Membrane separation and concentration system for removing heavy metals in waste incineration fly ash

Abstract

The invention relates to a membrane separation and concentration system for removing heavy metals in waste incineration fly ash, and aims to solve the technical problem of poor treatment efficiency caused by only pressure pushing when the fly ash is treated by the current membrane separation, the membrane separation and concentration system comprises a sulfydryl cleaning tower, a gas inlet end of the sulfydryl cleaning tower is communicated with a fly ash discharge port, and a gas outlet end of the sulfydryl cleaning tower is communicated with a gas outlet of the sulfydryl cleaning tower. By arranging the motor, the flow divider and the limiting shell, when the motor runs, the motor can drive the driving disc to rotate through the driving shaft, so that the driving disc drives the limiting shell to rotate in the flow dividing outer shell, liquid with impurities can be reserved in the flow dividing inner pipe, and pure liquid can be injected into the first treatment tank and the second treatment tank to be gasified and then discharged; according to the system, when fly ash is treated, the condensed liquid treatment efficiency can be improved in a centrifugal acceleration mode, the flowing speed of condensed liquid in the flow divider is increased while the filtering effect on the condensed liquid is guaranteed, and then the filtering effect of the system on fly ash liquid is improved.

Description

Technical Field

[0001] The invention relates to the technical field of garbage disposal, and in particular to a membrane separation and concentration system for removing heavy metals from fly ash from garbage incineration. Background Art

[0002] With the progress of society and the improvement of people's living standards, the output of urban domestic waste has also increased dramatically. The current treatment technology mainly relies on landfill, composting and incineration. However, with the limitation of landfill and composting sites, the land shortage in many cities has led to the saturation of landfill. Waste incineration has the advantages of fast processing speed, small footprint and good reduction effect. At present, more and more urban waste in China and abroad tends to be incinerated. Japan, the United States and most European countries have generally adopted the incineration method, and the incineration rate in some countries and regions has even reached more than 90%.

[0003] At present, my country has built and put into operation more than 140 waste incineration power plants, and the total number of projects approved exceeds 400. According to the plan, by the end of 2015, the capacity of urban incineration facilities in China will reach more than 35% of the total harmless treatment capacity, and my country's waste incineration capacity will exceed 70 million tons per year. In addition, there are more than 300 medical waste incineration plants in operation in my country. However, after the incineration of domestic waste, 3-5% of fly ash will be generated, that is, the residue collected in the flue gas purification system. Because fly ash has a high concentration of heavy metals leached, my country and many countries in the world have classified waste incineration fly ash as hazardous waste, which requires safe treatment and disposal.

[0004] There are two main directions for the research on fly ash treatment technology today. One is to fix the heavy metals in the fly ash by solidification method and then landfill it, such as cement solidification technology, sintering technology, chelation technology, melt solidification, etc. The other is to dissolve and leach the heavy metals in the fly ash by leaching technology, and then use precipitation or electrolysis to recover the heavy metals. The treated fly ash does not have the risk of heavy metal leaching and can be treated as general waste or directly used as a resource. There are many studies in this area abroad.

[0005] Membrane separation technology is the fastest growing and most widely used separation technology in the past 40 years. Membrane separation is a physical process. Its basic principle is to separate or concentrate solutes, impurities, solvents, etc. in the feed liquid by using a membrane with selective permeability function under driving forces such as concentration difference, pressure difference, and potential difference. The membrane separation process is a dynamic filtration process. The separation is completed in a flowing state. The filtration and penetration of the liquid are achieved by high-speed flow and applying pressure to the inside. However, the existing membrane separation method is time-consuming, and the method of accelerating the flow of liquid by only pressurizing it is difficult to meet the efficiency of liquid filtration in actual use. In view of this, we propose a membrane separation and concentration system for removing heavy metals from waste incineration fly ash. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art, meet actual needs, and provide a membrane separation and concentration system for removing heavy metals in waste incineration fly ash, so as to solve the technical problem that the current membrane separation treatment of fly ash only relies on pressure pushing, resulting in poor treatment efficiency.

[0007] In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is: designing a membrane separation and concentration system for removing heavy metals in waste incineration fly ash, including a mercapto cleaning tower, the air inlet end of the mercapto cleaning tower is connected to the fly ash discharge port, the other end of the mercapto cleaning tower is connected to a water washing tower, the water washing tower filter is connected, the filter is connected to a gas-liquid separator, the exhaust end of the gas-liquid separator is connected to a condenser, the condenser receives cold air through a refrigerator and is connected to a membrane separation system, the refrigerator is connected to a first liquid storage tank, the membrane separation system is respectively connected to the gas-liquid separator and a first treatment tank, the first treatment tank and the second treatment tank are both connected to a fan, the first liquid storage tank is connected to a solvent stratification tank, the solvent stratification tank is connected to a second liquid storage tank, and the second liquid storage tank is connected to a cooler.

