Calcium tungstate waste liquid treatment system

Abstract

The utility model provides a calcium tungstate waste liquid treatment system. The calcium tungstate waste liquid treatment system comprises a reactor (1); the liquid outlet end of the hydrochloric acid storage tank (2) is connected with the liquid inlet end of the reactor (1); the liquid outlet end of the calcium tungstate waste liquid tank (3) is connected with the liquid inlet end of the reactor (1); the liquid inlet end of the solid-liquid separator (4) is connected with the liquid outlet end of the reactor (1). Pretreatment of the calcium tungstate waste liquid before supercritical water treatment is achieved, hydrochloric acid can react with calcium tungstate to generate tungstic acid sediment, so that precious metal tungsten is recycled through a solid-liquid separation technology, the economical efficiency and efficiency of calcium tungstate waste liquid treatment work are improved, and the economic benefit of overall supercritical water treatment is improved; the treatment cost of the calcium tungstate waste liquid is reduced.

Description

Technical Field

[0001] This utility model relates to the field of waste liquid treatment technology, specifically to a calcium tungstate waste liquid treatment system. Background Technology

[0002] Supercritical water oxidation technology uses supercritical water as a medium to decompose organic matter in wastewater or sewage into non-toxic small molecule compounds such as water and carbon dioxide through an oxidation reaction with oxygen under high temperature and high pressure conditions. Because supercritical water oxidation technology has a high degradation rate of organic pollutants in wastewater or sewage and achieves complete oxidation of organic matter in a fully enclosed state without secondary pollution, this technology is receiving increasing attention.

[0003] Calcium tungstate waste liquid is a mixture containing organic waste liquid and calcium tungstate. Common disposal methods include incineration or landfill, resulting in the waste of metallic tungsten as a worthless waste. Therefore, the resource recovery and utilization of metallic tungsten is of great significance.

[0004] While supercritical water oxidation technology can efficiently convert organic matter into harmless substances for the treatment of calcium tungstate wastewater, it cannot effectively enrich the precious metal tungsten in the effluent of the system, making back-end collection difficult. Utility Model Content

[0005] The purpose of this invention is to provide a calcium tungstate waste liquid treatment system to solve the problems in related technologies, such as the waste of tungsten metal as a worthless waste, and the difficulty of tungsten recovery after supercritical water oxidation.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A calcium tungstate waste liquid treatment system, comprising:

[0008] Reactor (1);

[0009] Hydrochloric acid storage tank (2), the outlet end of the hydrochloric acid storage tank (2) is connected to the inlet end of the reactor (1);

[0010] A calcium tungstate waste liquid tank (3), the outlet end of which is connected to the inlet end of the reactor (1);

[0011] A solid-liquid separator (4) is provided, with its inlet end connected to the outlet end of the reactor (1).

[0012] Optionally, the outlet of the hydrochloric acid storage tank (2) is connected to the inlet of the reactor (1) via a hydrochloric acid feed pump (5), and the calcium tungstate waste liquid treatment system further includes:

[0013] A first pH detector (6) is connected to the reactor (1) and is used to interlock control the hydrochloric acid feeding pump (5).

[0014] Optionally, the calcium tungstate waste liquid treatment system further comprises:

[0015] A slurry preparation tank (7) is connected to the liquid outlet of the solid-liquid separator (4).

[0016] Optionally, the calcium tungstate waste liquid treatment system further comprises:

[0017] A supercritical water oxidation reactor (8) is connected to the liquid outlet of the slurry preparation tank (7) through a high-pressure pump (9).

[0018] Optionally, the calcium tungstate waste liquid treatment system further comprises:

[0019] A residue-water separation tank (10) is connected to the liquid outlet of the supercritical water oxidation reactor (8).

[0020] Optionally, the liquid outlet of the solid-liquid separator (4) is provided with a second pH detector (11), the liquid outlet of the solid-liquid separator (4) is connected to the liquid inlet of the hydrochloric acid storage tank (2) through a first valve (12), and the liquid outlet of the solid-liquid separator (4) is connected to the liquid inlet of the slurry preparation tank (7) through a second valve (13); wherein the second pH detector (11) is used to interlock control the first valve (12) and the second valve (13).

