An integrated oxidation blower for a desulfurization tower

Abstract

This application relates to an integrated oxidation blower for a desulfurization tower, and relates to the technical field of waste gas desulfurization. The blower comprises a cabinet; a blower disposed within the cabinet; an air inlet duct connected between the blower's air inlet and the cabinet's sidewall for directing air outside the cabinet into the blower; a muffler chamber disposed horizontally on the air inlet duct, the inner bottom of which is provided with a dust removal liquid for adsorbing dust; a dust removal assembly connected to the muffler chamber for supplying and removing the dust removal liquid into and from the muffler chamber; muffler panels are alternately disposed on the inner top and bottom walls of the muffler chamber; and the longitudinal cross-section of the muffler chamber is larger than the longitudinal cross-section of the air inlet duct. This application reduces noise pollution from the oxidation blower and reduces interference from dust on the oxidation blower.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas desulfurization, and in particular to an integrated oxidation blower for a desulfurization tower. Background Art

[0002] Thermal power plants produce waste gas containing sulfur dioxide during the production process. Once discharged into the atmosphere, it will have an impact on the environment. In severe cases, it may even form acid rain and cause environmental disasters.

[0003] In order to treat sulfur dioxide in the exhaust gas, thermal power plants are equipped with desulfurization towers to absorb and react with sulfur dioxide in the exhaust gas. The principle is to make crushed limestone into a slurry fluid and send it into the desulfurization tower to produce a chemical reaction with sulfur dioxide. This process must have sufficient air to ensure the full reaction of sulfur dioxide. Therefore, an oxidation fan is needed for aeration.

[0004] With respect to the above-mentioned related technologies, the inventors found that the oxidation blowers used in most thermal power plants are single Roots blowers or multiple Roots blowers in parallel, which cause large noise pollution during use and easily inhale dust and debris in the air, affecting the normal operation of the oxidation blower. Summary of the Invention

[0005] In order to reduce the noise pollution of the oxidation blower and reduce the interference of dust on the oxidation blower, the present application provides an integrated oxidation blower for a desulfurization tower.

[0006] The present application provides an integrated oxidation blower for a desulfurization tower using the following technical solutions:

[0007] An integrated oxidation blower for a desulfurization tower, comprising:

[0008] Cabinets;

[0009] A blower is arranged in the cabinet;

[0010] The air inlet duct is connected between the air inlet of the blower and the side wall of the cabinet, and is used to guide the air outside the cabinet into the blower;

[0011] The silencer chamber is horizontally arranged on the air inlet pipe, and a dust removal liquid is provided at the inner bottom for absorbing dust;

[0012] The dust removal component is connected to the silencer chamber and is used for feeding and sucking out dust removal liquid into and out of the silencer chamber.

[0013] By adopting this technical solution, the silencer chamber silences the air entering the intake duct, reducing the amount of noise transmitted from the duct out of the cabinet and reducing noise pollution from the oxidation blower. After the air enters the silencer chamber, the entrained dust falls due to gravity and is absorbed by the dust removal fluid within the chamber, removing dust from the air and reducing the amount of dust entering the blower through the intake duct. The silencer chamber not only reduces noise but also provides space for the dust removal components to operate, saving space and making the overall size of the oxidation blower smaller.

[0014] Optionally, the longitudinal cross-section of the silencing chamber is larger than the longitudinal cross-section of the air inlet pipe.

[0015] By adopting the above technical solution, the longitudinal section of the silencer cavity is larger than the air inlet pipe, and expansion and contraction will occur along the path of the sound waves. The sound waves are reflected and interfered during the expansion and contraction process, thereby reducing noise.

[0016] Optionally, silencer plates are alternately provided on the inner top wall and the inner bottom wall of the silencer cavity.

[0017] By adopting the above technical solution, the sound-absorbing board can increase the reflection and interference of noise waves in the sound-absorbing chamber, thereby consuming and weakening the intensity of the noise. The sound-absorbing board can also use a porous sound-absorbing material to enable the sound-absorbing board to have a certain absorption capacity for noise.

[0018] Optional dust removal kit includes:

[0019] A filter is connected to one side of the silencer chamber;

[0020] The first circulation pump is connected between the muffler chamber and the filter.

[0021] By adopting this technical solution, the filter can filter the dust-adsorbed dust removal liquid. The dust-removed dust removal liquid enters the first circulation pump, which provides power to return the dust removal liquid to the muffler chamber. The dust removal liquid completes the cycle of muffler chamber-filter-first circulation pump-muffler chamber, and only regular cleaning of the filter is required.

[0022] Optionally, an overflow box is provided between the silencing chamber and the filter.

