CN115682008A - Waste heat utilization device based on energy conservation and emission reduction of thermal power plant - Google Patents

Abstract

The invention relates to the field of waste heat utilization devices, and discloses a waste heat utilization device based on energy saving and emission reduction in thermal power plants. Medium supply equipment; heat exchange components, the heat exchange components are arranged in the heat exchange cavity, the heat source inlet is connected to the heat source medium supply equipment, the heat source outlet is connected to the filter cavity, and the heat exchange medium enters the heat exchange cavity for heat exchange and then flows out of the heat exchange cavity The filter assembly is set in the filter cavity, and the heat source medium is filtered and discharged out of the device shell; the heat exchange adjustment assembly is connected to the heat exchange assembly, filter assembly and heat source medium supply equipment, and is used to regulate the heat exchange process; it can collect heat exchange Process data information, and automatic control of waste heat utilization based on data information, is conducive to improving the utilization rate of waste heat, and filtering the exhaust gas to reduce pollution, and the equipment is easy to maintain and the maintenance cost is low.

Description

A waste heat utilization device based on energy saving and emission reduction in thermal power plants

technical field

The invention belongs to the field of waste heat utilization devices, in particular to a waste heat utilization device based on energy saving and emission reduction in thermal power plants.

Background technique

Due to the negative impact of people on highly developed industries, it has led to three global crises: resource shortages, environmental pollution, and ecological damage. Thermal power plants are factories that use combustible objects as fuel for electricity production. When burning, they heat water. Generate water vapor, the steam can drive the steam turbine to rotate, and the steam turbine can drive the generator to rotate to generate electricity.

However, most waste heat utilization devices based on energy saving and emission reduction in thermal power plants have the following problems:

1. Existing waste heat utilization devices based on energy saving and emission reduction in thermal power plants have a small range of waste heat contact with the water surface, and can only heat a specified range at the same time. It is inconvenient to quickly and effectively heat the liquid in the device, and the heating effect is poor.

2. When the existing waste heat utilization device based on energy saving and emission reduction in thermal power plants recovers waste heat, it needs to filter the smoke and dust impurities, and the filter screen is prone to clogging after the smoke is filtered for a long time, resulting in low filtration efficiency.

Therefore, we propose a waste heat utilization device based on energy saving and emission reduction in thermal power plants, in order to solve the problems raised above. It is a problem that those skilled in the art need to solve urgently.

Contents of the invention

The purpose of the present invention is to provide a waste heat utilization device based on energy saving and emission reduction in thermal power plants, so as to solve the technical problems of insufficient utilization of waste heat in traditional thermal power plants and inconvenient maintenance of equipment.

In order to solve the problems of the technologies described above, the specific technical solutions of the present invention are as follows:

In some embodiments of the present application, a waste heat utilization device based on energy saving and emission reduction in thermal power plants is provided, including:

The device housing, the middle part is divided into a heat exchange chamber and a filter chamber by a partition, the heat exchange chamber is connected with a heat exchange medium input pipe and a heat exchange medium output pipe, and the heat exchange medium input pipe is connected with a heat exchange medium supply device, The heat exchange medium output pipe communicates with the heat exchange chamber;

The heat exchange assembly, the heat exchange components are arranged in the heat exchange chamber, the heat source inlet is connected to the heat source medium supply equipment, the heat source outlet is connected to the filter chamber, and the heat exchange medium enters the heat exchange chamber for heat exchange and then flows out of the heat exchange chamber. The heat exchange chamber;

The filter assembly is arranged in the filter chamber, the heat source medium exchanges heat with the heat exchange medium in the heat exchange chamber, and is filtered by the filter assembly before being discharged from the device casing;

The heat exchange adjustment component is connected to the heat exchange component, the filter component and the heat source medium supply device, and is used to regulate the heat exchange process.

Preferably, in one embodiment of the waste heat utilization device based on energy saving and emission reduction in thermal power plants, the heat exchange assembly includes:

An input main pipeline, one end of which is connected to the heat source medium output pipeline of the heat source medium supply equipment, and the other end penetrates into the heat exchange chamber;

A heat exchange component, the inside of which is a channel structure, is arranged in the heat exchange chamber, and its input end is connected to the corresponding end of the input main pipeline for transferring heat source medium;

The output main pipe, its input end is connected with the output end of the heat exchange component, and its output end passes through the partition plate and enters the filter chamber.

Preferably, in one embodiment of the waste heat utilization device based on energy saving and emission reduction in thermal power plants, the heat exchange components include:

A heat exchange main pipe, the two ends of which are respectively connected to the input main pipe and the output main pipe;

A plurality of branch exchange pipes are provided, distributed in a circular array outside the heat exchange main pipe, and both ends communicate with corresponding ends of the heat exchange main pipe through pipelines.

Specifically, the flow direction of the heat source medium is opposite to the flow direction of the heat exchange medium.