[0021] Optionally, the calcium tungstate waste liquid treatment system further comprises:

[0022] A waste lye tank (14) is connected to the liquid outlet of the second valve (13).

[0023] Optionally, the calcium tungstate waste liquid treatment system further comprises:

[0024] A clean water storage tank (15) is connected to the liquid inlet of the reactor (1) and the liquid inlet of the solid-liquid separator (4).

[0025] Optionally, the reactor (1) comprises:

[0026] An ultrasonic generator (101) is arranged at the top end of the reactor (1).

[0027] An ultrasonic vibration head (102) is arranged inside the reactor (1) and is connected with the ultrasonic generator (101);

[0028] A stirring rod (103) is arranged inside the reactor (1).

[0029] Optionally, the solid-liquid separator (4) comprises:

[0030] A solid-liquid separation device (41);

[0031] A vacuum filtration device (42) is connected with the bottom of the solid-liquid separation device (41);

[0032] A drying device (43) is connected with the solid-phase outlet end of the solid-liquid separation device (41);

[0033] A grinding device (44) is connected with the solid-phase outlet end of the drying device (43).

[0034] The beneficial effects of the present application are as follows:

[0035] The present application provides a calcium tungstate waste liquid treatment system, comprising: a reactor (1); a hydrochloric acid storage tank (2), the liquid outlet end of the hydrochloric acid storage tank (2) is connected with the liquid inlet end of the reactor (1); a calcium tungstate waste liquid tank (3), the liquid outlet end of the calcium tungstate waste liquid tank (3) is connected with the liquid inlet end of the reactor (1); a solid-liquid separator (4), the liquid inlet end of the solid-liquid separator (4) is connected with the liquid outlet end of the reactor (1). The calcium tungstate waste liquid is pretreated before supercritical water treatment, and hydrochloric acid and calcium tungstate can be used to generate tungstic acid precipitate, so that the precious metal tungsten is recovered through solid-liquid separation technology, the tungsten metal is recycled, the economy and efficiency of the calcium tungstate waste liquid treatment work are improved, the economic benefits of the supercritical water treatment are improved, and the treatment cost of the calcium tungstate waste liquid is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0037] Figure 1 It is a whole structure schematic diagram of a calcium tungstate waste liquid treatment system provided by an embodiment of the present application.

[0038] Figure 2 is a partial structure schematic view of a calcium tungstate waste liquid treatment system according to an embodiment of the present application;

[0039] Figure 3 is an internal structure schematic view of a solid-liquid separator of a calcium tungstate waste liquid treatment system according to an embodiment of the present application;

[0040] Figure 4 is a process example diagram of a calcium tungstate waste liquid treatment system according to an embodiment of the present application.

[0041] The figure mark explanation: 1-reaction vessel, 2-hydrochloric acid storage tank, 3-calcium tungstate waste liquid tank, 4-solid-liquid separator, 5-hydrochloric acid feeding pump, 6-first pH detector, 7-slurry preparation tank; 8-supercritical water oxidation reactor, 9-high pressure pump, 10-slag water separation tank; 11-second pH detector, 12-first valve, 13-second valve, 14-waste lye tank, 15-clean water storage tank, 101-ultrasonic generator, 102-ultrasonic vibration head, 103-stirring rod, 41-solid-liquid separation device, 42-vacuum filtration device, 43-drying device, 44-grinding device. DETAILED DESCRIPTION

[0042] The implementation of the present application will be described below with reference to the drawings and preferred embodiments, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure in the specification. The present application can also be implemented or applied in other different specific embodiments, and each detail in the specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, and are not intended to limit the protection scope of the present application.

[0043] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, and only show the components related to the present application in the diagrams, not the number, shape and size of the components when actually implemented. The shape, number and proportion of each component when actually implemented can be arbitrarily changed, and the component layout form can also be more complex.

