A detachable cloth bag dust collector injection pipe structure

Abstract

The utility model discloses an anti-corrosion detachable cloth bag dust collector injection pipe structure, including injection vertical pipe, intermediate pipe, anticorrosion device, elbow and injection horizontal pipe, the upper end part of clean storehouse is equipped with a closed baffle, anticorrosion protection sleeve is embedded in the through -hole, and anticorrosion protection sleeve is located on the outer peripheral wall of intermediate pipe, and the outer peripheral wall of anticorrosion protection sleeve and the inner peripheral wall of through -hole are sealedly connected, and the inner peripheral wall of anticorrosion protection sleeve and the outer peripheral wall of intermediate pipe are sealedly connected, and the height of anticorrosion protection sleeve is greater than the height setting of through -hole, and the elbow is set up in the lower end part of intermediate pipe, and the upper and lower both ends of intermediate pipe are respectively with the lower end part of injection vertical pipe and the upper end part of elbow detachable sealed connection, and one end of injection horizontal pipe and the lower end part of elbow are detachably closed connection. The utility model discloses a technical scheme can effectively avoid injection pipe to appear corrosion perforation failure phenomenon, and installation and dismounting are convenient and quick, and it is convenient for later dismounting overhauling maintenance.

Description

Technical Field

[0001] This utility model relates to the field of hazardous waste exhaust gas purification and treatment technology, and in particular to a corrosion-resistant, detachable bag filter blowpipe structure. Background Technology

[0002] Dust removal from hazardous waste incineration flue gas is a crucial step in ensuring environmental safety and compliant emissions. The flue gas produced by hazardous waste incineration contains highly toxic heavy metals (such as mercury, lead, and cadmium), highly corrosive acidic gases (HCl, SOx, and HF), and highly toxic dioxins. These pollutants mostly adhere to the surface of submicron-sized particulate matter. With the implementation of the "Standard for Pollution Control of Hazardous Waste Incineration" (GB 18484-2020), the national requirements for dust content in flue gas have become more stringent.

[0003] A baghouse dust collector is a dry dust filtration device. It is suitable for collecting fine, dry, non-fibrous dust. The filter bags are made of woven filter cloth or non-woven felt, utilizing the filtration effect of the fibrous fabric to filter dust-laden gas. When the dust-laden gas enters the baghouse dust collector, larger, heavier dust particles settle due to gravity and fall into the ash hopper. The gas containing finer dust particles is purified as it passes through the filter media, where the dust is trapped. The low-pressure pulse baghouse dust collector uses an external filtration method. Dust-laden gas enters each unit's filtration chamber through a guide pipe. Due to the sufficient vertical distance between the bottom of the filter bag and the top of the air inlet, and the appropriate airflow distribution through proper guidance and natural flow, the air distribution within the entire filtration chamber is uniform. Particulate dust in the dust-laden gas falls directly into the ash hopper after natural sedimentation. The remaining dust, guided by the guide system, enters the middle chamber filtration area with the airflow and is adsorbed on the outer surface of the filter bags. The filtered clean gas passes through the filter bags and is discharged through the upper chamber and exhaust pipe. The filter bags are cleaned using compressed air pulse-jet cleaning. The cleaning mechanism consists of an air tank, pulse-jet pipes, and electromagnetic pulse control valves. Each row of filter bags in the filter chamber has a pulse-jet pipe at the top of its outlet. A nozzle is located on the underside of the pulse-jet pipe, directly opposite the center of the filter bag. Each pulse-jet pipe is equipped with a pulse valve connected to the compressed air tank. During cleaning, the electromagnetic pulse-jet system, controlled by the cleaning control device (differential pressure, timer, or manual control), initiates the cleaning process. The compressed gas passes through each pulse valve sequentially and through the nozzles on the pulse-jet pipes, inducing several times the volume of air into the filter bags. This creates an air wave, causing the filter bags to expand rapidly and vibrate from the opening to the bottom, resulting in a strong cleaning effect and shaking off the dust.