[0008] Wherein, the chiller is connected to an external cold liquid device to circulate cold water; Wherein, the membrane separation system is connected to the gas-liquid separator through a waste liquid pipe, and the membrane separation system is connected to the first treatment tank through an annular pipe; Wherein, the second processing tank is connected to an external steam generator.

[0009] Preferably, the membrane separation system comprises: A housing assembly, comprising a flow splitter housing, a limiting housing arranged in the flow splitter housing, a flow splitter, a sealing housing and a connector, wherein the flow splitter is located in a mounting groove provided in the limiting housing, the sealing housing is connected to the flow splitter, and the sealing housing is connected to a connecting pipe via a connector; and A driving assembly includes an air pump, an aerator connected to the air pump, a transmission shaft, a transmission wheel and a motor, wherein one end of the transmission shaft is arranged in the aerator, and the transmission wheel is connected to the motor through the transmission wheel and a transmission belt; and, The diversion component includes a sealing disk, a limiting ring arranged outside the sealing disk, a waste liquid pipe, a liquid guide tube, a waste liquid pipe and an annular tube, wherein the waste liquid pipe and the liquid guide tube are both connected to the sealing disk, the waste liquid pipe is connected to the annular tube, and the liquid guide tube is connected to the waste liquid pipe.

[0010] Preferably, the limit shell is rotatably connected in the diverter shell, the number of the mounting grooves is several, and the several mounting grooves are all opened on one side of the limit shell, the inner walls of the several mounting grooves are overlapped with the several diverters respectively, one side of the diverter is connected with the connector through the sealing shell, and the other end of the several connectors is connected with the same connecting pipe, the connecting pipe is annular, and the connecting pipe is composed of two groups of left-right symmetrical circular tubes.

[0011] Preferably, the flow splitter comprises a flow splitting outer tube, a plurality of filter membranes are arranged in the flow splitting outer tube, and the plurality of filter membranes are sequentially sleeved on the outside of the flow splitting inner tube, the flow splitting inner tube is fixedly connected to the flow splitting outer tube through a bracket, and the flow splitting inner tube is connected to the filter membranes through a leak hole; One end of the flow-dividing outer tube is communicated with the sealing shell, and the flow-dividing outer tube is clamped in the installation groove.

[0012] Preferably, the exhaust end of the air pump is connected to the aerator through a pipeline, a mounting frame is fixedly connected to the outside of the aerator, one end of the transmission shaft is located inside the aerator, and the other end of the transmission shaft is transmission-connected to one of the transmission wheels. There are two transmission wheels, and the same transmission belt is wrapped around the two transmission wheels.

[0013] Preferably, an aeration pipe is fixedly connected to the outside of the aerator, two transmission wheels are connected by the same transmission belt, the transmission wheel located below is connected to the driving shaft of the motor, a support frame is fixedly connected below the connection, and the driving shaft of the motor passes through the transmission wheel and is fixedly connected to the driving disc.

[0014] Preferably, the air pump is fixedly connected to the top of the diversion shell, the mounting bracket is fixedly connected to the outside of the connecting pipe, the mounting bracket is fixedly connected to the outer waste liquid pipe constituting the connecting pipe, the support frame is fixedly connected to one side of the diversion shell, one side of the drive disk is fixedly connected to the side corresponding to the limit shell, and the aerator is connected to the outer circular ring tube constituting the connecting pipe through the aeration pipe.

[0015] Preferably, the aerator comprises an aeration shell, the lower part of which is connected to the exhaust shell, a sealing block is clamped in the aeration shell, the shape of the sealing block matches the shape of the inner wall of the exhaust shell, an aeration groove is provided on one side of the sealing block, and bearings are clamped on both sides of the inner wall of the exhaust shell; The inner wall of the sealing block is fixedly connected to the transmission shaft, and two bearings are sleeved outside the transmission shaft. The top of the aeration shell is connected to the air pump through a pipeline, and one side of the exhaust shell is connected to the corresponding end of the aeration pipe.

[0016] Preferably, a limiting ring is tightly welded outside the sealing disk, and a plurality of waste liquid pipes and a plurality of liquid guide tubes are fixedly connected to the outside of the sealing disk, and the plurality of annular tubes and the plurality of liquid guide tubes are all connected to the sealing disk, the waste liquid pipe is located inside the liquid guide tube, and the other end of the waste liquid pipe passes through the liquid guide tube and is connected to the annular tube, and a plurality of liquid guide tubes are connected to the same guide tube, and the guide tube consists of two circular ring tubes that are symmetrical on the left and right.

