TWI740612B - Feedlot wastewater processing method and device thereof - Google Patents

Abstract

A feedlot wastewater processing method and device thereof are provided to solve the problem where the condensate formed by the conventional feedlot wastewater cannot achieve a standard of the wastewater disposal. The method includes input feedlot wastewater into a furnace and provides a heat source for the feedlot wastewater so that the temperature of the feedlot wastewater can be maintained within a temperature range. The feedlot wastewater convert into water vapor in the furnace. The upper limit value of the temperature range is less than 35℃, and provides a cool source for the water vapor whose temperature is lower than the temperature of the heat source so that the water vapor is condensates to condensate.

Description

Animal husbandry wastewater treatment method and device

The invention relates to a waste water treatment method and its device, in particular to a livestock waste water treatment method and its device using a low-temperature evaporation method.

Conventional livestock wastewater treatment methods generally involve solid-liquid separation, anaerobic fermentation, and eutrophic treatment to reduce the pollution of livestock wastewater, increase the total amount of condensed water that can be recycled and reused, and increase the amount of condensate that can be used as bio-organic fertilizer. Concentration of organic compounds. The conventional livestock wastewater treatment method uses a sewage evaporator to accommodate livestock wastewater, and heats the livestock wastewater to 100°C through an electric heating device to evaporate the livestock wastewater to form water vapor; and cool the livestock wastewater through a heat recovery device Water vapor makes it form distilled water for recycling. The livestock wastewater treatment method similar to the prior art has been disclosed in the patent case of China Announcement No. 207330610.

)，並且根據

+OH←→NH₃+H₂O化學反應式可以得知，當該畜牧廢水的溫度上升超過一溫度門檻值(如：35℃)時，上述化學反應式的平衡將會持續向右移動，使銨離子源源不斷地形成氨(NH₃)，導致蒸發且凝結後所形成的冷凝水中含有超標的氨，而無法達到廢水排放的標準，此外，亦造成畜牧廢水中的胺基酸含量降低，而無法作為生物有機肥料使用。 Because the amino acids in livestock wastewater will gradually form ammonium ions (

), and according to

The +OH←→NH ₃ +H ₂ O chemical reaction formula shows that when the temperature of the livestock wastewater rises above a temperature threshold (for example: 35°C), the balance of the above chemical reaction formula will continue to shift to the right. The ammonium ion source continuously forms ammonia (NH ₃ ), causing the condensed water formed after evaporation and condensation to contain excessive ammonia, which cannot meet the wastewater discharge standard. In addition, it also reduces the amino acid content in the livestock wastewater. It cannot be used as a bio-organic fertilizer.

In view of this, the conventional livestock wastewater treatment method does still have to be improved. want.

In order to solve the above-mentioned problems, the purpose of the present invention is to provide a method for treating livestock wastewater, which can adopt a low-temperature evaporation method.

The second objective of the present invention is to provide a livestock wastewater treatment device that uses the above method to treat livestock wastewater.

The directionality described in the full text of the present invention or its similar terms, such as "front", "rear", "left", "right", "up (top)", "down (bottom)", "inner", "outer" , "Side", etc., mainly refer to the direction of the attached drawings. The terms of the directionality or similar terms are only used to assist in the description and understanding of the embodiments of the present invention, and are not used to limit the present invention.

The elements and components described in the full text of the present invention use the quantifiers "one" or "one" for convenience and to provide the general meaning of the scope of the present invention; in the present invention, it should be construed as including one or at least one, and single The concept of also includes the plural, unless it clearly implies other meanings.

Approximate terms such as "combination", "combination" or "assembly" mentioned in the full text of the present invention mainly include the types that can be separated without destroying the components after being connected, or the components cannot be separated after being connected, which are common knowledge in the field Those can be selected based on the materials of the components to be connected or assembly requirements.

The livestock wastewater treatment method of the present invention includes: introducing livestock wastewater into a furnace body, and providing a heat source to the livestock wastewater, maintaining the temperature of the livestock wastewater within a temperature range, and evaporating in the furnace body to form For water vapor, the upper limit of the temperature range value is less than 35°C; and a cold source is provided to the water vapor, the upper limit of the cold source temperature is less than 23°C, and the lower limit of the cold source temperature is equal to 5℃, the temperature of the cold source is lower than the temperature of the heat source, so that the water vapor condenses to form condensation water.

