A desalination and stabilization device for fly ash from incineration of domestic waste

Abstract

The utility model provides a desalination and stabilization device for fly ash from incineration of domestic waste, which is a pretreatment device before fly ash filling. The device has the advantages of small footprint, simple operation, simultaneous desalination and heavy metal stabilization, and can effectively reduce the secondary pollution problem in the process of fly ash disposal. The technical scheme of the utility model includes a fly ash silo, a desalination stabilizer, and a washing tank group; the desalination stabilizer includes a desalination outer frame, a stirring member is installed in the desalination outer frame, and a discharge pipe is connected between the desalination outer frame and the fly ash silo; the washing tank group includes a washing tank 1, a first water outlet pipe and a first water inlet pipe are connected between the washing tank 1 and the desalination outer frame, a first water outlet valve is installed on the first water outlet pipe, a first water inlet valve and a first water inlet pump are installed on the first water inlet pipe, and the first water inlet pump can pump the water in the washing tank 1 into the desalination outer frame through the first water inlet pipe, and a wastewater treatment pipe is also provided on the washing tank 1, and a wastewater treatment valve is installed on the wastewater treatment pipe.

Description

Technical Field

[0001] The utility model relates to a garbage treatment device, in particular to a desalination and stabilization device for fly ash from the incineration of domestic garbage. Background Art

[0002] Currently, there are three methods for treating domestic waste: landfill, incineration and composting. Among them, incineration is the first choice in areas with high population density and relatively developed economy due to its advantages such as small footprint, large processing capacity, waste heat recovery and controllable secondary pollution.

[0003] At present, the mainstream method of fly ash treatment in China is to solidify it with cement and then dispose it in a professional landfill. Considering that fly ash contains heavy metals and dioxins, and contains a lot of soluble salts, the fly ash treated and landfilled by the above method contains salts, which can easily cause the cement-solidified fly ash module to break in the environment, and the heavy metals in it can easily re-enter the environment with the dissolution of salts, which can easily lead to secondary pollution problems. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a desalination and stabilization device for fly ash from the incineration of domestic waste. The device is a pretreatment device for fly ash before landfilling. The device occupies a small area and is easy to operate. The fly ash module treated by the device is not easy to weather and break because the salt is removed, and the heavy metals and dioxins therein are more stable because of the addition of chemicals, so it can effectively reduce the secondary pollution problem after the fly ash is disposed of and landfilled.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A desalination and stabilization device for fly ash from incineration of domestic waste, comprising a fly ash silo, a desalination stabilizer, and a washing tank group;

[0007] The desalination stabilizer comprises a desalination outer frame, a stirring member is installed in the desalination outer frame, a discharge pipe is connected between the desalination outer frame and the fly ash silo, the fly ash in the fly ash silo can enter the desalination outer frame through the discharge pipe, and the stirring member is used to stir the fly ash in the desalination outer frame;

[0008] The washing tank group includes a washing tank 1, a first water outlet pipe and a first water inlet pipe are connected between the washing tank 1 and the desalination outer frame, a first water outlet pipe is installed with a first water outlet valve, a first water inlet pipe is installed with a first water inlet valve and a first water inlet pump, the first water inlet pump can pump the water in the washing tank 1 into the desalination outer frame through the first water inlet pipe, and the washing tank 1 is also provided with a wastewater treatment pipe, and a wastewater treatment valve is installed on the wastewater treatment pipe.

[0009] Through the above technical scheme, the fly ash located in the fly ash silo will enter the desalination outer frame through the discharge pipe. At the same time, the first water inlet pump draws the washing liquid in the washing tank one into the desalination outer frame through the first water inlet pipe, and the stirring member will stir the fly ash and the washing liquid in the desalination outer frame at the same time. After stirring reaches a certain degree, the first water outlet valve can be opened, and the washed liquid in the desalination outer frame will flow into the washing tank one along the first water outlet pipe. After repeated operations, if it is detected that the salinity in the washing liquid reaches a certain value, the wastewater treatment valve is opened, and the washing liquid in the washing tank one can be fully or partially discharged through the wastewater treatment pipe and enter the subsequent wastewater treatment unit for wastewater treatment; the above equipment has the advantages of small footprint, simple operation, and effective reduction of secondary pollution problems in the fly ash disposal process.

