CN106521531B - Continuous annealing and/or washing section of galvanized set recycle of alkali liquor method and apparatus - Google Patents

Abstract

The invention provides a method and a device for recovering lye in the cleaning section of a continuous annealing and/or galvanizing unit. The device includes a magnetic filter unit, an lye collecting unit, an lye sedimentation purification unit, and an lye storage unit. The filter unit has magnetic filtering, spraying and scraping components; the collection unit collects the lye or desalted water sprayed by the spraying component; the purification unit accepts the lye overflowed from the first overflow part, and the purification unit includes There are more than two stages of settling chambers; the storage unit communicates with the last stage of the settling chamber of the purification unit. The invention can improve the cleanliness of the lye, ensure strip steel cleaning, scrubbing and the amount of electrolyte, alleviate the maintenance frequency of the rollers of the continuous annealing unit, reduce the abnormal consumption of lye, improve the flushing effect and reduce the consumption of desalinated water, and improve the circulation system of the cleaning section Adjustment and operability; ensure the commissioning and use quality of the PALL ceramic membrane degreasing system, and then better meet the production requirements of the cleaning process of the continuous annealing unit.

Description

Alkali recovery method and device in cleaning section of continuous annealing and/or galvanizing unit

technical field

The present invention relates to the technical field of cold-rolled strip technology, in particular, relates to a recovery and utilization device for lye in the cleaning section of the continuous annealing and/or galvanizing unit in the cold-rolled strip technology, and can be used for the recovery of cold The invention relates to a method for recycling the lye in the cleaning section of the continuous annealing and/or galvanizing line in the strip rolling process.

Background technique

At present, in the continuous annealing and galvanizing unit of the typical cold-rolled strip process, the cleaning section is one of the core equipment, and the cleaning before annealing is an important link in the production of the continuous annealing unit. The surface state and cleanliness of the strip before annealing have an important influence on the surface quality of the product, the coating quality of the galvanized sheet and the maintenance frequency of the rolls of the whole line. There are always some rolling oil, iron powder and other pollutants on the surface of the strip after cold rolling. Before entering the annealing furnace, the surface must be cleaned to remove the residue on the surface of the strip. The cleaning medium in the cleaning section is lye, whether it can effectively separate the iron-containing sludge in the lye; it is related to whether it can effectively reduce the consumption of lye, reduce energy consumption, and whether it can effectively improve the cleaning of lye degree and other issues. These will directly affect the commissioning and use quality of the PALL ceramic membrane degreasing system, as well as the cleaning quality of the strip and the maintenance frequency of the entire line of rollers.

Generally speaking, in the continuous annealing and galvanizing units of a typical cold-rolled strip process, the cleaning section can usually be equipped with 1# spraying section, 1# brushing section and 1# circulation system, 2# spraying section and 2# The medium used in the scrubbing section, 2# circulation system, electrolytic cleaning section and 3# circulation system is lye. The lye is lifted by the action of the centrifugal circulation pump and then sprayed onto the surface of the strip through the nozzle for spray cleaning, brushing and cleaning. After electrolysis, the cleaned lye is returned to the circulation tank of the circulation system.

For the cleaned lye, which contains a large amount of magnetic solid matter (for example, iron-containing sludge), in order to be able to recycle the lye, the magnetic solid matter must be filtered therein. The inventors have found that the magnetic solid matter in the cleaned lye can be filtered through a filter device, however, how to effectively filter the magnetic solid matter in the cleaned lye at low cost, continuously and efficiently, and how to Purification and recovery of the cleaning solution (for example, lye and desalinated water) containing filter residues (for example, iron-containing sludge) obtained by spraying and cleaning the filter device needs further study.

Contents of the invention

The purpose of the present invention is to solve at least one of the above-mentioned deficiencies in the prior art.

For example, one of the objectives of the present invention is to provide a low-cost, continuous and efficient device and method for effectively filtering magnetic solid substances in the cleaned lye. Another object of the present invention is to provide a low-cost, continuous and efficient purification of the lye produced by the cleaning section, and further purify and reclaim the filter residue (for example, iron-containing sludge) obtained from the spray cleaning filter device Apparatus and methods for cleaning liquids (for example, lye and demineralized water).

In order to achieve the above object, one aspect of the present invention provides an alkali recovery device in the cleaning section of a continuous annealing and/or galvanizing line. The lye recovery device in the cleaning section includes a magnetic filter unit, an lye collection unit, an lye sedimentation purification unit, and an lye storage unit. Wherein, the magnetic filter unit has a magnetic filter member, a spray member and a scraper member, the magnetic filter member absorbs the magnetic solid matter in the alkali liquor flowing through the cleaning section of the magnetic filter unit, and the scraper member can absorb the magnetic solid matter in the magnetic filter unit. The magnetic solid matter on the component is scraped off, and the spraying component can spray lye or desalted water to at least one of the scraping component, the magnetic filter component, and the contact position between the scraping component and the magnetic filter component, so as to enhance the adsorption The removal of the magnetic solid matter on the magnetic filter member; the lye collecting unit can collect the lye or demineralized water sprayed by the spray member, and the upper part of the lye collecting unit is provided with a first overflow part, and the lye is collected The lower part of the unit is provided with a first sewage part; the lye settlement purification unit communicates with the first overflow part to accept the lye overflowing from the first overflow part of the lye collection unit, and the lye settles The purification unit includes two or more stages of settling chambers arranged according to the flow direction of the lye; the lye storage unit communicates with the last stage of the settling chamber of the lye settling purification unit through pipelines.

