A method for treating waste liquid

Abstract

The present invention relates to the field of waste liquid treatment technology, and in particular to a waste liquid treatment method. A waste liquid treatment method is implemented by a waste liquid treatment device, which includes a droplet output unit, a sterilization chamber, an ultraviolet emitting device, a heating device and a vaporization condensation unit. The droplet output unit is connected to the sterilization chamber, and the ultraviolet rays emitted by the ultraviolet emitting device can irradiate the sterilization chamber. The vaporization condensation unit is connected to the sterilization chamber; the waste liquid treatment method includes: using the droplet output unit to spray the waste liquid into the sterilization chamber in the form of multiple droplets; using the ultraviolet rays emitted by the ultraviolet emitting device to sterilize the waste liquid droplets in the sterilization chamber; using a heating device to heat the waste liquid in the sterilization chamber to partially boil and vaporize it to the vaporization condensation unit for collection; and discharging the waste liquid in the sterilization chamber. The present invention provides a waste liquid treatment method that can accelerate the efficiency of waste liquid treatment while removing bacteria from industrial wastewater without introducing new chemical components.

Description

Technical Field

[0001] The invention relates to the technical field of waste liquid treatment, and in particular to a waste liquid treatment method. Background Art

[0002] Industrial wastewater produced by chemical plants or pharmaceutical factories often has complex components and poor transparency. Some pollutants or toxic elements in industrial wastewater need to be removed before the wastewater is discharged. At the same time, fungi in industrial wastewater also need to be removed before the wastewater is discharged.

[0003] Existing sterilization technology utilizes chemical sterilization method, but the chemical sterilization method will introduce new chemical components, which will affect the subsequent removal of other polluting elements, and the process is complicated and inefficient.

[0004] Therefore, in view of the above problems, there is an urgent need for a waste liquid treatment method that can remove bacteria from industrial wastewater without introducing new chemical components and at the same time increase the efficiency of waste liquid treatment. Summary of the invention

[0005] The present invention provides a waste liquid treatment method, which can remove bacteria from industrial waste water without introducing new chemical components and improve the efficiency of waste liquid treatment. The technical solution of the present invention is as follows:

[0006] A waste liquid treatment method is implemented by a waste liquid treatment device, the waste liquid treatment device includes a droplet output unit, a sterilization chamber, an ultraviolet emitting device, a heating device and a vaporization condensation unit, the droplet output unit is connected to the sterilization chamber, the ultraviolet light emitted by the ultraviolet emitting device can irradiate the sterilization chamber, and the vaporization condensation unit is connected to the sterilization chamber;

[0007] A method for treating waste liquid, comprising:

[0008] The waste liquid is sprayed into the sterilization chamber in the form of multiple droplets using a droplet output unit;

[0009] sterilizing the waste liquid droplets in the sterilization chamber using ultraviolet rays emitted by an ultraviolet emitting device;

[0010] The waste liquid in the sterilization chamber is heated by a heating device to partially boil and vaporize the waste liquid and collect it in a vaporization and condensation unit;

[0011] The waste liquid in the sterilization chamber is discharged.

[0012] Preferably, the droplet output unit comprises a compression device and a first shower head.

[0013] Preferably, the droplet output unit comprises a plurality of first spray heads, and the first spray heads are installed on a side wall of the sterilization chamber near the top.

[0014] Preferably, the ultraviolet emitting device is installed on the bottom surface of the sterilization chamber;

[0015] The step of discharging the waste liquid in the sterilization chamber comprises:

[0016] When the height of the waste liquid in the sterilization chamber exceeds a preset height, part of the waste liquid is discharged to keep the liquid level in the sterilization chamber below the preset height.

[0017] Preferably, the ultraviolet emitting device is installed on the side of the sterilization chamber.

[0018] Preferably, the heating device is a microwave heating device.

