CN210973968U

CN210973968U - Freezing separator suitable for landfill leachate

Info

Publication number: CN210973968U
Application number: CN201921512909.XU
Authority: CN
Inventors: 刘大伟; 张凯
Original assignee: Hezhongsi Beijing Environmental Engineering Co ltd
Current assignee: Hezhongsi Beijing Environmental Engineering Co ltd
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-07-10
Anticipated expiration: 2029-09-11

Abstract

The utility model belongs to the technical field of energy saving and environmental protection, and discloses a freezing separation device suitable for landfill leachate, which comprises a landfill pond, wherein a filter screen is arranged at the lower end inside the landfill pond, a ground pipe is arranged inside the landfill pond and above the filter screen, a landfill layer is buried above the filter screen, the side wall of the ground pipe is connected with a first heat exchange pipe and a second heat exchange pipe, the first heat exchange pipe is arranged at one side of the second heat exchange pipe, the utility model changes the original straight pipe precooling into a spiral precooling pipe for precooling, the spiral precooling pipe can increase the contact area and the contact time of the leachate and cold air or cold water, can exchange heat fully in the time that the leachate passes through a secondary precooling regulating tank or a primary precooling regulating tank, improves the heat dissipation efficiency, and can achieve the best precooling effect in the shortest time, is not easy to be eliminated.

Description

Freezing separator suitable for landfill leachate

Technical Field

The utility model relates to an energy-concerving and environment-protective technical field, concretely relates to freeze separator suitable for landfill leachate.

Background

The landfill technology has become the first choice mode of most municipal refuse treatment at home and abroad because of its simple technology, the handling capacity is big, the expense is lower, leaching solution can produce a large amount at the leaching of precipitation and the seepage effect of surface water, groundwater after the landfill, contain a large amount of heavy metals in the leaching solution, ammonia nitrogen and various difficult degradation harmful and toxic substances, can not directly discharge into the municipal sewage pipe network, must handle, along with the acceleration of the urbanization process of china, the landfill yard is more and more, the leachate total amount that produces is also more and more big, the minimizing of leachate, innocent treatment become a problem of waiting for solution urgently.

In chinese patent with patent number CN201310413034.9, a freezing separation system suitable for landfill leachate is disclosed, in this patent, "leachate freezing separator separates leachate into pure water and concentrated solution which are easy to process, the treatment amount of leachate is greatly reduced, the treatment difficulty of leachate is reduced", but the precooling effect to leachate in this patent is good, the precooling effect when entering into the freezing separation tank is not easy to be achieved, increase of energy consumption is easy to be caused, in addition, a plurality of precooling routes are not provided, only one route passing through the precooling tank is provided in a comparison file, emergency cannot be dealt with, when a certain precooling tank cannot be used suddenly, then the treatment of the whole leachate cannot be continued, stop of a plant area is caused, and economic loss is large.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a freeze separator suitable for landfill leachate has solved among the current contrast file to the precooling inefficiency of filtration liquid, is difficult for reaching the problem of best precooling effect in the shortest time, in addition, does not set up many precooling routes, can't deal with emergency, easily causes the problem that the factory parkked.

(II) technical scheme

The utility model discloses a following technical scheme realizes: the utility model provides a freezing separation device suitable for landfill leachate, which comprises a landfill pool, wherein a filter screen is arranged at the lower end of the interior of the landfill pool, a ground pipe is arranged in the landfill pool and above the filter screen, the landfill layer is buried above the filter screen, the side wall of the ground pipe is connected with a first heat exchange pipe and a second heat exchange pipe, the first heat exchange pipe is arranged at one side of the second heat exchange pipe, one ends of the first heat exchange pipe and the second heat exchange pipe, which are far away from the ground pipe, are connected with a ground source heat pump system, the ground source heat pump system comprises a condenser, a compressor and an evaporator, which are connected in sequence through a pipeline, the bottom end of the landfill pool is connected with a main pipe, one end of the main pipe, which is far away from the landfill pool, is provided with a primary precooling adjusting pool, the improved high-temperature-resistant low-temperature-resistant low-temperature.

Preferably, the upper end of the side wall of the freezing separation tank is connected with an ice-water heat exchanger through a pipeline, the side wall of the ice-water heat exchanger is connected with a surface air cooler through a pipeline, the bottom end of the surface air cooler is connected with a liquid storage device through a pipeline, and the liquid storage device is in through connection with the ice-water heat exchanger through a pipeline.

