Cold air recovery device of boiler slag dryer

Abstract

The utility model relates to the technical field of cooling of boiler slag dryers, in particular to a cold air recovery device of a boiler slag dryer, which comprises a cold air supply unit, a flow adjusting component, a cold air uniform distributor, an angle adjusting component and a cold air distribution pipeline. Dynamic adjustment of the cold air flow is achieved through the flow adjusting assembly, uniform distribution of cold air and flexible adjustment of the working angle are achieved through the cold air uniform distributor and the angle adjusting assembly, and the problem of operation stability in the high-dust environment is effectively solved through the dust removal device and the filter screen. And meanwhile, accurate control over the cold air temperature is achieved through the temperature control module. By means of the design, the cold air utilization rate and the equipment operation efficiency are remarkably improved, and the cooling requirement under the complex working condition can be better met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of energy -conserving and environment -protective technology, concretely is a kind of boiler dry slag machine cold air recovery device. BACKGROUND

[0002] When the boiler dry slag machine is cooled, the corresponding cold air recovery device needs to be used. The equipment in high temperature environment is cooled and heat energy utilization is realized by the cold air recovery device, so as to improve energy utilization efficiency. However, the cold air recovery device on the market usually adopts traditional heat exchange or single cold air channel design, which is difficult to dynamically adjust cold air flow and temperature distribution when facing complex working conditions, which may cause low cold air utilization rate and high energy consumption.

[0003] Through the search, a kind of control system and method of liquid molten slag dry centrifugal granulation of the publication number CN106702045B, it is cooled to shaft and granulator by shaft cooling air duct and annular cooling air duct respectively. Although this structure can provide a certain degree of cooling effect, since the cold air supply mode is relatively fixed, the cold air distribution cannot be optimized according to actual working conditions, which may affect the stability of long-term operation in high temperature environment.

[0004] In addition, a kind of high temperature liquid cooling method of the publication number CN111270027B, part of low temperature hot air is recycled by heat exchange between broken solid particle and cold air, but its cold air distribution system cannot be optimized for high dust environment and high temperature fluctuation conditions, which may cause uneven cold air distribution and low recovery efficiency. The above situation shows that the existing cold air recovery device still has certain limitations under complex working conditions, and a more intelligent and efficient solution is needed. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of boiler dry slag machine cold air recovery device, to solve the problem that the existing cold air recovery device mentioned in above background art is difficult to dynamically adjust cold air flow and temperature distribution under complex working conditions, cold air utilization rate is low and the problem of insufficient running stability under high dust environment. To solve the above problems, the utility model is realized as follows: a kind of boiler dry slag machine cold air recovery device, comprising: fixed installation in the equipment frame on cold air supply unit, for providing cooling cold air to boiler dry slag machine;Flow regulating assembly is arranged at the air outlet of the cold air supply unit, the flow regulating assembly is connected with cold air distribution pipeline, for dynamically adjusting the cold air flow according to actual working condition;Cold air distributor is rotatably installed on the cold air distribution pipeline, and power mechanism for driving rotation is arranged on the cold air distributor;Angle adjusting assembly is arranged between the cold air distributor and cold air distribution pipeline, for adjusting the working angle of cold air distributor to adapt to different cooling requirements.

[0006] The flow regulating assembly comprises a regulating housing fixedly installed at the air outlet of the cold air supply unit, a sliding block arranged in the regulating housing, a threaded rod connecting the sliding block with the regulating housing, and one end of the threaded rod extending to the outside of the regulating housing and fixedly connected with the output shaft of a stepping motor, a guide rod fixedly installed on the side wall of the regulating housing and penetrating through the sliding block, and a flow guide hole opened on the sliding block and having a variable cross-sectional area to change the cold air flow.

[0007] The power mechanism comprises a support frame fixedly installed on the outer wall of the cold air distribution pipeline, a drive motor arranged on the support frame, and an output shaft of the drive motor penetrating through the cold air distribution pipeline and fixedly connected with the central shaft of the cold air distributor, and a gear ring fixedly sleeved on the outer wall of the cold air distributor and engaged with the inner wall of the cold air distribution pipeline to enhance the rotational stability of the cold air distributor.

[0008] The angle regulating assembly comprises a mounting seat fixedly installed on the outer wall of the cold air distribution pipeline, a hydraulic cylinder arranged on the mounting seat, and a piston rod of the hydraulic cylinder hingedly connected with the bottom of the cold air distributor, a rotating shaft fixedly installed on the bottom of the cold air distributor and rotationally connected with the pipe wall of the cold air distribution pipeline, and limiting blocks arranged at both ends of the rotating shaft to limit the rotation angle range of the cold air distributor.

