Waste heat recovery cooling kiln

Abstract

The utility model discloses a waste heat recovery cooling kiln, including the rotary cooling kiln body with hot material import, cold material export, the rotary cooling kiln body inner periphery along the rotary cooling kiln body length direction is arranged with first heat recovery pipe group, second heat recovery pipe group, first heat recovery pipe group is close to hot material import one side, second heat recovery pipe group is close to cold material export one side, the heat exchange gas is passed into in first heat recovery pipe group, the heat exchange water is passed into in second heat recovery pipe group. The heat exchange gas in first heat recovery pipe group carries out the temperature reduction to high temperature material, and the temperature is promoted, can be used for heating equipment, drying equipment, as the use occasion such as high temperature air distribution in combustion furnace needs high temperature gas, the heat exchange water low temperature in second heat recovery pipe group enters, and after high temperature material cooling, forms high temperature water discharge, can be centrally stored and is given to heat water equipment or hot water user and uses, reduces the evaporation amount increase of all adoption cooling water, causes the waste problem of water resource.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of cooling device, specifically relates to a waste heat recovery cooling kiln. BACKGROUND

[0002] In the industrial production process, after solid material is calcined and baked, the temperature of the material is increased. In the subsequent process, it is needed to cool the material, collect, store and transport it into the next process. The common method is to use water cooling jacket to cool the material to the required temperature. This method can cool the material, but the physical heat contained in the material cannot be recovered, causing energy waste. At the same time, the evaporation amount of the cooling water is increased, causing waste of water resources. CONTENT

[0003] In view of the above technical problems, the utility model aims at providing a waste heat recovery cooling kiln which can cool and obtain high-temperature gas and high-temperature hot water for utilization.

[0004] To achieve the above purpose, the utility model provides the following technical scheme:

[0005] The waste heat recovery cooling kiln comprises a rotary cooling kiln body with a hot material inlet and a cold material outlet, a material channel is formed in the rotary cooling kiln body and communicates with the hot material inlet and the cold material outlet, a first heat recovery pipe group and a second heat recovery pipe group are arranged along the length direction of the rotary cooling kiln body on the inner periphery of the rotary cooling kiln body, the first heat recovery pipe group is close to one side of the hot material inlet, the second heat recovery pipe group is close to one side of the cold material outlet, heat exchange gas is introduced into the first heat recovery pipe group, and heat exchange water is introduced into the second heat recovery pipe group.

[0006] As a further embodiment, the first heat recovery pipe group comprises a first heat recovery gas pipe arranged on the inner periphery of the rotary cooling kiln body. The first heat recovery gas pipe extends from the hot material inlet to the inner periphery of the middle part of the rotary cooling kiln body and is arranged on the inner periphery of the rotary cooling kiln body to form a first heat recovery gas pipe layer. The two ends of the first heat recovery gas pipe extend to the outside of the rotary cooling kiln body. One end is used as a gas inlet end, and the other end is used as a gas outlet end.

[0007] As a further embodiment, the first heat recovery pipe group further comprises a second heat recovery gas pipe arranged on the inner side of the first heat recovery gas pipe layer. The second heat recovery gas pipe is arranged in the same way as the first heat recovery gas pipe. The second heat recovery gas pipe forms a second heat recovery gas pipe layer on the inner side of the first heat recovery gas pipe layer.

[0008] As a further implementation, the second heat recovery pipe group comprises a water distribution chamber, a water collection chamber, a rotary joint, and a heat recovery water pipe group, the rotary joint is arranged at one end of the rotary cooler body close to the cold material outlet, the rotary joint comprises a water inlet channel and a water outlet channel, the water distribution chamber is in communication with the water inlet channel, the water collection chamber is in communication with the water outlet channel, and the heat recovery water pipe group is connected between the water collection chamber and the water distribution chamber and extends from the cold material outlet to the inner wall of the rotary cooler body.