The livestock wastewater treatment device of the present invention includes: the furnace body, a liquid storage chamber and a reaction chamber are formed in the furnace body that communicate with each other, the reaction chamber is located above the liquid storage chamber, and the furnace body has the respective communication A water inlet and a discharge port between the liquid storage chamber and the outside. The discharge port is located below the water inlet, and a control valve is used to open or close the discharge port. The top wall of the furnace body forms an inclined plate shape, and It has a water collecting end; a heat preservation piece located in the liquid storage chamber and between the water inlet and the discharge port; a liquid collecting piece located in the reaction chamber and oppositely located below the water collecting end; and The cooling element is located on the top wall of the furnace body.

Accordingly, the livestock wastewater treatment method and device of the present invention can make the temperature of the livestock wastewater not exceed 35°C during the evaporation phenomenon, so that the condensed water formed after the livestock wastewater evaporates and condenses is not Contains excessive ammonia, and most of the amino acid components in the livestock manure water can remain in the body formed after evaporation, and be used as a bio-organic fertilizer. In this way, the livestock wastewater treatment method and device of the present invention have the effects of reducing environmental pollution, improving economic efficiency, and reducing energy cost consumption.

Wherein, the thermal insulation member may be a hollow pipe member which penetrates the side wall of the furnace body and supplies hot water to pass through. In this way, the system has the effect of simple manufacturing.

Wherein, the hollow tube can be made of graphene material. In this way, it is possible to avoid the vulcanization reaction of the hollow pipe, which causes the condensed water to contain heavy metal components, which has the effect of further reducing environmental pollution.

Wherein, the cooling element can be a gas storage device filled with liquid carbon dioxide, liquid nitrogen or liquid air. In this way, the system has the effect of reducing the cost of livestock wastewater treatment.

Wherein, the furnace system may have a drain port connecting the reaction chamber with the outside, and the drain port is connected to the liquid collecting member. In this way, the condensed water collected in the liquid collecting member can be discharged to the outside through the drain port in real time.

The livestock wastewater treatment device of the present invention may further include an agitator, the agitator is located between the water inlet and the discharge port, and has a rotating shaft, and one end of the rotating shaft located in the liquid storage chamber has several blades, The blades respectively extend radially from the rotating shaft, and the other end of the rotating shaft penetrates the side wall of the furnace body and is connected with a driving motor. In this way, the livestock wastewater at the bottom of the liquid storage chamber can be turned to the upper layer to prevent the livestock wastewater at the bottom of the liquid storage chamber from being unable to evaporate smoothly, which has the effect of improving the overall evaporation efficiency of the livestock wastewater.

The livestock wastewater treatment device of the present invention may further include an evaporation tank located in the reaction chamber and below the water inlet, and the bottom of the evaporation tank has several drainage holes. In this way, the livestock wastewater can be evaporated during the process of flowing into the liquid storage chamber through the plurality of drainage holes, which has the effect of improving the overall evaporation efficiency of the livestock wastewater.

The animal husbandry wastewater treatment device of the present invention may further include a pushing component having a central shaft opposite to the discharge port, one end of the central shaft located in the liquid storage chamber has a spiral blade, and the other end penetrates the The side wall of the furnace body is connected with a driving motor. In this way, the remaining objects after the evaporation of the livestock wastewater can be pushed out of the discharge port, which has the effect of improving the convenience of use.

Wherein, several bumps can be formed on the inner surface of the top wall of the furnace body. In this way, the condensed water can be collected at the top of each bump and accumulate a certain amount of weight to flow quickly toward the water collecting end along the slope of the top wall, which can improve the condensate water collection. The efficiency of the collection efficiency.

The animal husbandry wastewater treatment device of the present invention may further include a guide assembly which is combined with the top wall of the furnace body and has a plurality of guides, and one end of each guide is connected to the water collecting end. In this way, the condensed water can be made to flow along the guides toward the water collecting end, which has the effect of improving the collection efficiency of condensed water.

〔this invention〕

1: Furnace

11: Water inlet

12: Drain

13: Control valve

14: catchment end

15: Drain

16: inner surface

17: bump

2: Insulation parts

3: Liquid collection part

4: Cooling parts

5: agitator

51: Rotation axis

52: blade

53: drive motor

6: Evaporation tank

61: Drain hole

7: Push the component

71: central axis

72: Spiral blade

73: drive motor

8: Guiding components

81: guide

C1: Reservoir

C2: reaction chamber

S1: Evaporation step

S2: coagulation step

[Figure 1] The method flow chart of the livestock wastewater treatment method of the present invention.

[Figure 2] A combined perspective view of the first embodiment of the livestock wastewater treatment device of the present invention.

[Figure 3] A combined perspective view of the second embodiment of the livestock wastewater treatment device of the present invention.