Preferably, in one embodiment of the waste heat utilization device based on energy saving and emission reduction in thermal power plants, the filter assembly includes:

a filter screen component, the filter screen component is connected in the filter cavity, and divides the filter cavity into two parts;

The brush adjustment mechanism 1 is provided with an adjustment guide rail part and a movable mounting seat capable of moving along the guide rail, the adjustment guide rail is arranged between the partition plate and the filter screen part, and its two ends are respectively connected to the filter cavity on the opposite side wall of the

The second brush adjustment mechanism is arranged on the movable mounting seat of the first brush adjustment mechanism;

The brush part is fixed on the moving part of the second brush adjustment mechanism;

The second brush adjustment mechanism can drive the brush component to move axially along the filter chamber so that it can fit/separate from the filter screen component; the first brush adjustment mechanism can drive the passing brush The components move along the radial direction of the filter cavity, so that the brush component moves from one end to the other end of the filter component, and reciprocally brushes the filter component;

The suction part is arranged at the opening end of the filter cavity, and is used to suck out the heat source medium after heat exchange from the filter cavity.

Preferably, in one embodiment of the waste heat utilization device based on energy saving and emission reduction in thermal power plants, a mixing mechanism is also included, including:

The rotating sleeve is sleeved on the outside of the main input pipeline, one end of which passes through the device casing, and the other end extends into the heat exchange chamber, and its inner wall and outer wall are respectively connected to the inner wall of the main input pipeline. A dynamic sealing structure is formed at the corresponding part of the device housing, and is rotatably connected with it;

There are a plurality of rotating connecting rods, all of which are arranged in the heat exchange chamber, and are distributed in a circular array on the outside of the rotating sleeve, and one end of each rotating connecting rod is connected to the corresponding end of the rotating sleeve. The outer wall of the end is fixedly connected;

The stirring assembly includes two ring-shaped parts arranged in parallel, and the two ring-shaped parts are respectively connected by a plurality of stirring blades, and the ring-shaped part at the top is fixed to the other of the plurality of rotating connecting rods one end;

The second stirring blade is provided with a plurality of pieces, and is distributed in a circular array. One end of the plurality of stirring blades two is respectively fixed on the ring-shaped member at the bottom end, and the other end extends toward the direction of the heat exchange main pipe;

The motor fixing frame is arranged on the outside of the device housing and corresponds to the exit end of the rotating sleeve;

The rotating motor is fixed on the motor fixing frame, and its output shaft corresponds to the rotating sleeve;

The transmission gear set includes a driving gear and a driven gear, the driving gear is fixed on the output shaft of the rotating motor, the driven gear is sleeved and fixed on the outer wall of the rotating sleeve, and the driving gear engage.

Preferably, in one embodiment of the waste heat utilization device based on energy saving and emission reduction in thermal power plants, the main heat exchange pipe and the branch exchange pipes are connected to form a frame structure one, and the rotating connecting rod, the stirring assembly and the The two stirring blades are connected to form the second frame structure, and the first frame structure is located inside the second frame structure.

Preferably, in one embodiment of the waste heat utilization device based on energy saving and emission reduction in thermal power plants, the heat exchange adjustment component includes:

There are four temperature detection parts, which are respectively temperature detection part 1, temperature detection part 2, temperature detection part 3 and temperature detection part 4. The temperature detection part 1 is set in the input main pipeline and is used to measure the heat source medium The temperature when entering the heat exchange chamber; the temperature detection part 2 is set in the output main pipeline for measuring the temperature of the heat source medium after the heat exchange is completed; the temperature detection part 3 is set in the heat exchange medium input pipeline , used to measure the temperature of the heat exchange medium when it enters the heat exchange chamber; the temperature detection component 4 is arranged in the heat exchange medium output pipeline, and is used to measure the temperature of the heat exchange medium after heat exchange is completed;

There are four flow velocity detection components, which are respectively flow velocity detection component 1, flow velocity detection component 2, flow velocity detection component 3 and flow velocity detection component 4. The flow velocity detection component 1 is arranged on the heat exchange medium input pipeline for detecting The flow velocity of the heat exchange medium entering the heat exchange cavity; the flow velocity detection component 2 is arranged in the input main pipeline for detecting the flow velocity of the heat source medium entering the heat exchange cavity; the flow velocity detection Part three is arranged between the filter screen part and the separator, and is used to detect the flow rate of the heat source medium entering the filter cavity; the flow rate detection part four is arranged between the filter screen part and the suction part , for detecting the flow rate of the heat source medium passing through the filter element;

The controller is connected with the heat exchange medium supply equipment, the heat source medium supply equipment, the brush adjustment mechanism 1, the brush adjustment mechanism 2, the suction component, the rotating motor, the temperature detection component 1, and the temperature detection component 2 1. The temperature detection part 3, the temperature detection part 4, the flow speed detection part 1, the flow speed detection part 2 and the flow speed detection part 3 are electrically connected.

Preferably, in one embodiment of the above waste heat utilization device based on energy saving and emission reduction in thermal power plants, the controller can obtain the temperature data collected by the temperature detection part 1 and the temperature detection part 2 to obtain The temperature difference data before and after heating can be obtained according to the temperature data collected by the temperature detection part 3 and the temperature detection part 4, and the temperature difference data of the heat exchange medium before and after heat exchange can be obtained. Three and the flow velocity data collected by the flow velocity sensor four can obtain the flow velocity difference of the heat source medium before and after filtration, and according to the temperature difference data one, control the flow velocity of the heat source medium supplied by the heat source medium supply device, according to the The temperature difference data two controls the flow velocity of the heat exchange medium supplied by the heat exchange medium supply device, and judges the state of the filter screen according to the flow velocity difference, and controls the brush adjustment mechanism one when it is judged that the filter screen component is in a blocked state And the brush adjustment mechanism 2 drives the brush part to clean the filter screen part, and resets after the cleaning is completed.

