Energy-saving and efficient washing fly ash and mortar vortex separation device

Abstract

The utility model relates to the field of washing dechlorination of fly ash, and discloses an energy-saving and efficient washing fly ash and mortar vortex separation device which comprises a washing liquid storage tank and a concentrated mortar storage tank, a plurality of vortex separators are fixedly connected to the periphery of the washing liquid storage tank, an ash discharge pipe is fixedly connected to the middle of the washing liquid storage tank and the middle of the concentrated mortar storage tank, and the ash discharge pipe is fixedly connected to the periphery of the concentrated mortar storage tank. The top of the washing liquid storage tank is fixedly connected with a waste gas exhaust port and an inspection manhole, the upper portion of the right side of the washing liquid storage tank is fixedly connected with a washing liquid exhaust port, the right end of the washing liquid exhaust port is fixedly connected with a washing liquid exhaust pipe, and the bottom of the washing liquid storage tank is fixedly connected with an ash outlet. According to the fly ash and mortar separation device, continuous operation of the fly ash and mortar separation process is achieved through the characteristic that fly ash is easy to settle and the principle of vortex three-phase separation, the mortar solid-liquid separation efficiency is greatly improved, and then the efficiency of the whole fly ash washing system can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of water-washing and dechlorination of fly ash, in particular to an energy-saving and efficient water-washing fly ash slurry eddy current separation device. Background Art

[0002] Fly ash is classified as hazardous waste with the code HW18 because it contains heavy metals, benzene, dioxins and other harmful substances. As stipulated in the "Technical Specifications for Pollution Control of Fly Ash from Incineration of Municipal Waste (Trial)" (HJ 1134-2020), "the soluble chlorine content in the fly ash treatment product should be controlled, and the soluble chlorine can be removed by high temperature process, water washing process, etc. The soluble chlorine content in the treatment product (high temperature treatment product, fly ash after water washing, etc.) should not exceed 2%", preferably not more than 1%. Therefore, fly ash water washing pretreatment is currently a more mainstream method for effectively removing chloride ions from fly ash.

[0003] Chinese patent announcement number: CN117531810A discloses a system for washing fly ash in countercurrent to increase the salt concentration of the washing liquid, which requires three-stage washing and two-stage plate-frame filter press, and effectively reduces the solid-liquid ratio of the washing system through three-stage washing tank and carbon dioxide auxiliary equipment. Announcement number: CN217912142U discloses a waste incineration fly ash washing system, which uses a four-stage washing bucket, 4 horizontal screw centrifuges and 2 plate-frame filter presses for fly ash washing. By adding a separate heavy metal elution unit, most of the heavy metals in the fly ash are washed away, overcoming the problem that soluble chlorine and soluble heavy metals cannot stably meet the standards. Announcement number: CN117798179A discloses a resource utilization method for fly ash from domestic waste incineration, which uses three-stage countercurrent washing and three solid-liquid separations. The moisture content of the filter cake obtained after each stage of separation is 40%. By using ultrasonic enhanced washing means, the purpose of quickly eluting chloride ions with reduced water consumption is achieved.

[0004] It can be seen that although the existing fly ash washing patents have certain differences in process and innovation, they basically adopt high-power solid-liquid separation equipment including centrifuges and filter presses, which not only have high operating energy consumption, but can only be operated in batch mode. Moreover, due to the limitations of the dehydration principles of centrifuges and filter presses, the moisture content of the dehydrated fly ash is usually 40% or less, and it is in the form of cakes or blocks. When it is washed in the next stage, it needs to be broken and pulped again, which not only causes a large waste of energy and labor, but also leads to a series of problems such as too many equipment in the washing system, complicated operation, and frequent replacement of accessories. Therefore, an energy-saving and efficient eddy current separation device for washing fly ash slurry is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an energy-saving and efficient water-washed fly ash slurry eddy current separation device, which aims to improve the problem of low efficiency of fly ash water washing system in the prior art.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] An energy-saving and efficient vortex separation device for washing fly ash mortar, comprising a washing liquid storage tank and a concentrated mortar storage tank. A plurality of vortex separators are fixedly connected to the outer periphery of the washing liquid storage tank. A dust discharge pipe is fixedly connected to the middle of the washing liquid storage tank and the concentrated mortar storage tank. An exhaust gas outlet and a maintenance manhole are respectively fixedly connected to the top of the washing liquid storage tank. A washing liquid discharge port is fixedly connected to the upper part of the washing liquid storage tank. A washing liquid discharge pipe is fixedly connected to the upper part of the washing liquid discharge port. An ash discharge port is fixedly connected to the bottom of the washing liquid storage tank, and the bottom of the ash discharge port is fixedly connected to the top of the dust discharge pipe;

