Flue gas waste heat power generation device

Abstract

The utility model relates to a flue gas waste heat power generation device which comprises a steam turbine, a generator and a flue gas treatment assembly, the output end of the flue gas treatment assembly is connected with the steam input end of the steam turbine, and the driving end of the steam turbine is connected with the input end of the generator. The flue gas treatment assembly comprises a flue gas treatment chamber, two groups of fluid directors, a filtering piece and a connecting bracket; and the top of the connecting bracket is connected with the inner wall of the top of the flue gas treatment chamber through bolts. According to the utility model, through the arrangement of the flue gas treatment assembly, flue gas can be discharged after being filtered and desulfurized in the flue gas treatment assembly, so that the environmental pollution caused by flue gas discharge is reduced; in addition, after the flue gas is input into the flue gas treatment assembly to be filtered, moisture in the lime emulsion can be evaporated into water vapor, the water vapor is used for driving an impeller in a steam turbine to rotate and is matched with a power generator to generate power, and therefore flue gas waste heat is recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas power generation, in particular to a flue gas waste heat power generation device. Background Art

[0002] Flue gas refers to a combustible gas produced when coking coal is prepared from several types of bituminous coal and undergoes high-temperature carbonization in a coking furnace, producing coke and tar products at the same time. It is a by-product of the coking industry.

[0003] When the flue gas is used for waste heat, it is mostly sent back to the boiler for recycling through the condenser, circulating water pump, condensate pump, feed water heating device, etc. However, since the flue gas contains sulfur and particulate impurities, if it is used directly for power generation, it is easy to cause impurities to enter the turbine and block the rotation of its impeller, and it will also cause environmental pollution when discharged. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model provides a flue gas waste heat power generation device, which solves the problem that the turbine impeller is easily stuck and the exhaust gas discharge is easy to pollute the environment when the flue gas waste heat power generation is carried out.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas waste heat power generation device, including a steam turbine and a generator, and also including a flue gas treatment component, the output end of the flue gas treatment component is connected to the steam input end of the steam turbine, and the driving end of the steam turbine is connected to the input end of the generator.

[0008] Among them, the flue gas treatment component includes a flue gas treatment chamber, two groups of deflectors, a filter and a connecting bracket. The top of the connecting bracket is connected to the top inner wall of the flue gas treatment chamber by bolts. The filter is connected and fixed to the bottom of the connecting bracket, and the inner cavity of the flue gas treatment chamber is divided into two parts, the two groups of deflectors are respectively installed on the left and right sides of the connecting bracket, and are both located above the filter. The two groups of deflectors are unidirectional and the deflection directions of the two are opposite. Lime emulsion is injected into the lower part of the flue gas treatment chamber.

[0009] Preferably, the flue gas treatment chamber includes an outer shell, an air inlet pipe, an air outlet pipe and a discharge pipe, the air inlet pipe and the air outlet pipe are respectively connected and arranged on two opposite sides of the top of the outer shell, the discharge pipe is connected and arranged at the bottom of the outer shell, and a feeding pipe and an oxygen supply pipe are also connected and arranged on the outer wall of the outer shell, and the feeding pipe and the oxygen supply pipe are respectively facing the inner bottom of the outer shell.

[0010] It is further preferred that the connecting bracket includes a guide section and two groups of support sections, the guide section is in a "Y" shape, the tops of the two inclined surfaces of the guide section are symmetrically fixedly connected with the first connecting section, the two groups of support sections are respectively coplanar with the two inclined surfaces of the guide section, the lower ends of each group of support sections are fixedly connected with the second connecting section, the second connecting section is connected to the adjacent first connecting section by bolts, the top of the support section is connected to the top inner wall of the outer shell by bolts, and the connecting bracket separates the space at the top of the filter element.

[0011] It is further preferred that the deflector includes a connecting plate and a one-way valve, the connecting plate is inserted into the gap between the second connecting section and the first connecting section on the adjacent sides, and the connecting plate is connected to the first connecting section and the second connecting section by bolts, and the one-way valve is installed and fixed in the middle of the connecting plate.

