CN113174598A - Water recycling method for tunnel type steel pipe acid pickling phosphating production line - Google Patents
Water recycling method for tunnel type steel pipe acid pickling phosphating production line Download PDFInfo
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- CN113174598A CN113174598A CN202110376610.1A CN202110376610A CN113174598A CN 113174598 A CN113174598 A CN 113174598A CN 202110376610 A CN202110376610 A CN 202110376610A CN 113174598 A CN113174598 A CN 113174598A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/04—Apparatus for cleaning or pickling metallic material for cleaning pipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/023—Cleaning the external surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
Abstract
The invention discloses a water recycling method for a tunnel type automatic production line for steel pipe acid cleaning and phosphating, which adopts a counter-current recycling method of water, wherein the water conveyed from a clean water tank into an acid cleaning production line passes through a secondary rinsing tank, an acid cleaning flushing tank, a primary rinsing tank and a pre-cleaning tank in sequence each time, and the water in a high-pressure flushing tank is also extracted from the acid cleaning flushing tank, so that the clean water can be replenished in each of the pre-cleaning tank, the primary rinsing tank, the high-pressure flushing tank and a secondary rinsing tank process tank by the circulation supply of the primary clean water, the liquid level and the PH value of each tank are increased, and the water circulation efficiency is improved. In the process of circularly supplying the clean water, the flow direction of the water is opposite to the running direction of the cleaning process of the steel pipe, and the clean water can be firstly supplied to a secondary rinsing tank with the highest requirement on the pH value, so that the high-efficiency circulation of the water is realized, the cleaning efficiency of the tunnel type automatic production line for pickling and phosphating the steel pipe is improved, and the production cost is reduced.
Description
Technical Field
The invention relates to a water recycling method for a tunnel type steel pipe acid pickling phosphating automatic production line, and belongs to the technical field of water circulation of steel pipe acid pickling production lines.
Background
In order to improve the adverse effect of manual pickling of steel products such as steel pipes, trays and the like on operators and the environment, realize automatic cleaning operation of pickling and improve the cleaning efficiency of pickling, technical personnel provide a fully-closed tunnel type environment-friendly automatic production line for pickling and phosphating the steel pipes. And according to the automatic mode of the production line, an acid cleaning and phosphating production line for cleaning the plate body is also provided. The cleaning tank of the closed tunnel type acid pickling phosphating production line comprises a plurality of process operating tanks used for each process of acid pickling phosphating treatment of the steel pipe; can include the following steps: pre-wash tanks, pickling tanks, transfer tanks, pickling tanks, phosphating tanks, saponification tanks and the like, in which water is an important washing raw material. Before and after the steel pipe is pickled, in order to ensure that no residual acid exists on the surface of the steel pipe after pickling and pickling, the typical process comprises the following steps: precleaning → acid washing → first rinsing → high pressure washing → second rinsing → subsequent processes.
For the above process, water is mainly used in the following aspects: 1) liquid preparation and replenishment in each process tank; 2) pre-cleaning water before pickling; 3) rinsing water after acid washing; 4) rinse water after pickling. Of the above items, 1-2 items have small water consumption ratio in the operation process of the production line, belong to one-time investment, and only need to be supplemented properly when the water is evaporated. The water consumption of the 3-4 items in the operation process of the production line is relatively large, and is vital to the operation cost of the production line.
In addition, for the high-pressure washing process, the washing water pump is adopted to extract clean water from the clean water tank, the steel pipe in the high-pressure washing tank is washed at high pressure, and acid-containing wastewater after high-pressure washing is directly discharged into the wastewater treatment system through the water outlet of the high-pressure washing tank, so that waste of water resources is also caused.
