CN219283380U - A thermal power plant waste heat recovery and utilization system - Google Patents

Abstract

The utility model disclosed belongs to the technical field of waste heat recovery, and is specifically a waste heat recovery and utilization system of a thermal power plant, comprising: a smoke exhaust pipe for transporting high-temperature flue gas produced by a thermal power plant, and a dust collector for treating high-temperature smoke Gas dedusting, desulfurization tower, used for desulfurization of high-temperature flue gas, heat exchange mechanism, using high-temperature flue gas to preheat the fuel to be used, one end of the exhaust pipe is connected to the inlet end of the dust collector , the gas outlet end of the dust collector is connected with the inlet end of the desulfurization tower through the first pipeline, and the utility model has the function of realizing the preheating of the fuel to be used by using the high-temperature flue gas by setting the heat exchange mechanism. Using high-temperature flue gas to preheat the fuel to be used not only realizes resource utilization, but also avoids heat loss and saves costs. At the same time, preheating the fuel to be used can also shorten the combustion of the fuel to be used time.

Description

A thermal power plant waste heat recovery and utilization system

technical field

The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery and utilization system of a thermal power plant.

Background technique

A thermal power plant is a factory that uses combustibles (such as coal) as fuel to produce electricity. Its basic production process is: when the fuel is burned, water is heated to generate steam, and the chemical energy of the fuel is converted into heat energy. The steam pressure drives the steam turbine to rotate, and the heat energy conversion Then the steam turbine drives the generator to rotate to convert the mechanical energy into electrical energy, and the fuel will produce a large amount of high-temperature smoke during the combustion process. However, most existing enterprises generally discharge high-temperature flue gas into the air after a certain degree of purification and cooling, resulting in a large loss of heat energy, which in turn leads to a reduction in boiler efficiency. Therefore, a thermal power plant waste heat recovery and utilization system is invented.

Utility model content

In view of the problems mentioned above and/or in the existing waste heat recovery and utilization system of a thermal power plant, the utility model is proposed.

Therefore, the purpose of this utility model is to provide a thermal power plant waste heat recovery and utilization system, which can solve the above-mentioned existing problems.

In order to solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical solutions:

A thermal power plant waste heat recovery and utilization system, which includes:

The exhaust pipe is used to convey the high-temperature flue gas generated by the thermal power plant;

Dust collector, used to remove dust from high temperature flue gas;

Desulfurization tower, used for desulfurization of high-temperature flue gas;

The heat exchange mechanism uses high-temperature flue gas to preheat the fuel to be used;

One end of the exhaust pipe is connected to the inlet end of the dust collector, the gas outlet end of the dust collector is connected to the inlet end of the desulfurization tower through a first pipeline, and the gas outlet end of the desulfurization tower is fixed The second pipeline is connected, and one end of the second pipeline is fixedly connected to two sets of third pipelines with electromagnetic valves on them through a three-way joint, and one end of each set of third pipelines is connected to a set of heat exchange mechanisms.

As a preferred solution of a thermal power plant waste heat recovery and utilization system described in the present invention, the heat exchange mechanism includes:

bracket;

The air intake assembly is used to transport high-temperature flue gas, and the air intake assembly is installed on the bracket;

A heating component that preheats the fuel by using the high-temperature flue gas delivered by the intake component, and the heating component is installed on the bracket;

A conveying assembly for conveying the preheated flue gas, and the conveying assembly is installed on the bracket;

The driving assembly is used to rotate the heating assembly by using the flue gas conveyed by the conveying assembly, and the driving assembly is installed on the bracket.

As a preferred solution of a thermal power plant waste heat recovery and utilization system described in the present utility model, wherein: the support includes:

floor;

The side plate is fixedly installed on the top side of the bottom plate.

As a preferred solution of a thermal power plant waste heat recovery and utilization system described in the present utility model, wherein: the air intake assembly includes:

a block, the block is fixedly installed on the top of the bottom plate, and a third pipe is fixedly installed on the inner wall of one end of the block;

A circulation groove, the inner wall of the box is provided with a circulation groove;

Hard pipe, several hard pipes are fixedly installed on the inner wall of the top of the box.

