CN211902819U - Boiler with reheating municipal refuse and sludge for combustion - Google Patents
Boiler with reheating municipal refuse and sludge for combustion Download PDFInfo
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- CN211902819U CN211902819U CN202020435666.0U CN202020435666U CN211902819U CN 211902819 U CN211902819 U CN 211902819U CN 202020435666 U CN202020435666 U CN 202020435666U CN 211902819 U CN211902819 U CN 211902819U
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Abstract
The utility model provides a boiler of municipal refuse for reheat combustion and mud, including boiler furnace and boiler flue, boiler flue is provided with high temperature reheater, high temperature superheater, low temperature reheater and medium temperature superheater along the preceding stove rear direction, and the flue inner wall still is provided with package wall diaphragm wall low temperature superheater, the surface with the flue gas contact of high temperature reheater, high temperature superheater, low temperature reheater, medium temperature superheater and package wall diaphragm wall low temperature superheater has laid fire-resistant castable layer, the utility model discloses the superheater adopts fire-resistant wear-resistant castable to lay, and the heat of flue gas passes through fire-resistant wear-resistant castable conduction to superheater pipe, makes corrosivity high temperature flue gas and high temperature superheater pipe metal outer wall isolated, avoids the corruption of high temperature superheater pipe wall, and the improvement of steam temperature makes the thermal efficiency of circulation improve simultaneously.
Description
Technical Field
The utility model relates to a take boiler of municipal refuse and mud for reheat combustion.
Background
The urban garbage and sludge have high alkali metal (potassium and sodium) content, and the urban garbage and sludge have high chlorine content such as plastics, which all cause the serious corrosion problem of the urban garbage and sludge boiler high-temperature superheater. The corrosion type of the urban garbage and sludge boiler high-temperature superheater is mainly high-temperature fusion corrosion of alkali metal chloride, and the urban garbage and sludge boiler high-temperature superheater has a typical corrosion temperature interval. When the steam temperature of the superheater pipeline or the reheater pipeline is less than 450 ℃ (the temperature of the pipe wall is less than 480 ℃), the corrosion can be ignored; when the steam temperature is 490-520 ℃, the corrosion rate is increased; when the steam temperature is more than 520 deg.c, the corrosion rate increases very rapidly. Therefore, in the existing thermal cycle system of the municipal waste and sludge power station, the temperature of the main steam and the temperature of the reheated steam are mostly selected below 450 ℃ to ensure the safety of the superheater tubes, so that the initial temperature and the initial pressure of the steam in the Rankine cycle are greatly limited, and the thermal efficiency of the Rankine cycle is reduced. The existing corrosion solving method after improving the initial parameters of steam is to select a superheater tube made of more than P91 and to spray metal, but the methods only can properly prolong the operation period and cannot solve the corrosion problem fundamentally.
Disclosure of Invention
The utility model discloses improve above-mentioned problem, promptly the to-be-solved technical problem of the utility model is that the garbage combustion boiler was corroded easily now.
The utility model discloses a concrete implementation scheme is: the utility model provides a take boiler of municipal refuse for reheat combustion and mud, includes boiler furnace and boiler flue, boiler flue is provided with high temperature reheater, high temperature superheater, low temperature reheater and well temperature superheater along the stove front to stove rear direction, the flue inner wall still is provided with package wall diaphragm wall low temperature superheater, the surface that high temperature reheater, high temperature superheater, low temperature reheater, well temperature superheater and package wall diaphragm wall low temperature superheater contacted with the flue gas has laid fire-resistant castable layer.
Furthermore, a high-temperature separator is arranged at a flue gas outlet of the boiler hearth, the boiler flue comprises a second channel, a third channel, a fourth channel and a fifth channel which are sequentially communicated from the front of the boiler to the rear of the boiler at the outlet of the high-temperature separator, the high-temperature reheater and the high-temperature superheater are located in the second channel, the low-temperature reheater and the medium-temperature superheater are located in the third channel, a coil pipe low-temperature superheater is arranged in the fourth channel, an economizer is arranged in the fifth channel, and the wall-wrapped membrane wall low-temperature superheater is located on the inner walls of the second channel and the third channel.