[0019] Preferably, the vaporization and condensation unit comprises a vaporization chamber and a condensation pipe;

[0020] The vaporization chamber is located at the upper part of the sterilization chamber, the vaporization chamber and the sterilization chamber are separated by a partition, a connecting device is installed on the partition to make the vaporization chamber and the sterilization chamber communicate with each other, and the vaporization chamber is filled with a plurality of irregular polyhedrons;

[0021] The condensation pipe is located at the top of the vaporization chamber and is used to condense the vaporized gas and guide it to an external storage device;

[0022] The waste liquid treatment method also includes:

[0023] The waste liquid is guided to the top of the vaporization chamber so that the waste liquid wets the plurality of irregular polyhedrons and flows into the sterilization chamber through the partition.

[0024] Preferably, the connecting device includes an air duct and a spray pipe, the air duct inlet is installed on the partition, and the outlet is toward the inside of the vaporization chamber; the spray pipe inlet is installed on the partition, and the outlet is toward the sterilization chamber.

[0025] Preferably, a second spray head is installed at one end of the spray pipe extending into the sterilization chamber, and a baffle is installed at one end of the air duct extending into the vaporization chamber. The baffle and the air duct port are connected by a plurality of circumferentially distributed support columns. The baffle blocks the falling liquid, and the space between the baffle and the air duct port allows the gas in the sterilization chamber to enter the vaporization chamber.

[0026] Preferably, the portion of the partition where the spray pipe is arranged is recessed toward the sterilization chamber.

[0027] Compared with the prior art, the present invention has at least the following beneficial effects:

[0028] Ultraviolet sterilization has the characteristics of high efficiency and does not introduce new substances. However, ultraviolet sterilization is difficult to apply to large-scale industrial wastewater treatment. This is because the transparency of industrial wastewater is poor and it contains some solid impurities. Ultraviolet rays belong to short waves and have poor penetration. They cannot sterilize large volumes of water with poor transparency. In order to solve the above problems, the present application breaks up the industrial wastewater as a whole, and outputs the waste liquid in the form of droplets through a droplet output unit, with enough space between multiple dispersed droplets. At this time, an ultraviolet emitting device is used to emit ultraviolet rays to the droplet group. When the ultraviolet rays are irradiated on the droplets, a part of them will enter the droplets for sterilization. The ultraviolet rays after sterilization still have a certain intensity and continue to sterilize through the droplets. In addition, another part will be reflected and scattered when irradiated on the surface of the droplets, and irradiate other droplets with a higher intensity. As a result, ultraviolet rays can be reflected and scattered between droplets, and ultraviolet rays passing through the droplets can continue to be incident on the next droplet. Each droplet can be irradiated by multiple ultraviolet rays, so that sterilization is completed during the droplet falling process, and no new chemical components are introduced when removing bacteria in industrial wastewater. In addition, since ultraviolet sterilization can be completed in a shorter time, the efficiency of waste liquid treatment can be accelerated.

[0029] In order to further improve the efficiency of sewage and wastewater treatment, preliminary separation of waste liquid can be performed while ultraviolet sterilization is being performed. The waste liquid contains some solid impurities and microorganisms, and part of the liquid can be evaporated while ultraviolet sterilization is being performed. The evaporated liquid is obtained by condensation of gas. Therefore, the condensed liquid obtained is a pure liquid phase composed of volatile components such as water. Therefore, it can be further treated without filtering. The remaining waste liquid is a non-bacterial solid phase waste liquid, which may contain some heavy metal ions or other harmful substances. The harmful substances can be removed by precipitation with pharmaceutical agents. Since the liquid is sterile at this time, the wastewater can be further treated by biological sterilization using aerobic bacteria and / or anaerobic bacteria. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 is a flow chart of a waste liquid treatment method provided by an embodiment of the present invention;

[0032] Figure 2 It is a structural schematic diagram of a waste liquid treatment device provided by an embodiment of the present invention;

[0033] Figure 3It is a schematic structural diagram of an airway provided in an embodiment of the present invention.