As a preferred solution of a thermal power plant waste heat recovery and utilization system described in the present invention, wherein: the heating assembly includes:

An outer cylinder, a plurality of hard pipes are fixedly installed on the inner wall of the bottom end of the outer cylinder, and an air intake pipe is fixedly installed on the inner wall of the top end of the outer cylinder;

Support plates, the inner walls of both ends of the outer cylinder are fixedly installed with support plates;

Its material is brass inner cylinder, the inner wall of the support plate is connected to the inner cylinder by bearing rotation, and the inner wall of one end of the inner cylinder is fixedly installed with the connecting plate, and the inner wall of the other end of the inner cylinder is detachably connected to the cylinder cover;

The rotating shaft is rotatably connected to the side plate through a bearing, and one end of the rotating shaft is fixedly installed with a connecting plate.

As a preferred solution of a thermal power plant waste heat recovery and utilization system described in the utility model, wherein: the conveying assembly includes:

a fixed plate, the fixed plate is fixedly installed on the top side of the side plate;

an air pump, the air pump is fixedly installed on the top of the fixed plate;

An intake pipe, the input end of the air pump is fixedly installed with an intake pipe;

The air outlet pipe is fixedly installed at the output end of the air pump.

As a preferred solution of a thermal power plant waste heat recovery and utilization system described in the utility model, wherein: the drive assembly includes:

A sealing box, the sealing box is fixedly installed on one side of the side plate, and the top inner wall of the sealing box is fixedly installed with an air outlet pipe;

A rotating block located in the inner cavity of the sealed box, the inner wall of the rotating block is fixedly installed with a rotating shaft;

A rotating plate, a number of rotating plates are fixedly installed on the outer surface of the rotating block, and a group of rotating plates are located directly below the air outlet pipe;

An air outlet, the air outlet is provided on the bottom inner wall of the sealed box.

As a preferred solution of a thermal power plant waste heat recovery and utilization system described in the utility model, wherein: the cylinder cover is:

A support block, a plurality of support blocks are fixedly installed on the inner wall at one end of the inner cylinder;

The sealing plate is detachably connected to the supporting block through screws.

As a preferred solution of a thermal power plant waste heat recovery and utilization system described in the utility model, wherein: the cylinder cover is:

A connecting column, the connecting column is inserted on the inner wall of one end of the inner cylinder, and a sealing ring is provided between the connecting column and the inner cylinder;

A baffle, one end of the connecting column is fixedly installed with a baffle;

a driving block, and the driving block is fixedly installed on the baffle.

Compared with existing technology:

1. By setting the heat exchange mechanism, it has the function of using high-temperature flue gas to preheat the fuel to be used. By using high-temperature flue gas to preheat the fuel to be used, not only the utilization of resources is realized, but also the loss of heat is avoided. The cost is saved, and at the same time, the combustion time of the fuel to be used is shortened by preheating the fuel to be used;

2. By rotating the heating assembly, it has the effect of making the fuel tumble in the inner cylinder, and by making the fuel tumble in the inner cylinder, it has the effect of evenly heating the fuel, thereby improving the preheating effect of the fuel;

3. By setting the driving component, it has the function of using the flowing flue gas to make the heating component rotate, and by using the flowing flue gas to rotate the heating component, it has the investment of reducing costs;

4. By setting the conveying component, it can avoid the preheated flue gas from staying between the outer cylinder and the inner cylinder, and avoid the high temperature flue gas from staying between the outer cylinder and the inner cylinder. The heat is absorbed by the preheated flue gas, resulting in heat loss;

5. By arranging two sets of heat exchange mechanisms, it has the function of making the two sets of heat exchange mechanisms work alternately, and by making the two sets of heat exchange mechanisms work alternately, it can avoid the phenomenon of suspending the transmission of high-temperature flue gas.

Description of drawings

Fig. 1 is the schematic diagram of front view of the overall structure of the utility model;

Fig. 2 is a schematic front view of the heat exchange mechanism of Embodiment 1 of the present utility model;

Fig. 3 is the enlarged schematic diagram of the structure at A in Fig. 2 of the present utility model;

Fig. 4 is a schematic side view of the local structure of the heating assembly of the utility model;

Fig. 5 is a schematic side view of the drive assembly of the present invention;

Fig. 6 is a schematic front view of the heat exchange mechanism of Embodiment 2 of the present utility model.