[0017] Preferably, the sealing disk is clamped on the back of the diverter shell, the limiting ring is clamped in the limiting groove opened on the back of the diverter shell, the waste liquid pipe is connected with the diverter inner tube of the diverter in the installation groove, the liquid guide tube is connected with the filter membrane of the diverter in the installation groove, and the diverter tube and the liquid guide tube are respectively clamped inside the diverter inner tube and outside the diverter outer tube.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The membrane separation and concentration system for removing heavy metals in fly ash from garbage incineration is provided with a motor, a diverter and a limit shell. When the motor is running, the motor drives the driving disk to rotate through the driving shaft, so that the driving disk drives the limit shell to rotate in the diverter outer shell, so that the condensed liquid flowing in the diverter will quickly flow to the filter membrane through the leakage holes provided in the diverter inner tube under the action of centrifugal force, and the pure liquid after filtering by the filter membrane will flow between the diverter outer shell and the filter membrane through the filter membrane, while the liquid with impurities will be retained in the diverter inner tube, and the pure liquid will be injected into the first treatment tank and the second treatment tank for gasification and discharge, so that the system can improve the treatment efficiency of the condensed liquid by centrifugal acceleration when treating the fly ash, and accelerate the flow speed of the condensed liquid in the diverter while ensuring the filtering effect of the condensed liquid, thereby improving the filtering effect of the system on the fly ash liquid.

[0019] 2. The membrane separation and concentration system for removing heavy metals in fly ash from garbage incineration is provided with a motor, an air pump and an aerator. When the air pump is running, the motor continuously runs, so that the motor drives the transmission shaft to rotate through the transmission wheel and the transmission belt. When the aeration groove on the surface of the sealing block is located at the air outlet where the aeration pipe and the exhaust shell are connected, the aeration shell will be in a connected state with the aeration pipe, and the gas accumulated in the aeration shell will quickly flow into the aeration pipe, so that the aeration pipe will discharge the instantly enhanced air pressure into the connecting pipe, so that when the system processes the condensed liquid, on the one hand, the efficiency of processing the condensed liquid can be accelerated by the motor driving several diverters to rotate centrifugally, and on the other hand, the motor manages the air pump to intermittently discharge gas into the diverter, thereby accelerating the flow rate of the condensed liquid in the connecting pipe, the connector, the sealing shell and the diverter, and further improving the system's processing efficiency for the condensed liquid.

[0020] 3. The membrane separation and concentration system for removing heavy metals in fly ash from waste incineration is provided with a waste liquid pipe, a liquid guide pipe, a flow guide pipe and a ring pipe. Since the waste liquid pipe is connected to the ring pipe, waste liquid collected by different diverters can be centrally processed. At the same time, since the liquid guide pipe is connected to the flow guide pipe, the collected pure liquid is centrally collected, so that the processed liquid can be classified and processed after the liquid is processed, so as to avoid mixing of the processed liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a system architecture block diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the membrane separation system of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the membrane separation system of the present invention; Figure 4 It is a schematic diagram of the structure of the driving assembly of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the aerator of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the flow diversion component of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the diverter of the present invention; In the figure: 1, mercapto cleaning tower; 2, water washing tower; 3, filter; 4, gas-liquid separator; 5, condenser; 6, refrigerator; 7, membrane separation system; 8, first liquid storage tank; 9, second liquid storage tank; 10, solvent separation tank; 11, cooler; 12, first treatment tank; 13, second treatment tank; 701, housing assembly; 702, drive assembly; 703, flow diversion assembly; 701-1, flow dividing shell; 701-2, limit shell; 701-3, installation groove; 701-4, flow divider; 701-5, sealing shell; 701-6, connector; 701-7, connecting pipe; 701-401, shunt outer tube; 701-402, filter membrane; 701-403, bracket; 701-404, shunt inner tube; 701-405, leak hole; 702-1, air pump; 702-2, aerator; 702-3, mounting frame; 702-4, transmission shaft; 702-5, transmission wheel; 702-6, transmission belt; 702-7, motor; 702-8, support frame; 702-9, drive disc; 702-10, aeration pipe; 702-201, aeration shell; 702-202, exhaust shell; 702-203, sealing block; 702-204, aeration tank; 702-205, bearing; 703-1, sealing disk; 703-2, limiting ring; 703-3, waste liquid pipe; 703-4, liquid guide pipe; 703-5, flow guide pipe; 703-6, annular pipe. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments: Example: A membrane separation method for removing heavy metals from fly ash from waste incineration, see Figure 1 , including a mercapto cleaning tower 1, the air inlet end of the mercapto cleaning tower 1 is connected to the fly ash discharge port, the other end of the mercapto cleaning tower 1 is connected to a water washing tower 2, the water washing tower 2 is connected to a filter 3, the filter 3 is connected to a gas-liquid separator 4, the exhaust end of the gas-liquid separator 4 is connected to a condenser 5, the condenser 5 receives cold air through a refrigerator 6 and is connected to a membrane separation system 7, the refrigerator 6 is connected to a first liquid storage tank 8, the membrane separation system 7 is respectively connected to the gas-liquid separator 4 and a first treatment tank 12, the first treatment tank 12 and the second treatment tank 13 are both connected to a fan, the first liquid storage tank 8 is connected to a solvent stratification tank 10, the solvent stratification tank 10 is connected to a second liquid storage tank 9, and the second liquid storage tank 9 is connected to a cooler 11.

