CN211486943U - Superheated steam filter for boiler continuous drainage waste heat recovery - Google Patents
Superheated steam filter for boiler continuous drainage waste heat recovery Download PDFInfo
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- CN211486943U CN211486943U CN201921762928.8U CN201921762928U CN211486943U CN 211486943 U CN211486943 U CN 211486943U CN 201921762928 U CN201921762928 U CN 201921762928U CN 211486943 U CN211486943 U CN 211486943U
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Abstract
The utility model relates to a superheated steam filter for recovering waste heat of continuous drainage of a boiler, which comprises a shell, wherein one end of the shell is provided with an air inlet, the other end of the shell is provided with an air outlet which is vertical to the direction of the air inlet, a tube plate is arranged inside the shell, and a filter tube which is horizontally arranged along the air inlet direction is arranged on the tube plate; the filter element of the filter pipe is of a multilayer structure and sequentially comprises a supporting layer, a precision filter layer, an external protective layer and a coarse filter layer from inside to outside; the top of the shell is provided with a cleaning port, the cleaning port is used for introducing high-temperature superheated water into the shell, and the bottom of the shell is provided with a water outlet; the shell is provided with a differential pressure detection port which is arranged in the front and back direction and is close to the tail end of the filter pipe, and the opening or closing of the cleaning port is controlled by a differential pressure value acquired by the differential pressure detection port. The utility model discloses can filter the sediment suspended solid in the steam to pour into the high temperature superheated water through the washing mouth and wash the dirt on filter core surface, can play palingenetic effect to the filter core, guarantee the continuous operation of filter and the high quality of steam.
Description
Technical Field
The utility model relates to a steam filter technical field specifically is a superheated steam filter for boiler even drainage waste heat recovery.
Background
Thermal power generation is a main power generation mode in China, and a power station boiler is used as one of three main devices of a thermal power station and is developed along with the development of the thermal power industry in China. The reasonable utilization of the waste heat in the production process as secondary energy has important effects on reducing the production cost, saving energy and reducing emission. In the aspect of waste heat utilization, the continuous drainage waste heat recovery of a boiler steam drum has objective economic benefits, and in practical application, the method with the highest recovery utilization rate usually adopts temperature reduction, pressure reduction, capacity expansion and hot hydrocarbon compensation on continuous drainage, so that the continuous drainage is almost completely converted into recyclable superheated steam. The superheated steam is formed by converting boiler continuous drainage which is used as boiler sewage, and contains a certain amount of salt, alkali and calcium-magnesium slag suspended matters, and the impurities can exist in the superheated steam in the processes of temperature reduction, pressure reduction and capacity expansion.
To improve the quality of the steam, the superheated steam needs to be subjected to fine filtration after temperature and pressure reduction, expansion and hot hydrocarbon compensation. The invention designs the superheated steam filter for recovering the waste heat of the continuous drainage of the boiler based on the characteristics of impurities in the superheated steam converted by the continuous drainage, can effectively intercept the impurities in the steam, and can clean and regenerate a filter element.
SUMMERY OF THE UTILITY MODEL
In order to achieve the above purpose, the present invention adopts the following specific technical scheme:
a superheated steam filter for recovering waste heat of continuous drainage of a boiler comprises a shell, wherein one end of the shell is provided with an air inlet, the other end of the shell is provided with an air outlet in a direction vertical to the air inlet, a tube plate is arranged in the shell, and a filter tube horizontally arranged along the air inlet direction is arranged on the tube plate; the filter element of the filter pipe is of a multilayer structure and sequentially comprises a supporting layer, a precision filter layer, an external protective layer and a coarse filter layer from inside to outside; the top of the shell is provided with a cleaning port, the cleaning port is used for introducing high-temperature superheated water into the shell, and the bottom of the shell is provided with a water outlet; and a differential pressure detection port which is arranged in the front and back is arranged at the end part of the shell close to the filter pipe, and the opening or closing of the cleaning port is controlled by a differential pressure value acquired by the differential pressure detection port.
Further arranged, a porous anti-impact gas distribution plate is arranged at a position close to the air inlet inside the shell, and a sewage discharge outlet is formed in the bottom of the shell below the porous anti-impact gas distribution plate.
