Boiler slag water recovery system

Abstract

The utility model relates to the technical field of boiler slag removal, and discloses a boiler slag water recovery system which comprises a boiler, a slag conveyor, an overflow water tank, a thickener, a water return tank, a first communicating pipeline, a second communicating pipeline, a third communicating pipeline, a slag slurry discharge pipeline, a water return pipeline and an acid wastewater pipeline. The first communicating pipeline is communicated with the slag conveyor and the overflow water tank, the second communicating pipeline is communicated with the overflow water tank and a water inlet of the thickener, an overflow water pump is arranged on the second communicating pipeline, and the third communicating pipeline is communicated with a water outlet of the thickener and the water return tank. The slag slurry discharge pipeline is communicated with a slag outlet of the thickener and a slag outlet end of the slag conveyor, a slag slurry pump is arranged on the slag slurry discharge pipeline, and the water return pipeline is communicated with the water return pool and the slag conveyor. The acid wastewater pipeline is communicated with a water inlet of the thickener, the acid wastewater pipeline is used for supplying acid wastewater to the water inlet of the thickener, and a first control valve is arranged on the acid wastewater pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler slag removal, in particular to a boiler slag water recovery system. Background Art

[0002] At present, for the existing boiler slag water recovery system, the overflow water of the boiler slag hopper is collected into a thickener. After being treated by the thickener, the water that can be reused generated by the thickener is sent back to the slag scraper for reuse, and the thickened slag slurry is discharged. However, since the overflow water of the slag hopper is the wastewater generated after the boiler slag is washed, it not only has a high slag content, but also has extremely high salt content, and the pH value of the slag water is above 11, often causing salt deposition inside the pipeline of the boiler slag water wastewater recovery system, resulting in blockage.

[0003] Therefore, there is an urgent need for a boiler slag water recovery system to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a boiler slag water recovery system to avoid blockage of the system pipeline due to excessive salt content in the boiler slag water resulting in internal salt deposition.

[0005] To achieve the above purpose, the utility model provides a boiler slag water recovery system, which is characterized by comprising a boiler, a slag scraper, an overflow water tank, a thickener, a return water tank, a first connecting pipeline, a second connecting pipeline, a third connecting pipeline, a slag slurry discharge pipeline, a return water pipeline and an acidic wastewater pipeline. The slag scraper is arranged below the furnace chamber of the boiler;

[0006] The first connecting pipeline connects the slag scraper and the overflow water tank. The second connecting pipeline connects the overflow water tank and the water inlet of the thickener. An overflow water pump is arranged on the second connecting pipeline, and the overflow water pump is used to pump the water in the overflow water tank to the thickener. The third connecting pipeline connects the water outlet of the thickener and the return water tank;

[0007] The slag slurry discharge pipeline connects the slag outlet of the thickener and the slag discharge end of the slag scraper. A slag slurry pump is arranged on the slag slurry discharge pipeline, and the slag slurry pump is used to pump the slag slurry of the thickener to the slag discharge end of the slag scraper. The return water pipeline connects the return water tank and the slag scraper. A return water pump is arranged on the return water pipeline, and the return water pump is used to pump the water in the return water tank to the slag scraper;

[0008] The acidic wastewater pipeline is connected to the water inlet of the thickener, and the acidic wastewater pipeline is used to supply acidic wastewater to the thickener. A first control valve is arranged on the acidic wastewater pipeline.

[0009] As an improvement to the above technical solution, the slag scraper includes a water tank and a slag scraping mechanism. Cooling water is provided in the water tank. The bottom end of the slag scraping mechanism is arranged in the water tank, and the top end extends towards the top of the water tank.

[0010] As an improvement to the above technical solution, one end of the acidic wastewater pipeline away from the thickener is communicated with the main pipeline of the cation bed regeneration wastewater.

[0011] As an improvement to the above technical solution, it further includes a flushing pipeline. The flushing pipeline communicates the return water tank with the slag slurry discharge pipeline. A pipeline pump is arranged on the flushing pipeline, and the pipeline pump is used to pump the water in the return water tank to the slag slurry discharge pipeline.

[0012] As an improvement to the above technical solution, multiple return water pumps, slag slurry pumps and overflow water pumps are provided.

[0013] As an improvement to the above technical solution, the first control valve is a solenoid valve.

[0014] As an improvement to the above technical solution, it further includes a first flowmeter and a second flowmeter. The first flowmeter is arranged on the second communication pipeline, and the second flowmeter is arranged on the acidic wastewater pipeline.

[0015] As an improvement to the above technical solution, it further includes a first pH meter and a second pH meter. The first pH meter is arranged in the overflow water tank for monitoring the pH value in the overflow water tank, and the second pH meter is arranged on the acidic wastewater pipeline for monitoring the pH value in the acidic wastewater pipeline.

