Precise air control structure and method for split type low-temperature drying equipment warehouse body

Abstract

The invention discloses a precise air control structure and method for a split type low-temperature drying equipment warehouse body, and relates to the technical field of sludge low-temperature drying, the precise air control structure comprises a warehouse body and a heat source center, the bottom of the warehouse body is connected with a dehumidification fan and a heating fan through air pipes, a condenser is arranged in the top of the warehouse body, the condenser is connected with the heating fan through a pipeline, and the heat source center is connected with the dehumidification fan. The heat source center is arranged outside the warehouse body and is connected with the dehumidification fan and the warehouse body through pipelines; the interior of the bottom of the warehouse body is partitioned into corresponding spaces through partition baffles, and according to the air volume of dehumidification circulating air generated by the dehumidification draught fan and the air volume of heating circulating air generated by the heating draught fan, flow diffusing plates or flow guiding plates are arranged in the corresponding spaces so that the circulating air can be diffused and laid horizontally in the transverse direction and the longitudinal direction. And the wind speeds at all positions are the same when the circulating wind flows in the top direction of the reservoir body. Heating / dehumidifying circulating air can be conveniently fed from different sides of the warehouse body according to quality, and accurate control over distribution of the circulating air after the circulating air enters the warehouse body is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge low-temperature drying, and particularly to a precise air control structure and method for the body of a split-type low-temperature drying equipment. Background Art

[0002] The working principle of the existing sludge low-temperature dryer on the market is that the circulating air is divided into dehumidifying circulating air and heating circulating air after being processed by the dehumidification heat source center. The dehumidifying circulating air enters from the bottom of the sludge drying equipment body, then comes out from the top of the drying equipment body, and then returns to the dehumidification heat source center again, continuously circulating throughout. The heating circulating air enters from the side of the transmission chain network in the middle of the equipment body through the heating fan, mixes with the dehumidifying air of the lower transmission chain network and then goes upward, passes through the remaining transmission chain network and the filter, and then comes out from the top of the equipment body and returns to the heat source center.

[0003] Most of the existing low-temperature dryers are of an integrated structure. The dehumidifying air mainly relies on a fan combination (commonly there are two types of air supply fans, namely volute-less fans and centrifugal fans) installed on one side of the bottom of the lowest-layer transmission chain network of the equipment body to extract the circulating air after dehumidification and heating from the heat source center and send it to the lowest layer of the transmission chain network of the equipment body. Subsequently, relying on the inertia of the circulating air movement and the obstruction of the surrounding equipment body walls to change the wind direction, it passes upward through the transmission chain network to dry the sludge layer.

[0004] This single air supply method will result in a relatively high wind speed in the inertial direction of the wind and at the turning position along the wall surface, while only very little wind energy can reach other positions. This will cause the wind speed on the lowest-layer transmission chain network to be particularly high in some local areas and particularly low in other areas. The concentrated high wind speed area is more likely to blow away the semi-dry sludge particles on the upper half of the lowest-layer transmission chain network, increasing the dust content in the equipment body. As a result, the sludge in the high wind speed area is easy to dry, but the thermal energy utilization rate is low. In the low wind speed area, the heat is insufficient, the sludge is not easy to dry, and the uniformity of the sludge moisture content at different horizontal positions of the transmission chain network is poor. At the same time, the heating circulating air of the integrated dryer usually blows into the side of the chain network from the middle, which is also not conducive to the distribution of the circulating air. And because the air is supplied from the middle position, this part of the air can only pass through one or two layers of the transmission chain network, and its thermal energy utilization rate is also relatively low, which is not conducive to the energy saving of the system. Summary of the Invention

[0005] Aiming at the problem that the wind speed is prone to be uneven in the equipment body in the prior art, the present invention provides a precise air control structure and method for the body of a split-type low-temperature drying equipment, which can facilitate the separate supply of heating circulating air and dehumidifying circulating air of different qualities from different sides of the equipment body, and is conducive to the precise control of the circulating air distribution after entering the equipment body.