[0004] However, the connection area between the blowpipe and the cleaning chamber isolation plate of existing pulse jet baghouse dust collectors on the market usually lacks a corrosion-resistant structure. Under hazardous waste incineration conditions, the blowpipe faces a severe risk of corrosion failure. The main reason is that when the flue gas temperature in the cleaning chamber fluctuates around the acid dew point (120-150℃), acidic gases such as HCl, SO2, and HF condense on the metal surface of the connection area between the blowpipe and the cleaning chamber isolation plate, forming a highly corrosive liquid film with a pH of 1-3. High concentrations of Cl⁻ and F⁻ trigger a synergistic effect of pitting and intergranular corrosion, making the blowpipe prone to corrosion perforation failure, forcing shutdown for maintenance. Furthermore, most existing blowpipes currently use a one-piece design, making disassembly, maintenance, and replacement inconvenient. Often, the entire blowpipe needs to be cut off and re-welded, making installation and disassembly time-consuming and labor-intensive.

[0005] Therefore, we propose a corrosion-resistant, detachable blowpipe structure for baghouse dust collectors. Utility Model Content

[0006] The main objective of this invention is to propose a corrosion-resistant, detachable blowpipe structure for a baghouse dust collector, aiming to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model proposes a corrosion-resistant, detachable baghouse dust collector blowpipe structure, including a vertical blowpipe, a middle pipe, an anti-corrosion device, an elbow, and a horizontal blowpipe. A closed isolation plate is provided at the upper end of the cleaning chamber. The vertical blowpipe is positioned above the isolation plate, and its upper end is connected to a blowpipe cylinder. The middle pipe is located at the lower end of the vertical blowpipe. The anti-corrosion device includes an anti-corrosion protective sleeve. The isolation plate has a recessed through-hole, and the anti-corrosion protective sleeve is embedded within the through-hole. On the outer peripheral wall of the intermediate pipe, the outer peripheral wall of the anti-corrosion protective sleeve is sealed to the inner peripheral wall of the through hole, and the inner peripheral wall of the anti-corrosion protective sleeve is sealed to the outer peripheral wall of the intermediate pipe. The height of the anti-corrosion protective sleeve is greater than the height of the through hole. The elbow is located at the lower end of the intermediate pipe. The upper and lower ends of the intermediate pipe are detachably and sealed to the lower end of the vertical spray pipe and the upper end of the elbow, respectively. One end of the horizontal spray pipe is detachably and closed to the lower end of the elbow. The lower end of the horizontal spray pipe is provided with multiple bag spray pipes along its length.

[0008] Optionally, the corrosion protection device further includes a protective housing, which is configured as a sleeve and is embedded in the through hole. The outer peripheral wall of the protective housing and the inner peripheral wall of the through hole are sealed together by sealant, and the corrosion protection sleeve is detachably embedded in the protective housing.

[0009] Optionally, the anti-corrosion device further includes a pressure plate and a first fastening bolt. The pressure plate is arranged in a circular ring structure and is respectively disposed on the upper and lower end walls of the protective shell. The pressure plate and the two side walls of the protective shell are respectively provided with a first bolt hole and a second bolt hole. The first fastening bolt passes through the first bolt hole and the second bolt hole respectively. A fastening nut is screwed on the upper end of the first fastening bolt. The upper and lower ends of the anti-corrosion protective sleeve abut against the pressure plate.

[0010] Optionally, the outer peripheral wall of the upper end of the protective housing is provided with a limiting flange protruding in the circumferential direction, and the lower end wall of the limiting flange abuts against the upper end wall of the through hole.

[0011] Optionally, it further includes a first connecting sleeve, the upper end and the lower end of the first connecting sleeve are respectively provided with a first receiving groove, the lower end of the spray vertical pipe and the upper end of the intermediate pipe are respectively detachably embedded in the first receiving groove, and the outer peripheral wall of the lower end of the spray vertical pipe and the upper end of the intermediate pipe are both interference fit connected with the inner peripheral wall of the first receiving groove.

