Waste acid liquid recovery device with impurity filtering function

Abstract

The invention relates to the field of industrial sewage treatment, in particular to a waste acid solution recovery device with an impurity filtering function, which comprises a primary filtering assembly, the whole device is vertically arranged, a waste acid solution is conveyed into the primary filtering assembly, the waste acid solution falls under the action of gravity, and the filtering effect is realized through the primary filtering assembly; the filtered waste acid liquid enters the heating chamber assembly under the action of gravity to be heated, crystals are separated out in the heating process of the waste acid liquid, the waste acid liquid spirally flows in the heating chamber assembly, and after heating is completed, the crystals fall into the centrifugal separation assembly along with the liquid, so that the centrifugal separation assembly rotates, and the crystals are separated out; the separated crystals are thrown out under the action of centrifugal force, the acid liquor falls off from the center, the thrown crystals are pushed out through the centrifugal throwing-out assembly, and the acid liquor continues to fall off and is conveyed out through the acid liquor conveying pump and the conveying pipe, so that the follow-up waste acid liquor treatment load is reduced, and the waste acid liquor treatment and recovery efficiency is higher.

Description

Technical Field

[0001] The invention relates to the field of industrial sewage treatment, and in particular to a waste acid liquid recovery device with an impurity filtering function. Background Art

[0002] A large amount of waste acid liquid is often generated during the production process of electroplating, PCB, and metal processing industries. Its main pollutants are heavy metals, nitrogen, COD, and phosphorus. If the waste acid is discharged directly, it will seriously pollute the water body, endanger the human living environment, and have a significant impact on human health. The impurities contained in the waste acid liquid are divided into insoluble impurities and soluble impurities. For insoluble impurities, filtration and other methods are generally used to remove them; for soluble impurities, adsorption by adsorbents and other methods are mostly used to remove them. The adsorbent needs to be replaced after reaching adsorption saturation; The existing publication number is CN111170320B, which is a device and method for recycling waste acid liquid in polysilicon texturing. In the secondary chemical reaction precipitation section, hydrofluoric acid is neutralized by a primary reaction, and a secondary reaction generates a fluorosilicate precipitate, which can be sold; the dilute nitric acid can be distilled and purified to generate concentrated nitric acid in the dilute nitric acid section, and the method uses a dehydrating agent vacuum distillation process to evaporate and concentrate the nitric acid to obtain about 65% of dilute nitric acid, which can be directly reused in the texturing liquid system, so as to achieve the recycling of nitric acid and reduce the cost of reagents; the dehydrating agent regeneration section is to add a certain amount of magnesium oxide to a small amount of dilute magnesium nitrate solution to neutralize it, and then evaporate it to obtain a high-concentration concentrated magnesium nitrate, which can be directly used as a dehydrating agent in the distillation purification section. The present invention achieves the resource utilization and recycling of wastewater and solid waste, further reduces the operating expenses and production costs of enterprises, and meets the requirements of energy saving, high efficiency and environmental protection; The existing waste acid recovery device mainly has the following disadvantages: 1. Most existing technologies are single-stage filtration, which is easily blocked by impurities in the waste acid solution, increasing the load of subsequent treatment and affecting the efficiency of waste acid solution treatment and recovery; 2. The prior art usually directly uses steam heating to recover and heat the waste acid solution, which results in low heat exchange efficiency and creates the risk of the acid solution being diluted by steam. Summary of the invention

[0003] The object of the present invention is to provide a waste acid liquid recovery device with impurity filtering function to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A waste acid liquid recovery device with impurity filtering function is provided, comprising a primary filtering assembly, the lower end of the primary filtering assembly is fixedly connected to the upper end of a heating chamber assembly, the lower end of the heating chamber assembly is fixedly connected to the upper end of a secondary filtering mechanism, the lower end of the secondary filtering mechanism is fixedly connected to the liquid inlet of an acid liquid delivery pump, and the liquid outlet of the acid liquid delivery pump is fixedly connected to a delivery pipe; wherein The secondary filtering mechanism comprises: A centrifugal separation component, the upper end of which is fixedly connected to the lower end of the heating chamber component, and a centrifugal throwing-out component is rotatably connected inside the centrifugal separation component.