[0016] As an improvement to the above technical solution, it further includes a third pH meter. The third pH meter is arranged in the thickener for monitoring the pH value in the thickener.

[0017] As an improvement to the above technical solution, it further includes a controller. The first flowmeter, the second flowmeter, the first pH meter, the second pH meter, the third pH meter and the first control valve are all electrically connected to the controller.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] The boiler slag water recovery system of the present utility model collects the slag water overflowed from the slag scraper by an overflow water tank, and sends the slag water collected by the overflow water pump to a thickener for concentration through the overflow water pump. The reusable water generated by the concentration flows to a return water tank through a third connecting pipeline, and is re-sent to the slag scraper for reuse through a return water pump as needed. The slag slurry generated by the concentration of the thickener is sent to the slag discharge end of the slag scraper through a slag slurry pump through a slag slurry discharge pipe, so that the slag slurry is discharged together with the boiler slag fished out by the slag scraper. Moreover, in this embodiment, an acidic waste water pipeline is also provided, and acidic waste water is supplied to the thickener through the acidic waste water pipeline, and the boiler slag water is neutralized by the acidic waste water to reduce the pH value of the boiler slag water, thereby avoiding blockage of the return water pipeline and the slag slurry discharge pipe due to internal salt formation caused by excessive salt content in the boiler slag water. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the boiler slag water recovery system provided by an embodiment of the present utility model.

[0021] In the figure:

[0022] 11. Boiler; 12. Slag scraper; 13. Overflow water tank; 14. Thickener; 15. Return water tank; 16. First connecting pipeline; 17. Second connecting pipeline; 171. Overflow water pump; 18. Third connecting pipeline; 19. Slag slurry discharge pipeline; 191. Slag slurry pump; 192. Second control valve; 20. Return water pipeline; 201. Return water pump; 21. Acidic waste water pipeline; 211. First control valve; 22. Flushing pipeline; 221. Pipeline pump;

[0023] 100. Cation bed regeneration waste water main pipe; 200. Neutralization tank; 300. Anion bed regeneration waste water main pipe; 400. Neutralized water outlet pipe. Detailed Embodiment

[0024] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0025] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] In the present utility model, unless otherwise clearly stipulated and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may also include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0027] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] Such as Figure 1As shown in the figure, this embodiment provides a boiler slag water recovery system, which includes a boiler 11, a slag scraper 12, an overflow water tank 13, a thickener 14, a return water tank 15, a first connecting pipeline 16, a second connecting pipeline 17, a third connecting pipeline 18, a slurry discharge pipeline 19, a return water pipeline 20, and an acidic wastewater pipeline 21. The slag scraper 12 is arranged below the furnace of the boiler 11. The first connecting pipeline 16 connects the slag scraper 12 and the overflow water tank 13. The second connecting pipeline 17 connects the overflow water tank 13 and the water inlet of the thickener 14. An overflow water pump 171 is arranged on the second connecting pipeline 17, and the overflow water pump 171 is used to pump the water in the overflow water tank 13 to the thickener 14. The third connecting pipeline 18 connects the water outlet of the thickener 14 and the return water tank 15. The slurry discharge pipeline 19 connects the slag outlet of the thickener 14 and the slag discharge end of the slag scraper 12. A slurry pump 191 is arranged on the slurry discharge pipeline 19, and the slurry pump 191 is used to pump the slurry of the thickener 14 to the slag discharge end of the slag scraper 12. A second control valve 192 is arranged on the slurry discharge pipeline 19. The return water pipeline 20 connects the return water tank 15 and the slag scraper 12. A return water pump 201 is arranged on the return water pipeline 20, and the return water pump 201 is used to pump the water in the return water tank 15 to the slag scraper 12. The acidic wastewater pipeline 21 is connected to the water inlet of the thickener 14, and the acidic wastewater pipeline 21 is used to supply acidic wastewater to the water inlet of the thickener 14. A first control valve 211 is arranged on the acidic wastewater pipeline 21. In this embodiment, one end of the acidic wastewater pipeline 21 far from the thickener 14 is connected to the cation bed regeneration wastewater main pipe 100. The cation bed regeneration wastewater main pipe 100 is a pipeline for the acidic wastewater generated by the cation bed regeneration to flow to the neutralization tank 200. The acidic wastewater pipeline 21 is connected to the cation bed regeneration wastewater main pipe 100, and part of the acidic wastewater generated by the cation bed regeneration in the cation bed regeneration wastewater main pipe 100 is introduced into the thickener 14.