Preferably, the outer surface walls of the cooling water pipe, the percolate inlet pipe, the first branch pipe, the second branch pipe and the main pipe are respectively provided with a flow regulating valve, and a throttling valve is arranged on a pipeline connected between the condenser and the evaporator.

Preferably, temperature sensors are mounted on the outer surface walls of the secondary precooling regulating tank and the primary precooling regulating tank, and the pipe diameters of the first spiral precooling pipe and the second spiral precooling pipe are smaller than the pipe diameter of the main pipe.

Preferably, the evaporation temperature range of the ground source heat pump system is-25 ℃ to-5 ℃, and the condensation temperature range is 15 ℃ to 50 ℃.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a to change the straight tube precooling originally into spiral precooling pipe and carry out the precooling, spiral precooling pipe can increase the area of contact and the contact time of filtration liquid and air conditioning or cold water, can pass the second grade precooling equalizing basin or the one-level precooling equalizing basin in the time full heat transfer, improves thermal efficiency of scattering and disappearing, can reach best precooling effect in the shortest time, is difficult for being eliminated.

(2) The utility model discloses will originally single precooling route increase change many precooling routes into, when the unable use of one-level precooling equalizing basin, filtration liquid accessible second branch pipe gets into the connecting pipe, the reentrant second grade precooling in the equalizing basin precooling can, when the unable use of second grade precooling equalizing basin, filtration liquid accessible is responsible for and gets into in the one-level precooling equalizing basin, then get into first branch pipe via connecting pipe and second branch pipe, get into at last in the freeze separation pond can, can effectively deal with emergency, the parking in factory has been prevented, economic loss has been avoided, the income has been improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the landfill layer of the present invention;

FIG. 3 is an external view of the primary precooling conditioning tank of the present invention;

in the figure: 1-a landfill pool, 2-a first heat exchange pipe, 3-a second heat exchange pipe, 4-a condenser, 5-a ground source heat pump system, 6-a compressor, 7-an evaporator, 8-a surface cooler, 9-a cooling water pipe, 10-a freezing separation pool, 11-a percolate inlet pipe, 12-a first branch pipe, 13-an ice water heat exchanger, 14-a liquid storage device, 15-a second-stage precooling adjusting pool, 16-a second spiral precooling pipe, 17-a connecting pipe, 18-a first-stage precooling adjusting pool, 19-a first spiral precooling pipe, 20-a second branch pipe, 21-a main pipe, 22-a filter screen, 23-a buried pipe, 24-a landfill layer and 25-a temperature sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1-3, the present invention provides the following technical solutions: a freezing separation device suitable for leachate in a refuse landfill comprises a refuse landfill pool 1, wherein a filter screen 22 is installed at the lower end inside the refuse landfill pool 1, a buried pipe 23 is installed inside the refuse landfill pool 1 and above the filter screen 22, the buried pipe 23 is made of an anticorrosive material capable of efficiently exchanging heat, a refuse landfill layer 24 is buried above the filter screen 22, a unit layering earthing and landfill mode is adopted in the refuse landfill process, a layer of loess is covered after a layer of refuse is accumulated, so that the refuse landfill layer 24 is formed, precipitation and leaching are carried out after the refuse landfill, leachate is generated under the seepage action of surface water and underground water, the leachate enters a main pipe 21 from the bottom end of the refuse landfill pool 1 and then can enter a precooling regulation pool, the side wall of the buried pipe 23 is connected with a first heat exchange pipe 2 and a second heat exchange pipe 3, the first heat exchange pipe 2 is located on one side of the second heat exchange pipe 3, one end of the first heat exchange tube 2 and one end of the second heat exchange tube 3, which are far away from the buried tube 23, are connected with a ground source heat pump system 5, the ground source heat pump system 5 comprises a condenser 4, a compressor 6 and an evaporator 7, the condenser 4, the compressor 6 and the evaporator 7 are sequentially connected through a pipeline, a refrigerant absorbs heat in the evaporator 7 at medium pressure, changes from liquid into superheated steam, is compressed into high-temperature high-pressure steam through the compressor 6, enters the condenser 4 for isobaric heat release and changes into supercooled liquid, is throttled by a throttle valve to become low-temperature low-pressure wet steam, continues to enter the evaporator 7 for isobaric heat absorption, and circulates in such a way, the refrigerant in the evaporator 7 absorbs the heat of the secondary refrigerant in the freezing water tube 21 to provide cold for the freezing separation tank 10, the refrigerant in the condenser 4 exchanges heat with the secondary refrigerant in the buried tube 23, and finally dissipates the, a primary precooling regulating tank 18 is arranged at one end of a main pipe 21 far away from a refuse landfill tank 1, a first spiral precooling pipe 19 is arranged in the primary precooling regulating tank 18, the upper end port of the first spiral precooling pipe 19 is connected with the main pipe 21, the lower end port of the first spiral precooling pipe 19 is connected with a connecting pipe 17, a secondary precooling regulating tank 15 is arranged at one end of the connecting pipe 17 far away from the primary precooling regulating tank 18, a second spiral precooling pipe 16 is arranged in the secondary precooling regulating tank 15, the first spiral precooling pipe 19 and the second spiral precooling pipe 16 can increase the contact area and the contact time of percolate and cold air or cold water, the heat exchange can be fully carried out in the time when the percolate passes through the secondary precooling regulating tank 15 or the primary precooling regulating tank 18, the heat dissipation efficiency is improved, the optimal precooling effect can be achieved in the shortest time and is not easy to be eliminated, the lower end port of the, a freezing separation tank 10 is arranged at one end of the percolate inlet pipe 11 far away from the secondary precooling adjusting tank 15, a cooling water pipe 9 is connected between the freezing separation tank 10 and the evaporator 7, a second branch pipe 20 is connected between the main pipe 21 and the connecting pipe 17, and a first branch pipe 12 is connected between the second branch pipe 20 and the lower end of the side wall of the freezing separation tank 10.

