Device for purifying flue gas in flue
By using insulating materials in the flue wall contact area and the central area discharge port design, the problem of charge loss of the absorbent in the flue is solved, thus improving the flue gas purification effect.
Patent Information
- Application Number
- CN202423190136.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
In existing flue gas systems, absorbents are easily adsorbed onto the metal flue walls due to the attraction between opposite charges, resulting in reduced purification efficiency.
The flue wall contact section and central area discharge port are designed with insulating materials to ensure that the absorbent is fully diffused and comes into contact with the flue gas, preventing charge loss.
This improves the purification effect of the absorbent, ensures full contact between the absorbent and the flue gas, and enhances the purification efficiency.
Smart Images
Figure CN223602302U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of pollutant purification, more particularly to a device for purifying flue gas in a flue. BACKGROUND
[0002] With the rapid development of industry, flue gas emissions are increasing, and flue gas purification is particularly important.
[0003] The absorbent is a substance that can purify flue gas. When using the absorbent to purify flue gas, the absorbent first needs to be charged with an electric charge different from the ground by the electrostatic spray gun body of the electrostatic spray gun device, and then transported to the flue through the pipeline communicating with the flue. Since the absorbent is charged with the same charge, it repels each other and can quickly spread, so that the surface of each absorbent contacts the flue gas, and the flue gas purification efficiency is good.
[0004] The current flue is generally made of metal material. When the charged absorbent flows in the flue, due to the principle of opposite charges attracting each other, the charged absorbent will be adsorbed to the metal flue wall and release the charge. The released charge will flow into the ground through the grounding line of the flue. After the charge is released, the absorbent is adsorbed on the flue, the contact area with the flue gas is reduced, and the purification effect of the absorbent is reduced. SUMMARY
[0005] Therefore, the utility model provides a device for purifying flue gas in a flue to improve the purification effect of the absorbent. The specific scheme is as follows:
[0006] To achieve the above purpose, the utility model provides the following technical scheme:
[0007] A device for purifying flue gas in a flue, comprising: an absorbent storage and feeding device and an electrostatic spray gun device, the electrostatic spray gun device comprising a first conveying pipe, an electrostatic spray gun body and a second conveying pipe, the second conveying pipe comprising a flue wall contact part for penetrating the flue wall of the flue and a discharge part for discharging the charged absorbent in the interior of the flue;
[0008] The absorbent feeding end of the absorbent storage and feeding device is in communication with the first end of the first conveying pipe;
[0009] The second end of the first conveying pipe is connected with the electrostatic spray gun body;
[0010] The spray end of the electrostatic spray gun body is in communication with one end of the flue wall contact part, and the flue wall contact part is made of insulating material;
[0011] The other end of the flue wall contact part is in communication with the discharge part, and at least one discharge port is arranged in the discharge part;
[0012] After the discharge part is arranged inside the flue, at least part of the discharge port is located in the central region of the cross section of the flue.
[0013] Preferably, the distance between the geometric center of the discharge port and the flue wall contact part is a first distance;
[0014] The first distance is less than a preset first threshold value and greater than a preset second threshold value, the first threshold value is 0.8 times the diameter of the cross section of the flue, and the second threshold value is 0.2 times the diameter of the cross section of the flue.
[0015] Preferably, it further comprises a bag filter in communication with the discharge end of the flue for removing the absorption product, which is the substance generated after the charged absorbent is mixed with the flue gas.
[0016] Preferably, the electrostatic spray gun body is provided with a discharge electrode, a connecting plate and a grounding electrode, the discharge electrode and the grounding electrode are welded into one body through the connecting plate, and the discharge electrode is used to charge the absorbent.
[0017] Preferably, the discharge electrode comprises a high-voltage cable, a discharge electrode protection tube, a discharge electrode insulation tube and a discharge needle, and the grounding electrode is a grounding electrode tube;
[0018] One end of the discharge needle is electrically connected to the high-voltage cable;
[0019] The discharge needle is arranged inside the discharge electrode insulation tube;
[0020] The discharge electrode insulation tube is arranged inside the discharge electrode protection tube, and the discharge electrode insulation tube is made of insulating material;
[0021] The other end of the discharge needle is exposed outside the discharge electrode insulation tube and the discharge electrode protection tube;
[0022] The discharge needle, the discharge electrode insulation tube and the discharge electrode protection tube are arranged inside the grounding electrode tube, and the discharge needle does not contact the grounding electrode tube.
