Lower drive washing device for dynamically regulating and controlling waste incineration fly ash

Abstract

The utility model discloses a lower drive washing device for dynamically regulating and controlling waste incineration fly ash, which dynamically regulates and controls the feeding mode, the feeding proportion and the stirring time of fly ash and water through the linkage among a metering system, a liquid level controller, a density tester and a stirring driving system, effectively improves the dissolving efficiency of the fly ash, avoids the problem that the fly ash is caked and is difficult to dissolve, and improves the quality of the fly ash. Meanwhile, the water-cement ratio in the washing process is optimized. The problems of fly ash particle deposition and direct discharge due to incomplete washing are solved through the combined design of lower drive stirring washing, the rotary scraper and the filter sieve plate, and the fly ash washing efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of water washing of waste incineration fly ash, in particular to a dynamically regulated down-driven water washing device for waste incineration fly ash. Background Art

[0002] A large amount of fly ash is generated during the incineration of domestic waste. The current main treatment process is to further purify and evaporate the washing liquid after multi-stage water washing, and the dechlorinated ash produced by water washing is recycled. The utilization method and extent of the dechlorinated ash depends on the dechlorination effect of the fly ash washing.

[0003] As an important carrier of water washing, the fly ash washing device has various forms. For example, the patent name is a new type of domestic waste incineration fly ash washing device, and the patent application number is CN202021900119.1. It adopts central stirring for water washing, improves the stirring effect by optimizing the stirring paddle blades, and uses the tank wall ultrasonic component and the tank bottom scraper to reduce the accumulation of fly ash. For example, the patent name is an air stirring fly ash water washing pulping device, and the patent application number is CN202320533890.7. On the basis of central stirring water washing, an air outlet duct is added for air-mechanical combined stirring. For example, the patent name is a fly ash stirring and oscillating water washing device coupled with a wastewater desalination and recovery treatment system, and the patent application number is CN202120830731.4. The disturbance rate of fly ash water washing is improved by the water inlet uniformizer, the optimization of the central mixer blades, and the staggered baffle design.

[0004] The above patents have optimized the fly ash washing device and effect from multiple angles. However, in actual washing, fly ash is difficult to dissolve quickly after being added once. Under the action of the mixer, fly ash will still be difficult to dissolve, agglomerate, and clump, which will lead to the problem of increased water consumption for washing and high water-ash ratio. In addition, the agglomerated fly ash is very easy to settle and accumulate, and will be directly discharged from the liquid outlet at the bottom of the washing device, resulting in incomplete washing and poor effect. Summary of the invention

[0005] The purpose of the utility model is to provide a dynamically controlled down-driven water washing device for waste incineration fly ash. Through the linkage of the metering system, the liquid level controller, the density meter, and the stirring drive system, the dosing method and ratio of fly ash and water are dynamically controlled to effectively improve the fly ash dissolution efficiency, avoid the problem of fly ash agglomeration and insolubility, and optimize the water-ash ratio of fly ash water washing. In addition, through the joint design of the down-driven mixer, the scraper and the filter screen plate, the problems of fly ash particle deposition and incomplete direct discharge of water washing are effectively solved, and the fly ash water washing efficiency is improved.

[0006] To solve the above problems, the solution adopted by the utility model is as follows:

[0007] A downward driven water washing device for dynamically regulating fly ash from garbage incineration comprises a water washing tank and a stirring driving system.

[0008] Preferably, a water replenishment inlet and a fly ash inlet are provided on the top of the water washing tank, the water replenishment inlet is connected to a water pump, the water pump is connected to a solenoid valve, the fly ash inlet is connected to a metering scale system, and the metering scale system includes but is not limited to a spiral metering scale and a rotor scale.

[0009] Preferably, a liquid level gauge port is also provided on the top of the water washing tank, and a liquid level controller is connected to the liquid level gauge port, and the liquid level controller is communicatively connected with the solenoid valve and the water pump.

[0010] Preferably, a density meter port is further provided on the top of the water washing tank, and a density measuring instrument is connected to the density meter port, and the density measuring instrument is communicatively connected with the metering scale system, the liquid level controller and the stirring drive system.

[0011] Preferably, the inner wall of the water washing tank is provided with 2-4 baffles evenly distributed in a ring shape, and a flushing water outlet is provided above each of the baffles and on the top of the water washing tank.

[0012] Preferably, a stirring rotor is provided at the bottom center of the water washing tank, a tank bottom scraper is slidably connected below the water washing tank, the tank bottom scraper is connected below the stirring rotor, a filter screen plate is connected to the bottom of the water washing tank, a water washing liquid storage tank is connected below the filter screen plate, and a water washing liquid outlet is provided on the lower left side of the water washing liquid storage tank.

[0013] Preferably, the stirring drive system comprises the stirring rotor, a stirring machine transmission structure, and a motor, the stirring rotor is connected to the stirring machine transmission structure, and the stirring machine transmission structure is connected to the motor.

