CN215975374U

CN215975374U - Pressure-reducing concentration tank and reverse osmosis treatment system comprising same

Info

Publication number: CN215975374U
Application number: CN202121359158.XU
Authority: CN
Inventors: 叶素霞; 郑佳; 蒋建龙; 陈坚; 章旭钢; 孙超; 汤文静
Original assignee: Hangzhou Kangnuo Environment Technology Engineering Co ltd
Current assignee: Hangzhou Kangnuo Environment Technology Engineering Co ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-03-08
Anticipated expiration: 2031-06-18

Abstract

The utility model belongs to the technical field of landfill leachate treatment, and particularly relates to a reduced-pressure concentration tank and a reverse osmosis treatment system comprising the reduced-pressure concentration tank. Concentrated jar of decompression, including a jar body, the periphery cover of jar body is equipped with and presss from both sides the cover, presss from both sides the cover and is equipped with into mouth, outlet flue, presss from both sides the interior side of keeping away from a jar body and is equipped with the guide plate, and the guide plate extends to the bottom that presss from both sides the cover from the position that is higher than into mouth, and the windward side of guide plate is the acute angle with flue gas flow direction's contained angle, presss from both sides the cover and corresponds in the bottom downside department of guide plate and is equipped with the row cinder notch. The pressure-reducing concentration tank provided by the utility model can heat and concentrate the waste water in the tank body by the high-temperature flue gas generated by incineration, and the pollutants in the flue gas are guided to the bottom position of the jacket by the guide plate through the arrangement of the guide plate, are finally gathered and are discharged from the slag discharge port, so that the effect of purifying the pollutants in the flue gas is achieved, and the heat recovery of the flue gas is facilitated.

Description

Pressure-reducing concentration tank and reverse osmosis treatment system comprising same

Technical Field

The utility model belongs to the technical field of landfill leachate treatment, and particularly relates to a reduced-pressure concentration tank and a reverse osmosis treatment system comprising the reduced-pressure concentration tank.

Background

The landfill leachate is organic wastewater which is formed by deducting the saturated water holding capacity of garbage and a soil covering layer from water contained in the garbage in a garbage landfill, rain, snow and water entering the landfill and other water and passing through the garbage layer and the soil covering layer.

During the combustion of waste, many different chemical reactions occur during incineration due to the complexity and heterogeneity of the constituents of the waste. Depending on the degree of contamination, it can be classified into particulate matter, acid gases, heavy metals and organic pollutants. These substances are harmful to the environment to various degrees, and therefore the flue gas generated by the incineration of garbage is a main source of pollutants generated by the incineration of garbage.

The physical and chemical method for treating the landfill leachate is an effective treatment mode, the traditional methods comprise a flocculation precipitation treatment method, an activated carbon adsorption treatment method and the like, and the treated wastewater still has a large amount of harmful substances, but has a low concentration and cannot be effectively further removed. The waste water concentration treatment is an effective step for removing pollutants in waste water, the waste water concentration process needs to be heated, the traditional heating method mostly adopts hot steam for heating, the hot steam is obtained after flue gas heat exchange, a large amount of solid particles are contained in the flue gas in the heat exchange process, the heat exchanger is extremely easy to block, the heat exchange quantity can not be ensured, and a plurality of times of heat exchange can also cause the loss of part of heat, so that the waste water concentration treatment is not beneficial to energy conservation and emission reduction.

Disclosure of Invention

In order to solve the above problems, the present invention provides a reduced pressure concentration tank and a reverse osmosis treatment system including the reduced pressure concentration tank.

The technical scheme adopted by the utility model is as follows: the decompression concentration tank comprises a tank body, a jacket is covered on the periphery of the tank body, a smoke inlet is arranged on the lower side of the jacket, a smoke outlet is arranged on the upper side of the jacket, a guide plate is arranged on one side surface, away from the tank body, in the jacket, the guide plate extends to the bottom of the jacket from a position higher than the smoke inlet, the windward surface of the guide plate is acute-angled with the included angle of the smoke flowing direction, and a slag discharge port is correspondingly arranged at the lower side of the bottom end of the guide plate of the jacket.

Furthermore, a wind shield is arranged on one side surface, far away from the tank body, in the jacket, and the wind shield is positioned on the upper side of the slag discharging port and used for shielding wind for the slag discharging port.

Furthermore, an air guide plate is arranged on one side surface, far away from the tank body, in the jacket, one end of the air guide plate is arranged on the upper side of the smoke inlet, and the other end of the air guide plate extends upwards to the lower side of the smoke outlet.

Furthermore, the heights of the guide plate, the wind shield and the induced draft plate in the direction vertical to the central axis of the tank body do not exceed 1/2 of the thickness of the inner cavity of the jacket.