[0012] In a further preferred embodiment, the filter element comprises a filter plate and a fastener, wherein the fastener is formed at the top center of the filter plate and is fixedly connected to the lower end of the guide section, and a plurality of groups of filter holes are formed on the filter plate.

[0013] In a further preferred embodiment, supporting bosses for supporting the filter plate and the connecting plate are formed on the inner walls on both the left and right sides of the outer shell.

[0014] It is further preferred that the flue gas treatment component also includes a screw conveyor and a motor, the motor is mounted and fixed on the outer wall of the flue gas treatment component, and the output end of the motor is fixedly connected to the adjacent end of the screw conveyor, so that the screw conveyor can be rotatably arranged on the inner bottom of the flue gas treatment component.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model provides a flue gas waste heat power generation device, which has the following beneficial effects:

[0017] In the utility model, by setting up the flue gas treatment component, the flue gas can be filtered and desulfurized in the flue gas treatment component before being discharged, thereby reducing the pollution of the flue gas emission to the environment; in addition, after the flue gas is input into the flue gas treatment component for filtration, the water in the lime emulsion can be evaporated into water vapor, which is used to drive the rotation of the impeller in the steam turbine and cooperate with the generator to generate electricity, thereby recycling the waste heat of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a flue gas waste heat power generation device according to an implementation scheme;

[0019] Figure 2 is a schematic diagram of the internal structure of a flue gas treatment component according to the implementation scheme;

[0020] Figure 3 is a schematic diagram of the internal structure of the outer shell according to the implementation scheme;

[0021] Figure 4 is a schematic structural diagram of a flow director according to an embodiment;

[0022] Figure 5 is a schematic structural diagram of a filter element according to an embodiment;

[0023] Figure 6 Schematic diagram of the structure of a connecting bracket according to the embodiment.

[0024] In the figure: 10, flue gas treatment component; 11, flue gas treatment chamber; 111, outer shell; 112, supporting boss; 113, air inlet pipe; 114, air outlet pipe; 115, feeding pipe; 116, oxygen supply pipe; 117, discharge pipe; 12, guide; 121, connecting plate; 122, one-way valve; 13, filter element; 131, filter plate; 132, filter hole; 133, fastener; 14, screw conveyor; 15, motor; 16, connecting bracket; 161, guide section; 162, first connecting section; 163, supporting section; 164, second connecting section; 20, steam turbine; 30, generator. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1 and Figure 2 A flue gas waste heat power generation device includes a flue gas treatment component 10, a steam turbine 20 and a generator 30. The output end of the flue gas treatment component 10 is connected to the steam input end of the steam turbine 20, and the flue gas can be filtered and desulfurized after being input into the flue gas treatment component 10. The water in the lime emulsion in the flue gas treatment component 10 evaporates into water vapor and is then input into the steam turbine 20 to drive the impeller to rotate, and the driving end of the steam turbine 20 is connected to the input end of the generator 30, so that the steam turbine 20 can drive the generator 30 to generate electricity. The steam output end of the steam turbine 20 can also be connected to a condenser, so that the water vapor output from the steam turbine 20 can be cooled and condensed into water and then recycled.

[0027] In this embodiment, the flue gas treatment assembly 10 may include a flue gas treatment chamber 11, two groups of flow guides 12, a filter 13, a screw conveyor 14, a motor 15 and a connecting bracket 16. The top of the connecting bracket 16 is connected to the top inner wall of the flue gas treatment chamber 11 by bolts, and the filter 13 is connected and fixed below the connecting bracket 16, and the inner cavity of the flue gas treatment chamber 11 is divided into two parts, upper and lower. The two groups of flow guides 12 are respectively installed on the left and right sides of the connecting bracket 16 and are both located above the filter 13. The two groups of flow guides 12 are unidirectional and the flow directions of the two groups are opposite. The space at the top of the filter 13 is used to guide the input of flue gas and the output of water vapor; the space below the filter 13 is injected with lime emulsion, which is used for flue gas desulfurization and absorption of waste heat to evaporate water. The motor 15 is fixedly mounted on the outer wall of the flue gas treatment component 10, and the output end of the motor 15 is fixedly connected to the adjacent end of the screw conveyor 14, so that the screw conveyor 14 is rotatably arranged at the inner bottom of the flue gas treatment component 10, thereby pushing the input lime emulsion to the bottom of the filter 13 and stirring the lime emulsion. After the lime emulsion contacts the flue gas, it can absorb sulfur dioxide in the flue gas and generate calcium sulfite, and the calcium sulfite can be oxidized to generate calcium sulfate and be recycled.