[0034] In the figure:

[0035] 1- Sterilization room;

[0036] 2-First sprinkler head;

[0037] 3- Vaporization chamber;

[0038] 4-Condensation pipe;

[0039] 5-partition;

[0040] 6- irregular polyhedron;

[0041] 7-tracheal tube;

[0042] 8-Spray pipe;

[0043] 801-second sprinkler head;

[0044] 9- shutter;

[0045] 10-Support column. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0047] like Figures 1 to 3 As shown, an embodiment of the present invention provides a waste liquid treatment method, which is implemented by a waste liquid treatment device, wherein the waste liquid treatment device includes a liquid droplet output unit, a sterilization chamber 1, an ultraviolet emitting device, a heating device, and a vaporization condensation unit, wherein the liquid droplet output unit is connected to the sterilization chamber 1, the ultraviolet light emitted by the ultraviolet emitting device can irradiate the sterilization chamber 1, and the vaporization condensation unit is connected to the sterilization chamber 1;

[0048] A method for treating waste liquid, comprising:

[0049] The waste liquid is sprayed into the sterilization chamber 1 in the form of multiple droplets using a droplet output unit;

[0050] The waste liquid droplets in the sterilization chamber 1 are sterilized by ultraviolet rays emitted by the ultraviolet ray emitting device;

[0051] The waste liquid in the sterilization chamber 1 is heated by a heating device to partially boil and vaporize the waste liquid and collect it in a vaporization and condensation unit;

[0052] The waste liquid in the sterilization chamber 1 is discharged.

[0053] It should be noted that if sterilization treatment is not carried out in advance, bacteria in the wastewater, such as Escherichia coli, can destroy the living environment of aerobic bacteria and / or anaerobic bacteria in the subsequent biological sterilization method, squeeze their living space, and even metabolize substances that will change the pH value and reduce the effect of biological sterilization.

[0054] In some embodiments of the present invention, the droplet output unit includes a compression device and a first spray head 2 . After the compression device pressurizes the droplets, the pressurized droplets are sprayed out through the first spray head 2 .

[0055] In this embodiment, a large number of droplets can be sprayed out by using the cooperation of the compression device and the first spray head 2. The size of the droplets can be adjusted according to the pressure of the compression device and the spray aperture of the first spray head 2.

[0056] In some embodiments of the present invention, the droplet output unit includes a plurality of first spray heads 2 , and the first spray heads 2 are installed on a side wall of the sterilization chamber 1 near the top.

[0057] In this embodiment, the first spray heads 2 are distributed around the side wall of the sterilization chamber 1, so that the waste liquid output is larger and the droplets in the sterilization chamber 1 are distributed more evenly.

[0058] Since the overall shape of the droplet group sprayed by the first spray head 2 is similar to a trumpet shape, the positions of the first spray heads 2 can be arranged at staggered intervals to make the droplet distribution more uniform. Specifically, the large cross-sectional area of ​​the trumpet-shaped droplet group sprayed by one first spray head 2 is the small cross-sectional area of ​​the trumpet-shaped droplet group sprayed by another first spray head 2.

[0059] In some embodiments of the present invention, the ultraviolet emitting device is installed on the bottom surface of the sterilization chamber 1;

[0060] Discharge the waste liquid in the sterilization chamber 1, including:

[0061] When the waste liquid level in the sterilization chamber 1 exceeds a preset height, part of the waste liquid is discharged to keep the liquid level in the sterilization chamber 1 below the preset height.

[0062] In this embodiment, in order to further ensure the sterilization effect, an ultraviolet ray emitting device can be installed on the bottom of the sterilization chamber 1, and the sprayed droplets gather at the bottom of the sterilization chamber 1 to form a liquid layer, and the liquid layer can be sterilized by the ultraviolet rays emitted by the ultraviolet ray emitting device at the bottom. The preset height can be set according to the transparency of the waste liquid, and a higher preset height can be set for waste liquid with good transparency. In addition, the liquid discharged from the sterilization chamber 1 can be adjusted by a flow regulating device to keep the liquid level below the preset height. Specifically, an overflow port can be set at a preset height, and the overflow pipe can be used to discharge excess waste liquid, or a liquid extraction pipe can be set to extract and discharge liquid according to the liquid level.

