Waste emulsion treatment system

Abstract

The utility model relates to the technical field of waste liquid treatment, and particularly discloses a waste emulsion treatment system which comprises a waste emulsion tank, a first filter press, a heating device, an evaporator, a temporary storage tank, a filtering device, a salting-out reaction tank, a composite salt tank, a second filter press, an oil-water separator and an oil storage tank which are connected in sequence, the first filter press is used for carrying out filter pressing on the waste emulsion, the heating device is used for heating mother liquor obtained after filter pressing, the evaporator is used for carrying out evaporation concentration on the heated mother liquor and conveying concentrated liquor to the temporary storage tank, and the filtering device is used for filtering the concentrated liquor and conveying the filtered solution to the salting-out reaction tank; the composite salt tank conveys composite salt to the salting-out reaction tank, the salting-out reaction tank performs salting-out reaction on the filtered solution, the second filter press performs filter pressing on the salted-out solution, and the oil-water separator performs oil-water separation on the filter-pressed solution. The water-containing mineral oil can be obtained through treatment, and the reutilization rate of resources is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste liquid treatment, in particular to a treatment system for waste emulsion. Background Art

[0002] Emulsion is a high-performance semi-synthetic metalworking fluid, particularly suitable for machining aluminum and its alloys. Waste emulsion after machining contains a lot of impurities, making it difficult to handle.

[0003] In the prior art, there is a lack of a treatment system for waste emulsion, which results in the waste emulsion containing usable substances, such as mineral oil and other resources being wasted. Utility Model Content

[0004] The utility model provides a waste emulsion processing system, which can obtain water-containing mineral oil through processing, thereby improving the recycling rate of resources.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] An embodiment of the present utility model provides a waste emulsion treatment system, comprising a waste emulsion tank, a first filter press, a heating device, an evaporator, a temporary storage tank, a filtering device, a salting-out reaction tank, a compound salt tank, a second filter press, an oil-water separator and an oil storage tank connected in sequence; the first filter press is used to filter the waste emulsion, the heating device is used to heat the mother liquor filtered out, the evaporator is used to evaporate and concentrate the heated mother liquor and transport the concentrated liquid to the temporary storage tank, the filtering device is used to filter the concentrated liquid and transport the filtered solution to the salting-out reaction tank, the compound salt tank is used to transport compound salt to the salting-out reaction tank, the salting-out reaction tank is used to perform salting-out reaction on the filtered solution, the second filter press is used to filter the salted-out solution, the oil-water separator is used to separate oil and water from the filtered solution and transport the separated aqueous mineral oil to the oil storage tank.

[0007] In some embodiments, the filtration device includes a first ultrafiltration device and a second ultrafiltration device, the inlet end of the first ultrafiltration device is connected to the temporary storage tank, the outlet end of the first ultrafiltration device is connected to the salting-out reaction tank, the first ultrafiltration device is also connected to the inlet end of the second ultrafiltration device to transport the filtered mother liquor to the second ultrafiltration device, and the outlet end of the second ultrafiltration device is connected to the salting-out reaction tank.

[0008] In some embodiments, an ultrafiltration collection tank is further included, which is connected to the second ultrafiltration device to collect the filtered mother liquid.

[0009] In some embodiments, a wastewater collection tank is further included, which is connected to the oil-water separator to collect wastewater generated by the oil-water separator.

[0010] In some embodiments, an exhaust gas treatment system is further included, wherein the exhaust gas treatment system is connected to the oil-water separator to treat the gas in the oil-water separator.

[0011] In some embodiments, the exhaust gas treatment system includes a UV photolysis device and an activated carbon adsorption tower.

[0012] In some embodiments, an oil residue collection tank is further included, which is connected to the second filter press to collect the oil residue filtered out.

[0013] In some embodiments, the heating device includes a heat exchanger, a hot water inlet pipe, a cold water outlet pipe, a circulation pump and a condenser. The heat exchanger includes two heat exchange channels for heat exchange, wherein the two ends of one heat exchange channel are respectively connected to the first filter press and the evaporator, and one end of the other heat exchange channel, the cold water outlet pipe, the condenser, the hot water inlet pipe and the other end of the other heat exchange channel are connected in sequence, and a circulation pump is provided in the cold water outlet pipe.

