Desulfurization and denitrification wastewater zero discharge device

Abstract

The utility model provides a desulfurization denitration waste water zero discharge device, including: dust removal device, filter screen, switching device and delivery pipe, filter screen is fixed installation in dust removal device, delivery pipe one end is fixed installation in dust removal device one side, switching device includes two slide hole, two slide bar, two baffle plate and telescopic piece, the two slide bar is fixed in the two slide hole, the two baffle plate is fixed in the two slide hole, and the telescopic piece is fixed in the two slide hole. The two sliding holes are formed in the dust removal device, the two sliding rods are slidably connected to the interiors of the two sliding holes correspondingly, and the two baffles are fixedly installed at one ends of the two sliding rods correspondingly. According to the desulfurization and denitrification wastewater zero discharge device provided by the utility model, when the dust removal device flushes and cleans the cloth bag through high-pressure gas, the cloth bag dust removal is switched to the filter screen for temporary dust removal through the switching device, so that when the dust removal device flushes and cleans the cloth bag, the dust removal device can normally carry out dust removal work; and the working efficiency of the dust removal device is improved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a zero-discharge device for desulfurization and denitrification wastewater. Background Technology

[0002] Wastewater refers to the total amount of water discharged during residential activities and runoff rainwater. It includes domestic sewage, industrial wastewater, and other non-useful water such as initial rainwater runoff into drainage pipes and ditches. Generally, it refers to water that cannot be recycled after certain technical treatment or water that is too difficult to be purified to meet certain standards after primary pollution.

[0003] The prior art patent application with publication number CN219079148U describes a process where, during desulfurization, the desulfurization wastewater generated by the desulfurization tower is atomized and dried by a rotary atomizing dryer before entering the bypass flue. Flue gas from the front flue of the air preheater enters the bypass flue, heating the desulfurization wastewater and drying it into particles. These particles then enter a dust collector, which removes dust and recovers the particles, meeting the requirement of zero discharge of desulfurization wastewater. However, during boiler startup, shutdown, and low-load operation, the flue gas temperature generated by the boiler cannot meet the requirements for denitrification and desulfurization wastewater evaporation. In this case, a hot blast stove generates high-temperature flue gas through a heating device. This high-temperature flue gas mixes with the flue gas in the boiler, and the resulting flue gas temperature meets the requirements for denitrification and desulfurization wastewater evaporation. Simultaneously, the hot air generated by the hot blast stove can enter the bypass flue through a branch duct, increasing the temperature within the bypass flue and ensuring more thorough drying of the desulfurization wastewater. This invention enables the denitrification system to operate at all times, ensuring that the outlet flue gas temperature of the denitrification unit meets the heat source requirements for zero discharge of desulfurization wastewater under any load, and increasing the flexibility of the unit to participate in peak shaving.

[0004] However, when a baghouse dust collector is in use, it uses high-pressure gas to wash and clean the filter bags. This high-pressure gas cleaning of the filter bags can affect the filtration efficiency of the dust collector.

[0005] Therefore, it is necessary to provide a zero-discharge device for desulfurization and denitrification wastewater to solve the above-mentioned technical problems. Utility Model Content

[0006] This invention provides a zero-discharge device for desulfurization and denitrification wastewater, which solves the problem that the current use of high-pressure gas to wash and clean filter bags affects the filtration effect of filter bags.

[0007] To solve the above-mentioned technical problems, this utility model provides a zero-discharge device for desulfurization and denitrification wastewater, comprising: a dust removal device, a filter screen, a switching device, and a conveying pipe;

[0008] The filter screen is fixedly installed inside the dust removal device, and one end of the conveying pipe is fixedly installed on one side of the dust removal device;

[0009] The switching device includes two sliding holes, two sliding rods, two baffles, and a telescopic component. The two sliding holes are both opened inside the dust removal device. The two sliding rods are slidably connected to the inside of the two sliding holes. The two baffles are fixedly installed at one end of the two sliding rods. The telescopic component is fixedly installed on the top of the dust removal device.

[0010] Preferably, the telescopic component is an electric push rod, which is fixedly installed on the top of the dust removal device, and its output end is fixedly installed on the top of the baffle.

[0011] Preferably, a cleaning brush is fixedly mounted on the surface of the sliding rod.