[0029] The boiler slag water recovery system provided in this embodiment collects the slag water overflowed from the slag scraper 12 through the overflow water tank 13, and sends the slag water collected by the overflow water tank 13 into the thickener 14 for concentration through the overflow water pump 171. The reusable water generated by the concentration flows to the return water tank 15 through the third connecting pipeline 18, and is re-sent to the slag scraper 12 for reuse through the return water pump 201 as needed. The slurry generated by the concentration of the thickener 14 is sent to the slag discharge end of the slag scraper 12 through the slurry pump 191 via the slurry discharge pipeline 19, so that the slurry is discharged together with the furnace slag of the boiler 11 fished out by the slag scraper 12. Moreover, this embodiment also sets an acidic wastewater pipeline 21 to supply acidic wastewater to the thickener 14 through the acidic wastewater pipeline 21, and neutralize the slag water of the boiler 11 with the acidic wastewater to reduce the pH value of the slag water of the boiler 11, thereby avoiding blockage of the return water pipeline 20 and the slurry discharge pipeline 19 due to internal salt deposition caused by excessive salt content in the slag water of the boiler 11.

[0030] As Figure 1As shown, in addition to being connected to the cation bed regeneration waste water main pipe 100, the neutralization tank 200 is also connected to the anion bed regeneration waste water main pipe 300 and the neutralized water outlet pipe 400. The anion bed regeneration waste water main pipe 300 is a pipeline for the alkaline waste water generated during the regeneration of the anion bed to flow into the neutralization tank 200, and the neutralized water outlet pipe 400 is a pipeline for the neutralized waste water to flow into the water purification plant.

[0031] Optionally, the slag scraper 12 includes a water tank and a slag scraping mechanism. Cooling water is provided in the water tank. The bottom end of the slag scraping mechanism is arranged in the water tank, and the top end extends towards the top of the water tank. The slag generated by the boiler 11 is cooled by the cooling water in the water tank, and the cooled slag in the water tank is collected and discharged by the slag scraping mechanism. The concentrated slurry generated by the thickener 14 is discharged through the slurry discharge pipeline 19 to the slag discharge end of the slag scraping mechanism and discharged by the slag scraping mechanism. The specific structure of the slag scraping mechanism is common knowledge in the art and will not be elaborated here.

[0032] Optionally, as Figure 1 shown, the boiler slag water recovery system provided in this embodiment further includes a flushing pipeline 22. The flushing pipeline 22 communicates the return water tank 15 with the slurry discharge pipeline 19. A pipeline pump 221 is arranged on the flushing pipeline 22. The pipeline pump 221 is used to pump the water in the return water tank 15 towards the slurry discharge pipeline 19. Since the slurry discharged by the slurry discharge pipeline 19 is of a relatively high consistency, the flushing pipeline 22 and the pipeline pump 221 are provided. When needed, the relatively clean recycled water in the return water tank 15 can be used to flush the slurry discharge pipeline 19 through the pipeline pump 221 and the flushing pipeline 22 to prevent the slurry discharge pipeline 19 from being blocked. Optionally, third control valves are arranged both upstream and downstream of the pipeline pump 221.

[0033] Furthermore, as Figure 1 shown, a plurality of return water pumps 201, slurry pumps 191 and overflow water pumps 171 are provided, so that when a pump fails in a certain station, the station can still operate, improving the operation stability of the system.

[0034] Optionally, as Figure 1 shown, the first control valve 211 is an electromagnetic valve. It is convenient to control the on-off of the acidic waste water pipeline 21, thereby facilitating the control of the supply amount of acidic waste water to the thickener 14.

[0035] Furthermore, the boiler slag water recovery system provided in this embodiment further includes a first flow meter and a second flow meter. The first flow meter is arranged on the second communication pipeline 17, and the second flow meter is arranged on the acidic waste water pipeline 21. By arranging the first flow meter and the second flow meter, it is convenient to monitor the amount of slag water and acidic waste water entering the thickener 14.

[0036] Further, the boiler slag water recovery system provided in this embodiment further includes a first pH meter and a second pH meter. The first pH meter is disposed in the overflow water tank 13 for monitoring the pH value in the overflow water tank 13, and the second pH meter is disposed on the acidic waste water pipeline 21 for monitoring the pH value in the acidic waste water pipeline 21. By monitoring the pH value of the slag water in the overflow water tank 13 with the first pH meter and monitoring the pH value of the acidic waste water with the second pH meter, it is convenient to control the amount of acidic waste water entering the thickener 14 and ensure the neutralization effect.

[0037] Further, the boiler slag water recovery system provided in this embodiment further includes a third pH meter. The third pH meter is disposed in the thickener 14 for monitoring the pH value in the thickener 14. By providing the third pH meter to monitor the pH value of the water in the thickener 14, the neutralization effect can be inspected.