[0014] In some embodiments, the evaporator is further connected to a condenser so as to transport the steam generated during the evaporation process to the condenser and heat the water in the hot water inlet pipe.

[0015] The present invention has at least the following beneficial effects: the first filter press of the present invention filters the waste emulsion to remove large impurities, the heating device heats the mother liquor filtered out for subsequent processing, the evaporator is used to evaporate and concentrate the heated mother liquor and transport the concentrated liquid to a temporary storage tank, the filtering device is used to filter the concentrated liquid to further remove impurities in the solution, the filtered solution is transported to a salting-out reaction tank, the composite salt tank transports composite salt to the salting-out reaction tank, the salting-out reaction tank performs salting-out reaction on the filtered solution, the second filter press is used to filter the solution after salting-out, the oil-water separator separates oil and water from the filtered solution and transports the separated aqueous mineral oil to an oil storage tank, the oil storage tank stores the aqueous mineral oil for standby use, so that aqueous mineral oil can be obtained from the waste emulsion to improve the recycling rate of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a waste emulsion treatment system according to an embodiment of the present invention.

[0017] Wherein, the accompanying drawings are marked as follows:

[0018] Waste emulsion tank 110, first filter press 121, evaporator 130, residue collection tank 131, temporary storage tank 140, filtration device 150, first ultrafiltration device 151, second ultrafiltration device 152, ultrafiltration collection tank 153, salting-out reaction tank 160, composite salt tank 170, second filter press 122, oil residue collection tank 181, oil-water separator 190, oil storage tank 191, wastewater collection tank 192, exhaust gas treatment system 193;

[0019] Heating device 200 , heat exchanger 210 , hot water inlet pipe 220 , cold water outlet pipe 230 , circulation pump 240 , condenser 250 , condensed water collection tank 260 . DETAILED DESCRIPTION

[0020] The following description of the present invention, with reference to the accompanying drawings, is provided to facilitate a more comprehensive understanding of the various embodiments of the present invention as defined in the claims and their equivalents. The description includes various specific details to assist understanding, but these details should be construed as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present invention.

[0021] In the description of the present invention, descriptions of directions, such as up, down, front, back, left, right, etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0022] It will be understood that when one element (e.g., a first element) is “connected” to another element (e.g., a second element), the element may be directly connected to the other element or an intervening element (e.g., a third element) may be present between the element and the other element.

[0023] The embodiment of the present invention provides a waste emulsion treatment system, such as Figure 1As shown, the system includes a waste emulsion tank 110, a first filter press 121, a heating device 200, an evaporator 130, a temporary storage tank 140, a filtration device 150, a salting-out reaction tank 160, a composite salt tank 170, a second filter press 122, an oil-water separator 190, and an oil storage tank 191, which are connected in sequence. Waste emulsion tank 110 contains waste emulsion, which is then transferred to the first filter press 121. The first filter press 121 filters the waste emulsion to remove large impurities. The filtered mother liquor is then transferred to the heating device 200, which heats the filtered mother liquor to reduce its viscosity and facilitate subsequent processing. The evaporator 130, which can be an MVR evaporator, evaporates and concentrates the heated mother liquor and transfers the concentrated liquid to the temporary storage tank 140, where it can be temporarily stored.

[0024] Temporary storage tank 140 transfers the solution to filtration device 150, which filters the concentrate again and transfers the filtered solution to salting-out reaction tank 160. Composite salt is loaded into composite salt tank 170, which is used to transfer composite salt to salting-out reaction tank 160. Salting-out reaction tank 160 is used to perform a salting-out reaction on the filtered solution. The electrolyte ions in the emulsion undergo a strong hydration reaction, i.e., a water competition, which reduces the free water molecules in the emulsion and dehydrates the oil droplets. This destroys the hydration layer of the emulsion oil droplets, neutralizes the electrical properties of the oil droplets, and destroys their double-layer structure. As a result, the oil droplets lose stability and coagulation occurs. The salted solution is then transferred to second filter press 122, which filters the salted solution. The filtered solution is then transferred to oil-water separator 190, which separates the oil and water from the filtered solution and transfers the separated aqueous mineral oil to oil storage tank 191, which stores the aqueous mineral oil for future use. This embodiment allows aqueous mineral oil to be processed from waste emulsion, thereby increasing resource reuse.

