Energy-saving cement kiln waste heat recovery device

Abstract

The invention discloses an energy-saving cement kiln waste heat recovery device, which belongs to the technical field of waste heat recovery processing, and has the technical key points that the energy-saving cement kiln waste heat recovery device comprises a recovery box, and heat exchange of cement kiln waste heat and recovery processing of heat energy can be well realized through an arranged heat exchange recovery mechanism; through the arranged cleaning treatment mechanism, cleaning treatment of a cleaning brush plate on the filter plate is achieved, the filter plate can be in a good working state all the time, the service life of the cleaning brush plate is prolonged, the replacement frequency is reduced, meanwhile, impurities in tail gas can be conveniently discharged and treated, and the service life of the filter plate is prolonged. Through the arranged purification treatment mechanism, a catalyst can be extracted, acid gas in tail gas can be subjected to good catalytic treatment, good purification treatment on the tail gas is achieved, in addition, conveying kinetic energy of the tail gas is used for driving blades to rotate, the running cost of tail gas treatment is reduced, and the environment is protected. The waste heat recovery device has the advantages of good waste heat recovery effect, convenience in tail gas purification and convenience in energy-saving use.

Description

Technical Field

[0001] The invention relates to the field of waste heat recovery and treatment, and in particular to an energy-saving cement kiln waste heat recovery device. Background Art

[0002] Cement production is an industry with high energy consumption, and its energy consumption accounts for a large proportion of the energy consumption of my country's building materials industry. In the cement production process, the kiln is one of the main energy-consuming equipment. The heat energy generated by fuel combustion is mainly used for clinker calcination, but it also generates a lot of waste heat. If this waste heat is not recovered and utilized, it will be wasted in vain and will also cause thermal pollution to the environment.

[0003] The exhaust gas of cement kilns contains a large amount of heat energy. In the process of extracting the exhaust gas through the induced draft fan, the existing cement kiln waste heat recovery mostly adopts a semi-wrapped type, and the heat collection effect is not obvious. Some equipment only uses the fan to directly cool the cylinder surface, and no effective heat recovery measures are taken, resulting in the heat dissipated in the air becoming environmental pollution and energy waste. The utilization of waste heat from exhaust gas is not sufficient, there is a problem of energy waste, and the maximum waste heat utilization cannot be achieved. At the same time, the exhaust gas discharged from the cement kiln cannot be well purified, which is easy to cause pollution to the surrounding environment and cannot meet the actual use needs.

[0004] Therefore, it is necessary to provide an energy-saving cement kiln waste heat recovery device to solve the above problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, an embodiment of the present invention aims to provide an energy-saving cement kiln waste heat recovery device, aiming to solve the technical problems raised in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An energy-saving cement kiln waste heat recovery device comprises a recovery box, a maintenance door is arranged on the outside of the recovery box, a first recovery pipe and a second recovery pipe for waste heat recovery are arranged in the recovery box, the first recovery pipe and the second recovery pipe are connected to each other, and one side of the second recovery pipe is connected to a third recovery pipe, and further comprises:

[0008] A heat recovery mechanism, which is installed at the connection between the second recovery pipe and the first recovery pipe, and is used to recover the waste heat in the tail gas for heat energy storage. The heat recovery mechanism includes a waste heat recovery sleeve wrapped around the outer layer of the second recovery pipe for heat energy recovery, a first infusion tank for water injection heat exchange treatment, and a first blade for heat exchange control, and a guide plate is provided on one side of the first blade. The first blade is rotatably installed in the first recovery pipe through a first curved rod, and the first curved rod is rotatably installed inside the recovery tank. The waste heat recovery sleeve is connected to the first infusion tank through a second water guide pipe;

[0009] A cleaning mechanism, which is installed inside the third recovery pipe and is used to clean impurities in the tail gas. The cleaning mechanism includes a first material guide wedge, a second material guide wedge, a cleaning brush plate and a filter plate. The filter plate is fixedly installed inside the third recovery pipe. The cleaning brush plate is rotatably installed inside the third recovery pipe through a sixth connecting shaft and is located on the side of the filter plate. The first material guide wedge and the second material guide wedge are both fixedly installed at the corner connection inside the third recovery pipe.

