CN210070633U - Waste heat recovery system in ceramsite production - Google Patents

Abstract

The utility model provides a waste heat recovery system in haydite production, which comprises a drying machine, rotary kiln and cooler, the drying machine passes through the drying-machine fan and is connected with high-efficient air heat exchanger, be provided with air inlet on the high-efficient air heat exchanger, the air outlet, flue gas air inlet and flue gas outlet, air inlet passes through the connecting pipe and is connected with the heat exchanger fan, the air outlet passes through the connecting pipe and is connected with drying fan, the flue gas air inlet passes through the connecting pipe and is connected with the exhaust port of rotary kiln and cooler respectively, the air inlet of cooler passes through the connecting pipe and is connected with cooling fan, the inside heat exchange tube that is provided with snakelike distribution of high-efficient air heat exchanger, utilize the flue gas waste heat heating clean air of rotary kiln, reuse air after the heating material of drying.

Description

A waste heat recovery system in ceramsite production

technical field

The utility model relates to the technical field of environmental protection equipment, in particular to a waste heat recovery system in the production of ceramsite.

Background technique

In recent years, the utilization of various solid wastes such as sludge, fly ash, etc. is more inclined to firing ceramsite, because ceramsite can completely achieve solid waste reduction and harmless disposal, but the flue gas during the firing process of ceramsite is The composition is complex and contains a lot of harmful substances, and the temperature of a large amount of flue gas can reach more than 1000°. Direct discharge will not only cause pollution, but also cause waste of energy. The heat in it can be recycled and used for drying materials, but high-temperature flue gas The harmful gases and substances in it are easy to cause pollution hazards to other materials, and cannot be directly used for material drying. Therefore, the remaining heat cannot be effectively recovered, which is a common problem at present, resulting in increased energy waste and cost.

SUMMARY OF THE INVENTION

The purpose of the utility model is to provide a waste heat recovery system in the production of ceramsite, which utilizes the waste heat of the flue gas of the rotary kiln to heat clean air, and then uses the heated air to dry the material, which not only saves another heat source for drying the material, but also The flue gas temperature of the rotary kiln is reduced. After thermal balance calculation, a suitable heat exchanger can be selected to reduce the flue gas temperature to below 100°, and it can be directly fed into the flue gas treatment system for desulfurization and denitrification treatment without separate cooling.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a waste heat recovery system in the production of ceramsite includes a dryer, a rotary kiln and a cooler, and the dryer passes through the dryer fan and high-efficiency air. The heat exchanger is connected, and the high-efficiency air heat exchanger is provided with an air inlet, an air outlet, a smoke inlet and a smoke outlet, and the air inlet is connected to the heat exchanger through a connecting pipe The air outlet is connected with the drying fan through the connecting pipe, and the flue gas inlet is connected with the exhaust port of the rotary kiln and the exhaust port of the cooling machine respectively through the connecting pipe. The air inlet of the machine is connected with the cooling fan through a connecting pipe, and the inside of the high-efficiency air heat exchanger is provided with serpentine heat exchange pipes.

As an optimization, the high-efficiency air heat exchanger is a square sealed box with different tuyere on the four sides of the box, and serpentine heat exchange tubes are arranged inside the box. The end communicates with the air inlet and the air outlet.

As an optimization, the high-efficiency air heat exchanger is a square sealed box, with different air outlets on the four sides of the box, and serpentine heat exchange tubes are arranged inside the box. The box is connected to the heat exchanger. The space between the heat pipes is communicated with the flue gas inlet and the flue gas outlet.

As an optimization, one end of the heat exchange fan is connected to the air inlet through a connecting pipe, and the other end is connected to the outside air through a connecting pipe.

As an optimization, one end of the drying fan is communicated with the air outlet through a connecting pipe, and the other end is communicated with the dryer through a connecting pipe.

As an optimization, the rotary kiln is provided with a smoke exhaust port, and the smoke exhaust port is connected with the flue gas inlet through a connecting pipe.

As an optimization, the outlet of the dryer is connected to the inlet of the rotary kiln.

As an optimization, the outlet of the rotary kiln is connected to the inlet of the cooler.

The beneficial effects of the utility model are: compared with the prior art, a waste heat recovery system in the production of ceramsite of the present utility model, by adding a high-efficiency air heat exchanger to the system for the recovery and treatment of flue gas, through the high-efficiency air exchange The heater heats the air with the high-temperature flue gas discharged from the rotary kiln and the hot air discharged from the cooler, and converts the heat into the air. The high-temperature air from the high-efficiency air heat exchanger directly dries the materials in the dryer. , the dried material enters the rotary kiln for firing. In the ceramsite production line, the high-temperature gas generated by each equipment is heat-exchanged in the high-efficiency air heat exchanger, and the low-temperature air is heated to achieve high-temperature flue gas. Heat recovery and cooling, saving energy and reducing consumption, reducing energy waste, and saving production costs, the low-temperature flue gas after heat exchange can directly enter the flue gas treatment system for flue gas treatment, no further cooling is required, cooling steps are reduced, and costs are reduced .