[0012] Optionally, it also includes a second fastening bolt, wherein the outer peripheral wall of the lower end of the first connecting sleeve is provided with a threaded hole, the second fastening bolt is screwed into the threaded hole, and the front end of the second fastening bolt abuts against the outer peripheral wall of the intermediate tube.

[0013] Optionally, a limiting groove is provided on the outer peripheral wall of the upper end of the intermediate tube, and the front end of the second fastening bolt is embedded in the limiting groove.

[0014] Optionally, it also includes a second connecting sleeve, which is respectively disposed at both ends of the elbow. The upper end of the second connecting sleeve is respectively provided with a second receiving groove. The lower end of the intermediate tube and the rear end of the horizontal spray tube are respectively detachably embedded in the second receiving groove. The outer peripheral wall of the lower end of the intermediate tube and the rear end of the horizontal spray tube are both interference fit connected with the inner peripheral wall of the second receiving groove.

[0015] Optionally, the corrosion-resistant protective sleeve is made of PTFE material.

[0016] Optionally, the vertical jet pipe, intermediate pipe, elbow, and horizontal jet pipe are all made of 2205 stainless steel.

[0017] The technical solution of this utility model has the following beneficial effects: The technical solution of this utility model connects the upper end of the vertical spray pipe to the spray cylinder, and the intermediate pipe is located at the lower end of the vertical spray pipe. The anti-corrosion device includes an anti-corrosion protective sleeve, a partition plate with a through hole, the anti-corrosion protective sleeve being embedded in the through hole and located on the outer peripheral wall of the intermediate pipe. The outer peripheral wall of the anti-corrosion protective sleeve is sealed to the inner peripheral wall of the through hole, and the inner peripheral wall of the anti-corrosion protective sleeve is sealed to the outer peripheral wall of the intermediate pipe. The height of the anti-corrosion protective sleeve is greater than the height of the through hole. An elbow is located at the lower end of the intermediate pipe, and the upper and lower ends of the intermediate pipe are respectively connected to the vertical spray pipe. The lower end of the nozzle and the upper end of the elbow are detachably sealed. One end of the horizontal spray pipe is detachably sealed to the lower end of the elbow. The outer circumferential wall of the intermediate pipe located in the through hole of the isolation plate in the clean chamber is wrapped by an anti-corrosion protective sleeve, which can effectively prevent corrosive gases from entering the through hole of the isolation plate, isolate chemical corrosive media from electrochemical corrosion pathways, and provide good anti-corrosion effect for the spray pipe, extend its service life, and effectively avoid corrosion perforation failure of the spray pipe. In addition, this utility model adopts a multi-section split structure design, which makes it convenient and quick to install and disassemble each section, and facilitates later disassembly, inspection and maintenance. Compared with the traditional welding fixing method, it greatly reduces the inspection and maintenance cost and has strong practicality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a corrosion-resistant, detachable bag filter blowpipe according to an embodiment of the present invention. Figure 2 This is a cross-sectional schematic diagram of the middle pipe of a corrosion-resistant, detachable bag filter dust collector blowpipe structure according to an embodiment of the present invention. Figure 3 This is a cross-sectional structural schematic diagram of an anti-corrosion device for a detachable bag filter dust collector blowpipe structure, according to an embodiment of the present invention. Figure 4 This is a partial structural diagram of a corrosion-resistant, detachable bag filter dust collector blowpipe structure according to an embodiment of the present invention. Figure 5 This is a schematic diagram of another part of the structure of a corrosion-resistant, detachable bag filter blowpipe according to an embodiment of the present invention.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0023] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] This utility model proposes a corrosion-resistant, detachable blowpipe structure for a bag filter dust collector.