In the figure: smoke exhaust pipe 10, dust collector 20, first pipeline 30, desulfurization tower 40, second pipeline 50, third pipeline 60, heat exchange mechanism 70, bracket 71, bottom plate 711, side plate 712, intake assembly 72 , block 721, circulation groove 722, hard pipe 723, heating assembly 73, outer cylinder 731, support plate 732, inner cylinder 733, rotating shaft 734, cylinder cover 74, sealing plate 741, support block 742, connecting column 746, baffle 747 , driving block 748, conveying assembly 75, fixed plate 751, air pump 752, air inlet pipe 753, air outlet pipe 754, driving assembly 76, sealing box 761, rotating block 762, rotating plate 763, air outlet 764.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the implementation of the utility model will be further described in detail below in conjunction with the accompanying drawings.

Example 1:

The utility model provides a thermal power plant waste heat recovery and utilization system, please refer to Fig. 1-Fig. Flue gas dedusting, desulfurization tower 40, used for desulfurizing high-temperature flue gas, heat exchange mechanism 70, using high-temperature flue gas to preheat the fuel to be used;

One end of the exhaust pipe 10 is connected to the intake end of the dust collector 20, the gas outlet end of the dust collector 20 is connected to the gas inlet end of the desulfurization tower 40 through the first pipeline 30, and the gas outlet end of the desulfurization tower 40 is fixedly connected to the second pipeline 50, and one end of the second pipeline 50 is fixedly connected to two groups of third pipelines 60 provided with electromagnetic valves through a three-way joint, and one end of each group of third pipelines 60 is connected to a group of heat exchange mechanisms 70;

Working principle: the high-temperature flue gas produced by the thermal power plant flows into the dust collector 20 through the exhaust pipe 10 for dust removal, and the high-temperature flue gas after dust removal flows into the desulfurization tower 40 through the first pipeline 30 for desulfurization. At this time, Only one set of solenoid valves is activated, so that the desulfurized high-temperature flue gas flows into the corresponding heat exchange mechanism 70 through the corresponding third pipeline 60 .

The heat exchange mechanism 70 includes: a bracket 71, an air intake assembly 72 for transporting high-temperature flue gas, a heating assembly 73 for preheating fuel by using the high-temperature flue gas transported by the air intake assembly 72, and a heating assembly 73 for preheating the preheated flue gas. The conveying assembly 75 for conveying the gas, and the driving assembly 76 for rotating the heating assembly 73 by utilizing the flue gas conveyed by the conveying assembly 75;

And the air intake assembly 72 is installed on the bracket 71 , and the heating assembly 73 is installed on the bracket 71 , and the delivery assembly 75 is installed on the bracket 71 , and the driving assembly 76 is installed on the bracket 71 .

The bracket 71 includes: a bottom plate 711 and a side plate 712 ; the side plate 712 is fixedly installed on the top side of the bottom plate 711 .

The intake assembly 72 includes: a block 721, a flow groove 722, and a hard pipe 723;

The block 721 is fixedly installed on the top of the base plate 711, and the third pipeline 60 is fixedly installed on the inner wall of one end of the block 721, and the inner wall of the block 721 is provided with a circulation groove 722, and some hard pipes 723 are fixedly installed on the inner wall of the top of the block 721;

Working principle: when the high-temperature flue gas after desulfurization flows into the third pipe 60 , it will flow into the space between the outer cylinder 731 and the inner cylinder 733 through the flow groove 722 and the hard pipe 723 .

The heating assembly 73 includes: an outer cylinder 731, a support plate 732, an inner cylinder 733 made of brass, and a rotating shaft 734;

A plurality of hard tubes 723 are fixedly installed on the inner wall of the bottom end of the outer cylinder 731, and an air intake pipe 753 is fixedly installed on the inner wall of the top end of the outer cylinder 731, and support plates 732 are fixedly installed on the inner walls of both ends of the outer cylinder 731, and the inner walls of the support plates 732 are connected through bearing rotation Inner cylinder 733, and one end inner wall of inner cylinder 733 is fixedly installed with connecting plate, the other end inner wall of inner cylinder 733 is detachably connected with cylinder cover 74, rotating shaft 734 is connected on the side plate 712 through bearing rotation, and one end of rotating shaft 734 is fixedly installed and connected plate;

Working principle: when the high-temperature flue gas flows into the space between the outer cylinder 731 and the inner cylinder 733 , heat will be transferred to the inner cylinder 733 to preheat the fuel in the inner cylinder 733 .

