Device for reducing ash accumulation on tail heating surface of flue type waste heat boiler in copper smelting industry
By installing slag-condensing flat steel at the tail end of the flue-type waste heat boiler, the problems of coking and ash accumulation on the tail heating surface are solved, achieving more efficient heat exchange and longer equipment life, while reducing production costs and maintenance requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-03
- Publication Date
- 2026-04-10
AI Technical Summary
In the copper smelting industry, the tail heating surface of flue-type waste heat boilers is prone to coking, ash accumulation, and tube rupture, resulting in reduced heat exchange efficiency and frequent maintenance. Existing soot blowers and rapping devices are ineffective, affecting production continuity.
Multiple sets of slag-collecting flat steel are installed at the tail end of the waste heat boiler. The slag-collecting flat steel is arranged at a 45° angle with the flue gas direction and is made of materials such as 06Cr18Ni11Ti. It intercepts flue dust and reduces coking and corrosion. The flue dust is discharged through the lower ash collection device.
It effectively alleviates coking and ash accumulation, reduces the risk of tube rupture, extends boiler service life, reduces production costs and maintenance frequency, and improves heat exchange efficiency and production stability.
Smart Images
Figure CN224108654U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to copper smelting waste heat recovery technical field, concretely relates to a kind of copper smelting industry flue type waste heat boiler reduces tail heating area ash device. BACKGROUND
[0002] Now copper smelting industry is usually adopted flue type waste heat boiler on waste heat recovery, due to initial flue dust content is larger, raw material mostly adopts imported copper concentrate flue dust content is not fixed, and contains a large amount of sulfur element. Flue gas passes through waste heat boiler hearth heating surface and enters tail condensate tube screen and convection tube bundle heating surface, this heating surface is serpentine pipe structure, so a large amount of ash will be caused, high-temperature flue gas is heat exchanged after passing through hearth heating surface, and the flue temperature is about 500-550 ℃, at this temperature, the dust in flue gas is in molten state and has certain viscosity, after flue gas contacts condensate tube screen heating surface, dust will be adhered to heat exchange tube bundle to form coking, and a large amount of SO2 in flue gas will cause serious corrosion phenomenon of condensate heating surface after coking, leading to condensate tube screen tube burst, and remaining flue gas will also cause a large amount of ash and scouring tube burst phenomenon after passing through condensate tube screen. Therefore, in copper smelting industry, tail serpentine tube heating surface exists coking, heat exchange efficiency is reduced, and tube screen tube burst is serious. For this phenomenon, high-power shock blower or high-frequency vibration device is usually used to forcibly vibrate, but the effect is not ideal, and frequent shutdown is required for cleaning coking and ash and repairing tube burst. However, frequent shutdown for repair leads to inability to realize continuous and stable production conditions.
[0003] Many boiler manufacturers adopt multiple tube encirclement to reduce the distance between tube screen and bend pipe as much as possible and reserve convection tube bundle heating surface position to prevent flue gas temperature from being too high after heat exchange efficiency is reduced to affect subsequent process when facing this problem. However, reducing the distance between tube screen and bend pipe can reduce ash phenomenon, but it increases repair difficulty. UTILITY MODEL CONTENT
[0004] The utility model is just for the above-mentioned problem, makes up for the deficiency of prior art, and provides a kind of copper smelting industry flue type waste heat boiler reduces tail heating area ash device;The utility model can effectively alleviate the frequency of occurrence of related problems, improve the service life of waste heat boiler, and improve continuous and stable production.
[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions.
[0006] The utility model provides a copper smelting industry flue type waste heat boiler reduces tail heating area ash device, including a plurality of groups of condensate slag flat steel, its characterized in being that every group condensate slag flat steel all includes two condensate slag flat steels, every group condensate slag flat steel all is arranged on the first tube of condensate slag tube screen or every group serpentine tube row of the convection tube bundle smoke side, and two condensate slag flat steels of every group are arranged with the 45 angle of smoke gas direction and each other 90.
[0007] Further, the size of the condensate slag flat steel is 40mm in length and 5mm in thickness.
[0008] Further, the material of the condensate slag flat steel is 06Cr18Ni11Ti.
[0009] Further, the material of the condensate slag flat steel is 304H.
[0010] Further, the material of the condensate slag flat steel is 304 or 304L or 316L.
[0011] The utility model has the advantages that.
[0012] The utility model can effectively alleviate the coking and ash deposition phenomenon of the tail heating surface of the waste heat boiler; reduce the occurrence of SO2 corrosion and pipe explosion phenomenon caused by flue gas scouring; reduce the use frequency of shock soot blower, thereby reducing production cost and the number of shutdown maintenance; further, the service life of the boiler can be prolonged, the cost problem of increasing new heating surface to reduce the flue gas temperature due to the reduction of the heat exchange effect of the tail heating surface is delayed, the smoke dust concentration at the flue gas outlet is reduced, and the operation condition and cost of the external dust removal device are alleviated. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and do not limit the utility model.