Furthermore, the axis of the smoke inlet is arranged along the tangent line of the cavity in the jacket, so that smoke is blown into the jacket in the tangential direction of the jacket to generate rotary airflow in the jacket.

Further, jar body top is provided with drive assembly, the drive assembly drive is connected with the one end of pivot, the other end of pivot extends to jar internal portion bottom side, be provided with the stirring rake in the pivot.

Furthermore, a defoamer is further arranged on the rotating shaft and positioned in the tank body and above the jacket.

Furthermore, the top of the tank body is provided with a steam outlet, and the steam outlet is positioned above the defoamer.

Furthermore, the steam exhaust port is connected with the input end of a vacuum pump, and the output end of the vacuum pump is connected with a gas-liquid separator.

The utility model also provides a landfill leachate STRO pipe network type reverse osmosis treatment system, which comprises the reduced pressure concentration tank and a leachate tank, wherein the leachate tank is sequentially connected with a wastewater pool, a primary sedimentation tank, a secondary sedimentation tank, the reduced pressure concentration tank, a tubular microfiltration membrane and the STRO.

The utility model has the following beneficial effects:

1. the pressure-reducing concentration tank provided by the utility model can heat and concentrate the waste water in the tank body by the high-temperature flue gas generated by incineration, and the pollutants in the flue gas are guided to the bottom position of the jacket by the guide plate through the arrangement of the guide plate, are finally gathered and are discharged from the slag discharge port, so that the effect of purifying the pollutants in the flue gas is achieved, and the heat recovery of the flue gas is facilitated.

2. The flue gas contacted with the surface of the tank body is always higher-temperature flue gas under the action of centrifugal force, so that the waste water in the tank body can be quickly heated and quickly boiled and concentrated.

Drawings

FIG. 1 is a schematic front view of a vacuum concentration tank according to the present invention;

FIG. 2 is a schematic cross-sectional view of a vacuum concentration tank according to the present invention;

FIG. 3 is a schematic view of the structure of a jacket according to the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a flow chart of a landfill leachate STRO pipe network type reverse osmosis treatment system.

The reference numbers are as follows: 1-frame body, 2-smoke inlet, 3-jacket, 4-tank body, 5-lens, 6-water inlet, 7-rotating wheel, 8-vacuum pump, 9-gas-liquid separator, 10-steam outlet, 11-smoke outlet, 12-slag outlet, 13-water outlet, 14-stirring paddle, 15-rotating shaft, 16-defoamer, 17-wind shield, 18-guide plate and 19-induced air plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

Example 1

As shown in fig. 1-4, the pressure-reducing concentration tank includes a tank body 4, the tank body 4 is fixedly disposed on a frame body 1, a jacket 3 is covered on the periphery of the tank body 4, a smoke inlet 2 is disposed on the lower side of the jacket 3, a smoke outlet 11 is disposed on the upper side of the jacket, a guide plate 18 is disposed on a side surface of the jacket 3 away from the tank body 4, the guide plate 18 extends to the bottom of the jacket 3 from a position higher than the smoke inlet 2, the guide plate 18 is disposed in an inclined manner, an acute angle is formed between a windward surface of the guide plate 18 and a smoke flowing direction, and a slag discharge port 12 is correspondingly disposed at the lower side of the bottom end of the guide plate 18 of the jacket 3.

According to the structure, the guide plate 18 is arranged at the position corresponding to the smoke inlet 2, and the included angle between the windward side of the guide plate 18 and the smoke flowing direction is an acute angle, namely the guide plate 18 is obliquely arranged. Because the jacket 3 is covered on the periphery of the tank 4, and the cavity in the jacket 3 is annular, when high-temperature flue gas (with a temperature above 800 ℃) is introduced into the flue gas inlet 2, the flue gas can flow along the cavity in the jacket 3, namely, the flue gas can revolve around the central axis of the tank 4, the flue gas generates a centrifugal force in the revolution process, main pollutants in the flue gas are acid gaseous pollutants, products of incomplete combustion, particle pollutants and volatile heavy metal pollutants, under the action of the centrifugal force, the products of incomplete combustion, the particle pollutants and the heavy metal pollutants mainly revolve around one side surface far away from the tank 4 in the jacket 3, and at the moment, the pollutants are under the action of the guide plate 18 arranged on one side surface far away from the tank 4 in the jacket 3, so that the pollutants are guided to the bottom position of the jacket 3 by the guide plate 18 and are finally gathered, is discharged from the slag discharge port 12, thereby playing a role in purifying pollutants in the flue gas and being beneficial to heat exchange and heat recovery of the flue gas again. When the flue gas revolves around the axis of the tank body 4 along the cavity in the jacket 3, the flow velocity of the flue gas is controlled, so that the temperature of the flue gas is always above 800 ℃, and because the temperature of the flue gas is higher, the temperature of the waste water in the tank body 4 is lower, the flue gas can exchange heat with the waste water, so that the temperature of the waste water can be increased, and the temperature of the flue gas is reduced. The flue gas density after the cooling can increase, and the flue gas after the cooling can be under the effect of centrifugal force, and near the revolution motion of a side of keeping away from jar body 4 in the cover 3 for the flue gas with jar body 4 surface contact is the high temperature flue gas all the time, thereby makes the waste water in the jar body 4 can be heated fast, the boiling is concentrated fast.