[0006] To achieve the above object, the present invention can adopt the following technical solutions:[[]]END]]

[0007] In a first aspect, the present invention provides a precise wind control structure for a split-type low-temperature drying equipment storehouse, which comprises:

[0008] The bottom of the storage body is connected to a dehumidifying fan and a heating fan through air ducts, and a condenser is arranged in the top of the storage body, and the condenser is connected to the heating fan through a pipeline;

[0009] A heat source center is arranged outside the storage body, and the heat source center is connected to the dehumidification fan and the storage body through a pipeline;

[0010] Among them, corresponding spaces are separated by partition baffles in the bottom of the storage body, and according to the air volume of the dehumidification circulating air generated by the dehumidification fan and the heating circulating air generated by the heating fan, diffuser plates or guide plates are arranged in the corresponding spaces to make the circulating air diffuse and spread horizontally and vertically, so that the wind speed at each position is the same when the circulating air flows toward the top of the storage body.

[0011] As in the above-mentioned precise wind control structure of the split-type low-temperature drying equipment, further, the feed inlet of the storage body is connected to a distributor for releasing sludge, and a conveying component is arranged in the storage body, and the conveying component is respectively connected to the discharge port of the distributor and the discharge port of the storage body;

[0012] The conveying assembly is arranged above the dehumidification fan and the heating fan and below the condenser, so that the sludge is dried and dehydrated by the dehumidification circulating air and the heating circulating air during the conveying process.

[0013] As mentioned above, the precise wind control structure of the split-type low-temperature drying equipment warehouse, further, the conveying assembly includes a plurality of transmission chain nets arranged from top to bottom, the top transmission chain net is arranged below the discharge port of the distributor, the movement directions of adjacent transmission chain nets are opposite and the head ends and tail ends of adjacent transmission chain nets are staggered to receive and convey sludge, and the bottom transmission chain net is arranged above the discharge port of the warehouse.

[0014] As for the precise wind control structure of the split-type low-temperature drying equipment warehouse as mentioned above, further, a plurality of diffusers are arranged at the bottom of the warehouse, a plurality of diffusers are close to the air outlet pipe of the dehumidification fan and are inclined upward at a preset first angle, a plurality of diffusers are distributed at a preset first spacing, and a preset second spacing is satisfied between the higher end of the top diffuser and the bottom transmission chain network.

[0015] For the precise air control structure of the cabinet body of the split-type low-temperature drying equipment as described above, further, a drainage plate is provided inside the bottom of the cabinet body, and the drainage plate is arranged close to the air outlet pipe of the heating fan. The drainage plate includes a drainage inclined plate and a drainage flat plate. The lower end of the drainage inclined plate is connected to the bottom of the cabinet body, and the drainage inclined plate is inclined upward at a preset second angle. A preset third distance is satisfied between the lower end of the drainage inclined plate and the air inlet of the cabinet body. The drainage flat plate is horizontally arranged, and one end of the drainage flat plate is connected to the higher end of the drainage inclined plate. A preset fourth distance is satisfied between the drainage flat plate and the lowermost transmission chain net, and a preset fifth distance is satisfied between the other end of the drainage flat plate and the wall surface opposite to the air inlet of the cabinet body.

[0016] For the precise air control structure of the cabinet body of the split-type low-temperature drying equipment as described above, further, a filter is further included, and the filter is arranged between the condenser and the conveying assembly.

[0017] For the precise air control structure of the cabinet body of the split-type low-temperature drying equipment as described above, further, the shape of the air outlet pipe of the heating fan is trapezoidal.

[0018] In a second aspect, the present invention provides a method for precisely controlling the air flow in the cabinet body of a split-type low-temperature drying equipment. Based on the above-mentioned precise air control structure of the cabinet body of the split-type low-temperature drying equipment, it includes the following steps:

[0019] Step 1: Use computer-aided software to model the cabinet body of the split-type low-temperature drying equipment to obtain a cabinet body air control structure model;

[0020] Step 2: Adjust the specification parameters of the diffuser plate and the drainage plate in the cabinet body air control structure model. By measuring the wind speeds of the circulating air at multiple positions on the leeward side of the lowermost transmission chain net in the cabinet body, obtain the standard deviation of the average wind speed on the leeward side of the lowermost transmission chain net in the cabinet body according to the wind speeds of the circulating air at multiple positions;

[0021] Step 3: Compare the obtained standard deviation of the average wind speed with a preset threshold value to obtain a comparison result;

[0022] Step 4: Determine the cabinet body air control structure according to the comparison result.