[0008] As a further description of the above technical solution:

[0009] A mortar discharge port is fixedly connected to the bottom of the concentrated mortar storage tank, and a mortar discharge pipe is fixedly connected to the bottom of the mortar discharge port;

[0010] As a further description of the above technical solution:

[0011] A washing fly ash mortar access pipe is fixedly connected to the top of one side of the vortex separator. A plurality of uniformly distributed connecting ducts are fixedly connected to the top of the vortex separator, and one ends of the plurality of connecting ducts are respectively fixedly connected to the outer periphery of the washing liquid storage tank;

[0012] As a further description of the above technical solution:

[0013] The centripetal ends of the washing fly ash mortar access pipes of the plurality of vortex separators are fixedly connected to an annular access main pipe, and a solenoid valve three and a variable-frequency slurry pump are respectively fixedly connected to the outer periphery of one end of the annular access main pipe;

[0014] As a further description of the above technical solution:

[0015] A solenoid valve one is fixedly connected to the middle of the dust discharge pipe, and the bottom of the dust discharge pipe is fixedly connected to the top of the concentrated mortar storage tank;

[0016] As a further description of the above technical solution:

[0017] An inverted conical pipe for downward flowing mortar is fixedly connected to the bottom of the vortex separator, and the bottom of the inverted conical pipe is connected to the top of the concentrated mortar storage tank;

[0018] As a further description of the above technical solution:

[0019] The bottoms of the plurality of vortex separators are all fixedly connected to the top of the concentrated mortar storage tank;

[0020] As a further description of the above technical solution:

[0021] An electromagnetic valve II is fixedly connected to the outer periphery of the mortar discharge pipe.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, by utilizing the characteristic that fly ash is easy to settle itself and through the principle of eddy current three-phase separation, the continuous operation of the fly ash mortar separation process is realized, the efficiency of mortar solid-liquid separation is greatly improved, and further the efficiency of the entire fly ash washing system can be greatly improved.

[0024] 2. In the utility model, by optimizing the moisture content parameter of the solid phase end of fly ash mortar separation, the unnecessary excessive dehydration link in the conventional fly ash washing mud-water separation is avoided, and further the energy waste caused by repeated dehydration and repeated pulping of fly ash is avoided, and the energy consumption is greatly saved.

[0025] 3. In the utility model, it can replace some traditional solid-liquid separation equipment in the multi-stage washing process. Under the condition of ensuring the same elution efficiency, the overall volume of the equipment is significantly reduced, and the automation degree of the equipment is greatly improved. While being energy-efficient and environmentally friendly, a series of problems such as too many equipment, complex operation, and frequent replacement of accessories in the washing process are solved at the same time. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the washing liquid storage tank of an energy-saving and efficient eddy current separation device for washing fly ash mortar proposed by the utility model;

[0027] Figure 2 It is a schematic structural diagram of the eddy current separator of an energy-saving and efficient eddy current separation device for washing fly ash mortar proposed by the utility model.