[0014] Preferably, the filter screen plate is densely covered with circular sieve holes, the diameter of the sieve holes is 1-3 mm, and the total area of ​​the sieve holes is 55%-75% of the area of ​​the filter screen plate.

[0015] Beneficial effects:

[0016] (1) The utility model provides a downward-driven water washing device for dynamically regulating fly ash from waste incineration. The device can dynamically regulate the dosage, frequency, ratio and stirring time of fly ash and water through the properties of fly ash water washing liquid, thereby improving the fly ash dissolution efficiency, effectively improving the problems of fly ash being difficult to dissolve and agglomerate, and optimizing the water-to-ash ratio of the water washing process to improve the water washing efficiency.

[0017] (2) The utility model solves the problem of fly ash particle deposition and incomplete direct discharge due to water washing by using a bottom-driven stirring water washing device combined with a rotating scraper and a filter screen plate design, while ensuring the continuous dissolution and water washing of fly ash particles, improving the fly ash water washing effect, and reducing the concentration of suspended matter in the water washing effluent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural front view of an implementation mode of a down-driven water washing device for dynamically regulating fly ash from garbage incineration according to the utility model.

[0020] Figure 2 It is a structural top view of an implementation mode of a down-driven water washing device for dynamically regulating fly ash from garbage incineration according to the utility model.

[0021] Among them, 1 is a water washing tank, 2 is a water replenishment inlet, 3 is a fly ash inlet, 4 is a metering scale system, 5 is a baffle, 6 is a flushing water outlet, 7 is a stirring rotor, 8 is a scraper, 9 is a filter screen plate, 10 is a water washing liquid storage box, 11 is a water washing liquid outlet, 12 is a mixer transmission structure, 13 is a motor, 14 is a liquid level meter port, 15 is a liquid level controller, 16 is a density meter port, 17 is a density meter, 18 is a solenoid valve, and 19 is a water pump. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Embodiment 1: A downward-driven water washing device with dynamic regulation of waste incineration fly ash comprises a water washing tank 1 and a stirring drive system.

[0024] A water inlet 2 and a fly ash inlet 3 are provided on the top of the water washing tank 1. The water inlet 2 is connected to the electromagnetic valve 18 and the water pump 19, and the fly ash inlet 3 is connected to the metering scale system 4, which respectively control the amount, number and proportion of water and fly ash.

[0025] A liquid level gauge port 14 and a liquid level controller 15 are provided on the top of the water washing tank 1 . The liquid level controller 15 is linked with a solenoid valve 18 and a water pump 19 .

[0026] A density meter port 16 and a density meter 17 are provided on the top of the washing tank 1. The density meter 17 is linked with the metering scale system 4, the liquid level controller 15 and the stirring drive system to dynamically adjust the water-ash ratio and stirring time of the washing process according to the fly ash dissolution and the density of the washing liquid.

[0027] Three baffles 5 are arranged inside the wall of the water washing tank 1 and are evenly distributed in a 120° ring shape; a flushing water inlet 6 is arranged above each baffle 5 to flush the fly ash deposited on the baffle.

[0028] The bottom of the washing tank 1 is low in the center and high around. From top to bottom, the center of the bottom is provided with a stirring rotor 7, a tank bottom scraper 8, a filter screen plate 9, a washing liquid storage box 10, and a washing liquid outlet 11. The tank bottom is provided with 2-4 rotating scrapers 8, which are connected to the bottom structure of the stirring rotor 7, and the rotation direction of the scraper 8 is consistent with the rotation direction of the stirring rotor 7. Below the scraper 8 is the filter screen plate 9, and the fly ash particles are filtered through the circular sieve holes with a diameter of 2 mm on the filter screen plate 9, and the total area of ​​the sieve holes is 60% of the area of ​​the filter screen plate 9. The bottom of the filter screen plate 9 is connected to the washing liquid storage box 10 below, and the washing liquid outlet 11 is on the lower left side of the washing liquid storage box 10.

[0029] The stirring driving system comprises a stirring rotor 7, a stirring machine transmission structure 12 and a motor 13. The stirring rotor 7 is connected to the stirring machine transmission structure 12, and the stirring machine transmission structure 12 is connected to the motor 13. The stirring driving system drives the stirring rotor 7 to rotate and stir the water for washing.

[0030] Embodiment 2: First, water is added to the water washing tank 1 from the water supply inlet 2 through the solenoid valve 18 and the water pump 19 to the liquid level set by the liquid level controller, and then fly ash is added to the water washing tank 1 from the fly ash inlet 3 through the metering scale system 4.

[0031] Then, the motor 13 is turned on, and the stirring rotor 7 is driven by the mixer transmission structure 12 to stir and wash. While the stirring rotor 7 moves, the four scrapers 8 at the bottom of the tank are driven to rotate in the same direction, so that the fly ash deposited on the bottom of the tank is scraped up and continuously washed with water.

[0032] The fly ash solution is more fully washed and mixed under the action of the tank wall baffle 5 . When the fly ash particles are deposited on the baffle 5 , the baffle 5 is flushed through the flushing water inlet 6 .

