CN211998899U

CN211998899U - High-salt organic electroplating wastewater evaporative crystallization device

Info

Publication number: CN211998899U
Application number: CN202020018206.8U
Authority: CN
Inventors: 李中豫; 李彩琴; 逯明星; 乔豪; 田承庆; 邓明博; 王文兴
Original assignee: Xi'an Jiuhuan Technology Co ltd
Current assignee: Xi'an Jiuhuan Technology Co ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-11-24
Anticipated expiration: 2030-01-06

Abstract

The embodiment of the utility model discloses organic electroplating effluent evaporative crystallization device of high salt, including the triple effect evaporimeter, one-effect evaporator and the two-effect evaporative crystallizer that connect gradually, be connected with two-effect hydrocyclone and thickening evaporative crystallizer on the two-effect evaporative crystallizer respectively, it is provided with thickening effect hydrocyclone and organic matter jar still to connect on the thickening evaporative crystallizer, thickening ware and filter have set gradually under two-effect hydrocyclone and the thickening effect hydrocyclone, still include the condenser, the condenser is connected with triple effect evaporimeter, the utility model provides an organic electroplating effluent evaporative crystallization device of high salt, this device mainly is handled this organic electroplating effluent of high salt by the principle of evaporative crystallization. Heavy metal wastewater is concentrated and recycled through evaporation and crystallization, and evaporated condensate water can be reused as electroplating process water.

Description

High-salt organic electroplating wastewater evaporative crystallization device

Technical Field

The utility model relates to an evaporative crystallization field especially relates to a high salt organic electroplating effluent evaporative crystallization device.

Background

Electroplating is a type of industry with a wide application range in the existing production, and the electroplating industry has serious pollution to the environment, in particular to high-salt organic electroplating wastewater. Because the electroplating process is various and complex, the quality of electroplating wastewater of different enterprises is greatly different, but the common characteristic is that the components of the wastewater are very complex, and the wastewater contains a large amount of metal ions such as: chromium, nickel, cyanogen, acid, alkali and organic additive. High-salt organic electroplating wastewater is a highly harmful sewage category, and if not properly treated, seriously harms the environment and human health.

The treatment of high-salt organic electroplating wastewater is generally regarded as important at home and abroad, and various treatment technologies are developed to eliminate and reduce the discharge amount of pollutants by taking measures of converting toxic treatment into non-toxic and harmful treatment into harmless treatment, recovering precious metals, recycling water and the like. With the rapid development of the electroplating industry and the increasing of the environmental protection requirement, the current electroplating sewage treatment begins to enter the integration stage of clean production process, total amount control and circular economy, and the resource recycling and closed cycle are the main development directions.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a technical problem that will solve provides a more efficient high salt organic electroplating effluent evaporative crystallization device.

High salt organic electroplating effluent evaporation crystallization device, including the triple effect evaporimeter, one-effect evaporimeter and the two-effect evaporation crystallizer that connect gradually, be connected with two-effect hydrocyclone and thickening evaporation crystallizer on the two-effect evaporation crystallizer respectively, it is provided with thickening effect hydrocyclone and organic matter jar still to connect on the thickening evaporation crystallizer, set gradually thickener and filter under two-effect hydrocyclone and the thickening effect hydrocyclone, still include the condenser, the condenser is connected with the triple effect evaporimeter.

The condensation system is also included, the steam condensate of the shell pass of the first-effect evaporator and the thickening evaporation crystallizer flows out for recycling by virtue of pressure difference, the evaporation condensate of the shell pass of the second-effect evaporation crystallizer flows into the shell pass flash evaporation heat of the third-effect evaporator by virtue of pressure difference and then flows into the evaporation condensate storage tank at the bottom of the condenser by virtue of pressure difference together with the condensate of the shell pass of the third-effect evaporator, a heat source is provided for preheating of feeding of the system by virtue of the preheater on the way, the evaporation condensate of the shell pass of the condenser also flows into the evaporation condensate storage tank at the lower part of the condenser, and finally the evaporation condensate is pumped out for recycling or retreatment by the evaporation condensate pump.