Another aspect of the present invention provides a method for recovering lye in the cleaning section of a continuous annealing and/or galvanizing line. The method uses the lye recovery device in the cleaning section of the continuous annealing and/or galvanizing unit as described above to remove the magnetic solid matter in the lye in the cleaning section, and purify and recycle the lye in the cleaning section of the continuous annealing and/or galvanizing unit The lye or demineralized water sprayed out by the spray member in the recovery device.

Compared with the prior art, the beneficial effects of the present invention include: through the cooperation of the lye collecting unit and the lye sedimentation purification unit, it can be applied to precipitate the lye in the circulation system of the continuous annealing and cleaning section of the galvanizing unit, and Effectively separate the iron-containing sludge in the lye, thereby improving the cleanliness of the lye, ensuring the cleaning, scrubbing and electrolyte volume of the strip, and relieving the maintenance frequency of the rollers of the continuous annealing unit; through the lye collection unit and lye settlement purification Units and circulation pipes are used to recover and recycle the lye in the circulation system of the continuous annealing and galvanizing unit cleaning section, thereby reducing the abnormal consumption of lye; The pipes are connected by hand valve control, and the flushing of desalinated water is changed to lye flushing, which not only improves the flushing effect but also reduces the consumption of desalinated water; through the hand valve control between the circulation pipes, it is also possible to arrange multiple groups of aggregates in parallel (For example, 1, 2, 3 # circulation system) Unicom, recycling, is conducive to the adjustment of the cleaning section of the circulation system, and improves the operability of the circulation system; better guarantee the commissioning and operation of the PALL ceramic membrane degreasing system The quality of use can better meet the production requirements of the cleaning process of the continuous annealing unit.

Description of drawings

Fig. 1 shows a schematic structural view of an alkali liquor recycling device in a cleaning section according to an exemplary embodiment of the present invention.

Fig. 2 shows a schematic structural view of an assembly in the alkali liquor recycling device in the cleaning section of Fig. 1 .

FIG. 3 shows a schematic structural view of the magnetic filter unit in the assembly of FIG. 2 .

Fig. 4 shows the structure and connection schematic diagram of the lye collecting unit, the lye sedimentation purification unit and the lye storage unit in the assembly of Fig. 2 .

Fig. 5 shows a schematic structural view of the lye collecting unit in Fig. 4 .

Fig. 6 shows a schematic front view of the alkaline solution sedimentation purification unit in Fig. 4 .

Fig. 7 shows a schematic perspective view of the alkaline solution sedimentation purification unit in Fig. 4 .

The reference signs are explained as follows:

1# magnetic drum filter-H01, 2# magnetic drum filter-H02, 3# magnetic drum filter-H03, 1# lye recovery system-F01, 2# lye recovery system-F02, 3# alkali Liquid recycling system-F03, 1# circulation tank-X01, 2# circulation tank-X02, 3# circulation tank-X03, 1#, 2# circulation tank connection pipe hand valve-V01, 2#, 3# circulation tank connection Pipe hand valve-V02, 1#, 2# circulating tank connecting pipe-GO1, 2#, 3# circulating tank connecting pipe-G02, 1# lye recovery system sewage pipe-W01, 2# lye recovery system sewage pipe- W02, 3# lye recovery system sewage pipe-W03, 1# magnetic drum filter lye flow direction-R01, 1# magnetic drum filter overflow lye direction-R02, 1# magnetic drum filter lye and demineralized water Inter-hand valve-V03, connecting pipe between 1# magnetic drum filter lye and desalted water-G03, 1# magnetic drum filter lye input pipe-G04, 1# magnetic drum filter desalted water input pipe-G05, 1 #Alkali recovery system collection trolley-C01, 1# lye recovery system lye flow direction-R03, 1# lye recovery system discharge connection hose with pipe collar 01-J01, 1# lye recovery system sewage pipe W01, 1# lye recovery system overflow hose with hose clamp 02-J02, 1# lye recovery system with hose clamp overflow hose 03-J03, 1# lye recovery system collection tank-T01, 1# lye recovery system Connecting pipe between 1# circulating tank-G06, 1# lye recovery system and 1# circulating tank connecting control hand valve-V04, collecting trolley liquid level gauge-1, collecting trolley wheel-2, collecting trolley overflow pipe- 3. Collection trolley overflow hand valve-4, overflow waste discharge hand valve-5, overflow waste discharge connection pipe-6, collection trolley waste discharge hand valve-7, waste discharge connection pipe-8, overflow lye discharge Waste direction-R04, waste lye discharge direction-R05, collection tank connection pipe-9, collection tank overflow pipe-10, collection tank overflow hand valve-11, collection tank support-S01, collection tank lye overflow Direction-R06, collection tank third overflow tank discharge hand valve-12, collection tank second overflow tank discharge hand valve-13, collection tank first overflow tank discharge hand valve-14, collection tank third First-stage overflow tank waste liquid discharge hand valve-15, collection tank second-stage overflow tank waste liquid discharge hand valve-16, collection tank first-stage overflow tank waste liquid discharge hand valve-17, collection tank with pipe collar waste Liquid connection rubber hose-18, collection tank sewage pipe-19, collection tank first, second and third overflow tank discharge connection pipes-20, collection tank first, second and third overflow tank waste discharge connection pipes-21 , The first, second and third stage overflow tank discharge and waste liquid discharge connection pipe -22 of the collection tank.