[0005] Furthermore, the primary filter assembly includes: A primary filter chamber, wherein a protective cover is fixedly connected to the upper end of the primary filter chamber, a waste acid liquid inlet is fixedly connected to the protective cover, the cross-section of the primary filter chamber is a right-angled trapezoid, a waste acid liquid outlet is opened at the lower end of the primary filter chamber, a primary filter screen is fixedly connected in the primary filter chamber, the primary filter screen is inclined, a sedimentation tank is fixedly connected to one side of the primary filter chamber, a rotating shaft 1 is rotatably connected at the waste acid liquid outlet, a conical guide groove is fixedly connected to the lower end of the waste acid liquid outlet, an impeller 1 is fixedly connected to the rotating shaft 1, a cam is fixedly connected to the upper end of the rotating shaft 1, the cam is located below the primary filter screen, a guide rod is fixedly connected to the primary filter chamber, a spring 1 is sleeved on the guide rod, one end of the spring 1 is fixedly connected to the sliding rod, and the cam abuts against the sliding rod.

[0006] Furthermore, the heating chamber assembly includes: A heating chamber body, wherein a protective cover is fixedly connected to the upper end of the heating chamber body, a secondary inlet is opened at the upper end of the protective cover, and the secondary inlet is fixedly connected to the lower end of the conical guide groove; a spiral drainage channel is fixedly connected to the heating chamber body, and a plurality of heat conducting plates are fixedly connected to the spiral drainage channel; a spiral heating tube is fixedly connected to the outside of the heating chamber body, and a protective shell is fixedly connected to the outside of the spiral heating tube.

[0007] Furthermore, the centrifugal separation component comprises: A conical drainage shell, in which an impeller 2 is fixedly connected, the upper end of the conical drainage shell is rotatably connected to the lower end of the heating chamber body, the lower end of the conical drainage shell is fixedly connected to a bearing, the bearing is fixedly connected to the upper end of a cover, the cover is fixedly connected to the upper end of a collecting trough, and the lower end of the collecting trough is conical.

[0008] Furthermore, the centrifugal ejection assembly includes: A second rotating shaft is rotatably connected in the collecting tank, an impeller three is fixedly connected to the second rotating shaft, a driven wheel is also fixedly connected to the second rotating shaft, a plurality of guide shafts are fixedly connected to the outer side of the driven wheel, a spring two is sleeved on the guide shaft, an arc-shaped push plate is slidably connected to the guide shaft, a limiting tooth is fixedly connected to the arc-shaped push plate, an extrusion rod is fixedly connected to the other end of the arc-shaped push plate, a fixed shaft is fixedly connected in the collecting tank, a roller is rotatably connected to the upper end of the fixed shaft, and a spiral protrusion is provided on the inner wall of the conveying pipe.

[0009] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: 1. The primary filter assembly is fixed, and the entire device is arranged vertically. The waste acid liquid is transported to the primary filter assembly. Under the action of gravity, the waste acid liquid falls, and the filtering effect is achieved through the primary filter assembly. After the filtration is completed, the waste acid liquid enters the heating chamber assembly under the action of gravity for heating treatment. Crystals will precipitate during the heating of the waste acid liquid. The waste acid liquid spirally flows in the heating chamber assembly. After the heating is completed, the crystals fall into the centrifugal separation assembly together with the liquid, so that the centrifugal separation assembly rotates, and the precipitated crystals are thrown out by centrifugal force. The acid liquid falls from the center, and the thrown-out crystals are pushed out by the centrifugal throwing assembly. The acid liquid continues to fall and is transported out through the acid liquid delivery pump and the delivery pipe, thereby reducing the subsequent load on the waste acid liquid treatment, and making the waste acid liquid treatment and recovery more efficient.

[0010] 2. After the waste acid liquid passes through the waste acid liquid outlet, it enters the heating chamber assembly, and the waste acid liquid falls on the spiral drainage channel, and flows along the spiral drainage channel to the lower end of the heating chamber body. The spiral heating tube generates heat in the heating chamber body. At the same time, the spiral drainage channel and the heat conductive sheet generate heat to heat the waste acid liquid and precipitate crystals. The waste acid liquid is heated while flowing downward along the spiral drainage channel, which prolongs the time the waste acid liquid stays in the heating chamber body. While improving the heat exchange efficiency, the heating chamber body is heated by the spiral heating tube. The waste acid liquid is heated by heat conduction, which avoids the risk of the acid liquid being diluted by steam.

