Digestion device for leachate concentrated water

Abstract

The utility model discloses a percolate concentrated water consumption device which comprises percolate treatment equipment and concentrated water conveying equipment, one end of the concentrated water conveying equipment is communicated with the percolate treatment equipment, the other end of the concentrated water conveying equipment is communicated with vertical mill equipment, and a spraying water source is provided for the vertical mill equipment; the concentrated water conveying equipment comprises a conveying pipeline, a conveying pump and a water spraying access port, one end of the conveying pipeline is connected with the leachate treatment equipment, the other end of the conveying pipeline is communicated with the vertical mill equipment through the water spraying access port, and the conveying pump is arranged on the conveying pipeline and used for controlling the flow of concentrated water in the conveying pipeline. According to the digestion device for the leachate concentrated water, the concentrated water is conveyed to the vertical mill equipment for use, so that the concentrated water is prevented from being treated by an evaporative crystallization method.

Description

Technical Field

[0001] The utility model relates to the field of domestic garbage leachate treatment, in particular to a device for absorbing concentrated water of the leachate. Background Art

[0002] Domestic waste leachate refers to the liquid produced by waste in landfills or during storage due to factors such as rainfall, internal moisture release, and bacterial degradation. Leachate typically contains high concentrations of organic matter, ammonia nitrogen, heavy metals, and pathogenic microorganisms. Improper treatment can have serious impacts on the environment and human health. Therefore, leachate treatment is a critical step in the waste management process.

[0003] Domestic waste leachate treatment typically involves sedimentation and filtration to separate the primary clean water into concentrated water. The separated concentrated water is then further treated via evaporation and crystallization. However, this process consumes significant amounts of heat. Evaporation and crystallization require heating the concentrated water to boiling and then continuing to heat it until all the water evaporates.

[0004] If the leachate treatment station processes 60m3 of domestic waste leachate per day 3 , separation produces 48m3 of clean water 3 and concentrated liquid water 12m 3 . Then 12m is processed every day 3 The energy required is approximately:

[0005] Heat of boiling water: Q1 = C × M × ΔT = 4.2 × (100-20) × 12 × 1000 = 4032000 kJ

[0006] Heat of water vaporization: Q2 = 2260 × 12 × 1000 = 27120000 kJ

[0007] Q1+Q2=31152000kJ.

[0008] Therefore, evaporative crystallization is used to process 12m3 of 3 The energy required is approximately 31152000kJ. Utility Model Content

[0009] The utility model aims to provide a device for treating concentrated water of leachate, which can transport the concentrated water to a vertical mill for use, thereby avoiding the use of an evaporation and crystallization method to treat the concentrated water.

[0010] In order to achieve the above-mentioned object, the utility model provides a device for absorbing concentrated leachate water, the device comprising a leachate treatment device and a concentrated water conveying device connected to the leachate treatment device at one end, the other end of the concentrated water conveying device being connected to a vertical mill, and the concentrated water conveying device providing a spray water source to the vertical mill;

[0011] The concentrated water conveying equipment includes a conveying pipeline, a conveying pump and a water spray inlet. One end of the conveying pipeline is connected to the leachate treatment equipment, and the other end is connected to the vertical mill equipment through the water spray inlet. The conveying pump is arranged on the conveying pipeline to control the flow rate of concentrated water in the conveying pipeline.

[0012] Preferably, the concentrated water delivery equipment further includes an online flow meter, which monitors the flow rate of the concentrated water in the delivery pipeline in real time.

[0013] The online flow meter is electrically connected to the delivery pump for controlling the flow of the delivery pump.

[0014] Preferably, the concentrated water delivery equipment further includes a concentrated water tank, which is arranged at the front end of the delivery pump and is used to store concentrated water.

[0015] Preferably, a liquid level meter is provided in the concentrated water tank, and the liquid level meter monitors the liquid level in the concentrated water tank. The liquid level meter is electrically connected to the delivery pump.

[0016] Preferably, the concentrated water is sprayed to the material inlet of the vertical mill equipment.