Description of drawings

Fig. 1 is the overall structure diagram of the utility model;

2 is an enlarged view of the structure of the high-efficiency air heat exchanger of the present invention;

Among them, 1 dryer, 2 rotary kiln, 3 cooler, 4 high efficiency heat exchanger, 5 heat exchanger fan, 6 drying fan, 7 cooling fan, 8 air inlet, 9 air outlet, 10 flue gas Air inlet, 11 flue gas outlet, 12 heat exchange tube.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner" and "outer" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that is usually placed when the utility model product is used, only for the convenience of describing the present utility model and simplifying the description, not Indicates or implies that the referred device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

In the embodiment shown in FIG. 1 , a waste heat recovery system in the production of ceramsite includes a dryer 1, a rotary kiln 2 and a cooler 3. The dryer 1 passes through the dryer fan 6 and high-efficiency air The heat exchanger 4 is connected, and the high-efficiency air heat exchanger 4 is provided with an air inlet 8, an air outlet 9, a smoke inlet 10 and a smoke outlet 11. The air inlet 8 The air outlet 9 is connected to the drying fan 6 through the connecting pipe, and the flue gas inlet 10 is connected to the exhaust port and the exhaust port of the rotary kiln 2 through the connecting pipe, respectively. The exhaust port of the cooler 3 is connected, the air inlet of the cooler 3 is connected to the cooling fan 7 through a connecting pipe, and the high-efficiency air heat exchanger 4 is provided with heat exchange pipes 12 distributed in a serpentine shape.

In Figure 1, the ceramsite needs to be dried to meet the production requirements. High-temperature drying gas is introduced into the air inlet of the dryer to dry the material, and the air inlet of the dryer is connected to In the high-efficiency air heat exchanger, in the heat exchange tube set inside the high-efficiency air heat exchanger, the low-temperature air is introduced through the heat exchange fan, and the low-temperature air enters the serpentine heat exchange tube, which is set in a square seal. Inside the box body of the high-efficiency air heat exchanger, the low-temperature air circulates continuously inside the serpentine heat exchange tube. The other two vents in the high-efficiency air heat exchanger are the flue gas intake ports where the high-temperature flue gas enters. The high-temperature hot gas entering the air inlet continuously circulates between the box and the heat exchange tube, and transfers the heat in the flue gas to the low-temperature air inside the heat exchange tube. After heat exchange, the low-temperature flue gas is discharged through the flue gas outlet. .

The high-efficiency air heat exchanger 4 is a square sealed box body, different air outlets are respectively set on the four sides of the box body, and serpentine heat exchange tubes 12 are arranged inside the box body. The end communicates with the air inlet 8 and the air outlet 9 .

The high-efficiency air heat exchanger 4 is a square sealed box with different air outlets on four sides of the box, and serpentine heat exchange tubes 12 are arranged inside the box. The space between the tubes communicates with the flue gas inlet 10 and the flue gas outlet 11 .

In the embodiment shown in FIG. 2 , the high-efficiency air heat exchanger is a square sealed box, and air outlets are respectively provided on the four sides of the sealed box, and the opposite group is the air inlet and the air outlet, which are air The other opposite group is the flue gas inlet and the flue gas outlet, which is the flue gas circulation. There are multiple sets of heat exchange tubes inside the sealed box, and each set of heat exchange tubes is provided with one inlet and one heat exchange tube. The outlet, the inlet and the air inlet are communicated, and the outlet is communicated with the air outlet. One set of heat exchange tubes is arranged in a row, and multiple sets of heat exchange tubes are installed in the box in parallel and at uniform intervals. The heat exchange tubes are serpentine structures. The air flows continuously inside the heat exchange tube, which increases the contact area between the air and the pipeline and improves the heat exchange efficiency.

One end of the heat exchange fan 5 is connected with the air inlet 8 through a connecting pipe, and the other end is communicated with the outside air through a connecting pipe.

One end of the drying fan 6 is communicated with the air outlet 9 through a connecting pipe, and the other end is communicated with the dryer 1 through a connecting pipe.

The rotary kiln 2 is provided with a smoke exhaust port, and the smoke exhaust port is connected with the flue gas inlet 10 through a connecting pipe.

