CN108613584A - A kind of single row type flue gas waste heat recovery apparatus - Google Patents

Abstract

The invention discloses a single-row flue gas waste heat recovery device. The device includes a shell, and more than two gas-liquid heat exchangers are arranged in the shell, and the gas-liquid heat exchangers are arranged in a row horizontally. The gas-liquid heat exchanger includes a front baffle, a rear baffle and more than two plates , the front baffle is provided with a water inlet pipe and a water outlet pipe; the plates are set between the front baffle and the rear baffle, and there are convex points on the plates, and the plates are in groups of two, and the convex points on each group of plates Set opposite to each other, a water channel is formed between the two plates of each group of plates, and the water channel communicates with the water inlet pipe and the water outlet pipe. The smoke passage, the water inlet pipe is connected with the water inlet main pipe, and the water outlet pipe is connected with the water outlet main pipe. The invention is convenient to be installed on the flue of a boiler or other combustion equipment, has little influence on the fluidity of the flue gas, does not affect the smoke exhaust, has a high recovery rate of waste heat in the flue, and has a remarkable energy-saving effect.

Description

A single row flue gas waste heat recovery device

technical field

The invention relates to the field of heat recovery devices, in particular to a single-row flue gas waste heat recovery device.

Background technique

In the past ten years, due to the shortage of energy sources, with the further development of energy conservation work. A variety of new, energy-saving and advanced furnace types are becoming more and more perfect, and the use of high-quality insulation materials such as new refractory fibers has significantly reduced the heat dissipation loss of the furnace. The advanced combustion device is used to strengthen the combustion, reduce the amount of incomplete combustion, and the air-fuel ratio tends to be reasonable. However, the technology of reducing the heat loss of flue gas and recovering the waste heat of flue gas is still not progressing fast. In order to further improve the thermal efficiency of the kiln and achieve the purpose of saving energy and reducing consumption, recycling flue gas waste heat is also an important way to save energy.

Flue gas is the main way for general energy-consuming equipment to waste energy. For example, the energy consumption of boiler smoke exhaust is about 15%, while other equipment such as setting machines, dryers and kilns in the printing and dyeing industry mainly consume energy through flue gas discharge. . Flue gas waste heat recovery is mainly to convert the heat carried by the flue gas into usable heat through a certain heat exchange method.

Contents of the invention

The object of the present invention is to provide a single-row flue gas waste heat recovery device for the deficiencies in the prior art.

In order to achieve the above object, the present invention provides a single-row flue gas waste heat recovery device, which includes a casing, and more than two gas-liquid heat exchangers are arranged in the casing, and the gas-liquid heat exchangers are horizontally arranged as a row, the gas-liquid heat exchanger includes a front baffle, a rear baffle and more than two plates, and the front baffle is provided with a water inlet pipe and a water outlet pipe; the plates are arranged on the front baffle and the rear baffle. Between them, there are protruding points on the plates, and the plates are in groups of two. Both the water pipe and the water outlet pipe are connected, the convex points of two adjacent groups of plates are in contact, and a smoke channel is formed between the adjacent two groups of plates, the water inlet pipe is connected with the water inlet main pipe, and the water outlet pipe is connected with the water outlet main pipe.

Preferably, the housing includes a middle shell and adapter sleeves connected to both sides of the middle shell, and the gas-liquid heat exchanger is arranged in the middle shell.

Preferably, one side of the middle shell is provided with an opening, and a bracket is provided inside it, the gas-liquid heat exchanger is arranged on the bracket, and the water inlet main pipe and the water outlet main pipe are both arranged outside the shell, The opening is bolted to a fixing plate, and the fixing plate is provided with a plurality of through holes, and the water inlet pipe and the water outlet pipe respectively pass through a through hole and are fixed to the fixing plate.

Preferably, the bracket is welded by L-shaped angle iron.

Preferably, the water inlet pipe and the water outlet pipe are provided with an external thread structure, the outer sides of which are threaded with a first nut and a second nut, and the first nut and the second nut are respectively arranged on the inner and outer sides of the fixing plate.

Preferably, the second nut is a polytetrafluoroethylene nut.

Preferably, the shape of the front baffle, the rear baffle and the plates are all rectangular, and the liquid inlet and outlet are respectively arranged at a group of diagonal corners of the front baffle and the plates.

