A waste heat utilization device and a method of using the same

Abstract

The application relates to a waste heat utilization device and a use method thereof, and relates to the technical field of waste heat utilization. A second waste heat recovery unit is movably arranged in a first waste heat recovery unit of the waste heat utilization device, a receiving gap is formed between the first waste heat recovery unit and the second waste heat recovery unit, a receiving cavity is arranged in the second waste heat recovery unit, the receiving gap and the receiving cavity are respectively used for receiving coal gangue powder with different temperatures, and when the first waste heat recovery unit and the second waste heat recovery unit are driven to rotate by a driving unit, the coal gangue powder in the receiving gap and the receiving cavity is synchronously moved to realize heat exchange. The waste heat utilization device provided by the application can simultaneously receive the coal gangue powder with high temperature after activation and the coal gangue powder at normal temperature to be activated, when the first waste heat recovery unit and the second waste heat recovery unit rotate simultaneously, the coal gangue powder at normal temperature fully absorbs the heat of the coal gangue powder with high temperature, is heated to realize the preheating purpose before activation, and can effectively cool the coal gangue powder with high temperature.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste heat utilization, in particular to a waste heat utilization device and a use method thereof. BACKGROUND

[0002] At present, coal gangue is one of by-products in coal production. Since coal gangue is a volcanic ash mixed material, it has almost no hydraulic cementitious material, and thus needs to be excited under certain physical and chemical excitation to change the chemical composition and internal structure of coal gangue, so as to improve the physical and chemical properties thereof.

[0003] Calcination heating is an effective means to excite activity, and the purpose is to use the intense thermal motion of each particle in the microstructure of coal gangue at high temperature to remove the combined water, calcium, magnesium, iron and other cations in the mineral to reselect interstitial positions, so as to form a glass phase structure in a thermodynamic unstable state, thereby making the calcined coal gangue contain a large amount of active silicon oxide and aluminum oxide to achieve the purpose of activation. In the process of activation heating, a large amount of heat is needed for coal gangue, but only a part of the heat is absorbed, and most of the remaining heat cannot be effectively utilized, resulting in resource waste.

[0004] In the related art, in order to avoid resource waste, the part of heat that cannot be effectively utilized in the process of activating and heating coal gangue is transferred to other processes, such as increasing the air supply pipeline to transport hot air and improving the utilization rate of heat. However, the temperature of the activated coal gangue is very high, and this part of heat energy is often neglected, and instead an additional cold source is needed to cool it down. In addition, the previous heat energy utilization method often has a large heat loss during transportation and has a low utilization rate. SUMMARY

[0005] Embodiments of the present application provide a waste heat utilization device and a use method thereof to solve the problem of incomplete utilization of heat energy in the process of activating and heating coal gangue in the related art, resulting in energy waste and high production cost.

[0006] In one aspect, the present application provides a waste heat utilization device, which comprises:

[0007] A first waste heat recovery unit, a second waste heat recovery unit is movably arranged in the first waste heat recovery unit, and a receiving gap is formed between the first waste heat recovery unit and the second waste heat recovery unit, and the second waste heat recovery unit is provided with a receiving cavity;

[0008] A driving unit; wherein,

[0009] The receiving gap and the receiving cavity are respectively used for receiving coal gangue powder at different temperatures, and the driving unit is used for driving the first waste heat recovery unit and the second waste heat recovery unit to rotate respectively, so as to drive the coal gangue powder in the receiving gap and the receiving cavity to move synchronously to realize heat exchange.

[0010] In some embodiments, the first waste heat recovery unit is provided with an inlet opening at one end thereof, the inlet opening is provided with a first guide therein, the first guide is in the shape of a circular truncated cone, and is used to guide the coal gangue powder flowing into the inlet opening to flow into the accommodation gap.

[0011] In some embodiments, the inlet opening is provided with a plurality of baffle plates arranged at intervals in the circumferential direction, the baffle plates are in the shape of an arc and are arranged in an inclined manner, and are used to guide the coal gangue powder flowing into the inlet opening to flow to the first guide.