Detailed ways

Hereinafter, the method and device for recovering alkali liquor in the cleaning section of the continuous annealing and/or galvanizing line of the present invention will be described in detail in conjunction with exemplary embodiments.

In an exemplary embodiment of the present invention, the lye recovery device in the cleaning section of the continuous annealing and/or galvanizing line may include a magnetic filter unit, an lye collection unit, an lye settlement purification unit, and an lye storage unit. Preferably, the lye recovery device in the cleaning section of the continuous annealing and/or galvanizing unit can also be composed of two or more sets of aggregates arranged side by side, so as to increase the processing capacity of the lye in the cleaning section. The assembly mentioned here can be made of magnetic filtration unit, lye collection unit, lye sedimentation purification unit and lye storage unit, and in any two adjacent assemblies, the lye storage unit in one assembly The pipeline that is communicated with the lye settlement purification unit can communicate with each other through the connecting pipe that is provided with the control valve and the pipeline that connects the lye storage unit and the lye settlement purification unit in another assembly; thus it is beneficial to form continuous retreat and /or the different aggregates of the lye recovery device in the cleaning section of the galvanizing unit are connected and circulated, which is conducive to better overall adjustment of the cleaning section circulation system, and increases the operability of the entire system, thereby better ensuring PALL ceramics The commissioning and service quality of the membrane degreasing system.

Specifically, the magnetic filter unit may include a magnetic filter member, a shower member, and a scraper member. Among them, the magnetic filter member adsorbs the magnetic solid matter in the alkaline solution flowing through the cleaning section of the magnetic filter unit; the scraping member can scrape off the magnetic solid matter adsorbed on the magnetic filter member; the spray member can send water to the scraping member, At least one of the magnetic filter member and the contact position of the scraper member and the magnetic filter member is sprayed with lye or demineralized water to enhance the removal of magnetic solid matter adsorbed on the magnetic filter member. For example, a magnetic filter unit can consist of one or more than two drum filters. As shown in Figure 1 and Figure 2, the magnetic filter unit includes two groups arranged side by side, and each group consists of two magnetic drum filters connected in series.

The lye collecting unit can collect lye or demineralized water sprayed by the spraying member, and can perform preliminary settlement and purification of the lye collected therein. The upper part of the lye collecting unit can be provided with a first overflow part, through which the preliminarily purified lye can be discharged out of the lye collecting unit. The bottom of the lye collection unit can be provided with a first blowdown component, through which the magnetic solid matter (for example, iron-containing silt) that settles to the bottom of the lye collection unit can be discharged from the lye collection unit regularly or irregularly. In addition, rolling parts are arranged at the bottom of the lye collecting unit, and the lye collecting unit can realize its own movement through the rolling of the rolling parts. As shown in Figure 2, the lye collecting unit can be a wheeled trolley with the function of collecting lye.

The lye settlement purification unit is communicated with the first overflow part of the lye collection unit, so as to be able to accept the lye overflowing from the first overflow part of the lye collection unit. The lye settlement purification unit may include two or more stages of settling chambers arranged in accordance with the flow direction of lye. In addition, the height of each settling chamber in the settling chambers of two or more stages preferably decreases sequentially according to the flow direction of the alkali liquor. Preferably, the bottom of each stage of the settling chamber of the alkaline solution settling purification unit can be provided with a sewage discharge member. As shown in FIG. 2 , the alkaline solution settlement and purification unit may include three stages of settling chambers arranged in accordance with the flow direction of the alkaline solution.

The lye storage unit communicates with the final settling chamber of the lye settlement purification unit through pipelines.

Fig. 1 shows a schematic structural view of an alkali liquor recycling device in a cleaning section according to an exemplary embodiment of the present invention. The lye recycling device in the cleaning section of the present invention may also be called a lye recycling system in the cleaning section. Fig. 2 shows a schematic structural view of an assembly (for example, it may be referred to as 1# alkali liquor recycling assembly) in the alkali liquor recycling device in the cleaning section of Fig. 1 . FIG. 3 shows a schematic structural view of the magnetic filter units (for example, two groups each consisting of two magnetic drum filters connected in series) in the aggregate of FIG. 2 . Fig. 4 has shown the lye collecting unit (for example, can be referred to as collecting trolley), the lye sedimentation purification unit (for example, can be called collection tank) and lye storage unit (for example, can be called collection tank) in the assembly of Fig. 2 is the structure and connection diagram of the circulation tank). Hereinafter, the lye collection unit (for example, may be referred to as a collection trolley), the lye settlement purification unit (for example, may be referred to as a collection tank) and the lye storage unit (for example, may be referred to as a circulation tank) may be collectively referred to as It is an assembly for recycling lye. Fig. 5 shows a schematic structural view of the lye collecting unit (for example, it may be called a collecting trolley) in Fig. 4 . Fig. 6 shows a schematic front view of the alkaline solution sedimentation purification unit (for example, it may be called a collection tank) in Fig. 4 . Fig. 7 shows a schematic perspective view of the alkaline solution settlement purification unit (eg, it may be called a collection tank) in Fig. 4 .

