CN203115976U - Novel low-temperature coal economizer - Google Patents
Novel low-temperature coal economizer Download PDFInfo
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- CN203115976U CN203115976U CN2013201288727U CN201320128872U CN203115976U CN 203115976 U CN203115976 U CN 203115976U CN 2013201288727 U CN2013201288727 U CN 2013201288727U CN 201320128872 U CN201320128872 U CN 201320128872U CN 203115976 U CN203115976 U CN 203115976U
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- heat exchange
- shaped tube
- coiled pipe
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Abstract
The utility model relates to a low-temperature coal economizer capable of reducing temperature of exhaust gas of a power station boiler and belongs to the field of boiler flue gas waste heat recovery and energy conservation. The low-temperature coal economizer comprises a heat exchange casing, a snake-shaped tube bundle, a water inlet header and a water outlet header, wherein the heat exchange casing is composed of a snake-shaped tube and a supporting plate, the supporting plate is arranged on the outer side of the snake-shaped tube, the snake-shaped tube is provided with a water inlet and a water outlet, the snake-shaped tube bundle is arranged in the heat exchange casing, the snake-shaped tube bundle is connected with the water inlet header through a water inlet connection pipe and connected with the water outlet header through a water outlet connection pipe, a connection pipe is arranged between the water outlet of the snake-shaped tube in the heat exchange casing and the water inlet header and the snake-shaped tube in the heat exchange casing and the snake-shaped tube bundle are in serial connection. Compared with the prior art, flue gas heat which is not utilized by a traditional low-temperature coal economizer can be utilized through the design of the casing with the snake-shaped tube. Thus, flue gas waste heat can be fully utilized, heat exchange capacity of unit volume in the coal economizer is enhanced, and the size of the coal economizer can be reduced under the same heat exchange amount.
Description
Technical field
The utility model belongs to residual heat from boiler fume and reclaims energy-saving field, specifically refers to a kind of low-level (stack-gas) economizer that can reduce the station boiler exhaust gas temperature.
Background technology
Along with the increase of people to the demand of electric power, the generating set of many power plant has carried out the increase-volume reconstruction, thereby has departed from the original design value, so the exhaust gas temperature of a lot of boilers all can raise, so not only influence generating efficiency and cycle efficieny, also can increase coal consumption amount; In addition, along with people to desulfurizing tower before the understanding of GGH (flue gas-flue gas heat exchange device) drawback, GGH has abandoned in increasing power plant, this has just caused the flue-gas temperature of coming out from deduster too high.In order to solve the too high problem of above-mentioned flue-gas temperature, a lot of power plant have all set up low-level (stack-gas) economizer in flue.
Traditional low-level (stack-gas) economizer only relies on inner snake-like tube row to carry out heat exchange, and housing does not have the ability that absorbs fume afterheat, so existence is abundant inadequately to the utilization of fume afterheat, and the shortcoming that the exchange capability of heat of unit volume is lower.
Summary of the invention
The purpose of this utility model is exactly at the problems referred to above, and a kind of low-level (stack-gas) economizer that can fully reduce flue-gas temperature is provided, and fume afterheat is utilized fully, solves the too high problem of flue-gas temperature.
For achieving the above object, technical solution of the present utility model is: a kind of low-level (stack-gas) economizer comprises heat exchange housing, snake-like tube row, water-inlet header, goes out water manifold; The heat exchange housing is made up of coiled pipe and gripper shoe, and gripper shoe is arranged on the coiled pipe outside, and coiled pipe is provided with a water inlet and a delivery port; Snake-like tube row is positioned at the heat exchange enclosure interior, and snake-like tube row links to each other with water-inlet header by the water inlet tube connector, by with the water outlet tube connector with go out water manifold and link to each other.
In the aforesaid low-level (stack-gas) economizer, the coiled pipe connecting mode on four faces on the heat exchange housing is series connection, and coiled pipe is connected with the mode of gripper shoe by welding.The gripper shoe of four faces links together by the mode of no seam welding, forms a rectangular configuration that the four sides is closed.
In the aforesaid low-level (stack-gas) economizer, adopt H type fin on the snake-like tube row, can effectively reduce the fouling phenomenon, can reduce pipe row's wearing and tearing simultaneously.
In the aforesaid low-level (stack-gas) economizer, the coiled pipe on the heat exchange housing can effectively reduce the generation of fouling for the light pipe with fin.
In the aforesaid low-level (stack-gas) economizer, in the heat exchange housing, between coiled pipe delivery port and the water-inlet header tube connector is installed, is made connecting mode between coiled pipe and the snake-like tube row for connecting.Water is the water inlet heat exchange housing by coiled pipe earlier, and then enters the water-inlet header of snake-like tube row by the delivery port of coiled pipe, enters out water manifold by snake-like tube row again.
In the aforesaid low-level (stack-gas) economizer, the heat exchange mode of current and flue gas is countercurrent flow in the snake-like tube row, makes average heat transfer temperature difference big, and the heat exchange amount is big.
In the aforesaid low-level (stack-gas) economizer, the coiled pipe on the heat exchange housing and the coiled pipe on the snake-like tube row all adopt the ND steel to form, and can effectively resist cold end corrosion and ash cutting.
Compared with prior art, the utility model is by the housing design of band coiled pipe, the flue gas heat that can utilize traditional low-level (stack-gas) economizer housing place to fail to utilize, take full advantage of fume afterheat, strengthen the exchange capability of heat of economizer in the unit volume, thereby under the situation of identical heat exchange amount, can save the volume of economizer.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is that the utility model is along the profile of A-A direction.