[0012] Preferably, the dust removal device is provided with a moving device inside, the moving device including four moving sleeves and four moving blocks, the four moving sleeves are fixedly installed inside the dust removal device, and the four moving blocks are slidably connected to the inside of the four moving sleeves respectively.

[0013] Preferably, the dust removal device is internally equipped with a drive device, which includes a servo motor, a worm gear, and multiple worm wheels. The servo motor is fixedly installed on one side of the dust removal device, the worm gear is rotatably connected to the inside of the dust removal device, and the multiple worm wheels mesh with the worm gear.

[0014] Preferably, the dust removal device is provided with a cleaning device inside, the cleaning device including multiple rotating rods and multiple cams, the multiple rotating rods are rotatably connected to the inside of the dust removal device, and the multiple cams are respectively fixedly connected to the surface of the multiple rotating rods.

[0015] Preferably, one end of each of the plurality of rotating rods is fixedly connected to the interior of the plurality of worm gears.

[0016] Compared with related technologies, the zero-discharge device for desulfurization and denitrification wastewater provided by this utility model has the following beneficial effects:

[0017] This utility model provides a zero-discharge device for desulfurization and denitrification wastewater. By switching the dust removal device, when the dust removal device washes and cleans the filter bags with high-pressure gas, it switches from bag dust removal to temporary dust removal using a filter screen. This allows the dust removal device to perform normal dust removal work while it is being washed and cleaned, thus increasing the working efficiency of the dust removal device. Attached Figure Description

[0018] Figure 1A schematic diagram of the structure of a first embodiment of a zero-discharge device for desulfurization and denitrification wastewater provided by this utility model;

[0019] Figure 2 for Figure 1 The diagram shows the structure of the switching device.

[0020] Figure 3 for Figure 2 The enlarged schematic diagram of part A shown below;

[0021] Figure 4 for Figure 2 The enlarged schematic diagram of section B is shown below;

[0022] Figure 5 A schematic diagram of the structure of a second embodiment of a zero-discharge device for desulfurization and denitrification wastewater provided by this utility model;

[0023] Figure 6 for Figure 5 The diagram shows the structure of the cleaning device.

[0024] The following are the labels in the diagram: 1. Dust removal device; 2. Filter screen; 3. Switching device; 31. Sliding hole; 32. Sliding rod; 33. Baffle; 34. Telescopic component; 4. Cleaning brush; 5. Conveying pipe; 6. Moving component; 61. Moving sleeve; 62. Moving block; 7. Drive device; 71. Servo motor; 72. Worm gear; 73. Worm wheel; 8. Cleaning device; 81. Rotating rod; 82. Cam. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] First Embodiment

[0027] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a zero-discharge device for desulfurization and denitrification wastewater provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of the switching device. Figure 3 for Figure 2 The enlarged schematic diagram of part A shown below; Figure 4 for Figure 2 The enlarged schematic diagram of section B is shown. A zero-discharge device for desulfurization and denitrification wastewater includes: a dust removal device 1, a filter screen 2, a switching device 3, and a conveying pipe 5;

[0028] The filter screen 2 is fixedly installed inside the dust removal device 1, and one end of the conveying pipe 5 is fixedly installed on one side of the dust removal device 1;

[0029] The switching device 3 includes two sliding holes 31, two sliding rods 32, two baffles 33, and a telescopic component 34. The two sliding holes 31 are both opened inside the dust removal device 1. The two sliding rods 32 are slidably connected to the inside of the two sliding holes 31 respectively. The two baffles 33 are fixedly installed at one end of the two sliding rods 32 respectively. The telescopic component 34 is fixedly installed on the top of the dust removal device 1.