As shown in Fig. 1 to Fig. 7, in another exemplary embodiment of the present invention, the lye recycling device or system in the cleaning section includes 1# magnetic drum filter H01, 2# magnetic drum filter H02, 3# Magnetic drum filter H03, 1# lye recycling assembly F01, 2# lye recycling assembly F02, 3# lye recycling assembly F03, 1# circulation tank X01, 2# circulation tank X02, 3# Circulation tank X03, 1#, 2# circulation tank connection pipe hand valve V01, 2#, 3# circulation tank connection pipe hand valve V02, 1#, 2# circulation tank connection pipe GO1, 2#, 3# circulation tank connection pipe G02, 1# lye recovery system sewage pipe W01, 2# lye recovery system sewage pipe W02, 3# lye recovery system sewage pipe W03.

As shown in Figure 1, for the lye recycling system in the cleaning section of the continuous annealing and galvanizing unit, according to the setting of the cleaning section, 3 sets of magnetic drum filter systems are set up, and each set of magnetic drum filter systems is equipped with lye Recycling aggregates. These three sets of magnetic drum filtration systems, through the reasonable opening and closing of hand valves V01, 2#, and 3# circulation tanks connecting pipes of 1# and 2# circulation tanks, the lye recovery and utilization system can be effectively improved. Unicom, recycling.

As shown in Figure 3, the magnetic drum filter system of the lye recycling assembly in the 1# cleaning section includes: 1# magnetic drum filter lye flow direction R01, 1# magnetic drum filter overflow lye direction R02, 1# Hand valve V03 between drum filter lye and desalinated water, connecting pipe G03 between 1# drum filter lye and desalinated water, 1# drum filter lye input pipe G04, 1# drum filter desalted water Input pipe G05. The lye input pipe G04 of the magnetic drum filter system of the 1# cleaning section lye recycling assembly and the desalted water input pipe G05 of the 1# magnetic drum filter are connected through the connecting pipe G03 and the hand valve V03 .

As shown in Figure 3, during actual production and operation, close the hand valve on the desalted water input pipe G05 of the 1# magnetic drum filter, and open the hand valve V03 to realize the washing of the lye between the magnetic drum and the scraper; Open the hand valve on the desalted water input pipe G05 of the 1# magnetic drum filter, and close the hand valve V03 to realize the cleaning between the magnetic drum and the scraper by the lye. The lye overflows along the magnetic drum of the magnetic drum filter and stays in the collecting trolley along the direction of R02.

As shown in Figure 4, the 1# lye recovery assembly in the cleaning section includes: 1# lye recovery system collecting trolley C01, 1# lye recovery system lye flow direction R03, 1# lye recovery system with pipe collar Drain connection hose 01J01, 1# lye recovery system sewage pipe W01, 1# lye recovery system overflow hose with hoop 02J02, 1# lye recovery system overflow hose with hoop 03J03, 1# lye recovery system Collection tank T01, connecting pipe G06 between 1# lye recovery system and 1# circulation tank, connection control hand valve V04 between 1# lye recovery system and 1# circulation tank. 1# lye recovery system collection trolley C01 and 1# Between the collection tank T01 of the lye recovery system, it is connected through the connecting rubber hose 02 (J02) with a hose clamp; between the collection tank T01 of the 1# lye recovery system and the 1# circulation tank, through the connecting rubber hose 03 (J03) with a hose clamp ) connection; 1# lye recovery system collection trolley C01 and 1# lye recovery system sewage pipe are connected through rubber hose 01 (J01) with hose clamp.

In Figure 5, A—indicates the A section of the lye overflow pipe of the collection trolley, B—indicates the B section of the lye overflow pipe of the collection trolley, H1-indicates the distance between the level gauges of the collection trolley, and H2-indicates the collection trolley The height difference between the A section of the lye overflow pipe and the B section of the lye overflow pipe of the collection trolley, H3- indicates the height difference between the lye overflow pipe of the collection trolley and the lye discharge connecting pipe of the collection trolley, H4- Indicates the height from the bottom of the overflow pipe of the collection trolley to the bottom of the collection trolley, and H5- indicates the height of the collection trolley from the ground.

As shown in Figure 5, the collection trolley C01 of the lye recycling assembly in the cleaning section includes: the liquid level gauge 1 of the collection trolley, the wheels of the collection trolley 2, the overflow pipe of the collection trolley 3, the overflow hand valve 4 of the collection trolley, and the overflow drain Waste hand valve 5, overflow waste discharge connecting pipe 6, collection trolley waste discharge hand valve 7, waste discharge connection pipe 8, overflow lye discharge direction R04, waste lye discharge direction R05. The collecting trolley C01 is equipped with a liquid level gauge 1, which is used to observe the liquid level of the lye in the collecting trolley, and its liquid level scale is H1. The collection trolley C01 is equipped with wheels 2, which is convenient for the trolley to move out and in during cleaning, and has a certain height difference with the collection tank, that is, H5≥H11. The A section of the overflow pipe 3 of the collecting trolley C01 is lower than the lye of the collecting trolley, and the height from the bottom of the collecting trolley is H4, which can make the lye fully realize the overflowing effect in the collecting trolley C01. The section B of the overflow pipe 3 of the collecting trolley C01 is higher than the section A of the overflow pipe 3 of the collecting trolley, and the height difference is H2.