[0023] For the method for precisely controlling the air flow in the cabinet body of the split-type low-temperature drying equipment as described above, further, the specific method for obtaining the standard deviation of the average wind speed on the leeward side of the lowermost transmission chain net in the cabinet body according to the specification parameters in Step 2 is:

[0024] Set the leeward side of the lowermost transmission chain network as the monitoring surface. Along the length direction of the transmission chain network at equal intervals in the width direction of the transmission chain network, take m parallel line segments. The starting and ending points of the line segments are located at the starting point and the ending point of the transmission chain network respectively, and set n wind speed sampling points at equal intervals on each line segment, so as to calculate the standard deviation σ of the average wind speed of each line segment.

[0025] Among them, the calculation formula of the standard deviation σ of the average wind speed is as follows:

[0026]

[0027] In the formula, σ is the standard deviation of the average wind speed of each sampling point line segment on the leeward side of the lowermost transmission chain network; is the average value of the wind speed data at each point on a single line segment; v i is the measured point velocity data, n is the number of wind speed measurement points on each sampling line segment, m is the number of line segments, is the average value of the average wind speeds of all line segments.

[0028] For the precise air volume control method of the body of the split-type low-temperature drying equipment as described above, further, the comparison standard in step 3 is:

[0029] If the standard deviation of the average wind speed is less than the preset threshold, then proceed to step 4;

[0030] If the standard deviation of the average wind speed is not less than the preset threshold, then return to step 2.

[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0032] Compared with the traditional integral-structure low-temperature dryer, the present invention adopts a split structure, connects the heat source center and the body through an air duct, sends the dehumidification circulating air and the heating circulating air into the body from different side positions at the bottom of the body, and effectively controls the diffusion mode of the circulating air after entering the body, so as to improve the wind speed uniformity of the upward passing through the lowermost transmission chain network and the mud layer, and further ensure the wind speed uniformity of each layer of the transmission chain network; it can also reduce dust, improve the energy utilization rate and the uniformity of the moisture content of the mud discharged at each position in the width direction of the lowermost transmission chain network, ensure that the dehumidification heat source center can operate stably, efficiently and for a long time, and reduce the maintenance frequency. Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1Schematic diagram of the structure of the split-type low-temperature drying equipment according to the embodiment of the present invention (the dotted line represents the invisible position on the back of the library body);

[0035] Figure 2 Layout diagram of the diffuser plate according to the embodiment of the present invention;

[0036] Figure 3 Layout diagram of the drainage plate according to the embodiment of the present invention;

[0037] Figure 4 3D model mesh division diagram of the library body according to the embodiment of the present invention;

[0038] Figure 5 Verification flow chart of the standard deviation of the average wind speed according to the embodiment of the present invention;

[0039] Figure 6 Upward wind speed cloud map of the monitoring surface according to the embodiment of the present invention (the line segment is the wind speed value-taking position line segment);

[0040] Wherein: 1. Heat source center; 2. Distributor; 3. Library body; 4. Dehumidification circulating air; 5. Dehumidification fan; 6. Outlet duct of the dehumidification fan; 7. Bottom space of the library body; 8. First heating circulating air; 9. Partition baffle; 10. First heating fan; 11. Second heating circulating air; 12. Second heating fan; 13. Outlet duct of the heating fan; 14. Discharge port of the library body; 15. Transmission chain net; 16. Sludge; 17. Wind baffle; 18. Filter; 19. Condenser; 20. Diffuser plate; 21. Drainage inclined plate; 22. Drainage flat plate; 23. Dust settling area. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0042] Embodiment:

[0043] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present invention are used to distinguish similar objects and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" in the embodiments of the present invention and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, component, product or device comprising a series of steps or devices does not necessarily have to be limited to those steps or devices clearly listed, but may include other steps or devices not clearly listed or inherent to these processes, methods, products or devices.

[0044] It should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention.