[0063] In some embodiments of the present invention, the ultraviolet emitting device is installed on the side of the sterilization chamber 1.

[0064] In this embodiment, the ultraviolet ray emitting device can release ultraviolet rays from multiple sides simultaneously to sterilize the droplets in the falling process.

[0065] In some embodiments of the present invention, the heating device is a microwave heating device.

[0066] In this embodiment, the heating device is a microwave heating device, which can not only heat the liquid quickly and evenly, but also cooperate with ultraviolet rays to increase the sterilization effect.

[0067] In some embodiments of the present invention, the vaporization and condensation unit includes a vaporization chamber 3 and a condensation pipeline 4;

[0068] The vaporization chamber 3 is located at the upper part of the sterilization chamber 1. The vaporization chamber 3 and the sterilization chamber 1 are separated by a partition 5. A connecting device is installed on the partition 5 to connect the vaporization chamber 3 and the sterilization chamber 1. The vaporization chamber 3 is filled with a plurality of irregular polyhedrons 6.

[0069] The condensation pipe 4 is located at the top of the vaporization chamber 3 and is used to condense the vaporized gas and guide it to an external storage device;

[0070] The waste liquid treatment method further includes: guiding the waste liquid to the top of the vaporization chamber 3 so that the waste liquid soaks the plurality of irregular polyhedrons 6 and flows into the sterilization chamber 1 through the partition 5 .

[0071] In this embodiment, the waste liquid drips down from the upper part of the vaporization chamber 3 to increase the waste liquid treatment efficiency. At the same time, the waste liquid can soak the plurality of irregular polyhedrons 6, increase the evaporation area, and improve the vaporization efficiency. The waste liquid at the top of the vaporization chamber 3 can flow down through the connecting device on the partition 5 into the sterilization chamber 1 for sterilization. The waste liquid in the sterilization chamber 1 is vaporized under the action of the heating device, and can enter the vaporization chamber 3 and then be condensed and collected through the condensation pipe 4.

[0072] It should be noted that the waste liquid input into the upper part of the vaporization chamber 3 can be preheated to have a higher temperature to facilitate vaporization.

[0073] In some embodiments of the present invention, the connecting device includes an air guide pipe 7 and a spray pipe 8. The inlet of the air guide pipe 7 is installed on the partition 5, and the outlet is toward the inside of the vaporization chamber 3; the inlet of the spray pipe 8 is installed on the partition 5, and the outlet is toward the sterilization chamber 1. With this arrangement, the edge gas can go up and the liquid can go down.

[0074] In some embodiments of the present invention, a second spray head 801 is installed at one end of the spray pipe 8 extending to the sterilization chamber 1, and a baffle 9 is installed at one end of the air duct 7 extending to the vaporization chamber 3. The baffle 9 and the port of the air duct 7 are connected by a plurality of support columns 10 distributed in a circular pattern. The baffle 9 blocks the falling liquid, and the space between the baffle 9 and the port of the air duct 7 allows the gas in the sterilization chamber 1 to enter the vaporization chamber 3.

[0075] In this embodiment, the baffle 9 can prevent a large amount of liquid droplets from passing through the air duct 7, reducing the channel for the gas to rise. The liquid dripping onto the baffle 9 can be guided to the partition 5 through the support column 10, and then flow into the sterilization chamber 1 through the second spray head 801 of the spray pipe 8. At the same time, the gas in the sterilization chamber 1 can pass through the gap between the baffle 9 and the air duct 7 and enter the vaporization chamber 3.