As shown in Figures 4 and 5, during actual production and operation, when the lye in the collection trolley C01 is higher than the section B of the overflow pipe 3, the lye in the collection trolley C01 overflows into the collection tank T01 through the connecting hose J02 When the lye in the collection trolley C01 is lower than the B section of the overflow pipe 3, the lye in the collection trolley C01 stops overflowing to the collection tank T01 through the connecting rubber hose J02.

As shown in FIG. 5 , the hand valve 4 on the overflow pipe 3 of the collection trolley C01 is used to control the flow rate of the lye overflowing into the collection tank T01 . When the lye in the collection trolley C01 does not need to overflow into the collection tank T01, the hand valve 4 on the overflow pipe 3 is closed, and the overflow waste discharge hand valve 5 on the overflow waste discharge connecting pipe 6 will open/close the control drain. The size of the waste flow, the lye is discharged along R04; when the collection trolley C01 is cleaned, the hand valve 4 of the overflow pipe 3 and the overflow waste discharge hand valve 5 on the overflow waste discharge connecting pipe 6 are closed, and the waste discharge The hand valve 7 on the connecting pipe 8 is opened to clean and discharge the dolly.

In Figures 6 and 7, C—represents the C section of the lye overflow pipe of the collection tank, D—represents the D section of the lye overflow pipe of the collection tank, H6-the height of the connection pipe of the collection tank from the bottom of the collection tank, H7-the first section of the collection tank The height of the first-level overflow tank, H8-the height of the second-level overflow tank of the collection tank, H9-the height of the overflow pipe of the collection tank from the bottom of the collection tank, H10-represents the C section of the lye overflow pipe of the collection tank to the lye of the collection tank The height difference between the D sections of the overflow pipe, h01-the height of the collection tank, h02-the width of the collection tank, h03-the length of the collection tank, H12-the height difference between the collection tank discharge pipe and the waste liquid discharge pipe.

As shown in Figures 6 and 7, the collection tank T01 of the 1# lye recycling assembly includes: the collection tank connecting pipe 9, the collection tank overflow pipe 10, the collection tank overflow hand valve 11, the collection tank support S01, the collection tank alkali Liquid overflow direction R06, collection tank third-stage overflow tank discharge hand valve 12, collection tank second-stage overflow tank discharge hand valve 13, collection tank first-stage overflow tank discharge hand valve 14, collection tank third-stage Overflow tank waste liquid discharge hand valve 15, collection tank second-stage overflow tank waste liquid discharge hand valve 16, collection tank first-stage overflow tank waste liquid discharge hand valve 17, collection tank waste liquid connection hose with pipe collar 18 , Collection tank sewage pipe 19, collection tank first, second and third overflow tank discharge connection pipe 20, collection tank first, second and third overflow tank waste liquid discharge connection pipe 21, collection tank first, second, Tertiary overflow tank discharge and waste liquid discharge connecting pipe 22.

As shown in Figures 4 and 6, during actual production and operation, the lye overflows step by step along the collection tank T01, passes through the lye in the direction of R06, passes through the overflow pipe 10, and enters the circulation tank X01 through the connecting hose J03, so that The lye is recovered and recycled.

As shown in Figure 6, the connecting pipe 9 of the collection tank T01 is used to receive the lye overflowing from the collection trolley C01, and its height is H6≤H3. The collection tank T01 is set as a multi-stage overflow tank, and the isolation plates of H7 and H8 are set in the tank, and H8<H7<H6. The collection tank T01 is equipped with a support S01, which is convenient for hoisting out and in during collection and cleaning, and has a certain height difference with the collection trolley, that is, H11≤H5. The C section of the overflow pipe 10 of the collection tank T01 is lower than the lye of the last stage of the collection tank, and the height from the bottom of the collection trolley is H9 (H9<H8), which can fully realize the overflow function of the lye in the collection tank T01 . Section D of the overflow pipe 10 of the collection tank T01 is higher than section C of the overflow pipe 10 of the collection tank, and the height difference is H10.

As shown in Figures 4 and 6, during actual production and operation, when the lye in the collection tank T01 is higher than the section D of the overflow pipe 10, the lye in the collection tank T01 overflows into the circulation tank X01 through the connecting hose J03 flow; when the lye in the collection tank T01 is lower than the section D of the overflow pipe 10, when the lye in the collection tank T01 stops overflowing to the circulation tank X01 through the connecting hose J03.

As shown in FIG. 6 , the hand valve 11 on the overflow pipe 10 of the collection tank T01 is used to control the flow rate of the lye overflowing into the circulation tank X01 .