Furthermore, a boiler drum is arranged at the top of the boiler, and an inlet header of the wall-covered membrane-type wall low-temperature superheater is connected with a steam outlet pipe of the boiler drum; an outlet header of the wall-wrapped membrane type wall low-temperature superheater is communicated with an inlet header of the coiled pipe low-temperature superheater; an outlet header of the coiled pipe low-temperature superheater is communicated with an inlet header of the medium-temperature superheater; the outlet header of the medium-temperature superheater is communicated with the inlet header of the high-temperature superheater, the outlet header of the high-temperature superheater is communicated with the steam inlet of a high-pressure cylinder of a steam turbine, the steam outlet of the high-pressure cylinder of the steam turbine is communicated with the inlet header of a low-temperature reheater, the outlet header of the low-temperature reheater is communicated with the inlet header of the high-temperature reheater, the outlet header of the high-temperature reheater is communicated with the steam inlet of a medium-pressure cylinder of the steam turbine, and the output end of the steam turbine is connected with.
Furthermore, the high-temperature reheater is a screen-type high-temperature reheater, the screen-type high-temperature reheater is hung on the left side of the second channel of the boiler, the screen-type high-temperature reheater comprises a steel pipe, fins are welded on the outer side of the steel pipe, and heat-resistant steel bars are welded on two sides of the fins.
Furthermore, the high-temperature superheater is a screen type high-temperature superheater, the screen type high-temperature superheater is hung on the right side of the second channel of the boiler, the screen type high-temperature reheater comprises a steel pipe, fins are welded on the outer side of the steel pipe, and heat-resistant reinforcing steel bars are welded on two sides of the fins.
Furthermore, the medium temperature superheater is a screen type medium temperature superheater, the screen type medium temperature superheater is hung on the right side of a third channel of the boiler and comprises a steel pipe, fins are welded on the outer side of the steel pipe, and heat-resistant reinforcing steel bars are welded on two sides of the fins.
Furthermore, the low-temperature reheater is a screen-type low-temperature reheater, the screen-type low-temperature reheater is hung on the left side of a third channel of the boiler and comprises a steel pipe, fins are welded on the outer side of the steel pipe, and heat-resistant steel bars are welded on two sides of the fins.
Furthermore, an outlet header of the coiled pipe low-temperature superheater is communicated with an inlet header of the screen type medium-temperature superheater through a primary water spraying temperature reduction device.
Furthermore, an outlet header of the medium-temperature superheater is communicated with an inlet header of the screen type high-temperature superheater through a secondary water spraying temperature reduction device.
Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses low temperature over heater adopts packet wall diaphragm type wall structure type, and high temperature re-heater, high temperature over heater, low temperature re-heater and the middle temperature over heater outside that are located the flue all adopt the wear resistant castable of fire resistance to lay, and the heat of flue gas passes through the wear resistant castable of fire resistance and conducts to superheater pipe, makes corrosivity high temperature flue gas and high temperature superheater pipe metal outer wall isolated. Thus, the pipe wall corrosion of the high-temperature superheater is avoided, and the cycle heat efficiency is improved due to the improvement of the steam temperature. In addition, the temperature of the municipal waste and sludge boiler is improved while the superheated steam pressure is improved through the connection and matching of the plurality of superheaters, so that the superheated steam pressure is matched with the temperature, the reheated steam temperature is improved, the work capacity of the main steam and the reheated steam in the steam turbine is improved, and the cycle heat efficiency is improved.
Drawings
FIG. 1 is a schematic view of the structure of a boiler with reheating municipal refuse and sludge for combustion according to the present invention;
FIG. 2 is a schematic cross-sectional view of the screen-type high-temperature reheater, the screen-type high-temperature superheater, the screen-type low-temperature reheater, and the screen-type medium-temperature superheater.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1-2, the utility model relates to a take boiler of municipal refuse for reheat combustion and mud, boiler including high parameter, the boiler is fired and is used fuel for municipal refuse and mud, including boiler furnace and boiler flue, boiler furnace exhanst gas outlet is equipped with high temperature separator, and boiler flue includes second passageway, third passageway, fourth passageway and the fifth passageway that high temperature separator exit communicates in proper order by the preceding stove rear direction of stove. The top of the boiler is provided with a steam pocket 1, and a wall-wrapping membrane wall low-temperature superheater 2, a coiled pipe low-temperature superheater 3, a screen type medium-temperature superheater 4, a screen type high-temperature superheater 5, a screen type low-temperature reheater 6, a screen type high-temperature reheater 7 and an economizer 8 are arranged in a flue.
