Dust raising prevention device for feeding of sodium-based desulfurization powder bin

Abstract

The invention discloses a sodium-based desulfurization powder bin feeding dust raising prevention device which comprises powder bins, a movable safety support, a discharging sealing channel and a negative pressure dust removal device, the movable safety support is movably arranged between the two powder bins, the discharging sealing channel is arranged in the middle of the movable safety support, and the negative pressure dust removal device is arranged on one side of the powder bins. Wherein the blanking sealing channel comprises a blanking barrel, an arc-shaped door, a flexible connecting pipe and a connecting piece, the arc-shaped door is arranged in the middle of the blanking barrel, and the flexible connecting pipe is arranged at the bottom of the blanking barrel through the connecting piece; the negative-pressure dust removal device comprises a negative-pressure dust removal branch pipe assembly and a negative-pressure dust removal main pipe assembly, the negative-pressure dust removal branch pipe assembly is connected with one side of the powder bin, and the negative-pressure dust removal main pipe assembly is arranged between the negative-pressure dust removal branch pipe assembly and the flue and used for discharging dust into the flue. Zero dust raising and zero pollution in the baking soda feeding process are achieved, agent waste in the feeding process is completely eradicated, life health of workers in desulfurization production is guaranteed, and the labor intensity of the workers is also reduced.

Description

Technical Field

[0001] This invention belongs to the field of dust removal technology, and in particular relates to a dust prevention device for feeding sodium-based desulfurization powder silos. Background Technology

[0002] The flue gas desulfurization (FGD) facility for the 70MW generator unit boiler in the new power plant area adopts SDS sodium-based dry desulfurization technology. This technology is a very mature process in the field of flue gas desulfurization, mainly including a mill system, reactor system, dust removal system, and pneumatic ash conveying system. In the existing technology, when adding baking soda to the powder silo in the mill system, an electric hoist is used to lift it directly to the top of the silo, and the silo cover is opened to discharge the material directly. This results in a large amount of dust being generated at the operating site, and a large amount of baking soda powder is spread in the air. At the same time, the discharge process increases the risk of occupational diseases for workers. After the discharge is completed, manual cleaning of the site is required, which increases labor waste. Summary of the Invention

[0003] To at least partially solve the technical problems existing in the prior art, the present invention provides a sodium-based desulfurization powder silo feeding and dust prevention device.

[0004] The sodium-based desulfurization powder silo feeding and dust prevention device of the present invention includes a powder silo, a movable safety support, a discharge sealing channel, and a negative pressure dust removal device. The movable safety support is movably installed between two powder silos. The discharge sealing channel is located in the middle of the movable support and is used for feeding the powder silos. The negative pressure dust removal device is located on one side of the powder silo and is used for dust removal from the powder silo. The material feeding sealing channel includes a material feeding cylinder, an arc-shaped door, a flexible tube, and a connector. The arc-shaped door is located in the middle of the material feeding cylinder, and the flexible tube is located at the bottom of the material feeding cylinder through the connector. The negative pressure dust removal device includes a negative pressure dust removal branch pipe assembly and a negative pressure dust removal main pipe assembly. The negative pressure dust removal branch pipe assembly is connected to one side of the powder silo, and the negative pressure dust removal main pipe assembly is disposed between the negative pressure dust removal branch pipe assembly and the flue, for discharging dust into the flue.

[0005] Furthermore, in the above-mentioned sodium-based desulfurization powder silo feeding and dust prevention device, the mobile safety device includes a support body and casters. The casters are installed at the bottom of the support body, and a circular discharge port is opened at the middle of the upper end of the support body. The discharge port is matched with the discharge cylinder, and the discharge cylinder is fixed in the discharge port by bolts.

[0006] Furthermore, in the above-mentioned sodium-based desulfurization powder silo feeding dust prevention device, the negative pressure dust removal branch pipe assembly includes a negative pressure dust removal branch pipe, a negative pressure dust removal branch pipe valve, and a filter bag. The negative pressure dust removal branch pipe valve is located at the end of the negative pressure dust removal branch pipe and is used to control the negative pressure switch. The filter bag is provided at the end of the negative pressure dust removal branch pipe valve that is connected to the powder silo.

