Wet desulphurization equipment for boiler flue gas waste heat recovery

Abstract

The utility model relates to the technical field of boilers, in particular to wet desulphurization equipment for boiler flue gas waste heat recovery, which comprises a boiler body, a circulating water tank, supporting legs, a water pumping pipe and a stirring and mixing device, the stirring and mixing device comprises a stirring shaft, stirring blades, a driving assembly and an auxiliary assembly, and the stirring shaft is rotatably connected with the boiler body. The stirring blades are fixedly connected with the stirring shaft, the driving assembly is arranged on the boiler body, the auxiliary assembly is arranged on the boiler body, and in the desulfurization process of the boiler body, when lime water is added into the boiler body for desulfurization, the driving assembly is started, the driving assembly drives the stirring shaft to drive the stirring blades to rotate in the boiler body, and the stirring blades rotate in the boiler body. The lime water is stirred and mixed by the stirring blades, so that the lime water in the boiler body can be stirred and mixed, the lime water in the boiler body is fully stirred, precipitation is avoided, the lime water is effectively utilized, and the desulfurization cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a wet desulfurization device for recovering waste heat from boiler flue gas. Background Art

[0002] At present, boilers are used to remove sulfur from harmful gases. The common method is to spray water on the gas to precipitate the sulfur particles in the gas. However, this method uses a large amount of water resources, resulting in waste of water resources and increased costs.

[0003] Prior art CN219815723U discloses a wet desulfurization boiler, comprising a boiler and a support leg arranged at the bottom of the boiler, a circulating water tank is installed on the surface of the support leg, a fixed pipe is installed between the bottom of the boiler and the circulating water tank, a circulating water pump is installed on one side of the circulating water tank, a pumping pipe is installed on one end of the circulating water pump, a mounting water pipe is installed on the top of the inner wall of the boiler, an atomizing nozzle is arranged on the inner side of the mounting water pipe, a plurality of No. 1 activated carbon adsorption nets are installed in sequence inside the boiler, a No. 2 activated carbon adsorption net is installed on the inner wall of the circulating water tank, and a plurality of No. 1 activated carbon adsorption nets are installed on the inner wall of the circulating water tank. The carbon adsorption net can perform multiple adsorption and desulfurization on the sulfur particles in the flue gas. Then, by starting the circulating water pump, the water inside the circulating water tank is transported to the inside of the installed water pipe through the pumping pipe, and the water is sprayed out through the atomizing nozzle. The sulfur particles in the flue gas generated by the boiler are cleaned by the sprayed water mist, and the sulfur in the flue gas is separated by the gravity of the water, thereby achieving the effect of desulfurization of the flue gas generated in the boiler. The water flowing into the circulating water tank can be filtered and adsorbed by the No. 2 activated carbon adsorption net, so that the water inside the circulating water tank can be recycled.

[0004] However, when the above method is used, the boiler does not have a stirring and mixing function during the desulfurization process, so when the lime water inside is not stirred completely, a certain amount of limestone is easily precipitated inside and cannot be effectively utilized, thereby increasing the desulfurization cost. Utility Model Content

[0005] The utility model aims to provide a wet desulfurization equipment for recovering waste heat from boiler flue gas, which can stir and mix the inside of the boiler during the desulfurization process, so that the lime water in the boiler is fully stirred to avoid precipitation, so that the lime water is effectively utilized and the desulfurization cost is reduced.

[0006] To achieve the above-mentioned purpose, the utility model provides a wet desulfurization equipment for recovering waste heat from boiler flue gas, comprising a boiler body, a circulating water tank, a support leg and a water pumping pipe, wherein the support leg is fixedly connected to the boiler body and is located on one side of the boiler body, the circulating water tank is arranged on the support leg, the water pumping pipe and the circulating water tank are arranged on the boiler body, and further comprises a stirring and mixing device;

[0007] The stirring and mixing device includes a stirring shaft, a stirring blade, a driving assembly and an auxiliary assembly. The stirring shaft is rotatably connected to the boiler body and is located on one side of the boiler body. The stirring blade is fixedly connected to the stirring shaft and is located on one side of the stirring shaft. The driving assembly is arranged on the boiler body, and the auxiliary assembly is arranged on the boiler body.

[0008] Wherein, the driving assembly includes a driving motor and a mounting component, the driving motor is fixedly connected to the boiler body and is located on the boiler body; the mounting component is respectively arranged on the boiler body and the driving motor.

[0009] Wherein, the mounting component includes a positioning plate and a supporting plate, the positioning plate is fixedly connected to the boiler body and is located at one side of the boiler body; the supporting plate is fixedly connected to the positioning plate and is detachably connected to the driving motor.