The vacuum system is composed of a condenser, a gas-liquid separation tank and a vacuum pump, secondary steam generated at the top of the triple-effect evaporator is condensed by the condenser, and non-condensable gas tail gas in the system is pumped out by the vacuum pump to maintain the required vacuum degree of the system.

Implement the embodiment of the utility model provides a, following beneficial effect has:

the embodiment of the utility model provides a high salt organic electroplating effluent evaporation crystallization device, this device mainly utilizes the principle of evaporation crystallization to handle this high salt organic electroplating effluent. Heavy metal wastewater is concentrated and recycled through evaporation and crystallization, and evaporated condensate water can be reused as electroplating process water.

The evaporative crystallization device for the high-salt organic electroplating wastewater adopts a process device combining three effects and thickening effect to treat the wastewater. The main purposes of evaporative crystallization are: heating the solution containing the non-volatile solute to a boiling state, so that part of the solvent is vaporized and removed, thereby improving the concentration of the solute in the solvent to crystallize, and changing the vaporized solvent into evaporated condensed water for recycling.

The high-salt organic electroplating wastewater evaporative crystallization device mainly comprises a one-effect evaporator, a two-effect evaporative crystallizer, a three-effect evaporator, a thickening evaporative crystallizer, a condenser, a saturator, a preheater, an organic matter cooler, an organic matter tank, a two-effect liquid cyclone, a thickening effect liquid cyclone, a thickener, a filter, a filtering mother liquor tank, a gas-liquid separation tank, a one-effect feed pump, a thickening effect feed pump, a two-effect crystal slurry pump, a thickening effect crystal slurry pump, a filtering mother liquor pump, an organic matter pump, an evaporative condensate pump, a vacuum pump, a pipeline, a valve and the like.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Firstly, working principle and flow:

1. material flow:

the high-salt organic electroplating wastewater is firstly pumped into a preheater through a feed pump, and is preheated by utilizing the evaporation condensate water of the triple-effect evaporator 1. And entering the triple-effect evaporator 1 after preheating is finished.

The materials entering the triple-effect evaporator are circularly heated in the triple-effect evaporator through self circulation, the materials reaching the designed boiling point complete vapor-liquid separation in the equipment, and the evaporation concentration of the materials is preliminarily completed.

The materials which primarily finish the concentration are pumped into the one-effect evaporator by the one-effect feeding pump 2, the materials are circularly heated in the one-effect evaporator through self circulation, the materials which reach the designed boiling point finish the vapor-liquid separation in the equipment, and the evaporation concentration of the materials is further finished.

The further concentrated material enters the double-effect evaporation crystallizer 3 by pressure difference, the material is circularly heated in the double-effect evaporation crystallizer through self circulation, the material reaching the designed boiling point completes the vapor-liquid separation in the equipment, when the concentration of crystal slurry in the equipment meets the requirement, the material is pumped into the double-effect liquid cyclone 5 by the double-effect crystal slurry pump 4 for separation, the material with high concentration flows into the thickener 6 for crystal-liquid separation, and the clear liquid on the upper layer of the double-effect liquid cyclone 5 flows back into the double-effect evaporation crystallizer for continuous evaporation crystallization.

The material containing salt organic matters accumulated in the double-effect evaporative crystallizer 3 is pumped into a thickening evaporative crystallizer 8 through a thickening effect feeding pump 7, the material is circularly heated in the thickening evaporative crystallizer through self circulation, the material reaching a designed boiling point completes vapor-liquid separation in equipment, when the concentration of crystal slurry in the equipment meets the requirement, the material is pumped into a thickening effect hydrocyclone 10 through a thickening effect crystal slurry pump 9 for separation, the high-concentration material flows into a thickener 6 for crystal-liquid separation, and clear liquid on the upper layer of the thickening effect hydrocyclone 10 flows back into the thickening evaporative crystallizer 8 for continuous evaporative crystallization. A large amount of salt-containing organic materials at the upper part of the liquid level of the concentration-increasing evaporative crystallizer flow into an organic material tank 11, and then are pumped out by an organic material pump 12 and cooled by an organic material cooler in the process.