[0011] 3. The acid pushes the blade three to rotate during the falling process, thereby driving the rotating shaft two and the driven wheel to rotate. The driven wheel rotates to drive the guide shaft, the arc push plate and the spring two to rotate, thereby pushing the crystal in the collection tank to move. When the arc push plate rotates to the position of the roller, the extrusion shaft drives the arc push plate to deviate, so that the spring two is compressed. When the extrusion shaft leaves the roller, the spring two quickly resets, thereby resetting the arc push plate and the limit tooth, thereby pushing the crystal to move outward. The kinetic energy of the falling acid is used to drive the mechanical system, which reduces the dependence on external energy. The whole process has a high degree of automation, which reduces the need for manual operation. At the same time, through the mechanical transmission system, the energy transfer efficiency is high, which can effectively push the crystal to move for the collection of the incoming crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0013] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the primary filter assembly of the present invention; Figure 3 It is a schematic diagram of the overall three-dimensional structure of the primary filter assembly of the present invention; Figure 4 It is a schematic diagram of the overall three-dimensional structure of the tapered guide groove of the present invention; Figure 5 It is a schematic diagram of the overall three-dimensional structure of the heating chamber assembly of the present invention; Figure 6 It is a schematic diagram of the overall three-dimensional structure of the centrifugal separation assembly of the present invention; Figure 7 It is a schematic diagram of the overall three-dimensional structure of the centrifugal throwing assembly of the present invention; Figure 8 It is a schematic diagram of the overall three-dimensional structure of the centrifugal ejection assembly of the present invention; Fig. 9 It is a schematic diagram of the overall three-dimensional structure of the arc push plate of the present invention; Fig.10It is a cross-sectional view of the overall three-dimensional structure of the delivery pipe of the present invention; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Primary filter assembly; 11. Primary filter chamber; 111. Guide rod; 112. Spring 1; 113. Sliding rod; 12. Protective cover; 13. Waste acid liquid inlet; 14. Primary filter screen; 15. Sedimentation tank; 16. Rotating shaft 1; 161. Cam; 17. Conical guide groove; 18. Impeller 1; 2. Heating chamber assembly; 21. Heating chamber body; 211. Spiral drainage channel; 212. Heat conducting sheet; 22. Protective cover; 23. Spiral heating tube; 24. Protective shell; 3. Secondary filtering mechanism; 31. Centrifugal separation assembly; 311. Conical drainage shell; 312. Impeller 2; 313. Cover; 314. Collecting tank; 3141. Fixed shaft; 32. Centrifugal throwing assembly; 321. Rotating shaft 2; 322. Impeller 3; 323. Driven wheel; 324. Guide shaft; 325. Spring 2; 326. Arc push plate; 3261. Extrusion rod; 327. Limiting tooth; 328. Roller; 4. Acid delivery pump; 5. Delivery pipe; 51. Spiral bump. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the solution of the present application, the following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0016] Reference Figure 1 As shown, a waste acid liquid recovery device with impurity filtering function includes a primary filtering component 1, the lower end of the primary filtering component 1 is fixedly connected to the upper end of the heating chamber component 2, the lower end of the heating chamber component 2 is fixedly connected to the upper end of the secondary filtering mechanism 3, the lower end of the secondary filtering mechanism 3 is fixedly connected to the liquid inlet of the acid liquid delivery pump 4, and the liquid outlet of the acid liquid delivery pump 4 is fixedly connected with a delivery pipe 5; wherein The secondary filtering mechanism 3 includes: The centrifugal separation component 31 has its upper end fixedly connected to the lower end of the heating chamber component 2 , and a centrifugal throwing-out component 32 is rotatably connected inside the centrifugal separation component 31 .

[0017] The primary filter component 1 is fixed, and the entire device is arranged vertically. The waste acid liquid is transported to the primary filter component 1. Under the action of gravity, the waste acid liquid falls and the filtering effect is achieved through the primary filter component 1. After the filtration is completed, the waste acid liquid enters the heating chamber component 2 for heating treatment under the action of gravity. In the process of heating the waste acid liquid, crystals will precipitate. The waste acid liquid spirally flows in the heating chamber component 2. After the heating is completed, the crystals fall into the centrifugal separation component 31 together with the liquid, so that the centrifugal separation component 31 rotates, and the precipitated crystals are thrown out by centrifugal force. The acid liquid falls from the center, and the thrown out crystals are pushed out by the centrifugal throwing component 32. The acid liquid continues to fall and is transported out through the acid liquid delivery pump 4 and the delivery pipe 5.

[0018] Reference Figure 2-4 As shown, the primary filter assembly 1 includes: A primary filter chamber 11, a protective cover 12 is fixedly connected to the upper end of the primary filter chamber 11, a waste acid liquid inlet 13 is fixedly connected to the protective cover 12, the cross section of the primary filter chamber 11 is a right-angled trapezoid, a waste acid liquid outlet is opened at the lower end of the primary filter chamber 11, a primary filter screen 14 is fixedly connected in the primary filter chamber 11, the primary filter screen 14 is tilted, a sedimentation tank 15 is fixedly connected to one side of the primary filter chamber 11, and a rotating shaft is rotatably connected to the waste acid liquid outlet. 16, a conical guide groove 17 is fixedly connected to the lower end of the waste acid liquid outlet, an impeller 18 is fixedly connected to the rotating shaft 16, a cam 161 is fixedly connected to the upper end of the rotating shaft 16, the cam 161 is located below the primary filter screen 14, a guide rod 111 is fixedly connected in the primary filter chamber 11, a spring 112 is sleeved on the guide rod 111, one end of the spring 112 is fixedly connected to the sliding rod 113, and the cam 161 abuts against the sliding rod 113.

