CN209876890U - Combined coal economizer - Google Patents
Combined coal economizer Download PDFInfo
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- CN209876890U CN209876890U CN201822193160.9U CN201822193160U CN209876890U CN 209876890 U CN209876890 U CN 209876890U CN 201822193160 U CN201822193160 U CN 201822193160U CN 209876890 U CN209876890 U CN 209876890U
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Abstract
The utility model relates to a combined type economizer belongs to boiler waste heat recovery technical field. The coal economizer comprises a first coal economizer and a second coal economizer which are connected through a connecting flue; the first economizer and the second economizer respectively comprise a box body, an inlet header, an outlet header and an economizer pipe assembly, the outlet header is fixedly arranged above the box body, the inlet header is fixedly arranged below the box body, the economizer pipe assembly is arranged in the box body, and two ends of the first economizer pipe assembly are respectively communicated with the first inlet header and the first outlet header; two ends of the second economizer pipe assembly are respectively communicated with a second inlet header and a second outlet header; the first inlet header is in communication with the second outlet header such that the first economizer tube assembly and the second economizer tube assembly are connected in series. This application carries out twice heat exchange to high temperature flue gas, and the flue gas temperature reaches the requirement of discharging fume, has not only effectively reduced the exhaust fume temperature of boiler, and fuel saving realizes energy saving and emission reduction.
Description
Technical Field
The utility model relates to a combined type economizer belongs to boiler waste heat recovery technical field.
Background
The cast iron coal economizer is most commonly used in coal-fired steam boilers and coal-fired pressure-bearing hot water boilers in China, is arranged in a boiler rear flue system with the working pressure P less than or equal to 2.5MPa, and achieves the purpose of saving energy by absorbing heat in tail gas. The economizer is provided with a flue gas channel and a water supply channel, the flue gas channel of the existing economizer is generally formed by vertically and uniformly distributing a plurality of square fins on an economizer pipe, and a linear channel is formed among the fins. The reduction range of the boiler exhaust gas temperature is large, and the corresponding quantity of standard coal consumption which can be reduced is also considerable. The reduction of the exhaust gas temperature has very important practical significance for saving fuel and reducing pollution. Therefore, a new waste heat utilization technology needs to be found.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a combined economizer aiming at the prior art, which realizes the reduction of the exhaust gas temperature of the boiler and protects the environment; reducing coal consumption and saving fuel.
The utility model provides a technical scheme that above-mentioned problem adopted does: a combined economizer comprises a first economizer and a second economizer, wherein the first economizer and the second economizer are connected through a connecting flue, so that flue gas enters the first economizer and the second economizer;
the first economizer comprises a first box body, a first inlet header, a first outlet header and a first economizer pipe assembly, wherein the first outlet header is fixedly arranged above the first box body, the first inlet header is fixedly arranged below the first box body, the first economizer pipe assembly is arranged in the first box body, and two ends of the first economizer pipe assembly are respectively communicated with the first inlet header and the first outlet header; the first box body is communicated with the connecting flue;
the second economizer comprises a second box body, a second inlet header, a second outlet header and a second economizer pipe assembly, the second outlet header is fixedly arranged above the second box body, the second inlet header is fixedly arranged below the second box body, the second economizer pipe assembly is arranged in the second box body, and two ends of the second economizer pipe assembly are respectively communicated with the second inlet header and the second outlet header; the second box body is communicated with the connecting flue;
the first inlet header is in communication with the second outlet header such that the first economizer tube assembly and the second economizer tube assembly are connected in series.
The first economizer pipe assembly is composed of a plurality of serpentine pipe assemblies, and the plurality of serpentine pipe assemblies are arranged at intervals.
The second economizer pipe assembly comprises a plurality of second economizer pipes and a plurality of elbows, the second economizer pipes are arranged in the second box body, and the head end and the tail end of each adjacent second economizer pipe are connected through the elbows respectively.
And an ash cleaning door for cleaning ash is arranged on the connecting flue.
