CN112442727A

CN112442727A - Electroplating solution treatment device and treatment method

Info

Publication number: CN112442727A
Application number: CN202011061833.0A
Authority: CN
Inventors: 陈斌
Original assignee: Zhejiang Hongyu Environmental Protection Technology Co ltd
Current assignee: Zhejiang Hongyu Environmental Protection Technology Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-03-05
Anticipated expiration: 2040-09-30
Also published as: CN112442727B

Abstract

The invention discloses a plating solution treatment device and a treatment method, which comprises a recovery tank, an evaporator and an evaporation tank, cooling element, vacuum tank and concentrate hold up tank, evaporating pot inside is fixed with the evaporating pipe, the bottom of evaporating pot is equipped with the pan feeding mouth that is linked together with the one end of evaporating pipe and is connected through pan feeding mouth and accumulator, the vapour-liquid separator who is linked together with the other end of evaporating pipe is installed at the top of evaporating pot, the bottom of vapour-liquid separator is equipped with the liquid outlet and connects through liquid outlet and concentrate hold up tank, the top of vapour-liquid separator is equipped with out the vapour mouth and connects through play vapour mouth and cooling element, cooling element and vacuum tank are connected, be equipped with the air inlet on the side at evaporating pot top and connect through air inlet and evaporimeter, be equipped with the gas outlet on the side of evaporating pot bottom and be connected with steam condensate tank on it, steam condensate tank and cooling element connect. The invention has the beneficial effects that: can fully recover chromic acid in the chromium plating and roughening rinsing water.

Description

Electroplating solution treatment device and treatment method

Technical Field

The invention relates to the technical field related to chromic acid recovery of an electroplating line, in particular to a plating solution treatment device and a plating solution treatment method.

Background

Electroplating production is considered to be a source of environmental pollution. This is true as well: many electroplating plants continuously discharge harmful chemicals into the earth, rivers and the atmosphere, and if the harmful chemicals are not controlled, the environment is seriously polluted. In fact, this situation also limits the survival and development of the electroplating industry itself. The general trend in treating electroplating contamination is to control the electroplating production, particularly the emissions. These emissions often contain precious metals, and wasting precious metals is wasteful of money. But in addition to economic factors, the driving force for really promoting environmental protection is the attention of the government. Most countries around the world now have legislation that defines the concentration and total amount of harmful substances in electroplating effluent.

At present, the strictest new environmental protection method is implemented in all aspects in China, and more severe examination is provided for the majority of electroplating enterprises. Because the electroplating work piece brings out a large amount of plating solution, not only cause the waste of electroplating raw and other materials, brought huge economy and environmental protection pressure for later stage waste water discharge up to standard moreover.

At present, clean production is advocated in various industries, pollution sources are controlled from the source, the resource utilization rate is improved, pollutants are reduced or avoided in the production process, and lost resources in the production process are recycled as far as possible.

Disclosure of Invention

The invention provides a plating solution treatment device and a treatment method which can fully recover chromic acid in chromium plating and rough rinsing water in the plating solution, aiming at overcoming the defects of huge economic loss and environmental pollution caused by direct discharge of the plating solution in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a plating solution treatment method comprising the steps of:

before use, an evaporator is started, hot gas is introduced into an evaporation tank, an evaporation pipe inside the evaporation tank is heated to 100-200 ℃, a water cooling system is started simultaneously, cooling water is introduced into a water washing tank, and a cooling pipe inside the water washing tank is cooled to 20-30 ℃;

pumping the electroplating solution in the recovery tank into a preheating tank for preheating, pumping into an evaporation tube for water evaporation after preheating is finished, and performing vapor-liquid separation in a separation tank;

step three, the separated vapor is sucked into a washing tank for washing and cooling, the vapor enters a vacuum tank for vacuum cooling after the washing and cooling are finished, and the coarsened recovery liquid after the vacuum cooling is pumped into a recovery tank for secondary treatment;

step four, the separated concentrated solution flows into the concentrated solution storage tank from a feed inlet of the concentrated solution storage tank through a cooling pipeline, a vacuumizing port of the concentrated solution storage tank is opened when the concentrated solution enters the concentrated solution storage tank, on one hand, the concentrated solution flowing through the cooling pipeline is subjected to primary air cooling, and on the other hand, the interior of the concentrated solution storage tank is subjected to vacuumizing cooling;

step five, standing the concentrated solution after vacuum cooling for a period of time to precipitate impurities, starting a water pump to extract the recycled concentrated solution when a turbidity sensor detects that the turbidity of the concentrated solution in a concentrated solution storage tank reaches a certain degree, and simultaneously enabling a liquid suction head of a liquid suction pipeline in the concentrated solution storage tank to change according to the change of the liquid level of the recycled concentrated solution so as to enable the liquid suction head to always extract the solution from the liquid level end of the recycled concentrated solution, filtering the precipitated recycled concentrated solution through a filter screen at the liquid suction head, and pumping the filtered recycled concentrated solution into a roughening tank for recycling;

and step six, opening the vacuum-pumping port of the concentrated solution storage tank again after the liquid pumping is finished, drying the impurities in the concentrated solution storage tank, opening the slag discharging port at the bottom of the concentrated solution storage tank after the drying, and sweeping the impurities at the bottom of the concentrated solution storage tank out of the concentrated solution storage tank through the slag discharging port by using a cleaning push plate and a cleaning rolling brush in the concentrated solution storage tank.