[0023] By adopting the above technical solution, the dust removal liquid in the silencer chamber absorbs dust mainly by the upper liquid surface. Most of the dust is attached to the upper liquid surface. After the overflow box is set, the dust removal liquid in the upper layer will preferentially flow into the overflow box, and then enter the filter from the overflow box. The dust removal liquid circulates in the cycle of silencer chamber-overflow box-filter-first circulation pump-silencer chamber. Compared with the dust removal liquid directly entering the filter, under the premise of the same flow rate, the circulation speed of the upper dust removal liquid that absorbs dust is accelerated, which can improve the filtration efficiency. The overflow box can also act as a buffer for the dust removal liquid, making the flow rate of the dust removal liquid entering the filter more uniform.

[0024] Optionally, the oxidation blower further includes a liquid cooling component, which includes:

[0025] A heat absorption pipe connected between the muffler chamber and the first circulation pump, for absorbing heat generated by the blower;

[0026] The heat dissipation pipe is connected between the heat absorption pipe and the silencer cavity and is arranged outside the cabinet;

[0027] The second circulation pump is connected between the heat dissipation pipe and the muffler chamber.

[0028] By adopting this technical solution, the filtered dust removal liquid enters the heat absorption pipe, absorbing heat from the blower, lowering its temperature and keeping it at its normal operating temperature. The absorbed dust removal liquid then enters the heat dissipation pipe outside the cabinet, dissipating the heat to the outside environment. The cooled dust removal liquid then enters the second circulation pump and is pumped by the booster pump into the muffler chamber. The dust removal liquid circulates through the muffler chamber, overflow tank, filter, first circulation pump, heat absorption pipe, heat dissipation pipe, second circulation pump, and muffler chamber, simultaneously removing dust from the air entering the oxidation blower and cooling the blower. This achieves two goals at once, requiring only a single line and reducing the need for pipeline installation.

[0029] Optional liquid cooling components also include:

[0030] A liquid replenishing tank is arranged between the second circulation pump and the muffler chamber;

[0031] The third circulation pump is arranged between the liquid replenishing tank and the muffler chamber.

[0032] By adopting the above technical solution, the replenishment tank can replenish the dust removal fluid in the circulation circuit and also serve as a dust removal fluid reserve tank, allowing the dust removal fluid to be replenished at any time without repeated additions. The dust removal fluid circulation loop follows the path of silencer chamber - overflow tank - filter - first circulation pump - heat absorption pipe - heat dissipation pipe - second circulation pump - replenishment tank - third circulation pump - silencer chamber. The third circulation pump can be installed to relatively isolate the replenishment tank - third circulation pump - silencer chamber portion of the dust removal fluid circulation loop. Changing the pumping speed of the third circulation pump can adjust the dust removal fluid level in the silencer chamber.

[0033] Optionally, an observation window is provided on the fluid replenishment tank.

[0034] By adopting the above technical solution, the observation window can facilitate the operator to observe the dust removal liquid reserves in the liquid replenishment tank through the window, and determine whether it is necessary to add liquid to the liquid storage tank; at the same time, the cleanliness of the dust removal liquid in the liquid storage tank can also be observed through the observation window, which is convenient for judging whether the dust removal liquid in the dust removal liquid circulation is filtered to meet the standards and whether it needs inspection and maintenance.

[0035] Optionally, the blower is a high-speed magnetic levitation blower.

[0036] By adopting the above technical solutions, high-speed magnetic levitation blowers have the advantages of greater energy efficiency and lower noise compared to traditional Roots blowers. The high-speed permanent magnet synchronous motor used in high-speed magnetic levitation blowers is a high-efficiency energy-saving product vigorously promoted by the country. When used with a frequency converter, it is more energy-efficient than the ordinary asynchronous motor used in Roots blowers. The combination of magnetic levitation bearings and bearing controllers eliminates the mechanical bearing friction loss of ordinary motors, reducing the vibration and mechanical friction loss caused by mechanical friction, making it more energy-efficient and eliminating the need for oil changes, eliminating the regular maintenance and oil leak inspection of Roots blowers.

[0037] Optionally, the cross-section of the air inlet of the air inlet duct gradually increases in a direction toward the side wall of the cabinet.

[0038] By adopting the above technical solution, the local resistance coefficient of the trumpet-shaped flared inlet is smaller than that of the straight pipe inlet, which can reduce the blocking effect on the air entering the air inlet pipe and reduce the resistance loss at the inlet.