[0010] The purification treatment mechanism is installed at the end connection of the third recovery pipe and is synchronously driven by the cleaning treatment mechanism to purify the acidic gas in the tail gas. The purification treatment mechanism includes a second infusion box for purifying infusion and a purification box. The second infusion box is connected to a spray plate through a fifth water pipe. The spray plate is fixedly installed inside the purification box. The third recovery pipe is connected to the inside of the purification box through a plurality of air pipes.

[0011] As a further solution of the present invention, the heat exchange recovery mechanism also includes a first piston plate, a first pressing plate and a first connecting rod for driving the first infusion box to perform infusion heat exchange connection, one end of the first connecting rod is rotatably mounted on the first curved rod through a first sleeve, the other end of the first connecting rod is hingedly mounted on the first pressing plate, the first pressing plate is fixedly connected to the first piston plate through the first pressing rod, the first piston plate is limitedly slidably connected to the interior of the first infusion box, and an air hole is opened on the first infusion box.

[0012] As a further solution of the present invention, the heat exchange recovery mechanism also includes a first water pipe and a water tank for water injection connection, the first infusion tank is connected to the water tank through the first water pipe, and the water tank is installed inside the recovery tank, the first water pipe is provided with a first pumping check valve, the second water pipe is provided with a first water injection check valve, the waste heat recovery sleeve is connected to the recovery liquid storage tank through the third water pipe, and the recovery liquid storage tank is installed inside the recovery tank.

[0013] As a further scheme of the present invention, the cleaning processing mechanism also includes a second connecting shaft and a fourth connecting shaft for driving the cleaning brush plate to rotate for cleaning. The sixth connecting shaft is rotatably connected to the fifth connecting shaft through a third synchronous belt. The fifth connecting shaft is rotatably installed on a fixed seat, and the fixed seat is fixedly installed on the third recovery pipe. The fifth connecting shaft is rotatably connected to the fourth connecting shaft through a bevel gear pair. The fourth connecting shaft is rotatably installed inside the fixed seat. The fourth connecting shaft is rotatably connected to the third connecting shaft through a second synchronous belt. The third connecting shaft is fixedly connected to a second gear, and the second gear is meshed with a first gear. The first gear is rotatably installed in the fixed seat through the second connecting shaft, and the diameter of the first gear is larger than that of the second gear.

[0014] As a further solution of the present invention, the cleaning processing mechanism also includes an incomplete gear, a second curved rod and a second blade for driving the cleaning brush plate to intermittently rotate for cleaning, and a guide plate is provided on one side of the second blade. The second blade is rotatably installed in the interior of the third recovery pipe through the second curved rod. An incomplete gear is meshed and connected to one side of the first gear. The incomplete gear is rotatably installed in a fixed seat through a first connecting shaft. The first connecting shaft is rotatably connected to the second curved rod through a first synchronous belt.

[0015] As a further solution of the present invention, the cleaning treatment mechanism also includes a slag discharge pipe for slag discharge treatment, the slag discharge pipe is opened and arranged below the side of the filter plate, and the slag discharge pipe is connected to the interior of the third recovery pipe, and the second material guide wedge block extends to one side of the port of the slag discharge pipe, and a sealing screw cap is screwed on the sealing thread on the slag discharge pipe.

[0016] As a further scheme of the present invention, the purification treatment mechanism also includes a second connecting rod, a second pressing plate and a second piston plate for driving the second infusion box to extract purified liquid. One end of the second connecting rod is rotatably mounted on the second curved rod through a second sleeve, and the other end of the second connecting rod is hingedly mounted on the second pressing plate. The second pressing plate is fixedly connected to the second piston plate through the second pressing rod. The second piston plate is limitedly slidably connected to the interior of the second infusion box, and an air hole is opened on the second infusion box. The second infusion box is connected to the purification storage tank through a fourth water pipe, and the purification storage tank is installed inside the recovery tank. A second water extraction check valve is provided on the fourth water pipe, and a second water injection check valve is provided on the fifth water pipe.

[0017] As a further solution of the present invention, the purification treatment mechanism also includes an exhaust pipe and an exhaust fan for exhaust purification, the exhaust pipe is connected to the interior of the purification box, the exhaust pipe is provided with an exhaust fan for inducing air, and an activated carbon plate is provided at one end of the exhaust pipe.