[0007] Furthermore, in the above-mentioned sodium-based desulfurization powder silo feeding dust prevention device, the negative pressure dust removal main pipe assembly includes a negative pressure dust removal main pipe and a negative pressure dust removal main valve. One end of the negative pressure dust removal main pipe is connected to the negative pressure dust removal branch pipe, and the negative pressure dust removal main valve is located at the other end of the negative pressure dust removal main pipe and connected to the flue.

[0008] Furthermore, in the above-mentioned sodium-based desulfurization powder silo feeding and dust prevention device, an installation frame is provided in the middle of the feeding cylinder, the installation frame is covered with a sealing strip, and the arc-shaped door is installed on the installation frame.

[0009] Furthermore, in the aforementioned sodium-based desulfurization powder silo feeding and dust prevention device, a counterweight coil is installed at the bottom of the flexible connecting pipe.

[0010] Furthermore, in the above-mentioned sodium-based desulfurization powder silo feeding and dust prevention device, a discharge hole is provided on the top of the powder silo, and the diameter of the discharge hole is equal to the diameter of the discharge cylinder.

[0011] The sodium-based desulfurization powder silo feeding and dust prevention device of the present invention has the following advantages and beneficial effects: This invention effectively solves the technical problem of generating a large amount of dust in the baking soda powder silo feeding method. It achieves feeding safety through a mobile safety support, and achieves zero dust and zero pollution in the baking soda feeding process through the setting of a sealed feeding channel and a negative pressure dust removal device. It eliminates the waste of reagents in the feeding process, protects the life and health of employees in desulfurization production, and greatly reduces the labor intensity of employees. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a front view of the sodium-based desulfurization powder silo feeding and dust prevention device of the present invention; Figure 2 This is a top view of the sodium-based desulfurization powder silo feeding and dust prevention device of the present invention.

[0013] Explanation of reference numerals in the attached figures: 100: Flue; 1: Powder hopper, 11 discharge holes; 2: Mobile safety support; 21: Support body; 22: Casters; 23: Discharge port; 3: Material unloading sealing channel; 31: Material unloading cylinder; 32: Mounting frame; 33: Sealing strip; 34: Arc-shaped door; 35: Flexible connecting pipe; 36: Connector; 37: Counterweight coil; 4: Negative pressure dust removal device; 41: Negative pressure dust removal branch pipe assembly; 411: Negative pressure dust removal branch pipe; 412: Negative pressure dust removal branch pipe valve; 413: Filter bag; 42: Negative pressure dust removal main pipe assembly; 421: Negative pressure dust removal main pipe; 422: Negative pressure dust removal main valve. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0015] like Figures 1 to 2 As shown, the sodium-based desulfurization powder silo feeding and dust prevention device of the present invention includes a powder silo 1, a movable safety support 2, a discharge sealing channel 3, and a negative pressure dust removal device 4. The movable safety support 2 is movably installed between two powder silos 1. The discharge sealing channel 3 is located in the middle of the movable installation support and is used for feeding the powder silos 1. The negative pressure dust removal device 4 is located on one side of the powder silo 1 and is used for dust removal from the powder silo 1. The material discharge sealing channel 3 includes a material discharge cylinder 31, an arc-shaped door 34, a flexible tube 35, and a connector 36. The arc-shaped door 34 is located in the middle of the material discharge cylinder 31, and the flexible tube 35 is located at the bottom of the material discharge cylinder 31 through the connector 36. The negative pressure dust removal device 4 includes a negative pressure dust removal branch pipe assembly 41 and a negative pressure dust removal main pipe assembly 42. The negative pressure dust removal branch pipe assembly 41 is connected to one side of the powder silo 1. The negative pressure dust removal main pipe assembly 42 is located between the negative pressure dust removal branch pipe assembly 41 and the flue 100, and is used to discharge dust into the flue 100. The flue 100 is the desulfurization U-shaped reaction flue 100 in the flue gas desulfurization facility of the generator boiler. During the boiler operation, negative pressure can be generated, so the negative pressure in the desulfurization U-shaped reaction flue 100 is introduced into the powder silo 1 through the negative pressure dust removal device 4, so that negative pressure is formed inside the powder silo 1, ensuring that no dust is generated during the feeding process.