Further, an anti-impact baffle is arranged in the shell below the cleaning opening.
Further, the filter pipe is assembled by adopting a multi-section mode.
Further, the filter pipes are arranged in a multi-layer mode, and the filter pipes in each layer are supported by a support at intervals.
Further, a pressure detection port and a safety valve are arranged on the shell.
Further, an access hole is formed in the position, opposite to the air inlet, of the tail end of the shell.
Further, the supporting layer is made into a cylinder by rolling a porous metal screen plate, the precise filtering layer is made into a cylinder by rolling a multilayer sintered metal screen, the external protective layer is made into a cylinder by rolling a square punching screen plate, and the rough filtering layer is made into a single-layer metal filter screen.
The utility model provides an overheated steam filter mainly designs to the even waste heat recovery of drainage of boiler, can effectively filter salt, alkali and calcium magnesium sediment suspended solid in the steam to can pour into the high temperature superheated water through the washing mouth and wash the dirt on filter core surface in to the casing, can play palingenetic effect to the filter core, can guarantee the continuous operation of filter and the excellent quality after the steam filtration.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The embodiment discloses a superheated steam filter for recovering waste heat of continuous drainage of a boiler, which has a structure shown in figure 1 and mainly comprises a cylindrical shell 11 with end sockets at two ends, wherein the bottom of the shell 11 is supported by supporting legs 12. Along the steam inlet direction, the leftmost end of the shell 11 is an air inlet 1, and the tail end of the shell 11 is provided with an air outlet 9 perpendicular to the direction of the air inlet 1. A tube plate 16 in the vertical direction is fixed inside the shell 11, a filter tube 14 arranged horizontally is installed on the tube plate 16, and the filter tube 14 is fixed on the tube plate 16 through a flange. The filter tube 14 can be assembled in multiple sections, which is convenient for disassembly and cleaning. The filter pipes 14 can be arranged in a plurality of layers at intervals, and the filter pipes 14 in each layer are supported and isolated by the bracket 15, so that the filter pipes 14 can be prevented from moving. In order to better filter out suspended matters in the steam, the filter element of the filter pipe 14 adopts a multilayer structure, namely, the filter element sequentially comprises a supporting layer, a precision filter layer, an external protective layer and a coarse filter layer from inside to outside; the supporting layer is made into a cylinder by rolling a porous metal screen plate, the precise filtering layer is made into a cylinder by rolling a plurality of layers of sintered metal screens, the external protective layer is made into a cylinder by rolling a square punched screen plate, and the rough filtering layer is made into a single-layer metal filter screen. The outermost layer of the filter pipe 14 is used for primarily filtering scaling substances in the steam pipeline, and the precise filter layer is used for intercepting finer particles in the steam.
Considering the continuous operation requirement of production, avoid piling up the dirt on the filter core surface of filter tube 14 and influence the filter effect, this embodiment has still seted up cleaning opening 4 at the top of casing 11, and cleaning opening 4 is used for leading-in high temperature superheated water to casing 11 inside for dissolve the dirt on filter core surface, is equipped with scour protection baffle 5 in the casing 11 below cleaning opening 4, avoids wasing too big direct impact filter tube 14 of water pressure, and the bottom of casing 11 is equipped with outlet 13, washs water and discharges from outlet 13. The cleaning port 4 can realize online real-time cleaning, plays a role in regenerating the filter element and can delay the service life of the filter element.
Further in order to prolong the life of filter core in the filter tube to and avoid steam pressure too big to cause the impact to filter tube 14, set up safety valve 3 and the pressure measurement mouth 6 that is used for monitoring pressure on casing 11, and still install porous scour protection gas distribution plate 2 in the casing 11 of air inlet 1 inboard, drain 17 is seted up to the 11 bottoms of casing of porous scour protection gas distribution plate 2 below. The porous anti-impact gas distribution plate 2 can play a role in preliminarily intercepting large suspended matters of particles in steam, and the intercepted suspended matters are discharged from the sewage outlet 17.