[0019] The waste acid liquid falls into the primary filter chamber 11 through the waste acid liquid inlet 13 on the protective cover 12. During the falling process, the waste acid liquid passes through the filter screen to filter out the solid impurities in the waste acid liquid. Then the waste acid liquid flows out from the waste acid liquid outlet at the lower end of the primary filter chamber 11. When the waste acid liquid passes through the waste acid liquid outlet, it drives the impeller 18 to rotate, thereby driving the cam 161 fixedly connected thereto to rotate. The rotation of the cam 161 drives the slide rod 113 to slide back and forth on the guide rod 111, and at the same time, the spring expands and contracts, causing the primary filter chamber 11 and the primary filter screen 14 to vibrate.

[0020] Reference Figure 5 As shown, the heating chamber assembly 2 includes: A heating chamber body 21, the upper end of which is fixedly connected with a protective cover 22, the upper end of which is provided with a secondary inlet, which is fixedly connected to the lower end of the conical guide groove 17, a spiral drainage channel 211 is fixedly connected inside the heating chamber body 21, a plurality of heat conducting plates 212 are fixedly connected to the spiral drainage channel 211, a spiral heating tube 23 is fixedly connected to the outer side of the heating chamber body 21, and a protective shell 24 is fixedly connected to the outer side of the spiral heating tube 23.

[0021] After passing through the waste acid liquid outlet, the waste acid liquid enters the heating chamber assembly 2, and falls onto the spiral drainage channel 211, and flows along the spiral drainage channel 211 to the lower end of the heating chamber body 21, and generates heat in the heating chamber body 21 through the spiral heating tube 23. At the same time, the spiral drainage channel 211 and the heat conductive plate 212 generate heat to heat the waste acid liquid and precipitate crystals.

[0022] Reference Figure 6 As shown, the centrifugal separation component 31 includes: A conical drainage shell 311, in which an impeller 2 312 is fixedly connected, the upper end of the conical drainage shell 311 is rotatably connected to the lower end of the heating chamber body 21, the lower end of the conical drainage shell 311 is fixedly connected to a bearing, the bearing is fixedly connected to the upper end of a cover 313, the cover 313 is fixedly connected to the upper end of a collecting tank 314, and the lower end of the collecting tank 314 is conical.

[0023] The waste acid liquid drives the crystals to flow downward along the spiral drainage channel 211, causing the waste acid liquid to generate a vortex. After falling into the conical drainage shell 311, it drives the impeller 2 312 to rotate, thereby driving the conical drainage shell 311 to rotate. After the waste acid liquid that generates the vortex enters the collection tank 314, the crystals are thrown out under the action of centrifugal force and remain in the collection tank 314, and the acid liquid falls from the middle.

[0024] Reference Figure 7-10 As shown, the centrifugal ejection assembly 32 includes: The second rotating shaft 321 is rotatably connected in the collecting groove 314, the second rotating shaft 321 is fixedly connected with the third impeller 322, the second rotating shaft 321 is also fixedly connected with the driven wheel 323, the outer side of the driven wheel 323 is fixedly connected with a plurality of guide shafts 324, the guide shaft 324 is sleeved with a second spring 325, the guide shaft 324 is slidably connected with an arc-shaped push plate 326, the arc-shaped push plate 326 is fixedly connected with a limiting tooth 327, the other end of the arc-shaped push plate 326 is fixedly connected with an extrusion rod 3261, the collecting groove 314 is fixedly connected with a fixed shaft 3141, the upper end of the fixed shaft 3141 is rotatably connected with a roller 328, and a spiral protrusion 51 is provided on the inner wall of the conveying pipe 5.

[0025] During the falling process, the acid liquid pushes the blade three to rotate, thereby driving the rotating shaft 2 321 and the driven wheel 323 to rotate. The rotation of the driven wheel 323 drives the guide shaft 324, the arc-shaped push plate 326 and the spring 2 325 to rotate, thereby pushing the crystal in the collecting tank 314 to move. When the arc-shaped push plate 326 rotates to the position of the roller 328, the extrusion shaft drives the arc-shaped push plate 326 to deviate, causing the spring 2 325 to be compressed. When the extrusion shaft leaves the roller 328, the spring 2 325 quickly resets, thereby resetting the arc-shaped push plate 326 and the limit tooth 327, thereby pushing the crystal to move outward.