[0045] In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined. In addition, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0047] In a first aspect, the present invention provides a precise air control structure for a split-type low-temperature drying equipment library body, which includes a library body 3 and a heat source center 1. The bottom of the library body 3 is respectively connected with a dehumidification fan 5 and a heating fan through air ducts. A condenser 19 is arranged inside the top of the library body 3, and the condenser 19 is connected with the heating fan through a pipeline. The heat source center 1 is arranged outside the library body 3, and the heat source center 1 is connected with the dehumidification fan 5 and the library body 1 through pipelines; wherein, the bottom inside of the library body 3 is separated into corresponding spaces by a partition baffle 9, and according to the air volume of the dehumidification circulating air generated by the dehumidification fan and the heating circulating air generated by the heating fan, a diffuser plate or a diversion plate is arranged in the corresponding space so that the circulating air diffuses and spreads horizontally and longitudinally, and further makes the wind speed at each position the same when the circulating air flows towards the top direction of the library body 3.

[0048] Specifically, compared with the traditional integral low-temperature dryer, the present invention separates the heat source center 1 and the library body 3, connects them through air ducts, and enters from different sides at the bottom of the library body 3 according to the types of dehumidification circulating air and heating circulating air. Refer to Figure 1 , the bottom of the library body 3 has three air inlets, one of which is the air inlet for the dehumidification circulating air connected to the dehumidification fan 5, and the other two are the air inlets for the heating circulating air connected to the heating fans (the first heating fan 10 and the second heating fan 12). Each air inlet corresponds to a part of the space, and each space is separated by a partition baffle 9, so that the corresponding air volume can be matched for this part of the space, thereby achieving the effect that the wind speed of the circulating air flowing in the corresponding space is the same and improving the ventilation uniformity.

[0049] As an optional implementation manner, in some embodiments, a distributor for releasing sludge is connected to the feed inlet of the library body 3, and a conveying assembly is arranged inside the library body 3. The conveying assembly is respectively connected with the discharge outlet of the distributor 2 and the discharge outlet of the library body 3; wherein, the conveying assembly is arranged above the dehumidification fan and the heating fan and below the condenser 19, so that the sludge 16 is dried and dehydrated by the dehumidification circulating air and the heating circulating air during the conveying process. Further, the conveying assembly includes a plurality of transmission chain meshes 15 arranged from top to bottom. The uppermost transmission chain mesh 15 is arranged below the discharge outlet of the distributor 2. The movement directions of adjacent transmission chain meshes 15 are opposite, and the heads and tails of adjacent transmission chain meshes 15 are staggered to receive and convey the sludge 16. The lowermost transmission chain mesh 15 is arranged above the discharge outlet of the library body 3. Further still, a filter 18 is also included, and the filter 18 is arranged between the condenser 19 and the conveying assembly.

[0050] Specifically, referring again to Figure 1, during the operation of this low-temperature dryer, the sludge 16 falls after being cut into strips by the distributor 2 and is spread out on the topmost transmission chain net 15. The transmission chain nets 15 are horizontally arranged in multiple layers from top to bottom within the storage body 1 and move horizontally under the drive of the motor. The sludge 16 also falls to the next layer at the end of each layer of the transmission chain net 15 and finally falls out of the discharge port of the storage body 3 from the bottommost transmission chain net 15. During this process, the heated circulating air enters from the bottom of the storage body 3, passes upward through the gaps between each layer of the transmission chain net 15 and the sludge layer in sequence, dries the wet sludge, takes away the moisture in the sludge, and then passes upward through the filter 18 and is discharged from the storage body 3 after filtration.

[0051] In addition, the above-mentioned circulating air is divided into two types, namely dehumidifying circulating air and heating circulating air. Among them, the heating circulating air is evenly divided into two streams according to the air volume, namely the first heating circulating air 8 and the second heating circulating air 11. The bottom space 7 of the storage body is divided into three parts according to the ratio of the three air volumes and separated by partition baffles 9 to ensure that the average wind speed passing through each section of the transmission chain net 15 is the same or similar, thereby improving its ventilation uniformity.

[0052] The dehumidifying circulating air 4 is sent out after being dehydrated and heated by the heat source center 1, and is sent into the bottom of the storage body 3 from one end of the storage body 3 by the dehumidifying fan 5. Subsequently, it passes upward through the transmission chain net 15 and the sludge layer, dries the sludge, takes away the moisture, and finally passes through the filter 18 and is discharged from the outlet of the storage body 3 above the filter 18. The heating circulating air passes through the condenser 19 and is heated from both sides of the upper space of the filter 18 at the top of the storage body 3, and then is sent into the bottom of the storage body 3 by the heating fan. Similarly, it then also passes upward through multiple layers of the transmission chain net 15 and the sludge layer to dry the sludge. Among them, the air inlets of the first heating fan 10 and the second heating fan 12 are staggered and respectively arranged at the middle positions of their respective intervals.

