KR100385091B1 - Treatment method and apparatus for pig stale - Google Patents

Abstract

The present invention relates to a treatment method and a treatment device of pig urine in which a concentrated phase is used as compost and the gas phase is condensed and released into water to prevent environmental pollution by removing the impurities of the pig urine after separating them into a gaseous phase and a concentrated phase.

After supplying the urine to the first heat exchanger and contacting it with a heat source for heating, the gaseous phase is separated into gaseous and liquid urine in the first gas-liquid separator, and the separated gaseous phase is condensed in a condenser and stored in a separation tank. A first boiling process discharged from the gas-liquid separator; And supplying the liquid urine discharged from the first boiling process to the second heat exchanger and contacting it with a heat source for heating to separate the gaseous phase and the concentrated phase in the second gas-liquid separator, and using the separated gaseous phase as a heat source of the first heat exchanger. A second boiling process, which is then transferred to a first drain tank, and the separated concentrated phase is transferred to a concentrated urine storage tank,

The heat source of the second heat exchanger is supplied from the outside, the gaseous phase transferred to the first drain tank is condensed in the condenser and stored in the separation tank, characterized in that for transporting and storing the liquid phase of the first drain tank to the separation tank.

Description

Treatment method and apparatus for treating pig urine {Treatment method and apparatus for pig stale}

The present invention relates to a treatment method and a treatment device of the pig urine, and more particularly, the pressure of the gas-liquid separator separating the pig urine in the gas phase and liquid phase is sequentially maintained at a high pressure from a low pressure to low pressure by using the energy of the gas phase separated at high pressure The present invention relates to a treatment method and a device for treating ponies that can separate ponies into a gaseous phase and a liquid phase with high efficiency while heating the ponies flowing into the gas-liquid separator.

Due to changes in diet and westernization, meat consumption is increasing every year, and the number of livestock raising is increasing every year. Therefore, water pollution caused by livestock manure is serious. Among such livestock, the number of pigs raised is 13 times that of cattle, and the concentration of pollutants in manure is much higher than that of cows, which is the most serious water pollution problem due to pig manure.

Manure in pigs is easy to compost, but urine is difficult to compost due to its high water content and high concentrations of pollutants that cannot be easily processed by other methods. It adds to serious environmental pollution.

In view of this, there is a research on a method of treating pig urine by a biological treatment method, but there is a double problem that the wastewater treatment plant needs to be treated again because excessive amount of money is required for the installation of the treatment plant and the quality of the treated water is bad. Moreover, in the case of small-scale farmhouses and the like, there is a considerable difficulty due to the excessive cost for installing the above facilities.

The present invention is to solve this problem, an object of the present invention is to separate the urine into gaseous phase and concentrated phase, the gaseous phase is transformed into condensate harmless to the environment and discharged, the concentrated phase can be recycled as compost treatment method And a processing apparatus.

Another object of the present invention is a method and treatment of pig urine, which can effectively separate the pig urine into a gas phase and a concentrated phase while effectively saving the energy used by making the most of the latent heat of the gas phase and the liquid phase used during the transformation of the urine into the gas phase and the liquid phase. In providing a device.

Another object of the present invention is to maintain the pressure of the gas-liquid separator that separates the urine in the gas phase and liquid phase sequentially from high pressure to low pressure to heat the pig urine flowing into the gas-liquid separator maintained at low pressure by using the energy of the gas phase separated at high pressure The present invention provides a treatment method and a treatment device of pig urine that can separate pig urine into gaseous and liquid phase with high efficiency while using less energy.

