Spray drying tower capable of utilizing waste heat of kiln

Abstract

The utility model discloses a spray drying tower capable of utilizing waste heat of a kiln. The spray drying tower comprises spray tower equipment, hot air supply equipment and a waste heat conveying pipe, the spray tower equipment comprises a tower body, the tower body is provided with a hot air inlet, a spray gun used for spraying and a discharging valve, the hot air supply equipment is used for conveying hot air to the hot air inlet, and the hot air supply equipment comprises a combustion chamber and an air heat exchange assembly arranged above the combustion chamber. The air heat exchange assembly is provided with a first exhaust port communicated with the hot air inlet, the first exhaust port is used for conveying hot air obtained after heat exchange to the hot air inlet, and the waste heat conveying pipe is connected with the first air inlet end of the combustion chamber and used for conveying kiln smoke to the combustion chamber. According to the technical scheme, the spray drying tower can effectively utilize heat energy of kiln flue gas, so that when the spray drying tower dries liquid atomization blanks through hot air, energy consumption can be reduced, and the energy utilization rate can be increased.

Description

Technical Field

[0001] The utility model relates to the technical field of tile manufacturing, in particular to a spray drying tower which can utilize the waste heat of a kiln. Background Art

[0002] In the process of tile production, the spray drying tower requires a large amount of heat energy when drying the embryo powder. This heat energy is generally only generated by burning chemical fuels in the combustion chamber. However, some residual heat will be directly discharged in the other steps of tile production and cannot be used in the spray drying tower, resulting in low energy utilization of the spray drying tower. Utility Model Content

[0003] The main purpose of the utility model is to provide a spray drying tower which can utilize the waste heat of a kiln, so as to improve the energy utilization rate of the spray drying tower and reduce energy consumption.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a spray drying tower that can utilize the waste heat of the kiln, comprising:

[0005] The spray tower equipment comprises a tower body, wherein the tower body is provided with a hot air inlet, a spray gun for spraying and a discharge valve;

[0006] a hot air supply device, used for delivering hot air to the hot air inlet, the hot air supply device comprising a combustion chamber, and an air heat exchange component arranged above the combustion chamber, the air heat exchange component having a first exhaust port connected to the hot air inlet, the first exhaust port being used for delivering the hot air after heat exchange to the hot air inlet; and

[0007] A waste heat delivery pipe is connected to the first air inlet end of the combustion chamber and is used for delivering kiln smoke to the combustion chamber.

[0008] Preferably, the combustion chamber further has a second air intake end, and the second air intake end is provided with a second air intake fan for conveying air to the combustion chamber.

[0009] Preferably, a one-way valve is provided at the input end of the second air intake fan.

[0010] Preferably, the air heat exchange assembly includes a shell and an air heat exchanger arranged in the shell, the air heat exchanger includes a plurality of heat exchange plates arranged at intervals, and heat exchange air ducts interspersed with the plurality of heat exchange plates, a smoke flow cavity is formed between the plurality of heat exchange plates, the input end of the smoke flow cavity is connected to the combustion chamber, and the output end of the smoke flow cavity is provided with a discharge port located in the shell.

[0011] Preferably, a first air inlet communicating with one end of the heat exchange air duct is provided on the outer side of the shell, and the other end of the heat exchange air duct is communicated with the first air outlet.

[0012] Preferably, a first air intake fan is provided on the first air intake port, and the first air intake fan is used to transport normal temperature air to the heat exchange air duct.

[0013] Preferably, it also includes a filter assembly, which includes a box body, the box body has a first inner cavity, the first inner cavity is provided with a first filter element, the first inner cavity has an input end and an output end, the first inner cavity input end is connected to the discharge port, the box body is provided with a discharge pipe, and the discharge pipe is connected to the first inner cavity output end.

[0014] Preferably, the box body also has a second inner cavity isolated from the first inner cavity, a second filter element is arranged in the second inner cavity, the second inner cavity has an input end and an output end, the box body is provided with an air inlet pipe, the air inlet pipe is respectively connected to the kiln smoke exhaust end and the second inner cavity input end, and the second inner cavity output end is connected to the waste heat transport pipe.

[0015] Preferably, the filter assembly further comprises a cover body, wherein the cover body covers the box body and is used to form the first inner cavity and the second inner cavity in the box body, and the air inlet pipe and the exhaust pipe are arranged on the cover body.

[0016] Preferably, an inner wall of the second cavity and a surface of the cover body facing the second cavity are both provided with a heat-insulating layer.

