CN218596135U - Alkali recovery system - Google Patents
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- CN218596135U CN218596135U CN202222982073.8U CN202222982073U CN218596135U CN 218596135 U CN218596135 U CN 218596135U CN 202222982073 U CN202222982073 U CN 202222982073U CN 218596135 U CN218596135 U CN 218596135U
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Abstract
The utility model discloses an alkali recovery system, wherein the alkali recovery system comprises a waste alkali collecting tank, an alkali recovery device and an automatic alkali preparation tank which are arranged in sequence; the waste alkali collecting tank is communicated with the multistage alkali washing tank and the multistage rinsing tank and is used for collecting waste alkali solution flowing out of the multistage alkali washing tank and the multistage rinsing tank; the alkali recovery device is used for recovering and purifying the waste alkali solution collected by the waste alkali collecting tank to prepare clean new alkali liquor. Has the advantages that: the utility model discloses thereby the spent caustic soda solution that will wash the alkali groove at different levels decontaminates through alkali recovery unit and purifies and become clean alkali solution and can recycle, to desizing, saving of the required alkali lye of alkali decrement is more, and is better to product quality's assurance effect, through purifying into clean alkali lye with spent caustic, makes it become better raw materials for production, more is favorable to the manufacturing enterprise to dispose required concentration according to the product demand, reaches the effect of sparingly using the alkali when guaranteeing the product quality.
Description
Technical Field
The utility model relates to a printing and dyeing pretreatment field, in particular to alkali recovery system.
Background
In the dyeing process of chemical fiber cloth, the dyeing pretreatment process usually needs to firstly carry out alkali washing desizing and alkali decrement, and then carry out water washing desizing and water washing cloth alkali removal, and especially when the alkali washing desizing and the alkali decrement are carried out, a large amount of liquid alkali is usually consumed. The alkali decrement is a term which is specially known in the printing and dyeing industry, and the fibers are grooved and even thinned after alkali treatment, so that the quality of the fibers is reduced, and the polyester fabric has soft hand feeling and soft luster, which is called as alkali decrement.
Therefore, how to effectively reduce the large consumption of the liquid alkali in the printing and dyeing pretreatment process and finally change the waste alkali liquid into clean new alkali liquid for recycling is a technical problem which is deeply concerned in the industry all the time.
For the Chinese patent with publication number CN106367941B in the prior art disclosed at present, a printing and dyeing pretreatment process and a desizing working solution formula of a cotton woven fabric are disclosed, wherein a low-concentration working solution is supplemented into a high-concentration working solution mainly in a tank inverting manner, so that the purposes of water saving and emission reduction are achieved, but the waste alkali liquor is still recycled in the whole tank inverting process, and the technical problem cannot be fundamentally solved only by supplementing the low-concentration waste alkali liquor with low pollutants into the high-concentration alkali liquor with high pollutants.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an alkali recovery system, it is huge to aim at solving current printing and dyeing pretreatment technology alkali consumption, and waste lye can not obtain purification treatment and forms clean alkali lye with cyclic utilization's problem.
In order to solve the problems, the utility model provides an alkali recovery system, which comprises a waste alkali collecting pool, an alkali recovery device and an automatic alkali distributing groove which are arranged in sequence;
the waste alkali collecting tank is communicated with the multistage alkali washing tank and the multistage rinsing tank and is used for collecting waste alkali solution flowing out of the multistage alkali washing tank and the multistage rinsing tank;
the alkali recovery device is used for recovering and purifying the waste alkali solution collected by the waste alkali collecting tank and preparing clean new alkali liquor;
the automatic alkali distribution tank is used for obtaining new alkali liquor prepared by the alkali recovery device and preparing liquid alkali with the concentration required by the multi-stage alkali washing tank.
In one embodiment, the alkali recovery system further comprises a first spraying device, and the alkali liquor prepared by the automatic alkali preparation tank is sprayed onto the cloth in the multistage alkali washing tank by the first spraying device.
In one embodiment, the multiple alkaline wash tanks include a multiple alkaline wash tank for alkaline wash desizing and a multiple alkaline wash tank for alkaline abatement.
In one embodiment, the multi-stage washing tank comprises a multi-stage washing tank for water washing desizing and a multi-stage washing tank for water washing to remove alkali.
In one embodiment, the waste liquid flowing out of the multi-stage washing tank for washing and desizing enters a waste alkali collecting tank, and the waste liquid flowing out of the multi-stage washing tank for washing and removing alkali enters the waste water collecting tank.