[0023] Preferably, the second end of the first conveying pipe is connected to the grounding electrode tube.
[0024] Preferably, the connecting plate encloses the first end of the grounding electrode tube;
[0025] The second end of the first conveying pipe is arranged near the first end of the grounding electrode tube;
[0026] The tip of the discharge needle is arranged near the second end of the grounding electrode tube, and the second end is the jetting end.
[0027] Preferably, the second end of the first conveying pipe is communicated with the electrostatic spray gun body at a preset angle.
[0028] Preferably, the discharge port is a strip-shaped discharge port.
[0029] Preferably, the width of the strip-shaped discharge port near one side of the flue wall contact part is smaller than the width of the other side.
[0030] The device for purifying flue gas in a flue disclosed by the embodiment of the present application comprises an absorbent storage and feeding device and an electrostatic spray gun device, wherein the electrostatic spray gun device comprises a first conveying pipe, a second conveying pipe and an electrostatic spray gun body, the second conveying pipe comprises a flue wall contact part for penetrating through the flue wall of the flue and a discharge part for discharging the charged absorbent inside the flue. The absorbent feeding end of the absorbent storage and feeding device is communicated with the first end of the first conveying pipe, the second end of the first conveying pipe is connected with the electrostatic spray gun body, the spraying end of the electrostatic spray gun body is communicated with one end of the flue wall contact part, the flue wall contact part is made of insulating material, and the charge cannot be grounded through the flue wall contact part, thereby avoiding the loss of the charge. The other end of the flue wall contact part is communicated with the discharge part, and at least one discharge port is arranged in the discharge part. After the discharge part is arranged inside the flue, at least part of the area of the discharge port is located in the central area of the cross section of the flue, so that the charged absorbent is far away from the flue wall, and the charged absorbent is sufficient to purify the flue gas before contacting the flue wall, thereby improving the purification effect of the absorbent. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only the embodiments of the present application, and other drawings can also be obtained by the provided drawings without creative labor for those skilled in the art.
[0032] Figure 1 FIG. 1 is a structural schematic view of a device for purifying flue gas in a flue disclosed by the embodiment one of the present application;
[0033] Figure 2 FIG. 2 is a structural schematic view of an electrostatic spray gun device disclosed by the embodiment two of the present application.
[0034] REFERENCE SIGNS:
[0035] 100-absorbent storage and feeding device; 200-electrostatic spray gun device; 300-flue; 400-bag-type dust collector;
[0036] 1 - first delivery pipe; 2 - electrostatic lance body; 3 - second delivery pipe; 4 - flue wall contact portion; 6 - power supply; 21 - discharge electrode; 22 - connecting plate; 23 - grounding electrode; 211 - high-voltage cable; 212 - discharge electrode protection tube; 213 - discharge electrode insulation tube; 214 - discharge needle. DETAILED DESCRIPTION
[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0038] The present inventors have found that the current common method is to transport the charged absorbent to the flue through an external pipeline. When the charged absorbent flows in the pipeline, the absorbent will diffuse to the pipeline wall due to the principle of same polarity repulsion. The pipeline end and the flue wall are tightly connected, the charge at the pipeline outlet will quickly contact the flue wall on both sides, and the charge will flow into the ground through the grounding line of the flue, thereby greatly reducing the purification effect of the absorbent. Therefore, the present application discloses a device for purifying flue gas in a flue, and the structure of the device is described in detail through the following embodiments. Embodiment one
[0039] Reference Figure 1 The present application discloses a device for purifying flue gas in a flue.
[0040] The device for purifying flue gas in the flue 300 comprises an absorbent storage and feeding device 100 and an electrostatic lance device 200. The electrostatic lance device 200 comprises a first delivery pipe 1, an electrostatic lance body 2 and a second delivery pipe 3. The second delivery pipe 3 comprises a flue wall contact portion 4 for penetrating the flue wall of the flue 300 and a discharge portion for discharging the charged absorbent inside the flue 300.
[0041] It should be noted that the first delivery pipe 1 and the discharge portion can be made of metal material, and a welded steel pipe or a seamless steel pipe which is convenient to weld can be selected.