[0044] Supercritical water refers to water when the gas pressure and temperature reach a certain value, the density of water expanded due to high temperature and the density of water vapor compressed due to high pressure are the same. At this time, the liquid and gas states of water have no difference, and are completely mixed together to become a new fluid in a high pressure and high temperature state. Supercritical water has strong reaction activity, and when the required treated substance is put into supercritical water, oxygen and hydrogen peroxide are filled, the substance will be oxidized and hydrolyzed. Due to the physical and chemical properties of supercritical water which are completely different from those of normal temperature and pressure water, supercritical water has wide application prospects in environmental protection, coal gasification and other aspects.

[0045] The supercritical water oxidation treatment technology is to use supercritical water as a medium to decompose organic matters contained in waste water or sewage into non-toxic small molecular compounds such as water and carbon dioxide through oxidation reaction with oxygen under high temperature and high pressure conditions. Since the supercritical water oxidation treatment technology has high degradation rate of organic pollutants in waste water or sewage, and realizes complete oxidation of organic matters in a fully closed state without secondary pollution, the technology is increasingly valued by people.

[0046] The calcium tungstate-containing waste liquid is a mixture containing organic waste liquid and calcium tungstate, and the common disposal method is incineration or landfill. Metal tungsten is disposed as worthless waste, which causes waste of metal tungsten. Therefore, the resource recycling and utilization of metal tungsten are of great significance.

[0047] Although the supercritical water oxidation technology can efficiently convert organic matters into harmless substances, the metal element tungsten contained in the waste liquid cannot be effectively enriched in the system effluent, and the collection at the rear end is difficult.

[0048] The problems solved by the utility model will be described in detail as follows:

[0049] Referring to Figure 1 , a calcium tungstate waste liquid treatment system provided by an embodiment of the utility model is shown, which comprises:

[0050] A reactor 1;

[0051] A hydrochloric acid storage tank 2, the liquid outlet end of the hydrochloric acid storage tank 2 is connected with the liquid inlet end of the reactor 1;

[0052] A calcium tungstate waste liquid tank 3, the liquid outlet end of the calcium tungstate waste liquid tank 3 is connected with the liquid inlet end of the reactor 1;

[0053] A solid-liquid separator 4, the liquid inlet end of the solid-liquid separator 4 is connected with the liquid outlet end of the reactor 1.

[0054] In a specific implementation, the calcium tungstate waste liquid treatment system can at least include: a reactor 1; a hydrochloric acid storage tank 2, and a liquid outlet end of the hydrochloric acid storage tank 2 is connected to a liquid inlet end of the reactor 1; a calcium tungstate waste liquid tank 3, and a liquid outlet end of the calcium tungstate waste liquid tank 3 is connected to a liquid inlet end of the reactor 1; a solid-liquid separator 4, and a liquid inlet end of the solid-liquid separator 4 is connected to a liquid outlet end of the reactor 1; further, the calcium tungstate waste liquid treatment can be a batch process, the calcium tungstate waste liquid can be pumped into the reactor 1 through a feeding pump, and hydrochloric acid can be added to the reactor 1 through the hydrochloric acid storage tank 2, the pH in the reactor 1 can be controlled to be less than 2, the reactor 1 can be controlled to be stirred for 1-2 hours, after calcium tungstate reacts with hydrochloric acid to generate tungstic acid precipitation and calcium chloride, solid-liquid separation can be realized through the solid-liquid separation tank 4, the solid phase is discharged after being washed with water, the tungstic acid can be recovered, and the washing water can be discharged to a subsequent supercritical section to perform slurry preparation treatment and the like subsequent processes.

[0055] In an embodiment of the present application, the liquid outlet end of the hydrochloric acid storage tank 2 is connected to the liquid inlet end of the reactor 1 through a hydrochloric acid feeding pump 5, and the calcium tungstate waste liquid treatment system further includes:

[0056] A first pH detector 6 is connected to the reactor 1, and the first pH detector 6 is used for interlocking control of the hydrochloric acid feeding pump 5.