Preferably, the middle shell is in the shape of a cube, one end of the adapter sleeve connected to the middle shell is in the shape of a rectangle, and the other end of the adapter sleeve is in the shape of a circle and is connected with a flange.

Beneficial effects: the invention is easy to be installed on the flue of boilers or other combustion equipment, has little influence on the fluidity of flue gas, does not affect smoke exhaust, has a high recovery rate of waste heat in the flue, and has a remarkable energy-saving effect.

Description of drawings

Fig. 1 is a schematic bottom view of a single row flue gas waste heat recovery device provided by an embodiment of the present invention;

Fig. 2 is a side view structural schematic diagram of a casing provided by an embodiment of the present invention;

Fig. 3 is a schematic bottom view of the gas-liquid heat exchanger provided by the embodiment of the present invention.

Detailed ways

The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in Figures 1 to 3, the embodiment of the present invention provides a single-row flue gas waste heat recovery device, which is connected to the boiler flue and includes a housing 1, which is provided with more than two gas The number of liquid heat exchangers 2 is generally set to 2 to 5, which can be adjusted according to actual needs. The gas-liquid heat exchangers 2 are horizontally arranged in a row. The gas-liquid heat exchanger used in the embodiment of the present invention can be various in the prior art, and the preferred gas-liquid heat exchanger includes a front baffle 21, a rear baffle 22 and more than two plates 23, and the front baffle 21 is provided with water inlet pipe 24 and water outlet pipe 25. The plates 23 are arranged between the front baffle 21 and the rear baffle 22, the plates 23 are provided with bumps 26, the plates 23 are in groups of two, and the bumps 26 on each group of plates 23 are arranged opposite to each other. A water channel 27 is formed between the two plates 23 of each group of plates 23, and the water channel 27 communicates with the water inlet pipe 24 and the water outlet pipe 25. A smoke channel 28 is formed between the sheets 23 , the water inlet pipe 24 is connected with the water inlet main pipe 5 , and the water outlet pipe 25 is connected with the water outlet main pipe 6 .

The bump 26 of the embodiment of the present invention is punched by the plate 23, preferably in the shape of an ellipse, the shape of the front baffle 21, the rear baffle 22 and the plate 23 are all rectangular, the liquid inlet pipe 24 and the liquid outlet pipe 25 They are arranged at a group of diagonal corners of the front baffle 21 and the sheet 23 respectively. The height of the bumps 26 is 2 to 4 cm, preferably 3 cm. The front baffle 21 , the rear baffle 22 and the plates 23 are all provided with a nickel-chromium layer; the thickness of the nickel-chromium layer is 10 to 30 μm, preferably 20 μm.

The housing 1 of the embodiment of the present invention includes a middle shell 11 and adapter sleeves 12 connected to both sides of the middle shell, and the gas-liquid heat exchanger 2 is arranged in the middle shell 11 . One side of the middle shell 11 is provided with an opening 3, and a support 4 is provided inside the middle shell 11, and the support 4 is preferably welded by L-shaped angle iron. During installation, the gas-liquid heat exchanger 2 can be put into the middle shell 11 through the opening 3 and arranged on the bracket 4 . The water inlet main pipe 5 and the water outlet main pipe 6 can be arranged on the inner side of the housing 1, and then one end passes through the housing 1 and protrudes outside the housing 1. Preferably, the water inlet main pipe 5 and the water outlet main pipe 6 are arranged outside the housing 1 . In order to make the gas-liquid heat exchanger 2 stably arranged in the middle shell 11, preferably a fixing plate 7 is bolted to the opening 3, and a plurality of through holes are arranged on the fixing plate 7, and each gas-liquid heat exchanger 2 The water inlet pipe 24 and the water outlet pipe 25 pass through a through hole respectively and are fixed with the fixed plate 7. The fixing method with the fixed plate 7 is preferably fixed with a nut, and the water inlet pipe 24 and the water outlet pipe 25 are provided with an external thread structure, and the first nut 8 and the second nut 9 are all threaded on the outside of the water inlet pipe 24 and the water outlet pipe 25, The first nut 8 and the second nut 9 are respectively arranged on the inner and outer sides of the fixing plate 7 . In this way, after the first nut 8 and the second nut 9 are tightened together, the gas-liquid heat exchanger 2 and the fixing plate 7 can be fixed. In order to prevent smoke from leaking from the through hole, the second nut 9 is preferably a polytetrafluoroethylene nut, and other nuts with better sealing performance after fixing can also be used. It should be noted that since the temperature resistance of polytetrafluoroethylene is about 250°, and the flue gas temperature of some special-purpose boilers is higher than 250°, the second nut 9 cannot use polytetrafluoroethylene nuts, and metal nuts can be used Cooperate with lead pad or asbestos pad to seal.