[0016] Furthermore, in the above-mentioned sodium-based desulfurization powder silo feeding and dust prevention device, the mobile safety device includes a support body 21 and casters 22. The casters 22 are installed at the bottom of the support body 21. A circular discharge port 23 is opened at the middle of the upper end of the support body 21. The discharge port 23 is matched with the discharge cylinder 31. The discharge cylinder 31 is fixed in the discharge port 23 by bolts.

[0017] Furthermore, in the sodium-based desulfurization powder silo feeding dust prevention device of the present invention, the negative pressure dust removal branch pipe assembly 41 includes a negative pressure dust removal branch pipe 411, a negative pressure dust removal branch pipe valve 412, and a filter bag 413. The negative pressure dust removal branch pipe valve 412 is located at the end of the negative pressure dust removal branch pipe 411 and is used to control the negative pressure switch. The end of the negative pressure dust removal branch pipe valve 412 connected to the powder silo 1 is provided with a filter bag 413. The negative pressure in the powder silo 1 is adjusted or closed by the setting of the negative pressure dust removal branch pipe valve 412. The setting of the filter bag 413 effectively prevents sodium bicarbonate from directly entering the flue 100.

[0018] Furthermore, in the sodium-based desulfurization powder silo feeding dust prevention device of the present invention, the negative pressure dust removal main pipe assembly 42 includes a negative pressure dust removal main pipe 421 and a negative pressure dust removal main valve 422. One end of the negative pressure dust removal main pipe 421 is connected to the negative pressure dust removal branch pipe 411, and the negative pressure dust removal main valve 422 is provided at the other end of the negative pressure dust removal main pipe 421 and connected to the flue 100.

[0019] Furthermore, in the sodium-based desulfurization powder silo feeding dust prevention device of the present invention, an installation frame 32 is provided in the middle of the feeding cylinder 31, and a sealing strip 33 is wrapped on the installation frame 32. An arc-shaped door 34 is installed on the installation frame 32. The arc-shaped door 34 is used to safely open the bottom discharge port of the sodium bicarbonate ton bag. The edge of the arc-shaped door 34 is sealed with a sealing strip 33 to prevent material leakage and dust.

[0020] Furthermore, in the sodium-based desulfurization powder silo feeding and dust prevention device of the present invention, a counterweight coil 37 is provided at the bottom of the flexible pipe 35 to increase the verticality of the bottom of the flexible pipe 35, making it easier to enter the powder silo 1 and ensuring that the sodium bicarbonate feeding channel is unobstructed.

[0021] Furthermore, in the sodium-based desulfurization powder silo feeding and dust prevention device of the present invention, a discharge hole 11 is provided at the top of the powder silo 1, and the diameter of the discharge hole 11 is equal to the diameter of the discharge cylinder 31.

[0022] Specifically, the mobile safety support 2 is moved directly above the powder hopper 1 that needs to be fed, so that the discharge cylinder 31 corresponds to the discharge hole 11 and its position is accurate. Then, the flexible connecting pipe 35 is vertically inserted into the discharge hole 11 of the powder hopper 1 to facilitate the feeding operation and ensure the safety and sealing of the feeding process. At this time, the baking soda ton bag is hoisted onto the mobile safety support 2 with the opening of the baking soda ton bag directly above the discharge cylinder 31 to ensure the smoothness and safety of the unloading process. Then, open the main negative pressure dust removal valve 422 and the branch negative pressure dust removal valve 412, allowing the negative pressure inside the flue 100 to enter the powder silo 1 through the main negative pressure dust removal pipe 421 and the branch negative pressure dust removal pipe 411, so that dust removal can be performed. At this time, open the arc-shaped door 34 and manually untie the rope of the baking soda discharge port to facilitate the discharge operation. After the discharge operation is completed, close the arc-shaped door 34 to ensure the safety and sealing of the feeding process. The baking soda enters the powder silo 1 through the discharge cylinder 31 and the flexible pipe 35. The dust removal effect is controlled by adjusting the opening degree of the branch negative pressure dust removal valve 412 to ensure that the dust removal effect reaches the optimal state. During normal boiler operation, the negative pressure here should be maintained between 4.5-5.5 kPa to ensure that the negative pressure suction can fully meet the on-site dust removal requirements. Through the above steps, the safety, efficiency and cleanliness of the feeding process can be ensured.

