CN203147732U - An enamel plate economizer - Google Patents

Abstract

An enamel plate type economizer comprises a flue gas interface flange, a circulating water interface flange, a heat transfer core body, a clamping bolt and nut assembly and a pressing plate, wherein the flue gas interface flange and the circulating water interface flange are respectively connected with the heat transfer core body in a welding mode; the heat transfer core is clamped by a compression plate and a clamping bolt and nut assembly. The heat transfer core is a full-welded plate type heat transfer core, and is formed by welding plate tubes and distance bars. The plate and the tube are welded into a whole by a plate, a plate and tube seal and a baffle in the plate and the tube, and the outer surface of the plate and the tube is treated by enamel. The distance bars are 8-12 square steel and made of carbon steel, and the surface of each distance bar is subjected to enamel treatment. The utility model discloses heat transfer efficiency is high, the flow resistance is low, compact structure, resistant dew point corrosion.

Description

An enamel plate economizer

technical field

The utility model belongs to the field of flue gas waste heat recovery devices, and relates to a boiler economizer.

Background technique

The economizer is a heat exchange device in the tail flue of the boiler that uses flue gas to heat the boiler feed water. The economizer can absorb the heat of the flue gas with a relatively low temperature, reduce the exhaust temperature of the flue gas, save energy, and improve the thermal efficiency of the boiler.

Economizers are widely used in various boilers and flue gas waste heat recovery equipment at the tail of combustion furnaces. The traditional economizer structure is mainly finned tube type, and there are many problems:

1. Low heat transfer efficiency, small compactness, huge equipment and heavy weight;

2. The finned tube economizer is easy to accumulate ash and difficult to remove ash;

3. Poor dew point corrosion resistance and short service life. If the material resistant to dew point corrosion is selected, the cost is too high.

Contents of the invention

The purpose of this utility model is to provide an enamel plate type economizer in order to overcome the problems existing in the prior art.

An enamel plate economizer of the utility model comprises a flue gas interface flange, a circulating water interface flange, a heat transfer core, a clamping bolt and nut assembly, a pressing plate, and the flue gas interface flange, circulating water The interface flanges are respectively connected to the heat transfer core by welding; the heat transfer core is clamped by a compression plate and a clamping bolt and nut assembly.

The heat transfer core is an all-welded plate heat transfer core, which is formed by welding plate tubes and spacer bars.

The plate tube is welded together by the plate, the plate tube seal, and the deflector inside the plate tube, and the outer surface of the plate tube is enamel-treated.

The distance strips are 8-12 square steel, made of carbon steel, and treated with enamel on the surface.

Compared with the prior art, the utility model has the following advantages: high heat transfer efficiency, low flow resistance, compact structure, and dew point corrosion resistance.

Description of drawings

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in detail.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the structure of the heat transfer core of the present invention.

Fig. 3 is a schematic diagram of the plate tube structure of the utility model.

Fig. 4 is a schematic diagram of the flow in the plate tube of the utility model.

In the picture:

1 - Flue gas connection flange                 2 - Circulating water connection flange

3 - Heat Transfer Core 4 - Clamping Bolt and Nut Assembly

5 – Compression plate 6 – Spacer bar

7 - Plate tube 8 - Plate tube seal

9 – plate

11 - Flue gas inlet 12 - Flue gas outlet

13 - Circulating water inlet 14 - Circulating water outlet.

Detailed ways

An enamel plate economizer as shown in Figure 1, including flue gas interface flange 1, circulating water interface flange 2, heat transfer core 3, clamping bolt and nut assembly 4, compression plate 5, flue gas interface The flange 1 and the circulating water interface flange 2 are respectively connected to the heat transfer core 3 by welding; the heat transfer core 3 is clamped by the compression plate 5 and the clamping bolt and nut assembly 4 .

The heat transfer core 3 shown in FIG. 2 is an all-welded plate heat transfer core, and the heat transfer core 3 is welded by plate tubes 7 and distance strips 6 .

The plate tube 7 shown in Fig. 3 is welded together by the plate 9, the plate tube seal 8, and the plate tube inner baffle 10, and the outer surface of the plate tube is enamelled. Spacer bar 6 is 8～12 square steel, and material is carbon steel, and surface enamel treatment.

Spacer strips 6 form chambers between the plate tubes 7, that is, the shell-side flow channel, and the inner cavity of the plate tube 7 forms an S-shaped flow channel, that is, the plate-side flow channel through the baffle strips 10 in the plate tube. The flue gas goes through the shell-side flow channel, and the circulating water goes through the plate-side tube-side flow channel. Reduce the cross-sectional area of the circulating water side, increase the flow rate, and enhance the heat transfer efficiency. Because the wall surface of the runner has been treated with enamel, the surface is smooth, it is not easy to accumulate dust, and it is convenient to remove dust. As shown in Figure 4, the flue gas enters the shell-side flow channel of the heat transfer core 3 from the flue gas inlet 11, passes through the flow channel from bottom to top, and flows out from the flue gas outlet 12; the circulating water flows into the heat transfer core through the circulating water inlet 13 3, the plate tube side flow channel passes through the flow channel from top to bottom, and flows out from the circulating water outlet 14. The flow direction between the flue gas and the circulating water forms a countercurrent form.

Claims (4)

1. An enamel plate economizer, including a flue gas interface flange (1), a circulating water interface flange (2), a heat transfer core (3), a clamping bolt and nut assembly (4), and a compression plate ( 5), characterized in that: the flue gas interface flange (1) and the circulating water interface flange (2) are respectively connected to the heat transfer core (3) by welding; the heat transfer core (3) passes through the compression plate (5) and the clamping bolt nut assembly (4) are clamped. 2. An enamel plate economizer according to claim 1, characterized in that: the heat transfer core (3) is a fully welded plate heat transfer core, and the heat transfer core (3) is made of plate tubes ( 7), the distance bar (6) is welded together. 3. An enamel plate-type economizer as claimed in claim 2, characterized in that: the plate tube (7) consists of a plate (9), a plate tube seal (8), a plate tube inner baffle (10) It is welded together, and the outer surface of the plate tube is enamel-treated. 4. An enamel plate-type economizer as claimed in claim 2, characterized in that: said distance strips (6) are 8-12 square steel made of carbon steel and treated with enamel.

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