[0025] In some embodiments, the filtration device 150 includes a first ultrafiltration device 151 and a second ultrafiltration device 152, the inlet end of the first ultrafiltration device 151 is connected to the temporary storage tank 140, and the outlet end of the first ultrafiltration device 151 is connected to the salting-out reaction tank 160 to transport the solution required for use after filtration to the salting-out reaction tank 160. The first ultrafiltration device 151 is also connected to the inlet end of the second ultrafiltration device 152 to transport the filtered unwanted mother liquor to the second ultrafiltration device 152 for re-filtration, and the outlet end of the second ultrafiltration device 152 is connected to the salting-out reaction tank 160 to transport the required solution after re-filtration to the salting-out reaction tank 160 for salting-out reaction. This embodiment can improve the filtering effect of the solution, so that the purity of the substance obtained subsequently is higher.

[0026] Furthermore, the waste emulsion treatment system also includes an ultrafiltration collection tank 153, which is connected to the second ultrafiltration device 152 to collect the filtered mother liquor. The mother liquor can be subsequently discharged to the biochemical wastewater treatment area for treatment to avoid pollution to the environment.

[0027] In some embodiments, the waste emulsion treatment system also includes a wastewater collection tank 192, which is connected to the oil-water separator 190 to collect wastewater generated by the oil-water separator 190. The wastewater can then be discharged into a biochemical treatment system for treatment to avoid direct discharge and environmental pollution.

[0028] In some embodiments, the waste emulsion treatment system also includes a waste gas treatment system 193. After the oil and water are separated, there will be waste gas that cannot be condensed. The waste gas treatment system 193 is connected to the oil-water separator 190 to treat the gas in the oil-water separator 190 to prevent these waste gases from being directly discharged into the atmosphere and causing pollution.

[0029] Furthermore, the waste gas treatment system 193 includes a UV photolysis device and an activated carbon adsorption tower. The UV photolysis device irradiates the malodorous gas with ultraviolet light beams to decompose the malodorous gas, and the activated carbon adsorption tower adsorbs harmful substances in the gas, thereby greatly reducing the harmful substances in the gas.

[0030] In some embodiments, the waste emulsion treatment system also includes an oil residue collection tank 181, which is connected to the second filter press 122 for collecting the oil residue filtered out. The oil residue can be transported to a professional treatment system for subsequent treatment to avoid direct discharge and environmental pollution.

[0031] In some embodiments, the heating device 200 includes a heat exchanger 210, a hot water inlet pipe 220, a cold water outlet pipe 230, a circulation pump 240, and a condenser 250. The heat exchanger 210 includes two heat exchange channels for heat exchange, wherein the ends of one heat exchange channel are respectively connected to the first filter press 121 and the evaporator 130, and one end of the other heat exchange channel, the cold water outlet pipe 230, the condenser 250, the hot water inlet pipe 220, and the other end of the other heat exchange channel are sequentially connected. The cold water outlet pipe 230 is provided with a circulation pump 240.

[0032] When the circulation pump 240 is working, water circulates, and the cold water in the cold water outlet pipe 230 enters the condenser 250 and is heated by the condenser 250. The heated hot water enters the heat exchanger 210 through the hot water inlet pipe 220, thereby heating the solution output by the first filter press 121. The hot water itself becomes cold and then enters the condenser 250 through the cold water outlet pipe 230, thereby circulating to heat the solution.

[0033] Furthermore, the evaporator 130 is also connected to the condenser 250. The evaporator 130 can transport high-temperature steam to the condenser 250, and then exchange heat with the water in the hot water inlet pipe 220 to heat the water in the hot water inlet pipe 220. This makes rational use of the steam generated by the evaporator 130, and there is no need to configure an additional heating device for the condenser 250, thereby reducing energy consumption.