The chromic acid recycling and reusing system designed by the invention is a reduced pressure evaporation concentration system, and has high evaporation efficiency and small energy loss; chromic acid in the chromium plating and roughening rinsing water can be fully recovered, and loop-back use is realized, so that quasi-zero emission of the chromium plating and roughening rinsing water is finally realized; the temperature of the electroplating solution preheated by the preheating box in the evaporation tube is increased more quickly, the evaporation efficiency is higher, and the vapor-liquid separation is more sufficient; the cooling, the precipitation and the impurity removal of the concentrated solution are all integrated into a concentrated solution storage tank, so that the manufacturing cost of the equipment is reduced, and the occupied area of the equipment is reduced.

Preferably, in the first step, the heated hot gas of the evaporation tube is partially liquefied, the liquefied water flows into the steam condensate water tank for cooling, and the cooled water provides cooling water for the water cooling system, so that the water can be reused, the fresh water consumption is reduced, and the water utilization rate is improved.

The invention also provides an electroplating solution treatment device, which comprises a recovery tank, an evaporator, an evaporation tank, a cooling assembly, a vacuum tank and a concentrated solution storage tank, wherein an evaporation pipe is fixed inside the evaporation tank, the bottom of the evaporation tank is provided with a feed inlet communicated with one end of the evaporation pipe and is connected with the recovery tank through the feed inlet, the top of the evaporation tank is provided with a vapor-liquid separation tank communicated with the other end of the evaporation pipe, the bottom of the vapor-liquid separation tank is provided with a liquid outlet and is connected with the concentrated solution storage tank through the liquid outlet, the top of the vapor-liquid separation tank is provided with a vapor outlet and is connected with the cooling assembly through the vapor outlet, the cooling assembly is connected with the vacuum tank, the side surface of the top of the evaporation tank is provided with an air inlet and is connected with the evaporator through the air inlet, the side surface of the bottom of the evaporation tank is provided with an air, the steam condensate tank is connected with the cooling assembly.

An evaporation tube is fixed in the evaporation tank, a feed inlet communicated with one end of the evaporation tube is arranged at the bottom of the evaporation tank and is connected with a recovery tank through the feed inlet, a vapor-liquid separation box communicated with the other end of the evaporation tube is arranged at the top of the evaporation tank, a liquid outlet is arranged at the bottom of the vapor-liquid separation box and is connected with a concentrated solution storage tank through the liquid outlet, a vapor outlet is arranged at the top of the vapor-liquid separation box and is connected with a cooling assembly through the vapor outlet, the cooling assembly is connected with a vacuum tank, an air inlet is arranged on the side surface of the top of the evaporation tank and is connected with an evaporator through the air inlet, an air outlet is arranged on the side surface of the bottom of the evaporation tank and is connected with a, wherein the evaporating pots can be arranged in a plurality of series modes, and the evaporating tubes can be arranged in a spiral shape to improve the vapor-liquid separation efficiency of the electroplating solution; the vapor-liquid separation box is used for separating evaporated concentrated liquid and water vapor, the separated concentrated liquid enters a concentrated liquid storage tank for cooling, precipitation and impurity removal, then enters a plating bath and is conveyed back to a production line for reuse, the separated water vapor flows into a vacuum tank after being cooled and liquefied by a cooling assembly, and then is cooled for the second time by the vacuum tank to become coarsened recovered liquid which enters a recovery tank for the second treatment.

Preferably, the cooling assembly comprises a cooling water tank and a water washing tank, the steam cooling water tank is connected with the cooling water tank, a cooling pipe is fixed inside the water washing tank, the top of the water washing tank is provided with a steam inlet communicated with one end of the cooling pipe and connected with a steam outlet of the steam-liquid separation tank through the steam inlet, the bottom of the water washing tank is provided with a water outlet communicated with the other end of the cooling pipe and connected with the vacuum tank through the water outlet, the side surface of the bottom of the water washing tank is provided with a first cooling water inlet and connected with the cooling water tank through a first cooling water inlet, the side surface of the top of the water washing tank is provided with a first cooling water outlet and connected with the cooling tower through the first cooling water outlet, the cooling tower is connected with the cooling water tank, and water cooled in the steam cooling water tank can be pumped into the cooling water tank to serve as a cooling water source to supply cooling water to the water washing tank, so that the fresh water; the washing tanks may be provided in a plurality of serial patterns, and the cooling pipes may be shaped in a spiral shape to improve the cooling efficiency of the water vapor; the cooling tower is used for continuously cooling the used cooling water and enabling the cooling water to flow back to the cooling water tank for reuse, and the utilization rate of the cooling water is improved.