Further, in the actual cleaning process, the pH value of the rinsing tank must be ensured within a certain range, and particularly, the requirement of the second rinsing on the pH value is high, and the pH value in the rinsing tank needs to be ensured to be 6-7. According to the real-time detection of the PH meter, when the PH value of the rinsing tank drops to a certain value, a part of water in the tank is discharged through the water outlet, and then clean tap water is supplied through the water inlet. The pre-cleaning tank has low requirement on the pH value, but as the cleaning times increase, the water in the tank becomes turbid, and a part of water in the cleaning tank needs to be discharged at intervals, and then clean tap water is supplemented through the water inlet.
The method for utilizing water in the cleaning process can completely clean the steel pipes, the wire rods and the like, and ensure the normal operation of the production line. However, the water consumption is very large, and generally, the water consumption is more than or equal to 600 Kg/ton calculated by cleaning each ton of steel pipe or wire rod. The huge consumption not only wastes water resources, but also brings high cost pressure to the production of enterprises.
Disclosure of Invention
In order to make up for the defects of the water utilization method in the cleaning process of the existing steel pipe pickling, the invention provides a water recycling method for a tunnel type steel pipe pickling phosphating production line.
According to the steel pipe cleaning method for the tunnel type automatic production line for pickling and phosphating the pipes, in the cleaning process of pickling and phosphating the steel pipes, each process tank of the cleaning tank can comprise: a pre-cleaning tank, a pickling tank, a transfer tank, a leaching tank, a phosphating tank, a saponification tank and the like; in the above cleaning process, before and after the steel pipe is pickled, in order to ensure that there is no residual acid on the surface of the steel pipe after pickling and pickling, the specific implementation process is as follows: precleaning → acid washing → first rinsing → high pressure washing → second rinsing → subsequent processes.
Thus, the tunnel type automatic production line for pickling and phosphating of pipes, during pickling of steel pipes, more specifically comprises: a pre-cleaning tank, a pickling tank, a primary rinsing tank, a high-pressure washing tank and a secondary rinsing tank. The pre-cleaning tank, the pickling tank, the primary rinsing tank, the high-pressure washing tank and the secondary rinsing tank are sequentially arranged according to the process, each process tank is provided with an overflow port and a water outlet, and each process tank is respectively provided with a PH detection device and a liquid level detection device.
Aiming at the water circulation in the process tank in the cleaning process of steel pipe acid washing and phosphating, the invention provides a water circulation utilization method for a tunnel type steel pipe acid washing and phosphating automatic production line, which adopts a water countercurrent circulation utilization method and is matched with an automatic detection method to realize the high-efficiency utilization of water.
According to the water recycling method for the automatic production line for pickling and phosphating the tunnel steel pipe, a clean water tank is arranged in the production line for pickling and phosphating the steel pipe and is used for supplying clean water in the water circulation process, a pickling and washing tank is arranged beside a pickling tank and a separation tank is arranged beside the pickling and washing tank in the process of high-pressure washing, and the separation tank is adjacent to the pickling and washing tank; and is provided with a stirring device for assisting the PH detection device and the liquid level detection device to carry out PH detection and liquid level detection.