Preferably, in one embodiment of the above waste heat utilization device based on energy saving and emission reduction in thermal power plants, when controlling the flow rate of the heat source medium supplied by the heat source medium supply device according to the range value of temperature difference data 1, the temperature difference is determined The range value H of the value data 1, the range value matrix H0 of the preset temperature difference data 1, set H0 (H1, H2, H3, H4), wherein, H1 is the range value of the first preset temperature difference data 1 , H2 is the range value of the second preset temperature difference data one, H3 is the range value of the third preset temperature difference data one, H4 is the range value of the fourth preset temperature difference data one, and H1<H2 <H3<H4;

Determine the flow rate range value D for the heat source medium, preset the flow rate matrix D0 for the heat source medium, and set D0 (D1, D2, D3, D4), where D1 is the first preset flow rate for the heat source medium, and D2 is the second Two preset flow velocity of the heat source medium, D3 is the third preset flow velocity of the heat source medium, D4 is the fourth preset flow velocity of the heat source medium, and D1<D2<D3<D4;

The flow rate of the heat source medium is set according to the relationship between the range value H of the temperature difference data 1 and the flow rate of the heat source medium supplied by the heat source medium supply device:

When H<H1, the first preset flow rate D1 of the heat source medium is selected as the flow rate of the heat source medium;

When H1≤H<H2, the second preset flow rate D2 of the heat source medium is selected as the flow rate of the heat source medium;

When H2≤H<H3, the third preset flow rate D3 of the heat source medium is selected as the flow rate of the heat source medium;

When H3≦H<H4, the fourth preset flow rate D4 of the heat source medium is selected as the flow rate of the heat source medium.

Preferably, in one embodiment of the waste heat utilization device based on energy saving and emission reduction in thermal power plants, when controlling the flow rate of the heat exchange medium supplied by the heat exchange medium supply device according to the range value of the temperature difference data 2, determine the The range value T of the temperature difference data two, the range value matrix T0 of the preset temperature difference data two, set T0 (T1, T2, T3, T4), wherein, T1 is the first preset temperature difference data two Range value, T2 is the range value of the second preset temperature difference data two, T3 is the range value of the third preset temperature difference data two, T4 is the range value of the fourth preset temperature difference data two, and T1 <T2<T3<T4;

Determine the flow velocity range value N supplied to the heat exchange medium, preset the flow velocity matrix N0 supplied to the heat exchange medium, and set N0 (N1, N2, N3, N4), where N1 is the first preset flow velocity supplied to the heat exchange medium, N2 is the second preset flow rate of the heat exchange medium, N3 is the third preset flow rate of the heat exchange medium, N4 is the fourth preset flow rate of the heat exchange medium, and N1<N2<N3<N4;

The flow rate of the heat exchange medium supplied by the heat exchange medium supply device is set according to the relationship between the range value T of the temperature difference data two and the flow rate of the heat exchange medium supplied by the heat exchange medium supply device:

When T<T1, the first preset flow rate N1 of the heat exchange medium is selected as the flow rate of the heat exchange medium;

When T1≤T<T2, select the second preset flow rate N2 of the heat exchange medium as the flow rate of the heat exchange medium;

When T2≤T<T3, select the third preset flow rate N3 of the heat exchange medium as the flow rate of the heat exchange medium;

When T3≦T<T4, the fourth preset flow rate N4 for supplying the heat exchange medium is selected as the flow rate for supplying the heat exchange medium.

It can be known from the above technical solutions that, compared with the prior art, the present invention has the beneficial effects of being able to collect data information of the heat exchange process, and realize automatic control of waste heat utilization according to the data information, which is conducive to improving the utilization rate of waste heat, and Filter the exhaust gas to reduce pollution, and the equipment is easy to maintain and the maintenance cost is low.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the perspective view provided by the embodiment of the present invention;

Fig. 2 is a perspective view of a heat exchange assembly and a mixing mechanism in an embodiment of the present invention;

Fig. 3 is the structural representation of filter assembly in the embodiment of the present invention;

Fig. 4 is a connection block diagram of the heat exchange adjustment assembly in the embodiment of the present invention.

In the picture:

1. Device shell; 20. Main input pipe; 21. Heat exchange component; 210. Main heat exchange pipe; 211. Branch exchange pipe; 22. Main output pipe; 30. Filter component; 31. Brush adjustment mechanism 1; 32. Brush adjustment mechanism two; 33. Brush component; 34. Suction component; 40. Rotating sleeve; 41. Rotating connecting rod; 42. Stirring component; 420. Ring component; 421. Stirring blade one; 43 , mixing blade two; 44, motor fixing frame; 45, rotating motor; 46, transmission gear set;

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

In the description of this application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the application.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

In order to better understand the purpose, structure and function of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings.