As shown in FIG. 7 , at the position higher than the bottom H12 of the collection tank T01 , each overflow tank is provided with an overflow pipe 20 , H12<H9. At the position higher than the bottom H12 of the collection tank T01, overflow hand valves 12, 13, and 14 are installed at the overflow pipe 20 of each stage of the overflow tank to control the overflow flow of each stage of the collection tank respectively. The overflow hand valves 12, 13, and 14 of the collection tank T01 are respectively used for cleaning the collection tank. After the hand valves 12, 13, and 14 are opened, the lye in the overflow tank body is overflowed, and then the sludge is removed. At the bottom of the collection tank T01, each overflow tank is provided with a waste liquid discharge connecting pipe 21. At the bottom of the collection tank T01, discharge hand valves 15, 16, and 17 are respectively set on the waste liquid discharge connecting pipes 21 of each overflow tank to control the waste discharge flow rate of each overflow tank of the collection tank. The discharge hand valves 15, 16, and 17 from the bottom of the collection tank T01 are used to clean the various levels of the collection tank respectively. After the hand valves 15, 16, and 17 are opened, the collection tank is cleaned and discharged. The collection tank T01 and the collection tank drain pipe can be connected by a rubber hose 18 with a hose collar.

The connection pipes G01 and G02 between the circulation tanks of the lye recovery system in Figure 1 are welded and connected by AISI304 stainless steel pipes. The connecting pipes G01 and G02 between the circulation tanks of the lye recycling system are connected with the connecting hand valves V01 and V02 by flanges, and the connecting flanges are welded to the connecting pipes by butt welding. The material of hand valves V01 and V02 connected between circulation tanks of the lye recovery system is AISI304.

The connecting pipe G03 between the lye recovery and utilization aggregate magnetic drum filter lye and the desalinated water in Fig. 3 is welded and connected by AISI304 stainless steel pipe. The connecting pipe G03 between alkali liquor and desalinated water in the drum filter of alkali recovery and utilization assembly is connected with the connecting hand valve V03 by flange connection, and the connecting flange is welded to the connecting pipe by butt welding. Alkali recovery and utilization aggregate Magnetic drum filter The hand valve V03 connecting the alkali and desalinated water is made of AISI304.

The connection pipe G06 of the 1# lye recovery assembly 1# circulation tank X01 in Figure 4 is welded and connected by AISI304 stainless steel pipes. The connection pipe G06 of the 1# lye recycling assembly 1# circulation tank X01 is connected with the connection hand valve V04 by flange connection, and the connection flange is welded to the connection pipe by butt welding. The material of the connecting hand valve V04 of the 1# lye recovery assembly 1# circulation tank X01 is AISI304.

In Fig. 5, the overflow pipe 3, the overflow waste discharge connecting pipe 6, and the waste discharge connecting pipe 8 of the collecting trolley C01 are welded and connected by AISI304 stainless steel pipes. The overflow pipe 3 of the collection trolley C01 is connected to the connecting hand valve 4, the overflow waste discharge connecting pipe 6 is connected to the hand valve 5, and the waste discharge connecting pipe 8 is connected to the connecting hand valve 7 by flange connection, and the connecting flange is welded by butt welding to the connecting pipe. The overflow pipe connection hand valve 4 of the collection trolley C01, the overflow and waste connection hand valve 5, and the waste discharge connection hand valve 7 are all made of AISI304. The overflow pipe 10 of the collection tank T01 and the hand valve 11, the overflow discharge connecting pipe 20 and the hand valves 12, 13, 14, and the waste liquid discharge connecting pipe 21 and the hand valves 15, 16, 17 are all connected by flanges. The flange is welded to the connecting pipe by butt welding. The overflow pipe connection hand valve 11 of the collection tank T01, the overflow discharge connection hand valves 12, 13, 14, and the waste liquid discharge connection hand valves 15, 16, 17 are all made of AISI304.

The connecting pipe 9, overflow pipe 10, overflow discharge connecting pipe 20, discharge connecting pipe 21, and waste liquid connecting pipe 22 of the collection tank T01 in Fig. 6 and 7 are welded and connected by AISI304 stainless steel pipes.

There are sealing gaskets between the hand valves V01, V02 and the connecting flanges between the pipelines in Figure 1, and the material is rubber. There is a gasket between the connecting flange between the hand valve V03 and the pipeline in Figure 3, and the material is rubber. There is a gasket between the connecting flange between the hand valve V04 and the pipeline in Figure 1, and the material is rubber. There is a gasket between the hand valve 4, 5, 7 and the connecting flange between the pipelines in Fig. 5, and the material is rubber. Between the hand valves 11, 12, 13, 14, 115, 16, 17 in Figs. 6 and 7 and the connecting flange between the pipelines, there is a gasket made of rubber.

In yet another exemplary embodiment of the present invention, the lye recovery method for the cleaning section of the continuous annealing and/or galvanizing unit uses the lye recovery device for the cleaning section of the continuous annealing and/or galvanizing unit as described above to remove the cleaning section Magnetic solid substances in the lye, and purify and recover the lye or demineralized water sprayed out by the spray member in the lye recovery device in the cleaning section of the continuous annealing and/or galvanizing unit.