[0018] In summary, compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0019] The heat exchange recovery mechanism provided in the present invention can well realize the heat exchange and heat energy recovery of cement kiln waste heat, does not need to be driven by electrical structures, and completely relies on the transportation of exhaust gas to realize waste heat recovery, has good energy-saving effect, and can facilitate the sustainable development of the enterprise.

[0020] The cleaning treatment mechanism set up not only realizes the cleaning treatment of the filter plate by the cleaning brush plate, but also can keep the filter plate in good working condition at all times, thereby improving production efficiency, and at the same time can well extend the service life of the cleaning brush plate and reduce the replacement frequency, which not only reduces equipment costs, but also reduces production interruptions caused by replacing the filter plate, helps to reduce waste generation, and meets the requirements of environmental protection and sustainable development. In addition, the first guide wedge and the second guide wedge are provided at the corner connection in the third recovery pipe, which facilitates the good discharge treatment of impurities in the exhaust gas.

[0021] Through the purification treatment mechanism set up, the catalyst can be extracted and the acidic gas in the exhaust gas can be well catalytically treated, thereby achieving good purification of the exhaust gas. In addition, the exhaust gas's own transport kinetic energy is used to drive the blades to rotate, and no additional electricity or mechanical equipment is required to drive it, which reduces the operating cost of the exhaust gas treatment and the difficulty of operation. It has good energy-saving effects, realizes the recycling of resources, and improves the economic benefits of the enterprise.

[0022] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the invention.

[0024] Figure 2 It is a schematic side view of the structure of an embodiment of the invention.

[0025] Figure 3 It is a schematic diagram of the internal structure of an embodiment of the invention.

[0026] Figure 4 It is a partial cross-sectional structural schematic diagram of the internal connection of an embodiment of the invention.

[0027] Figure 5 It is a schematic diagram of the cross-sectional structure of the first infusion box connection in an embodiment of the invention.

[0028] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of A.

[0029] Figure 7It is a schematic diagram of a partial cross-sectional top view of the internal connection of an embodiment of the invention.

[0030] Figure 8 It is a schematic cross-sectional structural diagram of the connection of the second infusion box in an embodiment of the invention.

[0031] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure of B.

[0032] Fig.10 It is a schematic diagram of the connection structure inside the fixing base in an embodiment of the invention.

[0033] Fig.11 for Fig.10 Schematic diagram of the enlarged structure of C in the figure.

[0034] Fig.12 It is a schematic diagram of the cross-sectional structure inside the third recovery pipe in the embodiment of the invention.

[0035] Fig.13 for Fig.12 Schematic diagram of the enlarged structure of D in the figure.

[0036] Fig.14 It is a schematic diagram of the cross-sectional structure inside the purification box in the embodiment of the invention.

[0037] 1. The first pumping station is provided with a plurality of pressure relief valves, each of which is provided with a plurality of pressure relief valves. The pressure relief valves are provided with a plurality of pressure relief valves. The pressure relief valves are provided with a plurality of pressure relief valves. The pressure relief valves are provided with a plurality of pressure relief valves. The pressure relief valves are provided with a plurality of pressure relief valves. 1. First water pumping check valve; 2. Purification liquid storage tank; 3. Fifth water guide pipe; 3. Second water injection check valve; 3. Purification tank; 3. Spray plate; 3. Air guide pipe; 3. Exhaust pipe; 3. Exhaust fan; 4. Activated carbon plate; 4. First synchronous belt; 4. First connecting shaft; 4. Incomplete gear; 4. First gear; 4. Second connecting shaft; 4. Second gear; 4. Third connecting shaft; 4. Fourth connecting shaft; 4. Second synchronous belt; 5. Bevel gear pair; 5. Fifth connecting shaft; 5. Third synchronous belt; 5. Sixth connecting shaft; 5. Cleaning brush plate; 5. Filter plate; 5. First material guide wedge block; 5. Second material guide wedge block; 5. Slag discharge pipe; 5. Sealing screw cap; 6. Fixed seat; 6. Guide plate; 6. Air hole. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0040] Example 1