[0010] Wherein, the auxiliary component includes a heat recovery pipe and a stabilizing component, the heat recovery pipe is fixedly connected to the boiler body and to the circulating water tank; the stabilizing component is arranged on the supporting leg.

[0011] Wherein, the stabilizing member includes a bracket and a positioning seat, the bracket is fixedly connected to the supporting leg and is located on one side of the supporting leg; the positioning seat is fixedly connected to the bracket and is located on one side of the bracket.

[0012] The utility model discloses a wet desulfurization equipment for recovering waste heat from boiler flue gas, comprising a boiler body, a circulating water tank, supporting legs, a water pump and a stirring and mixing device, wherein the stirring and mixing device comprises a stirring shaft, stirring blades, a driving component and an auxiliary component. During the desulfurization process using the boiler body, when lime water is added into the boiler body for desulfurization, the driving component is started, and the driving component drives the stirring shaft to drive the stirring blades to rotate in the boiler body, so that the stirring blades stir and mix the lime water, thereby stirring and mixing the lime water inside the boiler body, so that the lime water in the boiler body is fully stirred to avoid precipitation, so that the lime water is effectively utilized and the desulfurization cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0014] Figure 1 It is a schematic diagram of the overall structure of a wet desulfurization device for recovering waste heat from boiler flue gas according to the first embodiment of the utility model.

[0015] Figure 2 It is a front cross-sectional view of a boiler body according to the first embodiment of the utility model.

[0016] Figure 3 It is a schematic structural diagram of the stirring blade of the first embodiment of the utility model.

[0017] Figure 4 It is a schematic diagram of the overall structure of a wet desulfurization device for recovering waste heat from boiler flue gas according to the second embodiment of the utility model.

[0018] In the figure: 101-boiler body, 102-circulating water tank, 103-support leg, 104-pumping pipe, 105-stirring shaft, 106-stirring blade, 107-driving motor, 108-positioning plate, 109-support plate, 110-hot gas recovery pipe, 201-bracket, 202-positioning seat. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0020] The first embodiment of the present application is:

[0021] See also Figures 1 to 3 ,in Figure 1 This is the overall structural diagram of the wet desulfurization equipment for boiler flue gas waste heat recovery. Figure 2 This is a front cross-sectional view of the boiler body. Figure 3 It is a structural schematic diagram of a stirring blade. The utility model provides a wet desulfurization equipment for recovering waste heat from flue gas of a boiler: it includes a boiler body 101, a circulating water tank 102, a support leg 103, a pumping pipe 104 and a stirring and mixing device, the stirring and mixing device includes a stirring shaft 105, a stirring blade 106, a driving assembly and an auxiliary assembly, the driving assembly includes a driving motor 107 and a mounting member, the mounting member includes a positioning plate 108 and a supporting plate 109, and the auxiliary assembly includes a hot gas recovery pipe 110 and a stabilizing member. The above-mentioned scheme solves the problem that the boiler does not have a stirring and mixing function in the desulfurization process, so that when the internal lime water is not stirred completely, a certain amount of limestone is easily precipitated inside, which cannot be effectively utilized, thereby increasing the desulfurization cost. It can be understood that the above-mentioned scheme can be used to enable the boiler to be stirred and mixed in the process of using the boiler for desulfurization, so that the lime water in the boiler is fully stirred to avoid precipitation, so that the lime water is effectively utilized, and the desulfurization cost is reduced. It can also be used to make the state of the boiler body 101 placed more stable when the boiler is used for desulfurization, thereby improving the safety of the equipment.

[0022] According to the present specific embodiment, the support leg 103 is fixedly connected to the boiler body 101 and is located on one side of the boiler body 101. The circulating water tank 102 is arranged on the support leg 103. The pumping pipe 104 and the circulating water tank 102 are arranged on the boiler body 101. The support leg 103 is welded to the lower surface of the boiler body 101. The support leg 103 is used to support the boiler body 101. The circulating water tank 102 is installed on the surface of the support leg 103. A fixed pipe is installed between the bottom of the boiler body 101 and the circulating water tank 102. A circulating water pump is installed on one side of the circulating water tank 102. The pumping pipe 104 is installed on one end of the circulating water pump. The top of the inner wall of the boiler body 101 is installed with an installation water pipe, and an atomizer is arranged inside the installation water pipe. Nozzle, multiple No. 1 activated carbon adsorption nets are installed in sequence inside the boiler body 101, and a No. 2 activated carbon adsorption net is installed on the inner wall of the circulating water tank 102. Multiple No. 1 activated carbon adsorption nets can be used to perform multiple adsorption desulfurization on the sulfur particles in the flue gas. Then, by starting the circulating water pump, the water inside the circulating water tank 102 is transported to the inside of the installed water pipe through the pumping pipe 104, and the water is sprayed out through the atomizing nozzle. Then, the sulfur particles in the flue gas generated by the boiler body 101 are cleaned by the sprayed water mist, and the sulfur in the flue gas is separated by the gravity of the water, thereby achieving the effect of desulfurization of the flue gas generated in the boiler body 101. The water flowing into the circulating water tank 102 can be filtered and adsorbed by the No. 2 activated carbon adsorption net, so that the water inside the circulating water tank 102 can be recycled.