Compared with the prior art, the utility model has the advantages of: a box body of a first economizer and a box body of a second economizer are communicated through a connecting flue, a first economizer pipe assembly and a second economizer pipe assembly are connected in series, high-temperature smoke passes through the first economizer and the connecting flue from top to bottom and then flows to the second economizer, water flows into the second economizer pipe assembly and the first economizer pipe assembly from bottom to top, the high-temperature smoke in the first box body scours the pipe wall of the first economizer pipe assembly, primary heat exchange is carried out on the high-temperature smoke and the water, and the high-temperature smoke is cooled for the first time; the primary cooling flue gas enters the second box body through the connecting flue, erodes the pipe wall of the second economizer pipe assembly, carries out heat exchange with water for the second time, and carries out secondary cooling on the flue gas. After the high-temperature flue gas is subjected to heat exchange twice, the temperature of the flue gas meets the requirement of smoke exhaust, and the flue gas is heated by water and then is supplied to the next procedure for use. The exhaust gas temperature of the boiler is effectively reduced, the environment is protected, the fuel is saved, and the energy conservation and emission reduction are realized.
Drawings
Fig. 1 is a schematic view of a combined economizer according to an embodiment of the present invention;
fig. 2 is a side view of a combined economizer according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a first economizer in a combined economizer according to an embodiment of the present invention;
fig. 4 is a side view of a first economizer in a combined economizer according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a second economizer in the combined economizer according to the embodiment of the present invention;
fig. 6 is a side view of a second economizer in the combined economizer according to the embodiment of the present invention;
in the figure, 1 a first coal economizer, 1.1 a first box body, 1.2 a first outlet header, 1.3 a coiled pipe assembly I, 1.4 a coiled pipe assembly II, 1.5 a header fixing frame, 1.6 a first inlet header, 2 a second coal economizer, 2.1 a second box body, 2.2 a second outlet header, 2.3 elbows, 2.4 a second inlet header, 2.5 a second coal economizer pipe, 3 connecting flues and 4 ash cleaning doors are arranged.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 and 2, the combined economizer in this embodiment includes a first economizer 1 and a second economizer 2, the first economizer 1 and the second economizer 2 are arranged from top to bottom, and the first economizer 1 and the second economizer 2 are connected by a connecting flue 3, so that flue gas enters the first economizer 1 and then flows to the second economizer 2 through the connecting flue 3.
As shown in fig. 3 and 4, the first economizer 1 includes a first tank 1.1, a first inlet header 1.6, a first outlet header 1.2 and a first economizer pipe assembly, the upper part and the lower part of the first tank 1.1 are respectively and fixedly connected to a header fixing frame 1.5, the header fixing frame 1.5 is fixedly connected to the first outlet header 1.1 and the first inlet header 1.6, the first inlet header 1.6 is disposed at the lower part of the first tank 1.1, the first outlet header 1.2 is disposed at the upper part of the first tank 1.1, the first economizer pipe assembly is composed of a serpentine pipe assembly I1.3 and a serpentine pipe assembly II1.4, the two serpentine pipe assemblies are disposed in the first tank 1.1 at intervals, and two ends of the first economizer pipe assembly are respectively communicated with the first inlet header 1.6 and the first outlet header 1.2; the bottom of the first box body 1.1 is communicated with the connecting flue 3.
As shown in fig. 5 and 6, the second economizer 2 comprises a second tank 2.1, a second inlet header 2.4, a second outlet header 2.2 and a second economizer pipe assembly, wherein the upper part and the lower part of the second tank 2.1 are respectively and fixedly connected with a header fixing frame 1.5, the header fixing frame 1.5 is fixedly connected with the second outlet header 2.2 and the second inlet header 2.4, the second inlet header 2.4 is arranged at the lower part of the second tank 2.1, the second outlet header 2.2 is arranged at the upper part of the second tank 2.1, the second economizer pipe assembly comprises a plurality of second economizer pipes 2.5 and a plurality of elbows 2.3, the plurality of second economizer pipes 2.5 are arranged in the second tank 2.1 according to a certain arrangement sequence, the head-to-tail pipe ends of the adjacent second economizer pipes 2.5 are respectively connected through the elbows 2.3, the elbows 2.3 are horizontally arranged and connected or vertically arranged, a plurality of second economizer pipes 2.5 are communicated, and two ends of each second economizer pipe assembly are respectively communicated with a second inlet header 2.4 and a second outlet header 2.2; the top of the second box body 2.1 is communicated with the connecting flue 3.
