CN210274579U - Acid-resistant, wear-resistant and high-temperature-resistant indirect heater - Google Patents
Acid-resistant, wear-resistant and high-temperature-resistant indirect heater Download PDFInfo
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- CN210274579U CN210274579U CN201920653996.4U CN201920653996U CN210274579U CN 210274579 U CN210274579 U CN 210274579U CN 201920653996 U CN201920653996 U CN 201920653996U CN 210274579 U CN210274579 U CN 210274579U
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Abstract
An indirect heater with acid resistance, wear resistance and high temperature resistance, wherein a heating source (7) is arranged in a steel pipe (1); coating a layer of heat-conducting daub (2) on the outer surface of the steel pipe (1); lining an acid-resistant metal protective layer (3) on the outer surface of the heat-conducting daub (2); the outer surface of the acid-resistant metal protective layer (3) is lined with an acid-resistant wear-resistant heat-conducting non-metal protective layer (4); a gap (5) is arranged between the acid-resistant metal protective layer (3) and the wear-resistant nonmetal protective layer (4), and the gap is filled with acid-resistant heat-conducting daub (6). The utility model has the advantages of long service life and high cost performance for the indirect heating of the fluid containing acid and solid (solid particles).
Description
Technical Field
The utility model belongs to the technical field of heating devices for acid-containing and solid-containing fluids in the industries of metallurgy, chemical engineering and the like.
Background
In the practice of metallurgy and chemical industry, heating of solid-containing liquid containing acid is often required. In which direct heating is easy to achieve and is therefore currently in widespread use. The disadvantages of direct heating are: in the heating process, a large amount of fluid (high-temperature flue gas or steam and the like) is additionally brought into the heated fluid, so that the material ratio of the heated fluid is influenced. Indirect heating can overcome the disadvantages of direct heating, but also puts severe demands on the heater: heaters placed in the acid-containing solids-containing fluid must be resistant to acid, abrasion and high temperatures. At the same time, it also has very high heat conductivity! The non-metal indirect heater used at present is graphite or silicon carbide and the like. But the inherent high porosity and brittleness of the non-metallic material seriously affect the reliability and the service life of the non-metallic material; the metal indirect heater is made of titanium alloy, zirconium alloy, special acid-resistant stainless steel and other materials, but when the temperature exceeds 120 ℃, under the condition that the heated fluid has scouring wear on the outer surface of the heater, the service life is very short (the longest service time is not more than 180 days)! In order to prolong the service life, the thickness of the acid-resistant metal is only increased, so that the manufacturing cost is high and the cost performance is low.
Disclosure of Invention
The utility model aims at providing a long-life, high price/performance ratio heater that can carry out high temperature indirect heating for containing acid and solid fluid.
The utility model aims at realizing through the following mode:
an indirect heater with acid resistance, wear resistance and high temperature resistance, wherein a heating source is arranged in a steel pipe; coating a layer of heat-conducting daub on the outer surface of the steel pipe; lining an acid-resistant metal protective layer on the outer surface of the heat-conducting daub; the outside of the acid-resistant metal protective layer is lined with an acid-resistant wear-resistant heat-conducting non-metal protective layer; a gap is arranged between the acid-resistant metal protective layer and the wear-resistant nonmetal protective layer, and the gap is filled with acid-resistant heat-conducting daub.
The utility model discloses provide structural support with ordinary steel pipe, the inboard of steel pipe is arranged in to the heat source. The outer side of the steel pipe is lined with a metal acid-resistant protective layer, and because acid-resistant metals are expensive, only a thin liner layer is needed to prevent acid liquor from corroding the steel pipe; gaps are certainly formed between the two layers of metal to influence heat conduction, so that the space between the steel pipe and the acid-resistant metal lining is fully covered by the daub with high heat conduction performance; the acid resistance of most metals is based on the formation of an acid-resistant protective film on their surface. Once the protective film is destroyed by abrasion, the acid resistance of the metal itself is thus lost! This is also the reason why the existing metal indirect heater has not long service life. The outside of the metal acid-resistant protective layer is lined with an acid-resistant, wear-resistant and heat-conducting non-metal protective layer, so that the acid-resistant protective layer of the acid-resistant metal is not abraded and washed away, and the long service life of the metal acid-resistant protective layer is ensured. A gap is formed between the metal acid-resistant protective layer and the nonmetal wear-resistant protective layer and is filled with special acid-resistant heat-conducting daub. On one hand, the acid-resistant heat-conducting daub ensures the integral heat-conducting performance of the heater, and simultaneously, the acid-resistant heat-conducting daub and the non-metal protective layer are connected into a whole while absorbing the thermal expansion of the metal protective layer and the non-metal protective layer well.