Preferably, the top of the vacuum tank is provided with a first vacuumizing port and a water inlet of the vacuum tank, the vacuum tank is connected with the water outlet of the washing tank through the water inlet of the vacuum tank, the bottom of the vacuum buffer tank is provided with a vacuum air inlet and is connected with the first vacuumizing port of the vacuum tank through the vacuum air inlet, the top of the vacuum buffer tank is provided with a vacuum air outlet and is connected with an air pump, the bottom of the vacuum buffer tank is provided with a second cooling water inlet and is connected with a cooling water tank through a second cooling water inlet, the top of the vacuum buffer tank is provided with a second cooling water outlet and is connected with a cooling tower pipeline through the second cooling water outlet, a cooling coil is fixed inside the vacuum buffer tank, the second cooling water inlet and the second cooling water outlet are connected through the cooling coil, the air pump vacuumizes the vacuum tank through the vacuumizing port, and performs secondary cooling concentration on condensate water; the gas pumped out from the vacuum tank by the air pump also contains partial chromic acid, so that a vacuum buffer tank is additionally arranged between the air pump and the vacuum tank and is used for cooling the gas pumped out from the vacuum tank by the air pump so as to liquefy residual chromic acid coolant in the gas, fully recover and reuse chromic acid liquid on one hand, and enable the gas pumped out from the air pump to be pure gas on the other hand, thereby avoiding environmental pollution.

Preferably, a cooling tower water inlet pipe is installed at the top of the cooling tower, a cooling tower cavity is arranged in the cooling tower, a rotary power head is fixed on the top surface of the cooling tower cavity, a water outlet pipeline communicated with the cooling tower water inlet pipe is connected to the rotary power head in a rotating mode, the water outlet pipeline is in a curve shape, a plurality of water outlet holes are formed in the outer surface of the water outlet pipeline, an air inlet net communicated with the cooling tower cavity is installed on the side surface of the cooling tower and is arranged on the side surface of the water inlet pipe, a plurality of air outlet pipelines are fixed on the upper end surface of the cooling tower, a fan and a plurality of baffle groups are fixed in the air outlet pipelines, the baffle groups are arranged below the fan, and cooling water used by the cooling tank and the vacuum buffer tank enters the cooling tower cavity through; the rotary power head is used for driving the curved water outlet pipeline to rotate, so that cooling water is sprayed into the cooling tower through the water outlet hole in a rotating mode, the cooling water entering the cooling tower is more dispersed, the contact area between the cooling water and air is greatly increased, the cooling time of the cooling water is faster, and the efficiency is higher; the fan sucks air into the cooling tower from the air inlet net to cool sprayed cooling water, and water vapor taken away by the air is condensed into water drops to be remained in the cooling tower when meeting the baffle group of the air outlet pipeline, so that the loss of the cooling water is reduced.

Preferably, a water turning assembly is installed in the cavity of the cooling tower and is located at the bottom of the cavity of the cooling tower, the water turning assembly comprises a rotating frame, rotating shafts are fixed on two stand columns of the rotating frame, the rotating frame is installed in the cavity of the cooling tower through the two rotating shafts and is in rotating connection with the cavity of the cooling tower, the rotating shafts and the bottoms of air inlet nets are arranged on the same horizontal plane, water turning spoons are fixed on two transverse shafts of the rotating frame, a temperature sensor and a cooling tower water outlet pipe are installed at the bottom of the cooling tower, the temperature sensor is electrically connected with a fan, the cooling tower is connected with a cooling water tank through the cooling tower water outlet pipe, air sucked into the cooling tower by the air inlet nets can blow the rotating frame to rotate, and ceaselessly stir cooling water falling to the bottom of the cooling tower through the water turning spoons; the temperature sensor is used for detecting the temperature of cooling water at the bottom of the cooling tower in real time, and when the temperature of the cooling water does not fall to a preset value, the temperature sensor can send a signal to the fan, so that the rotating speed of the fan is increased, the air suction is increased, and the cooling power of the cooling tower is improved.

Preferably, a storage tank liquid inlet pipe is installed at the top of the concentrated liquid storage tank, a storage tank cavity is arranged inside the concentrated liquid storage tank, a liquid outlet pipeline communicated with the storage tank liquid inlet pipe is installed on the top surface of the storage tank cavity, the liquid outlet pipeline is U-shaped, fan heat fins are sleeved on two side edges of the liquid outlet pipeline and are rotatably connected with the liquid outlet pipeline, tooth blocks meshed with each other are arranged on the surfaces of the two fan heat fins, a vacuumizing opening II is arranged at the top of the concentrated liquid storage tank and is arranged right above the liquid outlet pipeline, and concentrated liquid flowing out of the vapor-liquid separation box sequentially flows into the concentrated liquid cavity through the storage tank liquid inlet pipe and the liquid outlet pipeline; the additional heat radiating fins can absorb heat of concentrated liquid flowing through the liquid outlet pipeline, the second vacuumizing port is arranged right above the liquid outlet pipeline, and the two heat radiating fins on the liquid outlet pipeline can be driven to rotate while vacuumizing and air suction are carried out, so that the heat radiating efficiency of the heat radiating fins is improved.