[0012] In some embodiments, the first waste heat recovery unit is provided with at least one first support assembly located in the accommodation gap, the first support assembly comprises at least three support rods arranged at intervals in the circumferential direction, one end of each support rod is connected to the inner wall of the first waste heat recovery unit, and the other end is connected to the outer wall of the second waste heat recovery unit in a rolling manner.

[0013] In some embodiments, one end of the second waste heat recovery unit at least partially extends out of the end of the first waste heat recovery unit provided with the inlet opening, and the end is rotatably connected with a feeding assembly, the feeding assembly comprises a feeding channel, the feeding channel is provided with a second guide at the outlet thereof, the second guide is in the shape of a circular truncated cone, and is used to guide the coal gangue powder flowing into the feeding channel to flow into the accommodation cavity.

[0014] In some embodiments, the first waste heat recovery unit and the second waste heat recovery unit are both in the shape of a cylinder, and the inner wall of each is provided with at least one propelling strip arranged in a spiral manner, the propelling strips are used to drive the coal gangue powder in the accommodation gap and the accommodation cavity, respectively, to move directionally when the first waste heat recovery unit and the second waste heat recovery unit rotate.

[0015] In some embodiments, the driving unit comprises a first driving gear and a second driving gear, the first driving gear is fixedly sleeved on the first waste heat recovery unit, the second driving gear is engaged with the first driving gear, and is used to drive the first driving gear to rotate the first waste heat recovery unit under the driving of the driving motor.

[0016] In some embodiments, the waste heat utilization device comprises a workbench, one end of the workbench is fixedly provided with the feeding assembly, and the workbench is provided with at least two second support assemblies arranged at intervals in the length direction thereof, the second support assemblies are used to support the first waste heat recovery unit and are connected to the first waste heat recovery unit in a rolling manner.

[0017] In some embodiments, the second support assembly comprises a support table and a bearing, the support table is provided with two symmetrically arranged rollers, and the bearing is sleeved on the first waste heat recovery unit and is connected to the rollers in a rolling manner.

[0018] In a second aspect, the application provides a method for using the waste heat utilization device, which is used to implement the above waste heat utilization device, and the steps include:

[0019] Injecting coal gangue powder with different temperatures into the accommodation gap and the accommodation cavity, respectively;

[0020] Driving the first waste heat recovery unit and the second waste heat recovery unit to rotate, so as to drive the coal gangue powder in the accommodation gap and the accommodation cavity to move synchronously to realize heat exchange.

[0021] The technical scheme provided by the application has the beneficial effects including:

[0022] The waste heat utilization device provided by the embodiment of the application has the following beneficial effects: the second waste heat recovery unit is movably arranged in the first waste heat recovery unit, and the accommodation gap is formed between the first waste heat recovery unit and the second waste heat recovery unit; the accommodation cavity is arranged in the second waste heat recovery unit; the accommodation gap and the accommodation cavity are used to accommodate coal gangue powder with different temperatures; when the driving unit drives the first waste heat recovery unit and the second waste heat recovery unit to rotate, the coal gangue powder in the accommodation gap and the accommodation cavity is driven to move synchronously to realize heat exchange; therefore, the waste heat utilization device can simultaneously receive coal gangue powder with high temperature after activation and coal gangue powder at normal temperature to be activated; when the first waste heat recovery unit and the second waste heat recovery unit rotate simultaneously, the coal gangue powder at normal temperature can fully absorb the heat of the coal gangue powder with high temperature to be activated, so as to be heated to realize the purpose of preheating before activation; meanwhile, the coal gangue powder with high temperature can be effectively cooled; in addition, the waste heat utilization device directly receives the coal gangue powder with high temperature after activation, so as to reduce the heat loss in heat utilization as much as possible and improve the heat utilization rate. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0024] Figure 1 The cross-sectional view of the waste heat utilization device provided by the embodiment of the application;

[0025] Figure 2 The structural view of the waste heat utilization device provided by the embodiment of the application;

[0026] Figure 3 The side view of the waste heat utilization device provided by the embodiment of the application in the discharging direction;

[0027] Figure 4 A structural schematic diagram of a second support assembly of a waste heat utilization device provided by an embodiment of the present application.