Furthermore, the upper end of the side wall of the freezing separation tank 10 is connected with an ice-water heat exchanger 13 through a pipeline, the side wall of the ice-water heat exchanger 13 is connected with a surface air cooler 8 through a pipeline, the bottom end of the surface air cooler 8 is connected with a liquid storage device 14 through a pipeline, the liquid storage device 14 is communicated with the ice-water heat exchanger 13 through a pipeline, pure ice blocks generated in the freezing separation tank 10 absorb heat of the secondary refrigerant in the ice-water heat exchanger 13 and are melted into pure water which is easy to process, the secondary refrigerant exchanges heat with air at the surface air cooler 8, the temperature is increased, the flow of the secondary refrigerant is adjusted through a flow adjusting valve, the temperature of the ice-water cooler 8 can be.

Furthermore, flow regulating valves are installed on the outer walls of the cooling water pipe 9, the percolate inlet pipe 11, the first branch pipe 12, the second branch pipe 20 and the main pipe 21, a throttling valve is installed on a pipeline connected between the condenser 4 and the evaporator 7, the flow regulating valves can effectively control the flow, the percolate can be conveniently treated, and the throttling valve can be used for reducing the medium pressure under the condition of extremely high pressure, so that the safety is improved.

Further, temperature sensors 25 are mounted on the outer surface walls of the secondary precooling regulating tank 15 and the primary precooling regulating tank 18, the pipe diameters of the first spiral precooling pipe 19 and the second spiral precooling pipe 16 are smaller than the pipe diameter of the main pipe 21, the temperature sensors 25 are electrically connected with a factory control system, and the temperatures in the secondary precooling regulating tank 15 and the primary precooling regulating tank 18 can be monitored in real time through the temperature sensors 25.

Furthermore, the evaporation temperature range of the ground source heat pump system 5 is-25 ℃ to-5 ℃, the condensation temperature range is 15 ℃ to 50 ℃, and the temperature set according to the actual situation is favorable for the freezing separation treatment of the percolate and improves the separation rate of harmful substances.