In order to realize the automatic cleaning control of the filter element, the shell 11 is provided with pressure difference detection ports 7 and 8 which are arranged in the front and back direction near the tail end of the filter pipe 14, vapor pressure values at the pressure difference detection port 7 and the pressure difference detection port 8 are respectively collected, the pressure difference between the two ports is calculated, if the pressure difference is within a set threshold range, the filter element is good in operation condition and does not need to be cleaned, if the pressure difference exceeds the set threshold, the filter element is blocked by dirt accumulation and needs to be cleaned in time, and at the moment, the pressure difference value can be used as a trigger signal for controlling the opening or closing of the cleaning port 4. The tail end of the shell 11 is also provided with an access hole 10 opposite to the air inlet 1, so that the inside of the shell can be conveniently overhauled.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a superheated steam filter for boiler even drainage waste heat recovery, includes the casing, and the one end of casing is equipped with the air inlet, and the other end perpendicular to air inlet direction of casing is equipped with the gas outlet, and the casing is inside to be equipped with the tube sheet, installs the filter tube of arranging along the direction level of admitting air on the tube sheet, its characterized in that: the filter element of the filter pipe is of a multilayer structure and sequentially comprises a supporting layer, a precision filter layer, an external protective layer and a coarse filter layer from inside to outside; the top of the shell is provided with a cleaning port, the cleaning port is used for introducing high-temperature superheated water into the shell, and the bottom of the shell is provided with a water outlet; and a differential pressure detection port which is arranged in the front and back is arranged at the end part of the shell close to the filter pipe, and the opening or closing of the cleaning port is controlled by a differential pressure value acquired by the differential pressure detection port.
2. The superheated steam filter for recovering the waste heat of the continuous drainage of the boiler as claimed in claim 1, wherein: a porous anti-impact gas distribution plate is arranged in the shell and close to the air inlet, and a sewage discharge outlet is formed in the bottom of the shell below the porous anti-impact gas distribution plate.
3. The superheated steam filter for recovering the waste heat of the continuous drainage of the boiler as claimed in claim 1, wherein: an anti-impact baffle is arranged in the shell below the cleaning opening.
4. The superheated steam filter for recovering the waste heat of the continuous drainage of the boiler as claimed in claim 1, wherein: the filter tube is assembled by adopting a multi-section mode.
5. The superheated steam filter for recovering the waste heat of the continuous drainage of the boiler as claimed in claim 1, wherein: the filter pipes are arranged in a multi-layer mode, and the filter pipes in each layer are supported by a support at intervals.
6. The superheated steam filter for recovering the waste heat of the continuous drainage of the boiler as claimed in claim 1, wherein: and the shell is provided with a pressure detection port and a safety valve.
7. The superheated steam filter for recovering the waste heat of the continuous drainage of the boiler as claimed in claim 1, wherein: and an access hole is formed in the position, opposite to the air inlet, of the tail end of the shell.
8. The superheated steam filter for recovering the waste heat of the continuous drainage of the boiler as claimed in claim 1, wherein: the supporting layer is made into a cylinder by rolling a porous metal screen plate, the precision filter layer is made into a cylinder by rolling a plurality of layers of sintered metal screens, the external protective layer is made into a cylinder by rolling a square punched screen plate, and the rough filter layer is made into a single-layer metal filter screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762928.8U CN211486943U (en) | 2019-10-21 | 2019-10-21 | Superheated steam filter for boiler continuous drainage waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921762928.8U CN211486943U (en) | 2019-10-21 | 2019-10-21 | Superheated steam filter for boiler continuous drainage waste heat recovery |
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| Publication Number | Publication Date |
|---|---|
| CN211486943U true CN211486943U (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921762928.8U Active CN211486943U (en) | 2019-10-21 | 2019-10-21 | Superheated steam filter for boiler continuous drainage waste heat recovery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834046A (en) * | 2021-11-04 | 2021-12-24 | 绍兴广通节能环保科技有限公司 | Enthalpy-enhanced steam purification recovery process for sewage water of power plant |
-
2019
- 2019-10-21 CN CN201921762928.8U patent/CN211486943U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113834046A (en) * | 2021-11-04 | 2021-12-24 | 绍兴广通节能环保科技有限公司 | Enthalpy-enhanced steam purification recovery process for sewage water of power plant |
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