[0028] In the figure: 1 - first waste heat recovery unit, 10 - containing gap, 11 - feeding port, 12 - first guide, 13 - baffle, 14 - support rod, 2 - second waste heat recovery unit, 20 - containing cavity, 21 - feeding assembly, 210 - feeding channel, 211 - second guide, 3 - driving unit, 30 - first driving gear, 31 - second driving gear, 4 - workbench, 40 - second support assembly, 400 - support table, 401 - bearing, 402 - roller, 403 - limiting bump, 5 - pushing strip. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0030] The embodiments of the present application provide a waste heat utilization device, which can solve the problems of incomplete heat energy utilization, energy waste and high production cost in the process of activating and heating coal gangue in the related art.

[0031] Reference is made to Figure 1 and Figure 2As shown, the waste heat utilization equipment includes a first waste heat recovery unit 1, a second waste heat recovery unit 2 and a driving unit 3, the second waste heat recovery unit 2 is movably arranged in the first waste heat recovery unit 1 and forms a receiving gap 10 with the first waste heat recovery unit 2, that is, the second waste heat recovery unit 2 is movably suspended in the first waste heat recovery unit 1, and the second waste heat recovery unit 2 is provided with a receiving cavity 20; wherein the receiving gap 10 and the receiving cavity 20 are respectively used for receiving coal gangue powder of different temperatures, the coal gangue powder of different temperatures mainly refers to the coal gangue powder with high temperature after activation and the coal gangue powder at normal temperature before activation, the receiving cavity 20 can receive the coal gangue powder with high temperature or the coal gangue powder at normal temperature, compared with the receiving cavity 20 receiving the coal gangue powder at normal temperature, the receiving gap 10 receives the coal gangue powder with high temperature, and another receiving mode can make the coal gangue powder at normal temperature better cool the coal gangue powder with high temperature, that is, can absorb as much heat as possible, therefore, preferably, the receiving cavity 20 receives the coal gangue powder with high temperature, and the receiving gap 10 receives the coal gangue powder at normal temperature; the driving unit 3 is used for driving the first waste heat recovery unit 1 and the second waste heat recovery unit 2 to rotate respectively, after the first waste heat recovery unit 1 and the second waste heat recovery unit 2 rotate, the coal gangue powder of different temperatures in the receiving gap 10 and the receiving cavity 20 can be driven to move synchronously, ensure contact, and the rotating process also makes the coal gangue powder fully heat or absorb heat, ensure uniformity and heat absorption efficiency. The waste heat utilization equipment fully utilizes the heat of the coal gangue powder with high temperature after activation, preheats the coal gangue powder at normal temperature to be activated, and also cools itself, which is ingenious; in addition, the waste heat utilization equipment directly receives the coal gangue powder with high temperature after activation, reduces heat loss in heat utilization as much as possible, and improves heat utilization rate.

[0032] Further, referring to Figure 1 and Figure 2As shown, since the coal gangue powder with high temperature after activation needs to be directly received, one end of the first waste heat recovery unit 1 is provided with a feed inlet 11 distributed along the circumference thereof, the feed inlet 11 is arranged along the circumference of the first waste heat recovery unit 1, that is, when the first waste heat recovery unit 1 is in the process of rotating, the coal gangue powder poured from the corresponding position can also enter the first waste heat recovery unit 1, which can realize dynamic feeding. In order to ensure that the coal gangue powder poured through the feed inlet 11 can smoothly enter the accommodation gap 10 and not form accumulation at the feed inlet 11 to affect feeding, the feed inlet 11 can be provided with a first guide 12, the first guide 12 can be a circular truncated cone, that is, the shape of the first guide 12 gradually increases or decreases from one end to the other end, wherein the larger end of the first guide 12 is connected with the feed inlet 11, and the smaller end extends into the accommodation gap 10, therefore, when the coal gangue powder enters from the feed inlet 11, it falls on the surface of the first guide 12, the first guide 12 is used to guide the coal gangue powder entering the feed inlet 11 to flow into the accommodation gap 10, so as to ensure the smooth feeding of the feed inlet 11.