[0009] As a further implementation, the water distribution chamber and the water collection chamber are arranged inside or outside the rotary cooler body close to the cold material outlet.

[0010] As a further implementation, the heat recovery water pipe group comprises a plurality of heat recovery water pipes connected between the water collection chamber and the water distribution chamber, the plurality of heat recovery water pipes are arranged along the radial direction of the rotary cooler body and form at least one layer of heat recovery water pipe layer.

[0011] As a further implementation, a baffle assembly is arranged in the rotary cooler body and arranged along the axial length of the rotary cooler body where the first heat recovery pipe group and / or the second heat recovery pipe group is arranged.

[0012] As a further implementation, the gas inlet end of the first heat recovery gas pipe is provided with an inlet expansion joint.

[0013] By adopting the above technical scheme, compared with the prior art, the present application has the following beneficial effects:

[0014] The first heat recovery pipe group cools the high-temperature material, the second heat recovery pipe group further recovers heat from the high-temperature material, the heat exchange gas in the first heat recovery pipe group is heated after cooling the high-temperature material, and the heated heat exchange gas can be used in heating equipment, drying equipment, and as high-temperature air supply in a combustion furnace, etc., the heat exchange water in the second heat recovery pipe group is cooled after cooling the high-temperature material, and the cooled heat exchange water can be stored and used in heating water equipment or hot water users, the heat exchange gas in the first heat recovery pipe group is heated to a higher temperature, the use of the high-temperature heat exchange gas is increased, and the evaporation of the cooling water is reduced, thereby reducing the waste of water resources. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is an external structure diagram of the present application;

[0016] Figure 2The internal structure schematic view of the utility model is shown in the figure.

[0017] Figure 3 The cross section structure schematic view of the first heat recovery pipe group in the utility model is shown in the figure.

[0018] Figure 4 The cross section structure schematic view of the second heat recovery pipe group in the utility model is shown in the figure.

[0019] Figure 5 The enlarged schematic view of A part in the utility model is shown in the figure. Figure 2 The enlarged schematic view of B part in the utility model is shown in the figure.

[0020] Figure 6 The enlarged schematic view of B part in the utility model is shown in the figure. Figure 2 The enlarged schematic view of B part in the utility model is shown in the figure.

[0021] The figure mark in the drawing represents as follows:

[0022] 10, hot material import, 11, cold material export, 12, rotary cooling kiln body, 13, material passage, 14, first heat recovery pipe group, 15, second heat recovery pipe group, 16, first heat recovery gas pipeline, 17, second heat recovery gas pipeline, 18, water distribution chamber, 19, water collection chamber, 20, rotary joint, 21, heat recovery water pipe group, 22, water inlet passage, 23, water outlet passage, 24, outer sealing plate, 25, inner sealing plate, 26, rear cylinder, 27, pipe body, 28, heat recovery water pipeline, 29, baffle, 30, connecting rod, 31, air inlet expansion joint. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0024] Please see Figures 1-6As shown, the waste heat recovery cooling kiln comprises a rotary cooling kiln body 12 with a hot material inlet 10 and a cold material outlet 11, a material passage 13 is formed in the rotary cooling kiln body 12 and is in communication with the hot material inlet 10 and the cold material outlet 11, high-temperature material enters the rotary cooling kiln body 12 from the hot material inlet 10, is cooled, and is discharged from the cold material outlet 11, a first heat recovery pipe group 14 and a second heat recovery pipe group 15 are arranged along the length direction of the rotary cooling kiln body 12 on the inner periphery of the rotary cooling kiln body 12, and respectively cool the high-temperature material while obtaining heat from the high-temperature material, wherein the first heat recovery pipe group 14 is close to the side of the hot material inlet 10, and first cools the entering high-temperature material, the second heat recovery pipe group 15 is close to the side of the cold material outlet 11, and further recovers heat from the high-temperature material after heat recovery by the first heat recovery pipe group, and further reduces the temperature of the high-temperature material, heat exchange gas is introduced into the first heat recovery pipe group 14, and heat exchange water is introduced into the second heat recovery pipe group 15, the heat exchange gas in the first heat recovery pipe group 14 is cooled by the high-temperature material, and the temperature is increased, and can be used for heating equipment, drying equipment, as high-temperature air distribution in a combustion furnace, and other use occasions requiring high-temperature gas. The heat exchange water in the second heat recovery pipe group 15 is low-temperature, is cooled by the high-temperature material, and is discharged as high-temperature water, which can be stored and used by heating water equipment or hot water users. By first introducing heat exchange gas into the first heat recovery pipe group 14, the heat exchange gas in the first heat recovery pipe group 14 can obtain better temperature rise, and the use scenarios of high-temperature heat exchange gas are increased.