[0042] The absorbent feeding end of the absorbent storage and feeding device 100 is in communication with the first end of the first delivery pipe 1.
[0043] In the present application, the absorbent feeding end of the absorbent storage and feeding device 100 can be in communication with the first end of the first delivery pipe 1 through a pipeline.
[0044] The second end of the first conveying pipe 1 is connected with the electrostatic spray gun body 2.
[0045] In the present application, the second end of the first conveying pipe 1 can be welded to the electrostatic spray gun body 2 at a preset angle, which is large enough to reduce the resistance of the absorbent conveying.
[0046] The spray end of the electrostatic spray gun body is in communication with one end of the flue wall contact part 4, and the flue wall contact part 4 is made of insulating material.
[0047] In the present application, the spray end of the electrostatic spray gun body 2 can be in communication with one end of the flue wall contact part 4 through flange, thread or clamping, etc. The other end of the electrostatic spray gun body 2 is in communication with the discharge end of the power supply 6, which can output high enough voltage and current to make the absorbent carry enough electric charge, specifically, the output voltage range can be 0~100kV and the output current range can be 0~20mA, and the grounding end of the power supply 6 is grounded.
[0048] It should be noted that the insulating material can be ceramic tube, high-aluminum tube, polytetrafluoroethylene tube and mica tube, etc.
[0049] The other end of the flue wall contact part 4 is in communication with the discharge part, and at least one discharge port is arranged in the discharge part.
[0050] In the present application, the other end of the flue wall contact part 4 can be in communication with the discharge part through flange, thread or clamping, etc. The shape of the flue wall contact part 4 is adapted to the purification interface on the flue 300.
[0051] It should be noted that the discharge port can be a strip-shaped discharge port, which can make the absorbent flow in a predetermined direction, avoiding the disorder and diffusion of the absorbent in the flow process, and being conducive to the flow control of the absorbent. Specifically, the width of the strip-shaped discharge port near one side of the flue wall contact part 4 is smaller than the width of the other side, so that the internal resistance of the pipeline near one side of the flue wall contact part 4 is large, the resistance of the discharge port is small, the internal resistance of the pipeline on the other side is small, and the resistance of the discharge port is large, which is conducive to the uniform contact of the absorbent with the flue gas.
[0052] After the discharge part is arranged inside the flue 300, at least part of the area of the discharge port is located in the central area of the cross section of the flue 300.
[0053] In the present application, the distance between the geometric center of the discharge port and the flue wall contact part 4 is a first distance. The first distance can be less than a preset first threshold value and greater than a preset second threshold value, wherein the first threshold value can be 0.8 times the diameter of the cross section of the flue 300, and the second threshold value can be 0.2 times the diameter of the cross section of the flue 300.
[0054] In summary, the utility model discloses a device for purifying flue gas in flue, which comprises: an absorbent storage and feeding device and an electrostatic spray gun device, wherein the electrostatic spray gun device comprises a first conveying pipe, a second conveying pipe and an electrostatic spray gun body, the second conveying pipe comprises a flue wall contact part for passing through the flue wall of the flue and a discharge part for discharging the charged absorbent inside the flue. The absorbent feeding end of the absorbent storage and feeding device is communicated with the first end of the first conveying pipe, the second end of the first conveying pipe is connected with the electrostatic spray gun body, the spray end of the electrostatic spray gun body is communicated with one end of the flue wall contact part, the flue wall contact part is made of insulating material, and the charge cannot be grounded through the flue wall contact part, so that the loss of charge is avoided. The other end of the flue wall contact part is communicated with the discharge part, and at least one discharge port is arranged in the discharge part. After the discharge part is arranged inside the flue, at least part of the area of the discharge port is located in the central area of the cross section of the flue, so that the charged absorbent is far away from the flue wall, and the charged absorbent is sufficient to purify the flue gas before contacting the flue wall, thereby improving the purification effect of the absorbent.
[0055] Further, the device for purifying flue gas in flue further comprises: a bag filter 400 communicated with the discharge end of the flue 300 and used for removing the absorption product, the absorption product being a substance generated after the charged absorbent is mixed with the flue gas, so as to realize further purification. Embodiment two
[0056] Please refer to Figure 2 , the utility model discloses a structure diagram of the electrostatic spray gun body of this embodiment two.