[0010] Preferably, a balancing pipe is connected between the desalination outer frame and the fly ash silo, and a balancing valve is installed on the balancing pipe.

[0011] Through the above technical scheme, in the process of fly ash entering the desalination outer frame from the fly ash silo, the gas in the space inside the desalination outer frame will be squeezed, and the gas in the internal space of the desalination outer frame can enter the fly ash silo through the balance pipe, thereby achieving air pressure balance between the desalination outer frame and the fly ash silo. Even if there is raised fly ash, the fly ash will re-enter the fly ash silo through the balance pipe.

[0012] Preferably, a discharge valve is installed on the discharge pipe.

[0013] Through the above technical solution, the discharge pipe is controlled on and off by the discharge valve, so that the amount of fly ash entering the desalination outer frame can be controlled.

[0014] Preferably, the discharge pipe and the balance pipe are both provided with a flexible connection section, and the flexible connection section divides the discharge pipe and the balance pipe into an upper pipe and a lower pipe, and the lower pipe can swing around the upper pipe;

[0015] An upper cover is hinged on the desalination outer frame.

[0016] Through the above technical scheme, after repeated stirring and flushing with the washing liquid for several times, fly ash will remain in the desalination outer frame. At this time, the operator can open the upper cover on the desalination outer frame, and then move the entire desalination outer frame. The desalination outer frame can utilize the deformable effect of the flexible connecting section, and the entire desalination outer frame can be turned over to facilitate the smooth pouring out of the fly ash in the desalination outer frame.

[0017] Preferably, the washing tank group further comprises a washing tank 2, on which a second water outlet pipe and a second water inlet pipe are installed, the second water outlet pipe is connected to the first water outlet pipe, and a second water outlet valve is installed on the second water outlet pipe; the second water inlet pipe is connected to the first water inlet pipe, and a second water inlet valve is installed on the second water inlet pipe;

[0018] The second water inlet pipe is provided with a second water inlet pump, and the second water inlet pump can pump the water in the second washing tank into the desalination outer frame through the second water inlet pipe.

[0019] Through the above technical scheme, the second water inlet pump can pump the washing liquid in the washing tank two into the desalination outer frame through the second water inlet pipe. At the same time, the first water outlet valve and the first water inlet pump are closed, and the washing liquid in the washing tank two can participate in the fly ash stirring work in the desalination outer frame; the fly ash in the desalination outer frame is cleaned in turn by the washing liquid in the washing tank one and the washing tank two, and the heavy metals and soluble salts in the fly ash can be treated more thoroughly.

[0020] Preferably, the washing tank group further comprises a washing tank three, on which a third water outlet pipe and a third water inlet pipe are installed, the third water outlet pipe is connected to the first water outlet pipe, and a third water outlet valve is installed on the third water outlet pipe; the third water inlet pipe is connected to the first water inlet pipe, and a third water inlet valve is installed on the second water inlet pipe;

[0021] The third water inlet pipe is provided with a third water inlet pump, and the third water inlet pump can pump the water in the washing tank three into the desalination outer frame through the third water inlet pipe.

[0022] Through the above technical scheme, the third water inlet pump can pump the washing liquid in the washing tank three into the desalination outer frame through the third water inlet pipe. At the same time, the first water outlet valve, the first water inlet pump, the second water outlet valve and the second water inlet pump are closed, and the washing liquid in the washing tank three can participate in the fly ash stirring work in the desalination outer frame; the fly ash in the desalination outer frame is cleaned in turn by the washing liquid in the washing tank one, the washing tank two and the washing tank three, thereby further improving the treatment efficiency of heavy metals and soluble salts in the fly ash.

[0023] Preferably, a connecting pipe 1 is connected between the washing tank 1 and the washing tank 2, and a connecting valve 1 is installed on the connecting pipe 1;

[0024] A connecting pipe 2 is connected between the second washing tank and the third washing tank, and a connecting valve 2 is installed on the connecting pipe 2.

[0025] Through the above technical solution, after three repeated washings, the concentration in washing tank one is higher, the concentration in washing tank two is medium, and the concentration in washing tank three is lower. At this time, if there is liquid in washing tank one that needs to be discharged, the opening and closing actions of connecting valve one and connecting valve two can be selectively controlled, and the liquid in washing tank two can supplement the discharged part of washing tank one, and the liquid in washing tank three can supplement the missing part of the liquid in washing tank two.