[0030] When coal-fired power units start up, shut down, or operate at low loads, the inlet flue gas temperature and outlet flue gas temperature of the denitrification unit cannot meet the denitrification requirements and the heat source requirements for zero discharge of desulfurization wastewater. At this time, the heating device is put into operation. The heating device is a natural gas gun or oil gun with independent air distribution. It can burn and spray intensely and stably with the assistance of combustion air with independent air distribution. The high-temperature flue gas generated by its combustion enters the high-temperature flue gas pipeline from the hot blast stove. The flue gas taken from the reheater position in the boiler furnace enters the high-temperature flue gas pipeline. It is fully mixed with the high-temperature flue gas generated by the combustion of the heating device in the high-temperature flue gas duct. Then, it enters the flue gas duct through the mixed flue gas pipeline and mixes with the original flue gas discharged from the boiler. After mixing, the flue gas temperature meets the denitrification requirements and the heat source requirements for zero discharge of desulfurization wastewater. The mixed flue gas exits from the denitrification unit and enters the flue at the front end of the air preheater. Part of the mixed flue gas enters the bypass flue. Desulfurization and the desulfurization wastewater produced enter the rotary atomizing dryer through the drainage pipe. The desulfurization wastewater is atomized and dried into water mist by the rotary atomizing dryer and enters the bypass flue. The desulfurization wastewater water mist is heated in the bypass flue, the liquid in the water mist evaporates, and the impurities are dried into particles. The particles then enter the dust removal device 1 through the flue, where dust removal device 1 removes and recovers the dust, thereby achieving zero discharge of desulfurization wastewater.

[0031] The dust removal device 1 is a bag filter.

[0032] One end of the conveying pipe 5 is connected to the exhaust pipe of the dust removal device 1, so that the flue gas filtered by the filter screen 2 enters the interior of the exhaust pipe through the conveying pipe 5 and is then discharged.

[0033] The bottom and top of the two baffles 33 are respectively fixedly connected to the two ends of the two sliding rods 32, so as to drive the lower baffle 33 to move when the upper baffle 33 moves, thereby switching the bag filter of the dust removal device 1 to the filter screen 2 for filtration.

[0034] The telescopic component 24 is an electric push rod, which is fixedly installed on the top of the dust removal device 1, and its output end is fixedly installed on the top of the baffle 33.

[0035] The telescopic component 24 is a cylinder or hydraulic rod used to push the baffle 33 to move.

[0036] A cleaning brush 4 is fixedly installed on the surface of the sliding rod 32.

[0037] The cleaning brush 4 is used to move the baffle 33 to clean the filter screen 2 and prevent the filter screen 2 from becoming clogged.

[0038] The dust removal device 1 is equipped with a moving device 6, which includes four moving sleeves 61 and four moving blocks 62. The four moving sleeves 61 are fixedly installed inside the dust removal device 1, and the four moving blocks 62 are slidably connected to the inside of the four moving sleeves 61.

[0039] One side of each of the four movable blocks 62 is fixedly connected to the two sides of the two baffles 33, so that when the baffles 33 move, the four movable blocks 62 move inside the four movable sleeves 61 respectively, thereby increasing the stability of the baffles 33 when they move.

[0040] The working principle of the zero-discharge device for desulfurization and denitrification wastewater provided by this utility model is as follows:

[0041] When in use, when it is necessary to wash the filter bag of the dust collector 1, the upper baffle 33 is moved downward by activating the telescopic component 34, which in turn moves the sliding rod 32 upward inside the sliding hole 31, and at the same time moves the lower baffle 33 downward, so that the lower baffle 33 opens, and the flue gas inside the dust collector 1 is discharged into the conveying pipe 5 through the filter screen 2, and then discharged through the exhaust pipe.

[0042] After cleaning is completed, the telescopic component 34 is activated to reset, thereby causing the upper baffle 33 connected to the sliding rod 32 to move upward and reset inside the sliding hole 31, while simultaneously causing the lower baffle 33 to move and reset.

[0043] Compared with related technologies, the zero-discharge device for desulfurization and denitrification wastewater provided by this utility model has the following beneficial effects:

[0044] This utility model provides a zero-discharge device for desulfurization and denitrification wastewater. By switching device 3, when the dust removal device 1 is washing and cleaning the filter bag with high-pressure gas, the dust removal device 1 switches from bag dust removal to filter screen 2 for temporary dust removal. Thus, while the dust removal device 1 is being washed and cleaned, the dust removal device 1 can still perform normal dust removal work, increasing the working efficiency of the dust removal device 1.

[0045] Second Embodiment

[0046] Please refer to the following: Figure 5 and Figure 6Based on the first embodiment of this application providing a zero-discharge device for desulfurization and denitrification wastewater, the second embodiment of this application proposes another zero-discharge device for desulfurization and denitrification wastewater. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0047] Specifically, the second embodiment of this application provides a zero-discharge device for desulfurization and denitrification wastewater, which differs in that the dust removal device 1 has a drive device 7 inside. The drive device 7 includes a servo motor 71, a worm 72, and multiple worm wheels 73. The servo motor 71 is fixedly installed on one side of the dust removal device 1, the worm 72 is rotatably connected to the inside of the dust removal device 1, and the multiple worm wheels 73 mesh with the worm 72.