Preferably, a liquid outlet head and a rotating seat are mounted on the side wall of the cavity of the storage tank, one end of the liquid outlet head is arranged in the cavity of the storage tank and is connected with a liquid outlet hose, the other end of the liquid outlet head is arranged outside the cavity of the storage tank and is connected with a liquid outlet pipe of the storage tank, an electroplating tank is connected with the liquid outlet pipe of the storage tank, the rotating seat is arranged on the side surface of the liquid outlet head and is rotatably connected with a rotating rod, one end of the liquid outlet hose is mounted on the liquid outlet head, the other end of the liquid outlet hose is fixed on the rotating rod, a filter screen and a liquid level sensor are fixed at the liquid inlet of the liquid outlet hose, the liquid level sensor is electrically connected with the rotating seat, and concentrated; the liquid level sensor who adds is used for responding to the liquid level change of concentrate to transmit the liquid level signal for rotating the seat, rotate the height that the seat passes through the last liquid inlet of dwang control play liquid hose, make play liquid hose carry out the imbibition from the liquid level end of concentrate all the time, prevent to inhale the impurity that deposits in the bottom, the cooperation of rethread filter screen, the suction of impurity that has significantly reduced has guaranteed the quality of retrieval and utilization concentrate.

As preferred, the bottom of concentrate hold up tank lateral surface is fixed with the side cavity, it is connected with the baffle to rotate between hold up tank cavity and the side cavity, be equipped with sharp unit head and clean push pedal in the hold up tank side cavity, clean push pedal is fixed on sharp unit head and is arranged in between sharp unit head and the baffle, clean round brush is installed to the bottom of clean push pedal, the bottom of hold up tank cavity is equipped with the row's cinder notch corresponding with clean push pedal, can dismantle on the cinder notch and be connected with the cock body, sharp unit head is used for providing power for clean push pedal, clean the impurity of remaining in the concentrate hold up tank bottom through clean push pedal and clean round brush, sweep out the concentrate hold up tank through row's cinder notch.

The invention has the beneficial effects that: chromic acid in the chromium plating and roughening rinsing water can be fully recovered, and loop-back use is realized, so that quasi-zero emission of the chromium plating and roughening rinsing water is finally realized; the temperature of the electroplating solution preheated by the preheating box in the evaporation tube is increased more quickly, the evaporation efficiency is higher, and the vapor-liquid separation is more sufficient; the fresh water consumption is reduced, and the water utilization rate is improved; the cooling, the precipitation and the impurity removal of the concentrated solution are all integrated into a concentrated solution storage tank for carrying out, so that the manufacturing cost of equipment is reduced, and the occupied area of the equipment is reduced; the cooling water is sprayed to the cooling tower through the rotary power head and continuously stirred with the water turning spoon, so that the cooling time of the cooling water is faster, and the efficiency is higher.

Drawings

FIG. 1 is a piping connection diagram of the invention;

FIG. 2 is a schematic view of the construction of the vaporization tank of FIG. 1;

FIG. 3 is a schematic diagram of the structure of the wash tank of FIG. 1;

FIG. 4 is a schematic view of the structure of the vacuum tank of FIG. 1;

FIG. 5 is a schematic view of the vacuum buffer tank of FIG. 1;

FIG. 6 is a schematic diagram of the cooling tower of FIG. 1;

FIG. 7 is an internal structural view of FIG. 6;

FIG. 8 is a schematic view of the structure of the concentrate storage tank of FIG. 1;

FIG. 9 is an internal structural view of FIG. 8;

fig. 10 is a schematic view of the structure of the liquid outlet head in fig. 9.

In the figure: 1. a cooling tower, 2, a water washing tank, 3, a vapor-liquid separation tank, 4, an evaporation tank, 5, an evaporator, 6, a recovery tank, 7, a vapor condensate tank, 8, a concentrated solution storage tank, 9, an electroplating tank, 10, a vacuum tank, 11, a vacuum buffer tank, 12, an air pump, 13, a cooling water tank, 14, a vapor outlet, 15, a liquid outlet, 16, an air inlet, 17, an evaporation pipe, 18, an air outlet, 19, an air inlet, 20, an air inlet, 21, a first cooling water outlet, 22, a cooling pipe, 23, a first cooling water inlet, 24, a water outlet, 25, a first vacuum pumping port, 26, a water inlet of the vacuum tank, 27, a vacuum air outlet, 28, a second cooling water outlet, 29, a vacuum air inlet, 30, a cooling coil, 31, a second cooling water inlet, 32, a water inlet of the cooling tower, 33. the cooling tower comprises an air inlet net, 34, a cooling tower water outlet pipe, 35, a cooling tower cavity, 36, a rotary power head, 37, a fan, 38, an air outlet pipeline, 39, a baffle group, 40, an water outlet pipeline, 41, a water outlet hole, 42, a temperature sensor, 43, a rotating shaft, 44, a rotating frame, 45, a water turning spoon, 46, a storage tank liquid outlet pipe, 47, a vacuumizing port II, 48, a storage tank liquid inlet pipe, 49, a liquid outlet pipeline, 50, a storage tank cavity, 51, a cleaning push plate, 52, a side cavity, 53, a linear power head, 54, a cleaning rolling brush, 55, a baffle, 56, a plug body, 57, a slag discharge port, 58, a liquid outlet head, 59, a rotating seat, 60, a rotating rod, 61, a liquid outlet hose, 62, a fan heat fin, 63, a tooth block, 64, a filter screen and 65 a liquid level.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

In one embodiment, as illustrated in FIG. 1, a plating solution treatment method includes the steps of:

In the first step, the hot gas after the evaporation tube is heated can be partially liquefied, the liquefied water flows into a steam condensate water tank for cooling, and the cooled water provides cooling water for a water cooling system.

