Machining method for jacket type heat tracing dust remover

Abstract

The invention discloses a processing method for a jacket type heat tracing dust remover, which comprises the following steps of: preparing an inner cylinder and an outer cylinder of the dust remover in sections, preferably installing auxiliary pipe parts after the inner cylinder is processed, and then processing the outer cylinder, so that the processing difficulty can be reduced on the premise of ensuring the production quality; and the processing yield of the jacket type heat tracing dust remover is more effectively improved, and the construction period is shortened.

Description

Technical Field

[0001] The invention relates to the field of jacketed pressure vessels, and in particular to a processing method for a jacketed heating dust collector. Background Art

[0002] The jacketed heated dust collector is a thin-walled container suitable for low-pressure and general load-bearing application scenarios. It has a light weight and good economy. It is a dust removal equipment in which a jacket is set on the outer wall of the dust collector to form a sandwich between the outer wall of the dust collector, and a heat source medium is added to the sandwich through a heat source device. The use of the heat source in the sandwich to heat the dust collector can ensure that when the dust collector handles hygroscopic or deliquescent dust, it can avoid the formation of viscous liquid or more serious compaction on the inner wall of the dust collector or the dust outlet due to the dust absorbing water, which will cause cleaning difficulties and increased pressure loss, affecting the cleaning efficiency and production energy efficiency. This type of dust collector is widely used in a variety of industrial fields, such as steel, electricity or chemical industry, and can effectively remove dust particles in a specified environment, meet environmental protection requirements, and thus increase production capacity.

[0003] However, this type of dust collector (total height of about 15 meters, cone section of about 5 meters, diameter of about 3.5 meters) can only be assembled and welded at the construction site due to the constraints of structural type and transportation conditions. When the construction environment and equipment cannot meet the processing requirements, it is difficult to meet the high quality requirements of the finished product, especially for this kind of thin-walled equipment with large overall size and airtightness requirements.

[0004] The processing and manufacturing of thin-walled jacketed heated dust collectors have the following characteristics:

[0005] (1) The curved surface structure is complex and there are many intersections with different diameters;

[0006] The conical section of the dust collector has multiple layers of annular spiral backflush pipes (annular spiral combined pipe fittings) that penetrate the inner and outer walls of the cylinder to form multi-directional small angles, and also has multi-directional different-diameter intersecting interfaces such as ash unloading pipes, air inlets and outlets.

[0007] The straight section of the dust collector has dense blowing pipes and heating inlets and outlets. The various components are connected to the dust collector cylinder in multiple directions, forming complex intersecting nodes, which makes layout difficult, assembly complex, and size difficult to guarantee. In particular, the openings of the blowing main pipe are dense, and the size and position of the openings of the inner and outer cylinders of the jacketed heating dust collector are difficult to determine. If the size deviation is too large, the main cylinder will be scrapped.

[0008] A partition for guiding the flow direction of the heat source medium is arranged in the interlayer of the dust collector. The partition is in a spiral shape and spirals along the entire length of the dust collector. During construction, due to the large segmentation error of the partition, it is difficult to control the fitting gap between the outer cylinder and the partition, which makes it easier to deform during subsequent through-mouth processing, affecting the processing accuracy. The correction process affects the construction efficiency.

[0009] (2) Difficult positioning and hard to guarantee assembly dimensions;

[0010] On the one hand, due to reasons such as large volume and easy rolling of this dust collector, the effective working surface is limited; on the other hand, restricted by the thin plate forming process, it is very difficult to form regular cylindrical or conical structures after curling, resulting in difficulties in positioning and alignment during the assembly of cylinder sections, and further leading to difficulties in controlling the straightness, roundness and cumulative error of the overall assembly.

[0011] (3) High welding difficulty and strict welding quality requirements;

[0012] This dust collector not only requires weld inspections such as RT (radiographic testing), UT (ultrasonic flaw detection) and PT (penetrant testing), but also requires an overall airtightness test in the end. The requirements for weld quality are extremely high, which particularly tests the skill level of construction workers, resulting in large differences in finished products.

[0013] In addition, the volume of the cylinder body is large, and auxiliary operations such as a rotary jig are required for circumferential seam welding. On the one hand, this increases the operation difficulty and makes it difficult to guarantee the welding quality. On the other hand, when the cylinder body rotates, the operators are working at a height of more than 3 meters without a stable attachment point, greatly increasing the safety hazards.

[0014] The base material is thin and the nozzle structure is complex, and weld defects such as burn-through of the base material, lack of fusion and missed welding are likely to occur during welding.

[0015] (4) Difficult airtightness test and long cycle;

[0016] Both the inner cylinder and the outer cylinder of this dust collector need to ensure qualified airtightness. Due to the thin cylinder wall, it is easy to burn through the base material during the welding process, leaving hidden leakage points. At the same time, there are many seams and joints, the welding volume is large, and it is difficult to detect leakage points.

[0017] During the repair and pressure test processes, it is necessary to continuously release and pressurize. Due to the large volume and complex structure type of the dust collector, the test cycle is long, and the test results are also significantly affected by external factors such as weather and environment.

[0018] Therefore, to solve the above problems, a processing method for a jacketed heat tracing dust collector is needed, which can reduce the processing difficulty, more effectively improve the processing yield of the jacketed heat tracing dust collector and shorten the construction cycle on the premise of ensuring the production quality. Summary of the Invention

[0019] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a processing method for a jacketed heat tracing dust collector, which can reduce the processing difficulty, more effectively improve the processing yield of the jacketed heat tracing dust collector and shorten the construction cycle on the premise of ensuring the production quality.

[0020] The processing method for the jacket-type heat tracing dust collector of the present invention comprises the following steps:

[0021] S1. Obtain the inner cylinder plane development design drawing of the jacket-type heat tracing dust collector and the outer cylinder plane development design drawing of the jacket-type heat tracing dust collector;

[0022] The positions and dimensions of the accessory pipe type components are respectively and correspondingly marked on the inner cylinder plane development design drawing and the outer cylinder plane development design drawing;

[0023] The accessory pipe type components include a backflush pipe arranged in the conical cylinder section of the dust collector and a blowpipe arranged in the straight cylinder section of the dust collector;

[0024] The backflush pipe includes a soot blowing ring pipe arranged around the outside of the conical cylinder section of the dust collector and a soot blowing nozzle pipe that connects the soot blowing ring pipe and the inner cavity of the conical cylinder section of the dust collector;

[0025] The soot blowing ring pipe is coaxial with the conical cylinder section of the dust collector, and the soot blowing nozzle pipe includes a plurality of pipes evenly distributed radially along the soot blowing ring pipe;

[0026] The blowpipe includes a blowpipe main pipe arranged outside the straight cylinder section of the dust collector and a blowpipe auxiliary pipe arranged inside the straight cylinder section of the dust collector. Multiple groups of blowpipe auxiliary pipes are arranged in the inner cavity of the straight cylinder section of the dust collector, and each group of blowpipe auxiliary pipes is communicated with the blowpipe main pipe through a connecting pipe correspondingly penetrating through the straight cylinder section of the dust collector;

[0027] S2. The inner cylinder plane development design drawing includes an inner cylinder conical cylinder section, an inner cylinder straight cylinder section, and an inner cylinder top cover; the outer cylinder plane development design drawing includes an outer cylinder conical cylinder section, an outer cylinder straight cylinder section, and an outer cylinder top cover;

[0028] The inner cylinder conical cylinder section, the inner cylinder straight cylinder section, the outer cylinder conical cylinder section, and the outer cylinder straight cylinder section are respectively and correspondingly divided into several pieces;

[0029] S3. Lofting and blanking to obtain several segments for processing several pieces of the inner cylinder conical cylinder section, the inner cylinder straight cylinder section, the outer cylinder conical cylinder section, and the outer cylinder straight cylinder section, as well as the inner cylinder top cover and the outer cylinder top cover;

[0030] S4. Cylinder section rolling, corresponding to rolling several pieces into sheet-like segments with a set radian or cylindrical segments with a set roundness;

[0031] The pieces corresponding to processing the inner cylinder conical cylinder section and the outer cylinder conical cylinder section are rolled into sheet-like segments with a set radian; the pieces corresponding to processing the inner cylinder straight cylinder section and the outer cylinder straight cylinder section are rolled into cylindrical segments with a set roundness;

