Potential-of-hydrogen treatment device for household garbage incineration slag
By designing a device for treating the acidity and alkalinity of municipal solid waste incinerator slag, and utilizing a filter system and a mixing tank technology, the device achieves efficient mixing and pH adjustment of acidic and alkaline water, solving the environmental pollution problems of water bodies after washing municipal solid waste incinerator slag and water bodies after flue gas denitrification, meeting emission standards and protecting the environment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-03-03
AI Technical Summary
The alkaline water produced after washing the slag from municipal solid waste incineration plants and the acidic water produced after flue gas denitrification are difficult to mix efficiently, leading to environmental pollution risks. Furthermore, existing technologies cannot effectively adjust the pH of the water to meet emission standards.
A device for treating the acidity and alkalinity of municipal solid waste incinerator slag is designed. Through a symmetrically arranged water storage tank, a filter system, and a mixing tank, the device utilizes spiral blades, stirring blades, and sensors to regulate water flow and mixing, thereby achieving efficient mixing of acidic and alkaline water and adjustment of pH.
It achieves efficient mixing and pH adjustment of wastewater from municipal solid waste incineration slag and flue gas denitrification, reducing environmental pollution risks, making full use of water resources, and meeting emission standards.
Smart Images
Figure CN223963327U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of municipal solid waste incineration slag treatment technology, and in particular to a device for treating the acidity and alkalinity of municipal solid waste incineration slag. Background Technology
[0002] To efficiently treat municipal solid waste, high-temperature incineration is typically used to burn it, significantly reducing its volume and effectively eliminating harmful substances. However, the incinerator ash produced after this high-temperature combustion requires washing if it is to be used as building material or for other purposes. This washing water is usually recycled, and because the pH of the incinerator ash is alkaline, the recycled water becomes highly alkaline after multiple washes. Directly discharging this water into the environment would cause serious pollution.
[0003] In addition, the flue gas produced by the power plant combustion also needs to undergo a certain water washing process to remove the nitrification, and then go through subsequent treatment steps before it can be discharged into the environment. Therefore, the water body after the flue gas is denitrified is highly acidic.
[0004] Therefore, it is essential to efficiently mix the alkaline water produced from the washing process of municipal solid waste incinerator slag with the acidic water produced from flue gas denitrification, and to adjust the pH of the mixed water to meet the corresponding emission standards. Utility Model Content
[0005] The main purpose of this invention is to propose a highly efficient device for treating the pH of municipal solid waste incinerator slag, which aims to efficiently adjust the pH of the water produced after washing municipal solid waste incinerator slag, so as to make full use of water resources and protect the environment.
[0006] To achieve the above objectives, this utility model proposes a device for treating the acidity and alkalinity of municipal solid waste incinerator slag, comprising symmetrically arranged water storage tanks on both sides for storing acidic and alkaline water. The water storage tanks are connected to the initial end of a water conveying channel via a water pump. The water conveying channel includes a first direct current section and a second direct current section, as well as an intermediate transition section connecting the first and second direct current sections. The outlet of the second direct current section conveys water to an intermediate mixing tank via a bend pipe. The alkaline and acidic water are mixed in the intermediate mixing tank, and the acidity and alkalinity of the mixed water are adjusted.
[0007] Preferably, the second DC section is provided with a horizontally arranged central shaft, with helical blades arranged on the outer periphery of the central shaft. The end of the central shaft is connected to a drive motor, which drives the central shaft to rotate and allows the water in the second DC section to be controlled and transported to the bend.
[0008] Preferably, a first filter screen and a second filter screen are sequentially provided at the bottom of the first direct current section from the inlet end to the outlet end, and a third filter screen is provided at the inlet end of the second direct current section. The third filter screen is partially located at the intersection of the second direct current section and the intermediate transition section. The pore size of the first filter screen, the second filter screen, and the third filter screen gradually decreases. A sedimentation tank is provided at the bottom of the first filter screen, the second filter screen, and the third filter screen. The bottom of the sedimentation tank is connected to a discharge pipe, and a switch valve is provided in the middle of the discharge pipe.
[0009] Preferably, the sedimentation tank is provided with at least a first inclined panel and a second inclined panel opposite each other along the water flow direction. The first inclined panel extends in the water inlet direction, and the second inclined panel extends in the water outlet direction. The inclination of the second inclined panel is greater than that of the second inclined panel.
[0010] Preferably, fixed supports are provided on both sides of the middle part of the intermediate mixing tank, and a rotating central shaft is provided between the two fixed supports. The two ends of the rotating central shaft are rotatably connected to the fixed supports. Several swing plates are welded to the outer periphery of the rotating central shaft. The alkaline water and acidic water are mixed and push the swing plates, which drive the rotating central shaft to rotate.
[0011] Preferably, the angle between the central axis of the bend and the water flow direction of the intermediate mixing tank is 30-45°.