[0057] The electrostatic spray gun body 2 is provided with a discharge electrode 21, a connecting plate 22 and a grounding electrode 23, the discharge electrode 21 and the grounding electrode 23 are welded into an integral whole through the connecting plate 22, and the discharge electrode 21 is used for charging the absorbent.
[0058] The discharge electrode 21 comprises a high-voltage cable 211, a discharge electrode protection tube 212, a discharge electrode insulation tube 213 and a discharge needle 214, and the grounding electrode 23 is a grounding electrode tube.
[0059] In the application, the second end of the first conveying pipe 1 is arranged in the vicinity of the first end of the grounding electrode tube. The connecting plate 22 seals the first end of the grounding electrode tube. The distal end of the discharge needle 214 is arranged in the vicinity of the second end of the grounding electrode tube, and the second end is a spray end.
[0060] The grounding nut can be arranged on the grounding electrode tube, and the grounding wire is fixed on the grounding nut through the grounding nut, so as to realize the grounding of the circuit or equipment, thereby ensuring the safe and stable operation of the circuit or equipment.
[0061] It should be noted that the discharge electrode protection tube 212 can adopt a DN25 seamless steel pipe; the grounding electrode tube can adopt a DN125 seamless steel pipe; the discharge needle 214 is made of a small-diameter and high-strength metal needle, which can be a 304 stainless steel chromium-plated hard shaft.
[0062] One end of the discharge needle 214 is electrically connected with the high-voltage cable 211.
[0063] It should be noted that the high-voltage cable 211 can adopt a high-voltage cable with a withstand voltage of 150kV.
[0064] The discharge needle 214 is arranged inside the discharge electrode insulation tube.
[0065] In the present application, the discharge needle 214 can be concentric with the discharge electrode insulation tube 213.
[0066] The discharge electrode insulation tube is arranged inside the discharge electrode protection tube 212, and the discharge electrode insulation tube 213 is made of an insulating material.
[0067] In the present application, the outer diameter of the discharge electrode insulation tube 213 is consistent with the inner diameter of the discharge electrode protection tube 212.
[0068] The other end of the discharge needle 214 is exposed outside the discharge electrode insulation tube and the discharge electrode protection tube 212.
[0069] In the present application, the part of the discharge needle 214 exposed outside the discharge electrode insulation tube and the discharge electrode protection tube 212 can form a high-voltage charging area with the grounding electrode 23, so that the absorbent is charged.
[0070] The discharge needle 214, the discharge electrode insulation tube 213 and the discharge electrode protection tube 212 are arranged inside the grounding electrode tube, and the discharge needle 214 does not contact the grounding electrode tube.
[0071] In the present application, the outer diameter of the discharge electrode protection tube 212 can be consistent with the inner diameter of the connecting plate 22, and the inner diameter of the grounding electrode tube can be consistent with the outer diameter of the connecting plate 22.
[0072] In summary, the electrostatic spray gun device disclosed in the embodiments of the present application can make the absorbent attach the same charge, so that the absorbent can quickly spread in the flue according to the principle of repulsion between charges of the same nature.
[0073] It should be noted that in the present specification, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations.
[0074] Also, the use of "adapted to," "configured to," "designed to," "fabricated to," "formed to," "manufactured to," "shaped to," "specially constructed to," and other similar expressions, are intended to refer to something that is made, constructed, or otherwise formed to do something, and is not intended to convey a concept of something that is adapted, configured, designed, fabricated, formed, manufactured, or shaped to do something. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a... " does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.
[0075] Those skilled in the art will further appreciate that the units and algorithms described in connection with the examples disclosed herein can be embodied directly in hardware, in software, or in a combination of the two. For the sake of brevity, descriptions of these alternatives are not repeated here. In the interest of clarity, not all of the individual components of the examples described herein are shown in the figures. Those skilled in the art will appreciate that the implementations described herein can include any general-purpose computing article of manufacture comprising, for example, hardware and software modules that can be executed on one or more computers to implement the methods described herein. For example, a general-purpose computing article of manufacture can include computer hardware, for example, a processing unit, a memory, and input / output (I / O) interface, and a bus for allowing communications between these computer hardware components. The general-purpose computing article of manufacture can also include software modules that are executable on the computer hardware. The software modules can include, for example, a kernel or operating system, device drivers, installed application software, and code that can be written or otherwise generated by a developer in connection with implementing the methods described herein, such as code for implementing the methods described herein. The general-purpose computing article of manufacture can also include computer-readable media that can store the software modules. The computer-readable media can include, for example, one or more types of removable non-removable memory devices implemented using technology that can include, for example, semiconductor-based memory devices, hard disk drives, or optical storage devices.