[0023] Among them, the refrigerator 6 is connected to the external cold liquid device to circulate cold water; The membrane separation system 7 is connected to the gas-liquid separator 4 through the waste liquid pipe 703-3, and the membrane separation system 7 is connected to the first treatment tank 12 through the annular pipe 703-6; The second processing tank 13 is connected to an external steam generator.

[0024] A membrane separation concentration system for removing heavy metals from fly ash from waste incineration, see Figures 2 to 7 , the membrane separation system 7 comprises, The housing assembly 701 includes a flow splitter housing 701-1, a limiting housing 701-2 disposed in the flow splitter housing 701-1, a flow splitter 701-4, a sealing housing 701-5 and a connector 701-6, wherein the flow splitter 701-4 is located in a mounting groove 701-3 provided in the limiting housing 701-2, the sealing housing 701-5 is connected to the flow splitter 701-4, and the sealing housing 701-5 is connected to the connecting pipe 701-7 via the connector 701-6; and, The driving assembly 702 includes an air pump 702-1, an aerator 702-2 connected to the air pump 702-1, a transmission shaft 702-4, a transmission wheel 702-5 and a motor 702-7, wherein one end of the transmission shaft 702-4 is disposed in the aerator 702-2, and the transmission wheel 702-5 is connected to the motor 702-7 via the transmission wheel 702-5 and a transmission belt 702-6; and, The flow dividing component 703 includes a sealing disk 703-1, a limiting ring 703-2 arranged outside the sealing disk 703-1, a waste liquid pipe 703-3, a liquid guiding pipe 703-4, a waste liquid pipe 703-3 and an annular pipe 703-6, wherein the waste liquid pipe 703-3 and the liquid guiding pipe 703-4 are both connected to the sealing disk 703-1, the waste liquid pipe 703-3 is connected to the annular pipe 703-6, and the liquid guiding pipe 703-4 is connected to the waste liquid pipe 703-3. By setting a motor 702-7, a diverter 701-4 and a limiting shell 701-2, when the motor 702-7 is running, the motor 702-7 will drive the driving disk 702-9 to rotate through the driving shaft, so that the driving disk 702-9 drives the limiting shell 701-2 to rotate in the flow dividing shell 701-1, so that the liquid flowing in the diverter 701 -4 will quickly flow to the filter membrane 701-402 through the leakage hole 701-405 set in the shunt inner tube 701-404 under the action of centrifugal force. After being filtered by the filter membrane 701-402, the pure liquid will flow between the shunt outer shell 701-1 and the filter membrane 701-402 through the filter membrane 701-402, and the liquid with impurities will be retained in the shunt inner tube 701-404. The pure liquid will be injected into the first treatment tank 12 and the second treatment tank 13 for gasification and then discharged, so that the system can improve the treatment efficiency of the condensed liquid by centrifugal acceleration when treating the fly ash, while ensuring the filtering effect of the condensed liquid, while accelerating the flow speed of the condensed liquid in the diverter 701-4, thereby improving the filtering effect of the system on the fly ash liquid.

[0025] Furthermore, the limiting shell 701-2 is rotatably connected in the diverter shell 701-1, and the number of mounting grooves 701-3 is several, and the several mounting grooves 701-3 are all opened on one side of the limiting shell 701-2. The inner walls of the several mounting grooves 701-3 are overlapped with the several diverters 701-4 respectively, and one side of the diverter 701-4 is connected with the connector 701-6 through the sealing shell 701-5. The other ends of the several connectors 701-6 are connected with the same connecting pipe 701-7. The connecting pipe 701-7 is annular, and the connecting pipe 701-7 is composed of two groups of left-right symmetrical circular tubes. By setting a plurality of mounting grooves 701-3, the system can increase the metering of wastewater treatment in a single wastewater treatment, thereby improving the treatment efficiency of the system.

[0026] Furthermore, the diverter 701-4 includes a diverter outer tube 701-401, in which a plurality of filter membranes 701-402 are arranged, and the plurality of filter membranes 701-402 are sequentially sleeved on the outside of the diverter inner tube 701-404, the diverter inner tube 701-404 is fixedly connected to the diverter outer tube 701-401 through a bracket 701-403, the diverter inner tube 701-404 is connected to the filter membrane 701-402 through a leak hole 701-405, one end of the diverter outer tube 701-401 is connected to the sealing shell 701-5, the diverter outer tube 701-401 is clamped in the mounting groove 701-3, and through the cooperation of the plurality of filter membranes 701-402, a perfect filtering effect is achieved on the impurities in the waste liquid, thereby avoiding the mixing of impurities with gas and liquid.