[0048] The output end of the servo motor 71 is connected to one end of the worm gear 72 via a coupling, and is used to drive the worm gear 72 to rotate after startup.

[0049] The dust removal device 1 is equipped with a cleaning device 8 inside. The cleaning device 8 includes multiple rotating rods 81 and multiple cams 82. The multiple rotating rods 81 are rotatably connected to the inside of the dust removal device 1, and the multiple cams 82 are respectively fixedly connected to the surface of the multiple rotating rods 81.

[0050] Cam 82 is used to shake the cloth bag of dust removal device 1 when it rotates, thereby shaking off the particles attached to the surface and increasing the cleaning effect.

[0051] One end of each of the multiple rotating rods 81 is fixedly connected to the inside of the multiple worm gears 73.

[0052] When the worm 72 rotates to one side, it drives multiple worm wheels 73 connected to multiple rotating rods 81 to rotate to one side, thereby driving multiple cams 82 to rotate to one side.

[0053] The working principle of the zero-discharge device for desulfurization and denitrification wastewater provided by this utility model is as follows:

[0054] In use, the servo motor 71 is started, which drives the worm gear 72 to rotate, thereby driving multiple worm wheels 73 connected to multiple rotating rods 81 to rotate to one side, thereby causing multiple cams 82 to rotate to one side and beat the internal cloth bag of the dust removal device 1. When cleaning is completed, the servo motor 71 is turned off.

[0055] Compared with related technologies, the zero-discharge device for desulfurization and denitrification wastewater provided by this utility model has the following beneficial effects:

[0056] This utility model provides a zero-discharge device for desulfurization and denitrification wastewater. The drive device 7 drives the cleaning device 8 to rotate, which beats the filter bag of the dust removal device 1, causing the filter bag to shake and shake off the particles attached to the surface, thereby increasing the cleaning effect.

[0057] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A desulfurization and denitrification wastewater zero discharge device, characterized in that, Include: Dust removal device, filter screen, switching device and conveying pipe; The filter screen is fixedly installed in the inside of the dust removal device, and one end of the conveying pipe is fixedly installed on one side of the dust removal device; The switching device includes two sliding holes, two sliding rods, two baffles and an extension piece, the two sliding holes are both arranged in the inside of the dust removal device, the two sliding rods are respectively slidably connected to the inside of the two sliding holes, the two baffles are respectively fixedly installed on one end of the two sliding rods, and the extension piece is fixedly installed on the top of the dust removal device.

2. The desulfurization and denitrification wastewater zero discharge device according to claim 1, characterized in that, The extension piece is an electric push rod, which is fixedly installed on the top of the dust removal device, and the output end is fixedly installed on the top of the baffle.

3. The device according to claim 1, characterized in that, The surface of the sliding rod is fixedly installed with a cleaning brush.

4. The desulfurization and denitrification wastewater zero discharge device according to claim 1, characterized in that, The inside of the dust removal device is provided with a moving device, which includes four moving sleeves and four moving blocks, the four moving sleeves are all fixedly installed in the inside of the dust removal device, and the four moving blocks are respectively slidably connected to the inside of the four moving sleeves.

5. The desulfurization and denitrification wastewater zero discharge device according to claim 4, characterized in that, The inside of the dust removal device is provided with a driving device, which includes a servo motor, a worm and a plurality of worm gears, the servo motor is fixedly installed on one side of the dust removal device, the worm is rotatably connected to the inside of the dust removal device, and the plurality of worm gears are engaged with the worm.

6. The desulfurization and denitrification wastewater zero discharge device according to claim 5, characterized in that, The inside of the dust removal device is provided with a cleaning device, which includes a plurality of rotating rods and a plurality of cams, the plurality of rotating rods are all rotatably connected to the inside of the dust removal device, and the plurality of cams are respectively fixedly connected to the surface of the plurality of rotating rods.

7. The desulfurization and denitrification wastewater zero discharge device according to claim 6, characterized in that, One end of the plurality of rotating rods is respectively fixedly connected to the inside of the plurality of worm gears.

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