[Figure 4] A cross-sectional view along the line A-A in Figure 3.

[Figure 5] A cross-sectional view taken along the line A-A in Figure 3.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention will be described in detail in conjunction with the accompanying drawings as follows: Please refer to Figure 1. It is a preferred embodiment of the livestock wastewater treatment method of the present invention, and includes the following steps.

An evaporation step S1: the livestock wastewater is introduced into a furnace, and a heat source is provided to the livestock wastewater to maintain the temperature of the livestock wastewater within a temperature range, and evaporate in the furnace to form water vapor. The upper limit of the range value is less than 35°C; wherein, the temperature of the water vapor can also fall approximately within the temperature range value. In detail, because the amino acid component in the livestock wastewater will gradually form ammonium ions, and under chemical reaction, the ammonium ions will gradually be converted into ammonia, or from ammonia back to ammonium ions, however, when the livestock wastewater When the temperature rises above the upper limit temperature, ammonium ions will continue to be converted into ammonia and cannot be converted back to ammonium ions, causing the water vapor formed by the evaporation of the livestock wastewater to contain excessive ammonia, resulting in condensed water formed by the condensation of the water vapor The problem that the wastewater discharge standard cannot be reached, therefore, in this embodiment, the upper limit of the temperature range value can be made less than 35° C. to avoid the above-mentioned problem.

A condensation step S2: a cold source is provided to the water vapor, and the temperature of the cold source is low At the temperature of the heat source, the water vapor is condensed to form condensed water. For example, when the temperature of the water vapor is 35°C and the relative humidity in the furnace body is 50%, it can be calculated according to the psychrometric chart that the temperature of the water vapor must be at least below 23°C At this time, the water vapor can be condensed into condensed water, that is, the temperature of the cold source must be at least less than 23°C. In this embodiment, the temperature of the cold source may fall approximately between 5°C and 10°C. This is the limit so that the water vapor can be condensed into condensed water.

Please refer to Figure 2, in this embodiment, the livestock wastewater treatment method can be executed through a livestock wastewater treatment device, the livestock wastewater treatment device includes a furnace body 1, an insulation member 2, a liquid collecting member 3 and a cooling element 4, the thermal insulation element 2 and the liquid collecting element 3 are located in the furnace body 1, and the cooling element 4 is located in the furnace body 1.

The shape of the furnace body 1 is not limited in the present invention. In this embodiment, the furnace body 1 may be a barrel shape, and preferably may be made of graphene. The furnace body 1 is used for storing livestock waste water, and the livestock waste water can evaporate and condense inside the furnace body 1 to form condensed water. Specifically, the inside of the furnace body 1 forms a liquid storage chamber C1 and a reaction chamber C2 that are communicated with each other. The liquid storage chamber C1 is used to store livestock wastewater, and the reaction chamber C2 is located above the liquid storage chamber C1. The livestock wastewater system can cause condensation in the reaction chamber C2.

The furnace body 1 has a water inlet 11 and a discharge port 12 respectively connecting the liquid storage chamber C1 and the outside. The water inlet 11 can be arranged on the side wall of the furnace body 1 and used to provide the livestock waste water flowing from the outside. The liquid storage chamber C1. The discharge port 12 is located below the water inlet 11 and can be arranged on the side wall or the bottom of the furnace body 1. The discharge port 12 is used to provide that the remaining objects after the evaporation of the livestock wastewater are discharged to the outside from the liquid storage chamber C1 . A control valve 13 is used to open or close the discharge port 12. In this embodiment, the control valve 13 can be a solenoid valve.

Please refer to Figure 3, the top wall of the furnace body 1 can be formed in a sloping plate shape, and has a water collecting end 14, the water collecting end 14 is preferably located at the lowest point of the top wall; End 14 use In order to collect the condensed water attached to the top wall, the condensed water can drip into the liquid collecting part 3 along the water collecting end 14.

The thermal insulation member 2 is located in the liquid storage chamber C1 and between the water inlet 11 and the discharge port 12. The thermal insulation member 2 is used to provide a heat source to the livestock wastewater stored in the liquid storage chamber C1, so that the temperature of the livestock wastewater can be maintained within the temperature range value, so that the livestock wastewater can continue to produce evaporation, and the The water vapor generated by livestock wastewater will not contain excessive ammonia, and cannot meet the wastewater discharge standards. In this embodiment, the thermal insulation member 2 may be a hollow pipe that penetrates the side wall of the furnace body 1. The hollow pipe can introduce hot water to provide a heat source for the livestock wastewater stored in the liquid storage chamber C1. The hollow tube can be made of graphene and other materials, for example. In other embodiments, the thermal insulation member 2 can be a heating device such as an electric heating tube or a heating rod, but it is not limited thereto.