[0028] See also Figure 3 The flue gas treatment chamber 11 may include an outer shell 111, a plurality of supporting bosses 112, an air inlet pipe 113, an air outlet pipe 114, a feeding pipe 115, an oxygen supply pipe 116 and a discharge pipe 117. The outer shell 111 may be made of a steel plate that is cut, bent, welded and sprayed with a coating to support the illustrated shape. A plurality of supporting bosses 112 are welded and fixed on the inner wall of the outer shell 111, and are used for auxiliary support of the deflector 12 and the filter element 13, respectively. The air inlet pipe 113 and the air outlet pipe 114 are respectively connected and arranged on opposite sides of the top of the outer shell 111. The air inlet pipe 113 is connected to the flue gas exhaust pipe of the equipment, and the air outlet pipe 114 is connected to the steam turbine 20, and are used for the input of flue gas and the output of water vapor, respectively. The feeding pipe 115 and the oxygen supply pipe 116 are both welded and fixed on the outer wall of the outer shell 111, and the inner cavities of the two are communicated with the inner cavity of the outer shell 111. The feeding pipe 115 and the oxygen supply pipe 116 are both facing the inner bottom of the outer shell 111, so that the lime emulsion and oxygen can be respectively input downward by using the feeding pipe 115 and the oxygen supply pipe 116. The discharge pipe 117 is connected and arranged at the bottom of the outer shell 111, and is used to discharge the generated calcium sulfate. The feeding pipe 115, the oxygen supply pipe 116 and the discharge pipe 117 can all be controlled by valves.

[0029] See also Figure 5The connecting bracket 16 includes a guide section 161 and two groups of support sections 163. The guide section 161 is in a "Y" shape, and the tops of the two inclined surfaces of the guide section 161 are symmetrically fixedly connected with the first connecting section 162; the two groups of support sections 163 are coplanar with the two inclined surfaces of the guide section 161, and the lower ends of each group of support sections 163 are fixedly connected with the second connecting section 164. The second connecting section 164 is connected to the adjacent first connecting section 162 by bolts, and the guide 12 between the two is limited and fixed. The top of the support section 163 is connected to the top inner wall of the outer shell 111 by bolts, and the connecting bracket 16 separates the space at the top of the filter element 13.

[0030] See also Figure 4 , the guide 12 includes a connecting plate 121 and a one-way valve 122. The connecting plate 121 is inserted into the gap between the second connecting section 164 and the first connecting section 162 on the adjacent side, and the connecting plate 121 is connected to the first connecting section 162 and the second connecting section 164 by bolts. One end of the connecting plate 121 close to the inner wall of the outer shell 111 is supported on the adjacent supporting boss 112. The one-way valve 122 is installed and fixed in the middle of the connecting plate 121, and the flow direction of the one-way valve 122 close to the air inlet pipe 113 is from top to bottom; the flow direction of the one-way valve 122 close to the air outlet pipe 114 is from bottom to top. After the flue gas is input, it can flow downward and be filtered by the filter element 13 first, and then contact with the lime emulsion for desulfurization; and after the water evaporates, it can be pressurized to push the one-way valve 122 close to the air outlet pipe 114 to open, so that the water vapor can be discharged through the air outlet pipe 114.

[0031] See also Figure 6 The filter element 13 includes a filter plate 131 and a fastener 133. The fastener 133 is formed at the top center of the filter plate 131, and the fastener 133 is fixedly connected to the lower end of the guide section 161. The lower end of the filter plate 131 close to the outer shell 111 can be supported by the adjacent support boss 112. A plurality of filter holes 132 are formed on the filter plate 131 for preliminary filtering of the smoke.