[0053] In the above-mentioned embodiment, further, wind baffle plates 17 can be installed on both sides of each layer of the transmission chain net 15, so that the circulating air can be prevented from being discharged from the feed port or the discharge port of the storage body 3.

[0054] As an alternative implementation manner, in some embodiments, a plurality of diffuser plates 20 are arranged inside the bottom of the storage body 3. The plurality of diffuser plates 20 are close to the air outlet pipe 6 of the dehumidifying fan and are inclined upward at a preset first angle. The plurality of diffuser plates 20 are distributed at a preset first interval, and the distance between the higher end of the uppermost diffuser plate 20 and the bottommost transmission chain net 15 satisfies a preset second interval.

[0055] Specifically, refer to Figure 2, a diffuser plate 20 is provided at a position where the air outlet pipe 6 of the dehumidifying fan intersects with the lower part of the wind deflector 17 to guide and diffusely spread the dehumidifying circulating air 4, so that the dehumidifying circulating air 4 can enter the bottom of the storage body 3 in an obliquely upward direction after passing through the diffuser plate 20, ensuring that the dehumidifying circulating air can be evenly distributed to each position of the transmission chain mesh 15 in the direction from the air inlet to the partition baffle 9, and drying the sludge upward through the transmission chain mesh 15 and the sludge layer. Among them, the diffuser plate 20 is a combination of strip-shaped sheet metal parts stacked in multiple layers up and down. Each diffuser plate 20 is arranged obliquely upward at a first angle α, and the adjacent diffuser plates 20 are spaced at a first distance d 1 distributed, the higher end of the uppermost diffuser plate 20 is spaced from the lowermost transmission chain mesh 15 at a second distance d2, the first angle α, the first distance d 1 and the second distance d 2 The parameters of need to ensure that the wind speed of the dehumidifying circulating air is evenly distributed when passing through the lowermost transmission chain mesh 15.

[0056] As an optional implementation manner, in some embodiments, a drainage plate is provided inside the bottom of the storage body 3. The drainage plate is arranged close to the air outlet pipe 13 of the heating fan. The drainage plate includes a drainage inclined plate 21 and a drainage flat plate 22. The lower end of the drainage inclined plate 21 is connected to the bottom of the storage body 3. The drainage inclined plate 21 is arranged obliquely upward at a preset second angle. The lower end of the drainage inclined plate 21 and the air inlet of the storage body 3 satisfy a preset third distance. The drainage flat plate 22 is arranged horizontally and one end of the drainage flat plate 22 is connected to the higher end of the drainage inclined plate 21. The drainage flat plate 22 and the lowermost transmission chain mesh 15 satisfy a preset fourth distance. The other end of the drainage flat plate 22 and the wall surface opposite to the air inlet of the storage body 3 satisfy a preset fifth distance.

[0057] Specifically, referring to Figure 3 , a drainage plate is installed at a certain distance directly below the transmission chain mesh 15 behind the air inlet of the heating circulating air. The drainage plate is divided into a drainage inclined plate 21 and a drainage flat plate 22. The drainage inclined plate 21 can further increase the inclination angle obliquely upward of the air whose direction has been initially changed by the diffuser plate 20. At the same time, the drainage flat plate 22 of the drainage plate can drain the obliquely upward air horizontally in all directions when blocked by the transmission chain mesh 15, so that the heating circulating air can be evenly distributed to each position of the transmission chain mesh 15, realizing uniform horizontal spreading in a relatively short distance and passing upward through the transmission chain mesh 15 and the sludge layer at a uniform speed, and avoiding excessive wind speed of the transmission chain mesh 15 near the wall surface due to the short distance from the air inlet to the opposite wall surface, thereby affecting its wind speed uniformity. Among them, the drainage plate longitudinally penetrates the space below the transmission chain mesh 15 corresponding to a single strand of heating air. The lower end of the drainage inclined plate 21 and the air outlet pipe 13 of the heating fan are spaced at a third distance d 3The drainage inclined plate is arranged to slope upward at a second angle β. The drainage flat plate 22 is spaced apart from the lowermost transmission chain net 15 by a fourth spacing d4. The end of the drainage flat plate 22 is spaced apart from the wall surface of the storage body 3 opposite to the air inlet by a fifth spacing d 5 apart. The second angle β and the third spacing d 3 , the fourth spacing d 4 and the fifth spacing d 5 The parameters of need to ensure that the heating circulating air has a uniform velocity distribution when passing through the lowermost transmission chain net 15. In addition, since there is a certain distance between the end of the drainage flat plate 22 and the wall surface of the storage body 3 opposite to the air inlet, a low-velocity vortex area can be formed below the drainage plate, which is used as the dust settling area 23, so as to facilitate the subsequent cleaning of the dust.