[0033] Further, referring to Figure 2 As shown, since the feed inlet 11 is circumferentially provided, in order to prevent the coal gangue powder from leaking out from the bottom of the feed inlet 11 when pouring, the feed inlet 11 can be provided with a plurality of circumferentially spaced baffles 13, each baffle 13 is arc-shaped and is inclinedly arranged in the feed inlet 11, that is, the baffle 13 is arranged in the feed inlet 11 along the direction parallel to the movement of the coal gangue powder, the baffle 13 is used to guide the coal gangue powder entering the feed inlet 11 to flow to the first guide 12, and the inclined arrangement can make the coal gangue powder even leak downward during pouring, which will only fall on the baffle 13, avoiding the leakage of the coal gangue powder; the distance between the adjacent two baffles 13 is generally related to the amount of coal gangue powder during feeding, generally, when feeding from the top, the coal gangue powder will fall on the first guide 12 from between the two baffles 13 located at the top, therefore, the distance between the adjacent two baffles 13 can be adjusted according to actual needs.

[0034] Further, referring to Figure 3As shown, the first waste heat recovery unit 1 is provided with at least one first support assembly located in the accommodation gap 10, the first support assembly comprising at least three support rods 14 arranged in a circumferential direction, that is, a plurality of support rods 14 are arranged in a circumferential direction along the inner wall of the first waste heat recovery unit 1, one end of each support rod 14 is connected with the inner wall of the first waste heat recovery unit 1, and the other end is rollingly connected with the outer wall of the second waste heat recovery unit 2, for supporting the second waste heat recovery unit 2 suspended in the first waste heat recovery unit 1 without interfering with the rotation of the second waste heat recovery unit 2; wherein the length of each support rod 14 is the same, so that the size of the accommodation gap 10 is uniform, and a ball is arranged on the end of the support rod 14 away from the first waste heat recovery unit 1 to realize the rolling connection with the second waste heat recovery unit 2. Since the first waste heat recovery unit 1 and the second waste heat recovery unit 2 both have a relatively long length, the coal gangue powder in the accommodation gap 10 and the accommodation cavity 20 has a long enough moving distance, so that sufficient heat exchange is realized, therefore, the number of the first support assembly is preferably multiple. In addition, the end of the first waste heat recovery unit 1 provided with the feed inlet 11 extends inwardly to form an extension edge, a ring of wear-resistant soft rubber is arranged on the edge of the extension edge, and the extension edge is used to assist the first support assembly in supporting the second waste heat recovery unit 2.

[0035] Further, referring to Figure 2 As shown, one end of the second waste heat recovery unit 2 at least partially extends out of the end of the first waste heat recovery unit 1 provided with the feed inlet 11, and a feed assembly 21 is rotatably connected to the end, the feed assembly 21 specifically comprising a feed channel 210, that is, the feed channel 210 is in communication with the accommodation cavity 20, and the coal gangue powder can enter the accommodation cavity 20 from the inlet of the feed channel 210; a second guide 211 is further arranged at the outlet of the feed channel 210, the second guide 211 is in the shape of a circular truncated cone, and its structure and function are similar to those of the first guide 12, the second guide 211 is used to guide the coal gangue powder entering the feed channel 210 to smoothly flow into the accommodation cavity 20, preventing the coal gangue powder from accumulating at the inlet of the feed channel 210 and affecting the feeding. In order to facilitate feeding and ensure stable feeding, the feed assembly 21 is fixedly arranged on the platform and rotatably connected with the second waste heat recovery unit 2, the shape of the feed channel 210 can be square, circular or even oblate, which can be selected according to actual conditions.

[0036] Further, referring to Figure 1 and Figure 2As shown, the first waste heat recovery unit 1 and the second waste heat recovery unit 2 are both in a long strip shape, and in the embodiment, the first waste heat recovery unit 1 and the second waste heat recovery unit 2 are both in a cylindrical shape, and at least one propelling strip 5 is arranged on the inner wall of the first waste heat recovery unit 1 and the second waste heat recovery unit 2, the propelling strip 5 is mainly used to drive the directional movement of the coal gangue powder in the containing gap 10 and the containing cavity 20 respectively when the first waste heat recovery unit 1 and the second waste heat recovery unit 2 rotate, the number of the propelling strip 5 can be at least one, and the propelling strip 5 can be a continuous spiral structure when the number is one, and the propelling strip 5 can be a continuous spiral structure or a short piece structure when the number is more than one, the propelling strips 5 are arranged along the spiral path, and in the embodiment, the number of the propelling strip 5 is preferably more than one, and the propelling strip 5 is a short piece structure, compared with the continuous spiral structure with a long length, the short piece structure can slow down the moving speed of the coal gangue powder to a certain extent, so as to realize sufficient heat exchange; when the propelling strip 5 is a short piece structure, each propelling strip 5 is in an arc shape, and the radial dimension of the propelling strip 5 increases or decreases from one end to the other end, so as to reduce the coal gangue powder which can be blocked by the propelling strip 5 as much as possible.