For example, in another exemplary embodiment of the present invention, the lye of the lye recovery device in the cleaning section of the continuous retreat and/or galvanizing unit is removed from the circulation tank (1, 2, 3# circulation tank) by a centrifugal circulation pump After lifting, enter the magnetic drum filter along the drum filter input pipe G04; part of the lye flows along the connecting pipe G03 between the lye and demineralized water of the magnetic drum filter, and enters the nozzle to rinse the surface of the magnetic drum and the scraper area (demineralized water) through the hand valve V03 switch hand valve closed); the lye overflowing from between the magnetic drum and the scraper flows into the collection trolley C01; when the lye content in the collection trolley C01 exceeds the height of its overflow pipe 4, the hand valve 3 is opened, and the lye passes through the rubber hose J02 and connecting pipe 9 enter the primary overflow tank of collection tank T01; when the content of lye in collecting tank T01 exceeds the height of the overflow pipe 10 of the last stage overflow tank, lye passes through hose J03 and connecting pipe G06 , Hand valve 11 (open) enters the 1# circulation tank. 2. The working principle of the 3# lye recycling assembly is similar to the above. The 3 lye recycling assemblies can be switched according to production needs through the connecting hand valves V01 and V02 between the connecting pipes G01 and G02, that is, when the hand valve V04 is closed, V01 is open, and the hand valve in front of the 2# circulation tank Open, the lye in the 1# circulation tank can be replenished to the 2# circulation tank, similarly open the hand valve V04, open the V01, close the hand valve in front of the 2# circulation tank, and the lye in the 2# circulation tank can be replenished to the 1# circulation tank; the front hand valve of 3# circulation tank is closed, V01 and V02 are opened, and the front hand valves of V04 and 2# circulation tank are opened, so that the lye in 3# circulation tank can be replenished to 1 and 2# circulation tanks, the same as 1 and 2 The lye in the #circulation tank can be added to the 3# circulation tank. When the collection trolley C01 needs to be cleaned, close the hand valve 4, open the hand valve 5 to overflow first, then move out the magnetic drum filter through the wheel 2, and clean the sludge. After the sludge is cleaned, open the hand valve 7 for cleaning; the same reason When the collection tank T01 needs to be cleaned, close the hand valves 4 and 11, open the hand valves 12, 13 and 14 to overflow the overflow tanks at all levels of the collection tank one by one, and then clean the sludge. After the sludge is cleaned, open the hand valve 15, 16, 17 for cleaning. After the above operations, the recovery and recycling of the lye in the cleaning section is completed, so that the lye can be effectively precipitated and the iron-containing sludge in the lye can be effectively separated, the cleanliness of the lye can be improved, and the strip steel can be cleaned, brushed and electrolyzed quality, which eases the maintenance frequency of the rollers of the continuous annealing unit; further reduces the abnormal consumption of lye, and changes the flushing of desalinated water to lye flushing, which not only improves the flushing effect but also reduces the consumption of desalinated water.

In summary, the lye recovery method and device in the cleaning section of the continuous annealing and/or galvanizing unit of the present invention can realize: the lye input pipe is connected with the magnetic filter unit, and after the lye is lifted by the centrifugal circulation pump, the lye is input through the lye The pipe enters the magnetic filter unit, the magnetic filter unit is soaked in the lye to absorb the iron-containing sludge in the lye, the sludge is scraped off by a scraper, and then the desalinated water valve is closed, and the hand valve between the lye input and the desalinated water connection pipe is opened. Use lye to wash the iron-containing sludge on the surface of the magnetic drum and the scraper; these iron-containing silt and overflow lye enter the lye collection unit, and the iron-containing silt in the lye starts due to its own weight and its high density. Precipitate in the lye collection unit. When the lye in the lye collection unit reaches a certain height, it overflows from the overflow pipe and enters the lye settlement purification unit through the connecting hose; the lye in the lye settlement purification unit After collecting to a certain height, it overflows step by step, and returns to the lye storage unit of the circulation system through the overflow pipe of the lye settlement purification unit and the connecting hose; the lye is in the lye settlement purification unit, and the iron-containing sludge in the lye Due to its own weight and its high density, it begins to settle in the lye settlement purification unit.