[0009] The cold air distributor comprises a plurality of air guide vanes fixedly installed on the main body of the cold air distributor, the air guide vanes being spirally distributed to uniformly distribute cold air to different areas of the boiler dry slag machine, a plurality of flow dividing holes opened on the main body of the cold air distributor and gradually decreasing in size along the cold air flow direction to optimize the flow velocity distribution of the cold air, and a filter screen fixedly installed on the inner wall of the cold air distributor to intercept dust particles in the cold air and prevent them from entering the inside of the boiler dry slag machine.

[0010] The cold air supply unit comprises a fan fixedly installed on the equipment frame, an air inlet of the fan being in communication with the outside atmosphere, and an air outlet of the fan being connected with the cold air supply unit through a pipeline, a dust removal device arranged at the air inlet of the fan and comprising a plurality of filter screens and an electrostatic adsorption plate to remove impurities in the cold air, and a temperature control module fixedly installed in the cold air supply unit, the temperature control module detecting the cold air temperature through a thermocouple sensor and adjusting the cold air temperature through a heating element or a refrigeration element.

[0011] The cold air distribution pipeline comprises: a main pipeline fixedly installed on the equipment frame, which is connected with the air outlet of the cold air supply unit; a plurality of branch pipelines provided on the main pipeline, the ends of the branch pipelines being connected with the cold air distributor; and a flow meter fixedly installed on the branch pipeline, which is used for monitoring the cold air flow in real time and transmitting data to the control system.

[0012] The equipment frame is provided with a walking mechanism, which comprises: a plurality of rollers fixedly installed on the bottom of the equipment frame, the rollers being connected with the equipment frame through bearings; and a locking mechanism fixedly installed on one side of the roller, the locking mechanism comprising a buckle and a spring, and being used for locking the roller when the equipment needs to be fixed.

[0013] Compared with the prior art, the boiler dry slag machine cold air recovery device provided by the utility model realizes dynamic adjustment of cold air flow through the flow adjusting assembly, realizes uniform distribution of cold air and flexible adjustment of working angle through the cold air distributor and the angle adjusting assembly, effectively solves the problem of operation stability in high dust environment through the dust removal device and the filter screen, and realizes accurate control of the cold air temperature through the temperature control module. These designs significantly improve the cold air utilization rate and equipment operation efficiency, and can better meet the cooling demand under complex working conditions. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.

[0015] Figure 1 It is the overall structure schematic diagram of the boiler dry slag machine cold air recovery device according to the embodiment of the utility model;

[0016] Figure 2 It is the cross-sectional structure schematic diagram of the flow adjusting assembly according to the embodiment of the utility model;

[0017] Figure 3 It is the structure schematic diagram of the cold air distributor according to the embodiment of the utility model;

[0018] Figure 4 It is the local enlarged view of the angle adjusting assembly according to the embodiment of the utility model;

[0019] Figure 5 It is the schematic diagram of the walking mechanism at the bottom of the equipment frame according to the embodiment of the utility model.

[0020] In the drawings:

[0021] 1, cold air supply unit; 2, cold air distribution pipeline; 3, cold air distributor; 4, flow regulating assembly; 5, angle adjusting assembly; 6, adjusting housing; 7, sliding block; 8, threaded rod; 9, stepper motor; 10, flow guide hole; 11, air guide blade; 12, flow dividing hole; 13, filter screen; 14, gear ring; 15, hydraulic cylinder; 16, rotating shaft; 17, limiting block; 18, mounting seat; 19, fan; 20, dust removal device; 21, temperature control module; 22, main pipeline; 23, branch pipeline; 24, roller; 25, locking mechanism. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] The utility model provides a kind of boiler dry slag machine cold air recovery device, its structure and operating principle as shown in Figures 1 to 5 The structure, connection relationship and working process of each component will be described in detail below with reference to the drawings. The device mainly includes cold air supply unit 1, cold air distribution pipeline 2, cold air distributor 3, flow regulating assembly 4, angle adjusting assembly 5 and other auxiliary mechanisms. Each component realizes the functions of dynamic adjustment of cold air flow, uniform distribution, angle adjustment and dust filtration through reasonable design and cooperation.