[0033] The density meter 17 on the top of the washing tank 1 is linked with the stirring drive system. According to the density of the washing liquid fed back by the density meter 17 in real time, the stirring time is adjusted and extended to ensure the washing effect.

[0034] After the washing is completed, the washing liquid enters the washing liquid storage tank 10 through the filter screen plate 9 with a pore size of 1 mm, and the undissolved fly ash particles are retained in the washing tank 1 to continue to dissolve and wash, and the fly ash washing liquid is discharged through the washing liquid outlet 11.

[0035] Example 3: Add washing water to the washing tank 1 through the water inlet 2, control the liquid level to 1 / 2 of the effective liquid level height of the washing tank 1 through the solenoid valve 18 and the water pump 19, and then add fly ash through the metering scale system 4. At this time, the water-ash ratio is controlled to be 1.8:1.0.

[0036] The motor 13 is turned on, and the stirring rotor 7 is driven through the stirring machine transmission structure 12 to stir and wash, and at the same time, the four scrapers 8 at the bottom of the tank are driven to rotate in the same direction to scrape up the deposited fly ash particles for washing.

[0037] The density of the washing liquid is fed back in real time by the density meter 17. After the value is stable, water is continuously added to the washing tank 1 through the solenoid valve 18 and the water pump 19. At this time, the water-cement ratio in the tank is controlled to be 2.8:1.0.

[0038] Continue stirring and washing with water until the value of the density meter 17 is stable, then open the washing liquid outlet 11, and the fly ash washing liquid passes through the filter screen plate 9 with a pore size of 2 mm into the washing liquid storage tank 10 below, and is finally discharged from the washing liquid outlet 11.

[0039] The fly ash particles that are not dissolved during the water washing process are retained in the water washing tank 1 by the filter screen plate 9 and continue to be washed under the rotation of the scraper 8 at the bottom of the tank until they are completely dissolved, washed, pass through the filter screen plate 9, and are discharged from the water washing liquid outlet 11.

[0040] The utility model is not limited to the above-mentioned specific implementation schemes and application fields, which are merely illustrative and instructive, but not restrictive. Under the guidance of this specification, ordinary technicians in this field can also make many forms without departing from the scope of protection of the claims of the utility model, all of which belong to the scope of protection of the utility model.

Claims

1. A down-driven water washing device for dynamically controlling fly ash from garbage incineration, characterized in that: The invention comprises a water washing tank (1) and a stirring drive system; a stirring rotor (7) is provided at the bottom center of the water washing tank (1); the stirring drive system comprises a stirring machine transmission structure (12) and a motor (13); the stirring rotor (7) is connected to the stirring machine transmission structure (12), and the stirring machine transmission structure (12) is connected to the motor (13); a water replenishment inlet (2) and a fly ash inlet (3) are provided at the top of the water washing tank (1); the water replenishment inlet (2) is connected to a water pump (19), the water pump (19) is connected to a solenoid valve (18), and the fly ash inlet (3) is connected to a metering scale system (4).

2. The down-driven water washing device for dynamically controlling fly ash from garbage incineration according to claim 1 is characterized in that: The weighing scale system (4) includes but is not limited to a spiral weighing scale and a rotor scale.

3. A down-driven water washing device for dynamically controlling fly ash from garbage incineration according to claim 2, characterized in that: The top of the water washing tank (1) is also provided with a liquid level gauge port (14), the liquid level gauge port (14) is connected to a liquid level controller (15), and the liquid level controller (15) is communicatively connected to the solenoid valve (18) and the water pump (19).

4. A down-driven water washing device for dynamically controlling fly ash from garbage incineration according to claim 3, characterized in that: The top of the water washing tank (1) is also provided with a density meter port (16), the density meter port (16) is connected to a density measuring instrument (17), and the density measuring instrument (17) is communicatively connected with the metering scale system (4), the liquid level controller (15) and the stirring drive system.

5. The down-driven water washing device for dynamically controlling fly ash from garbage incineration according to claim 1 is characterized in that: The inner wall of the water washing tank (1) is provided with 2 to 4 baffles (5) evenly distributed in an annular shape, and a flushing water outlet (6) is provided above each baffle (5) and at the top of the water washing tank (1).

6. The down-driven water washing device for dynamically controlling fly ash from garbage incineration according to claim 1 is characterized in that: The bottom of the water washing tank (1) is slidably connected to a tank bottom scraper (8), the tank bottom scraper (8) is connected to the bottom of the stirring rotor (7), the bottom of the water washing tank (1) is connected to a filter screen plate (9), the bottom of the filter screen plate (9) is connected to a water washing liquid storage box (10), and the lower left side of the water washing liquid storage box (10) is provided with a water washing liquid outlet (11).

7. A down-driven water washing device for dynamically controlling fly ash from garbage incineration according to claim 6, characterized in that: The filter screen plate (9) is densely covered with circular screen holes, the diameter of the screen holes is 1-3 mm, and the total area of ​​the screen holes is 55%-75% of the area of ​​the filter screen plate.

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