[0032] S5. Processing of the inner cylinder straight cylinder section;

[0033] S5a. Weld several cylindrical segments for machining the straight section of the inner cylinder respectively along the longitudinal seam to form several inner cylinder straight section segments for machining the straight section of the inner cylinder;

[0034] S5b. Weld the inner cylinder top cover onto one of the inner cylinder straight section segments;

[0035] Before welding the inner cylinder straight section segment and the inner cylinder top cover, weld annular stiffeners on the inner wall of the inner cylinder straight section segment;

[0036] The annular stiffeners are arranged at one end of the inner cylinder straight section segment close to the inner cylinder top cover;

[0037] When welding the inner cylinder top cover onto the set inner cylinder straight section segment, the axis of the inner cylinder straight section segment is perpendicular to the horizontal plane, and the inner cylinder top cover closes the top opening of the inner cylinder straight section segment;

[0038] S5c. Rectify the inner cylinder straight section segment welded with the inner cylinder top cover so that the roundness and straightness of this section of the inner cylinder straight section segment meet the preset standards;

[0039] S5d. Weld the remaining several inner cylinder straight section segments for machining the inner cylinder straight section in sequence according to the established order, and weld them with the inner cylinder straight section segment with the inner cylinder top cover to form an inner cylinder straight section with a closed end;

[0040] Before welding every two inner cylinder straight section segments, rectify the two inner cylinder straight section segments to be welded respectively so that the roundness and straightness of the two inner cylinder straight section segments to be welded meet the preset standards;

[0041] When welding every two inner cylinder straight section segments, the axes of the two inner cylinder straight section segments coincide;

[0042] After welding every two inner cylinder straight section segments, rectify the inner cylinder straight section segments formed into a whole; and set support ribs near the welds of the two inner cylinder straight section segments to make the roundness and straightness of the adjacent two inner cylinder straight section segments formed into a whole after welding meet the preset standards;

[0043] The support ribs are in a "rice" shape, and the center of the "rice" shaped support ribs coincides with the axis of the inner cylinder straight section segment after welding;

[0044] S6. Machining the inner cylinder conical section; Weld several sheet segments for machining the inner cylinder straight section in sequence according to the established order to form the inner cylinder conical section;

[0045] S7. Weld the inner cylinder straight section and the inner cylinder conical section to obtain the inner cylinder main body;

[0046] S8. Remove the components for auxiliary machining on the outer wall of the inner cylinder main body to make the outer wall of the inner cylinder main body flat;

[0047] For the weld inspection of the inner cylinder body, if the weld inspection is qualified, only the inner cylinder pressure test is carried out. If it is unqualified, it is re-inspected after repair until it is qualified, and then the inner cylinder pressure test is carried out;

[0048] If the inner cylinder pressure test is qualified, the subsequent steps are continued; if the inner cylinder pressure test is unqualified, the leakage points are checked and the pressure test is carried out again until the inner cylinder pressure test is qualified;

[0049] S9. Install partitions on the outer wall of the inner cylinder body to guide the flow direction of the heat source medium. The partitions are in a spiral shape that spirals along the entire length of the inner cylinder body;

[0050] S9a. Install several partition segments at the corresponding positions in the 1 / n quadrant of the inner cylinder body;

[0051] S9b. Rotate the inner cylinder body by an angle corresponding to 1 / n quadrant, and repeat step S9a on the rotated inner cylinder body to connect two adjacent partition segments in the radial direction of the inner cylinder body to form a whole;

[0052] S9c. Repeat step S9b to make the partitions installed on the inner cylinder body in a spiral shape that spirals along the entire length of the inner cylinder body;

[0053] S10. Inspect the welds between the partitions and the inner cylinder body. If the weld inspection is qualified, only the inner cylinder pressure test is carried out. If it is unqualified, it is re-inspected after repair until it is qualified, and then the inner cylinder pressure test is carried out;

[0054] If the inner cylinder pressure test is qualified, the subsequent steps are continued; if the inner cylinder pressure test is unqualified, the leakage points are checked and the pressure test is carried out again until the inner cylinder pressure test is qualified;

[0055] S11. Install the accessory pipe components at the corresponding positions on the inner cylinder body;

[0056] S11a. Drill holes according to the position and size of the blowback pipe marked on the inner cylinder conical section in the inner cylinder plane expansion design drawing;

[0057] S11b. Weld the soot blowing nozzle passing through the inner cylinder conical section at the corresponding hole positions on the inner cylinder conical section;

[0058] S11c. Inspect the welds between the soot blowing nozzle and the inner cylinder conical section. If the weld inspection is qualified, only the inner cylinder pressure test is carried out. If it is unqualified, it is re-inspected after repair until it is qualified, and then the inner cylinder pressure test is carried out;

[0059] If the inner cylinder pressure test is qualified, the subsequent steps are continued; if the inner cylinder pressure test is unqualified, the leakage points are checked and the pressure test is carried out again until the inner cylinder pressure test is qualified;

[0060] S11d. Drill holes according to the position and size of the injection pipe marked on the inner cylinder straight section in the inner cylinder plane expansion design drawing;

[0061] S11e. Weld a connecting pipe passing through the straight barrel section of the inner barrel at the corresponding hole positions on the straight barrel section of the inner barrel;

[0062] S11f. Inspect the weld between the connecting pipe and the straight barrel section of the inner barrel. If the weld inspection is qualified, only conduct the pressure test on the inner barrel. If it is unqualified, repair it and reinspect until it is qualified, and then conduct the pressure test on the inner barrel;

[0063] If the pressure test of the inner barrel is qualified, continue with the subsequent steps; if the pressure test of the inner barrel is unqualified, check for leaks and conduct the pressure test again until the pressure test of the inner barrel is qualified;

[0064] S12. Process the straight barrel section of the outer barrel;

[0065] S12a. Wrap one of the cylindrical segments around the tail end of the inner barrel main body equipped with partitions, and spot-weld and fix the cylindrical segment along the longitudinal seam;

[0066] After the cylindrical segment is arranged on the inner barrel main body equipped with partitions, the partitions correspondingly support the cylindrical segment;

[0067] S12b. Weld the outer barrel top cover at the tail end of the cylindrical segment in step S12a;

[0068] When the outer barrel top cover is welded on this cylindrical segment, the axis of the outer barrel top cover coincides with the axis of the inner barrel main body, and the outer barrel top cover closes the top opening of this cylindrical segment;

[0069] S12c. Repeat step S12a, and weld the cylindrical segments one by one on the inner barrel main body with partitions from the tail end of the inner barrel main body with the inner barrel top cover to the head end of the inner barrel main body with the inner barrel conical barrel section;

[0070] Adjacent two cylindrical segments are spot-welded and fixed along the circumferential seam;

[0071] Before the cylindrical segment corresponding to the position of the injection pipe on the straight barrel section of the inner barrel is assembled on the inner barrel main body, mark the position and size of the injection pipe on this cylindrical segment according to the outer barrel plane expansion design drawing and drill holes;

[0072] When the cylindrical segment equipped with the injection pipe is wrapped around the inner barrel main body, the hole positions of this cylindrical segment correspond to the position of the connecting pipe assembled on the inner barrel main body;

[0073] S13. Process the conical barrel section of the outer barrel;

[0074] S13a. Wrap one of the sheet segments around the head end of the inner barrel main body equipped with partitions, and spot-weld and fix the sheet segment along the longitudinal seam;

[0075] After the sheet segment is arranged on the inner barrel main body equipped with partitions, the partitions correspondingly support the sheet segment;

[0076] S13b. Repeat step S13a, starting from the head end of the inner cylinder body with an inner cylinder conical cylinder section and moving towards the tail end of the inner cylinder body with an inner cylinder top cover, and successively weld sheet segments to the inner cylinder body with partitions one by one;

[0077] The adjacent two sheet segments are spot welded and fixed along the circumferential seam;

[0078] Before assembling the sheet segment corresponding to the position of the backflush pipe on the inner cylinder conical cylinder section of the inner cylinder body, mark the position and size of the backflush pipe on this sheet segment according to the corresponding outer cylinder plane expansion design drawing and drill holes;