[0026] Preferably, the washing tank is provided with a water pipe and a reagent inlet.

[0027] Through the above technical scheme, tap water can be added into the washing tank three through the tap water pipe, and the chemical liquid can be added into the washing tank three through the chemical inlet; through the above method, the liquid volume and chemical concentration of the above three washing tanks can be relatively stable to ensure the stability of the treatment effect; in addition, the chemical will cause the heavy metals in the fly ash to generate more insoluble and more stable metal compounds that are precipitated in the fly ash.

[0028] The technical effect of the utility model is mainly reflected in: the device removes salts in fly ash through three-stage cleaning, and at the same time, the original heavy metals in the fly ash are solidified by the agent, making it difficult to dissolve in the environment, and after the salt content in the fly ash reaches the requirement, the solidified fly ash module is not easy to break, and the dioxins therein are fixed in the solidified fly ash for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an embodiment.

[0030] Figure numerals: 1, fly ash silo; 2, desalination stabilizer; 201, desalination outer frame; 3, washing tank group; 301, washing tank one; 302, washing tank two; 303, washing tank three; 4, stirring member; 5, discharge pipe; 6, first water outlet pipe; 7, first water outlet valve; 8, first water inlet pipe; 9, first water inlet valve; 10, first water inlet pump; 11, wastewater treatment pipe; 12, wastewater treatment valve; 13, balance pipe; 14, balance valve; 15, discharge valve; 16 , flexible connecting section; 17, upper pipe; 18, lower pipe; 19, upper cover; 20, second water outlet pipe; 21, second water outlet valve; 22, second water inlet pipe; 23, second water inlet valve; 24, third water outlet pipe; 25, third water outlet valve; 26, third water inlet pipe; 27, third water inlet valve; 28, connecting pipe one; 29, connecting valve one; 30, connecting pipe two; 31, connecting valve two; 32, tap water pipe; 33, medicine inlet; 34, second water inlet pump; 35, third water inlet pump. DETAILED DESCRIPTION

[0031] The specific implementation modes of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0032] A desalting and stabilizing device for fly ash from incineration of domestic waste comprises a fly ash silo 1, a desalting stabilizer 2, and a washing tank group 3. The fly ash silo 1, the desalting stabilizer 2, and the washing tank group 3 are arranged in sequence from top to bottom.

[0033] The fly ash silo 1 is used to temporarily store the monitored fly ash.

[0034] The desalination stabilizer 2 includes a desalination outer frame 201. A discharge pipe 5 is connected between the desalination outer frame 201 and the fly ash silo 1, and the fly ash in the fly ash silo 1 can enter the desalination outer frame 201 through the discharge pipe 5. In addition, a discharge valve 15 is installed on the discharge pipe 5, and the discharge valve 15 is used to control the internal on-off of the discharge pipe 5.

[0035] A stirring member 4 is installed in the desalination outer frame 201. The stirring member 4 is used to stir the fly ash in the desalination outer frame 201.

[0036] A balancing pipe 13 is connected between the desalination outer frame 201 and the fly ash silo 1 , and a balancing valve 14 is installed on the balancing pipe 13 .

[0037] The desalination outer frame 201 is hinged with an upper cover 19, and the fly ash in the desalination outer frame 201 can be discharged by opening the upper cover 19. The discharge pipe 5 and the balance pipe 13 are both installed with a flexible connecting section 16, which divides the discharge pipe 5 and the balance pipe 13 into an upper pipe 17 and a lower pipe 18, and the lower pipe 18 can swing around the upper pipe 17.

[0038] The washing tank group 3 includes a washing tank 1 301 , a washing tank 2 302 , and a washing tank 3 303 .

[0039] A first water outlet pipe 6 and a first water inlet pipe 8 are connected between the washing tank 301 and the desalination outer frame 201. The first water outlet pipe 6 is installed with a first water outlet valve 7. The first water inlet pipe 8 is installed with a first water inlet valve 9 and a first water inlet pump 10. The first water inlet pump 10 can pump the water in the washing tank 301 into the desalination outer frame 201 through the first water inlet pipe 8. The washing tank 301 is also provided with a wastewater treatment pipe 11, and a wastewater treatment valve 12 is installed on the wastewater treatment pipe 11.