[0041] See also Figure 1 to Figure 7 , an energy-saving cement kiln waste heat recovery device, comprising a recovery box 1, a maintenance door 2 is arranged on the outside of the recovery box 1, a first recovery pipe 3 and a second recovery pipe 20 for waste heat recovery are arranged in the recovery box 1, the first recovery pipe 3 and the second recovery pipe 20 are connected to each other, and one side of the second recovery pipe 20 is connected to a third recovery pipe 21, and also includes:

[0042] A heat recovery mechanism is installed at the connection between the second recovery pipe 20 and the first recovery pipe 3, and is used to recover the waste heat in the exhaust gas for storing thermal energy. The heat recovery mechanism includes a waste heat recovery sleeve 17 wrapped around the outer layer of the second recovery pipe 20 for heat recovery, a first infusion tank 11 for water injection heat exchange treatment, and a first blade 4 for heat exchange control, and a guide plate 61 is provided on one side of the first blade 4. The first blade 4 is rotatably installed in the first recovery pipe 3 through the first curved rod 5, and the first curved rod 5 is rotatably installed inside the recovery tank 1, and the waste heat recovery sleeve 17 is connected to the first infusion tank 11 through the second water conduit 15.

[0043] Furthermore, the heat exchange recovery mechanism also includes a first piston plate 10, a first pressing plate 8 and a first connecting rod 7 for driving the first infusion box 11 to perform infusion heat exchange connection. One end of the first connecting rod 7 is rotatably mounted on the first curved rod 5 through the first sleeve 6, and the other end of the first connecting rod 7 is hingedly mounted on the first pressing plate 8. The first pressing plate 8 is fixedly connected to the first piston plate 10 through the first pressing rod 9. The first piston plate 10 is limitedly slidably connected to the inside of the first infusion box 11, and an air hole 62 is opened on the first infusion box 11.

[0044] Furthermore, the heat exchange recovery mechanism also includes a first water pipe 12 and a water tank 14 for water injection connection. The first infusion tank 11 is connected to the water tank 14 through the first water pipe 12, and the water tank 14 is installed inside the recovery tank 1. A first pumping check valve 13 is provided on the first water pipe 12, and a first water injection check valve 16 is provided on the second water pipe 15. The waste heat recovery sleeve 17 is connected to a recovery liquid storage tank 19 through a third water pipe 18, and the recovery liquid storage tank 19 is installed inside the recovery tank 1.

[0045] Preferably, the high-temperature exhaust gas generated by the cement kiln enters the first recovery pipe 3 through the induced draft fan, and under the driving effect of the wind and the guiding effect of the guide plate 61, the first blade 4 is driven to rotate inside the first recovery pipe 3, thereby correspondingly driving the first curved rod 5 to rotate continuously. Due to the curved setting of the first curved rod 5, under the rotational connection between the first sleeve 6 and the first curved rod 5 and the hinged relationship between the first connecting rod 7 and the first pressing plate 8, the first pressing plate 8 drives the first piston plate 10 on the first pressing rod 9 to reciprocate inside the first infusion box 11, thereby the first pumping check valve 13 set on the first water pipe 12 and the first water injection check valve set on the second water pipe 15 16, it is convenient to circulate the water in the water tank 14 and pump it into the waste heat recovery sleeve 17. Since the waste heat recovery sleeve 17 is wrapped and connected to the outer side of the second recovery pipe 20, the injected water gradually rises from the bottom of the waste heat recovery sleeve 17. This rising method can well complete the recovery of waste heat in the exhaust gas. Subsequently, the heat exchanged water is injected into the recovery liquid storage tank 19 through the third water pipe 18 for storage, thereby realizing the heat exchange of waste heat from the cement kiln and the recovery of thermal energy. It does not need to be driven by electrical structures, and the waste heat recovery is completely realized by the transportation of exhaust gas. It has good energy-saving effect and is convenient for real-time waste heat recovery, which can promote the sustainable development of the enterprise.

[0046] It should be noted that in order to prevent exhaust gas or heat energy from leaking from the gap between the first curved rod 5 and the first recovery pipe 3, a sealing ring is specially arranged between the first curved rod 5 and the first recovery pipe 3 for sealing, so that the first blade 4 can maintain a good sealing state with the first recovery pipe 3 during the rotation process.

