, close valve body 1, valve body 2 and valve body 3 in sequence; Step 3, turn on the vacuum pump. When the pressure in the hopper is negative, close valve body 2 and then turn off the vacuum pump. At this time, the air content in the hopper decreases, thereby reducing the caking property of the sodium-based desulfurizer.

[0012] Further, during production operation, open valve body 1, close valve body 2, close the sealed feed port, and open valve body 3. At this time, the air entering the hopper will be dried by the dryer, reducing the caking property of the sodium-based desulfurizer.

[0013] Further, during system maintenance or shutdown of production, close the sealed feed port, close valve body 1, valve body 2 and valve body 3. In this way, no new air will enter the hopper, ensuring the dryness of the air inside the hopper, enabling the sodium-based desulfurizer inside the hopper to be stored for a long time, and maintaining the reliability of production after restarting production.

[0014] The beneficial effects of the present invention are: By sealing the hopper and then sucking the inside of the hopper through a vacuum pump, the air inside the hopper is reduced, the air in contact with the sodium-based desulfurizer is reduced, and thus the phenomenon of caking of the sodium-based desulfurizer due to water absorption is reduced. The overall use effect is good and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a schematic structural diagram of the present invention.

[0017] In the figure: 1. Hopper; 2. Sealed feed inlet; 3. Intake pipeline; 4. Dryer; 5. Valve body I; 6. Exhaust pipeline; 7. Valve body II; 8. Discharge pipeline; 9. Valve body III. Specific implementation mode

[0018] To make the objectives, features, and advantages of the present invention more obvious and understandable, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the specific embodiments of the present invention. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.

[0019] Embodiment 1 As Figure 1 shown, in this embodiment, a device for preventing the caking of sodium-based desulfurizer proposed by the present invention includes a hopper 1. A sealed feed inlet 2 is installed at the top of the hopper 1. A discharge pipeline 8 is installed at the bottom of the hopper 1. A valve body III 9 is installed on the discharge pipeline 8. An intake pipeline 3 is installed on the left side of the hopper 1. A dryer 4 and a valve body I 5 are successively installed on the intake pipeline 3 from left to right. An air filter is installed at the intake end of the intake pipeline 3. Through the air filter, impurities in the air can be filtered. The dryer 4 adopts a medium-replaceable dryer. Through the medium-replaceable dryer, the drying medium can be replaced when the drying effect of the drying medium is not good, ensuring the use effect of the dryer. An exhaust pipeline 6 is installed on the right side of the hopper 1. A valve body II 7 is installed on the exhaust pipeline 6. The valve body I 5, the valve body II 7, and the valve body III 9 all adopt ball valves. The exhaust end of the exhaust pipeline 6 is connected to a vacuum pump. A quick-release joint is used to connect the exhaust pipeline 6 and the vacuum pump. Through the quick-release joint, it is convenient to disassemble the exhaust pipeline 6 and the vacuum pump.

[0020] Embodiment 2 In this embodiment, a method for using a device for preventing the caking of sodium-based desulfurizer is proposed in Embodiment 2, including the device for preventing the caking of sodium-based desulfurizer in Embodiment 1, and further including the following steps: Step 1, when feeding, first open the sealed feed inlet 2, and then close the sealed feed inlet 2 after adding the material; Step 2, successively close the valve body I 5, the valve body II 7, and the valve body III 9; Step 3, turn on the vacuum pump. When the pressure in the hopper 1 is negative, close the valve body II 7 and then turn off the vacuum pump. At this time, the air content in the hopper 1 decreases, thereby reducing the caking property of the sodium-based desulfurizer; During production operation, open the valve body I 5, close the valve body II 7, close the sealed feed inlet 2, and open the valve body III 9. At this time, the air entering the hopper 1 will be dried by the dryer 4, reducing the caking property of the sodium-based desulfurizer. During system maintenance or shutdown of production, close the sealed feed port 2, and close valve body one 5, valve body two 7, and valve body three 9. In this way, no new air will enter the hopper 1, ensuring the dryness of the air inside the hopper 1, enabling the long-term storage of the sodium-based desulfurizer inside the hopper 1, and maintaining the reliability of production after restarting production.

[0021] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for preventing caking of sodium-based desulfurizer, comprising a hopper (1), characterized in that, A sealed feed inlet (2) is installed at the top of the hopper (1), a discharge pipeline (8) is installed at the bottom of the hopper (1), a valve body three (9) is installed on the discharge pipeline (8), an intake pipeline (3) is installed on the left side of the hopper (1), a dryer (4) and a valve body one (5) are sequentially installed on the intake pipeline (3) from left to right, an exhaust pipeline (6) is installed on the right side of the hopper (1), a valve body two (7) is installed on the exhaust pipeline (6), and one end of the exhaust pipeline (6) where the air exits is connected to a vacuum pump.

2. The device for preventing the caking of sodium-based desulfurizer according to claim 1, wherein The valve body one (5), the valve body two (7) and the valve body three (9) all adopt ball valves.

3. The device for preventing the caking of sodium-based desulfurizer according to claim 1, characterized in that, A quick-release joint is used for connecting between the exhaust pipeline (6) and the vacuum pump.

4. The device for preventing the sodium-based desulfurizer from caking according to claim 1, characterized in that, An air filter is installed at one end of the intake pipeline (3) where the air enters.

5. The device for preventing sodium-based desulfurizer caking according to claim 1, characterized in that, The dryer (4) adopts a dryer with replaceable medium.

6. A method for using a device for preventing sodium-based desulfurizer caking, comprising the device for preventing sodium-based desulfurizer caking according to any one of claims 1-5, characterized in that, It also includes the following steps: Step 1, when feeding materials, first open the sealed feed inlet (2), and then close the sealed feed inlet (2) after adding the materials; Step 2, sequentially close the valve body one (5), the valve body two (7) and the valve body three (9); Step 3, turn on the vacuum pump, when the pressure in the hopper (1) is negative pressure, close the valve body two (7) and then turn off the vacuum pump.

7. The usage method of the device for preventing the caking of sodium-based desulfurizer according to claim 6, characterized in that During production operation, open the valve body one (5), close the valve body two (7), close the sealed feed inlet (2), and open the valve body three (9).

8. The usage method of the device for preventing sodium-based desulfurizer caking according to claim 6, characterized in that, During system maintenance or shutdown for production, close the sealed feed inlet (2), and close the valve body one (5), the valve body two (7) and the valve body three (9).

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