In one embodiment, the alkali recovery system further comprises a second spraying device, and the clean water is sprayed onto the cloth in the multistage rinsing bath by the second spraying device.
Has the advantages that: the utility model discloses the alkali lye of washing the groove with alkaline at different levels is decontaminated and is purified to become clean new alkali solution and recycle through alkali recovery unit, can reduce the consumption of desizing, the required liquid caustic soda of alkali decrement in a large number, and the assurance effect to product quality is better, through purifying the alkali lye into clean alkali lye, makes it become better raw materials for production, more is favorable to manufacturing enterprise to dispose required alkali lye concentration according to the product demand, reaches the effect of sparingly using alkali when guaranteeing the product quality;
most of alkali liquor in the sewage discharged by the utility model is recovered, the difficulty and cost of sewage treatment are reduced, the change of waste alkali purification to the original production facilities is small, the sewage treatment effect is promoted, and the cost is reduced and the effect is improved integrally;
in addition, the matched automatic alkali distribution tank can accurately and quickly configure alkali liquor with required concentration, and the matched spray pump can enhance the desizing, alkali decrement and water washing effects, so that the soaking effect is better than that of the traditional soaking method, and the alkali is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flow chart of a prior art pre-treatment process for printing and dyeing;
FIG. 2 is a flow chart of the printing and dyeing pretreatment process of the present invention;
FIG. 3 is a flow chart of a pre-printing treatment process according to one embodiment of the present invention;
FIG. 4 is a flow chart of a pre-printing treatment process in another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; \8230;) are provided in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B", including either A or B or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an alkali recovery system, thereby can recycle through the alkali recovery unit waste alkali solution that will all levels wash with alkaline groove decontaminate and purify and become clean alkali solution, to the desizing, the saving of the required liquid caustic soda of alkali decrement is more, guarantee the effect to product quality is better, through purifying into clean alkali solution with waste alkali, make it to become better raw materials for production, more be favorable to manufacturing enterprise to dispose required concentration according to the product demand, reach the effect of sparingly using the alkali when guaranteeing the product quality.
The utility model discloses an alkali recovery system, most alkali lye has all been retrieved in the sewage of emission, can cyclic utilization destarch aquatic retrieval and utilization alkali, and the consumption of the liquid caustic soda that has significantly reduced and the blow off of destarch water have also reduced sewage treatment's the degree of difficulty and cost, and the alkali waste purifies and changes little to original production facility, has the promotion to the sewage treatment effect, whole cost reduction increase.
In addition, the matched automatic alkali distribution tank can accurately and quickly configure alkali liquor with required concentration, and the matched spray pump can enhance the desizing, alkali decrement and water washing effects, so that the soaking effect is better than that of the traditional soaking method, and the alkali is saved.
The alkali recovery system of the present invention will be described in detail with reference to the following examples.
The first embodiment is as follows:
in this embodiment, as shown in fig. 2, the alkali recovery system includes a waste alkali collecting tank, an alkali recovery device and an automatic alkali distributing tank which are sequentially arranged on the infusion tube in the liquid flowing direction, in order to make the liquid smoothly flow in the set direction in the infusion tube, the infusion tube is usually provided with an infusion pump for driving the liquid to smoothly flow in the set direction in the infusion tube, and a common infusion pump is a lift pump.
In this embodiment, as shown in fig. 2, the alkali recovery system further includes a multistage alkali washing tank and a multistage water washing tank, the waste alkali collecting tank is communicated with the multistage alkali washing tank and the multistage water washing tank, and is used for collecting waste liquid flowing out of the multistage alkali washing tank and the multistage water washing tank, the alkali content in the waste liquid flowing out of the multistage alkali washing tank and the multistage water washing tank is high, and pure new alkali liquor can be recovered and prepared for recycling of the printing and dyeing pretreatment process. It should be noted that the communication between the waste alkali collecting tank and the multistage alkali washing tank and the multistage water washing tank may be performed through a liquid conveying pipe, and it is needless to say that the waste alkali collecting tank directly receives and collects the waste liquid flowing out from the multistage alkali washing tank and the multistage water washing tank in other embodiments.