[0047] Example 2

[0048] like Figures 1 to 13 As shown, based on Example 1, this embodiment further includes a cleaning mechanism, which is installed inside the third recovery pipe 21 and is used to clean impurities in the exhaust gas. The cleaning mechanism includes a first material guide wedge 56, a second material guide wedge 57, a cleaning brush plate 54 and a filter plate 55. The filter plate 55 is fixedly installed inside the third recovery pipe 21. The cleaning brush plate 54 is rotatably installed inside the third recovery pipe 21 through a sixth connecting shaft 53 and is located on the side of the filter plate 55. The first material guide wedge 56 and the second material guide wedge 57 are both fixedly installed at the corner connection inside the third recovery pipe 21.

[0049] Furthermore, the cleaning processing mechanism also includes a second connecting shaft 45 and a fourth connecting shaft 48 for driving the cleaning brush plate 54 to rotate for cleaning. The sixth connecting shaft 53 is rotatably connected to the fifth connecting shaft 51 through the third synchronous belt 52. The fifth connecting shaft 51 is rotatably installed on the fixed seat 60, and the fixed seat 60 is fixedly installed on the third recovery pipe 21. The fifth connecting shaft 51 is rotatably connected to the fourth connecting shaft 48 through the bevel gear pair 50. The fourth connecting shaft 48 is rotatably installed inside the fixed seat 60. The fourth connecting shaft 48 is rotatably connected to the third connecting shaft 47 through the second synchronous belt 49. The third connecting shaft 47 is fixedly connected to the second gear 46. The second gear 46 is meshed with the first gear 44. The first gear 44 is rotatably installed in the fixed seat 60 through the second connecting shaft 45. The diameter of the first gear 44 is larger than that of the second gear 46.

[0050] Furthermore, the cleaning processing mechanism also includes an incomplete gear 43, a second curved rod 23 and a second blade 22 for driving the cleaning brush plate 54 to intermittently rotate for cleaning, and a guide plate 61 is provided on one side of the second blade 22. The second blade 22 is rotatably installed in the interior of the third recovery pipe 21 through the second curved rod 23. One side of the first gear 44 is meshedly connected with the incomplete gear 43. The incomplete gear 43 is rotatably installed in the fixed seat 60 through the first connecting shaft 42. The first connecting shaft 42 is rotatably connected to the second curved rod 23 through the first synchronous belt 41.

[0051] Furthermore, the cleaning treatment mechanism also includes a slag discharge pipe 58 for slag discharge treatment, which is opened and arranged below the side of the filter plate 55, and is connected to the interior of the third recovery pipe 21, and the second material guide wedge block 57 extends to one side of the port of the slag discharge pipe 58, and a sealing screw cap 59 is screwed on the sealing thread on the slag discharge pipe 58.

[0052] Preferably, in the present embodiment, the exhaust gas after waste heat recovery enters the interior of the third recovery pipe 21 through the second recovery pipe 20, and the filter plate 55 arranged in the third recovery pipe 21 performs impurity filtering treatment. When the exhaust gas enters the third recovery pipe 21, the second blade 22 in the third recovery pipe 21 is correspondingly driven to rotate under the guiding action of the guide plate 61, and the second blade 22 correspondingly drives the second curved rod 23 to rotate, so that the second curved rod 23 drives the incomplete gear 43 on the first connecting shaft 42 to rotate under the synchronous driving action of the first synchronous belt 41, and in the meshing connection relationship, the second connecting shaft 45 on the first gear 44 is intermittently driven to rotate. Since the diameter of the first gear 44 is larger than that of the second gear 46, the second gear 46 is correspondingly driven to rotate intermittently and quickly, and at the same time, in the second The fourth connecting shaft 48 is driven to rotate by the synchronous driving action of the synchronous belt 49, and the fourth connecting shaft 48 drives the fifth connecting shaft 51 to rotate under the connection relationship of the bevel gear pair 50. Then, the fifth connecting shaft 51 drives the cleaning brush plate 54 on the sixth connecting shaft 53 to rotate intermittently under the synchronous driving action of the third synchronous belt 52, so as to facilitate the cleaning of the side of the filter plate 55 and avoid impurities clogging the filter plate 55. Through this intermittent rotation cleaning method, the filter plate 55 can always be in a good working condition, thereby improving production efficiency, and can well extend the service life of the cleaning brush plate 54 and reduce the replacement frequency, which not only reduces the equipment cost, but also reduces the production interruption caused by replacing the filter plate 55, which helps to reduce the generation of waste and meets the requirements of environmental protection and sustainable development.