[0027] It is worth noting that the exhaust end of the air pump 702-1 is connected to the aerator 702-2 through a pipeline, the aerator 702-2 is fixedly connected to the mounting frame 702-3, one end of the transmission shaft 702-4 is located in the aerator 702-2, and the other end of the transmission shaft 702-4 is connected to one of the transmission wheels 702-5. There are two transmission wheels 702-5, and the two transmission wheels 702-5 are wrapped with the same transmission belt 702-6. The aerator 702-2 is fixedly connected to the aeration pipe 702-10. The two transmission wheels 702-5 are connected to the aerator 702-2. The driving wheel 702-5 is connected through the same transmission belt 702-6, and the transmission wheel 702-5 located below is connected to the driving shaft of the motor 702-7. A support frame 702-8 is fixedly connected below the connection. The driving shaft of the motor 702-7 passes through the transmission wheel 702-5 and is fixedly connected to the driving disk 702-9. Through the arrangement of the transmission wheel 702-5 and the transmission shaft 702-4, the system can synchronously adjust the output of the air pump 702-1 when the motor 702-7 is running, thereby reducing the difficulty of using the system.

[0028] It is worth noting that the air pump 702-1 is fixedly connected to the top of the flow dividing shell 701-1, the mounting frame 702-3 is fixedly connected to the outside of the connecting pipe 701-7, the mounting frame 702-3 is fixedly connected to the outer waste liquid pipe 703-3 constituting the connecting pipe 701-7, the support frame 702-8 is fixedly connected to one side of the flow dividing shell 701-1, one side of the driving disk 702-9 is fixedly connected to the corresponding side of the limiting shell 701-2, and the aerator 70 2-2 is connected to the outer annular tube of the connecting tube 701-7 through the aeration tube 702-10, and the motor 702-7, the air pump 702-1 and the aerator 702-2 are arranged. When the air pump 702-1 is running, the motor 702-7 is continuously running, so that the motor 702-7 drives the transmission shaft 702-4 to rotate through the transmission wheel 702-5 and the transmission belt 702-6. When the aeration groove 702-203 on the surface of the sealing block 702-203 is -204 is located at the air outlet where the aeration pipe 702-10 and the exhaust shell 702-202 are connected, the aeration shell 702-201 will be in a connected state with the aeration pipe 702-10, and the gas accumulated in the aeration shell 702-201 will quickly flow into the aeration pipe 702-10, so that the aeration pipe 702-10 will discharge the instantly enhanced air pressure into the connecting pipe 701-7, so that when the system processes the condensed liquid, on the one hand, the motor 702-7 can drive several diverters 701-4 to rotate centrifugally to speed up the processing efficiency of the condensed liquid, and on the other hand, the motor 702-7 manages the air pump 702-1 to intermittently discharge gas into the diverter 701-4, thereby accelerating the flow speed of the condensed liquid in the connecting pipe 701-7, the connector 701-6, the sealing shell 701-5 and the diverter 701-4, and further improving the system's processing efficiency for the condensed liquid.

[0029] It is worth mentioning that the aerator 702-2 includes an aeration shell 702-201, the lower part of the aeration shell 702-201 is connected to the exhaust shell 702-202, a sealing block 702-203 is clamped in the aeration shell 702-201, the shape of the sealing block 702-203 is adapted to the shape of the inner wall of the exhaust shell 702-202, an aeration groove 702-204 is provided on one side of the sealing block 702-203, bearings 702-205 are clamped on both sides of the inner wall of the exhaust shell 702-202, the inner wall of the sealing block 702-203 is fixedly connected to the transmission shaft 702-4, and the two shafts The bearings 702-205 are all sleeved on the outside of the transmission shaft 702-4, and the top of the aeration shell 702-201 is connected to the air pump 702-1 through a pipeline, and one side of the exhaust shell 702-202 is connected to the corresponding end of the aeration pipe 702-10. Through the arrangement of the aeration shell 702-201 and the sealing block 702-203, the system can be connected with the aeration shell 702-201 through the exhaust shell 702-202 during the rotation of the aeration groove 702-204 on the surface of the sealing shell 701-5, so as to quickly discharge the gas and avoid the difficulty in accelerating the circulation of the liquid due to the normal pressure state.