[0023] In summary, compared with the prior art, the sodium-based desulfurization powder silo feeding dust prevention device of the present invention has the following advantages and beneficial effects: The present invention effectively solves the technical problem of generating a large amount of dust in the sodium bicarbonate powder silo feeding method, achieves feeding safety through a mobile safety support, and achieves zero dust and zero pollution in the sodium bicarbonate feeding process through the setting of a material discharge sealing channel and a negative pressure dust removal device, eliminating the waste of reagents in the feeding process, protecting the life and health of employees in desulfurization production, and greatly reducing the labor intensity of employees.

[0024] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dust prevention device for feeding sodium-based desulfurization powder silos, characterized in that, The sodium-based desulfurization powder silo feeding and dust prevention device includes a powder silo, a movable safety support, a discharge sealing channel, and a negative pressure dust removal device. The movable safety support is movably installed between two powder silos. The discharge sealing channel is located in the middle of the movable support and is used for feeding the powder silos. The negative pressure dust removal device is located on one side of the powder silo and is used for dust removal from the powder silo. The material feeding sealing channel includes a material feeding cylinder, an arc-shaped door, a flexible tube, and a connector. The arc-shaped door is located in the middle of the material feeding cylinder, and the flexible tube is located at the bottom of the material feeding cylinder through the connector. The negative pressure dust removal device includes a negative pressure dust removal branch pipe assembly and a negative pressure dust removal main pipe assembly. The negative pressure dust removal branch pipe assembly is connected to one side of the powder silo, and the negative pressure dust removal main pipe assembly is disposed between the negative pressure dust removal branch pipe assembly and the flue, for discharging dust into the flue.

2. The sodium-based desulfurization powder silo feeding and dust prevention device according to claim 1, characterized in that, The mobile safety device includes a support body and casters. The casters are installed at the bottom of the support body. A circular discharge port is opened at the middle of the upper end of the support body. The discharge port matches the discharge cylinder. The discharge cylinder is fixed inside the discharge port by bolts.

3. The sodium-based desulfurization powder silo feeding and dust prevention device according to claim 1, characterized in that, The negative pressure dust removal branch pipe assembly includes a negative pressure dust removal branch pipe, a negative pressure dust removal branch pipe valve, and a filter bag. The negative pressure dust removal branch pipe valve is located at the end of the negative pressure dust removal branch pipe and is used to control the negative pressure switch. The filter bag is located at the end of the negative pressure dust removal branch pipe valve that is connected to the powder silo.

4. The sodium-based desulfurization powder silo feeding and dust prevention device according to claim 3, characterized in that, The negative pressure dust removal main pipe assembly includes a negative pressure dust removal main pipe and a negative pressure dust removal main valve. One end of the negative pressure dust removal main pipe is connected to the negative pressure dust removal branch pipe, and the negative pressure dust removal main valve is located at the other end of the negative pressure dust removal main pipe and is connected to the flue.

5. The sodium-based desulfurization powder silo feeding and dust prevention device according to claim 1, characterized in that, An installation frame is provided in the middle of the feeding cylinder, and a sealing strip is wrapped on the installation frame. The arc-shaped door is installed on the installation frame.

6. The sodium-based desulfurization powder silo feeding and dust prevention device according to claim 1, characterized in that, A counterweight coil is provided at the bottom of the flexible connector.

7. The sodium-based desulfurization powder silo feeding and dust prevention device according to claim 1, characterized in that, The powder hopper has a discharge hole at the top, and the diameter of the discharge hole is equal to the diameter of the discharge cylinder.

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