As shown in fig. 1, the present invention further provides an electroplating solution treatment apparatus, which comprises a recycling tank 6, an evaporator 5, an evaporation tank 4, a cooling assembly, a vacuum tank 10 and a concentrated solution storage tank 8, as shown in fig. 1 and 2, an evaporation tube 17 is fixed inside the evaporation tank 4, a material inlet 19 communicated with one end of the evaporation tube 17 is arranged at the bottom of the evaporation tank 4 and is connected with the recycling tank 6 through the material inlet 19, a vapor-liquid separation tank 3 communicated with the other end of the evaporation tube 17 is arranged at the top of the evaporation tank 4, and a liquid outlet 15 is arranged at the bottom of the vapor-liquid separation tank 3 and is connected with the concentrated solution storage tank 8 through the liquid outlet 15.

As shown in fig. 1 and 2, the top of the vapor-liquid separation tank 3 is provided with a vapor outlet 14 and is connected with a cooling assembly through the vapor outlet 14, the cooling assembly is connected with the vacuum tank 10, the side surface of the top of the evaporation tank 4 is provided with a gas inlet 16 and is connected with the evaporator 5 through the gas inlet 16, the side surface of the bottom of the evaporation tank 4 is provided with a gas outlet 18 and is connected with a vapor condensate tank 7, and the vapor condensate tank 7 is connected with the cooling assembly.

As shown in fig. 1, the cooling assembly comprises a cooling water tank 13, a washing tank 2, a cooling tower 1 and a vacuum buffer tank 11, a steam condensate tank 7 is connected with the cooling water tank 13, as shown in fig. 1 and 3, a cooling pipe 22 is fixed inside the washing tank 2, a steam inlet 20 communicated with one end of the cooling pipe 22 is arranged at the top of the washing tank 2 and is connected with a steam outlet 14 of the steam-liquid separation tank 3 through the steam inlet 20, and a water outlet 24 communicated with the other end of the cooling pipe 22 is arranged at the bottom of the washing tank 2 and is connected with the vacuum tank 10 through the water outlet 24.

As shown in fig. 1 and 3, a cooling water inlet first 23 is provided on a side surface of the bottom of the water washing tank 2 and connected to the cooling water tank 13 through the cooling water inlet first 23, a cooling water outlet first 21 is provided on a side surface of the top of the water washing tank 2 and connected to the cooling tower 1 through the cooling water outlet first 21, and the cooling tower 1 is connected to the cooling water tank 13.

As shown in fig. 1 and 4, a first vacuum pumping port 25 and a vacuum tank water inlet 26 are provided at the top of the vacuum tank 10, and the vacuum tank 10 is connected to the water outlet 24 of the rinsing tank 2 through the vacuum tank water inlet 26.

As shown in fig. 1 and 5, the bottom of the vacuum buffer tank 11 is provided with a vacuum inlet 29 and is connected with a first vacuum pumping port 25 of the vacuum tank 10 through the vacuum inlet 29, the top of the vacuum buffer tank 11 is provided with a vacuum outlet 27 and is connected with the air pump 12, and the bottom of the vacuum buffer tank 11 is provided with a second cooling water inlet 31 and is connected with the cooling water tank 13 through the second cooling water inlet 31.

As shown in fig. 1 and 5, a second cooling water outlet 28 is arranged at the top of the vacuum buffer tank 11 and is connected with the cooling tower 1 through a second cooling water outlet 28 by a pipeline, a cooling coil 30 is fixed inside the vacuum buffer tank 11, and a second cooling water inlet 31 and the second cooling water outlet 28 are connected through the cooling coil 30.

As shown in fig. 1 and 6, a cooling tower water inlet pipe 32 is installed at the top of the cooling tower 1, as shown in fig. 7, a cooling tower cavity 35 is arranged inside the cooling tower 1, a rotary power head 36 is fixed on the top surface of the cooling tower cavity 35, a water outlet pipe 40 communicated with the cooling tower water inlet pipe 32 is rotatably connected to the rotary power head 36, the water outlet pipe 40 is shaped like a curve, a plurality of water outlet holes 41 are formed in the outer surface of the water outlet pipe 40, an air inlet net 33 communicated with the cooling tower cavity 35 is installed on the side surface of the cooling tower 1, and the air inlet net 33 is arranged on the side surface of the water inlet pipe.

As shown in fig. 7, a plurality of air outlet pipes 38 are fixed on the upper end surface of the cooling tower 1, a fan 37 and a plurality of baffle groups 39 are fixed in the air outlet pipes 38, and the baffle groups 39 are disposed below the fan 37.