[0023] The stirring shaft 105 is rotatably connected to the boiler body 101 and is located on one side of the boiler body 101. The stirring blade 106 is fixedly connected to the stirring shaft 105 and is located on one side of the stirring shaft 105. The driving component is arranged on the boiler body 101. The auxiliary component is arranged on the boiler body 101. The number of the stirring shafts 105 is two. The two stirring shafts 105 are respectively arranged on both sides of the bottom of the inner cavity of the boiler body 101. The number of the driving components is two groups. The two groups of driving components are divided into The stirring blades 106 are arranged on both sides of the bottom of the outer surface of the boiler body 101, respectively. The driving component drives the stirring shaft 105 to rotate in the boiler body 101. The stirring shaft 105 is provided with stirring blades 106. The number of the stirring blades 106 is at least three times the number of the stirring shaft 105. Every three stirring blades 106 form a group. The stirring blades 106 are arranged on the stirring shaft 105 at an interval of 60 degrees with the center of the stirring shaft 105 as the starting point, so that when the stirring shaft 105 rotates under the action of the driving component, it can drive the stirring blades 106 to rotate. The stirring blade 106 rotates, so that the stirring blade 106 stirs the lime water in the boiler body 101, mixes it fully, and avoids precipitation. The stirring blade 106 is evenly arranged with through holes, and the through holes penetrate the stirring blade 106, so that the stirring blade 106 can reduce resistance when stirring the lime water, play an energy-saving role, and make the mixing effect better. The auxiliary component is arranged on the boiler body 101. The setting of the auxiliary component can recycle the flue gas waste heat generated during desulfurization. During the desulfurization process using the boiler body 101, when lime water is added to the boiler body 101 for desulfurization, the driving component is started, and the driving component drives the stirring shaft 105 to drive the stirring blade 106 to rotate in the boiler body 101, so that the stirring blade 106 stirs and mixes the lime water, so that the lime water inside the boiler body 101 can be stirred and mixed, so that the lime water in the boiler body 101 is fully stirred to avoid precipitation, so that the lime water is effectively utilized and the desulfurization cost is reduced.

[0024] Secondly, the driving motor 107 is fixedly connected to the boiler body 101 and is located on the boiler body 101; the positioning plate 108 is fixedly connected to the boiler body 101 and is located on one side of the boiler body 101; the supporting plate 109 is fixedly connected to the positioning plate 108 and is detachably connected to the driving motor 107. The number of the driving motors 107 corresponds to the number of the stirring shafts 105. The two driving motors 107 are respectively fixed to both sides of the lower surface of the boiler body 101 by bolts. The driving motor 107 is in the form of a DC motor. The output shaft of the driving motor 107 passes through the bottom of the boiler body 101 and is fixed to the stirring shaft 105, so that when the driving motor 107 is started, the output shaft of the driving motor 107 moves at a uniform speed. The stirring shaft 105 is driven to rotate in a circular motion, thereby driving the stirring blade 106 to rotate, so that the lime water in the boiler body 101 is stirred and mixed. There are two positioning plates 108, and the two positioning plates 108 are symmetrically welded on both sides of the lower surface of the boiler body 101. The number of the support plates 109 corresponds to the number of the positioning plates 108. The support plates 109 are vertically welded on the positioning plates 108. The upper surface of the support plate 109 abuts against the bottom of the drive motor 107, thereby supporting the drive motor 107. The positioning plates 108 and the support plates 109 form an incompletely closed space, so that the drive motor 107 is in an air circulation environment, which has a heat dissipation effect on the drive motor 107.

[0025] At the same time, the hot gas recovery pipe 110 is fixedly connected to the boiler body 101 and to the circulating water tank 102; the stabilizing member is arranged on the supporting leg 103, the hot gas recovery pipe 110 is a tubular structure, one end of the hot gas recovery pipe 110 is inserted into the boiler body 101 and is located at one-fourth of the height of the boiler body 101, and the other end of the hot gas recovery pipe 110 is inserted into the circulating water tank 102, so that when desulfurization is carried out inside the boiler body 101, part of the hot gas enters the hot gas recovery pipe 110, and the hot gas recovery pipe 110 transports the hot gas to the circulating water tank 102, so that the hot gas heats the water in the circulating water tank 102, recovers the waste heat of the flue gas in the boiler body 101, and the separation effect can be improved after the water in the circulating water tank 102 is heated.