[0040] A second water outlet pipe 20 and a second water inlet pipe 22 are installed on the washing tank 2 302. The second water outlet pipe 20 is connected to the first water outlet pipe 6, and a second water outlet valve 21 is installed on the second water outlet pipe 20; the second water inlet pipe 22 is connected to the first water inlet pipe 8, and a second water inlet valve 23 is installed on the second water inlet pipe 22; a second water inlet pump 34 is installed on the second water inlet pipe 22, and the second water inlet pump 34 can pump the water in the washing tank 2 302 into the desalination outer frame 201 through the second water inlet pipe 22.

[0041] The washing tank 303 is provided with a third water outlet pipe 24 and a third water inlet pipe 26. The third water outlet pipe 24 is connected to the first water outlet pipe 6. The third water outlet pipe 24 is provided with a third water outlet valve 25. The third water inlet pipe 26 is connected to the first water inlet pipe 8. The second water inlet pipe 22 is provided with a third water inlet valve 27. The third water inlet pipe 26 is provided with a third water inlet pump 35. The third water inlet pump 35 can pump the water in the washing tank 303 into the desalination outer frame 201 through the third water inlet pipe 26. The washing tank 303 is provided with a tap water pipe 32 and a reagent inlet 33.

[0042] In addition, a connecting pipe 28 is connected between the washing tank 1 301 and the washing tank 2 302, and a connecting valve 29 is installed on the connecting pipe 28. A connecting pipe 2 30 is connected between the washing tank 2 302 and the washing tank 3 303, and a connecting valve 2 31 is installed on the connecting pipe 2 30.

[0043] Actual use process of the fly ash desalination and stabilization device for domestic waste incineration:

[0044] Pour the fly ash to be treated into the fly ash silo 1, first open the balance valve 14, then open the discharge valve 15, and the fly ash in the fly ash silo 1 can fall into the desalination outer frame 201 along the discharge pipe 5;

[0045] Open the first water inlet valve 9 and the first water inlet pump 10, and the washing liquid in the washing tank 301 enters the desalination outer frame 201 through the first water inlet pipe 8, and the washing liquid and the fly ash in the desalination outer frame 201 are stirred by the stirring member 4, and then open the first water outlet valve 7, and the washing liquid containing heavy metals, soluble salts and other substances can re-enter the washing tank 301 along the first water outlet pipe 6, and the cycle is repeated to complete the first level of cleaning;

[0046] Close the first water outlet valve 7, the first water inlet valve 9, and the first water inlet pump 10, and open the second water outlet valve 21, the second water inlet valve 23, and the second water inlet pump 34, so that the washing liquid in the second washing tank 302 can enter the desalination outer frame 201 through the second water inlet pipe 22, and the washing liquid and the fly ash in the desalination outer frame 201 are stirred by the stirring member 4, and then open the second water outlet valve 21, and the washing liquid containing heavy metals, soluble salts and other substances can re-enter the second washing tank 302 along the second water outlet pipe 20, and the cycle is repeated to complete the second-level cleaning work;

[0047] The second water outlet valve 21, the second water inlet valve 23, and the second water inlet pump 34 are closed, and the third water outlet valve 25, the third water inlet valve 27, and the third water inlet pump 35 are opened, and the washing liquid in the washing tank 3 303 can enter the desalination outer frame 201 through the third water inlet pipe 26, and the washing liquid and the fly ash in the desalination outer frame 201 are stirred by the stirring member 4, and then the third water outlet valve 25 is opened, and the washing liquid dissolved with heavy metals, soluble salts and other substances can re-enter the washing tank 3 303 along the third water outlet pipe 24, and this cycle is repeated to complete the third level of cleaning;

[0048] After the above-mentioned triple washing process, the salt concentration in washing tank 1 301 is the highest, the salt concentration in washing tank 2 302 is in the middle, and the salt concentration in washing tank 3 303 is the lowest. At this time, if it is necessary to discharge the liquid in washing tank 1 301 for treatment, the washing liquids in washing tank 1 301, washing tank 2 302, and washing tank 3 303 can be interconnected by opening connecting valve 1 29 and connecting valve 2 31, and the overall concentration can be adjusted, thereby improving the reuse rate of washing water and the utilization rate of chemicals.

[0049] As for the washed and stabilized fly ash residue in the desalination outer frame 201, the fly ash residue in the desalination outer frame 201 can be poured out by opening the upper cover 19 and moving the desalination outer frame 201.