[0024] Cold air supply unit 1 is the core air supply part of the whole device, which mainly consists of fan 19, dust removal device 20 and temperature control module 21. Fan 19 is fixedly installed on the equipment frame, and its air inlet is in communication with the outside atmosphere, and its air outlet is connected with cold air supply unit 1 through pipeline. Dust removal device 20 is arranged at the air inlet of fan 19, which includes multiple layers of filter screen and electrostatic adsorption plate for removing impurities in cold air. Temperature control module 21 is fixedly installed inside cold air supply unit 1, which detects the temperature of cold air through thermocouple sensor and adjusts the temperature of cold air by starting heating element or refrigeration element as needed. The cold air provided by fan 19 enters cold air supply unit 1 after being treated by dust removal device 20, and reaches the set temperature range under the action of temperature control module 21. The air outlet of cold air supply unit 1 is connected with the main pipeline 22 of cold air distribution pipeline 2, so as to deliver the treated cold air to the subsequent components.

[0025] The cold air distribution pipeline 2 includes a main pipeline 22 and a plurality of branch pipelines 23. The main pipeline 22 is fixedly installed on the equipment frame and connected with the air outlet of the cold air supply unit 1. The branch pipelines 23 extend from the main pipeline 22 and are connected with the cold air distributor 3 at the end. A flow meter is arranged on each branch pipeline 23 for real-time monitoring of the cold air flow and transmitting data to the control system. The design of the cold air distribution pipeline 2 enables the cold air to be uniformly distributed to each branch pipeline 23, providing stable airflow input for the subsequent cold air distributor 3.

[0026] The flow regulating assembly 4 is arranged at the air outlet of the cold air supply unit 1, and its structure is shown in Figure 2 . The flow regulating assembly 4 includes an adjusting housing 6, a sliding block 7, a threaded rod 8, a stepping motor 9 and a flow guide hole 10. The adjusting housing 6 is fixedly installed at the air outlet of the cold air supply unit 1 and has the sliding block 7 arranged inside. The sliding block 7 is connected with the inside of the adjusting housing 6 through the threaded rod 8, one end of which extends to the outside of the adjusting housing 6 and is fixedly connected with the output shaft of the stepping motor 9. The stepping motor 9 drives the sliding block 7 to slide along the inner wall of the adjusting housing 6 by controlling the rotation of the threaded rod 8. A guide rod is also fixedly installed on the side wall of the adjusting housing 6, which penetrates through the sliding block 7 and is in sliding cooperation with it to ensure the smooth movement of the sliding block 7. The sliding block 7 is provided with the flow guide hole 10, and the cross-sectional area of the flow guide hole 10 changes with the movement of the sliding block 7, thereby realizing the dynamic adjustment of the cold air flow. Through the precise control of the stepping motor 9, the sliding block 7 can adjust the opening degree of the flow guide hole 10 according to the actual working condition requirements, thereby changing the cold air flow.

[0027] The cold air distributor 3 is rotatably installed at the end of the branch pipeline 23 of the cold air distribution pipeline 2, and its structure is shown in Figure 3 . The cold air distributor 3 includes a plurality of air guide blades 11, a flow dividing hole 12, a filter screen 13 and a gear ring 14. The air guide blades 11 are arranged in a spiral shape on the main body of the cold air distributor 3, which is used to uniformly disperse the cold air to different areas of the boiler dry slag machine. The flow dividing hole 12 is arranged on the main body of the cold air distributor 3, and its size gradually decreases along the direction of cold air flow to optimize the distribution of cold air flow rate. The filter screen 13 is fixedly installed on the inner wall of the cold air distributor 3, which is used to intercept dust particles in the cold air to prevent them from entering the inside of the boiler dry slag machine. The gear ring 14 is fixedly sleeved on the outer wall of the cold air distributor 3, which is engaged with the inner wall of the cold air distribution pipeline 2 to enhance the rotational stability of the cold air distributor 3. A support frame is fixedly installed on the outer wall of the cold air distribution pipeline 2, and a driving motor is arranged on the support frame. The output shaft of the driving motor penetrates through the cold air distribution pipeline 2 and is fixedly connected with the central shaft of the cold air distributor 3. The driving motor drives the cold air distributor 3 to rotate through the output shaft, and the engagement of the gear ring 14 with the inner wall of the cold air distribution pipeline 2 ensures the smooth rotation of the cold air distributor 3.