1A and 1B are schematic diagrams showing an apparatus for treating urine according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

1: solid-liquid separator 2,21,22: transfer pump

3: storage of urine storage tank 4: preheater

5: first level tank 6: first heat exchanger

7: first gas-liquid separator 8: second-level tank

9: second heat exchanger 10: second gas-liquid separator

11: 3rd level tank 12: 3rd heat exchanger

13: 3rd gas-liquid separator 14: 2nd drain tank

15: first drain tank 16: condenser

17: vacuum pump 18: separation tank

19: deodorization tower

The basic concept of the present invention for achieving the above object is to use two or more gas-liquid separators in which the steam pressure is different, and to maintain the low-pressure steam energy sequentially contained in the gas phase of the separated urine heated by the high steam pressure It is to separate the gas phase and liquid phase by heating the liquid urine that is moved to the gas-liquid separator.

In the treatment method of the urine, the urine is supplied to the first heat exchanger and heated in contact with a heat source, and then separated into gaseous and liquid urine in the first gas-liquid separator, and the separated gaseous phase is condensed in a condenser and stored in a separation tank. Boiling process for releasing the purified liquid urine from the first gas-liquid separator; And supplying the liquid urine discharged from the first boiling process to the second heat exchanger and contacting it with a heat source for heating to separate the gaseous phase and the concentrated phase in the second gas-liquid separator, and using the separated gaseous phase as a heat source of the first heat exchanger. A second boiling process, which is then transferred to a first drain tank, and the separated concentrated phase is transferred to a concentrated urine storage tank,

The heat source of the second heat exchanger is supplied from the outside, the gaseous phase transferred to the first drain tank is condensed in the condenser and stored in the separation tank, characterized in that for transporting and storing the liquid phase of the first drain tank to the separation tank.

Preferably, the method further includes one or more boiling processes for separating the liquid urine released from the first boiling process between the first boiling process and the second boiling process in a heat exchanger and then separating the gaseous and liquid urine from the gas-liquid separator. In addition, the separated gaseous phase is used as a heat source of the heat exchanger used in the previous boiling process and then transferred to the second drain tank, and the separated liquid phase further includes a boiling process for heating by transferring to the heat exchanger of the next boiling process.

In addition, the pretreatment process is preferably carried out to separate the urine into solid and liquid urine before transporting the urine to the first heat exchanger to transfer and store the liquid urine in the urine storage tank, and to put a defoaming agent to prevent foaming in the urine The process further includes.

More preferably, the method may further include a deodorization process which flows into an upper portion of the condensate deodorization tower stored in the separation tank and injects air into the lower portion of the deodorization tower to contact the condensate with air to remove odors from the condensate.

In addition, the air pressure of the second gas-liquid separator and the first gas-liquid separator is preferably adjusted using a vacuum pump.

The structure of the device for treating urine as described above comprises a first gas-liquid separator for separating the liquid urine heated by the first heat exchanger and the first heat exchanger into gaseous and liquid urine, and a first A second heat exchanger for heating the liquid urine separated from the gas-liquid separator, a second gas-liquid separator for separating the liquid urine heated in the second heat exchanger into a gas phase and a concentrated phase, and a first heat exchanger separated from the second gas-liquid separator. A first drain tank for storing a gaseous phase used as a heat source of the condensate, a condenser condensing the gaseous phase separated from the first gas-liquid separator and a gaseous phase of the first drain tank with condensate, and a liquid condensed in the condenser and a liquid stored in the first drain tank. It consists of including a separation tank for storing the.

Preferably, a heat exchanger for heating the liquid urine separated by the first gas-liquid separator between the first gas-liquid separator and the second gas-liquid separator and a gas-liquid separator for separating the liquid urine heated in the heat exchanger into gaseous and liquid urine are sequentially. One or more more.

More preferably, further includes a vacuum pump for maintaining the air pressure of the gas-liquid separators used in the present invention, and a preheater for heating the urine supplied to the first heat exchanger using the liquid phase of the first drain tank.

In addition, it is preferable to further include a deodorizing tower for introducing the liquid phase stored in the separation tank to the upper side, injecting air to the lower side to contact the liquid phase and air to remove the smell of the liquid phase.

Hereinafter, with reference to the accompanying drawings will be described the configuration and operation based on the preferred embodiment of the present invention.