[0057] In actual application, the liquid outlet end of the acid storage tank 2 can be connected to the liquid inlet end of the reactor 1 through the hydrochloric acid feeding pump 5, the calcium tungstate waste liquid treatment system can further include the first pH detector 6, the first pH detector 6 can be connected to the reactor 1, and the first pH detector 6 can be used for interlocking control of the hydrochloric acid feeding pump 5; specifically, the calcium tungstate waste liquid treatment is a batch process, the calcium tungstate waste liquid can be pumped into the reactor 1, and hydrochloric acid can be added to the reactor 1 through the hydrochloric acid storage tank 2, the pH detector 6 can be used for interlocking control of the hydrochloric acid feeding pump 5 according to the pH value, so as to control the pH in the reactor 1 to be less than 2; and the reactor 1 can be controlled to be stirred for 1-2 hours, after calcium tungstate reacts with hydrochloric acid to generate tungstic acid precipitation and calcium chloride, solid-liquid separation can be realized through the solid-liquid separation tank 4, the solid phase is discharged after being washed with water, the tungstic acid can be recovered, and the washing water can be discharged to a subsequent supercritical section to perform slurry preparation treatment and the like subsequent processes.

[0058] In an embodiment of the present application, the calcium tungstate waste liquid treatment system further includes:

[0059] A slurry preparation tank 7 is connected to the liquid outlet end of the solid-liquid separator 4.

[0060] In a specific implementation, the calcium tungstate waste liquid treatment system can further include a slurry preparation tank 7, and a liquid inlet of the slurry preparation tank 7 is connected to a liquid outlet of the solid-liquid separator 4; on this basis, waste acid generated by the solid-liquid separator 4 can be determined to be reused or discharged into the slurry preparation tank 7 for subsequent supercritical water treatment process according to an actual pH value after passing through the pH online detection device; and the waste acid can be sent to the subsequent supercritical water treatment process after being neutralized with organic waste alkali liquid in the slurry preparation tank 7.

[0061] In an embodiment of the present application, a second pH detector 11 is arranged at the liquid outlet of the solid-liquid separator 4, the liquid outlet of the solid-liquid separator 4 is connected to the liquid inlet of the hydrochloric acid storage tank 2 through a first valve 12, and the liquid outlet of the solid-liquid separator 4 is connected to the liquid inlet of the slurry preparation tank 7 through a second valve 13; wherein the second pH detector 11 is used to interlock control the first valve 12 and the second valve 13.

[0062] In actual application, as shown in the figure, Figure 2 the liquid outlet of the solid-liquid separator 4 can be provided with the second pH detector 11, the liquid outlet of the solid-liquid separator 4 can be connected to the liquid inlet of the hydrochloric acid storage tank 2 through the first valve 12, and the liquid outlet of the solid-liquid separator 4 can be connected to the liquid inlet of the slurry preparation tank 7 through the second valve 13; wherein the second pH detector 11 can be used to interlock control the first valve 12 and the second valve 13; waste acid generated by the solid-liquid separator 4 can be controlled to flow in a certain direction according to the pH detection result by controlling the opening and closing of the first valve 12 and / or the second valve 13 after passing through the second pH detector 11; when the pH is less than 2, the waste acid can be reused, that is, the waste acid can be returned to the hydrochloric acid storage tank 2 through the first valve 12; and when the pH is greater than 2, the waste acid can be discharged into the slurry preparation tank 7, and new hydrochloric acid can be added to the hydrochloric acid storage tank 2.

[0063] In an embodiment of the present application, the calcium tungstate waste liquid treatment system further comprises:

[0064] a waste alkali liquid tank 14, and a liquid outlet of the waste alkali liquid tank 14 is connected to a liquid outlet of the second valve 13.

[0065] In a specific implementation, the calcium tungstate waste liquid treatment system can further include a waste alkali liquid tank 14, and a liquid outlet of the waste alkali liquid tank 14 can be connected to a liquid outlet of the second valve 13, so that in the process of controlling the flow direction of the waste acid according to the pH detection result by controlling the opening and closing of the first valve 12 and / or the second valve 13, the waste acid discharged into the slurry preparation tank 7 and the waste alkali liquid discharged from the waste alkali liquid tank 14 can be neutralized when the pH is greater than 2, so as to enter the supercritical water oxidation reactor for corresponding treatment after reaching the supercritical feeding index.

[0066] In an embodiment of the present application, the calcium tungstate waste liquid treatment system further comprises:

[0067] The liquid inlet end of the supercritical water oxidation reactor 8 is connected with the liquid outlet end of the slurry preparation tank 7 through a high-pressure pump 9.