[0076] The above description of disclosed embodiments provides examples, and is not intended to be limiting. Numerous variations, additions, omissions and other modifications not specifically described can be made to the disclosed embodiments. Specifically, any of the disclosed examples can be combined with one another or with other known methods, devices, systems, components, materials, and techniques, without departing from the spirit or scope of the disclosure. Accordingly, the present disclosure is not intended to be limited to the examples described herein but rather is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
[0077] Accordingly, the present disclosure is not intended to be limited to the examples described herein, but rather is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An apparatus for cleaning flue gas in a flue, characterized in that The application relates to a flue gas absorption device, comprising: an absorbent storage feeding device and an electrostatic spray gun device, the electrostatic spray gun device comprising a first conveying pipe, an electrostatic spray gun body and a second conveying pipe, the second conveying pipe comprising a flue wall contact part for penetrating a flue wall of the flue and a discharging part for discharging charged absorbent inside the flue; an absorbent feeding end of the absorbent storage feeding device being in communication with a first end of the first conveying pipe; a second end of the first conveying pipe being connected with the electrostatic spray gun body; a spraying end of the electrostatic spray gun body being in communication with one end of the flue wall contact part, the flue wall contact part being made of insulating material; the other end of the flue wall contact part being in communication with the discharging part, at least one discharging opening being arranged in the discharging part; after the discharging part is arranged inside the flue, at least part of the discharging opening is located in a central area of a cross section of the flue.
2. The device for purifying flue gas according to claim 1, wherein a distance between a geometric center of the discharging opening and the flue wall contact part is a first distance; the first distance is smaller than a preset first threshold value and larger than a preset second threshold value, the first threshold value being 0.8 times of a cross section diameter of the flue, and the second threshold value being 0.2 times of the cross section diameter of the flue.
3. The device for purifying flue gas according to claim 1, wherein The application further comprises: a bag filter in communication with a discharging end of the flue, used for removing absorption products, the absorption products being substances generated after the charged absorbent is mixed with the flue gas.
4. The device for purifying flue gas according to claim 1, wherein the electrostatic spray gun body is provided with a discharge electrode, a connecting plate and a grounding electrode, the discharge electrode and the grounding electrode are welded into an integrated body through the connecting plate, and the discharge electrode is used for charging the absorbent.
5. The device for cleaning flue gases according to claim 4, characterized in that, the discharge electrode comprises a high-voltage cable, a discharge electrode protection pipe, a discharge electrode insulation pipe and a discharge needle, and the grounding electrode is a grounding electrode pipe; one end of the discharge needle is electrically connected with the high-voltage cable; the discharge needle is arranged inside the discharge electrode insulation pipe; the discharge electrode insulation pipe is arranged inside the discharge electrode protection pipe, and the discharge electrode insulation pipe is made of insulating material; the other end of the discharge needle is exposed outside the discharge electrode insulation pipe and the discharge electrode protection pipe; the discharge needle, the discharge electrode insulation pipe and the discharge electrode protection pipe are arranged inside the grounding electrode pipe, and the discharge needle does not contact the grounding electrode pipe.
6. The device for cleaning flue gases according to claim 5, characterized in that, a second end of the first conveying pipe is connected with the grounding electrode pipe.
7. The device for cleaning flue gases according to claim 5, characterized in that, the connecting plate seals a first end of the grounding electrode pipe; the second end of the first conveying pipe is arranged near the first end of the grounding electrode pipe; a terminal end of the discharge needle is arranged near a second end of the grounding electrode pipe, and the second end is the spraying end.
8. The device for cleaning flue gases according to claim 1, characterized in that, the second end of the first conveying pipe is in communication with the electrostatic spray gun body at a preset angle.
9. The device for cleaning flue gases according to claim 1, characterized in that, the discharging opening is a strip-shaped discharging opening.
10. The device for cleaning flue gases according to claim 9, characterized in that, the width of the strip-shaped discharging opening near one side of the flue wall contact part is smaller than the width of the other side.