The utility model has the advantages that: the long-life and high-cost-performance heater can indirectly heat the fluid containing acid and solid (solid particles) at high temperature.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic diagram of the present invention installed in a reaction tank.
Detailed Description
As shown in fig. 1: the utility model is provided with a heating source 7 inside the steel pipe 1; coating a layer of heat-conducting daub 2 on the outer surface of the steel pipe 1; a metal acid-resistant protective layer 3 is lined outside the heat-conducting daub 2; a non-metal acid-resistant wear-resistant heat-conducting protective layer 4 is lined outside the metal acid-resistant protective layer 3; a gap 5 is arranged between the metal acid-resistant protective layer 3 and the nonmetal acid-resistant wear-resistant heat-conducting protective layer 4, and the gap 5 is filled with acid-resistant and conductive clay 6.
The utility model relates to a concrete embodiment as follows:
the supporting steel pipe 1 is a 304 high-temperature-resistant stainless steel pipe with the specification of phi 530x10mm and the length L of 5000mm, the built-in heat source 7 is a resistance wire and the power is 90 kW; the heater steel pipe is externally coated with graphite heat-conducting daub with the thickness of 1 mm; lining a lead alloy plate with the thickness of 2 mm; then applying acid-resistant heat-conducting silicon carbide cement with the thickness of 2 mm; finally lining a layer of silicon carbide tube with the thickness of 10 mm.
The indirect heater shown in FIG. 2 is installed in a reaction tank with a diameter of 5000mm, and the reaction tank is filled with a mixed slurry of sulfuric acid and mineral powder and is continuously stirred by a stirring paddle. The concentration of the sulfuric acid is 40-50%, the upper limit heating temperature is 145 ℃, and the service life is not less than 5 years.
Claims (1)
1. The utility model provides an acidproof wear-resisting high temperature resistant indirect heater, includes steel pipe and heating source (7), characterized by: the heating source (7) is arranged in the steel pipe (1); coating a layer of heat-conducting daub (2) on the outer surface of the steel pipe (1); lining an acid-resistant metal protective layer (3) on the outer surface of the heat-conducting daub (2); the outer surface of the acid-resistant metal protective layer (3) is lined with an acid-resistant wear-resistant heat-conducting non-metal protective layer (4); a gap (5) is arranged between the acid-resistant metal protective layer (3) and the wear-resistant nonmetal protective layer (4), and the gap is filled with acid-resistant heat-conducting daub (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920653996.4U CN210274579U (en) | 2019-05-09 | 2019-05-09 | Acid-resistant, wear-resistant and high-temperature-resistant indirect heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920653996.4U CN210274579U (en) | 2019-05-09 | 2019-05-09 | Acid-resistant, wear-resistant and high-temperature-resistant indirect heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210274579U true CN210274579U (en) | 2020-04-07 |
Family
ID=70024219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920653996.4U Active CN210274579U (en) | 2019-05-09 | 2019-05-09 | Acid-resistant, wear-resistant and high-temperature-resistant indirect heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210274579U (en) |
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2019
- 2019-05-09 CN CN201920653996.4U patent/CN210274579U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230113 Address after: 651500 Chongde Industrial Park, Luquan, Kunming, Yunnan Patentee after: Kunming Luquan Deli silicon carbide product Co.,Ltd. Address before: 651500 Dali silicon carbide products Co., Ltd., Chongde Industrial Park, Luquan County, Kunming City, Yunnan Province Patentee before: Hu Guangxiong |
|
| TR01 | Transfer of patent right |