[0050] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementations. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. A desalination and stabilization device for fly ash from the incineration of domestic waste, comprising a fly ash silo (1), characterized in that: It includes a desalting stabilizer (2) and a washing tank group (3); The desalination stabilizer (2) comprises a desalination outer frame (201), a stirring member (4) is installed in the desalination outer frame (201), a discharge pipe (5) is connected between the desalination outer frame (201) and the fly ash silo (1), the fly ash in the fly ash silo (1) can enter the desalination outer frame (201) through the discharge pipe (5), and the stirring member (4) is used to stir the fly ash in the desalination outer frame (201); The washing tank group (3) comprises a washing tank 1 (301), wherein a first water outlet pipe (6) and a first water inlet pipe (8) are connected between the washing tank 1 (301) and the desalination outer frame (201), wherein the first water outlet pipe (6) is provided with a first water outlet valve (7), and the first water inlet pipe (8) is provided with a first water inlet valve (9) and a first water inlet pump (10), wherein the first water inlet pump (10) can pump water in the washing tank 1 (301) into the desalination outer frame (201) through the first water inlet pipe (8), and the washing tank 1 (301) is also provided with a wastewater treatment pipe (11), and a wastewater treatment valve (12) is installed on the wastewater treatment pipe (11); the washing tank group (3) further comprises a washing tank 2 (302) The second washing tank (302) is provided with a second water outlet pipe (20) and a second water inlet pipe (22); the second water inlet pipe (22) is provided with a second water inlet pump (34); the second water inlet pump (34) can pump the water in the second washing tank (302) into the desalination outer frame (201) through the second water inlet pipe (22); the washing tank group (3) further comprises a third washing tank (303); the third washing tank (303) is provided with a third water outlet pipe (24) and a third water inlet pipe (26); the third water inlet pipe (26) is provided with a third water inlet pump (35); the third water inlet pump (35) can pump the water in the third washing tank (303) into the desalination outer frame (201) through the third water inlet pipe (26).

2. A domestic waste incineration fly ash desalination and stabilization device according to claim 1, characterized in that: A balancing pipe (13) is connected between the desalination outer frame (201) and the fly ash silo (1), and a balancing valve (14) is installed on the balancing pipe (13).

3. A domestic waste incineration fly ash desalination and stabilization device according to claim 2, characterized in that: A discharge valve (15) is installed on the discharge pipe (5).

4. A domestic waste incineration fly ash desalination and stabilization device according to claim 3, characterized in that: The discharge pipe (5) and the balance pipe (13) are both provided with a flexible connection section (16), and the flexible connection section (16) divides the discharge pipe (5) and the balance pipe (13) into an upper pipe (17) and a lower pipe (18), and the lower pipe (18) can swing around the upper pipe (17); An upper cover (19) is hingedly connected to the desalination outer frame (201).

5. The desalination and stabilization device for fly ash from incineration of domestic waste according to claim 1 is characterized by: The second water outlet pipe (20) is connected to the first water outlet pipe (6), and a second water outlet valve (21) is installed on the second water outlet pipe (20); the second water inlet pipe (22) is connected to the first water inlet pipe (8), and a second water inlet valve (23) is installed on the second water inlet pipe (22).

6. A domestic waste incineration fly ash desalination and stabilization device according to claim 5, characterized in that: The third water outlet pipe (24) is connected to the first water outlet pipe (6), and a third water outlet valve (25) is installed on the third water outlet pipe (24); the third water inlet pipe (26) is connected to the first water inlet pipe (8), and a third water inlet valve (27) is installed on the second water inlet pipe (22).

7. A domestic waste incineration fly ash desalination and stabilization device according to claim 6, characterized in that: A connecting pipe 1 (28) is connected between the washing tank 1 (301) and the washing tank 2 (302), and a connecting valve 1 (29) is installed on the connecting pipe 1 (28); A connecting pipe 2 (30) is connected between the second washing tank (302) and the third washing tank (303), and a connecting valve 2 (31) is installed on the connecting pipe 2 (30).

8. The device for desalting and stabilizing fly ash from incineration of domestic waste according to claim 7, characterized in that: The washing tank three (303) is provided with a tap water pipe (32) and a reagent inlet (33).

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