[0012] Preferably, a water mixing mechanism is provided in the middle of the intermediate mixing tank. The water mixing mechanism includes an upper shell and a lower shell connected vertically. The center of the upper shell and the lower shell is connected to the drive center shaft. The top of the drive center shaft is connected to the water mixing servo motor. A number of first stirring blades are uniformly welded to the outer periphery of the upper shell, and a number of second stirring blades are uniformly welded to the outer periphery of the lower shell.
[0013] Preferably, the outer diameter of the upper shell is smaller than the outer diameter of the lower shell, the first stirring blade and the second stirring blade rotate in opposite directions, and the water stirring servo motor alternately drives the rotation in opposite directions within a fixed cycle.
[0014] Preferably, a first set of pH sensors is provided in the middle of the intermediate mixing tank and in the same plane perpendicular to the water flow direction. The first set of pH sensors includes at least three sensors and the three sensors are spaced apart. A bypass pipe is provided on the side of the second DC section. A flip valve is provided at the initial end of the bypass pipe. The opening degree of the flip valve is based on the pH value of the water in the middle of the intermediate mixing tank and is used to adjust the pH value of the water in the later section of the intermediate mixing tank.
[0015] The technical solution of this utility model has the following advantages over the prior art:
[0016] The water transport channel of this utility model is configured as a first DC section and a second DC section in parallel, connected by an intermediate transition section, which increases the path length of water flow. With the addition of several filter screens with different pore sizes, the sand and gravel in the water are classified and collected according to their different particle sizes.
[0017] In addition, the present invention provides a solution by setting up vertical and horizontal stirring and mixing devices in the intermediate mixing tank, which allows acidic and alkaline water to be fully mixed. Furthermore, the bypass pipe is opened in accordance with the detection of the pH sensor to ensure that the pH of the final mixed water meets the corresponding neutralization purpose. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0019] Figure 1 This is a top view schematic diagram of the acidity and alkalinity treatment device for municipal solid waste incinerator slag according to this utility model;
[0020] Figure 2 This is a cross-sectional structural diagram of the sedimentation tank of this utility model.
[0021] Explanation of icon numbers:
[0022] 1. Water storage tank; 2. Water pump; 3. Water conveying channel; 31. First direct current section; 32. Second direct current section; 33. Intermediate transition section; 34. Bend; 35. Central shaft; 36. Drive motor; 4. Intermediate mixing tank; 41. Fixed support; 42. Rotating central shaft; 43. Swing plate; 5. Central shaft; 6. First filter screen; 7. Second filter screen; 8. Third filter screen; 9. Sedimentation tank; 91. Discharge pipe; 92. Switch valve; 93. First inclined plate; 94. Second inclined plate; 10. Water stirring mechanism; 101. Upper shell; 102. Lower shell; 103. First stirring blade; 104. Second stirring blade; 11. First set of pH sensors; 12. Bypass pipe; 13. Tilting valve.
[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] This utility model proposes a device for treating the acidity and alkalinity of municipal solid waste incineration slag.
[0026] Please see Figure 1 The acid-base treatment device for municipal solid waste incinerator slag in this embodiment includes symmetrically arranged water storage tanks 1 on the left and right sides for storing acidic and alkaline water. The water storage tanks 1 are connected to the initial end of a water conveying channel 3 via a water pump 2. The pumping end of the water pump 2 extends into the corresponding water storage tank 1, while the outlet end of the water pump 2 is connected to the initial end of the water conveying channel 3. The water conveying channel 3 includes a first direct current section 31, a second direct current section 32, and an intermediate transition section 33 connecting the first direct current section 31 and the second direct current section 32. The outlet end of the second direct current section 32 conveys water to an intermediate mixing tank 4 via a bend pipe 34. The alkaline and acidic water are mixed in the intermediate mixing tank 4, thereby adjusting the acid-base balance of the mixed water.
[0027] In order to control the water delivery speed, the second DC section 32 of this embodiment is provided with a horizontally arranged central shaft 5, and a spiral blade 37 is arranged on the outer periphery of the central shaft 5. The end of the central shaft 5 is connected to a drive motor 36. The drive motor 36 drives the central shaft 35 to rotate, so that the water in the second DC section 32 can be delivered to the bend pipe 34 in an adjustable manner.