Referring to Figures 1-3, according to some embodiments of the present application, a waste heat utilization device based on energy saving and emission reduction in thermal power plants includes:

The device housing 1 is divided into a heat exchange chamber and a filter chamber in the middle by a partition. The heat exchange chamber is connected with a heat exchange medium input pipe and a heat exchange medium output pipe. The heat exchange medium input pipe is connected with the heat exchange medium supply equipment, and the heat exchange medium The output pipe is connected to the heat exchange chamber;

The heat exchange assembly, the heat exchange components are arranged in the heat exchange chamber, the heat source inlet is connected to the heat source medium supply equipment, and the heat source outlet is connected to the filter chamber, the heat exchange medium enters the heat exchange chamber for heat exchange and then flows out of the heat exchange chamber;

The filter assembly is arranged in the filter chamber, the heat source medium exchanges heat with the heat exchange medium in the heat exchange chamber, and is filtered by the filter assembly before being discharged from the device housing 1;

The heat exchange adjustment component is connected to the heat exchange component, the filter component and the heat source medium supply equipment, and is used for regulating the heat exchange process.

Through the above technical solution, the technical effects that can be achieved are:

In one embodiment of the invention, the heat exchange assembly includes:

Input main pipeline 20, one end of which is connected to the heat source medium output pipeline of the heat source medium supply equipment, and the other end penetrates into the heat exchange chamber;

The heat exchange component 21 has a channel structure inside and is arranged in the heat exchange chamber, and its input end is connected to the corresponding end of the input main pipeline 20 for transferring the heat source medium;

The output main pipe 22, its input end is connected with the output end of the heat exchange component 21, and its output end passes through the partition and enters the filter chamber.

Through the above technical solution, the technical effect that can be achieved is: the data information of the heat exchange process can be collected, and the automatic regulation of waste heat utilization can be realized according to the data information, which is conducive to improving the utilization rate of waste heat, and filtering the discharged gas to reduce pollution. , and the equipment is easy to maintain and the maintenance cost is low.

In one embodiment of the present invention, the heat exchange component 21 includes:

Heat exchange main pipe 210, its two ends are respectively connected with input main pipe 20 and output main pipe 22; The path communicates with the corresponding end of the heat exchange main pipe.

Preferably, in one embodiment of the waste heat utilization device based on energy saving and emission reduction in thermal power plants, the filter assembly includes:

The filter screen component 30, the filter screen component 30 is connected in the filter cavity, and the filter cavity is divided into two parts;

The brush adjustment mechanism 1 31 is a ball screw device, which is provided with an adjustment guide rail part and a movable mounting seat capable of moving along the guide rail. connected to the opposite side walls of the filter cavity;

The brush adjustment mechanism 2 32 is an electric push rod device, which is arranged on the lead screw nut of the ball screw device;

The brush part 33 is fixed on the telescopic end of the electric push rod;

The brush adjustment mechanism 2 32 can drive the brush part 33 to move axially along the filter chamber, so that it can fit/separate from the filter screen part 30; the brush adjustment mechanism 1 31 can drive the brush part 33 along the radial direction of the filter chamber. Move to make the brush part 33 move to the other end along one end of the filter screen part 30, and the filter screen part 30 is reciprocally brushed;

The suction part 34 is arranged at the opening end of the filter cavity, and is used to suck out the heat source medium after heat exchange from the filter cavity.

Specifically, the device housing 1 has a dust storage port at the position corresponding to the brush part 33, and a storage part is arranged on the outside, and the brush part 33 brushes dust and debris into the storage part, and the staff only need to regularly clean up the dust and garbage. That's it, very convenient.

Through the above-mentioned technical scheme, the technical effect that can be realized is: the automatic cleaning of the filter screen component 30 can be realized through the above-mentioned structure, and the brush is driven to move when cleaning, and the rest of the time is not in contact with the filter screen component 30, so as to avoid the long-term contact between the brush and the filter screen. Contact causes strainer deformation and reduces service life.

In one embodiment of the present invention, it also includes a mixing mechanism, including:

The rotating sleeve 40 is sleeved on the outside of the input main pipeline 20, one end of which passes through the device housing 1, and the other end extends into the heat exchange chamber, and its inner wall and outer wall are respectively connected to the inner wall of the input main pipeline 20 and the device housing. The corresponding part of 1 forms a dynamic sealing structure and is rotatably connected with it;

The rotating connecting rods 41 are provided with a plurality of them and are all arranged in the heat exchange chamber, and are distributed in a circular array on the outside of the rotating sleeve 40, and one end of each rotating connecting rod 41 is fixedly connected to the outer wall of the corresponding end of the rotating sleeve 40 ;

The stirring assembly 42 includes two ring-shaped parts 420 arranged in parallel, and the two ring-shaped parts 420 are respectively connected by a plurality of stirring blades 421. one end;

The second stirring blade 43 is provided with multiple pieces, and is distributed in a circular array. One end of the second stirring blade 43 is respectively fixed on the ring-shaped part 420 at the bottom, and the other end extends toward the heat exchange main pipe 210;

The motor fixing frame 44 is arranged on the outside of the device housing 1 and corresponds to the exit end of the rotating sleeve 40;

The rotating motor 45 is fixed on the motor holder 44, and its output shaft corresponds to the rotating sleeve 40;

The transmission gear set 46 includes a driving gear and a driven gear. The driving gear is fixed on the output shaft of the rotating motor 45, and the driven gear is sleeved and fixed on the outer wall of the rotating sleeve 40 to mesh with the driving gear.