1A and 1B are schematic diagrams of a device for treating urine according to one embodiment of the present invention.

Referring to the drawings, when collecting urine is removed from the solid-liquid separator (1) using a net and a roller to remove the solids, such as hair, foreign matter or indigestible feed in the urine is separated firstly into liquid urine. Only the separated liquid urine is transferred to the urine storage tank (3) using a transfer pump (2). At this time, by installing the front and rear ends of the transfer pump (2) to separate the fine net foreign matter secondary.

Anti-foam is a defoamer to prevent bubbles from forming in urine as it not only releases a large amount of bubbles due to organic matters when evaporated in the internal evaporation tube of the multi-utility tube, but also releases them with water vapor. Input At this time, the antifoaming agent is introduced in the amount of 3 ~ 5ml / min per minute to the front end of the transfer pump (2) using a metering pump, and stirred while the liquid urine is transferred to the pig storage device. Alcohol-based, polypropylene-based, silicone-based and the like can be used as the antifoaming agent to be introduced, it is most preferred to use a silicone-based antifoaming agent.

A certain amount of liquid urine stored in the urine storage tank (3) is transferred to the first level tank (5) for storing a certain amount of urine through a preheater (4) equipped with multiple utility tubes. The multi-effect pipe of the preheater 4 uses, for example, Sirrer Evaporator, Natural Circulation Evaporator, Forced Evaporator, Falling Film Evaporator and the like. At this time, as a heat source of the preheater, a gaseous phase separated by a second gas-liquid separator described later is used, and liquid urine is brought into contact with the heat source in a countercurrent manner.

Liquid urine transferred to the first level tank (5) is heated to the first gas-liquid separator (7) after a certain amount is heated in the first heat exchanger (6), the liquid urine in the first heat exchanger (6) And the heat source are contacted in a countercurrent contact manner. At this time, the heat source used in the first heat exchanger 6 uses a gas phase separated from the second gas-liquid separator 10 described later.

The first gas-liquid separator 7 is adjusted to a low vacuum pressure to generate water vapor at 80 ° C. or lower, preferably about 60 ° C. to 80 ° C., and the liquid urine heated in the first heat exchanger 6 is the first gas liquid. When introduced into the separator 7 it is separated into gas phase and liquid phase. The gas phase separated in this way is condensed in the condenser 16 and stored in the separation tank 18, and the liquid urine passes through the first heat exchanger 6 again for a predetermined time and the gas phase and liquid phase in the first gas-liquid separator 7 Repeating the process, and after a certain time elapsed separated liquid urine is transferred to the second level tank (8) using a transfer pump (21).

The liquid urine transferred to the second level tank (8) is heated in the second heat exchanger (9) and then transferred to the second gas-liquid separator (10). The second heat exchanger (9) also supplies liquid urine and heat source. Heat to countercurrent contact. At this time, the heat source used is a gas phase separated from the third gas-liquid separator 13 described later.

The second gas-liquid separator 10 is adjusted to a low vacuum pressure to generate steam at 100 ° C. or lower, preferably 80 ° C. to 100 ° C., and the liquid urine heated in the second heat exchanger 9 is the second gas-liquid separator. When introduced into (10) it is separated into gas phase and liquid phase. The separated gaseous phase is used as a heat source of the first heat exchanger 6, and the liquid urine is separated into the gaseous phase and liquid phase from the second gas-liquid separator 10 via the second heat exchanger 9 for a predetermined time. Repeatedly, the liquid urine separated after a certain period of time is transferred to the third level tank 11 by using a transfer pump 22.

In addition, the liquid urine transferred to the third level tank 11 is heated in the third heat exchanger 12 and then transferred to the third gas-liquid separator 13, and the liquid urine and heat source is transferred to the third heat exchanger 12. Heat the liquid by making countercurrent contact. At this time, the heat source of the third heat exchanger 12 is supplied from the outside.