The crystal slurry separated by the double-effect cyclone and the thickening effect cyclone flows into the thickener 6 to be separated, and the crystal slurry with higher concentration enters the filter 13 to be filtered and salt is removed. Supernatant liquor in the thickener and mother liquor filtered by the filter simultaneously flow into a filtering mother liquor tank 14, and then the filtering mother liquor is pumped back into the double-effect evaporation crystallizer by a filtering mother liquor pump to continuously participate in circulating evaporation crystallization.

The liquid levels of the materials in all the evaporators are automatically adjusted to control the feeding and discharging of the materials, so that the balance of the feeding and discharging of the materials is realized.

2. Heating steam flow:

raw steam from a boiler firstly heats materials in an evaporation tube pass of a first-effect evaporator shell pass, the heated materials are subjected to flash evaporation in the first-effect evaporator to perform vapor-liquid separation, generated secondary steam enters materials in a shell pass heating evaporation tube pass of a second-effect evaporation crystallizer again, the heated materials are subjected to flash evaporation in the second-effect evaporation crystallizer to perform vapor-liquid separation, the generated secondary steam enters materials in a shell pass heating evaporation tube pass of a third-effect evaporator again, the heated materials are subjected to flash evaporation in the third-effect evaporator to perform vapor-liquid separation, and the generated secondary steam finally reaches the shell pass of a condenser to be condensed.

And the other part of raw steam from the boiler enters the materials in the shell pass heating evaporation tube pass of the thickening evaporation crystallizer, the heated materials are subjected to flash evaporation in the thickening evaporation crystallizer for vapor-liquid separation, and the generated secondary steam enters the materials in the shell pass heating evaporation tube pass of the triple-effect evaporator.

3. Condensate flow:

the steam condensate water of the shell pass of the first-effect evaporator and the thickening evaporation crystallizer flows out for recycling by the pressure difference.

The evaporation condensate water of the shell pass of the two-effect evaporation crystallizer flows to the shell pass flash evaporation heat of the three-effect evaporator by pressure difference to be utilized, then the evaporation condensate water of the shell pass of the three-effect evaporator flows to an evaporation condensate water storage tank at the bottom of the condenser by pressure difference together with the condensate water of the shell pass of the three-effect evaporator, and a heat source is provided for preheating the feeding of the system by a preheater in the process. The evaporation condensate water of the shell pass of the condenser also flows into an evaporation condensate water storage tank at the lower part of the shell pass of the condenser, and is pumped out by an evaporation condensate water pump for recycling or retreatment.

4. A vacuum system:

the vacuum system consists of a condenser 15, a gas-liquid separation tank 16 and a vacuum pump 17. The condenser condenses the secondary steam generated at the top of the triple-effect evaporator, and the vacuum pump pumps out the non-condensable gas tail gas (steam, air or other non-condensable gases) in the system to maintain the vacuum degree required by the system.

5. Automatic control:

automatic control is adopted. The liquid level of each evaporator is automatically controlled by adopting a differential pressure transmitter and an electric valve, and the field display of the evaporation temperature and pressure of each effect and the remote transmission display of a control cabinet are realized. A steam flowmeter, a mother liquor feeding flowmeter and a sewage condensate flowmeter are arranged. The density of the crystal slurry liquid of the evaporator is automatically measured and displayed.

Secondly, the characteristics of the device

1. The device has mature process, does not need chemical reagents, has no secondary pollution, can recycle water and valuable heavy metals, and has higher environmental benefit and economic benefit.