As shown in fig. 7, a water turning assembly is installed in the cooling tower cavity 35, the water turning assembly is located at the bottom of the cooling tower cavity 35, the water turning assembly includes a rotating frame 44, rotating shafts 43 are fixed on two vertical columns of the rotating frame 44, the rotating frame 44 is installed in the cooling tower cavity 35 through the two rotating shafts 43 and is rotatably connected with the cooling tower cavity 35, the rotating shafts 43 and the bottom of the air inlet net 33 are placed on the same horizontal plane, water turning scoops 45 are fixed on two horizontal shafts of the rotating frame 44, a temperature sensor 42 and a cooling tower water outlet pipe 34 are installed at the bottom of the cooling tower 1, the temperature sensor 42 is electrically connected with the fan 37, and the cooling tower 1 is connected with the cooling water tank 13 through the cooling tower water outlet pipe 34.

As shown in fig. 1 and 8, a storage tank liquid inlet pipe 48 is installed at the top of the concentrated solution storage tank 8, as shown in fig. 8 and 9, a storage tank cavity 50 is arranged inside the concentrated solution storage tank 8, a liquid outlet pipe 49 communicated with the storage tank liquid inlet pipe 48 is installed on the top surface of the storage tank cavity 50, the liquid outlet pipe 49 is U-shaped, two side edges of the liquid outlet pipe 49 are respectively sleeved with a heat dissipation fin 62, the heat dissipation fins 62 are rotatably connected with the liquid outlet pipe 49, the surfaces of the two heat dissipation fins 62 are provided with mutually meshed toothed blocks 63, a second vacuum pumping port 47 is arranged at the top of the concentrated solution storage tank 8, and the second vacuum pumping port 47 is arranged right above the liquid outlet pipe 49.

As shown in fig. 9, a liquid outlet 58 and a rotating base 59 are mounted on a side wall of the storage tank cavity 50, one end of the liquid outlet 58 is disposed in the storage tank cavity 50 and connected with a liquid outlet hose 61 thereon, the other end of the liquid outlet 58 is disposed outside the storage tank cavity 50 and connected with a storage tank liquid outlet pipe 46 thereon, the storage tank liquid outlet pipe 46 is connected with the electroplating tank 9, the rotating base 59 is disposed on a side surface of the liquid outlet 58 and rotatably connected with a rotating rod 60 thereon, one end of the liquid outlet hose 61 is mounted on the liquid outlet 58, the other end of the liquid outlet hose 61 is fixed on the rotating rod 60, a filter screen 64 and a liquid level sensor 65 are fixed at a liquid inlet of the liquid outlet hose 61, and the liquid.

As shown in fig. 9, a side cavity 52 is fixed at the bottom of the outer side surface of the concentrated solution storage tank 8, a partition plate 55 is rotatably connected between the storage tank cavity 50 and the side cavity 52, a linear power head 53 and a cleaning push plate 51 are arranged in the side cavity 52, the cleaning push plate 51 is fixed on the linear power head 53 and is arranged between the linear power head 53 and the partition plate 55, a cleaning rolling brush 54 is installed at the bottom of the cleaning push plate 51, a slag discharge port 57 corresponding to the cleaning push plate 51 is arranged at the bottom of the storage tank cavity 50, and a plug 56 is detachably connected to the slag discharge port 57.

Before use, the evaporator 5 is started, hot air is introduced into the evaporation tank 4 to heat the evaporation pipe 17 in the evaporation tank, and meanwhile, the cooling water tank 13 is started to introduce cooling water into the water washing tank 2 to cool the cooling pipe 22 in the water washing tank.

The recovery process comprises the following steps:

firstly, pumping the electroplating solution in the recovery tank 6 into a preheating tank for preheating, and pumping the electroplating solution into a heated evaporation tank 4 for evaporation after preheating is finished;

secondly, introducing the water vapor from the evaporation tank 4 into the washing tank 2 through a vapor outlet 14 of the vapor-liquid separation tank 3 for cooling and liquefaction, and allowing the liquefied condensate water to flow into the vacuum tank 10 through a water outlet 24 of the washing tank 2 for vacuum cooling (an air pump 12 vacuumizes the vacuum tank 10 through a first vacuumizing port 25 and secondarily cools and concentrates the condensate water in the vacuum tank 10), wherein the gas extracted from the vacuum tank 10 by the air pump 12 can liquefy and recycle the residual chromic acid liquid in the gas through cooling of a vacuum buffer tank 11, and the coarsely recovered liquid after vacuum cooling is pumped into a recovery tank 6 for secondary treatment;

and thirdly, pumping the concentrated solution from the evaporation tank into a concentrated solution storage tank 8 through a liquid outlet 15 of the vapor-liquid separation box 3 for cooling, precipitation and impurity removal, and then feeding the concentrated solution into an electroplating bath 9 and conveying the concentrated solution back to the production line for reuse.