[0028] Legend Explanation:

[0029] 1. Washing liquid storage tank; 2. Concentrated mortar storage tank; 3. Eddy current separator; 3-1. Washing mortar access pipe; 3-2. Connecting conduit; 3-3. Inverted conical pipe; 3-4. Annular access main pipe; 3-5. Electromagnetic valve III; 3-6. Variable frequency slurry pump; 4. Ash discharge pipe; 5. Exhaust gas outlet; 6. Maintenance manhole; 7. Washing liquid discharge port; 8. Washing liquid discharge pipe; 9. Ash outlet; 10. Electromagnetic valve I; 11. Mortar discharge port; 12. Mortar discharge pipe; 13. Electromagnetic valve II. Specific Embodiments

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Referring to Figure 1 - Figure 2 , an embodiment provided by the present invention: an energy-saving and efficient eddy current separation device for washed fly ash slurry, including a washing liquid storage tank 1 and a concentrated ash slurry storage tank 2. The washing liquid storage tank 1 and the concentrated ash slurry storage tank 2 are respectively used to store washing liquid and concentrated ash slurry. A plurality of eddy current separators 3 are fixedly connected to the outer periphery of the washing liquid storage tank 1. A dust discharge pipe 4 is fixedly connected to the middle of the washing liquid storage tank 1 and the concentrated ash slurry storage tank 2. The dust discharge pipe 4 is used to discharge the ash gas generated during separation. An exhaust gas outlet 5 and a maintenance manhole 6 are respectively fixedly connected to the top of the washing liquid storage tank 1. The exhaust gas outlet 5 is used to discharge exhaust gas. A washing liquid discharge port 7 is fixedly connected to the upper part of the washing liquid storage tank 1. A washing liquid discharge pipe 8 is fixedly connected to the upper part of the washing liquid discharge port 7. An ash discharge port 9 is fixedly connected to the bottom of the washing liquid storage tank 1. The bottom of the ash discharge port 9 is fixedly connected to the top of the dust discharge pipe 4. A slurry discharge port 11 is fixedly connected to the bottom of the concentrated ash slurry storage tank 2. A slurry discharge pipe 12 is fixedly connected to the bottom of the slurry discharge port 11. A washed ash slurry access pipe 3-1 is fixedly connected to the top of one side of the eddy current separator 3. A plurality of uniformly distributed connecting conduits 3-2 are fixedly connected to the top of the eddy current separator 3. One ends of the plurality of connecting conduits 3-2 are respectively fixedly connected to the outer periphery of the washing liquid storage tank 1.

[0032] Referring to Figure 1 - Figure 2 , a circular access main pipe 3-4 is fixedly connected to the centripetal ends of the washed ash slurry access pipes 3-1 of the plurality of eddy current separators 3. A solenoid valve three C3-5 and a variable-frequency slurry pump C3-6 are respectively fixedly connected to the outer periphery of one end of the circular access main pipe 3-4. The solenoid valve three C305 is used to control the flow rate of the ash slurry flowing inside the circular access main pipe. A solenoid valve one 10 is fixedly connected to the outer periphery of the dust discharge pipe 4. The solenoid valve one 10 is used to control the ash discharge speed of the dust discharge pipe 4. The bottom of the dust discharge pipe 4 is fixedly connected to the top of the concentrated ash slurry storage tank 2. An inverted conical pipe 3-3 for downward ash slurry is fixedly connected to the bottom of the eddy current separator 3. The bottom of the inverted conical pipe 3-3 is connected to the top of the concentrated ash slurry storage tank 2. The bottoms of the plurality of eddy current separators 3 are all fixedly connected to the top of the concentrated ash slurry storage tank 2. A solenoid valve two 13 is fixedly connected to the outer periphery of the slurry discharge pipe 12.

[0033] Working principle: First, the fly ash mortar is introduced into the eddy current separator 3 through the water-washed mortar access pipe 3-1. The design of the eddy current separator utilizes the principle of fluid mechanics. By forming a high-speed rotating eddy current in the washing liquid storage tank 1, the fly ash particles are pushed to the periphery of the separator under the action of centrifugal force, while the lighter liquid remains in the central area. At the top of the eddy current separator, the connecting conduit 3-2 transports the washing liquid from the washing liquid storage tank 1 into the separator to ensure full mixing of the washing liquid and the fly ash mortar, so as to improve the separation efficiency.