2. The device has the advantages of large processing capacity, compact structure, small occupied area, convenient operation, simple and environment-friendly process and small investment.

3. The (3 + 1) effect evaporation concentration device is adopted for concentration, the process is advanced and reasonable, meanwhile, the energy is saved remarkably, and the single-effect, double-effect or triple-effect steam heat utilization rate is low in most of the traditional methods.

4. Each effect evaporation concentration unit adopts negative pressure evaporation concentration: due to negative pressure evaporation, the total heat transfer temperature difference is increased, the heat exchange efficiency of the equipment is improved, and the total engineering investment can be reduced; under the negative pressure condition, the evaporation temperature is low, the corrosion to equipment and pipelines is reduced, and the continuous and stable production can be ensured; the treatment process is operated under negative pressure, so that clean and safe production is ensured, and the environmental pollution of a workshop is reduced. The operation environment and the factory environment are greatly improved.

5. The thickening effect evaporation crystallizer is high in discharging concentration, high in boiling point and high in viscosity, adopts steam to directly heat, is high in evaporation intensity and efficiency, and reduces the external discharge of salt-containing organic matters as far as possible.

6. The device adopts the working modes of automatic control, continuous feeding and continuous discharging, and the labor intensity of workers is low.

7. Low maintenance cost: the whole device mainly comprises static equipment, pipelines, pumps, instruments and the like, and is small in daily maintenance workload and low in maintenance cost.

8. Safety and stability: the safety problem of the device is solved by the device, and the intrinsic safety requirement is met. Under normal operating mode, this device can normal stable operation. When the device is operated, the labor intensity of workers is low, and full-automatic intelligent operation can be realized.

Third, the application range of the device

The device is mainly suitable for the industries of electroplating and the like, treats the heavy metal wastewater containing chromium, copper, silver, nickel, organic matters and the like, has mature and simple process, does not need chemical reagents, has no secondary pollution, can recover water and valuable heavy metals, has good environmental benefit and economic benefit, and is one of the main device technologies for treating the high-salt organic electroplating wastewater at present.

The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the invention, which is defined by the claims and their equivalents.

Claims

1. The utility model provides a high salt organic electroplating effluent evaporation crystallization device which characterized in that: including the triple effect evaporimeter, one-effect evaporimeter and the two-effect evaporation crystallizer that connect gradually, be connected with two-effect cyclone and enrichment evaporation crystallizer on the two-effect evaporation crystallizer respectively, it is provided with the effect cyclone and the organic matter jar of thickening still to connect on the enrichment evaporation crystallizer, set gradually thickener and filter under two-effect cyclone and the effect cyclone of thickening, still include the condenser, the condenser is connected with the triple effect evaporimeter.

2. The evaporative crystallization device for high-salt organic electroplating wastewater according to claim 1, further comprising a condensation system, wherein the steam condensate of the shell pass of the first-effect evaporator and the thickening evaporative crystallizer flows out and is recycled by pressure difference, the evaporative condensate of the shell pass of the second-effect evaporative crystallizer flows into the shell pass of the third-effect evaporator by pressure difference to be used as flash evaporation heat, then the flash evaporation heat and the condensate of the shell pass of the third-effect evaporator flow into the evaporative condensate storage tank at the bottom of the condenser by pressure difference, a heat source is provided for preheating of feeding materials to the system by the preheater in the process, the evaporative condensate of the shell pass of the condenser also flows into the evaporative condensate storage tank at the lower part of the condenser, and finally the evaporative condensate is pumped out by the evaporative condensate pump for recycling or retreatment.

3. The evaporative crystallization device for high-salt organic electroplating wastewater as claimed in claim 2, further comprising a vacuum system, wherein the vacuum system is composed of a condenser, a gas-liquid separation tank and a vacuum pump, the condenser condenses secondary steam generated at the top of the triple-effect evaporator, and the vacuum pump pumps out non-condensable gas tail gas in the system to maintain the vacuum degree required by the system.