Through the above technical solution, the technical effect that can be achieved is: the above solution can stir the heat exchange medium in the heat exchange chamber, make the heat exchange medium in the heat exchange chamber mix with each other, reduce the temperature difference, and improve the heat exchange efficiency.

In one embodiment of the present invention, the main heat exchange pipe 210 and the branch exchange pipe 211 are connected to form a frame structure 1, and the rotating connecting rod 41, the stirring assembly 42 and the stirring blade 2 43 are connected to form a frame structure 2, and the frame structure 1 is in the frame The inner side of structure two.

Through the above technical solution, the technical effect that can be achieved is: in this solution, the heat exchange process and the stirring and mixing process are carried out synchronously without mutual interference, which is conducive to improving the heat exchange efficiency.

Referring to Figure 4, in one embodiment of the present invention, the heat exchange adjustment assembly includes:

The temperature detection part, preferably a temperature sensor, is provided with four, respectively a temperature detection part one, a temperature detection part two, a temperature detection part three and a temperature detection part four, and the temperature detection part one is arranged in the main input pipeline 20 for Measure the temperature of the heat source medium when it enters the heat exchange chamber; the temperature detection part 2 is set in the output main pipeline 22 for measuring the temperature of the heat source medium after heat exchange; the temperature detection part 3 is set in the heat exchange medium input pipeline for Measure the temperature of the heat exchange medium when it enters the heat exchange chamber; the temperature detection part 4 is set in the output pipe of the heat exchange medium, and is used to measure the temperature of the heat exchange medium after the heat exchange is completed;

The flow velocity detection component, preferably a flow velocity sensor, is provided with four flow velocity detection components, flow velocity detection component 1, flow velocity detection component 2, flow velocity detection component 3, and flow velocity detection component 4. Detect the flow velocity of the heat exchange medium entering the heat exchange chamber; the flow velocity detection part 2 is arranged in the input main pipeline 20, and is used to detect the flow velocity of the heat source medium entering the heat exchange chamber; the flow velocity detection part 3 is arranged between the filter screen part 30 and the separator between, used to detect the flow rate of the heat source medium entering the filter cavity; the flow rate detection component 4 is arranged between the filter screen component 30 and the suction component 34, and is used to detect the flow rate of the heat source medium passing through the filter screen component 30;

The controller is a programmable controller, which is connected with heat exchange medium supply equipment, heat source medium supply equipment, brush adjustment mechanism 1 31, brush adjustment mechanism 2 32, suction component 34, rotating motor 45, and temperature detection component 1. 1. The temperature detection part two, the temperature detection part three, the temperature detection part four, the flow speed detection part one, the flow speed detection part two and the flow speed detection part three are electrically connected.

Through the above technical solution, the technical effect that can be achieved is: the control of the heat exchange process is performed through data, with higher accuracy, higher heat exchange efficiency, and avoiding waste of heat.

In one embodiment of the present invention, the controller can obtain the temperature difference data of the heat source medium before and after heat exchange according to the temperature data collected by the temperature detection part 1 and the temperature detection part 2, and according to the temperature detection part 3 and the temperature detection part The temperature data collected by four can obtain the temperature difference data of the heat exchange medium before and after heat exchange. Second, according to the flow velocity data collected by flow velocity sensor three and flow velocity sensor four, the flow velocity difference of the heat source medium before and after filtration can be obtained, and according to Temperature difference data 1, control the flow rate of heat source medium supplied by the heat source medium supply equipment, control the flow rate of heat exchange medium supply equipment for heat exchange medium according to temperature difference data 2, and judge the state of the filter screen according to the flow rate difference, when judging the filter screen When the component 30 is in a blocked state, the first brush adjustment mechanism 31 and the second brush adjustment mechanism 32 are controlled to drive the brush component 33 to clean the filter screen component 30, and reset after cleaning.

Through the above technical solution, the technical effect that can be achieved is: when controlling the flow rate of the heat source medium supplied by the heat source medium supply device according to the value of the temperature difference data 1, if the temperature difference is too large, it means that the temperature of the heat source medium is basically absorbed by the heat exchange medium, There is a problem that the heat exchange medium cannot reach the upper limit of the preset temperature. By increasing the flow rate of the heat source medium, the heat exchange frequency between the heat source medium and the heat exchange medium can be increased to provide more heat for the heat exchange medium. On the contrary, a large amount of heat source medium The heat energy has not been fully utilized, and the flow rate needs to be reduced to increase the utilization rate of heat; according to the value of the temperature difference data 2, when controlling the flow rate of the heat exchange medium supply equipment to supply the heat exchange medium, if the temperature difference is too large, it means that the heat exchange medium has absorbed More heat, there is a problem that the temperature of the heat exchange medium is too high. By increasing the flow rate of the heat exchange medium, the heat exchange frequency between the heat source medium and the heat exchange medium can be increased, and the temperature range of the heat exchange medium can be controlled. On the contrary, the heat exchange medium does not Sufficient heat energy is absorbed from the heat source medium, resulting in insufficient utilization of heat energy. It is necessary to reduce the flow rate and improve the utilization rate of heat; according to the difference in flow rate, when judging the state of the filter, if the difference in flow rate is large, it means that the flow rate through the filter If the flow rate of the heat source medium is too slow, there is a clogging problem in the filter screen component 30, which needs to be cleaned; otherwise, no cleaning is required.