[0014] Figure 1 Is the left view structure schematic diagram of the utility model installed at the tail of the waste heat boiler.
[0015] Figure 2 Is the overhead structure schematic diagram of the utility model installed at the tail of the waste heat boiler.
[0016] Figure 3 Is the structure schematic diagram of the installation place of the utility model.
[0017] Marked in the figure: 1 is condensate slag flat steel, 2 is condensate slag tube screen, 3 is the first group of convection tube bundle, 4 is the second group of convection tube bundle. DETAILED DESCRIPTION
[0018] The embodiment provided by the present application provides a device for reducing fouling of tail heating surface of a flue-type waste heat boiler in a copper smelting industry, which comprises a plurality of groups of condensate flat steel 1, each group of condensate flat steel 1 comprising two condensate flat steels 1.
[0019] Each group of condensate flat steel 1 is arranged on the first tube on the flue gas inlet side of each group of serpentine tube banks of the condensate tube panel 2 or the convection tube bank, and the two condensate flat steels 1 of each group are arranged at an angle of 45° with the flue gas direction (the direction indicated by A) and are 90° to each other.
[0020] In order to meet the requirements of the serpentine tube heating surface, the upper part of the condensate flat steel 1 is parallel to the highest point of the flue gas flow, and the lower part is above the weld of the serpentine tube bend. The size of each condensate flat steel 1 is set to a length of 40 mm and a thickness of 5 mm.
[0021] When the flue gas passes through the serpentine tube heating surface, it first washes the condensate flat steel 1, which can effectively intercept the dust in the washing flue gas. The dust will stick to the condensate flat steel 1, and the coking range will be within the 45° angle, and it cannot coke to the back side of the tube.
[0022] Due to the small spacing of the rear tube bank, the flue gas washing area is small, and the condensate flat steel 1 is used to reduce the flue gas washing of the first tube. After the condensate flat steel 1 is installed, the dust in the flue gas can be blocked from sticking to the tube bank to reduce coking and corrosion and explosion of the tube, and the blocked dust can be left in the boiler and discharged outside the furnace through the lower ash removal device.
[0023] Similarly, the condensate flat steel 1 added to the first tube of the convection heating surface of the first group of convection tube banks 3 and the second group of convection tube banks 4 in the rear part can also reduce fouling and flue gas washing wear.
[0024] In the selection of the material of the condensate flat steel 1, when the temperature of the flue gas is about 550°C and contains a large amount of SO2, the condensate flat steel 1 is made of 06Cr18Ni11Ti material, and its heat resistance and corrosion resistance can meet the long-term use requirements.
[0025] If there is no corrosive component in the flue gas or the requirement is not high, the material of the condensate flat steel 1 can be changed, such as 304H.
[0026] If the temperature of the flue gas is 400°C or lower, the material of the condensate flat steel 1 can be changed, such as 304, 304L, 316L, etc.
[0027] It can be understood that the above specific description of the utility model is only used for illustrating the utility model and is not limited to the technical scheme described in the utility model embodiment, and the person skilled in the art should understand that the utility model can still be modified or equivalently replaced to achieve the same technical effect, as long as the use needs are met, it is within the protection scope of the utility model.
Claims
1. A device for reducing the fouling of the tail heating surfaces of a flue waste heat boiler in the copper smelting industry, comprising a plurality of sets of condensate slabs (1), characterised in that, Each group of the slag condensing flat steel (1) comprises two slag condensing flat steels (1), each group of the slag condensing flat steel (1) is arranged on the first tube on the smoke-approaching side of each group of serpentine tube rows of the slag condensing tube panel (2) or each convection tube bundle, and the two slag condensing flat steels (1) of each group are arranged at an angle of 45° with the flue gas direction and are 90° with each other.
2. A device for reducing the fouling of the tail heating surfaces of a flue waste heat boiler used in the copper smelting industry according to claim 1, characterized in that, The size of the slag condensing flat steel (1) is 40 mm in length and 5 mm in thickness.
3. A device for reducing the fouling of the tail heating surfaces of a flue waste heat boiler used in the copper smelting industry according to claim 1, characterized in that, The material of the slag condensing flat steel (1) is 06Cr18Ni11Ti.
4. A device for reducing the fouling of the tail heating surfaces of a flue waste heat boiler used in the copper smelting industry according to claim 1, characterized in that, The material of the slag condensing flat steel (1) is 304H.
5. A device for reducing the fouling of the tail heating surfaces of a flue waste heat boiler used in the copper smelting industry according to claim 1, characterized in that, The material of the slag condensing flat steel (1) is 304 or 304L or 316L.