[0037] Further, referring to Figure 1 and Figure 2 As shown, the driving unit 3 specifically includes a first driving gear 30 and a second driving gear 31, wherein the first driving gear 30 has a large size, the first driving gear 30 is sleeved and fixed on the first waste heat recovery unit 1, the second driving gear 31 has a small size and is meshed with the first driving gear 30, the driving unit 3 further includes a driving motor, the driving motor is used to drive the second driving gear 31 to drive the first driving gear 30 to rotate the first waste heat recovery unit 1, and the rotation driving of the second waste heat recovery unit 2 can adopt gear driving, and can also adopt the form of direct driving of the driving motor. In addition, the first waste heat recovery unit 1 and the second waste heat recovery unit 2 can both be infinitely variable, and the rotation speeds of the two can be the same or different, so as to adapt to the heat exchange efficiency of the coal gangue powder with different temperatures.

[0038] Further, referring to Figure 2 and Figure 4 As shown, the waste heat utilization equipment further includes a workbench 4, the workbench 4 is fixed on the platform or the ground, and the height of the workbench 4 can be flexibly set according to the actual situation, wherein one end of the workbench 4 is fixed with a feeding assembly 21, and in order to support the first waste heat recovery unit 1, the workbench 4 is provided with at least two second supporting assemblies 40 which are arranged at intervals along the length direction of the workbench 4, the second supporting assemblies 40 are used to support the first waste heat recovery unit 1 and are in rolling connection with the first waste heat recovery unit 1, so as to meet the rotation of the first waste heat recovery unit 1.

[0039] Further, referring toFigure 4 As shown, the second support assembly 40 specifically comprises a support table 400 and a bearing 401, the support table 400 is provided with two symmetrically arranged rollers 402, the bearing 401 is sleeved on the first waste heat recovery unit 1 and rests on the rollers 402 in rolling connection with the rollers 402; in order to prevent the bearing 401 from moving along the length direction of the workbench 4, the support table 400 is provided with two limiting protrusions 403, the two limiting protrusions 403 are arranged between the two rollers 402 to limit the movement of the bearing 401 along the length direction of the workbench 4.

[0040] The application also provides a use method of the waste heat utilization equipment, which is used for implementing the above waste heat utilization equipment, and the steps specifically include: injecting coal gangue powder with different temperatures into the accommodation gap 10 and the accommodation cavity 20 respectively and simultaneously, driving the first waste heat recovery unit 1 and the second waste heat recovery unit 2 to rotate, and driving the coal gangue powder in the accommodation gap 10 and the accommodation cavity 20 to move synchronously in the process of rotating the first waste heat recovery unit 1 and the second waste heat recovery unit 2, so as to realize heat exchange, the heat of the coal gangue powder with a higher temperature is taken away to reduce the temperature, and the coal gangue powder with a lower temperature absorbs heat to increase the temperature, so that the activated coal gangue powder with a higher temperature is cooled and the preheating of the coal gangue powder to be activated is realized at the same time, the heat energy is fully utilized, the process is saved, the process cost is reduced, and the efficiency is accelerated.

[0041] Among them, the other steps of the use method of the waste heat utilization equipment correspond one by one to the specific structure and function of the above waste heat utilization equipment, which will not be described in detail here.

[0042] In the description of the present application, it should be noted that the positions or position relationships indicated by the terms "upper", "lower" and the like are based on the positions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] It should be noted that, in the present application, the relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0044] The foregoing is merely illustrative of the principles of the application and various modifications can be made by those skilled in the art without departing from the spirit and scope of the application. The above embodiments are illustrative, and not restrictive, of the scope of the application.