[0058] As an optional implementation manner, in some embodiments, the shape of the air outlet pipe 13 of the heating fan is trapezoidal. Among them, since the air outlet of the heating fan is rectangular and has a small cross-sectional area and is not easy to spread after entering the storage body 3, the air outlet pipe 13 of the heating fan between the air outlet of the heating fan and the storage body 3 is set to be trapezoidal, which is convenient for the preliminary diffusion of the air outlet of the heating fan and prepares for further diffusion and wind direction change through the drainage plate.

[0059] In a second aspect, the present invention provides a method for accurately controlling the air flow in the storage body of a split-type low-temperature drying equipment, based on the above-mentioned structure for accurately controlling the air flow in the storage body of the split-type low-temperature drying equipment, which specifically includes the following steps:

[0060] Step 1: Use computer-aided software to model the storage body of the split-type low-temperature drying equipment to obtain a storage body air flow control structure model; Step 2: Adjust the specification parameters of the diffuser plate and the drainage plate in the storage body air flow control structure model. By measuring the wind speeds of the circulating air at multiple positions on the leeward side of the lowermost transmission chain net in the storage body, obtain the standard deviation of the average wind speed on the leeward side of the lowermost transmission chain net in the storage body according to the wind speeds of the circulating air at multiple positions; Step 3: Compare the obtained standard deviation of the average wind speed with a preset threshold to obtain a comparison result; Step 4: Determine the storage body air flow control structure according to the comparison result.

[0061] Specifically, in the implementation process of the above-mentioned diffuser plate and drainage plate dimensions and angles, it is necessary to create a three-dimensional model in solidworks according to the actual size of the storage body, and then use CFD for wind field simulation. First, it is necessary to perform operations such as combining, splitting, naming, and sharing coincident topologies on the model wind field in Spaceclaim. The model includes the dehumidification circulating air inlet, the heating circulating air inlet, the bottom space of the storage body, the combination of the transmission chain net and the sludge layer, etc. Then, import the model with shared coincident topologies into Ansys Mesh for mesh generation (see Figure 4), where the grids at the positions with relatively complex flow fields of the diffuser plate, the drainage plate, and the windshield are refined. Then, the model with the meshes divided is imported into Fluent. In the settings panel, Double Precision is selected, and the Solver Processes is set to 6. Quality inspection and unit conversion are performed on the model meshes imported into Fluent. Select the turbulent model to calculate the turbulent motion process in the model flow field. Set air as the motion medium of the flow field, set the three air inlets as mass inlets, the outlet as a pressure outlet, and the wall as a no-slip surface boundary condition. Input the mass flow rate of the air volume at each air inlet, with the unit of kg / s. Then, use the Coupled algorithm for pressure-velocity coupling to solve the coupled continuity equation and momentum equation. The spatial discretization method in the equation uses the software default settings. Among them, the diffuser plate and the drainage plate have the functions of diffusing and equalizing the air inlet of the library body. By adjusting the specification parameters of the diffuser plate and the drainage plate, the parameters with the optimal uniformity of the lowest transmission chain network and the leeward side of the sludge layer are simulated to ensure that the standard deviation of the average wind speed is within a certain range. Preset the modeling of the sizes of the diffuser plate and the drainage plate that meet the requirements, import them into CFD for wind field simulation. After the simulation is completed, analyze and calculate the velocity cloud map of the monitoring surface (see Figure 5 ), and finally determine the first angle α, the second angle β, the first spacing d 1 , the second spacing d 2 , the third spacing d 3 , the fourth spacing d 4 and the fifth spacing d 5 . In this way, by using CFD to simulate the air inlet wind field of the library body, the optimal structural sizes of the diffuser plate and the guide plate are determined through the above steps, achieving the purpose of reducing the amount of dust generated, improving the uniformity of the moisture content of the sludge discharged, reducing dust generation, and making full use of the heat of the circulating air, and ensuring the long-term, efficient, and stable operation of the equipment.