[0025] In some embodiments, the first heat recovery pipe group 14 comprises a first heat recovery gas pipe 16 arranged on the inner periphery of the rotary cooling kiln body 12, the first heat recovery gas pipe 16 extends from the hot material inlet 10 to the inner periphery of the middle part of the rotary cooling kiln body 12 and is arranged on the inner periphery of the rotary cooling kiln body 12 to form a first heat recovery gas pipe layer, and the two ends of the first heat recovery gas pipe 16 extend to the outside of the rotary cooling kiln body 12, one end is used as a gas inlet end, and the other end is used as a gas outlet end. The first heat recovery gas pipe 16 can be arranged in the rotary cooling kiln body 12 in a meandering or spiral manner to increase the heat exchange area of the first heat recovery gas pipe 16 in the rotary cooling kiln body 12, accelerate the cooling effect of the high-temperature material, and increase the temperature rise of the gas in the first heat recovery gas pipe 16.

[0026] In some embodiments, in order to further obtain the cooling capacity of the high-temperature material and increase the flow of the heat exchange gas, the first heat recovery pipe group 14 further comprises a second heat recovery gas pipe 17 arranged inside the first heat recovery gas pipe layer, the second heat recovery gas pipe 17 is arranged in the same way as the first heat recovery gas pipe 16, and the second heat recovery gas pipe 17 forms a second heat recovery gas pipe layer inside the first heat recovery gas pipe layer, that is, from the radial direction of the rotary cooling kiln body 12, the first heat recovery gas pipe 16 is outside the second heat recovery gas pipe 17, and of course, a third heat recovery gas pipe or more can be added according to the needs, and the heat recovery gas pipe is not limited to being arranged at the inner circumferential position of the rotary cooling kiln body 12, but can also be arranged at the central position in the diameter direction of the rotary cooling kiln body 12. The number and arrangement position of the heat recovery gas pipe are set according to the needs.

[0027] In some embodiments, the second heat recovery pipe group 15 comprises a water distribution chamber 18, a water collection chamber 19, a rotary joint 20, a heat recovery water pipe group 21, the rotary joint 20 is assembled at one end of the rotary cooling kiln body 12 close to the cold material outlet 11, the rotary joint 20 comprises a water inlet channel 22 and a water outlet channel 23, the water inlet channel 22 is outside the water outlet channel 23, the water distribution chamber 18 is in communication with the water inlet pipe, the water collection chamber 19 is in communication with the water outlet channel 23, and the heat recovery water pipe group 21 is communicated between the water collection chamber 19 and the water distribution chamber 18. The heat recovery water pipe group 21 extends from the cold material outlet 11 to the inner circumferential direction of the middle part of the rotary cooling kiln body 12. Here, low-temperature cold water is mainly used to enter the water distribution chamber 18 through the water inlet channel 22, and the low-temperature cold water is sent into the heat recovery water pipe group 21 through the water distribution chamber 18, so as to cool the high-temperature material and raise the temperature of the low-temperature cold water, thereby forming high-temperature hot water. After the high-temperature hot water is collected by the water collection chamber 19, it is discharged through the water outlet channel 23, so as to cool the high-temperature material and recycle the heat through the temperature rise of the low-temperature cold water. Here, the heat recovery water pipe group 21 can also be arranged in the rotary cooling kiln body 12 in a spiral or circuitous manner, so as to increase the heat exchange area in the rotary cooling kiln body 12, thereby accelerating the cooling effect of the high-temperature material and increasing the temperature rise of the cold water in the heat recovery water pipe group 21.