The water recycling method for the tunnel type steel pipe acid pickling phosphating production line has the specific technical scheme that:
the method comprises the following steps that firstly, initial liquid levels of a pre-cleaning tank, a primary rinsing tank and a secondary rinsing tank are kept at certain heights, so that the liquid levels of the steel pipe immersed in the pre-cleaning tank, the primary rinsing tank and the secondary rinsing tank are kept at the positions of overflow ports of the tanks;
step two, detecting the liquid level of the clean water tank by using a liquid level detector, and supplementing clean water to the clean water tank from the outside when the liquid level of the cleaning tank is at a low level so as to keep the liquid level of the clean water tank at a high liquid level;
detecting the pH value of the secondary rinsing tank by adopting a pH detection device, and calculating the water quantity required for recovering the pH value of the secondary rinsing tank to a set high value when the pH value of the secondary rinsing tank is detected to be reduced to a set low value; according to the calculated water amount, a water pump is adopted to pump clean water with a corresponding water amount from a clean water tank and convey the clean water to a secondary rinsing tank, so that the PH value of the secondary rinsing tank is restored to a set high value;
step four, the liquid level of the secondary rinsing tank rises, the liquid level of the secondary rinsing tank is detected, and when the liquid level of the secondary rinsing tank is higher than the initial liquid level, water higher than the initial liquid level is discharged through an overflow port and is conveyed to an acid washing and flushing tank;
step five, the liquid level of the pickling flushing tank rises, a PH value of the pickling flushing tank is detected by adopting a PH detection device, the liquid level of the pickling flushing tank is detected when the PH value of the pickling flushing tank is normal, and when the liquid level of the pickling flushing tank is higher than a high liquid level, water higher than the high liquid level in the pickling flushing tank is extracted by adopting a water pump and is conveyed to a primary rinsing tank;
step six, the liquid level of the primary rinsing tank rises, the PH value of the primary rinsing tank is detected, when the PH value of the primary rinsing tank is normal, the liquid level of the primary rinsing tank is detected, when the liquid level of the primary rinsing tank is higher than the initial liquid level, water higher than the initial liquid level in the primary rinsing tank is discharged through an overflow port and conveyed to the pre-cleaning tank;
and seventhly, the liquid level of the pre-cleaning tank rises, the liquid level of the pre-cleaning tank is detected, and when the liquid level of the pre-cleaning tank is higher than the initial liquid level, the water higher than the initial liquid level in the pre-cleaning tank is discharged through an overflow port and conveyed into a wastewater treatment system.
According to the water recycling method, optionally, when the pH value of the pickling and washing tank is detected in the fifth step, when the pH value of the pickling and washing tank is detected to be at a set low value, the water amount required for recovering the pH value of the pickling and washing tank to a set high value is calculated; and (4) pumping clear water from the clear water tank by using a water pump, conveying the clear water to a secondary rinsing tank, and conveying the clear water to the acid washing and rinsing tank through the next circulation.
According to the water recycling method, optionally, when the liquid level of the pickling and flushing tank is detected by adopting a pH detection device in the fifth step, when the liquid level of the pickling and flushing tank is detected to be lower than the initial liquid level, the amount of water required for restoring the liquid level of the pickling and flushing tank to the initial liquid level is calculated; and (4) pumping clear water from the clear water tank by using a water pump, conveying the clear water to a secondary rinsing tank, and conveying the clear water to the acid washing and rinsing tank through the next circulation.
According to the water recycling method, optionally, when the pH value of the primary rinsing tank is detected by adopting a pH detection device in the sixth step, and the pH value of the primary rinsing tank is detected to be at a set low value, calculating to obtain the water amount required by the pH value of the primary rinsing tank to be recovered to a set high value; and (4) pumping clear water from the clear water tank by using a water pump, conveying the clear water to the secondary rinsing tank, and conveying the clear water to the primary rinsing tank through the next circulation.
According to the water recycling method provided by the invention, optionally, when the steel pipe after pre-cleaning, pickling and primary rinsing is conveyed to the high-pressure flushing tank, the water in the pickling flushing tank can be pumped by the flushing water pump and conveyed to the high-pressure flushing tank to perform high-pressure flushing on the steel pipe.
According to the water recycling method, optionally, the acid-containing wastewater after high-pressure washing can be conveyed to a separation tank adjacent to the acid washing and rinsing tank through a water outlet of the high-pressure washing tank; and the waste water after filtering and settling in the diaphragm can flow back to the pickling and rinsing tank through the water outlet in the diaphragm.