[0017] Preferably, the leachate treatment equipment includes a sedimentation processor, a biochemical processor, a filtration processor and a concentrated water output pipe connected in sequence, and the concentrated water is connected to the concentrated water conveying equipment via the concentrated water output pipe.

[0018] Preferably, the filter processor separates the concentrated water and the clean water by filtering, the concentrated water is output through the concentrated water output pipe, and the clean water is transported to the cooling tower for water replenishment.

[0019] Preferably, the biochemical processor is provided with a dehydrator, which dehydrates the sludge, and the clear liquid is returned to the inlet of the biochemical processor through a recovery pipeline, and the sludge is used as fuel.

[0020] Preferably, a regulating tank is provided in the sedimentation processor, and the hardness of the leachate is adjusted by adding chemical substances into the regulating tank.

[0021] According to the above technical solution, the leachate treatment equipment of the present invention treats the leachate of domestic garbage, and transports the concentrated water obtained by the treatment to the vertical mill equipment through the concentrated water transport equipment, providing a spray water source for the vertical mill equipment.

[0022] The amount of concentrated water required to be injected into the mill is determined by the mill's feed rate. Consequently, as the mill's feed rate changes, the amount of concentrated water required will also change. Therefore, a flow-adjustable pump is installed in the delivery pipeline. By adjusting the pump's flow rate based on the mill's feed rate, the appropriate amount of water injected into the mill can be achieved.

[0023] During the production process of the vertical mill 3, spraying water onto the raw material of the vertical mill can stabilize the material layer of the grinding disc and reduce the temperature of the raw material, thereby increasing the output of the vertical mill and also extending the service life of the vertical mill.

[0024] Water spraying on vertical grinding equipment can play the following roles:

[0025] 1) Stabilize the material layer on the grinding disc: By spraying water inside the mill, the material layer on the grinding disc can be stabilized, and the speed at which the material moves toward the edge of the grinding disc due to centrifugal force can be changed, so that the material forms a stable material bed on the grinding disc, which is beneficial to improve the grinding efficiency.

[0026] 2) Accelerate the settling speed of material particles on the grinding disc: Water spraying accelerates the settling speed of material particles on the grinding disc, which helps the material to be crushed and pulverized faster.

[0027] 3) Changing the outlet temperature: Water injection within the mill can also regulate the outlet temperature. By controlling the water injection, the outlet cement temperature can be influenced, which is crucial for controlling product temperature. Specifically, during operation, the grinding friction of the vertical mill generates and accumulates a significant amount of heat within the mill. Failure to promptly cool the mill will not only affect the quality of the raw material but also damage the mill. Water injection can effectively reduce the temperature of the mill, thereby protecting the mill and improving production efficiency.

[0028] Therefore, it can be seen that the vertical mill equipment has no requirements for the water quality of the spray water. Therefore, the concentrated water generated by the leachate treatment equipment can be sprayed into the vertical mill equipment instead of clean water. On the one hand, it can save the use of clean water and meet the water spraying requirements in the production process of the vertical mill equipment without affecting the product quality of the vertical mill equipment. On the other hand, it can also effectively absorb the concentrated water generated by the leachate treatment equipment, thereby avoiding the use of evaporation and crystallization method to treat the concentrated water and saving energy.

[0029] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0031] Figure 1 This is a schematic diagram of a device for absorbing concentrated leachate water;

[0032] Figure 2 This is the work flow chart of leachate treatment equipment.

[0033] Description of Reference Numerals

[0034] 1 leachate treatment equipment 21 delivery pipeline

[0035] 3 vertical mill equipment 22 delivery pump

[0036] 23 water injection port 24 concentrated water pool

[0037] 25 liquid level gauge 11 concentrated water output pipe

[0038] 26 Online flow meter DETAILED DESCRIPTION

[0039] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0040] In the present utility model, unless otherwise stated, directional words such as "one end, the other end, front end" contained in the term only represent the direction of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0041] See also Figure 1 The device for absorbing concentrated leachate water comprises a leachate treatment device 1 and a concentrated water conveying device connected to the leachate treatment device 1 at one end, and the other end of the concentrated water conveying device is connected to the vertical mill 3 to provide a spray water source to the vertical mill 3;

[0042] The concentrated water conveying equipment includes a conveying pipeline 21, a conveying pump 22 and a water spray inlet 23. One end of the conveying pipeline 21 is connected to the leachate treatment equipment 1, and the other end is connected to the vertical mill equipment 3 through the water spray inlet 23. The conveying pump 22 is arranged on the conveying pipeline 21 to control the flow rate of concentrated water in the conveying pipeline 21.