[0068] In a specific implementation, the calcium tungstate waste liquid treatment system can further comprise a supercritical water oxidation reactor 8, and the liquid inlet end of the supercritical water oxidation reactor 8 can be connected with the liquid outlet end of the slurry preparation tank 7 through a high-pressure pump 9, so that after the waste acid is treated by slurry preparation in the slurry preparation tank 7 (the waste acid is completely discharged to the waste lye tank 14 to be neutralized when the pH is greater than 2) and reaches the supercritical feed index, the waste acid can be sent to the supercritical water oxidation reactor 8 for supercritical water oxidation treatment, so that the organic pollutants can be completely decomposed, and then the intermediate product can be sent to the slag-water separation tank 10 for slag-water separation, and the tail water can be discharged after being cooled and meeting the standard.

[0069] In an embodiment of the present application, the calcium tungstate waste liquid treatment system further comprises:

[0070] The liquid inlet end of the slag-water separation tank 10 is connected with the liquid outlet end of the supercritical water oxidation reactor 8.

[0071] In actual application, the calcium tungstate waste liquid treatment system can further comprise a slag-water separation tank 10, and the liquid inlet end of the slag-water separation tank 10 can be connected with the liquid outlet end of the supercritical water oxidation reactor 8, so that after the waste acid is treated by slurry preparation in the slurry preparation tank 7 (the waste acid is completely discharged to the waste lye tank 14 to be neutralized when the pH is greater than 2) and reaches the supercritical feed index, the waste acid can be sent to the supercritical water oxidation reactor 8 for supercritical water oxidation treatment, so that the organic pollutants can be completely decomposed, and then the intermediate product can be sent to the slag-water separation tank 10 for slag-water separation, and the tail water can be discharged after being cooled and meeting the standard.

[0072] In an embodiment of the present application, the calcium tungstate waste liquid treatment system further comprises:

[0073] The liquid outlet end of the clean water storage tank 15 is connected with the liquid inlet end of the reactor 1, and the liquid outlet end of the clean water storage tank 15 is connected with the liquid inlet end of the solid-liquid separator 4.

[0074] In a specific implementation, the calcium tungstate waste liquid treatment system can further comprise a clean water storage tank 15, and the liquid outlet end of the clean water storage tank 15 can be connected with the liquid inlet end of the reactor 1, and the liquid outlet end of the clean water storage tank 15 can be connected with the liquid inlet end of the solid-liquid separator 4, so that clean water (or fresh water) can be provided for the reactor 1 and the solid-liquid separator 4, respectively.

[0075] In one embodiment of this utility model, the reactor 1 includes:

[0076] An ultrasonic generator 101 is disposed at the top of the reactor 1;

[0077] An ultrasonic vibration head 102 is disposed inside the reactor 1 and is connected to the ultrasonic generator 101.

[0078] A stirring rod 103 is disposed inside the reactor 1.

[0079] In practical applications, such as Figure 2 As shown, an ultrasonic generator 101 and an ultrasonic vibrating head 102 can be installed at the top of the calcium tungstate reactor 1. The ultrasonic vibrating head 102 can be located inside the reactor 1 and connected to the ultrasonic generator 101. A stirring rod 103 can also be installed inside the reactor 1. Thus, ultrasonic stirring can be used to stir the reaction for 1-2 hours during operation. The working principle of the ultrasonic stirrer is based on the cavitation effect of ultrasound. When ultrasound propagates in a liquid, it generates alternating high-pressure and low-pressure cycles. This pressure change causes the formation of tiny bubbles in the liquid. These bubbles violently burst during the high-pressure cycle, generating a cavitation effect that releases strong shear forces and eddies, effectively promoting the mixing and dispersion of materials.

[0080] In one embodiment of this utility model, the solid-liquid separator 4 includes:

[0081] Solid-liquid separation device 41;

[0082] Vacuum filtration device 42, which is connected to the bottom of the solid-liquid separation device 41;

[0083] Drying device 43, wherein the solid phase feed end of the drying device 43 is connected to the solid phase discharge end of the solid-liquid separation device 41;

[0084] The grinding device 44 has a solid feed end connected to the solid discharge end of the drying device 43.