According to the water recycling method, according to the steps, the water recycling adopts a counter-current recycling method of water, the water conveyed from the clean water tank into the pickling production line passes through the secondary rinsing tank, the pickling flushing tank, the primary rinsing tank and the pre-cleaning tank in sequence each time, and the water in the high-pressure flushing tank is extracted from the pickling flushing tank, so that the clean water can be supplemented to each of the pre-cleaning tank, the primary rinsing tank, the high-pressure flushing tank and the secondary rinsing tank through the cyclic supply of the primary clean water, the liquid level and the PH value of each tank are increased, the water recycling efficiency is improved, and the utilization rate of the clean water is maximized; in addition, in the process of circularly supplying the clean water, the flow direction of the water is opposite to the running direction of the cleaning process of the steel pipe, so that the clean water can be firstly supplied to a secondary rinsing tank with the highest requirement on the pH value, and the efficient circulation of the water is realized.
The invention has the beneficial effects that:
according to the technical scheme of the invention, according to the water circulation method, the more process tanks of the rinsing tanks are arranged, and the higher the utilization rate of water is.
In the actual operation of the automatic production line for steel pipe acid washing and phosphating, the pH value of the last rinsing tank (the secondary rinsing tank in the technical scheme of the invention) is set in a reasonable range, so that the residual acid on the surface of the steel pipe is basically cleaned, and the subsequent process is not adversely affected. According to the technical scheme of the invention, in the circulation supply process of the clean water, as the flow direction of the water is opposite to the running direction of the cleaning process of the steel pipe, the clean water can be firstly supplied to the secondary rinsing tank with the highest requirement on the PH value; and the replenishment of the primary clean water can realize the replenishment of the clean water in each of the pre-cleaning tank, the primary rinsing tank, the high-pressure washing tank and the secondary rinsing tank, so that the efficiency of water circulation can be improved, and the cleaning efficiency of the production line can be further improved.
According to the technical scheme of the invention, by adopting the counter-current water circulation method, the consumption of water can be reduced to 200 Kg/ton by taking cleaning of each ton of steel pipes or wire rods as a unit; compared with the original water recycling method, the technical scheme of the invention has obvious water saving effect, and the required water amount is only 1/3 of the water amount required by the original water circulation; not only saves a large amount of valuable water resources, but also greatly reduces the production cost of enterprises, and has obvious economic benefit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram showing the arrangement of process tanks before and after pickling of a steel pipe according to the water recycling method of the present invention.
FIG. 2 is a schematic view of each process tank of the cleaning tank of the automatic production line for steel pipe pickling and phosphating.
Fig. 3 is a detailed flow chart of water circulation according to the water recycling method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The first embodiment is as follows:
according to the steel pipe cleaning method of the tunnel type automatic production line for pickling and phosphating the pipe, in the cleaning process of pickling and phosphating the steel pipe, each process tank of the cleaning tank specifically comprises the following steps: a pre-cleaning tank, a pickling tank, a transfer tank, a leaching tank, a phosphating tank, a saponification tank and the like, as shown in FIG. 2; in the above cleaning process, before and after the steel pipe is pickled, in order to ensure that there is no residual acid on the surface of the steel pipe after pickling and pickling, the specific implementation process is as follows: precleaning → acid washing → first rinsing → high pressure washing → second rinsing → subsequent processes. Thus, the process of pickling the steel pipe more specifically comprises: a pre-cleaning tank, a pickling tank, a primary rinsing tank, a high-pressure washing tank and a secondary rinsing tank. Fig. 1 is a schematic view showing the specific arrangement of the pre-cleaning tank, the pickling tank, the primary rinsing tank, the high-pressure rinsing tank and the secondary rinsing tank, and the water circulation among the tanks, according to the water recycling method of the present embodiment.
As shown in fig. 1, a pre-cleaning tank, a pickling tank, a primary rinsing tank (rinsing tank 1), a high-pressure rinsing tank and a secondary rinsing tank (rinsing tank 2) are arranged in sequence according to the process; and each process tank is provided with an overflow port and a water outlet, and is respectively provided with a PH detection device and a liquid level detection device.