[0043] Through the implementation of the above technical solution, the leachate treatment equipment 1 treats the leachate of domestic waste, and transports the concentrated water obtained by the treatment to the vertical mill equipment 3 through the concentrated water transport equipment, providing a spray water source for the vertical mill equipment 3.

[0044] The amount of concentrated water required to be injected into the vertical mill 3 is determined by the feed rate of the vertical mill 3. Therefore, as the feed rate of the vertical mill 3 changes, the amount of concentrated water required also changes. Therefore, a flow-adjustable delivery pump 22 is provided on the delivery pipeline 21. By regulating the flow rate of the delivery pump 22 according to the feed rate of the vertical mill 3, an appropriate amount of water can be injected into the raw materials in the vertical mill 3.

[0045] During the production process of the vertical mill 3 , spraying water onto the raw material of the vertical mill 3 can stabilize the material layer of the grinding disc and reduce the temperature of the raw material, thereby increasing the output of the vertical mill 3 and also extending the service life of the vertical mill 3 .

[0046] The water spraying of vertical grinding equipment 3 can play the following roles:

[0047] 1) Stabilize the material layer on the grinding disc: By spraying water inside the mill, the material layer on the grinding disc can be stabilized, and the speed at which the material moves toward the edge of the grinding disc due to centrifugal force can be changed, so that the material forms a stable material bed on the grinding disc, which is beneficial to improve the grinding efficiency.

[0048] 2) Accelerate the settling speed of material particles on the grinding disc: Water spraying accelerates the settling speed of material particles on the grinding disc, which helps the material to be crushed and pulverized faster.

[0049] 3) Changing the outlet temperature: Water injection within the mill can also regulate the outlet temperature. By controlling the water injection, the outlet cement temperature can be influenced, which is crucial for controlling product temperature. Specifically, during operation, the grinding friction of the vertical mill 3 generates and accumulates a significant amount of heat within the mill. Failure to promptly cool the mill 3 will not only affect the quality of the raw material but also damage the mill 3. Water injection can effectively reduce the temperature of the mill, thereby protecting the mill 3 and improving production efficiency.

[0050] Therefore, it can be seen that the vertical mill equipment 3 has no requirements for the water quality of the spray water, so the concentrated water generated by the leachate treatment equipment can be sprayed into the vertical mill equipment 3 instead of clean water. On the one hand, the use of clean water can be saved, while meeting the water spraying requirements in the production process of the vertical mill equipment 3 without affecting the product quality of the vertical mill equipment 3. On the other hand, it can also effectively absorb the concentrated water generated by the leachate treatment equipment 1, thereby avoiding the use of evaporation and crystallization method to treat the concentrated water and saving energy.

[0051] In this embodiment, preferably, the water delivery equipment further includes an online flow meter 26 , which monitors the flow of concentrated water in the delivery pipeline 21 in real time.

[0052] The online flow meter 26 is electrically connected to the delivery pump 22 for controlling the flow of the delivery pump 22 .

[0053] Since water needs to be sprayed inside the vertical mill equipment 3 to stabilize the material layer on the grinding wheel, the amount of concentrated water used needs to be controlled according to the feed of the vertical mill equipment 3 during the actual production process. Therefore, the concentrated water conveying equipment also needs to be equipped with an online flow meter 26 to monitor the input amount of concentrated water so that the amount of concentrated water entering the vertical mill equipment 3 is appropriate.

[0054] In this embodiment, preferably, the concentrated water delivery equipment further includes a concentrated water tank 24 , which is disposed at the front end of the delivery pump 22 and is used to store concentrated water.