[0085] In specific implementations, such as Figure 3As shown, the solid-liquid separator 4 may include a solid-liquid separation device 41; a vacuum filtration device 42 connected to the bottom of the solid-liquid separation device 41; a drying device 43, the solid feed end of the drying device 43 connected to the solid discharge end of the solid-liquid separation device 41; and a grinding device 44, the solid feed end of the grinding device 44 connected to the solid discharge end of the drying device 43.

[0086] Based on this, the solid-liquid separator 4 can employ a multiple water washing process during use. After washing, the product is determined by pH testing and then temporarily stored in a hydrochloric acid storage tank or a slurry preparation tank. Simultaneously, the solid-liquid separation device 41 can be equipped with multiple filter plates of different filtration levels, and solid-liquid separation can be achieved through a vacuum filtration device 42. Because smaller particle sizes result in poorer washing effects for solid products, three or more filter plates can be used, with lower filtration levels on the upper plates and higher filtration levels on the lower plates. During vacuum filtration, the filtrate from the upper plates can further wash the solid products on the lower plates, improving the washing effect. After washing, the solid products can enter the drying device 43 for drying, and finally enter the grinding device 44 for grinding to obtain tungstic acid-related finished products.

[0087] The following will combine Figure 4 The embodiments of this utility model are further described below:

[0088] like Figure 4 As shown, the calcium tungstate waste liquid treatment system provided in this embodiment of the present invention can be applied according to the following process:

[0089] (1) The treatment of calcium tungstate waste liquid can be a batch process. The calcium tungstate waste liquid is pumped into the reactor, hydrochloric acid is added, and the pH is controlled to be <2. A pH meter is installed on the reactor to interlock and control the hydrochloric acid feed pump. The reactor is stirred for 1-2 hours. Calcium tungstate reacts with hydrochloric acid to produce tungstic acid precipitate and calcium chloride. Solid-liquid separation is achieved through a solid-liquid separation tank. The solid phase is discharged after washing with water, and tungstic acid is recovered. The washing water is discharged to the supercritical section for slurry preparation.

[0090] Waste acid generated by the solid-liquid separator is processed by an online pH monitoring device. The opening and closing of valves 1 and 2 are controlled based on the pH readings. When the pH is less than 2, the waste acid is reused. When the pH is greater than 2, all waste acid is discharged to the mixing tank, neutralized with organic waste alkaline solution, and then sent to supercritical treatment. Fresh hydrochloric acid is added to the hydrochloric acid storage tank.

[0091] The waste acid generated from solid-liquid separation is mixed into a slurry to meet the supercritical feed index and then enters the supercritical reactor for treatment. The organic pollutants are completely decomposed, the slag and water are separated, and the tailwater is cooled and discharged in compliance with standards.

[0092] (2) The ultrasonic generator can be arranged in the calcium tungstate reactor, and the reaction is stirred by ultrasonic for 1-2 hours. The working principle of the ultrasonic stirrer is based on the cavitation effect of ultrasonic. When the ultrasonic propagates in the liquid, the alternating high pressure and low pressure cycle is generated, and the pressure change causes the formation of micro bubbles in the liquid. The bubbles will break violently in the high pressure cycle, and the cavitation effect is generated to release strong shear force and vortex, which effectively promotes the mixing and dispersion between materials.

[0093] (3) The solid-liquid separator adopts multiple water washing, and the product after water washing is determined to flow to the hydrochloric acid storage tank or the slurry preparation tank for temporary storage after pH detection. Meanwhile, multiple filter layers are arranged in the solid-liquid separation device, and the filter levels are different, so that the solid-liquid separation can be realized by the vacuum filtration device (vacuum equipment). Because the smaller the particle size is, the worse the water washing effect is in the water washing process, three or more filter layers are arranged, the upper layer has a low filter level, and the lower layer has a high filter level. The filtered liquid of the upper layer can wash the solid product of the lower layer again in the filtration process, so that the washing effect is improved. The solid product is dried in the drying device after water washing, and finally ground in the grinder to obtain the tungstic acid related finished product.