[0079] When the cylindrical section for assembling the injection pipe is wrapped around the inner cylinder body, the hole positions of this cylindrical section correspond to the position of the soot blowing injection pipe assembled on the inner cylinder body;

[0080] S14. Spot weld and fix the outer cylinder straight cylinder section and the outer cylinder conical cylinder section to obtain the outer cylinder body;

[0081] S15. Weld the welds of the outer cylinder body;

[0082] S15a. Starting from the tail end of the outer cylinder body and moving towards the head end of the outer cylinder body, successively straighten each cylindrical section or each sheet segment, and weld the corresponding longitudinal seam after straightening; so that the roundness, taper and straightness of the corresponding positions of the outer cylinder body meet the preset standards;

[0083] S15b. Starting from the tail end of the outer cylinder body and moving towards the head end of the outer cylinder body, successively straighten each cylindrical section or each sheet segment, and weld the corresponding circumferential seam after straightening; so that the roundness, taper and straightness of the corresponding positions of the outer cylinder body meet the preset standards;

[0084] S15c. Weld the connecting pipe and the soot blowing injection pipe corresponding to and to the outer cylinder body;

[0085] S16. Detect the welds of the outer cylinder body. If the weld detection is qualified, only perform the pressure test on the outer cylinder. If it is unqualified, repair it and recheck it until it is qualified, and then perform the pressure test on the outer cylinder;

[0086] If the pressure test of the outer cylinder is qualified, continue with the subsequent steps; if the pressure test of the outer cylinder is unqualified, check for leaks and perform the pressure test again until the pressure test of the outer cylinder is qualified;

[0087] S17. Drill holes on the inner cylinder body and the outer cylinder body corresponding to the position and size of the accessory pipe type components on the jacketed heat tracing dust collector;

[0088] S18. Weld the corresponding accessory pipe type components on the jacketed heat tracing dust collector;

[0089] S19. Detect the welds of the accessory pipe type components with the inner cylinder body and the outer cylinder body. If the weld detection is qualified, only perform the pressure test on the outer cylinder. If it is unqualified, repair it and recheck it until it is qualified, and then perform the pressure test on the outer cylinder;

[0090] If the outer cylinder passes the pressure test, continue with the subsequent steps; if the outer cylinder fails the pressure test, check for leakage points and conduct the pressure test again until the outer cylinder passes the pressure test.

[0091] S20. Remove the components used for auxiliary processing on the inner wall of the inner cylinder main body. After the inner wall of the inner cylinder main body is made flat;

[0092] Apply anti-corrosion coating to the inner wall of the inner cylinder main body and the outer wall of the outer cylinder main body.

[0093] Furthermore, in step S5d, it includes a rotary jig for supporting adjacent inner cylinder straight section barrel joints to be welded. The rotary jig has rotating rollers that are driven to rotate around their own axes. The axes of the rotating rollers are parallel to the horizontal plane and parallel to the axis of the barrel joint to be welded;

[0094] Before welding adjacent inner cylinder straight section barrel joints, first fix them by spot welding, and then drive them to rotate synchronously by the rotating rollers to weld the circumferential seams of the adjacent inner cylinder straight section barrel joints.

[0095] Furthermore, it also includes a barrel joint protective sleeve with a thickness dimension exceeding that of the inner cylinder straight section barrel joint. The barrel joint protective sleeve wraps around the inner cylinder straight section barrel joint and is fixed to the inner cylinder straight section barrel joint by spot welding;

[0096] The rotating rollers are supported at the positions where the inner cylinder straight section barrel joints have barrel joint protective sleeves. The barrel joint protective sleeves are used to support the contact between the inner cylinder straight section barrel joints and the rotating rollers.

[0097] Furthermore, it also includes a portal scaffold. The portal scaffold has a construction platform higher than the inner cylinder straight section barrel joints to be welded;

[0098] When processing the inner cylinder straight section, adjacent inner cylinder straight section barrel joints to be welded pass through the portal scaffold, and the circumferential seams of the adjacent inner cylinder straight section barrel joints are close to the construction platform.

[0099] Furthermore, in step S6, the inner cylinder conical section is processed on an assembly platform; the assembly platform has an assembly surface parallel to the horizontal plane. Several sheet-like sections for processing the inner cylinder straight section are welded from bottom to top in a predetermined order along a direction perpendicular to the assembly surface to form an inner cylinder conical section with a larger radial dimension at the lower end than at the upper end.

[0100] Furthermore, before welding every two sheet-like sections, respectively align the shapes of the two sheet-like sections to be welded so that the taper and straightness of the two sheet-like sections to be welded meet the preset standards;

[0101] When welding every two sheet-like sections, the axes of the two sheet-like sections coincide;

[0102] After welding every two sections of the sheet-like segments, the inner cylinder conical cylinder section forming an integral body by welding is shaped; and a support backing plate is provided at the weld of two sections of the inner cylinder straight cylinder section to make the taper and straightness of the adjacent two sections of the sheet-like segments forming an integral body after welding meet the preset standards.

[0103] Further, in step S1, it further includes obtaining a plane development design drawing of the partition plate; in step S2, it further includes equally dividing the partition plate along the central axis n of the jacketed heat tracing dust collector, where n≥4; in step S3, lofting and cutting to obtain several partition plate segments for assembling the partition plate.

[0104] Further, a support member is provided between the inner cylinder top cover and the outer cylinder cover.

[0105] Further, before welding the outer cylinder main body of the connecting pipe, the blow-by secondary pipe is arranged at a set position of the inner cylinder main body to communicate with the connecting pipe, and after welding the outer cylinder main body of the connecting pipe, the blow-by main pipe is arranged at a set position of the outer cylinder main body to communicate with the connecting pipe.

[0106] Further, after welding the soot blowing nozzle pipe with the outer cylinder main body, the soot blowing ring pipe connects several corresponding soot blowing nozzle pipes.

[0107] The beneficial effects of the present invention are as follows: A processing method for a jacketed heat tracing dust collector disclosed by the present invention adopts targeted processing methods such as "orbital" assembly, "vertical" assembly, and "rotary welding" according to the characteristics of the dust collector, such as thin walls, large volume, and complex structure; through the processing technology of segmented manufacturing, first segmented assembly, and then overall assembly, the overall accuracy and airtightness of the straight cylinder, conical cylinder, and pipe orifice are ensured; the reasonable segmentation and assembly method makes the straight cylinder, conical cylinder, and pipe orifice easy to install, reducing the cost and installation difficulty; realizing the short-term and high-quality production of a double-layer thin-wall large-volume dust collector. The double-layer thin-wall large-volume conical low-pressure dust collector gathers multiple difficulties in the manufacturing process of the dust collector, such as thin walls, large volume, and high welding quality requirements. The various assembly and welding methods mentioned in the text effectively achieve indicators such as saving construction period, reducing cost, and safety and environmental protection. The method has a clear process, is easy to operate, is easy to implement under factory conditions, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0108] The present invention will be further described below with reference to the drawings and embodiments:

[0109] Figure 1 is a schematic structural diagram of the jacketed heat tracing dust collector of the present invention;

[0110] Figure 2 is a schematic structural diagram of the backwashing pipe of the present invention;

[0111] Figure 3 is a schematic structural diagram of the blowing pipe of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0112] Figure 1 This is a schematic structural diagram of the present invention. As shown in the figure, the processing method for the jacketed heat-traced dust collector in this embodiment includes the following steps:

[0113] S1. Establish a three-dimensional model of the jacketed heat-traced dust collector, perform model simulation steps, and unfold the inner cylinder, outer cylinder, and partition plate to be obtained to obtain the inner cylinder plane unfolding design drawing of the jacketed heat-traced dust collector, the outer cylinder plane unfolding design drawing of the jacketed heat-traced dust collector, and the partition plate plane unfolding design drawing.

[0114] The positions and dimensions of the accessory pipe type components are respectively marked on the inner cylinder plane unfolding design drawing and the outer cylinder plane unfolding design drawing, providing an accurate basis for subsequent processing. For multi-angle different-diameter intersecting pipes such as the blowpipe and the backflush pipe, after surface unfolding, the opening positions and opening dimensions are arranged, which can achieve twice the result with half the effort during assembly and effectively reduce the assembly difficulty and welding difficulty.