[0026] When using a wet desulfurization equipment for recovering waste heat from boiler flue gas of this embodiment, during the desulfurization process using the boiler body 101, when lime water is added into the boiler body 101 for desulfurization, the drive motor 107 is started, and the output shaft of the drive motor 107 performs uniform circular motion, thereby driving the stirring shaft 105 to rotate synchronously in the boiler body 101, so that the stirring shaft 105 drives the stirring blade 106 to rotate, so that the stirring blade 106 stirs and mixes the lime water, thereby stirring and mixing the lime water inside the boiler body 101, so that the lime water in the boiler body 101 is fully stirred to avoid precipitation, so that the lime water is effectively utilized and the desulfurization cost is reduced.

[0027] The second embodiment of the present application is:

[0028] Based on the first embodiment, please refer to Figure 4 , Figure 4 It is a schematic diagram of the overall structure of a wet desulfurization device for recovering waste heat from boiler flue gas according to the second embodiment. The stabilizing component of this embodiment includes a bracket 201 and a positioning seat 202 .

[0029] According to this specific embodiment, the bracket 201 is fixedly connected to the support leg 103 and is located on one side of the support leg 103; the positioning seat 202 is fixedly connected to the bracket 201 and is located on one side of the bracket 201. The number of the brackets 201 corresponds to the number of the support legs 103. The vertical cross-section of the bracket 201 is an inverted concave shape. The number of the positioning seats 202 is twice the number of the brackets 201. Every two positioning seats 202 form a group and are respectively welded on the lower surface of the bracket 201. At the left and right ends, the lower surface of the positioning seat 202 and the lower surface of the supporting leg 103 are in the same plane, and the positioning seat 202 and the supporting leg 103 are made of the same material. The arrangement of the bracket 201 and the positioning seat 202 increases the contact area between the supporting leg 103 and the ground, thereby increasing the resistance between the supporting leg 103 and the ground, so that when the boiler body 101 is placed and used, the state of the supporting leg 103 is more stable, and the boiler body 101 is effectively supported.

[0030] When using a wet desulfurization device for recovering waste heat from boiler flue gas according to this embodiment, the support leg 103 is placed on the ground. With the cooperation of the bracket 201 and the positioning seat 202, the support leg 103 increases the contact surface with the ground, thereby increasing the resistance between the support leg 103 and the ground, so that when the boiler body 101 is placed and used, the state of the support leg 103 is more stable, and the boiler body 101 is effectively supported.

[0031] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A wet desulfurization equipment for recovering waste heat from flue gas from a boiler, comprising a boiler body, a circulating water tank, a support leg and a pumping pipe, wherein the support leg is fixedly connected to the boiler body and is located on one side of the boiler body, the circulating water tank is arranged on the support leg, and the pumping pipe and the circulating water tank are arranged on the boiler body, characterized in that: Also includes a stirring and mixing device; The stirring and mixing device includes a stirring shaft, a stirring blade, a driving assembly and an auxiliary assembly. The stirring shaft is rotatably connected to the boiler body and is located on one side of the boiler body. The stirring blade is fixedly connected to the stirring shaft and is located on one side of the stirring shaft. The driving assembly is arranged on the boiler body, and the auxiliary assembly is arranged on the boiler body.

2. The wet desulfurization equipment for recovering waste heat from boiler flue gas according to claim 1, characterized in that: The driving assembly comprises a driving motor and a mounting member. The driving motor is fixedly connected to the boiler body and is located on the boiler body. The mounting member is respectively arranged on the boiler body and the driving motor.

3. The wet desulfurization equipment for recovering waste heat from boiler flue gas according to claim 2, characterized in that: The mounting component comprises a positioning plate and a supporting plate. The positioning plate is fixedly connected to the boiler body and is located at one side of the boiler body. The supporting plate is fixedly connected to the positioning plate and is detachably connected to the driving motor.

4. The wet desulfurization equipment for recovering waste heat from boiler flue gas according to claim 1, characterized in that: The auxiliary component includes a heat recovery pipe and a stabilizing component. The heat recovery pipe is fixedly connected to the boiler body and to the circulating water tank. The stabilizing component is arranged on the supporting leg.

5. The wet desulfurization equipment for recovering waste heat from boiler flue gas according to claim 4, characterized in that: The stabilizing member comprises a bracket and a positioning seat, wherein the bracket is fixedly connected to the supporting leg and is located at one side of the supporting leg; the positioning seat is fixedly connected to the bracket and is located at one side of the bracket.

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