[0039] In summary, this application includes at least one of the following beneficial technical effects:

[0040] 1. The silencer cavity can silence the air entering the suction pipe, reducing the noise in the suction pipe from being transmitted out of the cabinet through the suction pipe, and reducing the noise pollution of the oxidation fan;

[0041] 2. The silencer cavity also provides space for dust removal operation for the dust removal components, saving space resources and making the overall volume of the oxidation blower smaller;

[0042] 3. Install an overflow box. The upper layer of dust removal liquid will flow into the overflow box first, and then enter the filter from the overflow box. Compared with the dust removal liquid directly entering the filter, under the premise of the same flow rate, the circulation speed of the upper layer of dust removal liquid that absorbs dust is accelerated, which can improve the filtration efficiency. The overflow box also acts as a buffer for the dust removal liquid, making the flow rate of the dust removal liquid entering the filter more uniform;

[0043] 4. The replenishing tank can replenish the dust removal liquid in the circulation line, and can also be used as a reserve tank for the dust removal liquid. The dust removal liquid can be replenished in the circulation line at any time without repeatedly adding the dust removal liquid;

[0044] 5. Compared with the traditional Roots blower, the high-speed magnetic levitation blower used has the advantages of more energy saving and less noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0046] Figure 2 This is a schematic diagram of the embodiment of the present application after the cabinet is hidden;

[0047] Figure 3 This is a schematic diagram of another perspective of the embodiment of the present application after the cabinet is hidden;

[0048] Figure 4 It is a cross-sectional view of the muffler cavity along the direction of the air inlet pipe;

[0049] Figure 5 It is a cross-sectional view of the muffler cavity along the direction perpendicular to the air inlet pipe;

[0050] In the figure, 1. cabinet; 2. blower; 3. air inlet pipe; 4. silencer chamber; 41. silencer plate; 5. dust removal assembly; 51. filter; 52. first circulation pump; 6. overflow tank; 7. liquid cooling assembly; 71. heat absorption pipe; 72. heat dissipation pipe; 73. second circulation pump; 74. liquid replenishing tank; 741. observation window; 75. third circulation pump. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1 -Attached Figure 5 , further details of this application are given.

[0052] This application proposes an integrated oxidation blower for a desulfurization tower, referring to Figure 1 and Figure 2 , including a base, a cabinet 1, a blower 2, an air inlet pipe 3, a silencer chamber 4, a dust removal component 5, a liquid cooling component 7 and a controller.

[0053] The rectangular base and the cabinet 1 are spliced ​​together to form a rectangular box. The controller is set on the side wall of the cabinet 1 and is used to control the electrical appliances in the cabinet 1. Figure 2 and Figure 3The blower 2 is arranged on the base, and the air inlet is connected to the air inlet pipe 3, and the other end of the air inlet pipe 3 is connected to the area outside the cabinet 1; the air inlet pipe 3 is provided with a silencer chamber 4, and the silencer chamber 4 is filled with dust removal liquid; the dust removal component 5 is connected in series with the liquid cooling component 7, so that the dust removal liquid can circulate in the silencer chamber 4, the dust removal component 5 and the liquid cooling component 7. The dust removal liquid can absorb the dust entrained in the air in the silencer chamber 4, and enter the liquid cooling component 7 after being filtered and purified by the dust removal component 5. The liquid cooling component 7 cools the blower 2 through the dust removal liquid, and then sends the dust removal liquid after heat dissipation back to the silencer chamber 4.

[0054] The silencer chamber 4 can silence the air in the air inlet pipe 3, thereby reducing the noise pollution of the oxidation blower. The dust removal liquid in the silencer chamber 4 can absorb the dust contained in the air sucked into the air inlet pipe 3, so that less dust eventually enters the blower 2, thereby reducing the interference of the dust on the oxidation blower. The dust removal liquid works simultaneously in the dust removal component 5 and the liquid cooling component 7, achieving the functions of dust removal for the air entering the oxidation blower and cooling the blower 2. Only one line is required to complete both functions, thus reducing the number of pipes required. The silencer chamber 4 not only reduces noise, but also provides a dust removal operation space for the dust removal component 5, thus saving space resources and making the overall size of the oxidation blower smaller.

[0055] A mounting platform for installing blower 2 is provided on the base, and blower 2 is bolted to the mounting platform. The air inlet of blower 2 is horizontal, and the air outlet extends vertically upward from the top of cabinet 1. Blower 2 uses a high-speed magnetic levitation blower, which has the advantages of being more energy-efficient and quieter than traditional Roots blowers. The combination of the high-speed permanent magnet synchronous motor and the frequency converter on the high-speed magnetic levitation blower is more energy-efficient than the ordinary asynchronous motor used on the Roots blower; the combination of the magnetic levitation bearing and the bearing controller eliminates the friction loss of the mechanical bearings of ordinary motors, reduces the vibration and mechanical friction loss caused by mechanical friction, and is also more energy-efficient; there is no need to use mechanical bearings and no need to replace engine oil, which omits the regular maintenance and oil leak inspection of the Roots blower, thereby reducing the cost of use.