As shown in fig. 3 and 4, as a preferable scheme, a wind shield 17 is arranged on one side surface away from the tank 4 in the jacket 3, and the wind shield 17 is positioned on the upper side of the slag discharging port 12 and used for shielding wind for the slag discharging port 12.

As shown in fig. 3 and 4, preferably, an air guide plate 19 is disposed on a side surface of the jacket 3 away from the can 4, one end of the air guide plate 19 is disposed on the upper side of the smoke inlet 2, and the other end extends upward to the lower side of the smoke outlet 11. The induced draft plate 19 is spiral, so that the smoke can not directly be discharged from the smoke outlet 11 after entering from the smoke inlet 2 to a certain extent, but the smoke enters from the smoke inlet 2 and revolves around the tank body 4 and then is discharged from the smoke outlet 11, and the effect of increasing the heat transfer effect is achieved.

As shown in fig. 3 and 4, the heights of the deflector 18, the wind screen 17 and the induced draft plate 19 in the direction perpendicular to the central axis of the tank 4 preferably do not exceed 1/2 of the thickness of the cavity inside the jacket 3, so that smoke can be normally discharged from the smoke outlet 11 without blockage. The utility model can be provided with a plurality of groups of guide plates 18, wind shields 17, induced draft plates 19 and slag outlets 12. It is further noted that the material of the air deflector 18, the air deflector 17 and the air guide plate 19 is preferably made of a high temperature resistant polymer material, and transition metals such as copper and iron cannot be selected, otherwise dioxin may be generated.

As shown in fig. 4, it is preferable that the axis of the smoke inlet 2 is arranged along the tangent of the jacket 3, and the smoke is blown into the jacket 3 in the tangential direction of the jacket 3 to generate a rotating air flow in the jacket 3. The axes of the smoke outlets 11 are also preferably arranged along the tangent of the jacket 3 and opposite to the axes of the smoke inlets 2, i.e. one is tangent in the clockwise direction and the other is tangent in the counterclockwise direction, so as to facilitate the rapid discharge of smoke from the smoke outlets 11.

Example 2

On the basis of the embodiment 1, as shown in fig. 1 and fig. 2, as a preferable scheme, a driving assembly is arranged at the top end of the tank 4, the driving assembly is connected with one end of a rotating shaft 15 in a driving manner, the other end of the rotating shaft 15 extends to the bottom side inside the tank 4, a stirring paddle 14 is arranged on the rotating shaft 15, and the stirring paddle 14 is used for stirring the wastewater and is beneficial to heat transfer. The driving component selected in the utility model is a motor belt connected with the rotating wheel 17, the rotating wheel 17 is driven to rotate by the motor, and the rotating wheel 17 drives the rotating shaft 15 to rotate.

As shown in fig. 2, a defoamer 16 is preferably further disposed on the rotating shaft 15, and the defoamer 16 is located above the jacket 3. Namely, the height of the waste water is higher than that of the jacket 3, which is beneficial to the effective heat exchange of the waste water.

As shown in fig. 1, it is preferable that the top of the tank 4 is provided with a steam outlet 10, and the steam outlet 10 is located above the defoamer 16. The steam exhaust port 10 is connected with the input end of a vacuum pump 8, the output end of the vacuum pump 8 is connected with a gas-liquid separator 9, the vacuum pump 8 reduces the pressure in the tank body 4, the boiling concentration of the waste water is facilitated, the vacuum pump 8 timely extracts steam from the tank body 4, and the obtained steam enters the gas-liquid separator 9 to be subjected to gas-liquid separation and then is discharged.

As shown in fig. 1 and 2, the tank 4 preferably has a water inlet 6 at the top and a water outlet 13 at the bottom. The tank 4 is also provided with a lens 5.

In the working state of the present invention, in combination with the above, when the present invention works, the waste water enters from the water inlet 6 until the height of the waste water is slightly lower than the height of the defoamer 16, so that the driving assembly drives the rotating shaft 15 to rotate, the rotating shaft 15 rotates to drive the defoamer 16 and the stirring paddle 14 to revolve, and the vacuum pump 8 and the gas-liquid separator 9 are started. The flue gas is introduced from the flue gas inlet 2 and discharged from the flue gas outlet 11, namely the flue gas is introduced into the jacket 3 for heat exchange, the waste water is continuously boiled and concentrated in the process, and the generated steam is discharged after being pumped out by the vacuum pump 8 and separated by the gas-liquid separator 9. After the concentration is finished, the vacuum pump 8 and the gas-liquid separator 9 are closed, the water outlet 13 is opened to discharge the concentrated wastewater, and the slag discharging port is opened to collect solid pollutants in the flue gas.