[0025] like Figures 1 to 5As shown, in one embodiment of this utility model, the corrosion-resistant detachable bag filter blowpipe structure includes a vertical blowpipe 102, an intermediate pipe 103, an anti-corrosion device 104, an elbow 105, and a horizontal blowpipe 106. A closed isolation plate 200 is provided at the upper end of the cleaning chamber. A blowpipe cylinder 101 and the vertical blowpipe 102 are located above the isolation plate 200. The upper end of the vertical blowpipe 102 is connected to the blowpipe cylinder 101. The intermediate pipe 103 is located at the lower end of the vertical blowpipe 102. The anti-corrosion device 104 includes an anti-corrosion protective sleeve 1041. The isolation plate 200 has a recessed through hole (not shown), and the anti-corrosion protective sleeve 1041 is embedded in the through hole. A corrosion-resistant protective sleeve 1041 is provided on the outer peripheral wall of the intermediate pipe 103. The outer peripheral wall of the corrosion-resistant protective sleeve 1041 is sealed to the inner peripheral wall of the through hole. The inner peripheral wall of the corrosion-resistant protective sleeve 1041 is sealed to the outer peripheral wall of the intermediate pipe 103. The height of the corrosion-resistant protective sleeve 1041 is greater than the height of the through hole. An elbow 105 is provided at the lower end of the intermediate pipe 103. The upper and lower ends of the intermediate pipe 103 are detachably and sealed to the lower end of the vertical spray pipe 102 and the upper end of the elbow 105, respectively. One end of the horizontal spray pipe 106 is detachably and sealed to the lower end of the elbow 105. The lower end of the horizontal spray pipe 106 is provided with multiple bag spray pipes 1061 along the length direction.

[0026] Specifically, the anti-corrosion device 104 also includes a protective housing 1042, which is a sleeve structure. The protective housing 1042 is embedded in the through hole, and the outer peripheral wall of the protective housing 1042 is sealed to the inner peripheral wall of the through hole by sealant. The anti-corrosion protective sleeve 1041 is detachably embedded in the protective housing 1042. The protective housing provides support and protection for the anti-corrosion protective sleeve, isolates the chemical corrosive medium from the electrochemical corrosion path, and effectively prevents the intermediate pipe located in the through hole of the isolation plate of the clean compartment from being corroded, thus providing a double protection effect for the intermediate pipe.

[0027] Specifically, the anti-corrosion device 104 also includes a pressure plate 1043 and a first fastening bolt 1044. The pressure plate 1043 is arranged in a ring structure and is respectively disposed on the upper and lower end walls of the protective housing 1042. The pressure plate 1043 and the protective housing 1042 are respectively provided with a first bolt hole (not shown) and a second bolt hole (not shown). The first fastening bolt 1044 is respectively inserted into the first bolt hole and the second bolt hole. A fastening nut 1045 is screwed on the upper end of the first fastening bolt 1044. The upper and lower ends of the anti-corrosion protective sleeve 1041 abut against the pressure plate 1043. The pressure plate plays the role of fixing the anti-corrosion protective sleeve and preventing the anti-corrosion protective sleeve from loosening.

[0028] Specifically, the outer peripheral wall of the upper end of the protective shell 1042 is provided with a limiting flange 1046 protruding in the circumferential direction. The lower end wall of the limiting flange 1046 abuts against the upper end wall of the through hole. The limiting flange plays a supporting role and also seals the through hole of the isolation plate, which can further prevent the leakage of high-temperature exhaust gas in the clean chamber.

[0029] Specifically, it also includes a first connecting sleeve 107. The upper end and lower end of the first connecting sleeve 107 are respectively provided with a first receiving groove 1071. The lower end of the spray vertical pipe 102 and the upper end of the intermediate pipe 103 are respectively detachably embedded in the first receiving groove 1071. The outer peripheral wall of the lower end of the spray vertical pipe 102 and the upper end of the intermediate pipe 103 are both interference fit connected with the inner peripheral wall of the first receiving groove 1071, so that the installation and disassembly between the intermediate pipe and the spray vertical pipe are more convenient and quick, and facilitate subsequent disassembly, inspection and maintenance.