[0056] The air inlet of blower 2 is connected to an air inlet duct 3, which is attached to the side wall of cabinet 1. One end of the duct connects to the air outside cabinet 1, and the other end connects to the air inside the blower 2 inlet. The end of the duct 3 connecting to cabinet 1 is a trumpet-shaped flare, welded flush with the outer wall of cabinet 1. The other end is a round tube, flange-connected to the air inlet of blower 2, with a smooth transition between the flare and the round tube. The trumpet-shaped flare has a lower local resistance coefficient than a straight tube inlet, reducing the obstruction to air entering the duct 3 and lowering resistance losses at the inlet.

[0057] A muffler chamber 4 is located in the middle of the circular portion of the air inlet duct 3. This chamber is a horizontally arranged rectangular box that replaces a portion of the circular tube of the air inlet duct 3. It is connected to the circular tube and welded to the cavity 4. The weld is located in the middle of the sidewall of the muffler chamber 4. When sound waves propagate through the muffler chamber 4 within the air inlet duct 3, the propagation path expands and contracts, causing reflection and interference, thus achieving a certain degree of sound attenuation.

[0058] Reference Figure 4 and Figure 5 , silencer plates 41 are vertically bonded to the top and bottom walls of the silencer chamber 4, and the upper and lower silencer plates 41 are staggered, and the length in the vertical direction exceeds half of the height of the silencer chamber 4. The silencer chamber 4 is filled with dust removal liquid. In the embodiment of the present application, there are three silencer plates 41, two on the upper part and one on the lower part, and porous silencer materials are selected. When the air passes through the silencer chamber 4, the entrained dust will fall due to gravity after hitting the silencer plates 41 and be adsorbed by the dust removal liquid below, which plays a role in dust removal for the inhaled air; when the sound waves pass through the silencer plates 41, the reflection phenomenon will increase, and part of the reflected sound waves will be absorbed and consumed in the holes on the silencer plates 41, and part of them will interfere with and offset other sound waves, effectively reducing the noise of the air inlet pipe 3 from being transmitted outward.

[0059] An emptying pipe is provided at the bottom of the muffler chamber 4 for emptying the dust removal liquid in the muffler chamber 4; a valve is provided on the emptying pipe to facilitate control of the on-off state of the emptying pipe.

[0060] An L-shaped overflow box 6 is welded to one side of the muffler chamber 4, connecting it to the interior of the chamber. When the dust removal liquid level in the chamber rises, the upper layer of the liquid overflows into the overflow box 6 from the overflow port connecting the overflow box 6 and the chamber 4. A discharge port is located at the bottom of the overflow box 6, and the bottom of the overflow box 6 gradually decreases toward the discharge port, facilitating the flow of the dust removal liquid to the discharge port. A hinged door is hinged on the top of the overflow box 6, allowing the operator to open the top of the overflow box 6 to inspect the interior of the overflow box 6 and facilitate cleaning.

[0061] Reference Figure 2 and Figure 3 The dust removal assembly 5 includes a filter 51 and a first circulation pump 52. The filter 51 is connected to the discharge port at the bottom of the overflow tank 6 via a pipeline to remove impurities from the dust removal liquid flowing through it. The first circulation pump 52 is connected to the filter 51 via a pipeline to provide circulation power for the dust removal liquid.

[0062] The liquid cooling assembly 7 includes a heat absorption pipe 71, a heat dissipation pipe 72, a second circulation pump 73, a fluid replenishment tank 74, and a third circulation pump 75. The heat absorption pipe 71 is wound around the outside of the motor part of the blower 2 to absorb the heat generated by the motor and keep the motor operating at an appropriate temperature. One end of the heat absorption pipe 71 is connected to the first circulation pump 52 through a pipeline, and the other end is connected to the heat dissipation pipe 72 through a pipeline. The heat dissipation pipe 72 is a serpentine coil, suspended on the outer wall of the cabinet 1, and is used to dissipate heat from the dust removal liquid that has absorbed heat. The other end of the heat dissipation pipe 72 is connected to the second circulation pump 73. The second circulation pump 73 is set on the base and is connected to the heat dissipation pipe 72 and the fluid replenishment tank 74 through a pipeline. It is used to pump the dust removal liquid in the heat dissipation pipe 72 into the fluid replenishment tank 74.