[0028] The angle adjusting assembly 5 is arranged between the cold air uniform distributor 3 and the cold air distribution pipeline 2, and has a structure as shown in Figure 4 The angle adjusting assembly 5 comprises a hydraulic cylinder 15, a rotating shaft 16, a limiting block 17 and a mounting seat 18. The mounting seat 18 is fixedly installed on the outer wall of the cold air distribution pipeline 2, and the hydraulic cylinder 15 is fixedly installed on the mounting seat 18. The piston rod of the hydraulic cylinder 15 is hingedly connected to the bottom of the cold air uniform distributor 3. The rotating shaft 16 is fixedly installed on the bottom of the cold air uniform distributor 3 and is rotationally connected to the pipe wall of the cold air distribution pipeline 2. The limiting block 17 is arranged at the two ends of the rotating shaft 16 and is used for limiting the rotation angle range of the cold air uniform distributor 3. Through the extension and retraction action of the hydraulic cylinder 15, the cold air uniform distributor 3 can rotate around the rotating shaft 16, so that the working angle thereof is adjusted to adapt to different cooling requirements. The arrangement of the limiting block 17 ensures that the rotation angle of the cold air uniform distributor 3 is within a safe range, so that the equipment damage caused by excessive rotation is avoided.

[0029] A walking mechanism is arranged at the bottom of the equipment frame, and has a structure as shown in Figure 5 The walking mechanism comprises a roller 24 and a locking mechanism 25. The roller 24 is fixedly installed at the bottom of the equipment frame and is connected to the equipment frame through a bearing, so as to facilitate the overall movement of the equipment. The locking mechanism 25 is fixedly installed on one side of the roller 24 and comprises a buckle and a spring. When the equipment needs to be fixed, the buckle of the locking mechanism 25 is locked to the roller 24 through the spring, so as to prevent the equipment from moving. The design of the walking mechanism enables the equipment to be flexibly moved between different stations and to be stably fixed through the locking mechanism 25.

[0030] In actual operation, after the fan 19 is started, external air is sucked in and impurities are removed through the dust removal device 20, and then the air is adjusted to a set temperature through the temperature control module 21 and enters the cold air supply unit 1. The cold air supply unit 1 delivers the treated cold air to the main pipeline 22 of the cold air distribution pipeline 2 and distributes the cold air to each cold air uniform distributor 3 through the branch pipelines 23. The flow adjusting assembly 4 adjusts the opening degree of the flow guide hole 10 by controlling the position of the sliding block 7 through the stepping motor 9 according to the actual working condition requirement, so as to change the cold air flow. The cold air uniform distributor 3 rotates under the driving of the driving motor, and the air guide blade 11 and the flow distribution hole 12 jointly act to uniformly disperse the cold air to different areas of the boiler dry slag machine. At the same time, the angle adjusting assembly 5 adjusts the working angle of the cold air uniform distributor 3 through the action of the hydraulic cylinder 15 to adapt to different cooling requirements. The filter screen 13 intercepts dust particles in the cold air to prevent the dust particles from entering the inside of the boiler dry slag machine and affecting the operation of the equipment. The walking mechanism at the bottom of the equipment frame realizes the flexible movement and stable fixation of the equipment through the roller 24 and the locking mechanism 25.

[0031] The above structure design enables the utility model to effectively solve the technical problems of the existing cold air recovery device under complex working conditions, and realizes the functions of dynamic adjustment, uniform distribution, angle adjustment and dust filtration of the cold air flow.

[0032] In order to better enable the person skilled in the art to fully understand and implement the present utility model, the specific implementation principle of the present utility model is further supplemented below in combination with a specific application scenario.

[0033] During the operation of the boiler dry slag machine, the changes in high-temperature environment and dust concentration pose a demand for dynamic adjustment of the performance of the cold air recovery device. The following are the specific operation steps and operation principle of the cold air recovery device in actual application.

[0034] First, start the fan 19, and the external air enters the system through the dust removal device 20. The multiple layers of filter screens and electrostatic adsorption plates in the dust removal device 20 work together to remove impurity particles in the air, ensuring that the cleanliness of the cold air entering the system meets the requirements. Subsequently, the cold air flows into the temperature control module 21, and the thermocouple sensor detects the cold air temperature in real time and starts the heating element or the refrigeration element for temperature adjustment according to the set value. This process is precisely controlled by the temperature control module 21, so that the cold air temperature is always maintained within the cooling range required by the boiler dry slag machine, thereby effectively avoiding the problem of unstable cooling effect caused by temperature fluctuations.