[0053] Among them, it should be particularly noted that the second curved rod 23 and the first connecting shaft 42 are both provided with pulleys that are synchronously connected to the first synchronous belt 41, the third connecting shaft 47 and the fourth connecting shaft 48 are both provided with pulleys that are synchronously connected to the second synchronous belt 49, and the fifth connecting shaft 51 and the sixth connecting shaft 53 are both provided with pulleys that are synchronously connected to the third synchronous belt 52.

[0054] In addition, a first material guide wedge 56 and a second material guide wedge 57 are provided at the corner connection in the third recovery pipe 21, so that impurities in the tail gas can enter the slag discharge pipe 58 for collection and treatment under the action of the inclined surfaces of the first material guide wedge 56 and the second material guide wedge 57, and the sealing screw cover 59 can be detached and screwed on, so as to facilitate the good discharge of impurities in the tail gas.

[0055] It should be noted that in order to prevent exhaust gas or heat energy from leaking from the gap between the second curved rod 23 and the third recovery pipe 21, a sealing ring is specially arranged between the second curved rod 23 and the third recovery pipe 21 for sealing, so that the second blade 22 can maintain a good sealing state with the third recovery pipe 21 during rotation.

[0056] Example 3

[0057] like Figure 1 to Figure 14 As shown, based on the above embodiments, this embodiment further includes a purification treatment mechanism, which is installed at the end connection of the third recovery pipe 21 and is synchronously driven by the cleaning treatment mechanism to purify the acidic gas in the exhaust gas. The purification treatment mechanism includes a second infusion box 29 and a purification box 35 for purifying infusion. The second infusion box 29 is connected to a spray plate 36 through a fifth water pipe 33. The spray plate 36 is fixedly installed inside the purification box 35. The third recovery pipe 21 is connected to the inside of the purification box 35 through a plurality of air pipes 37.

[0058] Furthermore, the purification treatment mechanism also includes a second connecting rod 25, a second pressing plate 26 and a second piston plate 28 for driving the second infusion box 29 to extract purified liquid. One end of the second connecting rod 25 is rotatably mounted on the second curved rod 23 through a second shaft sleeve 24, and the other end of the second connecting rod 25 is hingedly mounted on the second pressing plate 26. The second pressing plate 26 is fixedly connected to the second piston plate 28 through a second pressing rod 27. The second piston plate 28 is limitedly slidably connected to the interior of the second infusion box 29, and an air hole 62 is opened on the second infusion box 29. The second infusion box 29 is connected to the purification storage tank 32 through a fourth water pipe 30, and the purification storage tank 32 is installed inside the recovery box 1. A second water extraction check valve 31 is provided on the fourth water pipe 30, and a second water injection check valve 34 is provided on the fifth water pipe 33.

[0059] Furthermore, the purification treatment mechanism also includes an exhaust pipe 38 and an exhaust fan 39 for exhaust purification. The exhaust pipe 38 is connected to the interior of the purification box 35. The exhaust fan 39 for inducing air is arranged on the exhaust pipe 38. An activated carbon plate 40 is arranged at one end of the exhaust pipe 38.