The working principle of the cooling tower 1 is as follows: when cooling water flows through the water outlet pipeline 40, the rotary power head 36 works to drive the water outlet pipeline 40 to rotate, so that the cooling water is rotationally sprayed into the cooling tower 1 through the water outlet hole 41; simultaneously, the fan 37 works to suck air into the cooling tower 1 from the air inlet net 33 and perform air cooling on the sprayed cooling water; meanwhile, air is sucked into the cooling tower 1 to blow the rotating frame 44 to rotate, so that the water turning spoon 45 on the rotating frame continuously turns over and stirs cooling water falling into the bottom of the cooling tower 1, and cooling of the cooling water is accelerated.

The working principle of the concentrated solution storage tank 8 is as follows:

when the concentrated solution flows through the liquid outlet pipeline 49, the second vacuumizing port 47 is opened to vacuumize the interior of the concentrated solution storage tank 8; the concentrated solution storage tank 8 is vacuumized and induced draft, and simultaneously blows two heat fins 62 on the liquid outlet pipeline 49 to rotate, so that the concentrated solution in the liquid outlet pipeline 49 is accelerated to dissipate heat;

when the precipitated concentrated solution is pumped back, the liquid level sensor 65 senses the liquid level change of the concentrated solution and transmits a liquid level signal to the rotating seat 59, the rotating seat 59 controls the height of a liquid inlet on the liquid outlet hose 61 through the rotating rod 60, so that the liquid outlet hose 61 always absorbs liquid from the liquid level end of the concentrated solution to prevent impurities precipitated at the bottom from being sucked, and the concentrated solution in the storage tank cavity 50 is pumped into the electroplating tank 9 through the liquid outlet hose 61, the liquid outlet head 58 and the storage tank liquid outlet pipe 46 in sequence for recycling.

The evacuation mouth of concentrate hold up tank 8 is opened again after the drawing liquid finishes, carries out drying process to the impurity in the concentrate hold up tank 8, opens the row cinder notch 57 of concentrate hold up tank 8 bottom after the drying, and the work of sharp unit head 53 promotes clean push pedal 51 and clean round brush 54 and cleans the impurity that remains in the concentrate hold up tank 8 bottom simultaneously, and it can to cover cock body 56 after finishing cleaning.

Claims

1. A plating solution treatment method comprising the steps of:

2. The method for treating an electroplating solution according to claim 1, wherein the hot gas heated in the evaporation tube in the first step is partially liquefied, the liquefied water is cooled by flowing into a vapor condensate tank, and the cooled water supplies cooling water to a water cooling system.

3. An electroplating solution treatment device is characterized by comprising a recovery tank (6), an evaporator (5), an evaporation tank (4), a cooling assembly, a vacuum tank (10) and a concentrated solution storage tank (8), wherein an evaporation pipe (17) is fixed in the evaporation tank (4), a feeding port (19) communicated with one end of the evaporation pipe (17) is arranged at the bottom of the evaporation tank (4) and is connected with the recovery tank (6) through the feeding port (19), a vapor-liquid separation box (3) communicated with the other end of the evaporation pipe (17) is arranged at the top of the evaporation tank (4), a liquid outlet (15) is arranged at the bottom of the vapor-liquid separation box (3) and is connected with the concentrated solution storage tank (8) through the liquid outlet (15), a vapor outlet (14) is arranged at the top of the vapor-liquid separation box (3) and is connected with the cooling assembly through the vapor outlet (14), and the cooling assembly is connected with the vacuum tank (10), the side face of the top of the evaporating pot (4) is provided with an air inlet (16) and is connected with the evaporator (5) through the air inlet (16), the side face of the bottom of the evaporating pot (4) is provided with an air outlet (18) and is connected with a steam condensate water tank (7), and the steam condensate water tank (7) is connected with the cooling assembly.

4. The electroplating solution treatment device as claimed in claim 3, wherein the cooling assembly comprises a cooling water tank (13), a washing tank (2), a cooling tower (1) and a vacuum buffer tank (11), the steam condensate tank (7) is connected with the cooling water tank (13), a cooling pipe (22) is fixed inside the washing tank (2), a steam inlet (20) communicated with one end of the cooling pipe (22) is formed in the top of the washing tank (2) and is connected with a steam outlet (14) of the steam-liquid separation tank (3) through the steam inlet (20), a water outlet (24) communicated with the other end of the cooling pipe (22) is formed in the bottom of the washing tank (2) and is connected with the vacuum tank (10) through the water outlet (24), a first cooling water inlet (23) is formed in the side surface of the bottom of the washing tank (2) and is connected with the cooling water tank (13) through the first cooling water inlet (23), the side at the top of the water washing tank (2) is provided with a first cooling water outlet (21) and is connected with the cooling tower (1) through the first cooling water outlet (21), and the cooling tower (1) is connected with the cooling water tank (13).