[0035] Next, the processed cold air enters the flow adjustment assembly 4 through the air outlet of the cold air supply unit 1. The stepper motor 9 drives the threaded rod 8 to rotate according to the actual working condition demand fed back by the control system, driving the sliding block 7 to slide along the inner wall of the adjustment shell 6. Since the sliding block 7 is provided with a flow guide hole 10, the cross-sectional area of the flow guide hole 10 changes with the position of the sliding block 7, so that the cold air flow is dynamically adjusted. For example, when the boiler dry slag machine has a high load and requires greater cooling capacity, the stepper motor 9 moves the sliding block 7 to a position where the flow guide hole 10 has a larger opening to increase the cold air flow; when the load is low, the opening of the flow guide hole 10 is reduced to save energy. This design significantly improves the utilization rate of cold air and reduces energy consumption.

[0036] After the cold air passes through the flow adjustment assembly 4, it is uniformly distributed to multiple branch pipes 23 through the main pipe 22 of the cold air distribution pipeline 2. The flow meter on each branch pipe 23 monitors the cold air flow in real time and transmits the data to the control system to adjust the flow distribution of each branch pipe 23 in a timely manner. This uniform distribution design ensures that the cold air can be stably delivered to each cold air distributor 3, laying a foundation for subsequent cooling operations.

[0037] The cold air distributor 3 starts to rotate under the drive of the motor, and the gear ring 14 on the outer wall thereof is engaged with the inner wall of the cold air distribution pipeline 2, thereby enhancing the stability of rotation. The air guide blades 11 on the main body of the cold air distributor 3 are distributed in a spiral shape, and the cold air is uniformly dispersed to different areas of the boiler dry slag machine. The flow holes 12 gradually decrease along the direction of cold air flow, thereby optimizing the flow rate distribution of the cold air, and enabling the cold air to form a more uniform cooling effect inside the boiler dry slag machine. In addition, the filter screen 13 intercepts residual dust particles in the cold air, thereby preventing the dust particles from entering the inside of the boiler dry slag machine and affecting the operation of the equipment. This design not only improves the uniformity of cold air distribution, but also effectively solves the problem of insufficient stability of equipment operation in a high-dust environment.

[0038] At the same time, the angle adjusting assembly 5 adjusts the working angle of the cold air distributor 3 according to actual cooling requirements. The hydraulic cylinder 15 pushes the cold air distributor 3 to rotate around the rotating shaft 16 through telescopic action, and the limiting block 17 limits the rotation angle range, thereby ensuring that the working angle of the cold air distributor 3 is always within a safe range. For example, when the temperature of a certain area of the boiler dry slag machine is relatively high, the hydraulic cylinder 15 adjusts the cold air distributor 3 to a position with a relatively large inclination angle, so as to enhance the cooling effect on the area; and when the temperature distribution is relatively uniform, the cold air distributor 3 is adjusted to a horizontal position to achieve overall cooling. This flexible angle adjusting function significantly improves the adaptability of the device to complex working conditions.

[0039] Finally, the walking mechanism at the bottom of the equipment frame realizes flexible movement and stable fixation of the equipment through the rollers 24 and the locking mechanism 25. When it is necessary to move the cold air recovery device to different stations, the locking mechanism 25 is unlocked, and the rollers 24 can freely roll; after reaching the specified position, the buckle of the locking mechanism 25 locks the rollers 24 through the spring action, thereby ensuring that the equipment remains stable during operation. This design enables the device to efficiently switch between different stations, while ensuring safety during operation.

[0040] Through the above steps, the cold air recovery device for a boiler dry slag machine provided by the present application realizes dynamic adjustment of cold air flow, uniform distribution, flexible adjustment of working angle, and effective filtration of dust. The realization of these functions not only significantly improves the cold air utilization rate and the equipment operation efficiency, but also effectively solves the problems of uneven cold air distribution, high energy consumption, and unstable operation in a high-dust environment in the prior art, thereby better meeting the cooling requirements under complex working conditions.

[0041] The contents not described in detail in the specification all belong to the prior art known to those skilled in the art, and the model parameters of various electrical appliances are not specifically limited, and conventional equipment can be used. In the technical solution, the electrical control elements not mentioned belong to the prior art, and therefore are not shown in the drawings, and will not be described herein.