[0055] The brine is stored in the brine tank 24, which effectively balances the brine output from the leachate treatment equipment 1 with the brine demand from the vertical grinding mill 3. When there's a mismatch between the brine output and demand, the brine in the brine tank 24 acts as a buffer. When the brine output is high, excess brine is stored in the brine tank 24. When the demand for brine is even higher, the brine stored in the brine tank 24 makes up the difference.

[0056] In this embodiment, preferably, a liquid level meter 25 is provided in the concentrated water tank 24 , and the liquid level meter 25 monitors the liquid level in the concentrated water tank 24 . The liquid level meter 25 is electrically connected to the delivery pump 22 to control the start and stop of the delivery pump 22 .

[0057] A level gauge 25 is installed in the concentrate tank 24 to monitor the liquid level there in real time. The level of the concentrate tank 24 has upper and lower limits. When the level gauge 25 detects that the liquid level in the concentrate tank 24 is above the upper limit, the control system controls the delivery pump 22 to deliver more concentrate to the vertical mill 3 or stops the leachate treatment equipment from delivering concentrate to the concentrate tank 24. When the level gauge 25 detects that the liquid level in the concentrate tank 24 is below the lower limit, the control system controls the delivery pump 22 to reduce or stop delivering concentrate.

[0058] Preferably, the vertical mill equipment 3 is provided with a backup water supply system, and when the concentration is insufficient, the backup water supply system can be activated to provide spraying water to the vertical mill equipment 3 .

[0059] In this embodiment, preferably, concentrated water is sprayed to the material inlet of the vertical mill equipment 3 .

[0060] Compared with spraying inside the vertical mill equipment 3, spraying concentrated water onto the material that is about to enter the vertical mill equipment 3 makes the material carry an appropriate amount of moisture before entering the vertical mill equipment 3, which is conducive to evenly spraying the concentrated water on the surface of the material. Compared with spraying water inside the mill, spraying outside the vertical mill equipment 3 can better distribute the concentrated water evenly in the material.

[0061] Therefore, spraying concentrated water to the material inlet of the vertical mill equipment 3 can significantly improve the grinding conditions, because the material entering the vertical mill equipment 3 carries an appropriate amount of moisture, which can make it easier for the material to form a stable material bed on the grinding disc, thereby effectively improving the grinding conditions and increasing the hourly output.

[0062] Preferably, the leachate treatment equipment 1 includes a sedimentation processor, a biochemical processor, a filtration processor and a concentrated water output pipe 11 connected in sequence, and the concentrated water is connected to the concentrated water conveying equipment through the concentrated water output pipe 11.

[0063] See also Figure 2 As can be seen from the work flow diagram of the leachate treatment equipment 1 shown, the sedimentation processor includes a screen and a regulating tank. The leachate is first filtered through the screen. The clear liquid obtained by the screen filtration and the clear liquid obtained after coagulation reaction and precipitation in the sedimentation tank will enter the regulating tank, and the sediment will be directly cleaned into the garbage bin.

[0064] The biochemical processor includes an anaerobic processor (UASB), sedimentation / AO regulation and A / O system. The clear liquid obtained from the sedimentation processor undergoes anaerobically treatment and bipolar biochemical treatment at this location. The sludge obtained from the treatment will enter the thickening tank for separation of sludge and clean water, and the clear liquid obtained from the biochemical processor will enter the filtration processor.

[0065] The filter processor includes an ultrafiltration system, a nanofiltration system and a reverse osmosis system. The concentrated liquid obtained by filtering through the ultrafiltration system will be input into the concentrated water conveying equipment through the concentrated water output pipe 11 and finally enter the vertical mill equipment 3. The clear liquid obtained by the filter processor has relatively pure water quality and can be used for cooling tower water replenishment and other environments with high water quality requirements.

[0066] In this embodiment, preferably, the filter processor separates concentrated water and clean water by filtering, the concentrated water is output through the concentrated water output pipe 11, and the clean water is transported to the cooling tower for water replenishment.