The first inlet header 1.6 described above communicates with the second outlet header 2.2 so that the first and second economizer tube assemblies are connected in series.
A plurality of ash removal doors 4 are arranged on the connecting flue 3, so that ash accumulated in the connecting flue 3 can be conveniently removed.
The high-temperature flue gas is arranged on a boiler flue, the high-temperature flue gas flows to a second economizer 2 from top to bottom after passing through a first economizer 1 and a connecting flue 3, water flows to a second economizer pipe assembly and the first economizer pipe assembly from bottom to top, the high-temperature flue gas in a first box body 1.1 erodes the pipe wall of the first economizer pipe assembly, and the high-temperature flue gas and the water perform primary heat exchange to form primary cooling flue gas; the primary cooling flue gas enters the second box body 2.1 through the connecting flue 3, and the primary cooling flue gas scours the pipe wall of the second economizer pipe assembly and exchanges heat with water for the second time to form secondary cooling flue gas. After the high-temperature flue gas is subjected to heat exchange twice, the temperature of the flue gas meets the requirement of smoke exhaust, and water is subjected to secondary heat exchange and then is supplied to the next working procedure for use. The device effectively lowers the exhaust gas temperature of the boiler, protects the environment and saves fuel.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (4)
1. A combined type coal economizer is characterized in that: the flue gas recovery device comprises a first coal economizer (1) and a second coal economizer (2), wherein the first coal economizer (1) is connected with the second coal economizer (2) through a connecting flue (3), so that flue gas can enter the second coal economizer (2) from the first coal economizer (1);
the first economizer (1) comprises a first box body (1.1), a first inlet header (1.6), a first outlet header (1.2) and a first economizer pipe assembly, wherein the first outlet header (1.2) is fixedly arranged above the first box body (1.1), the first inlet header (1.6) is fixedly arranged below the first box body (1.1), the first economizer pipe assembly is arranged in the first box body (1.1), and two ends of the first economizer pipe assembly are respectively communicated with the first inlet header (1.6) and the first outlet header (1.2); the first box body (1.1) is communicated with the connecting flue (3);
the second economizer (2) comprises a second box body (2.1), a second inlet header (2.4), a second outlet header (2.2) and a second economizer pipe assembly, the second outlet header (2.2) is fixedly arranged above the second box body (2.1), the second inlet header (2.4) is fixedly arranged below the second box body (2.1), the second economizer pipe assembly is arranged in the second box body (2.1), and two ends of the second economizer pipe assembly are respectively communicated with the second inlet header (2.4) and the second outlet header (2.2); the second box body (2.1) is communicated with the connecting flue (3);
the first inlet header (1.6) is in communication with the second outlet header (2.2) such that the first and second economizer tube assemblies are connected in series.
2. The combined economizer of claim 1 wherein: the first economizer pipe assembly is composed of a plurality of serpentine pipe assemblies, and the plurality of serpentine pipe assemblies are arranged at intervals.
3. The combined economizer of claim 1 wherein: the second economizer pipe assembly comprises a plurality of second economizer pipes (2.5) and a plurality of elbows (2.3), the plurality of second economizer pipes (2.5) are arranged in the second box body (2.1), and the head end and the tail end of each second economizer pipe (2.5) are connected through the elbows (2.3).
4. The combined economizer of claim 1 wherein: and an ash cleaning door (4) for cleaning ash is arranged on the connecting flue (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822193160.9U CN209876890U (en) | 2018-12-26 | 2018-12-26 | Combined coal economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822193160.9U CN209876890U (en) | 2018-12-26 | 2018-12-26 | Combined coal economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209876890U true CN209876890U (en) | 2019-12-31 |
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ID=68949653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822193160.9U Active CN209876890U (en) | 2018-12-26 | 2018-12-26 | Combined coal economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209876890U (en) |
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2018
- 2018-12-26 CN CN201822193160.9U patent/CN209876890U/en active Active
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