CN215982504U - General industry is useless exhaust-heat boiler over heater arrangement structure admittedly - Google Patents
General industry is useless exhaust-heat boiler over heater arrangement structure admittedly Download PDFInfo
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- CN215982504U CN215982504U CN202122188093.3U CN202122188093U CN215982504U CN 215982504 U CN215982504 U CN 215982504U CN 202122188093 U CN202122188093 U CN 202122188093U CN 215982504 U CN215982504 U CN 215982504U
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Abstract
The utility model relates to the field of general industrial solid waste heat boilers, in particular to a waste heat boiler superheater arrangement structure. The utility model provides a superheater arrangement structure of a general industrial solid waste heat boiler, which comprises a hearth, wherein a middle-temperature superheater high-temperature section, a high-temperature superheater, a middle-temperature superheater low-temperature section, a low-temperature superheater high-temperature section and a low-temperature superheater low-temperature section are sequentially arranged in a horizontal flue and the horizontal flue along the direction of flue gas, and the flue gas enters the horizontal flue from the hearth. The general industrial solid waste heat boiler superheater layout structure provided by the utility model is low in cost, only the layout form of the superheater needs to be adjusted and corrosion-resistant materials are adopted, the high-temperature section of the medium-temperature superheater and the high-temperature superheater are arranged in a concurrent flow manner, low-temperature steam firstly exchanges heat with high-temperature flue gas, the superheater does not need to be deposited, and the cost is only 1/3 of the superheater deposited; the corrosion prevention effect is good, the wall temperature of the superheater can be controlled below 482 ℃, and the corrosion rate is reduced.
Description
Technical Field
The utility model relates to the field of general industrial solid waste heat boilers, in particular to a waste heat boiler superheater arrangement structure.
Background
The general industrial solid waste refers to solid waste which is produced in industrial production, transportation, post and telecommunications industries and has no danger. Such as mine solid wastes such as tailings, waste rocks and waste rocks generated by mine enterprises, waste tires and rubber generated by transportation and manufacturing industries, waste paper generated by printing enterprises, leftover materials and leather edges generated by clothing processing industries, and the like. The incineration method is a treatment technology which can realize the harmlessness, reduction and recycling of the waste.
The general industrial solid waste fuel has complex components, and part of the fuel contains higher Na, K and Cl elements and has obvious high-temperature corrosion.
In the combustion process of general industrial solid wastes, alkaline salts (such as NaCl and KCl) are partially vaporized and deposited on a superheater tube according to the steam pressure at high temperature, and chloride salts with low melting points convert iron into ferric chloride with high volatility, so that a protective film is difficult to form on the surface of carbon steel, the corrosion of the tube wall is caused, the corrosion to a boiler in the combustion process of high-chlorine hazardous wastes is avoided, the larger the chlorine content is, the larger the corrosion degree is, and the higher the temperature of the tube wall is, the more serious the corrosion is. It has been studied that when the superheater wall temperature is higher than 482 ℃, the superheater corrosion rate increases sharply, and in order to avoid the superheater wall temperature being higher than the wall temperature, the arrangement structure of the superheater needs to be optimized.
SUMMERY OF THE UTILITY MODEL
The utility model provides an economical and effective superheater arrangement structure which can effectively reduce the high-temperature corrosion rate of a superheater and ensure long-term stable operation of a waste heat boiler. The utility model provides a superheater arrangement structure of a general industrial solid waste heat boiler, which comprises a hearth, wherein a middle-temperature superheater high-temperature section, a high-temperature superheater, a middle-temperature superheater low-temperature section, a low-temperature superheater high-temperature section and a low-temperature superheater low-temperature section are sequentially arranged in a horizontal flue and the horizontal flue along the direction of flue gas, and the flue gas enters the horizontal flue from the hearth.
Furthermore, a vertical flue is arranged between the hearth and the horizontal flue, and flue gas flows out of the hearth and sequentially passes through the vertical flue and the horizontal flue.
Specifically, the superheater adopted by the utility model is a superheater with the main steam temperature of 450 ℃ and the main steam pressure of 6.4 MPa.
Specifically, the transverse pitch of the high-temperature section of the medium-temperature superheater and the transverse pitch of the high-temperature superheater are not less than 200 mm.
Furthermore, the high-temperature section of the medium-temperature superheater and the high-temperature superheater are made of corrosion-resistant materials.
Specifically, the high-temperature section and the high-temperature superheater of the medium-temperature superheater are made of TP347H stainless steel which is a corrosion-resistant material.
Specifically, the areas of the medium-temperature superheater high-temperature section and the high-temperature superheater made of TP347H material are not less than 30% of the total area of the superheaters.
The utility model has the following advantages:
1. the general industrial solid waste heat boiler superheater layout structure provided by the utility model is low in cost, only the layout form of the superheater needs to be adjusted and corrosion-resistant materials are adopted, the high-temperature section of the medium-temperature superheater and the high-temperature superheater are arranged in a concurrent flow manner, low-temperature steam firstly exchanges heat with high-temperature flue gas, the superheater does not need to be deposited, and the cost is only 1/3 of the superheater deposited.