[0067] In this embodiment, preferably, a dehydrator is provided in the biochemical processor, and the dehydrator dehydrates the sludge, and the clear liquid is returned to the inlet of the biochemical processor through a recovery pipeline, and the sludge is used as fuel.

[0068] To fully utilize water resources, a dehydrator is installed inside the biochemical processor to recycle the water in the sludge. The dehydrator separates the water from the sludge. The separated water enters the inlet of the biochemical processor for further biochemical treatment, while the separated sludge can be used as fuel, achieving the effect of waste utilization.

[0069] In this embodiment, preferably, an adjustment tank is provided in the sedimentation processor, and the hardness of the leachate is adjusted by adding chemicals into the adjustment tank.

[0070] If the water treated by the filter is calcium (Ca 2 +) and magnesium (Mg2+) content is too high, which will easily cause scaling and require increased frequency of filter cleaning, which will easily damage the filter membrane of the filter and lead to high operating costs of the filter.

[0071] The leachate is generally hard, and the calcium (Ca 2 +) and magnesium (Mg2+) content is high, preferably, the calcium (Ca) in the leachate can be removed by adding sodium hydroxide into the regulating tank. 2 +) and magnesium (Mg2+), avoid calcium (Ca 2 +) and magnesium (Mg2+) enter the filter processor and form scale inside the filter processor, reducing the operating cost of the filter processor.

[0072] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0073] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present utility model will no longer separately describe various possible combinations.

[0074] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A device for treating concentrated leachate, characterized in that: The device for absorbing concentrated water of the leachate comprises a leachate treatment device (1) and a concentrated water conveying device connected to the leachate treatment device (1) at one end, the other end of the concentrated water conveying device being connected to a vertical mill device (3), and the concentrated water conveying device providing a spraying water source to the vertical mill device (3); The concentrated water conveying equipment comprises a conveying pipeline (21), a conveying pump (22) and a water spray inlet (23); one end of the conveying pipeline (21) is connected to the leachate treatment equipment (1), and the other end is connected to the vertical mill equipment (3) through the water spray inlet (23); the conveying pump (22) is arranged on the conveying pipeline (21) and is used to control the flow rate of the concentrated water in the conveying pipeline (21).

2. The device for treating concentrated leachate according to claim 1, characterized in that: The concentrated water delivery equipment further includes an online flow meter (26), and the online flow meter (26) monitors the flow rate of the concentrated water in the delivery pipeline (21) in real time; The online flow meter (26) is electrically connected to the delivery pump (22) for controlling the flow rate of the delivery pump (22).

3. The device for treating concentrated leachate according to claim 1, characterized in that: The concentrated water delivery equipment further comprises a concentrated water pool (24), which is arranged at the front end of the delivery pump (22) and is used for storing concentrated water.

4. The device for treating concentrated leachate according to claim 3, characterized in that: A liquid level meter (25) is provided in the concentrated water pool (24), and the liquid level meter (25) monitors the liquid level in the concentrated water pool (24). The liquid level meter (25) is electrically connected to the delivery pump (22).

5. The device for treating concentrated leachate according to claim 1, characterized in that: The concentrated water is sprayed to the material inlet of the vertical mill equipment (3).

6. The device for treating concentrated leachate according to claim 1, characterized in that: The leachate treatment equipment (1) comprises a sedimentation processor, a biochemical processor, a filtration processor and a concentrated water output pipe which are connected in sequence, and the concentrated water is connected to the concentrated water conveying equipment via the concentrated water output pipe (11).

7. The device for treating concentrated leachate according to claim 6, characterized in that: The filter processor separates the concentrated water and the clean water through filtration, the concentrated water is output through the concentrated water output pipe (11), and the clean water is transported to the cooling tower for water replenishment.

8. The device for treating concentrated leachate according to claim 6, characterized in that: The biochemical processor is provided with a dehydrator, which dehydrates the sludge, and the clear liquid is sent back to the inlet of the biochemical processor through a recovery pipeline. The sludge is used as fuel.

9. The device for treating concentrated leachate according to claim 6, characterized in that: A regulating tank is provided in the sedimentation processor, and the hardness of the leachate is adjusted by adding chemical substances into the regulating tank.

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