[0076] In some embodiments of the present invention, the portion of the partition 5 where the spray pipe 8 is arranged is recessed toward the sterilization chamber 1. The recess can facilitate the gathering of liquid.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for treating waste liquid, characterized in that: The waste liquid treatment device is implemented by the waste liquid treatment device, which comprises a liquid drop output unit, a sterilization chamber (1), an ultraviolet emitting device, a heating device and a vaporization condensation unit, the liquid drop output unit is connected to the sterilization chamber (1), the ultraviolet light emitted by the ultraviolet emitting device can irradiate the sterilization chamber (1), and the vaporization condensation unit is connected to the sterilization chamber (1); Using a droplet output unit to spray the waste liquid into a sterilization chamber (1) in the form of a plurality of droplets; Using ultraviolet rays emitted by an ultraviolet emitting device to sterilize waste liquid droplets in the sterilization chamber (1); Using a heating device to heat the waste liquid in the sterilization chamber (1) so that part of it boils and vaporizes and is collected in a vaporization and condensation unit; Discharging waste liquid from the sterilization chamber (1); The vaporization and condensation unit comprises a vaporization chamber (3) and a condensation pipeline (4); The vaporization chamber (3) is located above the sterilization chamber (1), the vaporization chamber (3) and the sterilization chamber (1) are separated by a partition (5), a connecting device is installed on the partition (5) to enable the vaporization chamber (3) and the sterilization chamber (1) to communicate with each other, and the vaporization chamber (3) is filled with a plurality of irregular polyhedrons (6); The condensation pipe (4) is located at the top of the vaporization chamber (3) and is used to condense the vaporized gas and guide it to an external storage device; The waste liquid treatment method also includes: The waste liquid is guided to the top of the vaporization chamber (3) so that the waste liquid soaks the plurality of irregular polyhedrons (6) and flows through the partition (5) into the sterilization chamber (1).

2. A waste liquid treatment method according to claim 1, characterized in that: The liquid drop output unit comprises a compression device and a first spray head (2).

3. A waste liquid treatment method according to claim 2, characterized in that: The liquid drop output unit comprises a plurality of first spray heads (2), wherein the first spray heads (2) are installed on a side wall of the sterilization chamber (1) near the top.

4. A waste liquid treatment method according to claim 1, characterized in that: The ultraviolet emitting device is installed on the bottom surface of the sterilization chamber (1); The step of discharging the waste liquid in the sterilization chamber (1) comprises: When the height of the waste liquid in the sterilization chamber (1) exceeds a preset height, part of the waste liquid is discharged so that the liquid level in the sterilization chamber (1) is maintained below the preset height.

5. A waste liquid treatment method according to claim 1, characterized in that: The ultraviolet emitting device is installed on the side of the sterilization chamber (1).

6. A waste liquid treatment method according to claim 1, characterized in that: The heating device is a microwave heating device.

7. A waste liquid treatment method according to claim 1, characterized in that: The connecting device comprises an air guide pipe (7) and a spray pipe (8); the inlet of the air guide pipe (7) is mounted on the partition (5), and the outlet faces the interior of the vaporization chamber (3); the inlet of the spray pipe (8) is mounted on the partition (5), and the outlet faces the sterilization chamber (1).

8. A waste liquid treatment method according to claim 7, characterized in that: A second spray head (801) is installed at one end of the spray pipe (8) extending into the sterilization chamber (1), and a shield plate (9) is installed at one end of the air guide pipe (7) extending into the vaporization chamber (3). The shield plate (9) and the port of the air guide pipe (7) are connected via a plurality of support columns (10) distributed in a circumferential pattern. The shield plate (9) shields falling liquid, and the space between the shield plate (9) and the port of the air guide pipe (7) allows the gas in the sterilization chamber (1) to enter the vaporization chamber (3).

9. A waste liquid treatment method according to claim 7, characterized in that: The portion of the partition (5) where the spray pipe (8) is arranged is recessed towards the sterilization chamber (1).

Images