[0115] Among them, when designing the partition plate, the position avoiding the accessory pipe type components is spirally arranged from bottom to top in the interlayer between the inner cylinder and the outer cylinder; on the one hand, the partition plate plays a strengthening role in the structure, and on the other hand, it forms a heat flow channel to facilitate the circulation and heat preservation of the heat flow gas.

[0116] The accessory pipe type components include a backflush pipe arranged in the conical section of the dust collector and a blowpipe arranged in the straight section of the dust collector;

[0117] The backflush pipe includes a soot blowing ring pipe arranged around the outside of the conical section of the dust collector and a soot blowing nozzle pipe connecting the soot blowing ring pipe and the inner cavity of the conical section of the dust collector, and the soot blowing nozzle pipe penetrates through the outer cylinder and the inner cylinder of the dust collector;

[0118] The soot blowing ring pipe is coaxial with the conical section of the dust collector, and the soot blowing nozzle pipe includes several roots radially uniformly distributed along the soot blowing ring pipe;

[0119] The blowpipe includes a blowpipe main pipe arranged outside the straight section of the dust collector and a blowpipe auxiliary pipe arranged inside the straight section of the dust collector. There are multiple groups of blowpipe auxiliary pipes arranged in the inner cavity of the straight section of the dust collector, and each group of blowpipe auxiliary pipes is communicated with the blowpipe main pipe through a connecting pipe correspondingly penetrating through the straight section of the dust collector.

[0120] S2. The inner cylinder plane unfolding design drawing includes the inner cylinder conical section, the inner cylinder straight section, and the inner cylinder top cover; the outer cylinder plane unfolding design drawing includes the outer cylinder conical section, the outer cylinder straight section, and the outer cylinder top cover; the inner cylinder conical section, the inner cylinder straight section, the outer cylinder conical section, and the outer cylinder straight section are respectively correspondingly divided into several pieces; it also includes equally dividing the partition plate into n parts along the central axis n of the jacketed heat-traced dust collector, where n≥4.

[0121] It also includes drawing a nesting plan, segmenting according to the project processing technology, steel plate modulus, equipment parameters, etc. For example, if the processing accuracy is high and the dimension control is good, the size of each segment can be appropriately expanded to improve efficiency; conversely, if the processing accuracy is low and the dimension control is poor, the size of each segment is reduced to ensure the processing quality, which will not be elaborated here; fully consider the steel plate splicing specification, the distance between the longitudinal and circumferential seams of the cylinder section, the assembly allowance, and the cutting gap, etc., and minimize the material loss on the premise of meeting the manufacturing specifications and process requirements.

[0122] S3. Lofting and cutting to obtain several pieces of the inner cylinder conical cylinder section, inner cylinder straight cylinder section, outer cylinder conical cylinder section, and outer cylinder straight cylinder section, as well as the inner cylinder top cover and the outer cylinder top cover; several segments of the partition section for forming the partition are also obtained.

[0123] Specifically, after the layout is completed, use the Fastcam nesting tool in the existing technology to convert the cutting program, and then use a plasma cutting machine for cutting; when cutting, accurately number each part, clean the cut, and open a groove according to the process requirements to facilitate subsequent processing steps.

[0124] S4. Cylinder section rolling, rolling several pieces of the split body into sheet sections with a set radian or cylinder sections with a set roundness;

[0125] The split bodies corresponding to the processing of the inner cylinder conical cylinder section and the outer cylinder conical cylinder section are rolled into sheet sections or conical sections with a set radian; the split bodies corresponding to the processing of the inner cylinder straight cylinder section and the outer cylinder straight cylinder section are rolled into cylinder sections with a set roundness;

[0126] It also includes straightening the inner cylinder top cover and the outer cylinder top cover to make the subsequent processing accuracy higher.

[0127] In this step, any roll bending machine in the existing technology that adapts to the corresponding split body is used to roll several pieces of the split body into preset cylindrical, conical curved plate, conical cylinder and other structures. It should be understood that the roll bending machine pre-bends or rolls the split body to be rolled according to the subsequent construction steps, and pre-forms the sheet material of the corresponding block according to the blocks designed in steps S1 - S3, which will not be elaborated here.

[0128] S5. Inner cylinder straight cylinder section processing.

[0129] S5a. Weld several cylindrical segments for the straight barrel section of the processing inner barrel along the longitudinal seams respectively to form several inner barrel straight barrel section joints for the straight barrel section of the processing inner barrel; this step should be welded on a flat assembly platform. When necessary, spot-weld the bottom edge of the cylindrical segment to the assembly platform. Since the dimensions of the cylindrical segments for the straight barrel section of the processing inner barrel are the same, the thin-walled and large-size structure makes it difficult to ensure the roundness. It is necessary to set inner positioning plates and outer positioning plates for clamping and positioning the cylindrical segments on the assembly platform, and set them in multiple groups to ensure that the roundness of several cylindrical segments for the straight barrel section of the processing inner barrel is basically the same, reducing the straightening difficulty in subsequent steps.

[0130] S5b. Weld the inner barrel top cover to one of the inner barrel straight barrel section joints.

[0131] Before welding the inner barrel top cover to the set inner barrel straight barrel section joint, weld a ring-shaped stiffener on the inner wall of the inner barrel straight barrel section joint; the ring-shaped stiffener is set at one end of the inner barrel straight barrel section joint close to the inner barrel top cover; to ensure the welding accuracy of the inner barrel top cover, reduce deformation, and ensure the construction quality.

[0132] When welding the inner barrel top cover to the set inner barrel straight barrel section joint, the axis of the inner barrel straight barrel section joint is perpendicular to the horizontal plane, and the inner barrel top cover closes the top opening of the inner barrel straight barrel section joint; that is, the welding of the inner barrel top cover is vertical welding, which can ensure the welding roundness and improve the welding quality.

[0133] S5c. After welding the inner barrel top cover to the set inner barrel straight barrel section joint, straighten the inner barrel straight barrel section joint welded with the inner barrel top cover so that the roundness and straightness of this section of the inner barrel straight barrel section joint meet the preset standards.

[0134] S5d. Weld the remaining several inner barrel straight barrel section joints for the straight barrel section of the processing inner barrel in sequence according to the established order, and weld them to the inner barrel straight barrel section joint with the inner barrel top cover to form an inner barrel straight barrel section with a closed end.

[0135] Among them, since there are many sections and a long span for the inner barrel straight barrel section, vertical assembly cannot meet the construction requirements; to ensure the construction quality, this solution sets two steel bars arranged in parallel in double rows and erected as barrel section supports, used to arrange several inner barrel straight barrel section joints for the straight barrel section of the processing inner barrel on the barrel section supports in a way that the axis is parallel to the horizontal plane. The interval between the two steel bars is at least 1 meter to ensure the straightness and roundness of the barrel sections.

[0136] Before welding every two inner barrel straight barrel section joints, straighten the two inner barrel straight barrel section joints to be welded respectively so that the roundness and straightness of the two inner barrel straight barrel section joints to be welded meet the preset standards.

[0137] When welding every two inner barrel straight barrel section joints, the axes of the two inner barrel straight barrel section joints coincide.

[0138] After welding every two sections of the straight barrel sections of the inner barrel, shape the straight barrel sections of the inner barrel formed as a whole; and arrange support ribs near the welds of every two sections of the straight barrel sections of the inner barrel, so that the roundness and straightness of the adjacent two sections of the straight barrel sections of the inner barrel formed as a whole after welding meet the preset standards.

[0139] The support ribs are in a "rice" shape, and the center of the "rice"-shaped support ribs coincides with the axis of the straight barrel section of the inner barrel after welding.

[0140] This solution also includes a rotary jig for supporting adjacent straight barrel sections of the inner barrel to be welded. The rotary jig has rotating rollers driven to rotate around its own axis. The axes of the rotating rollers are parallel to the horizontal plane and parallel to the axis of the barrel section to be welded; before welding adjacent straight barrel sections of the inner barrel to be welded, first spot-weld and fix them. This spot-welding step can be completed during the rolling process. After moving to the rotary jig, the adjacent straight barrel sections of the inner barrel to be welded are then driven by the rotating rollers to rotate synchronously to weld the circumferential seams, providing an effective working contact surface.