Specifically, when controlling the flow rate of the heat source medium supplied by the heat source medium supply device according to the range value of the temperature difference data 1, the range value H of the temperature difference data 1 is determined, and the range value matrix H0 of the temperature difference data 1 is preset. Set H0(H1, H2, H3, H4), wherein, H1 is the range value of the first preset temperature difference data one, H2 is the range value of the second preset temperature difference data one, and H3 is the third preset The range value of temperature difference data 1, H4 is the range value of the fourth preset temperature difference data 1, and H1<H2<H3<H4;

Determine the flow rate range value D for the heat source medium, preset the flow rate matrix D0 for the heat source medium, and set D0 (D1, D2, D3, D4), where D1 is the first preset flow rate for the heat source medium, and D2 is the second Two preset flow velocity of the heat source medium, D3 is the third preset flow velocity of the heat source medium, D4 is the fourth preset flow velocity of the heat source medium, and D1<D2<D3<D4;

According to the relationship between the range value H of the temperature difference data 1 and the flow rate of the heat source medium supplied by the heat source medium supply equipment, the flow rate of the heat source medium is set:

When H<H1, the first preset flow rate D1 of the heat source medium is selected as the flow rate of the heat source medium;

When H1≤H<H2, select the second preset flow rate D2 of the heat source medium as the flow rate of the heat source medium;

When H2≦H<H3, the third preset flow rate D3 of the heat source medium is selected as the flow rate of the heat source medium;

When H3≦H<H4, the fourth preset flow rate D4 for supplying the heat source medium is selected as the flow rate for supplying the heat source medium.

Specifically, when controlling the flow rate of the heat exchange medium supplied by the heat exchange medium supply device according to the range value of the temperature difference data 2, the range value T of the temperature difference data 2 is determined, and the range value matrix T0 of the temperature difference data 2 is preset. , set T0(T1, T2, T3, T4), wherein, T1 is the range value of the first preset temperature difference data two, T2 is the range value of the second preset temperature difference data two, and T3 is the third The range value of the preset temperature difference data 2, T4 is the range value of the fourth preset temperature difference data 2, and T1<T2<T3<T4;

Determine the flow velocity range value N supplied to the heat exchange medium, preset the flow velocity matrix N0 supplied to the heat exchange medium, and set N0 (N1, N2, N3, N4), where N1 is the first preset flow velocity supplied to the heat exchange medium, N2 is the second preset flow rate of the heat exchange medium, N3 is the third preset flow rate of the heat exchange medium, N4 is the fourth preset flow rate of the heat exchange medium, and N1<N2<N3<N4;

According to the relationship between the range value T of the temperature difference data 2 and the flow rate of the heat exchange medium supplied by the heat exchange medium supply device, the flow rate of the heat exchange medium is set:

When T<T1, select the first preset flow rate N1 for supplying the heat exchange medium as the flow rate for supplying the heat exchange medium;

When T1≤T<T2, select the second preset flow rate N2 for supplying the heat exchange medium as the flow rate for supplying the heat exchange medium;

When T2≤T<T3, select the third preset flow rate N3 for supplying the heat exchange medium as the flow rate for supplying the heat exchange medium;

When T3≦T<T4, the fourth preset flow rate N4 for supplying the heat exchange medium is selected as the flow rate for supplying the heat exchange medium.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the related information, please refer to the description of the method part.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a waste heat utilization equipment based on thermal power plant energy saving and emission reduction which characterized in that includes:

the device comprises a device shell, a heat exchange cavity and a filter cavity, wherein the middle part of the device shell is divided into the heat exchange cavity and the filter cavity by a partition plate, the heat exchange cavity is communicated with a heat exchange medium input pipeline and a heat exchange medium output pipeline, the heat exchange medium input pipeline is communicated with heat exchange medium supply equipment, and the heat exchange medium output pipeline is communicated with the heat exchange cavity;

the heat exchange component of the heat exchange assembly is arranged in the heat exchange cavity, a heat source inlet of the heat exchange assembly is connected with heat source medium supply equipment, a heat source outlet of the heat exchange assembly is communicated with the filter cavity, and heat exchange media enter the heat exchange cavity for heat exchange and then flow out of the heat exchange cavity;

the filtering assembly is arranged in the filtering cavity, a heat source medium exchanges heat with the heat exchange medium in the heat exchange cavity, and the heat source medium is filtered by the filtering assembly and then is discharged out of the device shell;

and the heat exchange adjusting assembly is connected with the heat exchange assembly, the filtering assembly and the heat source medium supply equipment and is used for regulating and controlling the heat exchange process.

2. The waste heat utilization device based on energy conservation and emission reduction of the thermal power plant as claimed in claim 1, wherein the heat exchange assembly comprises:

one end of the input main pipeline is connected with a heat source medium output pipeline of the heat source medium supply equipment, and the other end of the input main pipeline penetrates into the heat exchange cavity;

the heat exchange component is internally provided with a channel structure, is arranged in the heat exchange cavity, and has an input end connected with the corresponding end of the input main pipeline and used for transmitting a heat source medium;

and the input end of the output main pipeline is connected with the output end of the heat exchange component, and the output end of the output main pipeline penetrates through the partition plate to enter the filtering cavity.