[0017] The technical solution of the utility model adopts a waste heat conveying pipe to input kiln flue gas into the combustion chamber, and the remaining heat energy in the kiln flue gas is used to increase the combustion energy of the combustion chamber and reduce the consumption of the original fuel in the combustion chamber. At the same time, when the combustion is carried out in the combustion chamber, the combustible materials that are not completely burned in the kiln flue gas can be subjected to secondary combustion, thereby effectively utilizing the heat energy of the kiln flue gas, so that the spray drying tower can reduce energy consumption and improve energy utilization when drying the liquid atomized blank by hot air. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 This is a schematic structural diagram of an embodiment of a spray drying tower that can utilize waste heat from a kiln according to the utility model;

[0020] Figure 2 It is a schematic diagram of the combustion chamber of the spray drying tower that can utilize the waste heat of the kiln in the utility model;

[0021] Figure 3 It is a schematic diagram of the heat exchanger in the spray drying tower that can utilize the waste heat of the kiln according to the utility model;

[0022] Figure 4 It is a schematic diagram of a spray tower device in a spray drying tower that can utilize waste heat from a kiln according to the utility model;

[0023] Figure 5 It is a schematic diagram of a filtering component in a spray drying tower that can utilize waste heat from a kiln according to the present invention.

[0024] Description of Figure Numbers:

[0025] Label name Label name 10 Spray tower equipment 43 First exhaust port 11 Tower body 44 Discharge port 12 Air inlet pipe 45 First intake fan 13 spray gun 46 Heat exchanger 14 Feeding valve 50 Filter components 20 Combustion Chamber 51 Box 21 Second intake fan 52 Cover 22 Check valve 53 Intake pipe 30 Waste heat transfer pipe 54 Discharge pipe 40 Air heat exchange components 55 First filter 41 case 56 Second filter 42 First air inlet

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] The utility model provides a spray drying tower which can utilize the waste heat of a kiln. Figure 1 This is a schematic structural diagram of an embodiment of a spray drying tower that can utilize waste heat from a kiln according to the utility model; Figure 2It is a schematic diagram of the combustion chamber of the spray drying tower that can utilize the waste heat of the kiln in the utility model; Figure 3 It is a schematic diagram of the heat exchanger in the spray drying tower that can utilize the waste heat of the kiln according to the utility model; Figure 4 It is a schematic diagram of a spray tower device in a spray drying tower that can utilize waste heat from a kiln according to the utility model; Figure 5 It is a schematic diagram of a filtering component in a spray drying tower that can utilize waste heat from a kiln according to the present invention.

[0031] In the embodiment of the utility model, the spray drying tower that can utilize the waste heat of the kiln includes a spray tower device 10, a hot air supply device and a waste heat conveying pipe 30; Figures 1 to 5 As shown, the spray tower device 10 includes a tower body 11, the tower body 11 is provided with a hot air inlet 12, a spray gun 13 for spraying and a discharge valve 14, a hot air supply device is used to transport hot air to the hot air inlet 12, the hot air supply device includes a combustion chamber 20, and an air heat exchange component 40 arranged above the combustion chamber 20, the air heat exchange component 40 has a first exhaust port 43 connected to the hot air inlet 12, the first exhaust port 43 is used to transport the hot air after heat exchange to the hot air inlet 12, and the waste heat transport pipe 30 is connected to the first air inlet end of the combustion chamber 20, and is used to transport kiln smoke to the combustion chamber 20.

[0032] In this embodiment, there are multiple spray guns 13, each of which is connected to a slurry supply pipe. The multiple spray guns 13 are arranged around the tower body 11 and transport liquid blanks into the tower body 11. A hot air distributor is also provided in the tower body 11. The hot air distributor distributes the hot air from the hot air inlet 12 to the liquid blanks sprayed from each spray gun 13, so that the liquid blanks can be dried evenly.

[0033] The technical solution of the utility model adopts the waste heat conveying pipe 30 to input the kiln flue gas into the combustion chamber 20, and the remaining heat energy in the kiln flue gas is used to increase the combustion energy of the combustion chamber 20, and reduce the consumption of the original fuel of the combustion chamber 20. At the same time, when the combustion is carried out in the combustion chamber 20, the combustible materials that are not completely burned in the kiln flue gas can be subjected to secondary combustion, so as to fully and effectively utilize the heat energy of the kiln flue gas, so that the spray drying tower can reduce energy consumption and improve energy utilization rate when drying the liquid atomized blank by hot air; and when the kiln combustion flue gas is subjected to secondary combustion, some harmful components can be burned and consumed to reduce the content of harmful substances in the flue gas, so as to reduce the consumption for flue gas treatment when the kiln combustion flue gas is discharged to the external environment.