[0094] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other.

[0095] Finally, it should be noted that, in this document, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, product or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, product or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, product or equipment including the element.

[0096] The above describes in detail the tungsten acid calcium waste liquid treatment system provided by the utility model, the principle and implementation mode of the utility model are described by applying specific examples in this document, and the above embodiment is only used to help understand the method and core idea of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range will be changed according to the idea of the utility model, and the above is not understood as the limitation of the utility model.

Claims

1. A calcium tungstate waste liquor treatment system, characterized by, The application relates to a calcium tungstate waste liquid treatment system. The calcium tungstate waste liquid treatment system comprises the following components: a reactor (1); a hydrochloric acid storage tank (2), the outlet end of the hydrochloric acid storage tank (2) being connected with the inlet end of the reactor (1); a calcium tungstate waste liquid tank (3), the outlet end of the calcium tungstate waste liquid tank (3) being connected with the inlet end of the reactor (1); 2. The calcium tungstate spent liquor treatment system of claim 1, wherein, a solid-liquid separator (4), the inlet end of the solid-liquid separator (4) being connected with the outlet end of the reactor (1). The outlet end of the hydrochloric acid storage tank (2) is connected with the inlet end of the reactor (1) through a hydrochloric acid feeding pump (5), and the calcium tungstate waste liquid treatment system further comprises:

3. The calcium tungstate spent liquor treatment system of claim 1, wherein, a first pH detector (6), which is connected with the reactor (1) and is used for interlocking control of the hydrochloric acid feeding pump (5). The calcium tungstate waste liquid treatment system further comprises:

4. The calcium tungstate spent liquor treatment system of claim 3, wherein, a slurry preparation tank (7), the inlet end of the slurry preparation tank (7) being connected with the outlet end of the solid-liquid separator (4). The calcium tungstate waste liquid treatment system further comprises:

5. The calcium tungstate spent liquor treatment system of claim 4, wherein, a supercritical water oxidation reactor (8), the inlet end of the supercritical water oxidation reactor (8) being connected with the outlet end of the slurry preparation tank (7) through a high-pressure pump (9). The calcium tungstate waste liquid treatment system further comprises:

6. The calcium tungstate spent liquor treatment system of claim 3, wherein, a residue water separation tank (10), the inlet end of the residue water separation tank (10) being connected with the outlet end of the supercritical water oxidation reactor (8).

7. The calcium tungstate spent liquor treatment system of claim 6, wherein, The outlet end of the solid-liquid separator (4) is provided with a second pH detector (11), the outlet end of the solid-liquid separator (4) being connected with the inlet end of the hydrochloric acid storage tank (2) through a first valve (12) and being connected with the inlet end of the slurry preparation tank (7) through a second valve (13); wherein the second pH detector (11) is used for interlocking control of the first valve (12) and the second valve (13). The calcium tungstate waste liquid treatment system further comprises:

8. The calcium tungstate spent liquor treatment system of claim 1, wherein, a waste lye tank (14), the outlet end of the waste lye tank (14) being connected with the outlet end of the second valve (13). The calcium tungstate waste liquid treatment system further comprises:

9. The calcium tungstate spent liquor treatment system of claim 1, wherein, a clean water storage tank (15), the outlet end of the clean water storage tank (15) being connected with the inlet end of the reactor (1) and being connected with the inlet end of the solid-liquid separator (4). The reactor (1) comprises: an ultrasonic generator (101), which is arranged at the top end of the reactor (1); an ultrasonic vibration head (102), which is arranged in the interior of the reactor (1) and is connected with the ultrasonic generator (101); 10. The calcium tungstate spent liquor treatment system of claim 1, wherein, a stirring rod (103), which is arranged in the interior of the reactor (1). The solid-liquid separator (4) comprises: a solid-liquid separation device (41); a vacuum filtration device (42), which is connected with the bottom of the solid-liquid separation device (41). a drying device (43), a solid phase feeding end of which is connected with a solid phase discharging end of the solid-liquid separation device (41); a grinding device (44), a solid phase feeding end of which is connected with a solid phase discharging end of the drying device (43).

Images