In order to improve the recycling rate of flue gas waste heat, it is preferable to set the middle shell 11 into a cube shape, and make the cross-sectional shape of the middle shell 11 the same as that of the two exhaust liquid heat exchangers 2, and under the action of the bracket 4, it can Make the flue gas pass through the flue channel 28 as much as possible, so that the recycling efficiency is higher. One end of the adapter sleeve 12 connected to the middle shell 11 is also rectangular, and the other end of the adapter sleeve 12 is round and connected with a flange 10 for connecting with the flue of the boiler.

When working, water enters the water inlet pipe 24 of each gas-liquid heat exchanger 2 from the water inlet main pipe 5, and exchanges heat with the flue gas after passing through the water channel 27 of the gas-liquid heat exchanger 2, so that the temperature of the discharged flue gas is reduced. And make the temperature of water rise, then realize heat recycling, after water is discharged from water outlet pipe 25, can go to the occasion that needs hot water.

In summary, the present invention is easy to be installed on the flue of boilers or other combustion equipment, has little influence on the fluidity of flue gas, does not affect smoke exhaust, has a high recovery rate of waste heat in the flue, and has a significant energy-saving effect.

The above descriptions are only preferred implementations of the present invention, and it should be pointed out that for those of ordinary skill in the art, other parts not specifically described belong to the prior art or common knowledge. On the premise of not departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (8)

1. a kind of single row type flue gas waste heat recovery apparatus, which is characterized in that be equipped with including shell, in the shell more than two Gas-liquid heat exchanger, the gas-liquid heat exchanger are horizontally disposed in a row, and the gas-liquid heat exchanger includes front apron, rear baffle and two Above plate, front apron are equipped with water inlet pipe and outlet pipe；The plate is located between front apron and rear baffle, is set on plate There is salient point, in pairs, the upper salient point of every group of plate is disposed opposite to each other plate, and it is logical that water is formed between two plates of every group of plate Road, the aquaporin are communicated with water inlet pipe, outlet pipe, and the salient point of two adjacent groups plate is in contact, between two adjacent groups plate Cigarette channel is formed, the water inlet pipe is connect with water inlet manifold, and the outlet pipe is connect with outfall sewer.

2. single row type flue gas waste heat recovery apparatus according to claim 1, which is characterized in that the shell include middle shell and It is connected to the reducing sleeve of middle shell both sides, the gas-liquid heat exchanger is arranged in the middle shell.

3. single row type flue gas waste heat recovery apparatus according to claim 2, which is characterized in that the middle shell side is equipped with and opens Mouthful, inside is equipped with holder, and on the bracket, the water inlet manifold is respectively provided with outfall sewer for the gas-liquid heat exchanger setting In the hull outside, the opening has been bolted a fixed plate, and the fixed plate is equipped with multiple through-holes, the water inlet Pipe is each passed through with outlet pipe after a through-hole to be fixed with fixed plate.

4. single row type flue gas waste heat recovery apparatus according to claim 3, which is characterized in that the holder is by L-type angle bar It is welded.

5. single row type flue gas waste heat recovery apparatus according to claim 3, which is characterized in that the water inlet pipe and outlet pipe Equipped with external thread structure, outside is threadedly coupled the first nut and the second nut, and first nut and the second nut are distinguished It is arranged inside and outside fixed plate.

6. single row type flue gas waste heat recovery apparatus according to claim 5, which is characterized in that second nut is poly- four Vinyl fluoride nut.

7. single row type flue gas waste heat recovery apparatus according to claim 1, which is characterized in that the front apron, rear baffle Shape with plate is rectangle, and inlet and liquid outlet are respectively provided at one group of diagonal angle of front apron and plate.

8. single row type flue gas waste heat recovery apparatus according to claim 7, which is characterized in that the middle shell is in cube Shape, one end that the reducing sleeve is connect with middle shell is rectangular, and the other end of the reducing sleeve is in rounded shape, and is connected with method It is blue.