Claims

1. A waste acid liquid recovery device with impurity filtering function, characterized in that: The invention comprises a primary filter assembly (1), the lower end of the primary filter assembly (1) being fixedly connected to the upper end of a heating chamber assembly (2), the lower end of the heating chamber assembly (2) being fixedly connected to the upper end of a secondary filter mechanism (3), the lower end of the secondary filter mechanism (3) being fixedly connected to the liquid inlet of an acid liquid delivery pump (4), and the liquid outlet of the acid liquid delivery pump (4) being fixedly connected to a delivery pipe (5); wherein The secondary filtering mechanism (3) comprises: A centrifugal separation component (31), wherein the upper end of the centrifugal separation component (31) is fixedly connected to the lower end of the heating chamber component (2), and a centrifugal throw-out component (32) is rotatably connected inside the centrifugal separation component (31).

2. The waste acid liquid recovery device with impurity filtering function according to claim 1, characterized in that: The primary filter assembly (1) comprises: A primary filter chamber (11), wherein a protective cover (12) is fixedly connected to the upper end of the primary filter chamber (11), a waste acid liquid inlet (13) is fixedly connected to the protective cover (12), the primary filter chamber (11) has a right-angled trapezoidal cross section, a waste acid liquid outlet is provided at the lower end of the primary filter chamber (11), a primary filter screen (14) is fixedly connected inside the primary filter chamber (11), the primary filter screen (14) is arranged in an inclined manner, a sedimentation tank (15) is fixedly connected to one side of the primary filter chamber (11), and a rotating shaft (16) is rotatably connected to the waste acid liquid outlet. The lower end of the waste acid liquid outlet is fixedly connected to a conical guide groove (17), the rotating shaft (16) is fixedly connected to an impeller (18), the upper end of the rotating shaft (16) is fixedly connected to a cam (161), the cam (161) is located below the primary filter screen (14), the primary filter chamber (11) is fixedly connected to a guide rod (111), the guide rod (111) is sleeved with a spring (112), one end of the spring (112) is fixedly connected to a slide rod (113), and the cam (161) abuts against the slide rod (113).

3. The waste acid liquid recovery device with impurity filtering function according to claim 2, characterized in that: The heating chamber assembly (2) comprises: A heating chamber body (21), wherein the upper end of the heating chamber body (21) is fixedly connected to a protective cover (22), the upper end of the protective cover (22) is provided with a secondary inlet, the secondary inlet is fixedly connected to the lower end of the conical guide groove (17), a spiral drainage channel (211) is fixedly connected inside the heating chamber body (21), a plurality of heat conducting plates (212) are fixedly connected to the spiral drainage channel (211), a spiral heating tube (23) is fixedly connected to the outside of the heating chamber body (21), and a protective shell (24) is fixedly connected to the outside of the spiral heating tube (23).

4. The waste acid liquid recovery device with impurity filtering function according to claim 3 is characterized in that: The centrifugal separation component (31) comprises: A conical drainage shell (311), wherein an impeller 2 (312) is fixedly connected inside the conical drainage shell (311), the upper end of the conical drainage shell (311) is rotatably connected to the lower end of the heating chamber body (21), the lower end of the conical drainage shell (311) is fixedly connected to a bearing, the bearing is fixedly connected to the upper end of a sealing cover (313), the sealing cover (313) is fixedly connected to the upper end of a collecting trough (314), and the lower end of the collecting trough (314) is conical.

5. The waste acid liquid recovery device with impurity filtering function according to claim 4, characterized in that: The centrifugal ejection assembly (32) comprises: A second rotating shaft (321), the second rotating shaft (321) is rotatably connected in the collecting tank (314), the second rotating shaft (321) is fixedly connected to an impeller (322), the second rotating shaft (321) is also fixedly connected to a driven wheel (323), the outer side of the driven wheel (323) is fixedly connected to a plurality of guide shafts (324), the guide shaft (324) is sleeved with a second spring (325), the guide shaft (324) is slidably connected to an arc-shaped push plate (326), the arc-shaped push plate (326) is fixedly connected to a limiting tooth (327), the other end of the arc-shaped push plate (326) is fixedly connected to an extrusion rod (3261), a fixed shaft (3141) is fixedly connected in the collecting tank (314), the upper end of the fixed shaft (3141) is rotatably connected to a roller (328), and a spiral protrusion (51) is provided on the inner wall of the conveying pipe (5).

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