[0060] Preferably, in this embodiment, while the second curved rod 23 on the second blade 22 is rotating continuously, since the second curved rod 23 is arranged in a curved shape, the second piston plate 28 is driven to reciprocate and connect to the inside of the second infusion tank 29 under the connection relationship between the second shaft sleeve 24 and the second connecting rod 25, so that the fourth water pipe 30 extracts the catalyst in the purification storage tank 32 under the connection relationship between the second pumping check valve 31 arranged on the fourth water pipe 30 and the second water injection check valve 34 arranged on the fifth water pipe 33. The catalyst is injected into the spray plate 36 in the purification box 35 and sprayed out. Since the third recovery pipe 21 is connected to the interior of the purification box 35 through the air guide pipe 37, the catalyst sprayed from the spray plate 36 can catalyze the acidic gas in the exhaust gas well, thereby achieving good purification of the exhaust gas. In addition, an exhaust fan 39 for inducing air is arranged on the exhaust pipe 38, and an activated carbon plate 40 for re-purification is arranged on the exhaust pipe 38, thereby further improving the good purification of the cement kiln exhaust gas and achieving good protection of the environment.

[0061] The present invention utilizes the kinetic energy of the exhaust gas itself to drive the blades to rotate, without the need for additional electricity or mechanical equipment for driving, thereby reducing the operating cost of exhaust gas treatment and the difficulty of operation, achieving good energy-saving effects, realizing the recycling of resources, and improving the economic benefits of the enterprise.

[0062] It should be particularly noted that the components in this application are all universal standard parts or components well known to those skilled in the art, which effectively solve the technical problems raised in the background technology.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-saving cement kiln waste heat recovery device, comprising a recovery box (1), the outer side of the recovery box (1) is provided with a maintenance door (2), characterized in that: The recovery box (1) is provided with a first recovery pipe (3) and a second recovery pipe (20) for recovering waste heat, the first recovery pipe (3) and the second recovery pipe (20) are connected to each other, one side of the second recovery pipe (20) is connected to a third recovery pipe (21), and further comprises: A heat exchange recovery mechanism, which is installed at the connection between the second recovery pipe (20) and the first recovery pipe (3), and is used to recover the waste heat in the tail gas for heat energy storage, the heat exchange recovery mechanism comprising a waste heat recovery sleeve (17) wrapped around the outer layer of the second recovery pipe (20) for heat energy recovery, a first infusion box (11) for water injection heat exchange treatment, and a first blade (4) for heat exchange control, and a guide plate (61) is provided on one side of the first blade (4), the first blade (4) is rotatably installed in the first recovery pipe (3) through a first curved rod (5), and the first curved rod (5) is rotatably installed inside the recovery box (1), and the waste heat recovery sleeve (17) is connected to the first infusion box (11) through a second water guide pipe (15); A cleaning mechanism, which is installed inside the third recovery pipe (21) and is used for cleaning impurities in the tail gas, the cleaning mechanism comprising a first material guide wedge (56), a second material guide wedge (57), a cleaning brush plate (54) and a filter plate (55), the filter plate (55) being fixedly installed inside the third recovery pipe (21), the cleaning brush plate (54) being rotatably installed inside the third recovery pipe (21) through a sixth connecting shaft (53) and being arranged on the side of the filter plate (55), the first material guide wedge (56) and the second material guide wedge (57) being fixedly installed at a corner connection inside the third recovery pipe (21); A purification mechanism is installed at the end connection of the third recovery pipe (21), is synchronously driven by the cleaning mechanism, and is used to purify the acid gas in the tail gas. The purification mechanism includes a second infusion box (29) for purifying infusion and a purification box (35). The second infusion box (29) is connected to a spray plate (36) through a fifth water pipe (33). The spray plate (36) is fixedly installed inside the purification box (35). The third recovery pipe (21) is connected to the inside of the purification box (35) through a plurality of air pipes (37).

2. The energy-saving cement kiln waste heat recovery device according to claim 1 is characterized in that: The heat exchange recovery mechanism also includes a first piston plate (10), a first pressing plate (8) and a first connecting rod (7) for driving the first infusion box (11) to perform infusion heat exchange connection, one end of the first connecting rod (7) is rotatably mounted on the first curved rod (5) through a first shaft sleeve (6), the other end of the first connecting rod (7) is hingedly mounted on the first pressing plate (8), the first pressing plate (8) is fixedly connected to the first piston plate (10) through a first pressing rod (9), the first piston plate (10) is limitedly slidably connected to the inside of the first infusion box (11), and an air hole (62) is opened on the first infusion box (11).