[0063] The refill tank 74 is a rectangular box mounted on a base and embedded in the side wall of the cabinet 1. One horizontal sidewall is flush with the side wall of the cabinet 1 and is equipped with an observation window 741. This observation window 741 is a rectangular piece of glass embedded in the refill tank 74, at the same height as the inner sidewall of the refill tank 74, allowing the operator to observe the conditions within the refill tank 74. A refill tube is also installed on the upper portion of the sidewall of the refill tank 74 where the observation window 741 is located. Dust removal fluid can be added to the refill tank 74 through this tube, and the tube end of the tube is threadedly connected to a cap. A third circulating pump 75 is installed at the top of the refill tank 74. The inlet of the third circulating pump 75 is connected to the bottom of the refill tank 74 via a pipeline, which is used to draw dust removal fluid from the bottom of the refill tank 74.

[0064] Reference Figure 3 and Figure 5 The outlet of the third circulating pump 75 is connected to a liquid supply pipe for supplying dust removal liquid into the silencing chamber 4. A muffler plate 41 on the bottom wall of the silencing chamber 4 divides the chamber into two areas. The liquid supply pipe connects the two areas of the chamber 4 via two branch pipes, with the height of the connection point lower than the height of the overflow port.

[0065] The circulation route of the dust removal liquid is: silencer chamber 4 - overflow tank 6 - filter 51 - first circulation pump 52 - heat absorption pipe 71 - heat dissipation pipe 72 - second circulation pump 73 - liquid replenishing tank 74 - third circulation pump 75 - silencer chamber 4.

[0066] The principle of the circulation of the dust removal liquid in the embodiment of the present application is as follows: the dust removal liquid with dust adsorbed on the upper layer in the silencer chamber 4 overflows into the overflow box 6, enters the first circulation pump 52 after being filtered by the filter 51 and is sent to the heat absorption pipe 71; the dust removal liquid absorbs the heat of the blower 2 and enters the heat dissipation pipe 72, where the absorbed heat is dissipated to the external environment, and then is sent to the liquid replenishment tank 74 through the second circulation pump 73; the dust removal liquid is sucked out by the third circulation pump 75 and sent to the silencer chamber 4 to complete the circulation.

[0067] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. An integrated oxidation blower for a desulfurization tower, characterized in that: include: Cabinet (1); A blower (2) is arranged in the cabinet (1); An air inlet pipe (3) connected between the air inlet of the blower (2) and the side wall of the cabinet (1) and used for introducing air outside the cabinet (1) into the blower (2); The silencer chamber (4) is horizontally arranged on the air inlet pipe (3), and a dust removal liquid for absorbing dust is provided at the inner bottom; A dust removal component (5) is connected to the muffler chamber (4) and is used to deliver and suck out dust removal liquid into and out of the muffler chamber (4); The dust removal component (5) comprises: A filter (51) connected to one side of the muffler chamber (4); A first circulation pump (52) is connected between the muffler chamber (4) and the filter (51); Also included is a liquid cooling assembly (7), which includes: A heat absorption pipe (71) connected between the muffler chamber (4) and the first circulation pump (52) for absorbing heat generated by the blower (2); A heat dissipation pipe (72) is connected between the heat absorption pipe (71) and the muffler cavity (4) and is arranged outside the cabinet (1); A second circulation pump (73) is connected between the heat dissipation pipe (72) and the muffler chamber (4); The liquid cooling component (7) further comprises: A liquid replenishing tank (74) is arranged between the second circulating pump (73) and the muffler chamber (4); The third circulation pump (75) is arranged between the liquid replenishing tank (74) and the muffler chamber (4).

2. The integrated oxidation blower for a desulfurization tower according to claim 1, characterized in that: The longitudinal cross-section of the muffler cavity (4) is larger than the longitudinal cross-section of the air inlet pipe (3).

3. The integrated oxidation blower for a desulfurization tower according to claim 2, characterized in that: Silencing plates (41) are alternately provided on the inner top wall and the inner bottom wall of the silencing cavity (4).

4. The integrated oxidation blower for a desulfurization tower according to claim 1, characterized in that: An overflow box (6) is provided between the muffler chamber (4) and the filter (51).

5. The integrated oxidation blower for a desulfurization tower according to claim 1, characterized in that: The liquid replenishing tank (74) is provided with an observation window (741).

6. The integrated oxidation blower for a desulfurization tower according to claim 1, characterized in that: The blower (2) is a high-speed magnetic suspension blower.

7. The integrated oxidation blower for a desulfurization tower according to claim 1, characterized in that: The cross-section of the air inlet of the air inlet pipe (3) gradually increases in the direction toward the side wall of the cabinet (1).

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