Aiming at the water circulation in the process tank in the cleaning process of steel pipe acid washing and phosphating, the invention provides a water circulation utilization method for a tunnel type steel pipe acid washing and phosphating production line, which adopts a water countercurrent circulation utilization method and is matched with an automatic detection method to realize the high-efficiency utilization of water.
According to the embodiment, referring to fig. 1, a clean water tank is arranged in a production line for steel pipe acid washing and phosphating, and is used for supplying clean water in the water circulation process, an acid washing tank is arranged beside a pickling tank, a separation tank is arranged beside the acid washing tank in the high-pressure washing process, and the separation tank is adjacent to the acid washing tank; and is provided with a stirring device for assisting the PH detection device and the liquid level detection device to carry out PH detection and liquid level detection.
Fig. 3 shows a water recycling method according to the present embodiment, a specific flow of water recycling; referring to fig. 1 and 3, the specific technical solution of the water recycling method of the present embodiment is as follows:
the method comprises the following steps that firstly, initial liquid levels of a pre-cleaning tank, a primary rinsing tank and a secondary rinsing tank are kept at certain heights, so that the liquid levels of the steel pipe immersed in the pre-cleaning tank, the primary rinsing tank and the secondary rinsing tank are kept at the positions of overflow ports of the tanks;
step two, detecting the liquid level of the clean water tank by using a liquid level detector, and supplementing clean water to the clean water tank from the outside when the liquid level of the cleaning tank is at a low level, so as to keep the water level in the clean water tank at a high liquid level;
detecting the pH value of the secondary rinsing tank by using a pH detection device, and calculating the water amount required for recovering the pH value of the secondary rinsing tank to a set high value (for example, the pH value is 6.8) when the pH value of the secondary rinsing tank is detected to be reduced to the set low value (for example, the pH value is 6.2); according to the calculated water amount, a water pump is adopted to pump clean water with a corresponding water amount from a clean water tank and convey the clean water to a secondary rinsing tank, so that the PH value of the secondary rinsing tank is restored to a set high value;
step four, the liquid level of the secondary rinsing tank rises, the liquid level of the secondary rinsing tank is detected, and when the liquid level of the secondary rinsing tank is higher than the initial liquid level, water higher than the initial liquid level is discharged through an overflow port and is conveyed to an acid washing and flushing tank;
step five, the liquid level of the pickling flushing tank rises, a PH value of the pickling flushing tank is detected by adopting a PH detection device, the liquid level of the pickling flushing tank is detected when the PH value of the pickling flushing tank is normal, and when the liquid level of the pickling flushing tank is higher than a high liquid level, water higher than the high liquid level in the pickling flushing tank is extracted by adopting a water pump and is conveyed to a primary rinsing tank;
step six, the liquid level of the primary rinsing tank rises, the PH value of the primary rinsing tank is detected, when the PH value of the primary rinsing tank is normal, the liquid level of the primary rinsing tank is detected, when the liquid level of the primary rinsing tank is higher than the initial liquid level, water higher than the initial liquid level in the primary rinsing tank is discharged through an overflow port and conveyed to the pre-cleaning tank;
and seventhly, the liquid level of the pre-cleaning tank rises, the liquid level of the pre-cleaning tank is detected, and when the liquid level of the pre-cleaning tank is higher than the initial liquid level, the water higher than the initial liquid level in the pre-cleaning tank is discharged through an overflow port and conveyed into a wastewater treatment system.
Referring to fig. 3, according to the water recycling method of this embodiment, when the PH value of the pickling bath is detected in step five, and the PH value of the pickling bath is detected to be at a set low value, the water amount required for the PH value of the pickling bath to return to a set high value is calculated; and (4) pumping clear water from the clear water tank by using a water pump, conveying the clear water to a secondary rinsing tank, and conveying the clear water to the acid washing and rinsing tank through the next circulation.