[0030] It is worth emphasizing that the sealing disk 703-1 is tightly welded with a limiting ring 703-2, and the sealing disk 703-1 is fixedly connected with a plurality of waste liquid pipes 703-3 and a plurality of liquid guide pipes 703-4, and a plurality of annular pipes 703-6 and a plurality of liquid guide pipes 703-4 are all connected with the sealing disk 703-1, the waste liquid pipe 703-3 is located in the liquid guide pipe 703-4, and the other end of the waste liquid pipe 703-3 passes through the liquid guide pipe 703-4 and is connected with the annular pipe 703-6, and a plurality of liquid guide pipes 703-4 are connected with the same guide pipe 703-5, and the guide pipes 703-5 is composed of two circular tubes that are symmetrical on the left and right. By setting up a waste liquid pipe 703-3, a liquid guide pipe 703-4, a flow guide pipe 703-5 and a ring pipe 703-6, and because the waste liquid pipe 703-3 is connected to the ring pipe 703-6, the waste liquid collected by different diverters 701-4 can be centrally processed. At the same time, because the liquid guide pipe 703-4 is connected to the flow guide pipe 703-5, the collected pure liquid is centrally collected, so that the processed liquid can be classified and processed after the liquid is processed, avoiding the mixing of the processed liquid.

[0031] In addition, the sealing disk 703-1 is clamped on the back of the diverter housing 701-1, the limiting ring 703-2 is clamped in the limiting groove opened on the back of the diverter housing 701-1, the waste liquid pipe 703-3 is connected to the diverter inner pipe 701-404 of the diverter 701-4 in the installation groove 701-3, the liquid guide pipe 703-4 is connected to the filter membrane 701-402 of the diverter 701-4 in the installation groove 701-3, and the diverter pipe 703-5 and the liquid guide pipe 703-4 are respectively clamped in the diverter inner pipe 701-404 and the diverter outer pipe 701-4 01, because the annular tube 703-6 and the connecting tube 701-7 are composed of two symmetrical circular tubes, the connecting tube 701-7 and the annular tube 703-6 close to the outer shell component 701 will be in a fixed state with the connector 701-6 and the waste liquid pipe 703-3, while the connecting tube 701-7 away from the outer shell component 701 can rotate. When the limiting shell 701-2 rotates, the outer connecting tube 701-7 and the annular tube 703-6 will be in a relatively fixed state, ensuring the stability of the connection with other external pipelines.

[0032] Working principle: When in use, the fly ash generated during the incineration of garbage is injected into the mercapto cleaning tower 1, the fly ash is subjected to heavy metal adsorption by the mercapto cleaning tower 1 and injected into the water washing tower 2, the fly ash and the liquid are mixed by water washing, and then the liquid mixed with the fly ash is injected into the filter 3 for coarse filtration, the filtered liquid is injected into the gas-liquid separator 4, the liquid is discharged and the gas with impurities is injected, the condenser 5 is cooled and solidified, the obtained condensed liquid is injected into the membrane separation system 7 for membrane separation treatment, so that the liquid with impurities enters the filter 3 again for circulation treatment, and the liquid that can be discharged after treatment is injected into the first treatment tank 12 and the second treatment tank 13 for gasification and then discharged, the refrigerator 6 will inject the condensed liquid with reduced temperature into the first liquid storage tank 8 and the second liquid storage tank 9, and cool it through the cooler 11 and then recycle it for use; When the condensed liquid is injected into the membrane separation system 7, the condensed liquid will be injected into the outer half of the annular tube constituting the connecting tube 701-7, and then the condensed liquid will quickly enter the diverter 701-4 through the connector 701-6 and the sealing shell 701-5. At this time, it is necessary to start the motor 702-7 and the air pump 702-1. When the motor 702-7 is running, the motor 702-7 will drive the driving disk 702-9 to rotate through the driving shaft, so that the driving disk 702-9 drives the limiting shell 701-2 to rotate in the diverter outer shell 701-1, so that the condensed liquid flowing in the diverter 701-4 will pass through the leakage hole 701-4 set in the diverter inner tube 701-404 under the action of centrifugal force. 405 quickly flows to the filter membrane 701-402, and the pure liquid after being filtered by the filter membrane 701-402 will flow between the split housing 701-1 and the filter membrane 701-402 through the filter membrane 701-402, while the liquid with impurities will be retained in the split inner tube 701-404, and then the pure liquid will enter the guide tube 703-5 through the liquid guide tube 703-4, and the liquid with impurities will flow to the annular tube 703-6 through the waste liquid tube 703-3. Since the annular tube 703-6 is connected to the filter 3 through a pipeline, the liquid with impurities is processed again, and the pure liquid will be injected into the first processing tank 12 and the second processing tank 13 for gasification and discharge; When the air pump 702-1 is running, since the motor 702-7 is running continuously, the motor 702-7 will drive the transmission shaft 702-4 to rotate through the transmission wheel 702-5 and the transmission belt 702-6. Since the transmission shaft 702-4 is located in the exhaust shell 702-202 and the sealing block 702-203 is arranged outside the transmission shaft 702-4, the sealing block 702-203 will seal the outlet where the exhaust shell 702-202 is connected to the aeration pipe 702-10. As the transmission shaft 702-4 drives the sealing block 702-203 to rotate, when the sealing block 702- When the aeration groove 702-204 on the surface of 203 is located at the air outlet where the aeration pipe 702-10 and the exhaust shell 702-202 are connected, the aeration shell 702-201 will be in a connected state with the aeration pipe 702-10. At this time, the gas accumulated in the aeration shell 702-201 will quickly flow into the aeration pipe 702-10, so that the aeration pipe 702-10 will discharge the instantly enhanced air pressure into the connecting pipe 701-7, thereby promoting the connecting pipe 701-7, the connector 701-6, the sealing shell 701-5 and the condensed liquid in the diverter 701-4 to accelerate the flow.