[0062] As an alternative implementation, in some embodiments, the specific method for obtaining the standard deviation of the average wind speed on the leeward side of the lowest transmission chain network in the library body according to the specification parameters in step 2 is as follows: Set the leeward side of the lowest transmission chain network as the monitoring surface. Take m parallel line segments at equal intervals along the length direction of the transmission chain network in the width direction of the transmission chain network. The starting and ending points of the line segments are located at the starting point and the ending point of the transmission chain network respectively, and n wind speed value points are set at equal intervals on each line segment. Calculate the standard deviation σ of the average wind speed of each line segment in this way. Among them, the calculation formula for the standard deviation σ of the average wind speed is as follows:

[0063]

[0064] In the formula, σ is the standard deviation of the average wind speed of each value point line segment on the leeward side of the lowest transmission chain network; is the average value of the wind speed data at each point on a single line segment; v i is the measured point velocity data, n is the number of wind speed measurement points on each value-taking line segment, m is the number of line segments, is the average value of the average wind speeds of all line segments.

[0065] Specifically, by calculating the standard deviation of the average wind speed through the above formula and then cooperating with the velocity nephogram of the monitoring surface, it is necessary to ensure that the standard deviation of the average wind speed is controlled within 17%. It can be determined that when the first angle ∝ = 45°, the second angle β = 45°, the first spacing d 1 = 200 mm, the second spacing d 2 = 350 mm, the third spacing d 3 = 250 mm, the fourth spacing d 4 = 300 mm and the fifth spacing d 5 = 300 mm, at this time, the standard deviation of the average wind speed of this monitoring surface is 14.5%, which is within the control range.

[0066] In the above embodiment, further, the comparison criterion in step 3 is: if the standard deviation of the average wind speed is less than the preset threshold, then proceed to step 4; if the standard deviation of the average wind speed is not less than the preset threshold, then return to step 2. Among them, if the calculated standard deviation of the average wind speed is less than the preset threshold of 17%, it means that the air distribution uniformity of the bottom transmission chain network and the sludge layer is good and meets the optimization requirements; if the calculated standard deviation of the average wind speed is greater than or equal to the preset threshold of 17%, it is necessary to judge the position of the high wind speed area of the monitoring surface according to the calculated standard deviation of the average wind speed, adjust the size parameters of the diffuser plate and the drainage plate, and re-verify (see Figure 6 ).

[0067] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0068] The above embodiments are only used to illustrate the technical concept and features of the present invention. The purpose is to enable those of ordinary skill in the art to understand the content of the present invention and implement it accordingly, and it should not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made based on the essence of the content of the present invention should be covered within the protection scope of the present invention.

Claims

1. A precise wind control structure for a split low-temperature drying equipment storehouse, characterized in that: include: The bottom of the storage body is connected to a dehumidifying fan and a heating fan through air ducts, and a condenser is arranged in the top of the storage body, and the condenser is connected to the heating fan through a pipeline; A heat source center is arranged outside the storage body, and the heat source center is connected to the dehumidification fan and the storage body through a pipeline; Among them, corresponding spaces are separated by partition baffles in the bottom of the storage body, and according to the air volume of the dehumidification circulating air generated by the dehumidification fan and the heating circulating air generated by the heating fan, diffuser plates or guide plates are arranged in the corresponding spaces to make the circulating air diffuse and spread horizontally and vertically, so that the wind speed at each position is the same when the circulating air flows toward the top of the storage body.

2. The precise wind control structure of the split-type low-temperature drying equipment storehouse according to claim 1 is characterized in that: The feed inlet of the storage body is connected to a distributor for releasing sludge, and a conveying component is arranged in the storage body, and the conveying component is respectively connected to the discharge port of the distributor and the discharge port of the storage body; The conveying assembly is arranged above the dehumidification fan and the heating fan and below the condenser, so that the sludge is dried and dehydrated by the dehumidification circulating air and the heating circulating air during the conveying process.