[0038] Further, the boiler slag water recovery system provided in this embodiment further includes a controller. The first flow meter, the second flow meter, the first pH meter, the second pH meter, the third pH meter, and the first control valve 211 are all electrically connected to the controller. By monitoring the pH value of the slag water in the overflow water tank 13 with the first pH meter and monitoring the pH value of the acidic waste water with the second pH meter, the controller can then control the amount of acidic waste water entering the thickener 14 according to the amount of slag water flowing from the overflow water tank 13 into the thickener 14 monitored by the first flow meter, the pH value of the slag water, and the pH value of the acidic waste water, and inspect the neutralization effect through the measurement result of the third pH meter to ensure the neutralization effect on the slag water.

[0039] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A boiler slag water recovery system, characterized in that: The invention comprises a boiler (11), a slag scoop machine (12), an overflow pool (13), a concentrator (14), a return pool (15), a first connecting pipeline (16), a second connecting pipeline (17), a third connecting pipeline (18), a slag slurry discharge pipeline (19), a return pipeline (20) and an acid wastewater pipeline (21), wherein the slag scoop machine (12) is arranged below the furnace of the boiler (11); The first connecting pipe (16) connects the slag scooper (12) with the overflow pool (13); the second connecting pipe (17) connects the overflow pool (13) with the water inlet of the thickener (14); an overflow water pump (171) is provided on the second connecting pipe (17); the overflow water pump (171) is used to pump water in the overflow pool (13) to the thickener (14); the third connecting pipe (18) connects the water outlet of the thickener (14) with the return water pool (15); The slurry discharge pipeline (19) is connected to the slag outlet of the thickener (14) and the slag outlet end of the slag scoop (12); a slurry pump (191) is provided on the slurry discharge pipeline (19); the slurry pump (191) is used to pump the slurry of the thickener (14) to the slag outlet end of the slag scoop (12); the return water pipeline (20) is connected to the return water tank (15) and the slag scoop (12); a return water pump (201) is provided on the return water pipeline (20); the return water pump (201) is used to pump water in the return water tank (15) to the slag scoop (12); The acidic wastewater pipeline (21) is in communication with the water inlet of the concentrator (14); the acidic wastewater pipeline (21) is used to supply acidic wastewater to the concentrator (14); and a first control valve (211) is provided on the acidic wastewater pipeline (21).

2. The boiler slag water recovery system according to claim 1, characterized in that: The slag scooping machine (12) comprises a water tank and a slag scooping mechanism. Cooling water is arranged in the water tank. The bottom end of the slag scooping mechanism is arranged in the water tank, and the top end extends to the top of the water tank.

3. The boiler slag water recovery system according to claim 1, characterized in that: One end of the acidic wastewater pipeline (21) away from the concentrator (14) is connected to the cation bed regeneration wastewater main pipe (100).

4. The boiler slag water recovery system according to claim 1, characterized in that: It also comprises a flushing pipeline (22), wherein the flushing pipeline (22) connects the return water tank (15) and the slurry discharge pipeline (19), and a pipeline pump (221) is arranged on the flushing pipeline (22), and the pipeline pump (221) is used to pump water in the return water tank (15) to the slurry discharge pipeline (19).

5. The boiler slag water recovery system according to claim 1, characterized in that: The return water pump (201), the slurry pump (191) and the overflow water pump (171) are each provided in plurality.

6. The boiler slag water recovery system according to claim 1, characterized in that: The first control valve (211) is a solenoid valve.

7. The boiler slag water recovery system according to claim 6, characterized in that: It also comprises a first flow meter and a second flow meter, wherein the first flow meter is arranged on the second connecting pipeline (17), and the second flow meter is arranged on the acid wastewater pipeline (21).

8. The boiler slag water recovery system according to claim 7, characterized in that: It also comprises a first pH value measuring instrument and a second pH value measuring instrument, wherein the first pH value measuring instrument is arranged in the overflow pool (13) and is used to monitor the pH value in the overflow pool (13), and the second pH value measuring instrument is arranged on the acid wastewater pipeline (21) and is used to monitor the pH value in the acid wastewater pipeline (21).

9. The boiler slag water recovery system according to claim 8, characterized in that: It also includes a third pH value measuring instrument, which is arranged in the concentrator (14) and is used to monitor the pH value in the concentrator (14).

10. The boiler slag water recovery system according to claim 9, characterized in that: It also includes a controller, and the first flow meter, the second flow meter, the first pH value measuring instrument, the second pH value measuring instrument, the third pH value measuring instrument and the first control valve (211) are all electrically connected to the controller.

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