[0034] Combined with reference Figure 2As shown, in this embodiment, the combustion chamber 20 also has a second air inlet end, and the second air inlet end is provided with a second air inlet fan 21 for conveying air to the combustion chamber 20. Specifically, when the combustion chamber 20 is burning, sufficient oxygen supply is required, and the kiln fume from the waste heat conveying pipe 30 does not contain much oxygen, which is not enough for the combustion chamber 20 to burn. Therefore, it is necessary to additionally provide a second air inlet end, and supplement oxygen into the combustion chamber 20 through the second air inlet fan 21, so that the combustion in the combustion chamber 20 can be fully burned and generate hot air.

[0035] Combined with reference Figure 2 As shown, further, a one-way valve 22 is provided at the input end of the second air intake fan 21. In this embodiment, due to the provision of the second air intake end, the second air intake end causes the combustion chamber 20 to be connected with the external environment. When the waste heat delivery pipe 30 delivers the kiln smoke to the combustion chamber 20, the smoke can be prevented from leaking from the second air intake end to the outdoor environment, causing the smoke to pollute the environment, and also prevents the smoke from leaking out and causing the waste of heat energy in the smoke.

[0036] Combined with reference Figure 2 , Figure 3 As shown, in this embodiment, the air heat exchange component 40 includes a shell 41 and an air heat exchanger arranged in the shell 41. The air heat exchanger includes a plurality of heat exchange fins 46 arranged at intervals and a heat exchange air duct interspersed with the plurality of heat exchange fins 46. A smoke flow cavity is formed between the plurality of heat exchange fins 46. The input end of the smoke flow cavity is connected to the combustion chamber 20, and the output end of the smoke flow cavity is provided with a discharge port 44 located in the shell 41.

[0037] Specifically, the heat exchange duct is arranged in a circuitous manner from bottom to top in the air heat exchanger, and the heat exchange plates 46 are arranged at intervals in the air heat exchanger. The heat exchange plates 46 can be arranged in one row or in multiple rows. The heat exchange duct passes through each heat exchange plate 46, and the smoke flow cavity is arranged in the gap between multiple heat exchange plates 46. When the combustion smoke from the combustion chamber 20 enters the smoke flow cavity, the heat exchange plates 46 are heated. The heated heat exchange plates 46 exchange heat with the heat exchange duct, so that the air in the duct is heated and then enters the tower body 11 from the hot air inlet 12 for use in the spray drying tower.

[0038] Combined with reference Figure 2As shown, further, a first air inlet 42 connected to one end of the heat exchange air duct is provided on the outer side of the shell 41, and the other end of the heat exchange air duct is connected to the first exhaust port 43. In this embodiment, specifically, the heat exchange air duct inputs ambient air through the first air inlet 42, and exhausts the air after heat exchange through the first exhaust port 43, so as to realize the mutual independence of the heat exchange air duct and the smoke flow cavity, and avoid harmful substances in the exhaust gas of the combustion chamber 20 directly entering the tower body 11 from the hot air inlet 12; at the same time, when filtering the smoke, it can also avoid directly filtering the high-temperature smoke, which greatly reduces the life of the smoke filtration materials.

[0039] Optionally, a first air intake fan 45 is provided on the first air intake port 42, and the first air intake fan 45 is used to deliver room temperature air to the heat exchange air duct. In another embodiment, a first air intake fan 45 can be further installed on the first air intake port 42 to accelerate the entry of air into the heat exchange air duct.

[0040] Combined with reference Figure 5 As shown, in other embodiments, a filter assembly 50 is further included, and the filter assembly 50 includes a box body 51, the box body 51 has a first inner cavity, the first inner cavity is provided with a first filter element 55, the first inner cavity has an input end and an output end, the first inner cavity input end is connected to the discharge port 44, the box body 51 is provided with a discharge pipe 54, and the discharge pipe 54 is connected to the first inner cavity output end.

[0041] In this embodiment, the material of the first filter element can be porous honeycomb ceramic, activated carbon or limestone. Specifically, by setting the filter element 50 at the smoke exhaust end of the air heat exchange component 40, the first filter element 55 of the filter element 50 can perform preliminary filtering treatment on the air after heat exchange, without directly filtering the high-temperature smoke after combustion, thereby reducing the loss of the first filter element 55 and increasing the service life of the first filter element 55.

[0042] Optionally, the box body 51 also has a second inner cavity isolated from the first inner cavity, a second filter element 56 is provided in the second inner cavity, the second inner cavity has an input end and an output end, the box body 51 is provided with an air intake pipe 53, the air intake pipe 53 is respectively connected to the kiln smoke exhaust end and the second inner cavity input end, and the second inner cavity output end is connected to the waste heat transport pipe 30.