Claims

1. A waste heat utilization apparatus characterized by comprising: The utility model relates to a waste heat utilization equipment, which comprises the following steps: a first waste heat recovery unit (1) is movably arranged in a second waste heat recovery unit (2), and a receiving gap (10) is formed between the first waste heat recovery unit (1) and the second waste heat recovery unit (2); the second waste heat recovery unit (2) is provided with a receiving cavity (20); a driving unit (3); wherein the receiving gap (10) and the receiving cavity (20) are used for receiving coal gangue powder at different temperatures, and the driving unit (3) is used for driving the first waste heat recovery unit (1) and the second waste heat recovery unit (2) to rotate respectively, so that the coal gangue powder in the receiving gap (10) and the receiving cavity (20) moves synchronously to realize heat exchange; one end of the first waste heat recovery unit (1) is provided with an inlet (11) distributed along the circumference thereof, the inlet (11) is provided with a first guide (12), and the first guide (12) is in the shape of a circular truncated cone, so as to guide the coal gangue powder entering the inlet (11) to flow into the receiving gap (10); a plurality of baffle plates (13) are arranged in the inlet (11) at intervals along the circumference, the baffle plates (13) are in the shape of an arc and are arranged obliquely, so as to guide the coal gangue powder entering the inlet (11) to flow towards the first guide (12); the first waste heat recovery unit (1) is provided with at least one first support assembly located in the receiving gap (10), the first support assembly comprises at least three support rods (14) arranged at intervals along the circumference, one end of the support rod (14) is connected to the inner wall of the first waste heat recovery unit (1), and the other end is connected to the outer wall of the second waste heat recovery unit (2) in a rolling manner.

2. The waste heat utilization equipment according to claim 1, wherein: one end of the second waste heat recovery unit (2) at least partially extends out of the end of the first waste heat recovery unit (1) provided with the inlet (11), and a feeding assembly (21) is rotatably connected to the end, the feeding assembly (21) comprises a feeding channel (210), and a second guide (211) is arranged at the outlet of the feeding channel (210), the second guide (211) is in the shape of a circular truncated cone, so as to guide the coal gangue powder entering the feeding channel (210) to flow into the receiving cavity (20).

3. The waste heat utilization equipment according to claim 1, wherein: the first waste heat recovery unit (1) and the second waste heat recovery unit (2) are both in the shape of a cylinder, and at least one propelling strip (5) is arranged in a spiral manner on the inner wall of each of the first waste heat recovery unit (1) and the second waste heat recovery unit (2), the propelling strip (5) is used for driving the coal gangue powder in the receiving gap (10) and the receiving cavity (20) to move directionally when the first waste heat recovery unit (1) and the second waste heat recovery unit (2) rotate respectively.

4. The waste heat utilization equipment according to claim 1, wherein: The driving unit (3) comprises a first driving gear (30) and a second driving gear (31), the first driving gear (30) is fixedly sleeved on the first waste heat recovery unit (1), the second driving gear (31) is engaged with the first driving gear (30) and is used for driving the first driving gear (30) to drive the first waste heat recovery unit (1) to rotate under the driving of the driving motor.

5. The waste heat utilization equipment according to claim 2, characterized in that: The waste heat utilization equipment comprises a workbench (4), one end of the workbench (4) is fixed with the feeding assembly (21), and the workbench (4) is provided with at least two second support assemblies (40) which are arranged at intervals along the length direction of the workbench (4) and are used for supporting and rolling connection with the first waste heat recovery unit (1).

6. The waste heat utilization equipment according to claim 5, characterized in that: The second support assembly (40) comprises a support table (400) and a bearing (401), the support table (400) is provided with two symmetrical rollers (402), and the bearing (401) is sleeved on the first waste heat recovery unit (1) and is rolling connected with the rollers (402).

7. A method of using a waste heat utilization apparatus for implementing the waste heat utilization apparatus according to claim 1, characterized by, The steps comprise: Injecting coal gangue powder with different temperatures into the accommodation gap (10) and the accommodation cavity (20) respectively; Driving the first waste heat recovery unit (1) and the second waste heat recovery unit (2) to rotate, so as to drive the coal gangue powder in the accommodation gap (10) and the accommodation cavity (20) to move synchronously to realize heat exchange.

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