[0030] Specifically, it also includes a second fastening bolt 108. The outer peripheral wall of the lower end of the first connecting sleeve 107 is provided with a threaded hole (not shown). The second fastening bolt is screwed into the threaded hole. The front end of the second fastening bolt 108 abuts against the outer peripheral wall of the intermediate tube 103, making the assembly between the first connecting sleeve and the intermediate tube more secure and reliable, thereby effectively preventing the first connecting sleeve from falling off the intermediate tube.

[0031] Specifically, a limiting groove 1031 is provided on the outer peripheral wall of the upper end of the intermediate tube 103, and the front end of the second fastening bolt 108 is embedded in the limiting groove 1031, so that the assembly between the first connecting sleeve and the intermediate tube is more secure and reliable, and further prevents the first connecting sleeve from falling off the intermediate tube.

[0032] Specifically, it also includes a second connecting sleeve 109, which is respectively disposed at both ends of the elbow 105. The upper end of the second connecting sleeve 109 is respectively provided with a second receiving groove 1091. The lower end of the intermediate pipe 103 and the rear end of the spray horizontal pipe 106 are respectively detachably embedded in the second receiving groove 1091. The outer peripheral wall of the lower end of the intermediate pipe 103 and the rear end of the spray horizontal pipe 106 are both interference fit connected with the inner peripheral wall of the second receiving groove, thereby making the installation and disassembly of the intermediate pipe, elbow and spray horizontal pipe more convenient and quick, and facilitating later disassembly, inspection and maintenance.

[0033] Specifically, the corrosion-resistant protective sleeve 1041 is made of PTFE material. Polytetrafluoroethylene (PTFE), also known as Teflon, is a high-molecular polymer polymerized from tetrafluoroethylene as a monomer, with the chemical formula (C2F4)n. It has excellent heat and cold resistance and can be used for extended periods at temperatures ranging from -180 to 260ºC. This material is resistant to acids, alkalis, and various organic solvents, and is almost insoluble in all solvents. PTFE also has high-temperature resistance. Regarding corrosion protection: PTFE material, due to its outstanding corrosion resistance, has been widely used in many industries such as petroleum and textiles. Therefore, it provides excellent protection for the intermediate pipe located within the through-hole of the cleanroom isolation plate, isolating it from chemical and electrochemical corrosion, and effectively preventing corrosion and perforation failure of the blowpipe.

[0034] Specifically, the vertical spray pipe 102, the intermediate pipe 103, the elbow 105, and the horizontal spray pipe 106 are all made of 2205 stainless steel, which has good resistance to chloride ion corrosion.

[0035] Specifically, the working principle of this utility model is as follows: By wrapping the outer wall of the intermediate pipe located inside the through hole of the isolation plate in the clean compartment with an anti-corrosion protective sleeve, corrosive gases can be effectively prevented from entering the through hole of the isolation plate, isolating chemical corrosive media from electrochemical corrosion pathways, providing good anti-corrosion effect for the blowpipe, extending its service life, and effectively avoiding corrosion perforation failure of the blowpipe. In addition, this utility model adopts a multi-section split structure design, which makes it convenient and quick to install and disassemble each section, facilitating later disassembly, inspection and maintenance. Compared with the traditional welding fixing method, it greatly reduces the inspection and maintenance cost and has strong practicality.

[0036] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A corrosion-resistant, detachable blowpipe structure for a baghouse dust collector, characterized in that, The system includes a vertical spray pipe, an intermediate pipe, an anti-corrosion device, elbows, and a horizontal spray pipe. A closed partition plate is installed at the upper end of the cleaning chamber. The vertical spray pipe is positioned above the partition plate, and its upper end is connected to a spray cylinder. The intermediate pipe is located at the lower end of the vertical spray pipe. The anti-corrosion device includes an anti-corrosion protective sleeve. The partition plate has a recessed through-hole, and the anti-corrosion protective sleeve is embedded within the through-hole and positioned on the outer peripheral wall of the intermediate pipe. The outer peripheral wall of the tube is sealed to the inner peripheral wall of the through hole, and the inner peripheral wall of the anti-corrosion protective sleeve is sealed to the outer peripheral wall of the intermediate tube. The height of the anti-corrosion protective sleeve is greater than the height of the through hole. The elbow is located at the lower end of the intermediate tube. The upper and lower ends of the intermediate tube are detachably and sealed to the lower end of the vertical spray pipe and the upper end of the elbow, respectively. One end of the horizontal spray pipe is detachably and closed to the lower end of the elbow. The lower end of the horizontal spray pipe is provided with multiple bag spray pipes along its length.