[0034] At the same time, the water-washed mortar access pipes of multiple eddy current separators are centralized through the annular access main pipe 3-4 and precisely controlled by the solenoid valve three C3-5 and the variable-frequency slurry pump C3-6 to adjust the flow rate and pressure of the mortar, ensuring the continuity and stability of the separation process. During the separation process, the fly ash particles gradually deposit at the bottom of the eddy current separator and enter the concentrated mortar storage tank 2 through the inverted conical pipe 3-3. The solenoid valve one 10 fixed in the middle of the ash discharge pipe 4 is used to control the ash discharge speed to ensure the smooth discharge of the mortar.

[0035] The ash outlet 9 at the bottom of the washing liquid storage tank 1 is connected to the top of the ash discharge pipe 4 to further promote the separation and discharge of the mortar. The exhaust gas outlet 5 and the maintenance manhole 6 at the top of the washing liquid storage tank 1 are used to discharge exhaust gas and facilitate the maintenance and repair of the equipment respectively. The washing liquid outlet 7 and the washing liquid discharge pipe 8 are used to discharge the treated washing liquid. The solenoid valve two 13 is fixedly connected to the outer periphery of the mortar discharge pipe 12 to control the discharge of the mortar.

[0036] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-saving and efficient water-washed fly ash slurry eddy current separation device, comprising a washing liquid storage tank (1) and a concentrated slurry storage tank (2), characterized in that: A plurality of eddy current separators (3) are fixedly connected to the periphery of the washing liquid storage tank (1); an ash discharge pipe (4) is fixedly connected between the washing liquid storage tank (1) and the middle of the concentrated slurry storage tank (2); a waste gas discharge port (5) and a maintenance manhole (6) are fixedly connected to the top of the washing liquid storage tank (1); a washing liquid discharge port (7) is fixedly connected to the upper part of the washing liquid storage tank (1); a washing liquid discharge pipe (8) is fixedly connected to the upper part of the washing liquid discharge port (7); an ash outlet (9) is fixedly connected to the bottom of the washing liquid storage tank (1); and the bottom of the ash outlet (9) is fixedly connected to the top of the ash discharge pipe (4).

2. The energy-saving and efficient water-washed fly ash slurry eddy current separation device according to claim 1 is characterized by: The bottom of the concentrated mortar storage tank (2) is fixedly connected to a mortar discharge port (11), and the bottom of the mortar discharge port (11) is fixedly connected to a mortar discharge pipe (12).

3. The energy-saving and efficient water-washed fly ash slurry eddy current separation device according to claim 1 is characterized by: A water-washed slurry access pipe (3-1) is fixedly connected to the top of one side of the eddy current separator (3), and a plurality of evenly distributed connecting conduits (3-2) are fixedly connected to the top of the eddy current separator (3), and one end of the plurality of connecting conduits (3-2) is respectively fixedly connected to the outer periphery of the washing liquid storage tank (1).

4. The energy-saving and efficient water-washed fly ash slurry eddy current separation device according to claim 1 is characterized by: A plurality of eddy current separators (3) have a water-washed slurry access pipe (3-1) fixedly connected at one centripetal end thereof to an annular access main pipe (3-4), and an end of the annular access main pipe (3-4) is fixedly connected at its outer periphery to a solenoid valve 3 (C3-5) and a variable frequency slurry pump (C3-6).

5. The energy-saving and efficient water-washed fly ash slurry eddy current separation device according to claim 1 is characterized by: A solenoid valve (10) is fixedly connected to the middle of the ash discharge pipe (4), and the bottom of the ash discharge pipe (4) is fixedly connected to the top of the concentrated slurry storage tank (2).

6. The energy-saving and efficient water-washed fly ash slurry eddy current separation device according to claim 1 is characterized by: The bottom of the eddy current separator (3) is fixedly connected to an inverted cone pipe (3-3) for descending slurry, and the bottom of the inverted cone pipe (3-3) is connected to the top of the concentrated slurry storage tank (2).

7. The energy-saving and efficient water-washed fly ash slurry eddy current separation device according to claim 1 is characterized by: The bottoms of the plurality of eddy current separators (3) are fixedly connected to the top of the concentrated slurry storage tank (2).

8. The energy-saving and efficient water-washed fly ash slurry eddy current separation device according to claim 2 is characterized by: A second solenoid valve (13) is fixedly connected to the outer periphery of the slurry discharge pipe (12).

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