[0043] In this embodiment, the second filter element 56 can be made of alumina ceramic fiber material, so that the second filter element 56 has the characteristics of high temperature resistance and corrosion resistance. Specifically, when the kiln flue gas is transported to the combustion chamber 20 through the waste heat transport pipe 30, the kiln flue gas can be adsorbed in advance to remove some harmful substances.

[0044] Optionally, the filter assembly 50 further includes a cover 52, which covers the box body 51 and is used to form a first inner cavity and a second inner cavity in the box body 51, and the air inlet pipe 53 and the exhaust pipe 54 are arranged on the cover 52. In this embodiment, by providing a detachable cover 52, the box body 51 is easy to open, thereby facilitating the replacement of the first filter element 55 and the second filter element 56.

[0045] Optionally, the inner wall of the second cavity and the side of the cover 52 facing the second cavity are both provided with a heat-insulating layer (not shown in the figure). Specifically, when the second cavity is closed, the inner peripheral wall of the second cavity can be insulated, so that when the kiln smoke enters the second cavity, the consumption of waste heat in the kiln smoke can be reduced.

[0046] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A spray drying tower that can utilize waste heat from a kiln, characterized in that: include: The spray tower equipment comprises a tower body, wherein the tower body is provided with a hot air inlet, a spray gun for spraying and a discharge valve; a hot air supply device, used for delivering hot air to the hot air inlet, the hot air supply device comprising a combustion chamber, and an air heat exchange component arranged above the combustion chamber, the air heat exchange component having a first exhaust port connected to the hot air inlet, the first exhaust port being used for delivering the hot air after heat exchange to the hot air inlet; and A waste heat delivery pipe is connected to the first air inlet end of the combustion chamber and is used for delivering kiln smoke to the combustion chamber.

2. The spray drying tower capable of utilizing waste heat from a kiln as claimed in claim 1, characterized in that: The combustion chamber also has a second air intake end, and the second air intake end is provided with a second air intake fan for conveying air to the combustion chamber.

3. The spray drying tower capable of utilizing waste heat from a kiln as claimed in claim 2, characterized in that: A one-way valve is provided at the input end of the second air intake fan.

4. The spray drying tower capable of utilizing waste heat from a kiln as claimed in claim 1, characterized in that: The air heat exchange component includes a shell and an air heat exchanger arranged in the shell. The air heat exchanger includes a plurality of heat exchange plates arranged at intervals and heat exchange air ducts interspersed between the plurality of heat exchange plates. A smoke flow cavity is formed between the plurality of heat exchange plates. The input end of the smoke flow cavity is connected to the combustion chamber, and the output end of the smoke flow cavity is provided with a discharge port located in the shell.

5. The spray drying tower capable of utilizing waste heat from a kiln as claimed in claim 4, characterized in that: A first air inlet communicating with one end of the heat exchange air duct is disposed on the outer side of the shell, and the other end of the heat exchange air duct is communicated with the first air outlet.

6. The spray drying tower capable of utilizing waste heat from a kiln as claimed in claim 5, characterized in that: The first air inlet is provided with a first air inlet fan, and the first air inlet fan is used to transport normal temperature air to the heat exchange air duct.

7. The spray drying tower capable of utilizing waste heat from a kiln as claimed in claim 5 or 6, characterized in that: It also includes a filter assembly, which includes a box body, the box body has a first inner cavity, the first inner cavity is provided with a first filter element, the first inner cavity has an input end and an output end, the first inner cavity input end is connected to the discharge port, the box body is provided with a discharge pipe, and the discharge pipe is connected to the first inner cavity output end.

8. The spray drying tower capable of utilizing waste heat from a kiln as claimed in claim 7, characterized in that: The box body also has a second inner cavity isolated from the first inner cavity, a second filter element is arranged in the second inner cavity, the second inner cavity has an input end and an output end, the box body is provided with an air intake pipe, the air intake pipe is respectively connected to the kiln smoke exhaust end and the second inner cavity input end, and the second inner cavity output end is connected to the waste heat transport pipe.

9. The spray drying tower capable of utilizing waste heat from a kiln as claimed in claim 8, characterized in that: The filter assembly further includes a cover body, which is covered on the box body and used to form the first inner cavity and the second inner cavity in the box body. The air inlet pipe and the exhaust pipe are arranged on the cover body.

10. The spray drying tower capable of utilizing waste heat from a kiln as claimed in claim 9, characterized in that: The inner wall of the second inner cavity and the surface of the cover body facing the second inner cavity are both provided with a heat-insulating layer.

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