2. The general industrial solid waste heat boiler superheater layout structure provided by the utility model has a good corrosion prevention effect, the wall temperature of the superheater can be controlled below 482 ℃, and the corrosion rate is reduced.
Drawings
FIG. 1 is a schematic diagram of a superheater arrangement structure of a general industrial solid waste heat recovery boiler in an embodiment of the utility model;
fig. 2 shows a specific arrangement in a horizontal flue according to an embodiment of the utility model.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, specific details are set forth in order to provide a thorough understanding of the present invention, and similar modifications may be made by those skilled in the art without departing from the spirit of the present invention, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1 and fig. 2, in an embodiment of the present invention, a general superheater arrangement structure of an industrial solid waste heat recovery steam generator includes a furnace 1, a vertical flue 2, and a horizontal flue 3; the middle-temperature superheater high-temperature section 4, the high-temperature superheater 5, the middle-temperature superheater low-temperature section 6, the low-temperature superheater high-temperature section 7 and the low-temperature superheater low-temperature section 8 are sequentially arranged in the horizontal flue 3 along the flue gas direction, and flue gas flows out of the hearth 1 and sequentially passes through the vertical flue 2 and the horizontal flue 3. The high-temperature section of the medium-temperature superheater and the high-temperature superheater are arranged in a concurrent flow manner, so that low-temperature steam and high-temperature flue gas exchange heat firstly.
In a specific embodiment of the utility model, the superheater is a superheater with a main steam temperature of 450 ℃ and a main steam pressure of 6.4 MPa.
In a specific embodiment of the utility model, the pitch of the high-temperature section of the medium-temperature superheater and the pitch of the high-temperature superheater are 200 mm.
In an embodiment of the utility model, the areas of the medium-temperature superheater high-temperature section and the high-temperature superheater made of TP347H are not less than 30% of the total area of the superheaters.
The foregoing description of the various embodiments of the utility model is provided for the purpose of illustration only and is not intended to be limiting of the utility model. It should be noted that in the above description, features illustrated for one embodiment may be used in the same or similar manner in other embodiments, in combination with or instead of features in other embodiments. It will be appreciated by those skilled in the art that variations and modifications may be made to the above described embodiments without departing from the inventive concept thereof, which falls within the scope of the appended claims.
Claims (7)
1. The utility model provides a general industry is useless exhaust-heat boiler over heater arrangement structure admittedly, includes furnace, horizontal flue, its characterized in that: the middle-temperature superheater high-temperature section, the high-temperature superheater, the middle-temperature superheater low-temperature section, the low-temperature superheater high-temperature section and the low-temperature superheater low-temperature section are sequentially arranged in the horizontal flue along the flue gas direction, and the flue gas flows out of the hearth and enters the horizontal flue.
2. The superheater arrangement structure of the general industrial solid waste heat boiler according to claim 1, wherein a vertical flue is arranged between the furnace and the horizontal flue, and flue gas flows out of the furnace and sequentially passes through the vertical flue and the horizontal flue.
3. The superheater arrangement structure of the general industrial solid waste heat recovery boiler according to claim 1, wherein the superheater is a superheater with a main steam temperature of 450 ℃ and a main steam pressure of 6.4 MPa.
4. The superheater arrangement structure of the general industrial solid waste heat recovery boiler according to any one of claims 1 to 3, wherein the transverse pitch of the medium-temperature superheater high-temperature section and the high-temperature superheater is not less than 200 mm.
5. The superheater arrangement structure of the general industrial solid waste heat recovery boiler according to claim 4, wherein the high-temperature section of the medium-temperature superheater and the high-temperature superheater are made of corrosion-resistant materials.
6. The superheater arrangement structure of the general industrial solid waste heat recovery boiler according to claim 5, wherein the medium-temperature superheater high-temperature section and the high-temperature superheater are made of corrosion-resistant TP347H stainless steel.
7. The superheater arrangement structure of the general industrial solid waste heat recovery boiler according to any one of claims 5 or 6, wherein the areas of the medium-temperature superheater high-temperature section and the high-temperature superheater made of corrosion-resistant materials are not less than 30% of the total area of the superheaters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122188093.3U CN215982504U (en) | 2021-09-10 | 2021-09-10 | General industry is useless exhaust-heat boiler over heater arrangement structure admittedly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122188093.3U CN215982504U (en) | 2021-09-10 | 2021-09-10 | General industry is useless exhaust-heat boiler over heater arrangement structure admittedly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215982504U true CN215982504U (en) | 2022-03-08 |
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| CN202122188093.3U Active CN215982504U (en) | 2021-09-10 | 2021-09-10 | General industry is useless exhaust-heat boiler over heater arrangement structure admittedly |
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| CN (1) | CN215982504U (en) |
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2021
- 2021-09-10 CN CN202122188093.3U patent/CN215982504U/en active Active
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