The urine in the liquid phase heated through the third heat exchanger 12 is separated into a gaseous phase and a concentrated phase when introduced into the third gas-liquid separator 13 whose air pressure is adjusted to generate water vapor at 100 ° C. or higher. The separated gaseous phase is used as a heat source of the second heat exchanger, and the concentrated phase is circulated through the third heat exchanger 12 and the third gas-liquid separator 13 for a predetermined time to separate the gaseous phase and the more concentrated concentrated phase, and the constant time. After this time, the concentrated phase is transferred to the concentrated urine storage tank 23 and recycled back to the compost.

The air pressure of the third, second and first gas-liquid separators 13, 10, and 7 used in the present invention is controlled by using the vacuum pump 17, and preferably the third, second and first gas-liquid separators ( 13, 10, and 7 are sequentially connected to adjust the pressure of the third gas-liquid separator 13, and then the pressure of the second air-pressure separator 10 is adjusted, and again, the pressure of the first gas-liquid separator 7 is adjusted. Ensure proper pressure is maintained.

Hereinafter, a flow of the gaseous phase separated in the third, second and first gas-liquid separators 13, 10, and 7 will be described. As described above, the gaseous phase separated in the third gas-liquid separator 13 is the second heat exchanger. The gaseous phase separated from the second gas-liquid separator 10 after being used as a heat source of the gas 9 is transferred to and stored in the second drain tank 14, and then used as a heat source of the first heat exchanger 6, and then the first drain. It is transferred to the tank 15 and stored. At this time, the gaseous phase remaining in the second drain tank 14 is used as a heat source of the first heat exchanger 6 together with the gaseous phase separated from the second gas-liquid separator 10, and the gaseous phase remaining in the first drain tank 15. Is condensed together with the gaseous phase separated from the first gas-liquid separator 7 and then stored in the separation tank 18.

In addition, after the liquid phase of the second drain tank 14 and the first drain tank 15 is used as a heat source of the preheater 4 for preheating the liquid urine transferred to the first level tank 5, the separation tank 18. Is transferred to and stored.

Condensed water condensed from the gas phase of the first gas-liquid separator 7, which is one of the mixed liquids stored in the separation tank 18 through the above process, contains a large amount of ammonia and thus has a very high TN and bad odor. NaOH) was added to adjust the pH to about 12, and then the odor was removed from the deodorization tower 19.

Deodorization tower 19 is filled with PVC hire pipe of about 4m in height, 30cm in diameter with 2 inch PE hirex as a filling material, and the mixed liquid stored in the separation tank 18 is introduced into the upper portion, and the air is injected into the lower portion of the mixed liquid. And air are in countercurrent contact. At this time, since the deodorizing effect is lowered when the temperature of the air is lowered, it is preferable to use deodorizing air of about 30 ° C. or more.

Condensate from which the ammonia odor is removed in the deodorization tower 19 is neutralized by adding sulfuric acid (H ₂ SO ₄ ) as a neutralizing agent and then discharged.

As described above, the gas-liquid treatment device of the present invention is described in detail by using three gas-liquid separators as an embodiment of the present invention.

In addition, one of ordinary skill in the art to which the present invention pertains may make various changes or modifications to the present invention without departing from the spirit and scope of the invention as defined in the appended claims. You will know. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

As described above, the present invention maintains the pressure of the gas-liquid separator that separates the urine in the gas phase and the liquid phase in order from the high pressure to the low pressure, and heats the urine that flows into the gas-liquid separator maintained at low pressure by using the energy of the gas phase separated at high pressure. It can separate the pig urine into gas phase and liquid phase with high efficiency while using less energy.

In addition, by removing impurities from the treated pig urine and removing the water vapor contained in the urine, the concentrate of the separated urine can be used for composting, and the separated steam can be released through a neutralization process to prevent environmental pollution.

In addition, by using the gas-liquid separator and deodorization tower to enable the recycling of the urine to discharge water and compost harmless to the environment, no separate process is required.