Example 3

In addition to example 1, as shown in fig. 1 to 5, as a preferred embodiment, the present invention further provides a landfill leachate STRO pipe network type reverse osmosis treatment system, which comprises a leachate tank, wherein the leachate tank is sequentially connected with a wastewater tank, a primary sedimentation tank, a secondary sedimentation tank, the above-mentioned reduced pressure concentration tank, a pipe type microfiltration membrane and STRO. The leachate is pumped into a wastewater tank and then enters a primary sedimentation tank and a secondary sedimentation tank to be added with drugs for sedimentation, and pollutants in the wastewater are removed mainly by using physical and chemical principles, so that the traditional chemical sedimentation method is not described too much. And pumping supernatant of the precipitated wastewater into a water inlet 6 in a reduced pressure concentration tank, allowing the concentrated wastewater to enter a tubular microfiltration membrane for solid-liquid separation, pumping the wastewater filtered by the tubular microfiltration membrane into a STRO, mixing the obtained concentrated water with sludge in a sedimentation tank, concentrating the mixed concentrated water and sludge in the sedimentation tank, and incinerating the concentrated water again. The wastewater is deeply desalted through a high-pressure membrane, the desalted wastewater is preferably further treated through a reverse osmosis membrane (RO), the treated wastewater meets the discharge requirement and is discharged, and the concentrated water obtained through treatment flows back to the STRO.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and those skilled in the art should make various changes, modifications, alterations, and substitutions on the technical solution of the present invention without departing from the spirit of the present invention, which falls within the protection scope defined by the claims of the present invention.

Claims

1. The decompression concentration tank is characterized by comprising a tank body (4), a jacket (3) is covered on the periphery of the tank body (4), a smoke inlet (2) is arranged on the lower side of the jacket (3), a smoke outlet (11) is arranged on the upper side of the jacket, a guide plate (18) is arranged on one side surface, away from the tank body (4), in the jacket (3), the guide plate (18) extends to the bottom of the jacket (3) from a position higher than the smoke inlet (2), the windward side of the guide plate (18) forms an acute angle with the included angle of the smoke flowing direction, and a slag discharge port (12) is correspondingly arranged at the lower side of the bottom of the guide plate (18) of the jacket (3).

2. The decompression concentration tank according to claim 1, wherein a wind shield (17) is arranged on one side surface of the jacket (3) far away from the tank body (4), and the wind shield (17) is positioned on the upper side of the slag discharge port (12).

3. The reduced pressure concentration tank according to claim 2, wherein an air guide plate (19) is arranged on one side surface of the jacket (3) far away from the tank body (4), one end of the air guide plate (19) is arranged on the upper side of the smoke inlet (2), and the other end of the air guide plate extends upwards to the lower side of the smoke outlet (11).

4. The reduced-pressure concentration tank according to claim 3, wherein the heights of the guide plate (18), the wind shield (17) and the induced draft plate (19) in the direction perpendicular to the central axis of the tank body (4) do not exceed 1/2 of the thickness of the inner cavity of the jacket (3).

5. The reduced-pressure concentration tank according to claim 1, wherein the axis of the smoke inlet (2) is arranged along the tangent of the inner cavity of the jacket (3), so that smoke is blown into the jacket (3) in the tangential direction of the jacket (3) to generate a rotating airflow in the jacket (3).

6. The decompression concentration tank according to any one of claims 1 to 5, wherein the top end of the tank body (4) is provided with a driving assembly, the driving assembly is connected with one end of a rotating shaft (15) in a driving manner, the other end of the rotating shaft (15) extends to the bottom side inside the tank body (4), and the rotating shaft (15) is provided with a stirring paddle (14).

7. The reduced pressure concentration tank according to claim 6, wherein a defoamer (16) is further disposed on the rotating shaft (15), and the defoamer (16) is located inside the tank body (4) and above the jacket (3).

8. The reduced pressure concentration tank according to claim 7, wherein the top of the tank body (4) is provided with a steam outlet (10), and the steam outlet (10) is positioned above the defoamer (16).

9. The vacuum concentration tank according to claim 8, wherein the steam outlet (10) is connected with an input end of a vacuum pump (8), and an output end of the vacuum pump (8) is connected with a gas-liquid separator (9).

10. A reverse osmosis treatment system comprising the reduced pressure concentration tank according to any one of claims 1 to 9, and further comprising a permeate tank, wherein the permeate tank is connected in sequence with a wastewater tank, a primary sedimentation tank, a secondary sedimentation tank, the reduced pressure concentration tank, a tubular microfiltration membrane and STRO.