The conveying assembly 75 includes: a fixed plate 751, an air pump 752, an air inlet pipe 753, and an air outlet pipe 754;

The fixed plate 751 is fixedly installed on the top side of the side plate 712, the air pump 752 is fixedly installed on the top of the fixed plate 751, the input end of the air pump 752 is fixedly installed with the air inlet pipe 753, and the output end of the air pump 752 is fixedly installed with the air outlet pipe 754;

Working principle: when the fuel in the inner cylinder 733 is preheated, the air pump 752 is started. After starting, the preheated flue gas will flow into the sealed box 761 through the inlet pipe 753 and the outlet pipe 754 .

The drive assembly 76 includes: a sealed box 761, a rotating block 762 located in the inner cavity of the sealed box 761, a rotating plate 763, and an air outlet 764;

The sealing box 761 is fixedly installed on one side of the side plate 712, and the top inner wall of the sealing box 761 is fixedly installed with the outlet pipe 754, the inner wall of the rotating block 762 is fixedly installed with the rotating shaft 734, and the outer surface of the rotating block 762 is fixedly installed with several rotating plates 763, And a set of rotating plates 763 is located directly below the air outlet pipe 754, and the air outlet hole 764 is opened on the bottom inner wall of the sealed box 761;

Working principle: when the preheated flue gas flows into the sealed box 761, it will impact a group of rotating plates 763, and the impacted rotating plates 763 will rotate, so that the rotating block 762 drives the rotating shaft 734 to rotate , when the rotating shaft 734 rotates, the inner cylinder 733 will be rotated, so that the material in the inner cylinder 733 will be rolled, so that the fuel will be heated evenly, wherein, when the smoke flows into the sealed box 761, the smoke will be It flows out through the air outlet hole 764.

The cylinder cover 74 is: a support block 742, a sealing plate 741;

A number of supporting blocks 742 are fixedly installed on the inner wall of one end of the inner cylinder 733, and the sealing plate 741 is detachably connected to the supporting blocks 742 by screws;

Working principle: After preheating the fuel in one group of inner tubes 733, close one group of solenoid valves and start another group of solenoid valves, so that high-temperature smoke flows into another group of heat exchange mechanisms 70. At this time, Remove the screws and take away the sealing plate 741. Afterwards, take out the preheated fuel from the inner cylinder 733 and transport it to the thermal power plant for use. After taking out the preheated fuel, put the New fuel to be used is loaded into the inner cylinder 733 .

Example 2:

The utility model provides a thermal power plant waste heat recovery and utilization system, please refer to Figure 6, the cylinder cover 74 is: a connecting column 746, a baffle plate 747, and a driving block 748;

The connecting column 746 is inserted on the inner wall of one end of the inner cylinder 733, and a sealing ring is arranged between the connecting column 746 and the inner cylinder 733, and one end of the connecting column 746 is fixedly installed with a baffle plate 747, and the driving block 748 is fixedly installed on the baffle plate 747;

Working principle: After preheating the fuel in one group of inner tubes 733, close one group of solenoid valves and start another group of solenoid valves, so that high-temperature smoke flows into another group of heat exchange mechanisms 70. At this time, The connecting column 746 is removed through the drive block 748. Afterwards, the preheated fuel is taken out from the inner cylinder 733 and transported to the thermal power plant for use. After the preheated fuel is taken out, the new fuel to be The used fuel is loaded into the inner cylinder 733 .

While the invention has been described above with reference to the embodiments, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, all the features in the embodiments disclosed in the present utility model can be used in combination with each other in any way, and the description of these combinations is not exhaustive in this specification. For the sake of omitting space and saving resources. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (9)

1. Waste heat recovery utilizes system in thermal power plant, its characterized in that includes:

the smoke exhaust pipe (10) is used for conveying high-temperature smoke generated by the thermal power plant;

a dust remover (20) for removing dust from the high temperature flue gas;

a desulfurizing tower (40) for desulfurizing the high-temperature flue gas;

the heat exchange mechanism (70) is used for preheating fuel to be used by utilizing high-temperature flue gas;

wherein, specifically:

one end of the smoke exhaust pipe (10) is connected with the air inlet end of the dust remover (20), the air outlet end of the dust remover (20) is connected with the air inlet end of the desulfurizing tower (40) through a first pipeline (30), the air outlet end of the desulfurizing tower (40) is fixedly connected with a second pipeline (50), one end of the second pipeline (50) is fixedly connected with two groups of third pipelines (60) provided with electromagnetic valves on the second pipeline through a three-way joint, and one end of each group of third pipelines (60) is connected with a group of heat exchange mechanisms (70).