[0042] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cold air recovery device for a boiler slag dryer, characterized in that, include: A cold air supply unit (1) is fixedly installed on the equipment frame to provide cooling air to the boiler slag dryer; A flow regulating component (4) is installed at the air outlet of the cold air supply unit (1). The flow regulating component (4) is connected to the cold air distribution pipeline (2) and is used to dynamically adjust the cold air flow according to the actual working conditions. Rotate the cold air distributor (3) installed on the cold air distribution pipe (2), and the cold air distributor (3) is provided with a power mechanism to drive its rotation; An angle adjustment component (5) is installed between the cold air distributor (3) and the cold air distribution pipe (2) to adjust the working angle of the cold air distributor (3) to adapt to different cooling requirements.

2. The cold air recovery device for a boiler slag dryer according to claim 1, characterized in that, The flow regulation component (4) includes: An adjusting housing (6) is fixedly installed at the air outlet of the cold air supply unit (1). A sliding block (7) is provided inside the adjusting housing (6). The sliding block (7) is connected to the inside of the adjusting housing (6) through a threaded rod (8). One end of the threaded rod (8) extends to the outside of the adjusting housing (6) and is fixedly connected to the output shaft of the stepper motor (9). A guide rod is fixedly installed on the side wall of the adjusting housing (6), the guide rod passes through the sliding block (7) and slides with it; A guide hole (10) is formed on the sliding block (7), and the cross-sectional area of ​​the guide hole (10) changes with the movement of the sliding block (7), thereby changing the airflow rate.

3. The cold air recovery device for a boiler slag dryer according to claim 1, characterized in that, The power mechanism includes: A support frame is fixedly installed on the outer wall of the cold air distribution pipe (2). A drive motor is provided on the support frame. The output shaft of the drive motor passes through the cold air distribution pipe (2) and is fixedly connected to the central shaft of the cold air distributor (3). A gear ring (14) is fixedly sleeved on the outer wall of the cold air distributor (3). The gear ring (14) meshes with the inner wall of the cold air distribution pipe (2) to enhance the rotational stability of the cold air distributor (3).

4. The cold air recovery device for a boiler slag dryer according to claim 1, characterized in that, The angle adjustment component (5) includes: A mounting base (18) is fixedly installed on the outer wall of the cold air distribution pipe (2). A hydraulic cylinder (15) is provided on the mounting base (18). The piston rod of the hydraulic cylinder (15) is hinged to the bottom of the cold air distributor (3). A rotating shaft (16) is fixedly installed at the bottom of the cold air distributor (3), and the rotating shaft (16) is rotatably connected to the wall of the cold air distribution pipe (2); Limiting blocks (17) are set at both ends of the rotating shaft (16) to limit the rotation angle range of the cold air distributor (3).

5. The cold air recovery device for a boiler slag dryer according to claim 1, characterized in that, The cold air distributor (3) includes: Multiple air guide blades (11) are fixedly installed on the main body of the cold air distributor (3), and the air guide blades (11) are distributed in a spiral shape; Multiple diversion holes (12) are formed on the main body of the cold air distributor (3), and the size of the diversion holes (12) gradually decreases along the direction of cold air flow; A filter screen (13) is fixedly installed on the inner wall of the cold air distributor (3).

6. The cold air recovery device for a boiler slag dryer according to claim 1, characterized in that, The cold air supply unit (1) includes: A fan (19) is fixedly installed on the equipment frame. The air inlet of the fan (19) is connected to the outside atmosphere, and the air outlet of the fan (19) is connected to the cold air supply unit (1) through a pipe. The dust removal device (20) installed at the air inlet of the fan (19) includes a multi-layer filter screen and an electrostatic adsorption plate; A temperature control module (21) is fixedly installed in the cold air supply unit (1). The temperature control module (21) detects the cold air temperature through a thermocouple sensor and adjusts the cold air temperature through a heating element or a cooling element.

7. The cold air recovery device for a boiler slag dryer according to claim 1, characterized in that, The cold air distribution duct (2) includes: A main pipe (22) is fixedly installed on the equipment frame, and the main pipe (22) is connected to the air outlet of the cold air supply unit (1); Multiple branch pipes (23) are installed on the main pipe (22), and the ends of the branch pipes (23) are connected to the cold air distributor (3); A flow meter is fixedly installed on the branch pipe (23), which is used to monitor the cold air flow in real time and transmit the data to the control system.

8. The cold air recovery device for a boiler slag dryer according to claim 1, characterized in that, A walking mechanism is provided on the equipment frame, and the walking mechanism includes: Multiple rollers (24) are fixedly installed at the bottom of the equipment frame, and the rollers (24) are connected to the equipment frame by bearings; A locking mechanism (25) is fixedly installed on one side of the roller (24), the locking mechanism (25) including a buckle and a spring.

Images