[0032] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described one by one here. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A flue gas waste heat power generation device, comprising a steam turbine (20) and a generator (30), characterized in that: It also includes a flue gas treatment component (10), wherein the output end of the flue gas treatment component (10) is connected to the steam input end of the steam turbine (20), and the driving end of the steam turbine (20) is connected to the input end of the generator (30). The flue gas treatment assembly (10) comprises a flue gas treatment chamber (11), two groups of flow guides (12), a filter element (13) and a connecting bracket (16); the top of the connecting bracket (16) is connected to the top inner wall of the flue gas treatment chamber (11) by means of bolts; the filter element (13) is connected and fixed to the bottom of the connecting bracket (16) and divides the inner cavity of the flue gas treatment chamber (11) into two upper and lower parts; the two groups of flow guides (12) are respectively installed on the left and right sides of the connecting bracket (16) and are both located above the filter element (13); the two groups of flow guides (12) are unidirectionally guided and the guiding directions of the two groups are opposite; and lime emulsion is injected into the lower part of the flue gas treatment chamber (11).

2. The flue gas waste heat power generation device according to claim 1, characterized in that: The flue gas treatment chamber (11) comprises an outer shell (111), an air inlet pipe (113), an air outlet pipe (114) and a discharge pipe (117); the air inlet pipe (113) and the air outlet pipe (114) are respectively arranged on two opposite sides of the top of the outer shell (111), and the discharge pipe (117) is arranged on the bottom of the outer shell (111).

3. The flue gas waste heat power generation device according to claim 2, characterized in that: The connecting bracket (16) comprises a flow guide section (161) and two groups of supporting sections (163); the flow guide section (161) is in a "Y" shape; the tops of the two inclined surfaces of the flow guide section (161) are symmetrically fixedly connected with first connecting sections (162); the two groups of supporting sections (163) are respectively coplanar with the two inclined surfaces of the flow guide section (161); the lower ends of each group of supporting sections (163) are fixedly connected with second connecting sections (164); the second connecting sections (164) are connected to the adjacent first connecting sections (162) by bolts; the tops of the supporting sections (163) are connected to the top inner wall of the outer shell (111) by bolts; and the connecting bracket (16) separates the space at the top of the filter element (13).

4. The flue gas waste heat power generation device according to claim 3, characterized in that: The deflector (12) comprises a connecting plate (121) and a one-way valve (122); the connecting plate (121) is inserted into a gap between a second connecting section (164) and a first connecting section (162) on adjacent sides; the connecting plate (121) is connected to the first connecting section (162) and the second connecting section (164) by bolts; and the one-way valve (122) is installed and fixed in the middle of the connecting plate (121).

5. The flue gas waste heat power generation device according to claim 4, characterized in that: The filter element (13) comprises a filter plate (131) and a fastener (133), wherein the fastener (133) is formed at the top center of the filter plate (131), and the fastener (133) is fixedly connected to the lower end of the guide section (161), and a plurality of groups of filter holes (132) are formed on the filter plate (131).

6. The flue gas waste heat power generation device according to claim 5, characterized in that: Support bosses (112) for supporting the filter plate (131) and the connecting plate (121) are formed on the inner walls on both the left and right sides of the outer shell (111).

7. A flue gas waste heat power generation device according to any one of claims 2 to 6, characterized in that: A feeding pipe (115) and an oxygen supply pipe (116) are also provided on the outer wall of the outer shell (111) in communication with each other. The feeding pipe (115) and the oxygen supply pipe (116) are respectively directed toward the inner bottom of the outer shell (111).

8. The flue gas waste heat power generation device according to claim 7, characterized in that: The flue gas treatment component (10) further comprises a screw conveyor (14) and a motor (15), wherein the motor (15) is mounted and fixed on the outer wall of the flue gas treatment component (10), and the output end of the motor (15) is fixedly connected to the adjacent end of the screw conveyor (14), so that the screw conveyor (14) can be rotatably arranged on the inner bottom of the flue gas treatment component (10).

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