Claims (14)

After supplying the urine to the first heat exchanger and contacting it with a heat source for heating, the gas is separated into gaseous and liquid urine in the first gas-liquid separator, and the separated gaseous phase is condensed in a condenser and stored in a separation tank. A first boiling step of discharging the gas from the first gas-liquid separator; And The liquid urine released in the first boiling process is supplied to a second heat exchanger to be heated in contact with a heat source, and then separated into a gaseous phase and a concentrated phase in a second gas-liquid separator, and the separated gaseous phase is a heat source of the first heat exchanger. After using to transfer to the first drain tank, including the secondary boiling process for transferring the separated concentrated phase to the concentrated urine storage tank, The heat source of the second heat exchanger is supplied from the outside, the gaseous phase transferred to the first drain tank is condensed in the condenser and stored in the separation tank, and the liquid phase of the first drain tank is transferred to and stored in the separation tank. Method of treating urine, characterized in that. The urine of claim 1, further comprising a pretreatment step of separating the urine into solid urine and liquid urine and transporting and storing the liquid urine in a urine storage tank before supplying the urine to the first heat exchanger. Treatment method. The treatment method according to claim 1 or 2, further comprising a step of adding an antifoaming agent to prevent the generation of foam in the urine. The method of claim 1, wherein at least one boiling process for separating the liquid urine released in the first boiling process between the first boiling process and the second boiling process in a heat exchanger and then separated into a gaseous phase and liquid urine in a gas-liquid separator Further, wherein the separated gas phase is used as a heat source of the heat exchanger used in the previous boiling process and then transferred to the second drain tank, the separated liquid phase is further transferred to the heat exchanger of the next boiling process to heat the boiling process Method of treating pig urine, characterized in that it comprises. The deodorizing process of claim 1, further comprising a deodorizing step of introducing an upper portion of the condensate deodorization tower stored in the separation tank and injecting air into a lower portion of the deodorizing tower to contact the condensate with air to remove odors from the condensate. Method of treating urine, characterized in that. The method of claim 1, wherein a strong alkali compound is mixed with the condensate in the separation tank. The method of claim 1, wherein the pressure of the second gas-liquid separator and the first gas-liquid separator is controlled by using a vacuum pump. A first heat exchanger separating a first heat exchanger for heating pig urine and the liquid urine heated in the first heat exchanger into a gaseous phase and a liquid urine; A second heat exchanger for separating the liquid urine separated from the first gas-liquid separator and a second gas-liquid separator for separating the liquid urine heated in the second heat exchanger into a gas phase and a concentrated phase; A first drain tank which separates the second gas-liquid separator and stores the gas phase used as a heat source of the first heat exchanger; And A condenser for condensing the gaseous phase separated from the first gas-liquid separator and the gaseous phase of the first drain tank with condensate, and a separation tank for storing the liquid phase stored in the first drain tank and the condensed water condensed in the condenser. Treatment device of pig urine. 10. The method of claim 8, wherein between the first gas-liquid separator and the second gas-liquid separator, a heat exchanger for heating the liquid urine separated by the first gas-liquid separator and the liquid urine heated by the heat exchanger are gaseous and liquid urine. Device for treating urine, characterized in that it further comprises one or more sequentially separated gas-liquid separator. 10. The treatment device according to claim 8 or 9, further comprising a vacuum pump for maintaining the air pressure of the gas-liquid separators. 10. The treatment device according to claim 8 or 9, further comprising a level tank for supplying liquid urine in a constant amount to the heat exchanger. [9] The treatment device according to claim 8, further comprising a solid-liquid separation device for separating the urine supplied to the first heat exchanger into a solid component and a liquid phase, and a urine storage tank for storing the separated liquid urine. The treatment device according to claim 8, further comprising a preheater for heating the pig urine supplied to the first heat exchanger using the liquid phase of the first drain tank. The method of claim 8, further comprising a deodorizing tower for introducing a liquid phase stored in the separation tank to the top, injecting air to the bottom to contact the liquid and air to remove the smell of the liquid phase Processing unit.