[0028] In some embodiments, the water distribution chamber 18 and the water collection chamber 19 are arranged inside or outside the rotary cooling kiln body 12 close to the cold material outlet 11, as shown in the attached drawings of the present application. Figure 2As shown in the drawings, the water distribution chamber 18 and the water collection chamber 19 are arranged in the end of the rotary cooling kiln body 12. The outer sealing plate 24 and the inner sealing plate 25 are fixedly arranged in the end of the rotary cooling kiln body 12, and the water collection chamber 19 is formed between the outer sealing plate 24 and the inner sealing plate 25 and communicates with the water outlet channel 23. The rear cylinder 26 is fixedly arranged on the inner side of the inner sealing plate 25 of the rotary cooling kiln body 12, and the water distribution chamber 18 is formed in the rear cylinder 26. The rear cylinder 26 communicates with the pipe body 27 forming the water outlet channel 23, so that the water distribution chamber 18 and the water collection chamber 19 are formed in the rotary cooling kiln body 12. Of course, the water distribution chamber 18 and the water collection chamber 19 can also be arranged outside the rotary cooling kiln body 12. Figure 2 As shown in the drawings, the water distribution chamber 18 and the water collection chamber 19 are arranged in the end of the rotary cooling kiln body 12. The outer sealing plate 24 and the inner sealing plate 25 are fixedly arranged in the end of the rotary cooling kiln body 12, and the water collection chamber 19 is formed between the outer sealing plate 24 and the inner sealing plate 25 and communicates with the water outlet channel 23. The rear cylinder 26 is fixedly arranged on the inner side of the inner sealing plate 25 of the rotary cooling kiln body 12, and the water distribution chamber 18 is formed in the rear cylinder 26. The rear cylinder 26 communicates with the pipe body 27 forming the water outlet channel 23, so that the water distribution chamber 18 and the water collection chamber 19 are formed in the rotary cooling kiln body 12. Of course, the water distribution chamber 18 and the water collection chamber 19 can also be arranged outside the rotary cooling kiln body 12.

[0029] In some embodiments, the heat recovery water pipe group 21 includes a plurality of heat recovery water pipes 28 connected between the water collection chamber 19 and the water distribution chamber 18. The plurality of heat recovery water pipes 28 are distributed along the inner periphery of the rotary cooling kiln body 12, and at least one layer of heat recovery water pipe layer is formed along the radial direction of the rotary cooling kiln body 12. It is meant that a plurality of heat recovery water pipes 28 are connected in parallel between the water collection chamber 19 and the water distribution chamber 18, and the plurality of heat recovery water pipes 28 are used to guide the water in the water distribution chamber 18 to the water collection chamber 19, and in the process of flowing, the high-temperature materials are cooled and the temperature of the heat recovery water pipes 28 is increased. In order to obtain better heat recovery and cooling effect, a plurality of layers of heat recovery water pipe layers can be arranged along the radial direction of the rotary cooling kiln body 12.

[0030] In some embodiments, a baffle assembly is arranged in the rotary cooling kiln body 12 and arranged along the axial length of the rotary cooling kiln body 12 where the first heat recovery pipe group 14 and / or the second heat recovery pipe group 15 are arranged. The baffle assembly includes a plurality of baffles 29 fixedly arranged in the rotary cooling kiln body 12 at intervals, and a connecting rod 30 used to connect the baffles 29. The flow path of the high-temperature materials in the material channel 13 is extended by the baffles 29, so as to enhance the cooling effect of the high-temperature materials.