The utility model discloses a theory of operation and use flow: when the utility model is used, firstly, the garbage is buried in the garbage burying pool 1 by adopting a unit layered earth covering burying mode, so that a garbage burying layer 24 is formed, then precipitation leaching is carried out, meanwhile, leachate is generated under the seepage action of surface water and underground water, the leachate enters the main pipe 21 from the bottom end of the garbage burying pool 1 and then can enter the precooling adjusting pool, after precooling in the secondary precooling adjusting pool 15 and the primary precooling adjusting pool 18, the leachate enters the freezing separation pool 10, wherein, a cooling water pipe connected with the evaporator 7 provides cold for the freezing separation pool 10, pure ice blocks generated in the freezing separation pool 10 absorb the heat of the refrigerating medium in the ice water heat exchanger 13, the pure ice blocks are melted into pure water which is easy to treat, secondly, the refrigerating medium exchanges heat with air at the surface cooler 8, the temperature rises, the temperature of the refrigerating medium can be controlled by the flow quantity of the refrigerating medium through the flow regulating valve, in addition, the first spiral pre-cooling pipe 19 and the second spiral pre-cooling pipe 16 can increase the contact area of the percolate and cold water or cold air, heat exchange can be fully performed in unit time when the percolate passes through the primary pre-cooling regulating tank 18 or the secondary pre-cooling regulating tank 15, the heat dissipation efficiency is improved, the self temperature is reduced, the best pre-cooling effect can be achieved in the shortest time, in addition, the refrigerant in the condenser 4 exchanges heat with the coolant in the buried pipe 23, the heat is finally dissipated into the landfill layer 24, and the extraction of the percolate is improved.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.

Claims

1. The utility model provides a freeze separator suitable for landfill leachate which characterized in that: comprises a refuse landfill pool (1), a filter screen (22) is installed at the inner lower end of the refuse landfill pool (1), a buried pipe (23) is installed inside the refuse landfill pool (1) and above the filter screen (22), a refuse landfill layer (24) is buried above the filter screen (22), the side wall of the buried pipe (23) is connected with a first heat exchange pipe (2) and a second heat exchange pipe (3), the first heat exchange pipe (2) is arranged at one side of the second heat exchange pipe (3), one end of the first heat exchange pipe (2) and one end of the second heat exchange pipe (3) far away from the buried pipe (23) are connected with a ground source heat pump system (5), the ground source heat pump system (5) comprises a condenser (4), a compressor (6) and an evaporator (7), and the condenser (4), the compressor (6) and the evaporator (7) are sequentially connected through a pipeline, the bottom end of the refuse landfill pool (1) is connected with a main pipe (21), one end of the main pipe (21) far away from the refuse landfill pool (1) is provided with a primary precooling regulating pool (18), a first spiral precooling pipe (19) is arranged inside the primary precooling regulating pool (18), the upper end port of the first spiral precooling pipe (19) is connected with the main pipe (21), the lower end port of the first spiral precooling pipe (19) is connected with a connecting pipe (17), one end of the connecting pipe (17) far away from the primary precooling regulating pool (18) is provided with a secondary precooling regulating pool (15), the inside of the secondary precooling regulating pool (15) is provided with a second spiral precooling pipe (16), the lower end port of the second spiral precooling pipe (16) is connected with a percolate inlet pipe (11), one end of the percolate inlet pipe (11) far away from the secondary precooling regulating pool (15) is provided with a freezing separation pool, be connected with cooling water pipe (9) between freezing separation tank (10) and evaporimeter (7), be connected with second branch pipe (20) between being responsible for (21) and connecting pipe (17), be connected with first branch pipe (12) between the lateral wall lower extreme of second branch pipe (20) and freezing separation tank (10).

2. The cryogenic separation device for landfill leachate according to claim 1, wherein the cryogenic separation device comprises: the freezing separation tank is characterized in that the upper end of the side wall of the freezing separation tank (10) is connected with an ice water heat exchanger (13) through a pipeline, the side wall of the ice water heat exchanger (13) is connected with a surface air cooler (8) through a pipeline, the bottom end of the surface air cooler (8) is connected with a liquid storage device (14) through a pipeline, and the liquid storage device (14) is communicated with the ice water heat exchanger (13) through a pipeline.

3. The cryogenic separation device for landfill leachate according to claim 1, wherein the cryogenic separation device comprises: flow control valve is all installed to the exterior wall that cooling water pipe (9), filtration liquid advance pipe (11), first branch pipe (12), second branch pipe (20) and are responsible for (21), install the choke valve on the pipeline of connecting between condenser (4) and evaporimeter (7).

4. The cryogenic separation device for landfill leachate according to claim 1, wherein the cryogenic separation device comprises: temperature sensors (25) are mounted on the outer surface walls of the secondary precooling regulating pool (15) and the primary precooling regulating pool (18), and the pipe diameters of the first spiral precooling pipe (19) and the second spiral precooling pipe (16) are smaller than that of the main pipe (21).

5. The cryogenic separation device for landfill leachate according to claim 1, wherein the cryogenic separation device comprises: the evaporation temperature range of the ground source heat pump system (5) is-25 ℃ to-5 ℃, and the condensation temperature range is 15 ℃ to 50 ℃.