[0033] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A membrane separation method for removing heavy metals from waste incineration fly ash, characterized in that: The invention comprises a mercapto cleaning tower (1), wherein an air inlet end of the mercapto cleaning tower (1) is connected to a fly ash discharge outlet, and the other end of the mercapto cleaning tower (1) is connected to a water washing tower (2), and the water washing tower (2) is connected to a filter (3), and the filter (3) is connected to a gas-liquid separator (4), and an exhaust end of the gas-liquid separator (4) is connected to a condenser (5), and the condenser (5) receives cold air through a refrigerator (6) and is connected to a membrane separation system (7), and the refrigerator (6) is connected to a first liquid storage tank (8), and the membrane separation system (7) is respectively connected to the gas-liquid separator (4) and a first treatment tank (12), and the first treatment tank (12) and the second treatment tank (13) are both connected to a fan, and the first liquid storage tank (8) is connected to a solvent stratification tank (10), and the solvent stratification tank (10) is connected to a second liquid storage tank (9), and the second liquid storage tank (9) is connected to a cooler (11); Wherein, the refrigerator (6) is connected to an external cooling liquid device to circulate cold water; The membrane separation system (7) is connected to the gas-liquid separator (4) via a waste liquid pipe (703-3), and the membrane separation system (7) is connected to the first treatment tank (12) via a ring pipe (703-6); The second processing tank (13) is connected to an external steam generator.

2. The membrane separation concentration system for removing heavy metals from waste incineration fly ash according to claim 1, characterized in that: The membrane separation system (7) comprises: A housing assembly (701) comprises a flow splitting housing (701-1), a limiting housing (701-2) arranged in the flow splitting housing (701-1), a flow splitter (701-4), a sealing housing (701-5) and a connector (701-6), wherein the flow splitter (701-4) is located in a mounting groove (701-3) provided in the limiting housing (701-2), the sealing housing (701-5) is connected to the flow splitter (701-4), and the sealing housing (701-5) is connected to a connecting pipe (701-7) via a connector (701-6); and, A drive assembly (702) comprises an air pump (702-1), an aerator (702-2) connected to the air pump (702-1), a transmission shaft (702-4), a transmission wheel (702-5) and a motor (702-7), wherein one end of the transmission shaft (702-4) is arranged in the aerator (702-2), and the transmission wheel (702-5) is connected to the motor (702-7) via the transmission wheel (702-5) and a transmission belt (702-6); and, The flow diversion component (703) comprises a sealing disk (703-1), a limiting ring (703-2) arranged outside the sealing disk (703-1), a waste liquid tube (703-3), a liquid guide tube (703-4), a waste liquid tube (703-3) and an annular tube (703-6), wherein the waste liquid tube (703-3) and the liquid guide tube (703-4) are both connected to the sealing disk (703-1), the waste liquid tube (703-3) is connected to the annular tube (703-6), and the liquid guide tube (703-4) is connected to the waste liquid tube (703-3).

3. The membrane separation concentration system for removing heavy metals from waste incineration fly ash according to claim 2, characterized in that: The limiting shell (701-2) is rotatably connected in the flow diverter shell (701-1); the number of the mounting grooves (701-3) is multiple, and the multiple mounting grooves (701-3) are all opened on one side of the limiting shell (701-2); the inner walls of the multiple mounting grooves (701-3) are overlapped with the multiple flow diverters (701-4) respectively; one side of the flow diverter (701-4) is connected to the connector (701-6) through the sealing shell (701-5); the other ends of the multiple connectors (701-6) are connected to the same connecting pipe (701-7); the connecting pipe (701-7) is annular and is composed of two groups of circular ring pipes that are symmetrical to each other.