2. The heat-engine plant waste heat recovery and utilization system according to claim 1, wherein the heat exchange mechanism (70) comprises:

a bracket (71);

an air inlet assembly (72) for conveying high-temperature flue gas, and the air inlet assembly (72) is arranged on the bracket (71);

a heating component (73) for preheating fuel by utilizing high-temperature flue gas conveyed by the air inlet component (72), wherein the heating component (73) is arranged on the bracket (71);

a conveying component (75) for conveying the preheated flue gas, wherein the conveying component (75) is arranged on the bracket (71);

and a driving component (76) for rotating the heating component (73) by utilizing the flue gas conveyed by the conveying component (75), wherein the driving component (76) is arranged on the bracket (71).

3. A thermal power plant waste heat recovery and utilization system according to claim 2, wherein the bracket (71) comprises:

a bottom plate (711);

and a side plate (712), wherein the side plate (712) is fixedly installed on one side of the top of the bottom plate (711).

4. A thermal power plant waste heat recovery system according to claim 3, wherein the air intake assembly (72) comprises:

a block (721), the block (721) being fixedly installed on the top of the bottom plate (711), and an inner wall of one end of the block (721) being fixedly installed with a third pipe (60);

a flow channel (722), wherein the inner wall of the square (721) is provided with the flow channel (722);

and the inner wall of the top end of the square block (721) is fixedly provided with a plurality of hard pipes (723).

5. A thermal power plant waste heat recovery system according to claim 3, wherein the heating assembly (73) comprises:

the outer barrel (731), a plurality of hard pipes (723) are fixedly arranged on the inner wall of the bottom end of the outer barrel (731), and an air inlet pipe (753) is fixedly arranged on the inner wall of the top end of the outer barrel (731);

the inner walls of the two ends of the outer cylinder (731) are fixedly provided with the supporting plates (732);

the inner wall of the supporting plate (732) is rotationally connected with the inner cylinder (733) through a bearing, a connecting plate is fixedly arranged on the inner wall of one end of the inner cylinder (733), and the inner wall of the other end of the inner cylinder (733) is detachably connected with a cylinder cover (74);

the rotating shaft (734) is rotatably connected to the side plate (712) through a bearing, and one end of the rotating shaft (734) is fixedly provided with a connecting plate.

6. A thermal power plant waste heat recovery system according to claim 3, wherein the conveying assembly (75) comprises:

a fixing plate (751), the fixing plate (751) being fixedly mounted on a top end side of the side plate (712);

an air pump (752), the air pump (752) being fixedly installed on top of the fixing plate (751);

the air inlet pipe (753), the input end of the air pump (752) is fixedly provided with the air inlet pipe (753);

and the air outlet pipe (754) is fixedly arranged at the output end of the air pump (752), and the air outlet pipe (754) is fixedly arranged at the output end of the air pump (752).

7. A thermal power plant waste heat recovery system according to claim 3, wherein the drive assembly (76) comprises:

a seal box (761), wherein the seal box (761) is fixedly arranged on one side of the side plate (712), and an air outlet pipe (754) is fixedly arranged on the inner wall of the top end of the seal box (761);

a rotating block (762) positioned in the inner cavity of the sealing box (761), wherein a rotating shaft (734) is fixedly arranged on the inner wall of the rotating block (762);

the outer surface of the rotating block (762) is fixedly provided with a plurality of rotating plates (763), and a group of rotating plates (763) are positioned right below the air outlet pipe (754);

the air outlet hole (764) is formed in the inner wall of the bottom end of the sealing box (761).

8. The waste heat recovery and utilization system of a thermal power plant according to claim 5, wherein the cylinder cover (74) is:

the inner wall of one end of the inner cylinder (733) is fixedly provided with a plurality of supporting blocks (742);

and the sealing plate (741) is detachably connected to the supporting block (742) through screws.

9. The waste heat recovery and utilization system of a thermal power plant according to claim 5, wherein the cylinder cover (74) is:

the connecting column (746), the connecting column (746) is inserted on the inner wall of one end of the inner cylinder (733), and a sealing ring is arranged between the connecting column (746) and the inner cylinder (733);

a baffle (747), wherein one end of the connecting column (746) is fixedly provided with the baffle (747);

and a driving block (748), wherein the driving block (748) is fixedly arranged on the baffle (747).

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