3. The waste heat utilization device based on energy conservation and emission reduction of the thermal power plant as claimed in claim 2, wherein the heat exchange component comprises:

the two ends of the heat exchange main pipe are respectively connected with the input main pipe and the output main pipe;

and the branch exchange tubes are provided with a plurality of branch exchange tubes which are distributed outside the heat exchange main pipe in a circumferential array shape, and two ends of the branch exchange tubes are respectively communicated with the corresponding ends of the heat exchange main pipe through pipelines.

4. The waste heat utilization device based on energy conservation and emission reduction of the thermal power plant as claimed in claim 3, wherein the filter assembly comprises:

the filter screen component is connected in the filter cavity and divides the filter cavity into two parts;

the first brush adjusting mechanism is provided with an adjusting guide rail component and a movable mounting seat capable of moving along the guide rail, the adjusting guide rail is arranged between the partition plate and the filter screen component, and two ends of the adjusting guide rail are respectively connected to opposite side walls of the filter cavity;

the second brush adjusting mechanism is arranged on the movable mounting seat of the first brush adjusting mechanism;

the brush component is fixed on the moving component of the second brush adjusting mechanism;

the second brush adjusting mechanism can drive the brush part to axially move along the filter cavity so as to be attached to or separated from the filter screen part; the first brush adjusting mechanism can drive the brush component to move along the radial direction of the filter cavity, so that the brush component moves towards the other end along one end of the filter screen component and brushes the filter screen component in a reciprocating manner;

and the suction part is arranged at the opening end of the filter cavity and is used for sucking the heat source medium after heat exchange out of the filter cavity.

5. The waste heat utilization device based on energy conservation and emission reduction of the thermal power plant according to claim 4, further comprising a blending mechanism, comprising:

the rotary sleeve is sleeved outside the input main pipeline, one end of the rotary sleeve penetrates out along the device shell, the other end of the rotary sleeve extends into the heat exchange cavity, and the inner wall and the outer wall of the rotary sleeve respectively form a dynamic sealing structure with the corresponding positions of the inner wall of the input main pipeline and the device shell and are in rotary connection with the dynamic sealing structure;

the rotating connecting rods are provided with a plurality of rotating connecting rods, are arranged in the heat exchange cavities and are distributed on the outer side of the rotating sleeve in a circumferential array manner, and one end of each rotating connecting rod is fixedly connected with the outer wall of the corresponding end of the rotating sleeve;

the stirring assembly comprises two annular parts which are arranged in parallel, the two annular parts are connected through a plurality of stirring blades I respectively, and the annular part at the top is fixed at the other ends of the plurality of rotating connecting rods;

a plurality of stirring blades II which are distributed in a circumferential array shape, one end of each stirring blade II is fixed on the annular part at the bottom end, and the other end of each stirring blade II extends towards the direction of the heat exchange main pipe;

the motor fixing frame is arranged on the outer side of the device shell and corresponds to the penetrating end of the rotating sleeve;

the rotating motor is fixed on the motor fixing frame, and an output shaft of the rotating motor corresponds to the rotating sleeve;

and the transmission gear set comprises a driving gear and a driven gear, the driving gear is fixed on an output shaft of the rotating motor, and the driven gear is sleeved and fixed on the outer wall of the rotating sleeve and meshed with the driving gear.

6. The waste heat utilization device based on energy conservation and emission reduction of a thermal power plant as claimed in claim 5, wherein the heat exchange main pipe and the branch exchange pipes are connected to form a first frame structure, the rotating connecting rod, the stirring assembly and the second stirring blade are connected to form a second frame structure, and the first frame structure is located on the inner side of the second frame structure.

7. The waste heat utilization device based on energy conservation and emission reduction of the thermal power plant as claimed in claim 6, wherein the heat exchange regulation component comprises:

the four temperature detection components are respectively a first temperature detection component, a second temperature detection component, a third temperature detection component and a fourth temperature detection component, and the first temperature detection component is arranged in the input main pipeline and used for measuring the temperature of a heat source medium when the heat source medium enters the heat exchange cavity; the second temperature detection part is arranged in the output main pipeline and is used for measuring the temperature of the heat source medium after heat exchange is finished; the temperature detection component III is arranged in the heat exchange medium input pipeline and is used for measuring the temperature of the heat exchange medium entering the heat exchange cavity; the temperature detection component IV is arranged in the heat exchange medium output pipeline and is used for measuring the temperature of the heat exchange medium after heat exchange is completed;

the four flow velocity detection components are respectively a first flow velocity detection component, a second flow velocity detection component, a third flow velocity detection component and a fourth flow velocity detection component, and the first flow velocity detection component is arranged on the heat exchange medium input pipeline and used for detecting the flow velocity of the heat exchange medium entering the heat exchange cavity; the second flow velocity detection component is arranged in the input main pipeline and used for detecting the flow velocity of the heat source medium entering the heat exchange cavity; the third flow velocity detection part is arranged between the filter screen part and the partition plate and is used for detecting the flow velocity of the heat source medium entering the filter cavity; the flow speed detection part IV is arranged between the filter screen part and the suction part and is used for detecting the flow speed of the heat source medium passing through the filter screen part;

and the controller is respectively and electrically connected with the heat exchange medium supply device, the heat source medium supply device, the first hairbrush adjusting mechanism, the second hairbrush adjusting mechanism, the suction part, the rotating motor, the first temperature detecting part, the second temperature detecting part, the third temperature detecting part, the fourth temperature detecting part, the first flow velocity detecting part, the second flow velocity detecting part and the third flow velocity detecting part.