[0141] Preferably, it also includes a portal scaffold straddling the circumferential seam of adjacent straight barrel sections of the inner barrel. The portal scaffold has a construction platform higher than the straight barrel sections of the inner barrel to be welded, which can form a stable working plane. Generally, the height exceeds within 0.5 m, preferably between 0.2 m and 0.3 m; when processing the straight barrel sections of the inner barrel, adjacent straight barrel sections of the inner barrel to be welded pass through the portal scaffold, and the circumferential seam of the adjacent straight barrel sections of the inner barrel to be welded is close to the construction platform. During the welding process, the rotation speed of the rotating jig matches the welding speed, which can not only meet the requirements of welding process parameters, but also solve the problems of limited working surface and safety hazards of working at height.

[0142] It also includes a barrel section protective sleeve with a thickness exceeding that of the straight barrel section of the inner barrel. The thickness of the barrel section protective sleeve is 10 mm. The barrel section protective sleeve wraps around the straight barrel section of the inner barrel and is fixed to the straight barrel section of the inner barrel by spot welding; the rotating rollers are supported at the position where the straight barrel section of the inner barrel has the barrel section protective sleeve, and the barrel section protective sleeve is used to support the contact between the straight barrel section of the inner barrel and the rotating rollers. When the jig drives the straight barrel section of the inner barrel to rotate, the barrel section protective sleeve is used to protect the extrusion deformation of the barrel body caused by the interaction force between the rotating rollers of the jig and the barrel body during rotation.

[0143] The rotary jig is selected from any one of the existing technologies applicable to this solution, and it should be understood that there are several groups of it, and the use height of a single group is adjustable to meet the use requirements of this solution, which will not be elaborated here; of course, in this solution, the circumferential seam welding of the outer barrel also uses the rotary jig, the portal scaffold and the barrel section protective sleeve, and the implementation method is the same as that of the inner barrel circumferential seam welding, which will not be elaborated here.

[0144] S6. Processing of the conical section of the inner cylinder; several sheet sections for processing the straight section of the inner cylinder are welded in a predetermined order successively to form the conical section of the inner cylinder.

[0145] The conical section of the inner cylinder is processed on the assembly platform; the assembly platform has an assembly surface parallel to the horizontal plane, and several sheet sections for processing the straight section of the inner cylinder are welded from bottom to top in a direction perpendicular to the assembly surface in a predetermined order to form a conical section of the inner cylinder with a larger radial dimension at the lower end than at the upper end. Among them, the bottommost sheet section for processing the straight section of the inner cylinder is first processed into a conical shape, and it is limited on the assembly surface by multiple groups of inner positioning plates and outer positioning plates. After being rechecked and straightened, then taking it as a reference, the sheet sections are assembled upward while ensuring the taper and straightness are accumulated. When each sheet section is assembled, ensure that the straightness of the assembly and the offset of the cylinder sections are within the error range, and then the two sheet sections are spot-welded and fixed through a support backing plate to complete the processing of the conical section of the inner cylinder.

[0146] Before welding every two of the said sheet sections, the two sheet sections to be welded are respectively shaped to make the taper and straightness of the two sheet sections to be welded meet the preset standards;

[0147] When welding every two of the said sheet sections, the axes of the two sheet sections coincide;

[0148] After welding every two of the said sheet sections, the cylinder section of the conical section of the inner cylinder formed as a whole is shaped; and a support backing plate is arranged at the weld of the two cylinder sections of the straight section of the inner cylinder to make the taper and straightness of the adjacent two sheet sections formed as a whole after welding meet the preset standards.

[0149] S7. Weld the straight section of the inner cylinder and the conical section of the inner cylinder to obtain the inner cylinder body; ensure that the axis of the inner cylinder body coincides during welding; among them, double-sided welding is carried out when welding the inner cylinder body, first weld the inner wall, and then carry out the outer wall welding. After each section is assembled and welded and inspected to be qualified, then carry out the overall assembly and welding to improve the construction quality.

[0150] S8. Remove the components for assisting processing on the outer wall of the inner cylinder body, and after grinding the main circumferential seams and longitudinal seams to make the outer wall of the inner cylinder body flat;

[0151] Inspect the welds of the inner cylinder body. If the weld inspection is qualified, only carry out the pressure test of the inner cylinder. If it is unqualified, repair it and recheck it until it is qualified, and then carry out the pressure test of the inner cylinder;

[0152] If the pressure test of the inner cylinder is qualified, continue with the subsequent steps; if the pressure test of the inner cylinder is unqualified, check for leakage points and carry out the pressure test again until the pressure test of the inner cylinder is qualified.

[0153] S9. Install partitions on the outer wall of the inner cylinder body for guiding the flow direction of the heat source medium, and the partitions are in a spiral shape arranged along the entire length of the inner cylinder body in a coiling manner;

[0154] S9a. Set several partition segment sections at corresponding positions within the 1 / n quadrant of the inner cylinder body.

[0155] S9b. Rotate the inner cylinder body by an angle corresponding to 1 / n quadrant. Repeat step S9a on the rotated inner cylinder body so that two radially adjacent partition segment sections on the inner cylinder body are connected to form a whole.

[0156] S9c. Repeat step S9b so that the partitions provided on the inner cylinder body are arranged in a spiral shape that spirals along the entire length of the inner cylinder body.

[0157] To overcome conditions such as a large cylinder diameter and limited working surface, during assembly, the circumference of the cylinder is evenly divided by quadrants. In this solution, n is 8, and each time the partition segment sections within one-eighth of a quadrant are assembled, that is, the partition segment sections are welded using a rotary jig and a portal scaffold. Each time it rotates 45°, the corresponding partition segment sections are arranged in a continuous length within this quadrant to reduce the deformation of the cylinder caused by welding stress; finally, a spiral air flow channel is formed by sequentially connecting the partition segment sections end to end. When adding partition segment sections and encountering positions such as nozzles and manholes, make a circular detour to ensure the smoothness of the channel.

[0158] S10. Inspect the welds between the partitions and the inner cylinder body. If the weld inspection is qualified, only conduct the internal cylinder pressure test. If it is unqualified, repair it and re-inspect until it is qualified, and then conduct the internal cylinder pressure test.

[0159] If the internal cylinder pressure test is qualified, continue with the subsequent steps; if the internal cylinder pressure test is unqualified, check for leaks and conduct the pressure test again until the internal cylinder pressure test is qualified.

[0160] S11. Set the accessory pipe - type components at corresponding positions on the inner cylinder body; pre - process the complex back - blowing pipe and the through - hole part of the dust collector, as well as the injection pipe and the through - hole part of the dust collector, and then process the outer cylinder. Make the assembly of the outer cylinder directly wrap around the inner cylinder, and pre - open the corresponding through - hole positions on the outer cylinder, so as to ensure the final finished product accuracy, have a better finished product quality, and overcome the problems of difficult positioning, poor welding quality, difficult guarantee of finished product dimensions, and high rejection rate when opening complex through - holes after the overall assembly is completed.

[0161] S11a. Drill holes according to the positions and dimensions of the back - blowing pipes marked on the inner cylinder conical section in the inner cylinder plane expansion design drawing.

[0162] S11b. Weld the soot - blowing nozzles passing through the inner cylinder conical section at the corresponding hole positions on the inner cylinder conical section.

[0163] S11c. Inspect the welds between the soot - blowing nozzles and the inner cylinder conical section. If the weld inspection is qualified, only conduct the internal cylinder pressure test. If it is unqualified, repair it and re - inspect until it is qualified, and then conduct the internal cylinder pressure test.

[0164] If the internal cylinder passes the pressure test, continue with the subsequent steps; if the internal cylinder fails the pressure test, conduct leak point inspection and then retest until the internal cylinder passes the pressure test;

[0165] S11d. Drill holes according to the positions and dimensions of the injection pipes marked on the straight section of the internal cylinder in the flat expansion design drawing of the internal cylinder;

[0166] S11e. Weld a connecting pipe passing through the straight section of the internal cylinder at the corresponding hole positions on the straight section of the internal cylinder;

[0167] S11f. Inspect the weld between the connecting pipe and the straight section of the internal cylinder. If the weld inspection is qualified, only conduct the pressure test on the internal cylinder. If it is unqualified, repair it and then reinspect until it is qualified, and then conduct the pressure test on the internal cylinder;

[0168] If the internal cylinder passes the pressure test, continue with the subsequent steps; if the internal cylinder fails the pressure test, conduct leak point inspection and then retest until the internal cylinder passes the pressure test;

[0169] This step directly inspects the weld and conducts the pressure test on the internal cylinder, improving the construction quality, having better welding quality, and there is no problem of difficult leak point inspection.