2. The corrosion-resistant detachable bag filter blowpipe structure according to claim 1, characterized in that, The corrosion protection device also includes a protective housing, which is a sleeve structure. The protective housing is embedded in the through hole, and the outer peripheral wall of the protective housing is sealed to the inner peripheral wall of the through hole by a sealant. The corrosion protection sleeve is detachably embedded in the protective housing.

3. The corrosion-resistant, detachable bag filter dust collector blowpipe structure according to claim 2, characterized in that, The anti-corrosion device further includes a pressure plate and a first fastening bolt. The pressure plate is arranged in a circular ring structure and is respectively disposed on the upper and lower end walls of the protective shell. The pressure plate and the two side walls of the protective shell are respectively provided with a first bolt hole and a second bolt hole. The first fastening bolt passes through the first bolt hole and the second bolt hole respectively. A fastening nut is screwed on the upper end of the first fastening bolt. The upper and lower ends of the anti-corrosion protective sleeve abut against the pressure plate.

4. The corrosion-resistant, detachable bag filter dust collector blowpipe structure according to claim 2, characterized in that, The outer peripheral wall of the upper end of the protective shell is provided with a limiting flange protruding in the circumferential direction, and the lower end wall of the limiting flange abuts against the upper end wall of the through hole.

5. The corrosion-resistant, detachable bag filter dust collector blowpipe structure according to claim 1, characterized in that, It also includes a first connecting sleeve, the upper end and the lower end of the first connecting sleeve are respectively provided with a first receiving groove, the lower end of the spray vertical pipe and the upper end of the middle pipe are respectively detachably embedded in the first receiving groove, and the outer peripheral wall of the lower end of the spray vertical pipe and the upper end of the middle pipe are both interference fit connected with the inner peripheral wall of the first receiving groove.

6. The corrosion-resistant, detachable bag filter dust collector blowpipe structure according to claim 5, characterized in that, It also includes a second fastening bolt. The outer peripheral wall of the lower end of the first connecting sleeve is provided with a threaded hole. The second fastening bolt is screwed into the threaded hole, and the front end of the second fastening bolt abuts against the outer peripheral wall of the intermediate tube.

7. The corrosion-resistant, detachable bag filter blowpipe structure according to claim 6, characterized in that, The upper end of the intermediate tube has a limiting groove on its outer peripheral wall, and the front end of the second fastening bolt is embedded in the limiting groove.

8. The corrosion-resistant, detachable bag filter dust collector blowpipe structure according to claim 1, characterized in that, It also includes a second connecting sleeve, which is respectively disposed at both ends of the elbow. The upper end of the second connecting sleeve is respectively provided with a second receiving groove. The lower end of the intermediate tube and the rear end of the horizontal spray tube are respectively detachably embedded in the second receiving groove. The outer peripheral wall of the lower end of the intermediate tube and the rear end of the horizontal spray tube are both interference fit connected with the inner peripheral wall of the second receiving groove.

9. The corrosion-resistant, detachable bag filter dust collector blowpipe structure according to claim 1, characterized in that, The corrosion-resistant protective sleeve is made of PTFE material.

10. The corrosion-resistant, detachable bag filter blowpipe structure according to claim 1, characterized in that, The vertical jet pipe, intermediate pipe, elbow, and horizontal jet pipe are all made of 2205 stainless steel.

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