Referring to fig. 3, according to the water recycling method of this embodiment, when the PH detection device is used to detect the liquid level of the pickling and washing tank in step five, and when the liquid level of the pickling and washing tank is detected to be lower than the initial liquid level, the amount of water required for the liquid level of the pickling and washing tank to return to the initial liquid level is calculated; and (4) pumping clear water from the clear water tank by using a water pump, conveying the clear water to a secondary rinsing tank, and conveying the clear water to the acid washing and rinsing tank through the next circulation.
Referring to fig. 3, according to the water recycling method of this embodiment, when the PH of the primary rinsing tank is detected by using the PH detection device in the sixth step, and the PH of the primary rinsing tank is detected to be at the set low value, the amount of water required for the PH of the primary rinsing tank to return to the set high value is calculated; and (4) pumping clear water from the clear water tank by using a water pump, conveying the clear water to the secondary rinsing tank, and conveying the clear water to the primary rinsing tank through the next circulation.
Referring to fig. 3, according to the water recycling method of the embodiment, when the steel pipe after the pre-cleaning, pickling and primary rinsing is conveyed to the high-pressure washing tank, the water in the pickling washing tank can be pumped by the washing water pump and conveyed to the high-pressure washing tank to perform high-pressure washing on the steel pipe.
Referring to fig. 3, according to the water recycling method of the embodiment, the acid-containing wastewater after high-pressure washing can be conveyed to the diaphragm tank of the acid washing and rinsing tank through the water outlet of the high-pressure washing tank; and the waste water after filtering and settling in the diaphragm can flow back to the main tank of the pickling and rinsing tank through the water outlet in the diaphragm.
Referring to fig. 1 and 2, according to the water recycling method of the present embodiment, the water recycling method adopts a counter-current water recycling method, water conveyed from a clean water tank into an acid washing production line passes through a rinsing tank 2, an acid washing rinsing tank, a rinsing tank 1 and a pre-rinsing tank in sequence each time, and water in a high-pressure rinsing tank is extracted from the acid washing rinsing tank, so that clean water can be replenished into each of the pre-rinsing tank, the primary rinsing tank, the high-pressure rinsing tank and a secondary rinsing tank by one-time clean water circulation supply, the liquid level and the PH value of each tank are increased, and the utilization rate of the clean water is maximized; the efficiency of water circulation is improved; in addition, in the process of circularly supplying the clean water, the flow direction of the water is opposite to the running direction of the cleaning process of the steel pipe, so that the clean water can be firstly supplied to a secondary rinsing tank with the highest requirement on the pH value, and the efficient circulation of the water is realized.
According to the water recycling method of the embodiment, more rinsing tanks can be arranged before and after the steel pipe is subjected to acid cleaning in the production line of the steel pipe acid cleaning and the phosphating treatment, and according to the water recycling method, the more process tanks are arranged in the rinsing tanks, the higher the water utilization rate is; however, too many rinse water tanks increase the exposure time of the wire rod to air, with the risk of increased oxidation. According to the actual use situation, 2 to 3 rinsing tanks are suitable.
According to the technical scheme of the embodiment, in the process of supplying the clean water, as the flow direction of the water is opposite to the running direction of the cleaning process of the steel pipe, the clean water can be supplemented into the secondary rinsing tank with the highest requirement on the pH value at first; and the replenishment of the primary clean water can realize the replenishment of the clean water in each of the pre-cleaning tank, the primary rinsing tank, the high-pressure washing tank and the secondary rinsing tank, so that the efficiency of water circulation can be improved, and the cleaning efficiency of the production line can be further improved.
According to the technical scheme of the embodiment, by adopting the countercurrent water circulation method, the consumption of water can be reduced to 200 Kg/ton by taking each ton of steel pipes or wire rods to be cleaned as a unit; compared with the original water recycling method, the scheme of the invention has obvious water-saving effect, and the required water amount is only 1/3 of the water amount required by the original water recycling method; not only saves a large amount of valuable water resources, but also greatly reduces the production cost of enterprises, and has obvious economic benefit.