Fig. 3 is that the utility model is along the profile of B-B direction.
Fig. 4 is that the utility model is along the profile of C-C direction.
Among the figure: 1-water-inlet header, the 2-tube connector of intaking, the coiled pipe on the 3-heat exchange housing, the 4-gripper shoe, the coiled pipe on the 5-snake-like tube row, 6-H type fin, the 7-delivery port, 8-water outlet tube connector, 9-goes out water manifold, the 10-water inlet.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described further.
As Fig. 1, shown in Figure 2, the utility model comprises heat exchange housing, snake-like tube row, water-inlet header 1 and goes out water manifold 9.The heat exchange housing is made up of the coiled pipe 3 on the heat exchange housing and gripper shoe 4, and snake-like tube row is made up of the coiled pipe 5 on the snake-like tube row and H type fin 6.Water-inlet header 1 is connected by water inlet tube connector 2 with snake-like tube row, goes out water manifold 9 and is connected by water outlet tube connector 8 with snake-like tube row.Coiled pipe 3 on the heat exchange housing is connecting water inlet 10 and delivery port 7.Water enters coiled pipe 3 on the heat exchange housing by water inlet 10, advanced with flue gas heat exchange after, enter water-inlet header 1 by delivery port 7, enter coiled pipe 5 in the snake-like tube row by water inlet tube connector 2 then, under the enhanced heat exchange of H type fin 6, flow out snake-like tube row, enter out water manifold 9 by water outlet tube connector 8.The mode of snake-like tube row and flue gas heat exchange is reverse heat-exchange, so the flow direction of flue gas is served as reasons down upwards, such flue gas flow direction is unfavorable for fouling, can effectively guarantee the exchange capability of heat of snake-like tube row.
[0019] as Fig. 3, shown in Figure 4, H type fin 6 is arranged on the coiled pipe 5 on the snake-like tube row, owing to the characteristic of H type fin, significantly reduced the fouling of snake-like tube row, guaranteed the exchange capability of heat of coiled pipe effectively, strengthened the utilization to fume afterheat.The heat exchange housing is formed with gripper shoe 4 seal weldings by the coiled pipe 3 on the heat exchange housing, coiled pipe 3 on the heat exchange housing is the light pipe with fin, the fouling of heat exchange housing can be effectively reduced, effective heat exchange of the coiled pipe 3 on flue gas and the heat exchange housing can be guaranteed.Coiled pipe 3 on the heat exchange housing all adopts ND steel matter to be made with the coiled pipe 5 on the snake-like tube row, can resist the SO in the flue gas effectively
2Wearing and tearing Deng fly ash granule in the cold end corrosion of sour gas and the flue gas.
Claims (4)
1. low-level (stack-gas) economizer is characterized in that: heat exchange housing, snake-like tube row, water-inlet header, go out water manifold; The heat exchange housing is made up of coiled pipe and gripper shoe, and gripper shoe is arranged on the coiled pipe outside, and coiled pipe is provided with a water inlet and a delivery port; Snake-like tube row is positioned at the heat exchange enclosure interior, and snake-like tube row links to each other with water-inlet header by the water inlet tube connector, by with the water outlet tube connector with go out water manifold and link to each other.
2. low-level (stack-gas) economizer according to claim 1 is characterized in that: the coiled pipe connecting mode on four faces on the described heat exchange housing is series connection.
3. according to claim 1 or 2 described low-level (stack-gas) economizers, it is characterized in that: the coiled pipe on the heat exchange housing is the light pipe with fin.
4. low-level (stack-gas) economizer according to claim 1 is characterized in that: between coiled pipe delivery port and the water-inlet header tube connector is installed in the described heat exchange housing, is made connecting mode between coiled pipe and the snake-like tube row for connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201288727U CN203115976U (en) | 2013-03-21 | 2013-03-21 | Novel low-temperature coal economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201288727U CN203115976U (en) | 2013-03-21 | 2013-03-21 | Novel low-temperature coal economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203115976U true CN203115976U (en) | 2013-08-07 |
Family
ID=48896315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201288727U Expired - Lifetime CN203115976U (en) | 2013-03-21 | 2013-03-21 | Novel low-temperature coal economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203115976U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697456A (en) * | 2013-12-30 | 2014-04-02 | 江苏正通宏泰股份有限公司 | Finned tube low-pressure economizer system using boiler waste heat |
| CN109405597A (en) * | 2018-09-12 | 2019-03-01 | 盐城项远环保设备有限公司 | A kind of industrial high temperature exhaust gas cooling device |
-
2013
- 2013-03-21 CN CN2013201288727U patent/CN203115976U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697456A (en) * | 2013-12-30 | 2014-04-02 | 江苏正通宏泰股份有限公司 | Finned tube low-pressure economizer system using boiler waste heat |
| CN109405597A (en) * | 2018-09-12 | 2019-03-01 | 盐城项远环保设备有限公司 | A kind of industrial high temperature exhaust gas cooling device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 100020, AB, 8 floor, ocean Guanghua International Center, No. 10 Jin Tong West Road, Beijing, Chaoyang District Patentee after: CHINA POWER CONSERVATION AND ENVIRONMENTAL PROTECTION CO.,LTD. Address before: 100020, Beijing, Chaoyang District Tong Tong West Road No. 10 ocean Guanghua international AB block 8 Patentee before: CHINA POWER CONSTRUCTION & ENVIRONMETAL PROTECTION CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130807 |