[0028] Although the water has been treated, it may still contain some sand and gravel. Without filtration or sedimentation, the sand and gravel will enter the intermediate mixing tank 4 and be difficult to remove. Therefore, this invention provides a first filter screen 6 and a second filter screen 7 at the bottom of the first direct flow section 31 from the inlet to the outlet, and a third filter screen 8 at the inlet of the second direct flow section 32. At the same time, the pore size of the first filter screen 6, the second filter screen 7, and the third filter screen 8 in this embodiment gradually decreases. Therefore, the water entering the water conveying channel 3 through the water pump 2 passes through the first filter screen 6, the second filter screen 7, and the third filter screen 8 in sequence. In the water, smaller sand and gravel particles can be carried by the water and flow to a greater distance. Therefore, smaller sand and gravel particles usually accumulate at the position of the third filter screen 8, while larger sand and gravel particles, due to their greater weight, have a shorter actual travel distance and tend to accumulate at the position of the first filter screen 6. Sand and gravel particles with a diameter between large and small are accumulated at the position of the second filter screen 8.
[0029] Preferably, part of the structure of the third filter screen 8 in this embodiment is located at the intersection of the second direct current section 32 and the intermediate transition section 33. As the sand and gravel pass through the curved intermediate transition section 33, they can be subjected to the frictional force of the wall, which reduces the water flow velocity. Accordingly, the smaller sand and gravel can be better collected or gathered at the location of the third filter screen 8.
[0030] Please see Figure 2 In addition, in this embodiment, the bottom of the first filter screen 6, the second filter screen 7, and the third filter screen 8 are provided with a sedimentation tank 9. The bottom of the sedimentation tank 9 is connected to a discharge pipe 91. A switch valve 92 is provided in the middle of the discharge pipe 91. Therefore, the sand and gravel that have passed through the corresponding filter screens can be collected in the sedimentation tank 9. The collected sand and gravel can be released to the outside by opening or closing the switch valve 92.
[0031] More preferably, the sedimentation tank 9 is provided with at least a first inclined plate 93 and a second inclined plate 94 opposite each other along the water flow direction, and the inclination of the second inclined plate 94 is greater than that of the first inclined plate 93. The first inclined plate 93 extends in the water inlet direction, and the second inclined plate 94 extends in the water outlet direction. The inclination of the first inclined plate 93 is greater than that of the second inclined plate 94, so that the sand and gravel can gradually slide into the sedimentation tank 9 along the inclined surface of the first inclined plate 93. The steeper second inclined plate 94 faces the water inlet direction, which can also prevent the sand and gravel from staying on its surface for a long time, and can generate a certain resistance to the water body, which is fed back to the first inclined plate 93 so that the sand and gravel can slide into the sedimentation tank 9 better.
[0032] Please see Figure 1 In this embodiment, fixed supports 41 are respectively provided on both sides of the middle of the intermediate mixing pool 4. A rotating central shaft 42 is provided between the two fixed supports 41. The two ends of the rotating central shaft 42 are rotatably connected to the fixed supports 41 respectively. Several swing plates 43 are welded to the outer periphery of the rotating central shaft 42. The alkaline water and acidic water mix and push the swing plates 43. The swing plates 43 drive the rotating central shaft 42 to rotate. Therefore, through the continuous push of alkaline water and acidic water on some swing plates 43, the rotating central shaft 42 can be driven to rotate. Correspondingly, other swing plates 43 will also rotate, so that the alkaline water and acidic water undergo preliminary vertical mixing at this place.
[0033] Preferably, the angle between the central axis of the bend 34 and the water flow direction of the intermediate mixing pool 4 is 30-45°, so that the water transported outward through the bend 34 can more efficiently drive the swing plate 43 to rotate about the rotation center axis 42.
[0034] In this embodiment, a water stirring mechanism 10 is provided in the middle of the intermediate mixing tank 4. The water stirring mechanism 10 includes an upper shell 101 and a lower shell 102 connected vertically. The centers of the upper shell 101 and the lower shell 102 are connected to a drive central shaft. The top end of the drive central shaft is connected to a water stirring servo motor (not shown in the figure). A plurality of first stirring blades 103 are uniformly welded to the outer circumference of the upper shell 101, and a plurality of second stirring blades 104 are uniformly welded to the outer circumference of the lower shell 102. Preferably, the outer diameter of the upper shell is smaller than the outer diameter of the lower shell, and the first stirring blades 103 and the second stirring blades 104 rotate in opposite directions. The water stirring servo motor alternately drives the water in opposite directions within a fixed cycle. By driving the drive central shaft to rotate and by reciprocating the water stirring servo motor, the first stirring blades 103 or the second stirring blades 104 can push the mixed water, thereby achieving further mixing of acidic and alkaline water in the horizontal direction. Since the upper shell 101 of this embodiment is located above the lower shell 102, and the reaction force of the upper water body's pushing process is less than the reaction force of the lower water body's pushing process, it is reasonable to set the outer diameter of the upper shell 101 to be smaller than the outer diameter of the lower shell 102, which also makes the water mixing process more efficient.