3. The energy-saving cement kiln waste heat recovery device according to claim 2 is characterized in that: The heat exchange recovery mechanism further comprises a first water pipe (12) and a water tank (14) for water injection connection; the first liquid infusion box (11) is connected to the water tank (14) via the first water pipe (12), and the water tank (14) is installed inside the recovery box (1); a first water pumping check valve (13) is provided on the first water pipe (12), and a first water injection check valve (16) is provided on the second water pipe (15); the waste heat recovery sleeve (17) is connected to a recovery liquid storage tank (19) via a third water pipe (18), and the recovery liquid storage tank (19) is installed inside the recovery box (1).

4. The energy-saving cement kiln waste heat recovery device according to claim 1 is characterized in that: The cleaning processing mechanism also includes a second connecting shaft (45) and a fourth connecting shaft (48) for driving the cleaning brush plate (54) to rotate and clean; the sixth connecting shaft (53) is rotatably connected to a fifth connecting shaft (51) via a third synchronous belt (52); the fifth connecting shaft (51) is rotatably mounted on a fixed seat (60), and the fixed seat (60) is fixedly mounted on the third recovery pipe (21); the fifth connecting shaft (51) is rotatably connected to the fourth connecting shaft (48) via a bevel gear pair (50); The fourth connecting shaft (48) is rotatably mounted inside the fixed seat (60); the fourth connecting shaft (48) is rotatably connected to the third connecting shaft (47) via a second synchronous belt (49); the third connecting shaft (47) is fixedly connected to a second gear (46); the second gear (46) is meshingly connected to a first gear (44); the first gear (44) is rotatably mounted inside the fixed seat (60) via a second connecting shaft (45); the diameter of the first gear (44) is larger than that of the second gear (46).

5. The energy-saving cement kiln waste heat recovery device according to claim 4 is characterized in that: The cleaning processing mechanism also includes an incomplete gear (43) for driving the cleaning brush plate (54) to intermittently rotate for cleaning, a second curved rod (23) and a second blade (22), and a guide plate (61) is provided on one side of the second blade (22), the second blade (22) is rotatably mounted inside the third recovery pipe (21) through the second curved rod (23), one side of the first gear (44) is meshedly connected with the incomplete gear (43), the incomplete gear (43) is rotatably mounted in the fixed seat (60) through the first connecting shaft (42), and the first connecting shaft (42) is rotatably connected to the second curved rod (23) through the first synchronous belt (41).

6. The energy-saving cement kiln waste heat recovery device according to claim 5, characterized in that: The cleaning treatment mechanism also includes a slag discharge pipe (58) for slag discharge treatment, the slag discharge pipe (58) is opened below the side of the filter plate (55), and the slag discharge pipe (58) is connected to the inside of the third recovery pipe (21), and the second material guide wedge (57) extends to one side of the port of the slag discharge pipe (58), and a sealing screw cap (59) is screwed on the sealing thread on the slag discharge pipe (58).

7. The energy-saving cement kiln waste heat recovery device according to claim 5, characterized in that: The purification treatment mechanism also includes a second connecting rod (25), a second pressing plate (26) and a second piston plate (28) for driving the second infusion box (29) to extract the purified liquid. One end of the second connecting rod (25) is rotatably mounted on the second curved rod (23) through a second shaft sleeve (24). The other end of the second connecting rod (25) is hingedly mounted on the second pressing plate (26). The second pressing plate (26) is fixedly connected to the second piston plate (28) through a second pressing rod (27). The second piston plate (28) is limitedly slidably connected to the interior of the second infusion box (29), and the second infusion box (29) is provided with an air hole (62). The second infusion box (29) is connected to the purification storage box (32) through the fourth water pipe (30), and the purification storage box (32) is installed in the interior of the recovery box (1). The fourth water pipe (30) is provided with a second pumping check valve (31), and the fifth water pipe (33) is provided with a second water injection check valve (34).

8. The energy-saving cement kiln waste heat recovery device according to claim 7, characterized in that: The purification treatment mechanism also includes an exhaust pipe (38) and an exhaust fan (39) for exhaust purification. The exhaust pipe (38) is connected to the interior of the purification box (35). The exhaust fan (39) for air induction is arranged on the exhaust pipe (38). An activated carbon plate (40) is arranged at one end of the exhaust pipe (38).

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