[0170] S12. Processing of the straight section of the outer cylinder;

[0171] S12a. Wrap and buckle one of the cylindrical segments for processing the straight section of the outer cylinder at the tail end of the main body of the internal cylinder equipped with partitions, and spot-weld and fix one cylindrical segment along the longitudinal seam;

[0172] After the cylindrical segment is arranged on the main body of the internal cylinder equipped with partitions, the partitions correspondingly support the cylindrical segment; in this step, a portal scaffold is used and with the help of a chain block or other tensioning equipment, the cylindrical segment for processing the straight section of the outer cylinder is closely attached and wrapped and buckled on the partitions outside the internal cylinder, and then one cylindrical segment is spot-welded and fixed along the longitudinal seam.

[0173] The construction method of wrapping and buckling the outer cylinder can complete the processing of the overall structure at lower cost and with higher quality, solve the problems of difficult construction of complex through openings and difficult control of the interlayer gap, have higher construction efficiency, and better finished product quality.

[0174] S12b. Weld the outer cylinder top cover at the tail end of the cylindrical segment in step S12a; there is a support between the internal cylinder top cover and the outer cylinder top cover. In this scheme, the support is a reticulated lattice structure arranged in a rectangular frame and staggered between the internal cylinder top cover and the outer cylinder top cover to ensure the setting strength between the two; when the outer cylinder top cover is welded on this cylindrical segment, the axis of the outer cylinder top cover coincides with the axis of the main body of the internal cylinder, and the outer cylinder top cover closes the top opening of this cylindrical segment; that is, the outer cylinder top cover also adopts the vertical welding method to ensure the welding roundness and improve the processing quality.

[0175] S12c. Repeat step S12a. Starting from the tail end of the inner cylinder main body with the inner cylinder top cover, towards the head end of the inner cylinder main body with the inner cylinder conical cylinder section, successively weld tubular sections onto the inner cylinder main body with partitions one by one.

[0176] Adjacent two tubular sections are spot welded and fixed along the circumferential seam; this step utilizes a rotary jig for assistance, corresponding to and equipped with a cylinder section protective sleeve to improve construction quality and efficiency;

[0177] Before assembling the tubular section corresponding to the position of the injection pipe on the straight section of the inner cylinder onto the inner cylinder main body, on this tubular section, mark and drill holes for the position and size of the injection pipe according to the outer cylinder plane expansion design drawing;

[0178] When the tubular section equipped with the injection pipe is buckled onto the inner cylinder main body, the hole positions of this tubular section correspond to the position of the connecting pipe assembled on the inner cylinder main body.

[0179] S13. Processing of the outer cylinder conical cylinder section;

[0180] S13a. Wrap one sheet section around the head end of the inner cylinder main body equipped with partitions, and spot weld and fix one sheet section along the longitudinal seam; after the sheet section is set on the inner cylinder main body equipped with partitions, the partition correspondingly supports the sheet section; this sheet section correspondingly forms a conical shape to form a positioning reference, and gradually weld subsequent sheet sections to improve construction quality.

[0181] S13b. Repeat step S13a. Starting from the head end of the inner cylinder main body with the inner cylinder conical cylinder section, towards the tail end of the inner cylinder main body with the inner cylinder top cover, successively weld sheet sections onto the inner cylinder main body with partitions one by one;

[0182] Adjacent two sheet sections are spot welded and fixed along the circumferential seam;

[0183] Before assembling the sheet section corresponding to the position of the backwashing pipe on the conical section of the inner cylinder onto the inner cylinder main body, on this sheet section, mark and drill holes for the position and size of the backwashing pipe according to the outer cylinder plane expansion design drawing;

[0184] When the tubular section equipped with the injection pipe is buckled onto the inner cylinder main body, the hole positions of this tubular section correspond to the position of the soot blowing injection pipe assembled on the inner cylinder main body.

[0185] S14. Spot weld and fix the outer cylinder straight section and the outer cylinder conical cylinder section to obtain the outer cylinder main body.

[0186] S15. Welding of the outer cylinder main body welds.

[0187] S15a. Starting from the end of the outer cylinder main body towards the head end of the outer cylinder main body, successively straighten each tubular section or each sheet section, and weld the corresponding longitudinal seam after straightening; so that the roundness, taper, and straightness of the corresponding positions of the outer cylinder main body meet the preset standards.

[0188] S15b. Starting from the end of the outer cylinder main body towards the head end of the outer cylinder main body, shape each cylindrical segment or each sheet segment one by one, and weld the corresponding circumferential seams after shaping; so that the roundness, taper and straightness of the corresponding positions of the outer cylinder main body meet the preset standards; the circumferential seam welding is assisted by a rotary jig, and a cylinder section protective sleeve is correspondingly equipped to improve the construction quality and efficiency.

[0189] S15c. Weld the connecting pipe and the soot blowing nozzle corresponding to the outer cylinder main body.

[0190] After the soot blowing nozzle is welded to the outer cylinder main body, connect several corresponding soot blowing nozzles with a soot blowing ring pipe.

[0191] Before the connecting pipe is welded to the outer cylinder main body, set the blowing sub-pipe at the set position of the inner cylinder main body to communicate with the connecting pipe. After the connecting pipe is welded to the outer cylinder main body, set the blowing main pipe at the set position of the outer cylinder main body to communicate with the connecting pipe.

[0192] When welding the outer cylinder main body, use the welding method of single-sided welding and double-sided forming.

[0193] S16. Detect the welds of the outer cylinder main body. If the weld detection is qualified, only perform the pressure test on the outer cylinder. If it is unqualified, repair it and recheck it until it is qualified, and then perform the pressure test on the outer cylinder.

[0194] If the pressure test of the outer cylinder is qualified, continue with the subsequent steps; if the pressure test of the outer cylinder is unqualified, check for leaks and perform the pressure test again until the pressure test of the outer cylinder is qualified.

[0195] S17. Drill holes in the inner cylinder main body and the outer cylinder main body corresponding to the positions and sizes of the accessory pipe components on the jacketed heat tracing dust collector.

[0196] S18. Weld the corresponding accessory pipe components on the jacketed heat tracing dust collector.

[0197] S19. Detect the welds of the accessory pipe components with the inner cylinder main body and the outer cylinder main body. If the weld detection is qualified, only perform the pressure test on the outer cylinder. If it is unqualified, repair it and recheck it until it is qualified, and then perform the pressure test on the outer cylinder.

[0198] If the pressure test of the outer cylinder is qualified, continue with the subsequent steps; if the pressure test of the outer cylinder is unqualified, check for leaks and perform the pressure test again until the pressure test of the outer cylinder is qualified.

[0199] S20. Remove the components for assisting processing on the inner wall of the inner cylinder main body, such as support ribs, and the components for assisting processing on the outer wall of the outer cylinder main body, such as the cylinder section protective sleeve. After the inner wall of the inner cylinder main body and the outer wall of the outer cylinder main body are made flat; apply anti-corrosion coating to the inner wall of the inner cylinder main body and the outer wall of the outer cylinder main body.

[0200] According to the characteristics of the dust collector, such as thin wall, large volume, and complex structure, this solution adopts targeted processing methods such as "orbital" assembly, "vertical" assembly, and "rotational welding"; through the processing technology of manufacturing in sections, first assembling in segments, and then assembling as a whole, the overall accuracy and airtightness of the straight cylinder, conical cylinder, and pipe orifice are ensured; the reasonable segmentation and assembly method make the straight cylinder, conical cylinder, and pipe orifice easy to install, reducing the cost and installation difficulty; realizing the short-term and high-quality production of the double-layer thin-wall and large-volume dust collector. The double-layer thin-wall and large-volume conical low-pressure dust collector aggregates multiple difficulties in the manufacturing process of the dust collector, such as thin wall, large volume, and high welding quality requirements. The various assembly and welding methods mentioned in the text effectively achieve indicators such as saving the construction period, reducing costs, and being safe and environmentally friendly. The method has a clear process, is easy to operate, is easy to implement under factory conditions, and improves production efficiency.