8. The waste heat utilization device based on energy conservation and emission reduction of the thermal power plant as claimed in claim 7, wherein the controller is capable of obtaining a first temperature difference value of a heat source medium before and after heat exchange according to the first temperature data collected by the first temperature detection component and the second temperature detection component, obtaining a second temperature difference value of the heat source medium before and after heat exchange according to the third temperature detection component and the fourth temperature data collected by the fourth temperature detection component, obtaining a flow rate difference value of the heat source medium before and after filtration according to the third flow rate data and the fourth flow rate data, controlling a flow rate of the heat source medium supplied by the heat source medium supply equipment according to the first temperature difference value, controlling a flow rate of the heat source medium supplied by the heat source medium supply equipment according to the second temperature difference value, judging a filter screen state according to the flow rate difference value, and controlling the first brush adjustment mechanism and the second brush adjustment mechanism to drive the brush component to clean the filter screen component when the filter screen component is judged to be in a blocked state, and resetting after the cleaning is completed.

9. The waste heat utilization device based on energy conservation and emission reduction of the thermal power plant as claimed in claim 8, wherein when the flow rate of the heat source medium supplied by the heat source medium supply equipment is controlled according to the range value of the first temperature difference data, the range value H of the first temperature difference data is determined, the range value matrix H0 of the first preset temperature difference data is set to be H0 (H1, H2, H3, H4), wherein H1 is the range value of the first preset temperature difference data, H2 is the range value of the first preset temperature difference data, H3 is the range value of the third preset temperature difference data, H4 is the range value of the first preset temperature difference data, and H1 < H2 < H3 < H4;

determining a flow velocity range value D of a supplied heat source medium, presetting a flow velocity matrix D0 of the supplied heat source medium, and setting D0 (D1, D2, D3, D4), wherein D1 is the flow velocity of a first preset supplied heat source medium, D2 is the flow velocity of a second preset supplied heat source medium, D3 is the flow velocity of a third preset supplied heat source medium, D4 is the flow velocity of a fourth preset supplied heat source medium, and D1 is more than D2 and less than D3 and less than D4;

setting the flow rate of the heat source medium supplied by the heat source medium supply device according to the relation between the range value H of the temperature difference data I and the flow rate of the heat source medium supplied by the heat source medium supply device:

when H is less than H1, selecting the flow speed D1 of the first preset heat source supply medium as the flow speed of the heat source supply medium;

when H1 is not less than H and less than H2, selecting the flow speed D2 of the second preset heat source supply medium as the flow speed of the heat source supply medium;

when H2 is more than or equal to H and less than H3, selecting the flow speed D3 of the third preset heat source supply medium as the flow speed of the heat source supply medium;

and when H3 is not more than H and less than H4, selecting the flow speed D4 of the fourth preset heat source supply medium as the flow speed of the heat source supply medium.

10. The waste heat utilization device based on energy conservation and emission reduction of the thermal power plant as claimed in claim 8, wherein when the flow rate of the heat exchange medium supplied by the heat exchange medium supply equipment is controlled according to the range value of the temperature difference data two, the range value T of the temperature difference data two is determined, the range value matrix T0 of the preset temperature difference data two is set to T0 (T1, T2, T3, T4), wherein T1 is the range value of the first preset temperature difference data two, T2 is the range value of the second preset temperature difference data two, T3 is the range value of the third preset temperature difference data two, T4 is the range value of the fourth preset temperature difference data two, and T1 < T2 < T3 < T4;

determining a flow rate range value N of a supplied heat exchange medium, presetting a flow rate matrix N0 of the supplied heat exchange medium, and setting N0 (N1, N2, N3, N4), wherein N1 is the flow rate of a first preset supplied heat exchange medium, N2 is the flow rate of a second preset supplied heat exchange medium, N3 is the flow rate of a third preset supplied heat exchange medium, N4 is the flow rate of a fourth preset supplied heat exchange medium, and N1 is more than N2 and more than N3 and more than N4;

setting the flow rate of the supplied heat exchange medium according to the relationship between the range value T of the temperature difference data two and the flow rate of the heat exchange medium supplied by the heat exchange medium supply device:

when T is less than T1, selecting the flow rate N1 of the first preset supply heat exchange medium as the flow rate of the supply heat exchange medium;

when T1 is more than or equal to T and less than T2, selecting the flow rate N2 of the second preset heat exchange medium as the flow rate of the heat exchange medium;

when T2 is more than or equal to T and less than T3, selecting the flow rate N3 of the third preset heat exchange medium as the flow rate of the heat exchange medium;

and when T3 is larger than or equal to T and smaller than T4, selecting the fourth preset flow speed N4 of the supplied heat exchange medium as the flow speed of the supplied heat exchange medium.

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