The screen type high-temperature reheater 7 and the screen type high-temperature superheater 5 are located in a second channel, the screen type low-temperature reheater 6 and the screen type medium-temperature superheater 4 are located in a third channel, a coil pipe low-temperature superheater is arranged in the fourth channel, an economizer 8 is arranged in a fifth channel, and the wall-wrapped diaphragm wall low-temperature superheater is located on the inner walls of the second channel and the third channel.
In this embodiment, the screen type high-temperature reheater is hung on the left side of the second channel of the boiler, the screen type high-temperature superheater is hung on the right side of the second channel of the boiler, the screen type medium-temperature superheater is hung on the right side of the third channel of the boiler, and the screen type low-temperature reheater is hung on the left side of the third channel of the boiler.
The fire-facing surfaces of the wall-wrapping diaphragm wall low-temperature superheater 2, the screen type medium-temperature superheater 4, the screen type high-temperature superheater 5, the screen type low-temperature reheater 6 and the high-temperature screen type reheater 7 are laid by adopting refractory and wear-resistant castable 11, heat absorbing media are introduced into the superheater or the reheated steel pipe, the fins are used for improving the heat conducting area, and the heat-resistant reinforcing steel bars can improve the combination stability with the refractory and wear-resistant castable.
When the device works, the heat of the flue gas is conducted to the superheater tube through the refractory wear-resistant castable, so that the corrosive high-temperature flue gas is isolated from the metal outer wall of the high-temperature superheater tube. Thus, the pipe wall corrosion of the high-temperature superheater is avoided, and the cycle heat efficiency is improved due to the improvement of the steam temperature.
In the embodiment, the refractory and wear-resistant castable is commercially available and is conventionally used in thermal power stations, boilers, casting furnaces, particle combustion furnaces, heating furnaces, steel plants, cement plants, heat treatment furnaces, induction furnaces and the like.
The specific connection mode is that an inlet header A2 of the wall-wrapped diaphragm wall low-temperature superheater is connected with a steam outlet pipe A1 of a boiler drum; an outlet header A3 of the wall-wrapped diaphragm wall low-temperature superheater is communicated with an inlet header A4 of the coiled pipe low-temperature superheater; an outlet header A5 of the serpentine pipe low-temperature superheater is communicated with an inlet header of the screen type medium-temperature superheater; the outlet header of the screen type medium temperature superheater is communicated with the inlet header of the screen type high temperature superheater, the outlet header of the screen type high temperature superheater is communicated with the steam inlet of a high pressure cylinder of a steam turbine, the steam outlet of the high pressure cylinder of the steam turbine is communicated with the inlet header of a screen type low temperature reheater, the outlet header of the screen type low temperature reheater is communicated with the inlet header of the screen type high temperature reheater, the outlet header of the screen type high temperature reheater is communicated with the steam inlet of a medium pressure cylinder of the steam turbine, and the steam turbine is coaxially connected with a generator to provide power for the generator.
In this embodiment, the outlet header of the serpentine low-temperature superheater and the inlet header of the platen medium-temperature superheater are communicated through a primary water spray attemperator.
In this embodiment, the outlet header of the medium-temperature superheater and the inlet header of the platen high-temperature superheater are communicated through a two-stage water spray attemperator.
In this embodiment, the steam generation parameters of the boiler are as follows: the pressure of the main steam is 5.29-13.7MPa, and the temperature of the main steam is more than or equal to 540 ℃; the temperature of the reheated steam is more than or equal to 480 ℃.
The connecting structure has the advantages that the temperature of the municipal waste and sludge boiler is increased while the superheated steam pressure is increased, so that the superheated steam pressure is matched with the temperature, the reheated steam temperature is increased, the acting capacity of main steam and reheated steam in a steam turbine is improved, and the circulating heat efficiency is improved.
Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.
If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.
Also, above-mentioned the utility model discloses if disclose or related to mutually fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).
In addition, the terms used in any aspect of the present disclosure as described above to indicate positional relationships or shapes include similar, analogous, or approximate states or shapes unless otherwise stated.
The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (9)
1. The utility model provides a take boiler of municipal refuse for reheat combustion and mud, its characterized in that, includes boiler furnace and boiler flue, boiler flue is provided with high temperature reheater, high temperature superheater, low temperature reheater and well temperature superheater along the stove front to stove rear direction, the flue inner wall still is provided with package wall diaphragm wall low temperature superheater, the surface that high temperature reheater, high temperature superheater, low temperature reheater, well temperature superheater and package wall diaphragm wall low temperature superheater contacted with the flue gas has laid fire-resistant castable layer.