The advantages of the lye recovery method and device in the cleaning section of the continuous annealing and/or galvanizing unit of the present invention include: through the lye collection unit, the lye settlement purification unit, and the lye storage unit, the lye is effectively collected and precipitated, Effectively separate the iron-containing sludge in the lye; change the desalinated water washed by the magnetic filter member (for example, a magnetic drum) and the scraper member (for example, a scraper) of the magnetic filter unit to lye washing, which not only reduces the desalinated water The consumption of lye also improves the filtering effect of lye; the lye collection unit is optimized, adding a liquid level gauge that can effectively observe the liquid level of lye collected by the lye collection unit, and adding a lye after the lye collection unit The multi-stage lye settlement purification unit avoids the free consumption of lye and the increase of energy costs caused by directly discharging lye into the waste liquid pipeline; a multi-stage overflow lye settlement purification unit is designed to collect the lye from the lye collection unit The overflowed lye undergoes multi-stage overflow and precipitation, which better ensures the effective separation of iron-containing sludge in the lye; the lye in the lye settlement purification unit is separated and returned to the lye storage unit, and then the The circulation pump is lifted to the magnetic filter unit, which constitutes the recovery and recycling of lye, reduces the abnormal discharge of lye, and reduces energy consumption; multiple groups of aggregates are arranged side by side and connected to each other for recycling, which is more efficient It ensures the effective use of lye and the cleaning, scrubbing and electrolyte volume of the strip, which is conducive to the adjustment of the circulation system in the cleaning section and enhances the operability of the circulation system; the lye collection unit adopts multiple overflow pipes, It can quickly overflow to avoid the lye from overflowing from the top of the lye collection unit, resulting in abnormal consumption of lye; the overflow pipe of the lye collection unit is connected to the bottom discharge pipe, controlled by a hand valve, when cleaning the lye collection unit It can be directly discharged through the overflow valve first, and then the iron-containing sludge in the car is cleaned. After cleaning, the waste discharge hand valve is opened to discharge; the bottom of the lye collection unit is equipped with wheels to facilitate the cleaning of the lye collection unit. Move out and move in, and have a certain height difference with the lye settlement and purification unit; the lye settlement and purification unit is set to adopt a multi-stage overflow tank structure, which can better separate and precipitate the iron-containing sludge in the lye; The lye sedimentation purification unit adopts multi-way connecting pipes to receive the lye overflowing from the lye collection unit; The overflow above the lye settlement purification unit causes abnormal consumption of lye; each level of tank in the lye settlement purification unit is equipped with an overflow valve and a discharge valve. When cleaning the lye settlement purification unit, the overflow valve can be opened first. Then remove the iron-containing sludge in the lye sedimentation purification unit, and then open the discharge hand valve to discharge after cleaning; The connection pipe between the sedimentation purification unit and the lye storage unit, the lye collection unit, the lye sedimentation purification unit and the sewage pipeline are all connected by rubber hoses with hose clamps, which is convenient for the disassembly and separation of the lye collection unit and the lye sedimentation purification unit. cleaning. That is to say, the method and device of the present invention can effectively reduce the abnormal consumption of lye, reduce the consumption of demineralized water, reduce energy costs, and reduce It can also effectively precipitate the lye and separate the iron-containing sludge in the lye, thereby improving the cleanliness of the lye, ensuring the cleaning, brushing and electrolyte volume of the strip, and alleviating the pressure on the rollers of the continuous annealing unit. maintenance frequency; it can also allow multiple groups of aggregates to be connected and recycled in parallel, which is conducive to the adjustment of the circulation system in the cleaning section and enhances the operability of the circulation system; it better ensures the PALL ceramic membrane degreasing system. Putting and using quality.

Although the invention has been described above with reference to the exemplary embodiments and accompanying drawings, it will be apparent to those skilled in the art that various modifications may be made to the above-described embodiments without departing from the spirit and scope of the claims.

Claims (5)

1. a kind of continuous annealing and/or washing section of galvanized set alkali liquor recovery device, which is characterized in that the cleaning section recycle of alkali liquor dress It sets including Magnetic filtration device unit, lye collector unit, lye subsiding and purifying unit, alkali storage unit, wherein

The Magnetic filtration device unit has Magnetic filtration device component, spraying component and scraper component, and Magnetic filtration device component is to flowing through magnetic Magnetic retention substance in the cleaning section lye of property filter element is adsorbed, and scraper component can will be adsorbed on Magnetic filtration device structure Magnetic retention substance on part strikes off, and spraying component can be to scraper component, Magnetic filtration device component and scraper component and magnetic mistake It filters and sprays lye or demineralized water at least one at the contact position of component, with enhancing to being adsorbed on Magnetic filtration device component The removal of magnetic retention substance；

The lye collector unit can collect the lye or demineralized water that spraying component sprays out, and the top of lye collector unit is set The first overflow means are equipped with, the lower part of lye collector unit is provided with the first sewage component；

The lye subsiding and purifying unit with first overflow means by being connected to, to receive from the first of lye collector unit The lye overflowed in overflow means, lye subsiding and purifying unit include two-stage or three-level according to the setting of lye flow direction or more Expansion chamber, the height of each expansion chamber is successively dropped according to lye flow direction in the expansion chamber more than two-stage or three-level It is low；

The alkali storage unit is connected to by pipeline with the afterbody expansion chamber of lye subsiding and purifying unit.

2. continuous annealing according to claim 1 and/or washing section of galvanized set alkali liquor recovery device, which is characterized in that described Cleaning section alkali liquor recovery device includes the aggregate of two groups be set side by side or three groups or more, and the aggregate is by Magnetic filtration device list Member, lye collector unit, lye subsiding and purifying unit and alkali storage unit are constituted, and in any two adjacent aggregates In, by pipeline that alkali storage unit is connected to lye subsiding and purifying unit by being provided with the company of control valve in an aggregate Adapter tube communicates with each other the pipeline that alkali storage unit is connected to lye subsiding and purifying unit with another aggregate.

3. continuous annealing according to claim 1 or 2 and/or washing section of galvanized set alkali liquor recovery device, which is characterized in that institute The bottom for stating every grade of expansion chamber of lye subsiding and purifying unit is provided with blowdown component.

4. continuous annealing according to claim 1 or 2 and/or washing section of galvanized set alkali liquor recovery device, which is characterized in that institute It states lye collector unit bottom and is provided with rolling member, lye collector unit can pass through the scrolling realization itself of rolling member It is mobile.

5. a kind of continuous annealing and/or washing section of galvanized set recycle of alkali liquor method, which is characterized in that the method is used as right is wanted Continuous annealing described in asking 1 or 2 and/or washing section of galvanized set alkali liquor recovery device remove the magnetic retention object in cleaning section lye Matter, and purify and recycle the lye that the spraying component in continuous annealing and/or washing section of galvanized set alkali liquor recovery device sprays out Or demineralized water.