3. The precise wind control structure of the split-type low-temperature drying equipment storehouse according to claim 2 is characterized in that: The conveying assembly includes a plurality of conveying chain nets arranged from top to bottom, the top conveying chain net is arranged below the discharge port of the distributor, the movement directions of adjacent conveying chain nets are opposite and the head ends and tail ends of adjacent conveying chain nets are staggered to receive and convey sludge, and the bottom conveying chain net is arranged above the discharge port of the storage body.

4. The precise wind control structure of the split-type low-temperature drying equipment storehouse according to claim 3 is characterized in that: A plurality of diffuser plates are arranged at the bottom of the storage body, and the diffuser plates are close to the air outlet pipe of the dehumidification fan and are inclined upward at a preset first angle. The diffuser plates are distributed at a preset first spacing, and a preset second spacing is satisfied between the higher end of the top diffuser plate and the bottom transmission chain network.

5. The precise wind control structure of the split-type low-temperature drying equipment storehouse according to claim 3 is characterized in that: The guide plate is arranged at the bottom of the storage body, and the guide plate is arranged close to the air outlet pipe of the heating fan. The guide plate includes a guide inclined plate and a guide flat plate. The lower end of the guide inclined plate is connected to the bottom of the storage body, and the guide inclined plate is inclined upward at a preset second angle. The lower end of the guide inclined plate and the air inlet of the storage body meet a preset third distance. The guide flat plate is horizontally arranged and one end of the guide flat plate is connected to the higher end of the guide inclined plate. The guide flat plate and the lowermost transmission chain network meet a preset fourth distance, and the other end of the guide flat plate and the wall surface opposite to the air inlet of the storage body meet a preset fifth distance.

6. The precise wind control structure of the split-type low-temperature drying equipment storehouse according to claim 2 is characterized in that: Also included is a filter disposed between the condenser and the delivery assembly.

7. The precise wind control structure of the split-type low-temperature drying equipment storehouse according to claim 1 is characterized in that: The air outlet pipe of the heating fan is in a trapezoidal shape.

8. A method for precise air control of a split-type low-temperature drying equipment storehouse, based on the precise air control structure of a split-type low-temperature drying equipment storehouse as claimed in any one of claims 1 to 7, comprising the following steps: Step 1: Model the split-type low-temperature drying equipment warehouse through computer-aided software to obtain the warehouse wind control structure model; Step 2: Adjust the specification parameters of the diffuser and guide plate in the wind control structure model of the silo, measure the wind speed of the circulating wind at multiple locations on the leeward side of the transmission chain net at the bottom of the silo, and obtain the standard deviation of the average wind speed on the leeward side of the transmission chain net at the bottom of the silo according to the wind speed of the circulating wind at multiple locations; Step 3: Compare the obtained standard deviation of the average wind speed with the preset threshold value to obtain a comparison result; Step 4: Determine the warehouse wind control structure based on the comparison results.

9. The precise air control method for a split-type low-temperature drying equipment storehouse according to claim 8 is characterized in that: The specific method of obtaining the standard deviation of the average wind speed on the leeward side of the lowest transmission chain network in the storage body according to the specification parameters in step 2 is: The leeward side of the lowest transmission chain network is set as the monitoring surface, and m parallel line segments are taken at equal intervals along the length direction of the transmission chain network in the width direction of the transmission chain network. The end points of the line segments are respectively located at the starting point and the end point of the transmission chain network, and n wind speed value points are set at equal intervals on each line segment to calculate the standard deviation σ of the average wind speed of each line segment; The calculation formula of the standard deviation σ of the average wind speed is as follows: Where σ is the standard deviation of the average wind speed of each value point line segment on the leeward side of the lowest transmission chain network; is the average wind speed data of each point on a single line segment; v i is the speed data of the measuring point, n is the number of wind speed test points on each value line segment, m is the number of line segments, is the average of the average wind speeds of all segments.

10. The precise air control method for a split-type low-temperature drying equipment storehouse according to claim 8 is characterized in that: The comparison standard of step 3 is: If the standard deviation of the average wind speed is less than the preset threshold, proceed to step 4; If the standard deviation of the average wind speed is not less than the preset threshold, return to step 2.

Images