The liquid collecting member 3 is located in the reaction chamber C2 and is opposite to the water collecting end 14. The liquid collecting member 3 is used for receiving the condensed water formed by the evaporation and condensation of the livestock wastewater. In this embodiment In this case, the liquid collecting part 3 can be erected on the side wall of the furnace body 1.

The cooling element 4 is located on the top wall of the furnace body 1 and is used to output a cold source toward the top wall to generate a temperature difference between the top wall and the livestock wastewater, so that the water vapor generated by the evaporation of the livestock wastewater is condensed Phenomenon and condense to form condensed water. For example, the cooling element 4 can be a conventional condenser or a gas storage device filled with high-pressure liquid gas such as liquid carbon dioxide, liquid nitrogen or liquid air.

The furnace body 1 of the livestock waste water treatment device of the present invention may also have a drain port 15 connecting the reaction chamber C2 with the outside. The drain port 15 is connected to the liquid collecting member 3 so that the The condensed water can be immediately discharged to the outside through the drain 15.

The livestock wastewater treatment device of the present invention may also have an agitator 5 located in the liquid storage chamber C1 and between the water inlet 11 and the discharge port 12. Specific and In other words, the agitator 5 has a rotating shaft 51. The rotating shaft 51 is located at one end of the liquid storage chamber C1. The other end penetrates the side wall of the furnace body 1 and is connected to a driving motor 53 for driving the rotating shaft 51 to rotate, thereby driving the plurality of blades 52 to rotate synchronously.

Please refer to Figure 3, which is the second embodiment of the livestock wastewater treatment device of the present invention. Compared with the above-mentioned first embodiment, this embodiment may also have an evaporation tank 6 located in the reaction chamber. Room C2. Specifically, the evaporation tank 6 is coupled to the side wall of the furnace body 1 below the water inlet 11 and communicates with the water inlet 11. The bottom of the evaporation tank 6 is provided with a plurality of drainage holes 61, and the apertures of the plurality of drainage holes 61 allow livestock waste water to pass through, so that the livestock waste water flowing into the furnace body 1 from the water inlet 11 can first flow into the evaporation tank 6 , And then flow into the liquid storage chamber C1 through the plurality of drain holes 61. Wherein, there is an axial height between the evaporation tank 6 and the liquid storage chamber C1, so that when the livestock wastewater flows into the liquid storage chamber C1 through the plurality of drainage holes 61, evaporation can occur. The directional height is common knowledge in the technical field to which the present invention belongs, and will not be repeated here.

The livestock wastewater treatment device of the present invention may also have a pusher assembly 7 having a central shaft 71 opposite to the discharge port 12, and one end of the central shaft 71 located at the liquid storage chamber C1 has a spiral The other end of the vane 72 penetrates the side wall of the furnace body 1 and is connected to a drive motor 73. The drive motor 73 is used to drive the central shaft 71 to rotate, thereby driving the spiral vane 72 to rotate synchronously, so that the The remaining objects after the livestock wastewater evaporates push out of the discharge port 12.

Please refer to Figures 4 and 5, the inner surface 16 of the top wall of the furnace body 1 may be formed with a plurality of bumps 17. In this embodiment, each bump 17 may be an acute angle; or, The livestock wastewater treatment device of the present invention may also have a guide assembly 8 which is combined with the inner surface 16 of the top wall of the furnace body 1, and has a plurality of guide members 81, each of which is One end is connected to the water collecting end 14, so that the condensed water is collected to the water collecting end 14 along each of the guide parts 81 and drips onto the liquid collecting part 3 in. In this embodiment, each of the guiding members 81 can be a rope body such as a nylon rope, but it is not limited thereto.

Please refer to Figure 3, when the livestock wastewater treatment device of the present invention is used to implement the above livestock wastewater treatment method, the livestock wastewater is input into the furnace body 1 through the water inlet 11, and the livestock wastewater flows into the evaporation first In the tank 6, it flows into the liquid storage chamber C1 through the drainage holes 61 of the evaporation tank 6; the heat source is provided to the livestock wastewater through the thermal insulation member 2, so that the temperature of the livestock wastewater can be maintained within the temperature range value , So that the livestock wastewater can continue to produce evaporation; during the evaporation process, the livestock wastewater can be continuously rotated through the agitator 5 to control the plurality of blades 52 to turn the livestock wastewater; and, through the cooling member 4 pairs The top wall of the furnace body 1 outputs a cold source to generate a temperature difference between the top wall and the livestock wastewater, so that the water vapor generated by the evaporation of the livestock wastewater will condense and condense on the top wall to form condensed water; The condensed water on the top wall can be along the plurality of bumps 17 formed on the inner surface 16, or through the guide assembly 8 provided on the top wall, to collect to the water collection end 14 and drip to the collection. The liquid part 3 is temporarily stored; the condensed water in the liquid part 3 can be discharged to the outside through the drain 15; when the livestock waste water no longer evaporates, it can be controlled by the pusher assembly 7 The central shaft 71 rotates, so that the spiral blade 72 rotates synchronously to push the remaining objects after the livestock wastewater evaporates out of the discharge port 12.