[0035] In addition, a first set of pH sensors 11 is installed in the middle of the intermediate mixing tank 4 and in the same plane perpendicular to the water flow direction. The first set of pH sensors 11 includes at least three sensors, which are spaced apart. A bypass pipe 12 is provided on the side of the second direct flow section. A flip valve 13 is provided at the initial end of the bypass pipe 12. The opening degree of the flip valve 13 is based on the pH value of the water in the middle of the intermediate mixing tank 4 and is used to adjust the pH value of the water in the later section of the intermediate mixing tank 4. Therefore, the pH value of the mixed water after vertical and horizontal mixing can be detected by the three pH sensors 11. It can detect and consider whether the flowing water meets the corresponding pH requirements. If the alkalinity value is too high or the acidity value is too high, the corresponding flip valve 13 is opened, so that some acidic or alkaline water is further mixed with the mixed water, further adjusting and promoting the final mixed water to meet the pH neutralization requirements.
[0036] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.
Claims
1. A device for treating the acidity and alkalinity of municipal solid waste incinerator slag, characterized in that, It includes symmetrically arranged water storage tanks on both sides for storing acidic and alkaline water. The water storage tanks are connected to the initial end of the water delivery channel via a water pump. The water delivery channel includes a first direct current section and a second direct current section, as well as an intermediate transition section connecting the first direct current section and the second direct current section. The outlet of the second direct current section delivers water to the intermediate mixing tank through a bend pipe. The alkaline water and acidic water are mixed in the intermediate mixing tank, and the pH of the mixed water is adjusted.
2. The acidity / alkalinity treatment device for municipal solid waste incinerator slag as described in claim 1, characterized in that, The second DC section is provided with a horizontally arranged central shaft, with helical blades arranged on the outer periphery of the central shaft. The end of the central shaft is connected to a drive motor, which drives the central shaft to rotate and allows the water in the second DC section to be delivered to the bend in a controllable manner.
3. The acidity / alkalinity treatment device for municipal solid waste incinerator slag as described in claim 2, characterized in that, The bottom of the first DC section is provided with a first filter screen and a second filter screen in sequence from the inlet end to the outlet end. The inlet end of the second DC section is provided with a third filter screen. The structure of the third filter screen is located at the intersection of the second DC section and the intermediate transition section. The pore size of the first filter screen, the second filter screen and the third filter screen gradually decreases. The bottom of the first filter screen, the second filter screen and the third filter screen is provided with a sedimentation tank. The bottom of the sedimentation tank is connected to a discharge pipe. A switch valve is provided in the middle of the discharge pipe.
4. The acidity / alkalinity treatment device for municipal solid waste incinerator slag as described in claim 3, characterized in that, The sedimentation tank is provided with at least a first inclined plate and a second inclined plate opposite each other along the water flow direction. The first inclined plate extends in the water inlet direction and the second inclined plate extends in the water outlet direction. The inclination of the second inclined plate is greater than that of the second inclined plate.
5. The acidity / alkalinity treatment device for municipal solid waste incinerator slag as described in claim 4, characterized in that, Fixed supports are provided on both sides of the middle part of the intermediate mixing tank. A rotating central shaft is provided between the two fixed supports. The two ends of the rotating central shaft are rotatably connected to the fixed supports. Several swing plates are welded to the outer periphery of the rotating central shaft. The alkaline water and acidic water are mixed and push the swing plates, which drive the rotating central shaft to rotate.
6. The acidity / alkalinity treatment device for municipal solid waste incinerator slag as described in claim 5, characterized in that, The angle between the central axis of the bend and the water flow direction of the intermediate mixing tank is 30-45°.
7. The acidity / alkalinity treatment device for municipal solid waste incinerator slag as described in claim 6, characterized in that, The intermediate mixing tank is equipped with a water mixing mechanism, which includes an upper shell and a lower shell connected to each other. The center of the upper shell and the lower shell is connected to the drive center shaft. The top of the drive center shaft is connected to the water mixing servo motor. Several first stirring blades are uniformly welded to the outer circumference of the upper shell, and several second stirring blades are uniformly welded to the outer circumference of the lower shell.
8. The acidity / alkalinity treatment device for municipal solid waste incinerator slag as described in claim 7, characterized in that, The outer diameter of the upper shell is smaller than the outer diameter of the lower shell, the first stirring blade and the second stirring blade rotate in opposite directions, and the water stirring servo motor alternately drives the rotation in opposite directions within a fixed cycle.
9. The acidity / alkalinity treatment device for municipal solid waste incinerator slag as described in claim 8, characterized in that, The intermediate mixing tank is provided with a first set of pH sensors in the same plane perpendicular to the water flow direction. The first set of pH sensors includes at least three sensors and the three sensors are spaced apart. The side of the second DC section is provided with a bypass pipe. The initial end of the bypass pipe is provided with a flip valve. The opening degree of the flip valve is based on the pH value of the water in the middle of the intermediate mixing tank and is used to adjust the pH value of the water in the later section of the intermediate mixing tank.