Further, in this embodiment, as shown in fig. 2, the multi-stage water washing tank further includes a multi-stage water washing tank for washing and desizing and a multi-stage water washing tank for washing and removing alkali. When the washing desizing and the washing cloth remove alkali and respectively independently adopt corresponding multistage washing tanks, only the waste liquid flowing out of the multistage washing tanks for washing desizing is sent into the waste alkali collecting tank, the alkali content in the waste liquid flowing out of the multistage washing tanks for washing cloth removing alkali is less, the necessity of recovery and purification treatment is avoided, and the part of waste liquid can be directly sent into the waste water collecting tank for sewage treatment. Of course, in other embodiments, as shown in fig. 3, when the concentration of the alkali solution in the alkali washing desizing is low, it is sufficient that the water washing desizing and the water washing cloth share one set of multi-stage washing tank for removing alkali, and at this time, the wastewater flowing out from the multi-stage washing tank is directly sent to the waste alkali collecting tank.
In this embodiment, as shown in fig. 2, the alkali recovery device is configured to recover and purify the waste alkali solution collected by the waste alkali collection tank to obtain clean new alkali solution for recycling in the pre-printing and dyeing treatment process, so as to greatly reduce the alkali consumption, and since the waste alkali solution is recovered, the amount of sewage to be treated is also reduced, the procurement cost of the alkali solution and the treatment cost of the sewage are both significantly reduced, and cost reduction and efficiency improvement of the pre-printing and dyeing treatment process are effectively promoted.
In this embodiment, as shown in fig. 2, the automatic alkali preparation tank is used for obtaining the new alkali liquor prepared by the alkali recovery device and preparing the new alkali liquor prepared by recovery into the alkali liquor with the concentration required by the multi-stage alkali washing tank, so that the alkali liquor consumption in the pre-printing and dyeing treatment process is greatly reduced, the procurement cost of the alkali liquor is greatly reduced, and the cost reduction and the efficiency improvement of the pre-printing and dyeing treatment process are effectively promoted.
In this embodiment, as shown in fig. 2, when the new alkali liquor prepared by the alkali recovery device is used to prepare the alkali liquor with the concentration required by the adaptive multistage alkali washing tank, the alkali liquor needs to be prepared and uniformly mixed by using a metering pump and a circulating pump, and when the concentration of the new alkali liquor prepared by the alkali recovery device is low and is not enough to prepare the alkali liquor with the concentration required by the adaptive multistage alkali washing tank, fresh alkali needs to be additionally supplemented to ensure that the alkali liquor with the concentration required by the adaptive multistage alkali washing tank is accurately and timely prepared.
In this embodiment, preferably, as shown in fig. 2, the multistage alkaline washing tank includes a multistage alkaline washing tank for alkaline washing desizing and a multistage alkaline washing tank for alkaline reduction. The design divides the process steps of alkaline washing desizing and alkaline decrement realized by one step in the prior art shown in figure 1 into two steps, the alkaline washing desizing is completed firstly, then the alkaline decrement is performed, and then the alkaline cloth is washed to remove the alkaline, so that the advantages that most of alkaline solution is only used as a desizing medium in the desizing link, the alkaline solution can be recycled in the process of the printing and dyeing pretreatment process, only a proper amount of alkaline solution needs to be added in the alkaline decrement link according to the production requirement and the product requirement, 60-70% of production alkaline in the original printing and dyeing pretreatment process can be saved, the usage amount of clear water can also be reduced in the subsequent alkali cloth removing link, the amount of sewage to be treated is reduced, the purchase cost of the alkaline solution and the treatment cost of the sewage are both remarkably reduced, and the cost reduction and the efficiency improvement of the printing and dyeing pretreatment process are effectively promoted.
In this embodiment, as shown in fig. 2, when the alkaline washing desizing and the alkaline decrement are separately and independently performed by using corresponding multiple alkaline washing tanks, two sets of automatic alkaline distribution tanks are also required to be provided, one set of automatic alkaline distribution tank prepares the alkaline solution for the alkaline washing desizing, and the other set of automatic alkaline distribution tank prepares the alkaline solution for the alkaline decrement.
Of course, in other embodiments, as shown in fig. 4, it may also be designed to use a set of multiple alkaline washing tanks including two alkaline washing tanks for alkaline washing and desizing according to different textile printing and dyeing products; the alkali decrement adopts a set of multi-stage alkali concentrating grooves comprising three alkali concentrating grooves so as to ensure the alkali decrement quality of the product. In fig. 4, in order to show the specific structure of the multistage alkaline washing tank and the multistage concentrated alkaline tank in detail, a drawing method of omitting the spent caustic collection tank and the automatic caustic distribution tank is adopted.