According to the technical scheme of the embodiment, the water recycling method for the automatic acid pickling and phosphating production line of the tunnel type steel pipe can be applied to acid pickling and phosphating treatment of steel materials in various shapes such as a plate body according to actual conditions, so that the recycling efficiency of water is improved, the cleaning efficiency of the production line is further improved, and the cost is reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A water recycling method for a tunnel type steel pipe acid pickling and phosphating production line is characterized in that a clean water tank is arranged in the tunnel type steel pipe acid pickling and phosphating production line and used for supplying clean water in the water circulation process; in the steel pipe pickling process, a pickling flushing tank is arranged beside a pickling tank, a separation tank adjacent to the pickling flushing tank is arranged beside the pickling flushing tank, and stirring devices are arranged in the pickling flushing tank and the separation tank and used for assisting a PH detection device and a liquid level detection device in PH detection and liquid level detection; the water recycling method is used for the water recycling process in a pre-cleaning tank, a primary rinsing tank, a high-pressure flushing tank and a secondary rinsing tank before and after steel pipe pickling, the pre-cleaning tank, the pickling tank, the primary rinsing tank, the high-pressure flushing tank and the secondary rinsing tank are sequentially arranged, each tank is provided with an overflow port and a water outlet, and each tank is respectively provided with a PH detection device and a liquid level detection device; the water recycling method comprises the following steps:
firstly, the initial liquid levels of the pre-cleaning tank, the primary rinsing tank and the secondary rinsing tank are kept at certain heights, so that the liquid levels of the steel pipes immersed in the pre-cleaning tank, the primary rinsing tank and the secondary rinsing tank are kept at the positions of overflow ports of the tanks;
step two, detecting the liquid level of the clean water tank by using a liquid level detector, and supplementing clean water to the clean water tank from the outside when the liquid level of the cleaning tank is at a low level so as to keep the liquid level of the clean water tank at a high liquid level;
detecting the PH value of the secondary rinsing tank by using a PH detection device, calculating the water quantity required for recovering the PH value of the secondary rinsing tank to a set high value when the PH value of the secondary rinsing tank is detected to be reduced to the set low value, extracting clean water with a corresponding water quantity from the clean water tank by using a water pump, and conveying the clean water to the secondary rinsing tank to recover the PH value of the secondary rinsing tank to the set high value;
step four, the liquid level of the secondary rinsing tank rises, the liquid level of the secondary rinsing tank is detected, and when the liquid level of the secondary rinsing tank is higher than the initial liquid level, water higher than the initial liquid level is discharged through an overflow port and is conveyed to the pickling and flushing tank;
fifthly, the liquid level of the pickling flushing tank rises, and the pH value of the pickling flushing tank is detected; when the PH value of the pickling flushing tank is normal, detecting the liquid level of the pickling flushing tank, and when the liquid level of the pickling flushing tank is higher than a high liquid level, extracting water higher than the high liquid level in the pickling flushing tank by using a water pump and conveying the water to the primary rinsing tank;
sixthly, increasing the liquid level of the primary rinsing tank, and detecting the pH value of the primary rinsing tank; when the PH value of the primary rinsing tank is normal, detecting the liquid level of the primary rinsing tank, and when the liquid level of the primary rinsing tank is higher than the initial liquid level, discharging water higher than the initial liquid level in the primary rinsing tank through an overflow port and conveying the water to the pre-rinsing tank;
and seventhly, the liquid level of the pre-cleaning tank rises, the liquid level of the pre-cleaning tank is detected, and when the liquid level of the pre-cleaning tank is higher than the initial liquid level, water higher than the initial liquid level in the pre-cleaning tank is discharged through an overflow port and conveyed into a wastewater treatment system.