In summary, the livestock wastewater treatment method and device of the present invention are capable of preventing the temperature of the livestock wastewater from evaporating above 35°C, so that the condensed water formed after the livestock wastewater evaporates and condenses, It will not contain excessive ammonia, and most of the amino acid components in the livestock manure water can remain in the body formed after evaporation, and be used as a bio-organic fertilizer. In this way, the livestock wastewater treatment method and device of the present invention have the effects of reducing environmental pollution, improving economic efficiency, and reducing energy cost consumption.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art without departing from the spirit and scope of the present invention may make various changes and modifications relative to the above-mentioned embodiments. The technical category protected by the invention, therefore the scope of protection of the invention The scope of the patent application attached hereby shall prevail.

S1: Evaporation step

S2: coagulation step

Claims (11)

A method for treating livestock wastewater, comprising: introducing livestock wastewater into a furnace body, and providing a heat source to the livestock wastewater, maintaining the temperature of the livestock wastewater within a temperature range, and evaporating in the furnace body to form water vapor , The upper limit of the temperature range value is less than 35°C; and a cold source is provided to the water vapor, the upper limit of the cold source temperature is less than 23°C, and the lower limit of the cold source temperature is equal to 5°C , The temperature of the cold source is lower than the temperature of the heat source, so that the water vapor is condensed to form condensed water. An animal husbandry wastewater treatment device for performing the animal husbandry wastewater treatment method as claimed in claim 1, comprising: the furnace body, a liquid storage chamber and a reaction chamber communicating with each other are formed in the furnace body, and the reaction chamber is located in the liquid storage Above the chamber, the furnace body has a water inlet and a discharge port respectively connecting the liquid storage chamber and the outside. The discharge port is located below the water inlet, and a control valve is used to open or close the discharge port. The furnace body The top wall is formed in a sloping plate shape and has a water collection end; a heat preservation member is located in the liquid storage chamber and between the water inlet and the discharge port; a liquid collection member is located in the reaction chamber, And the pair is located under the water collecting end; and a cooling element is located on the top wall of the furnace body. For example, the livestock wastewater treatment device of claim 2, wherein the thermal insulation member is a hollow pipe member, and the hollow pipe member penetrates the side wall of the furnace body and supplies hot water therethrough. For example, the livestock wastewater treatment device of claim 3, wherein the hollow pipe is made of graphene material. For example, the livestock wastewater treatment device of claim 2, wherein the cooling element is a gas storage device filled with liquid carbon dioxide, liquid nitrogen or liquid air. Such as the livestock waste water treatment device of claim 2, wherein the furnace body has a connection with the The reaction chamber is connected with a drainage port on the outside, and the drainage port is connected with the liquid collecting part. For example, the livestock wastewater treatment device of any one of claim 2 to 6, further comprising an agitator, the agitator is located between the water inlet and the discharge port, and has a rotating shaft, the rotating shaft is located in the liquid storage chamber One end has several blades, each of the blades extends radially from the rotating shaft, and the other end of the rotating shaft penetrates the side wall of the furnace body and is connected with a driving motor. For example, the livestock wastewater treatment device of claim 7 further includes an evaporation tank located in the reaction chamber and below the water inlet, and the bottom of the evaporation tank has a plurality of drainage holes. For example, the animal husbandry wastewater treatment device of claim 7 further includes a pusher assembly having a central shaft opposite to the discharge port, one end of the central shaft located in the liquid storage chamber has a spiral blade, and the other end penetrates The side wall of the furnace body is connected with a driving motor. Such as the livestock wastewater treatment device of claim 7, wherein the inner surface of the top wall of the furnace body is formed with a plurality of bumps. For example, the animal husbandry wastewater treatment device of claim 7 further includes a guide assembly that is combined with the top wall of the furnace body and has a plurality of guides, and one end of each guide is connected to the water collection end .

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