[0201] 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 preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A processing method for a jacketed heat-traced dust collector, characterized in that: It includes the following steps: S1. Obtain the inner cylinder plane development design drawing of the jacketed heat tracing dust collector and the outer cylinder plane development design drawing of the jacketed heat tracing dust collector; The positions and dimensions of the accessory pipe components are respectively marked on the inner cylinder plane development design drawing and the outer cylinder plane development design drawing; The accessory pipe components include a backflush pipe arranged in the conical section of the dust collector and a blowpipe arranged in the straight section of the dust collector; The backflush pipe includes a soot blowing ring pipe arranged around the outside of the conical section of the dust collector and a soot blowing nozzle pipe that connects the soot blowing ring pipe and the inner cavity of the conical section of the dust collector; The soot blowing ring pipe is coaxial with the conical section of the dust collector, and the soot blowing nozzle pipe includes a plurality of pipes evenly distributed radially along the soot blowing ring pipe; The blowpipe includes a blowpipe main pipe arranged outside the straight section of the dust collector and a blowpipe sub-pipe arranged inside the straight section of the dust collector. A plurality of groups of blowpipe sub-pipes are arranged in the inner cavity of the straight section of the dust collector, and each group of blowpipe sub-pipes is connected to the blowpipe main pipe through a connecting pipe correspondingly passing through the straight section of the dust collector; S2. The inner cylinder plane development design drawing includes an inner cylinder conical section, an inner cylinder straight section, and an inner cylinder top cover; The outer cylinder plane development design drawing includes an outer cylinder conical section, an outer cylinder straight section, and an outer cylinder top cover; The inner cylinder conical section, the inner cylinder straight section, the outer cylinder conical section, and the outer cylinder straight section are respectively divided into several pieces; S3. Lofting and cutting to obtain several pieces for processing the inner cylinder conical section, the inner cylinder straight section, the outer cylinder conical section, and the outer cylinder straight section, as well as the inner cylinder top cover and the outer cylinder top cover; S4. Cylinder section rolling, rolling several pieces correspondingly into sheet-like segments with a set radian or cylindrical segments with a set roundness; The pieces corresponding to the inner cylinder conical section and the outer cylinder conical section are rolled into sheet-like segments with a set radian; the pieces corresponding to the inner cylinder straight section and the outer cylinder straight section are rolled into cylindrical segments with a set roundness; S5. Processing of the inner cylinder straight section; S5a. Weld the longitudinal seams of several cylindrical segments for processing the inner cylinder straight section respectively to form several inner cylinder straight section cylinder segments for processing the inner cylinder straight section; S5b. Weld the inner cylinder top cover on one of the inner cylinder straight section cylinder segments; Before welding the inner cylinder straight section cylinder segment and the inner cylinder top cover, weld a circular reinforcing rib on the inner wall of the inner cylinder straight section cylinder segment; The circular reinforcing rib is arranged at one end of the inner cylinder straight section cylinder segment close to the inner cylinder top cover; When welding the inner cylinder top cover on the set inner cylinder straight section cylinder segment, the axis of the inner cylinder straight section cylinder segment is perpendicular to the horizontal plane, and the inner cylinder top cover closes the top opening of the inner cylinder straight section cylinder segment; S5c. Shape correction of the inner cylinder straight section cylinder segment welded with the inner cylinder top cover so that the roundness and straightness of this section of the inner cylinder straight section cylinder segment meet the preset standards; S5d. Weld the remaining several inner cylinder straight section cylinder segments for processing the inner cylinder straight section in sequence according to the established order and weld them with the inner cylinder straight section cylinder segment with the inner cylinder top cover to form an inner cylinder straight section with a closed end; Before welding every two inner cylinder straight section cylinder segments, shape correction is respectively carried out on the two inner cylinder straight section cylinder segments to be welded so that the roundness and straightness of the two inner cylinder straight section cylinder segments to be welded meet the preset standards; When welding every two inner cylinder straight section cylinder segments, the axes of the two inner cylinder straight section cylinder segments coincide; After every two cylindrical straight-section barrel joints are welded, the formed integral cylindrical straight-section barrel joints are shaped; and support ribs are arranged near the welds of the two cylindrical straight-section barrel joints to make the roundness and straightness of the adjacent two formed integral cylindrical straight-section barrel joints after welding meet the preset standards; The support ribs are in a "rice" shape, and the center of the "rice" - shaped support ribs coincides with the axis of the welded cylindrical straight-section barrel joints; S6. Processing the conical barrel section of the inner barrel; successively welding several sheet sections for processing the cylindrical straight-section of the inner barrel in a predetermined order to form the conical barrel section of the inner barrel; S7. Welding the cylindrical straight-section of the inner barrel and the conical barrel section of the inner barrel to obtain the inner barrel body; S8. Removing the components for assisting processing on the outer wall of the inner barrel body to make the outer wall of the inner barrel body flat; Conducting weld inspection on the inner barrel body. If the weld inspection is qualified, only the inner barrel pressure test is carried out. If it is unqualified, it is repaired and re - inspected until it is qualified, and then the inner barrel pressure test is carried out; If the inner barrel pressure test is qualified, continue with the subsequent steps; if the inner barrel pressure test is unqualified, check for leakage points and conduct the pressure test again until the inner barrel pressure test is qualified; S9. Arranging partitions for guiding the flow direction of the heat source medium on the outer wall of the inner barrel body, and the partitions are in a spiral shape arranged along the entire length of the inner barrel body; S9a. Arranging several partition sections at corresponding positions in the 1 / n quadrant of the inner barrel body; S9b. Rotating the inner barrel body by an angle corresponding to 1 / n quadrant, and repeating step S9a on the rotated inner barrel body to connect two adjacent partition sections in the radial direction of the inner barrel body to form an integral body; S9c. Repeating step S9b to make the partitions arranged on the inner barrel body in a spiral shape arranged along the entire length of the inner barrel body; S10. Conducting weld inspection between the partitions and the inner barrel body. If the weld inspection is qualified, only the inner barrel pressure test is carried out. If it is unqualified, it is repaired and re - inspected until it is qualified, and then the inner barrel pressure test is carried out; If the inner barrel pressure test is qualified, continue with the subsequent steps; if the inner barrel pressure test is unqualified, check for leakage points and conduct the pressure test again until the inner barrel pressure test is qualified; S11. Arranging the accessory pipe - type components at corresponding positions on the inner barrel body; S11a. Drilling holes according to the position and size of the back - blow pipe marked on the conical barrel section of the inner barrel in the inner barrel plane expansion design drawing; S11b. Welding a soot - blowing spray pipe passing through the conical barrel section of the inner barrel at the corresponding hole positions on the conical barrel section of the inner barrel; S11c. Conducting weld inspection between the soot - blowing spray pipe and the conical barrel section of the inner barrel. If the weld inspection is qualified, only the inner barrel pressure test is carried out. If it is unqualified, it is repaired and re - inspected until it is qualified, and then the inner barrel pressure test is carried out; If the inner barrel pressure test is qualified, continue with the subsequent steps; if the inner barrel pressure test is unqualified, check for leakage points and conduct the pressure test again until the inner barrel pressure test is qualified; S11d. Drilling holes according to the position and size of the spray pipe marked on the cylindrical straight - section of the inner barrel in the inner barrel plane expansion design drawing; S11e. Welding a connecting pipe passing through the cylindrical straight - section of the inner barrel at the corresponding hole positions on the cylindrical straight - section of the inner barrel; S11f. Conducting weld inspection between the connecting pipe and the cylindrical straight - section of the inner barrel. If the weld inspection is qualified, only the inner barrel pressure test is carried out. If it is unqualified, it is repaired and re - inspected until it is qualified, and then the inner barrel pressure test is carried out; If the inner barrel pressure test is qualified, continue with the subsequent steps; if the inner barrel pressure test is unqualified, check for leakage points and conduct the pressure test again until the inner barrel pressure test is qualified; S12. Machining of the straight cylinder section of the outer cylinder; S12a. Wrap and buckle one of the cylindrical segments around the tail end of the inner cylinder body equipped with partitions, and spot-weld and fix the cylindrical segment along the longitudinal seam; After the cylindrical segment is set on the inner cylinder body equipped with partitions, the partitions correspondingly support the cylindrical segment; S12b. Weld the outer cylinder top cover at the tail end of the cylindrical segment in step S12a; When the outer cylinder top cover is welded on this cylindrical segment, the axis of the outer cylinder top cover coincides with the axis of the inner cylinder body, and the outer cylinder top cover closes the top opening of this cylindrical segment; S12c. Repeat step S12a, starting from the tail end of the inner cylinder body with the inner cylinder top cover towards the head end of the inner cylinder body with the inner cylinder conical cylinder section, and successively weld cylindrical segments on the inner cylinder body equipped with partitions; Adjacent two cylindrical segments are spot-welded and fixed along the circumferential seam; Before assembling the cylindrical segment corresponding to the position of the blowpipe on the straight cylinder section of the inner cylinder on the inner cylinder body, mark the position and size of the blowpipe on this cylindrical segment according to the outer cylinder plane development design drawing and drill holes; When the cylindrical segment equipped with the blowpipe is wrapped and buckled on the inner cylinder body, the hole positions of this cylindrical segment correspond to the position of the connecting pipe assembled on the inner cylinder body; S13. Machining of the conical cylinder section of the outer cylinder; S13a. Wrap and buckle one of the sheet segments around the head end of the inner cylinder body equipped with partitions, and spot-weld and fix the sheet segment along the longitudinal seam; After the sheet segment is set on the inner cylinder body equipped with partitions, the partitions correspondingly support the sheet segment; S13b. Repeat step S13a, starting from the head end of the inner cylinder body with the inner cylinder conical cylinder section towards the tail end of the inner cylinder body with the inner cylinder top cover, and successively weld sheet segments on the inner cylinder body equipped with partitions; Adjacent two sheet segments are spot-welded and fixed along the circumferential seam; Before assembling the sheet segment corresponding to the position of the back blowpipe on the conical cylinder section of the inner cylinder on the inner cylinder body, mark the position and size of the back blowpipe on this sheet segment according to the outer cylinder plane development design drawing and drill holes; When the cylindrical segment equipped with the blowpipe is wrapped and buckled on the inner cylinder body, the hole positions of this cylindrical segment correspond to the position of the soot blowing blowpipe assembled on the inner cylinder body; S14. Spot-weld and fix the straight cylinder section and the conical cylinder section of the outer cylinder to obtain the outer cylinder body; S15. Welding of the welds of the outer cylinder body; S15a. Starting from the end of the outer cylinder body towards the head end of the outer cylinder body, shape each cylindrical segment or each sheet segment one by one, and weld the corresponding longitudinal seam after shaping; so that the roundness, taper and straightness of the corresponding positions of the outer cylinder body meet the preset standards; S15b. Starting from the end of the outer cylinder body towards the head end of the outer cylinder body, shape each cylindrical segment or each sheet segment one by one, and weld the corresponding circumferential seam after shaping; so that the roundness, taper and straightness of the corresponding positions of the outer cylinder body meet the preset standards; S15c. Weld the connecting pipe and the soot blowing blowpipe correspondingly to the outer cylinder body; S16. Detect the welds of the outer cylinder body. If the weld detection is qualified, only conduct the pressure test of the outer cylinder. If it is unqualified, repair it and recheck it until it is qualified, and then conduct the pressure test of the outer cylinder; If the pressure test of the outer cylinder is qualified, continue with the subsequent steps; if the pressure test of the outer cylinder is unqualified, check for leaks and conduct the pressure test again until the pressure test of the outer cylinder is qualified; S17. Open holes on the inner cylinder main body and the outer cylinder main body corresponding to the position and size of the accessory pipe - type components on the jacket - type heat - tracing dust collector. S18. Weld the corresponding accessory pipe - type components on the jacket - type heat - tracing dust collector. S19. Detect the welds of the accessory pipe - type components with the inner cylinder main body and the outer cylinder main body. If the weld detection is qualified, only conduct the pressure test on the outer cylinder. If it is unqualified, repair it and re - inspect until it is qualified, then conduct the pressure test on the outer cylinder. If the pressure test of the outer cylinder is qualified, continue with the subsequent steps. If the pressure test of the outer cylinder is unqualified, check for leakage points and conduct the pressure test again until the pressure test of the outer cylinder is qualified. S20. Remove the components used for auxiliary processing on the inner wall of the inner cylinder main body to make the inner wall of the inner cylinder main body flat. Apply anti - corrosion coating on the inner wall of the inner cylinder main body and the outer wall of the outer cylinder main body.