2. The method according to claim 1, wherein in the fifth step, when the pH value of the pickling bath is detected to be at a set low value during detection of the pH value of the pickling bath, the amount of water required for the pH value of the pickling bath to return to a set high value is calculated; and (3) pumping clear water from the clear water tank by using a water pump, conveying the clear water to the secondary rinsing tank, and conveying the clear water to the acid washing and rinsing tank through the next circulation.
3. The method according to claim 1, wherein in the fifth step, when the liquid level of the pickling bath is detected to be lower than the initial liquid level, the amount of water required for the liquid level of the pickling bath to return to the initial liquid level is calculated; and (3) pumping clear water from the clear water tank by using a water pump, conveying the clear water to the secondary rinsing tank, and conveying the clear water to the acid washing and rinsing tank through the next circulation.
4. The method as claimed in claim 1, wherein in the sixth step, when the pH value of the primary rinsing tank is detected to be at a set low value during detection of the pH value of the primary rinsing tank, the amount of water required for the pH value of the primary rinsing tank to return to a set high value is calculated; and (3) pumping clear water from the clear water tank by using a water pump, conveying the clear water to the secondary rinsing tank, and conveying the clear water to the primary rinsing tank through the next circulation.
5. The method of claim 1,
and when the steel pipe after pre-cleaning, pickling and primary rinsing is conveyed to the high-pressure flushing tank, pumping water in the pickling flushing tank by using a flushing water pump, conveying the water to the high-pressure flushing tank, and performing high-pressure flushing on the steel pipe.
6. The method of claim 5,
conveying the acid-containing wastewater subjected to high-pressure washing to a separation tank adjacent to the acid washing and washing tank through a water outlet of the high-pressure washing tank; and filtering and precipitating;
the waste water after filtration and sedimentation in the cell flows back into the acid washing basin through a drain in the cell.
7. The method as claimed in any one of claims 1 to 6, wherein the water recycling method employs a counter-current water recycling method, and water conveyed from the clean water tank into the pickling line passes through the secondary rinsing tank, the pickling rinse tank, the primary rinsing tank and the pre-cleaning tank in sequence to raise the pH values of the secondary rinsing tank, the pickling rinse tank, the primary rinsing tank and the pre-cleaning tank and raise the liquid levels of the secondary rinsing tank, the pickling rinse tank, the primary rinsing tank and the pre-cleaning tank.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114835170A (en) * | 2022-06-06 | 2022-08-02 | 湖南华菱涟钢特种新材料有限公司 | Production process of iron oxide powder with low calcium content |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315318A (en) * | 2011-07-07 | 2012-01-11 | 苏州赤诚洗净科技有限公司 | Water-saving washing device of solar battery silicon wafer |
| CN103357608A (en) * | 2013-07-18 | 2013-10-23 | 上海宝锋工程技术有限公司 | System and method for cleaning acid-washed metal materials |
| CN203741425U (en) * | 2014-01-22 | 2014-07-30 | 江苏亨特宏业重工有限公司 | Energy-saving environment-friendly chemical cleaning device of stretch bending and straightening machine |
-
2021
- 2021-04-07 CN CN202110376610.1A patent/CN113174598A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315318A (en) * | 2011-07-07 | 2012-01-11 | 苏州赤诚洗净科技有限公司 | Water-saving washing device of solar battery silicon wafer |
| CN103357608A (en) * | 2013-07-18 | 2013-10-23 | 上海宝锋工程技术有限公司 | System and method for cleaning acid-washed metal materials |
| CN203741425U (en) * | 2014-01-22 | 2014-07-30 | 江苏亨特宏业重工有限公司 | Energy-saving environment-friendly chemical cleaning device of stretch bending and straightening machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114835170A (en) * | 2022-06-06 | 2022-08-02 | 湖南华菱涟钢特种新材料有限公司 | Production process of iron oxide powder with low calcium content |
| CN114835170B (en) * | 2022-06-06 | 2023-11-28 | 湖南华菱涟钢特种新材料有限公司 | Production process of low-calcium-content ferric oxide powder |
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