[0031] In some embodiments, the gas inlet end of the first heat recovery gas pipe 16 is provided with an inlet expansion joint 31 to compensate for the deformation of the pipe caused by thermal expansion and contraction, and to reduce the risk of leakage at the pipe connection.

[0032] The patent structure is divided into two sections, i.e. front and back sections, to form a double cooling structure, i.e. the high-temperature part is cooled by air and the low-temperature part is cooled by water. Meanwhile, the column tube type heat exchange structure is combined with the rotary kiln to increase the heat exchange area, reduce the length and diameter of the kiln body, save the investment cost and land area of the cooling kiln, and the hot air of the high-temperature zone heat exchange can be used as the air required for drying materials, heating and combustion to realize energy conversion and save energy.

[0033] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A waste heat recovery cooling kiln comprising a rotary cooling kiln body having a hot material inlet and a cold material outlet, a material passageway formed in the rotary cooling kiln body in communication with the hot material inlet and the cold material outlet, characterised in that, The first heat recovery pipe group and the second heat recovery pipe group are arranged along the length direction of the rotary cooling kiln body, the first heat recovery pipe group is close to the hot material inlet side, the second heat recovery pipe group is close to the cold material outlet side, the first heat recovery pipe group is filled with heat exchange gas, and the second heat recovery pipe group is filled with heat exchange water.

2. The waste heat recovery cooling kiln of claim 1, wherein, The first heat recovery pipe group comprises a first heat recovery gas pipe arranged on the inner periphery of the rotary cooling kiln body, the first heat recovery gas pipe extends from the hot material inlet to the inner periphery of the middle part of the rotary cooling kiln body and is arranged on the inner periphery of the rotary cooling kiln body to form a first heat recovery gas pipe layer, and the two ends of the first heat recovery gas pipe extend to the outside of the rotary cooling kiln body, one end is used as a gas inlet end, and the other end is used as a gas outlet end.

3. The waste heat recovery cooling kiln of claim 2, wherein, The first heat recovery pipe group further comprises a second heat recovery gas pipe arranged on the inner side of the first heat recovery gas pipe layer, the second heat recovery gas pipe is arranged in the same way as the first heat recovery gas pipe, and the second heat recovery gas pipe forms a second heat recovery gas pipe layer on the inner side of the first heat recovery gas pipe layer.

4. The waste heat recovery cooling kiln of claim 1, wherein, The second heat recovery pipe group comprises a water distribution chamber, a water collection chamber, a rotary joint, and a heat recovery water pipe group, the rotary joint is assembled on one end of the rotary cooling kiln body close to the cold material outlet, the rotary joint comprises a water inlet channel and a water outlet channel, the water distribution chamber is in communication with the water inlet channel, the water collection chamber is in communication with the water outlet channel, the heat recovery water pipe group is connected between the water collection chamber and the water distribution chamber, and the heat recovery water pipe group extends from the cold material outlet to the inner periphery of the middle part of the rotary cooling kiln body.

5. The waste heat recovery cooling kiln of claim 1, wherein, The water distribution chamber and the water collection chamber are arranged inside or outside the rotary cooling kiln body close to the cold material outlet.

6. The waste heat recovery cooling kiln of claim 4, wherein, The heat recovery water pipe group comprises a plurality of heat recovery water pipes connected between the water collection chamber and the water distribution chamber, the plurality of heat recovery water pipes are distributed on the inner periphery of the rotary cooling kiln body and form at least one heat recovery water pipe layer along the radial direction of the rotary cooling kiln body.

7. The waste heat recovery cooling kiln of claim 1, wherein, A baffle assembly is arranged in the rotary cooling kiln body, and the baffle assembly is arranged along the axial length of the rotary cooling kiln body where the first heat recovery pipe group or / and the second heat recovery pipe group is arranged.

8. The waste heat recovery cooling kiln of claim 2, wherein, The gas inlet end of the first heat recovery gas pipe is provided with an inlet expansion joint.

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