2. The processing method for the jacketed heat-traced dust collector according to claim 1, wherein: In step S5d, it includes a rotary jig for supporting adjacent inner cylinder straight - section barrel joints to be welded. The rotary jig has rotating rollers that are driven to rotate around their own axes. The axes of the rotating rollers are parallel to the horizontal plane and parallel to the axes of the barrel joints to be welded. Before welding adjacent inner cylinder straight - section barrel joints, first spot - weld them in place, and then drive them to rotate synchronously by the rotating rollers to weld the circumferential seams of the adjacent inner cylinder straight - section barrel joints.

3. The processing method for the jacketed heat tracing dust collector according to claim 2, wherein: It also includes a barrel joint protective sleeve with a thickness exceeding that of the inner cylinder straight - section barrel joint. The barrel joint protective sleeve wraps around the inner cylinder straight - section barrel joint and is fixed to the inner cylinder straight - section barrel joint by spot - welding. The rotating rollers support the inner cylinder straight - section barrel joint at the position where it has the barrel joint protective sleeve. The barrel joint protective sleeve is used to support the contact between the inner cylinder straight - section barrel joint and the rotating rollers.

4. The processing method for the jacketed heat tracing dust collector according to claim 2, characterized in that: It also includes a portal scaffold, which has a construction platform higher than the inner cylinder straight - section barrel joints to be welded. When processing the inner cylinder straight - section, adjacent inner cylinder straight - section barrel joints pass through the portal scaffold, and the circumferential seams of the adjacent inner cylinder straight - section barrel joints are close to the construction platform.

5. The processing method for the jacketed heat-traced dust collector according to claim 3, wherein: In step S6, the inner cylinder conical section is processed on the assembly platform. The assembly platform has an assembly surface parallel to the horizontal plane. Several sheet - like sections for processing the inner cylinder straight - section are welded from bottom to top in a predetermined order along the direction perpendicular to the assembly surface to form an inner cylinder conical section with a larger radial dimension at the lower end than at the upper end.

6. The processing method for the jacketed heat-traced dust collector according to claim 5, wherein: Before welding every two sheet - like sections, respectively shape - correct the two sheet - like sections to be welded so that the taper and straightness of the two sheet - like sections to be welded meet the preset standards. When welding every two sheet - like sections, the axes of the two sheet - like sections coincide. After welding every two sheet - like sections, shape - correct the inner cylinder conical section formed as a whole; and set support pads at the welds of the two inner cylinder straight - section barrel joints to make the taper and straightness of the adjacent two sheet - like sections formed as a whole after welding meet the preset standards.

7. The processing method for the jacketed heat-traced dust collector according to claim 6, wherein: In step S1, it also includes obtaining a plane development design drawing of the partition plate. In step S2, it also includes equally dividing the partition plate by the central axis n of the jacket - type heat - tracing dust collector, where n≥4. In step S3, lay out and cut the material to obtain several partition plate sections for assembling the partition plate.

8. The processing method for the jacketed heat tracing dust collector according to claim 1, characterized in that: There is a support between the inner cylinder top cover and the outer cylinder cover.

9. The processing method for the jacketed heat-traced dust collector according to claim 1, characterized in that: Before the outer cylinder body is welded, the injection sub-pipe is arranged at a set position of the inner cylinder body to communicate with the connecting pipe. After the outer cylinder body is welded, the injection main pipe is arranged at a set position of the outer cylinder body to communicate with the connecting pipe.

10. The processing method for the jacketed heat-traced dust collector according to claim 1, characterized in that: After the soot blowing nozzle is welded to the outer cylinder body, the soot blowing ring pipe connects a corresponding number of soot blowing nozzles.

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