2. The boiler with reheating municipal refuse and sludge for combustion as claimed in claim 1, wherein the boiler furnace flue gas outlet is provided with a high temperature separator, the boiler flue comprises a second channel, a third channel, a fourth channel and a fifth channel, the second channel, the third channel, the fourth channel and the fifth channel are sequentially communicated from the front of the boiler to the rear of the boiler, the high temperature reheater and the high temperature superheater are located in the second channel, the low temperature reheater and the medium temperature superheater are located in the third channel, the serpentine low temperature superheater is arranged in the fourth channel, the economizer is arranged in the fifth channel, and the wall-wrapped membrane wall low temperature superheater is located on the inner walls of the second channel and the third channel.
3. The boiler with the reheating municipal refuse and sludge for combustion as claimed in claim 1, wherein a boiler drum is arranged at the top of the boiler, and an inlet header of the wall-wrapped membrane wall low-temperature superheater is connected with a steam outlet pipe of the boiler drum; an outlet header of the wall-wrapped membrane type wall low-temperature superheater is communicated with an inlet header of the coiled pipe low-temperature superheater; an outlet header of the coiled pipe low-temperature superheater is communicated with an inlet header of the medium-temperature superheater; the outlet header of the medium-temperature superheater is communicated with the inlet header of the high-temperature superheater, the outlet header of the high-temperature superheater is communicated with the steam inlet of a high-pressure cylinder of a steam turbine, the steam outlet of the high-pressure cylinder of the steam turbine is communicated with the inlet header of a low-temperature reheater, the outlet header of the low-temperature reheater is communicated with the inlet header of the high-temperature reheater, the outlet header of the high-temperature reheater is communicated with the steam inlet of a medium-pressure cylinder of the steam turbine, and the output end of the steam turbine is connected with.
4. The boiler with reheating combustion of municipal refuse and sludge as claimed in claim 1, 2 or 3, wherein the high temperature reheater is a screen type high temperature reheater, the screen type high temperature reheater is hung on the left side of the second channel of the boiler, the screen type high temperature reheater comprises a steel pipe, fins are welded on the outer side of the steel pipe, and heat-resistant steel bars are welded on the two sides of the fins.
5. The boiler with reheating combustion of municipal waste and sludge as claimed in claim 1, 2 or 3, wherein the high temperature superheater is a screen type high temperature superheater, the screen type high temperature superheater is hung on the right side of the second channel of the boiler, the screen type high temperature reheater comprises a steel pipe, fins are welded on the outer side of the steel pipe, and heat-resistant steel bars are welded on the two sides of the fins.
6. The boiler with reheating combustion of municipal waste and sludge according to claim 1, 2 or 3, wherein the medium temperature superheater is a screen medium temperature superheater, the screen medium temperature superheater is hung on the right side of the third channel of the boiler, the screen medium temperature superheater comprises a steel pipe, fins are welded on the outer side of the steel pipe, and heat-resistant steel bars are welded on two sides of the fins.
7. The boiler of claim 1, 2 or 3, wherein the low-temperature reheater is a screen-type low-temperature reheater, the screen-type low-temperature reheater is hung on the left side of a third channel of the boiler, the screen-type low-temperature reheater comprises a steel pipe, fins are welded on the outer side of the steel pipe, and heat-resistant steel bars are welded on two sides of the fins.
8. The boiler for reheating municipal refuse and sludge for combustion as claimed in claim 3, wherein the outlet header of the coiled low-temperature superheater and the inlet header of the platen medium-temperature superheater are communicated through a primary water spray attemperator.
9. The boiler for reheating municipal refuse and sludge for combustion as claimed in claim 3, wherein the outlet header of the medium-temperature superheater and the inlet header of the platen high-temperature superheater are communicated through a two-stage water spray attemperator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020435666.0U CN211902819U (en) | 2020-03-30 | 2020-03-30 | Boiler with reheating municipal refuse and sludge for combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020435666.0U CN211902819U (en) | 2020-03-30 | 2020-03-30 | Boiler with reheating municipal refuse and sludge for combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211902819U true CN211902819U (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020435666.0U Active CN211902819U (en) | 2020-03-30 | 2020-03-30 | Boiler with reheating municipal refuse and sludge for combustion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211902819U (en) |
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2020
- 2020-03-30 CN CN202020435666.0U patent/CN211902819U/en active Active
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