4. The membrane separation concentration system for removing heavy metals from waste incineration fly ash according to claim 3, characterized in that: The flow splitter (701-4) comprises a flow splitting outer tube (701-401), a plurality of filter membranes (701-402) are arranged inside the flow splitting outer tube (701-401), and the plurality of filter membranes (701-402) are sleeved on the outside of the flow splitting inner tube (701-404) in sequence, the flow splitting inner tube (701-404) is fixedly connected to the flow splitting outer tube (701-401) via a bracket (701-403), and the flow splitting inner tube (701-404) is connected to the filter membranes (701-402) via a leak hole (701-405); One end of the flow-dividing outer tube (701-401) is connected to the sealing shell (701-5), and the flow-dividing outer tube (701-401) is clamped in the installation groove (701-3).

5. The membrane separation concentration system for removing heavy metals from waste incineration fly ash according to claim 4, characterized in that: The exhaust end of the air pump (702-1) is connected to the aerator (702-2) via a pipeline; a mounting frame (702-3) is fixedly connected to the outside of the aerator (702-2); one end of the transmission shaft (702-4) is located inside the aerator (702-2); the other end of the transmission shaft (702-4) is transmission-connected to one of the transmission wheels (702-5); there are two transmission wheels (702-5), and the same transmission belt (702-6) is wound around the two transmission wheels (702-5).

6. The membrane separation concentration system for removing heavy metals from waste incineration fly ash according to claim 5, characterized in that: An aeration pipe (702-10) is fixedly connected to the outside of the aerator (702-2); two transmission wheels (702-5) are transmission-connected via a same transmission belt (702-6); the transmission wheel (702-5) located below is transmission-connected to the drive shaft of the motor (702-7); a support frame (702-8) is fixedly connected below the connection; and the drive shaft of the motor (702-7) passes through the transmission wheel (702-5) and is fixedly connected to the drive disc (702-9).

7. The membrane separation concentration system for removing heavy metals from waste incineration fly ash according to claim 6, characterized in that: The air pump (702-1) is fixedly connected to the top of the flow-dividing shell (701-1); the mounting frame (702-3) is fixedly connected to the outside of the connecting pipe (701-7); the mounting frame (702-3) is fixedly connected to an outer waste liquid pipe (703-3) constituting the connecting pipe (701-7); the support frame (702-8) is fixedly connected to one side of the flow-dividing shell (701-1); one side of the driving disk (702-9) is fixedly connected to a side corresponding to the limiting shell (701-2); and the aerator (702-2) is connected to an outer circular ring pipe constituting the connecting pipe (701-7) via an aeration pipe (702-10).

8. The membrane separation concentration system for removing heavy metals from waste incineration fly ash according to claim 7, characterized in that: The aerator (702-2) comprises an aeration shell (702-201), the lower part of the aeration shell (702-201) is connected to the exhaust shell (702-202), a sealing block (702-203) is clamped in the aeration shell (702-201), the shape of the sealing block (702-203) is matched with the shape of the inner wall of the exhaust shell (702-202), an aeration groove (702-204) is provided on one side of the sealing block (702-203), and bearings (702-205) are clamped on both sides of the inner wall of the exhaust shell (702-202); The inner wall of the sealing block (702-203) is fixedly connected to the transmission shaft (702-4), the two bearings (702-205) are sleeved outside the transmission shaft (702-4), the top of the aeration shell (702-201) is connected to the air pump (702-1) through a pipeline, and one side of the exhaust shell (702-202) is connected to a corresponding end of the aeration pipe (702-10).

9. The membrane separation concentration system for removing heavy metals from waste incineration fly ash according to claim 8, characterized in that: The sealing disk (703-1) is tightly welded with a limiting ring (703-2) on the outside, and a plurality of waste liquid tubes (703-3) and a plurality of liquid guide tubes (703-4) are fixedly connected to the outside of the sealing disk (703-1), and a plurality of annular tubes (703-6) and a plurality of liquid guide tubes (703-4) are all connected to the sealing disk (703-1), the waste liquid tube (703-3) is located inside the liquid guide tube (703-4), and the other end of the waste liquid tube (703-3) passes through the liquid guide tube (703-4) and is connected to the annular tube (703-6), and the plurality of liquid guide tubes (703-4) are connected to the same guide tube (703-5), and the guide tube (703-5) is composed of two circular tubes that are symmetrical on the left and right.

10. The membrane separation concentration system for removing heavy metals from waste incineration fly ash according to claim 9, characterized in that: The sealing disk (703-1) is clamped on the back of the flow diversion housing (701-1), the limiting ring (703-2) is clamped in a limiting groove opened on the back of the flow diversion housing (701-1), the waste liquid pipe (703-3) is connected to the flow diversion inner pipe (701-404) of the flow diverter (701-4) in the installation groove (701-3), the liquid guide pipe (703-4) is connected to the filter membrane (701-402) of the flow diverter (701-4) in the installation groove (701-3), and the flow guide pipe (703-5) and the liquid guide pipe (703-4) are respectively clamped in the flow diversion inner pipe (701-404) and outside the flow diversion outer pipe (701-401).

Images