[0034] Furthermore, the condenser 250 is connected to a condensate collection tank 260. Since the steam in the evaporator 130 also contains some harmful substances, after these substances are condensed, the collection tank 260 can collect the condensate, thereby avoiding direct discharge of these harmful substances.

[0035] In some embodiments, the waste emulsion treatment system further includes a residue collection tank 131 , which is used to collect residues left after evaporation in the evaporator 130 , so as to prevent the residues from being directly discharged and causing environmental pollution.

[0036] The terms and words used in the above description and claims are not limited to their literal meanings, but are merely used by the applicant to enable a clear and consistent understanding of the present invention. Therefore, it should be clear to those skilled in the art that the above description of various embodiments of the present invention is provided for illustration only and is not intended to limit the present invention as defined in the appended claims and their equivalents.

Claims

1. A waste emulsion treatment system, characterized by: The invention comprises a waste emulsion tank, a first filter press, a heating device, an evaporator, a temporary storage tank, a filtering device, a salting-out reaction tank, a compound salt tank, a second filter press, an oil-water separator and an oil storage tank connected in sequence; the first filter press is used for filtering the waste emulsion, the heating device is used for heating the mother liquor filtered out, the evaporator is used for evaporating and concentrating the heated mother liquor and transporting the concentrated liquid to the temporary storage tank, the filtering device is used for filtering the concentrated liquid and transporting the filtered solution to the salting-out reaction tank, the compound salt tank is used for transporting compound salt to the salting-out reaction tank, the salting-out reaction tank is used for salting-out reaction on the filtered solution, the second filter press is used for filtering the salting-out solution, the oil-water separator is used for separating oil and water in the filtered solution and transporting the separated aqueous mineral oil to the oil storage tank.

2. The waste emulsion treatment system according to claim 1, characterized in that: The filtration device includes a first ultrafiltration device and a second ultrafiltration device, the inlet end of the first ultrafiltration device is connected to the temporary storage tank, the outlet end of the first ultrafiltration device is connected to the salting-out reaction tank, the first ultrafiltration device is also connected to the inlet end of the second ultrafiltration device to transport the filtered mother liquor to the second ultrafiltration device, and the outlet end of the second ultrafiltration device is connected to the salting-out reaction tank.

3. The waste emulsion treatment system according to claim 2, characterized in that: It also includes an ultrafiltration collection tank, which is connected to the second ultrafiltration device and is used to collect the filtered mother liquid.

4. The waste emulsion treatment system according to claim 1, characterized in that: It also includes a wastewater collection tank, which is connected to the oil-water separator and is used to collect wastewater generated by the oil-water separator.

5. The waste emulsion treatment system according to claim 1, characterized in that: The invention also comprises an exhaust gas treatment system, which is connected to the oil-water separator and is used for treating the gas in the oil-water separator.

6. The waste emulsion treatment system according to claim 5, characterized in that: The waste gas treatment system includes a UV photolysis device and an activated carbon adsorption tower.

7. The waste emulsion treatment system according to claim 1, characterized in that: It also includes an oil residue collection tank, which is connected to the second filter press and is used to collect the oil residue filtered out.

8. The waste emulsion treatment system according to any one of claims 1 to 7, characterized in that: The heating device includes a heat exchanger, a hot water inlet pipeline, a cold water outlet pipeline, a circulation pump and a condenser. The heat exchanger includes two heat exchange channels for heat exchange, wherein the two ends of one heat exchange channel are respectively connected to the first filter press and the evaporator, and one end of the other heat exchange channel, the cold water outlet pipeline, the condenser, the hot water inlet pipeline and the other end of the other heat exchange channel are connected in sequence, and a circulation pump is provided in the cold water outlet pipeline.

9. The waste emulsion treatment system according to claim 8, characterized in that: The evaporator is also connected to the condenser to transport the steam generated during the evaporation process to the condenser and heat the water in the hot water inlet pipe.

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