5. The electroplating solution treatment device as claimed in claim 4, wherein a first vacuum pumping port (25) and a first vacuum tank water inlet (26) are arranged at the top of the vacuum tank (10), the vacuum tank (10) is connected with a water outlet (24) of the water washing tank (2) through the first vacuum tank water inlet (26), a vacuum air inlet (29) is arranged at the bottom of the vacuum buffer tank (11) and is connected with the first vacuum pumping port (25) of the vacuum tank (10) through the vacuum air inlet (29), a vacuum air outlet (27) is arranged at the top of the vacuum buffer tank (11) and is connected with the air pump (12), a second cooling water inlet (31) is arranged at the bottom of the vacuum buffer tank (11) and is connected with the cooling water tank (13) through the second cooling water inlet (31), a second cooling water outlet (28) is arranged at the top of the vacuum buffer tank (11) and is connected with the cooling tower (1) through the second cooling water outlet (28), and a cooling coil (30) is fixed in the vacuum buffer tank (11), and the second cooling water inlet (31) and the second cooling water outlet (28) are connected through the cooling coil (30).

6. The electroplating solution treatment device according to claim 4, wherein a cooling tower water inlet pipe (32) is installed at the top of the cooling tower (1), a cooling tower cavity (35) is arranged inside the cooling tower (1), a rotary power head (36) is fixed on the top surface of the cooling tower cavity (35), a water outlet pipeline (40) communicated with the cooling tower water inlet pipe (32) is rotatably connected onto the rotary power head (36), the water outlet pipeline (40) is in a curve shape, a plurality of water outlet holes (41) are formed in the outer surface of the water outlet pipeline (40), an air inlet net (33) communicated with the cooling tower cavity (35) is installed on the side surface of the cooling tower (1), the air inlet net (33) is arranged on the side surface of the water inlet pipe, and a plurality of air outlet pipelines (38) are fixed on the upper end surface of the cooling tower (1), a fan (37) and a plurality of baffle groups (39) are fixed in the air outlet pipeline (38), and the baffle groups (39) are arranged below the fan (37).

7. The electroplating solution treatment device according to claim 6, wherein a water turning assembly is installed in the cooling tower cavity (35), the water turning assembly is located at the bottom of the cooling tower cavity (35), the water turning assembly comprises a rotating frame (44), rotating shafts (43) are fixed on two vertical columns of the rotating frame (44), the rotating frame (44) is installed in the cooling tower cavity (35) through the two rotating shafts (43) and is rotatably connected with the cooling tower cavity (35), the rotating shafts (43) and the bottoms of the air inlet nets (33) are arranged on the same horizontal plane, water turning scoops (45) are fixed on two transverse shafts of the rotating frame (44), a temperature sensor (42) and a cooling tower water outlet pipe (34) are installed at the bottom of the cooling tower (1), and the temperature sensor (42) is electrically connected with a fan (37), the cooling tower (1) is connected with the cooling water tank (13) through a cooling tower water outlet pipe (34).

8. The plating liquid processing apparatus as recited in claim 3, wherein said concentrated solution storage tank (8) is provided at the top thereof with a storage tank inlet pipe (48), a storage tank cavity (50) is arranged in the concentrated solution storage tank (8), a liquid outlet pipeline (49) communicated with a storage tank liquid inlet pipe (48) is arranged on the top surface of the storage tank cavity (50), the liquid outlet pipeline (49) is U-shaped, the two side edges of the liquid outlet pipeline (49) are sleeved with heat radiating fins (62), the heat radiating fins (62) are rotationally connected with the liquid outlet pipeline (49), the surfaces of the two heat radiating fins (62) are provided with mutually meshed gear blocks (63), a second vacuum-pumping port (47) is arranged at the top of the concentrated solution storage tank (8), the second vacuumizing port (47) is arranged right above the liquid outlet pipeline (49).

9. The electroplating solution treatment device according to claim 8, wherein a liquid outlet head (58) and a rotating seat (59) are installed on the side wall of the storage tank cavity (50), one end of the liquid outlet head (58) is arranged in the storage tank cavity (50) and is connected with a liquid outlet hose (61), the other end of the liquid outlet head (58) is arranged outside the storage tank cavity (50) and is connected with a storage tank liquid outlet pipe (46), the storage tank liquid outlet pipe (46) is connected with an electroplating bath (9), the rotating seat (59) is arranged on the side surface of the liquid outlet head (58) and is rotatably connected with a rotating rod (60), one end of the liquid outlet hose (61) is installed on the liquid outlet head (58), the other end of the liquid outlet hose (61) is fixed on the rotating rod (60), a filter screen (64) and a liquid level sensor (65) are fixed at the liquid inlet of the liquid outlet hose (61), the liquid level sensor (65) is electrically connected with the rotating seat (59).

10. The electroplating solution processing apparatus according to claim 8, wherein a side cavity (52) is fixed at the bottom of the outer side surface of the concentrated solution storage tank (8), a partition plate (55) is rotatably connected between the storage tank cavity (50) and the side cavity (52), a linear power head (53) and a cleaning push plate (51) are arranged in the side cavity (52), the cleaning push plate (51) is fixed on the linear power head (53) and is arranged between the linear power head (53) and the partition plate (55), a cleaning roller brush (54) is installed at the bottom of the cleaning push plate (51), a slag discharge port (57) corresponding to the cleaning push plate (51) is arranged at the bottom of the storage tank cavity (50), and a plug body (56) is detachably connected to the slag discharge port (57).