The outlet of the dryer 1 is connected to the inlet of the rotary kiln 2 .

The outlet of the rotary kiln 2 is connected to the inlet of the cooler 3 .

By adding a high-efficiency air heat exchanger to the system of flue gas recovery and treatment, the high-temperature flue gas discharged from the rotary kiln and the hot air discharged from the cooler are heated by the high-efficiency air heat exchanger, and the heat is converted to the air, from the high-efficiency air The high-temperature air from the heat exchanger directly dries the materials in the dryer, and the dried materials enter the rotary kiln for firing. In the ceramsite production line, the high-temperature gas generated by each equipment is Heat exchange in the high-efficiency air heat exchanger, heating the low-temperature air, realizing the recovery and cooling of the high-temperature flue gas heat, saving energy and reducing consumption, reducing energy waste, and saving production costs, and the low-temperature flue gas after heat exchange can directly enter the flue gas The treatment system performs flue gas treatment without cooling, reducing cooling steps and reducing costs.

In another embodiment, each group of heat exchange tubes in the high-efficiency air heat exchanger is provided with flue gas guide plates vertically distributed with the heat exchange tubes, and the flue gas guide plates and the heat exchange tubes of each layer are perpendicular to each other It is installed so that the plane formed by the flow of air and the plane formed by the flow of flue gas are perpendicular to each other. The flue gas guide plate improves the flow of flue gas inside the box and increases the flow of flue gas and heat exchange tubes. The heat exchange area between them increases the heat exchange efficiency.

The above-mentioned specific embodiments are only specific cases of the present utility model, and the scope of patent protection of the present utility model includes, but is not limited to, the product forms and styles of the above-mentioned specific embodiments, any common technology in the technical field that conforms to the claims of the present utility model. Appropriate changes or modifications made by personnel shall fall within the scope of patent protection of the present invention.

Claims (8)

1. The utility model provides a waste heat recovery system in haydite production, includes drying-machine (1), rotary kiln (2) and cooler (3), its characterized in that: dryer (1) be connected with high-efficient air heat exchanger (4) through drying fan (6), high-efficient air heat exchanger (4) on be provided with air inlet (8), air outlet (9), flue gas air inlet (10) and flue gas outlet (11), air inlet (8) be connected with heat exchanger fan (5) through the connecting pipe, air gas outlet (9) be connected with drying fan (6) through the connecting pipe, flue gas air inlet (10) be connected with the exhaust port of discharge fume port and cooler (3) of rotary kiln (2) respectively through the connecting pipe, the air inlet of cooler (3) be connected with cooling fan (7) through the connecting pipe, high-efficient air heat exchanger (4) inside be provided with snakelike heat exchange tube (12) that distribute.

2. The waste heat recovery system in ceramsite production according to claim 1, wherein the waste heat recovery system comprises: the high-efficiency air heat exchanger (4) is a square sealed box body, different air ports are respectively arranged on four sides of the box body, the box body is internally provided with a heat exchange tube (12) distributed in a snake shape, and two ends of the heat exchange tube (12) are communicated with an air inlet (8) and an air outlet (9).

3. The waste heat recovery system in ceramsite production according to claim 1, wherein the waste heat recovery system comprises: the high-efficiency air heat exchanger (4) is a square sealed box body, different air ports are respectively arranged on four sides of the box body, the box body is internally provided with a heat exchange tube (12) which is distributed in a snake shape, and the space between the box body and the heat exchange tube is communicated with a flue gas inlet (10) and a flue gas outlet (11).

4. The waste heat recovery system in ceramsite production according to claim 1, wherein the waste heat recovery system comprises: one end of the heat exchanger fan (5) is connected with the air inlet (8) through a connecting pipe, and the other end of the heat exchanger fan is communicated with the outside air through a connecting pipe.

5. The waste heat recovery system in ceramsite production according to claim 1, wherein the waste heat recovery system comprises: one end of the drying fan (6) is communicated with the air outlet (9) through a connecting pipe, and the other end of the drying fan is communicated with the dryer (1) through a connecting pipe.

6. The waste heat recovery system in ceramsite production according to claim 1, wherein the waste heat recovery system comprises: the rotary kiln (2) is provided with a smoke outlet, and the smoke outlet is connected with a smoke inlet (10) through a connecting pipe.

7. The waste heat recovery system in ceramsite production according to claim 1, wherein the waste heat recovery system comprises: the discharge hole of the dryer (1) is connected with the feed inlet of the rotary kiln (2).

8. The waste heat recovery system in ceramsite production according to claim 1, wherein the waste heat recovery system comprises: the discharge hole of the rotary kiln (2) is connected with the feed inlet of the cooler (3).

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