In fig. 2, the multistage rinsing bath includes the multistage rinsing bath for water washing desizing and the multistage rinsing bath for washing cloth removes alkali, and the waste liquid that the multistage rinsing bath for water washing desizing flows out gets into the alkali waste collecting pit, and the waste liquid that the multistage rinsing bath for washing cloth removes alkali flows out gets into the waste water collecting pit. By the design, waste liquid generated by water washing desizing and water washing cloth alkali removal can be accurately classified, and the waste alkali recovery and sewage treatment efficiency is improved. Because the concentration of the waste alkali in the waste liquid generated by washing and desizing is higher, the waste alkali has the value of alkali liquor recovery, the concentration of the waste alkali in the waste liquid generated by removing the alkali from the washed cloth is lower, and the alkali is not required to be recovered, so that the washing and desizing and the alkali removal from the washed cloth are separated, a multi-stage washing tank is independently adopted to accurately classify and treat the waste liquid generated by removing the alkali from the washed cloth, the alkali recovery and sewage treatment efficiency is improved, the alkali recovery and sewage treatment cost is reduced, and the cost reduction and the efficiency improvement of the printing and dyeing pretreatment process are effectively promoted.
In this embodiment, as shown in fig. 2, the alkali recovery system further includes a first spraying device, and the alkali liquor prepared by the automatic alkali preparation tank is sprayed onto the cloth in the multistage alkali washing tank by the first spraying device, so that the desizing effect is improved, the alkali washing desizing and alkali reduction effects are better than those of the traditional soaking effect, the alkali consumption is further reduced, and the cost reduction and the efficiency improvement of the printing and dyeing pretreatment process are further promoted.
Furthermore, in the embodiment, as shown in fig. 2, the alkali recovery system further comprises a second spraying device, and clean water is sprayed onto the cloth in the multistage rinsing bath by the second spraying device, so that the effects of washing and desizing and washing the cloth to remove alkali are enhanced, the water consumption is saved, and the cost reduction and the efficiency improvement of the printing and dyeing pretreatment process are further promoted.
In this embodiment, as shown in fig. 2, the number of stages of the multistage alkaline washing tank and the multistage rinsing tank can be flexibly set according to the fabric of the printing and dyeing pretreatment process, for example, as shown in fig. 3, the concentration of the alkaline liquid required for fabric alkaline washing desizing and alkali reduction treatment is low, so that the subsequent water washing desizing and water washing fabric alkali removal can share one set of three-stage rinsing tank, thereby not only reducing the equipment investment, but also reducing the water consumption, and effectively promoting the cost reduction and the efficiency improvement of the printing and dyeing pretreatment process; as shown in fig. 4, the concentration of alkali liquor required for the alkali washing and desizing and alkali reduction treatment of the cloth is relatively high, so that the cloth can be subjected to good alkali reduction treatment by adopting a three-stage concentrated alkali tank instead of a multi-stage alkali washing tank, and a set of two-stage washing tanks is independently adopted for subsequent alkali washing and desizing and water washing and cloth alkali removal.
The second embodiment:
the difference between the embodiment and the embodiment I is that the alkaline washing desizing and the alkaline decrement are shared by a set of multi-stage alkaline washing tank or multi-stage concentrated alkaline tank, so that the design can reduce the equipment investment of the alkaline washing tank and the process cost of the pre-printing and dyeing treatment compared with the embodiment I, and although the alkaline solution used for the alkaline decrement function is consumed by the desizing function and generates a large amount of sewage containing desizing water compared with the embodiment I, the alkaline in the sewage can be recovered by a subsequent alkaline recovery device, so that a large amount of alkaline solution is not additionally consumed, the amount of sewage needing to be treated is small, and the purchase cost of the alkaline solution and the treatment cost of the sewage are not increased.
Example three:
the embodiment discloses a method for recovering alkali, which comprises the following steps:
s1, obtaining waste alkali solutions flowing out of a multi-stage alkaline washing tank and a multi-stage rinsing tank, wherein when two sets of multi-stage rinsing tanks are provided, one set of multi-stage rinsing tanks is used for washing and desizing, and the other set of multi-stage rinsing tanks is used for rinsing cloth and removing alkali, waste liquid flowing out of the multi-stage rinsing tanks for washing and desizing enters a waste alkali collecting tank, and waste liquid flowing out of the multi-stage rinsing tanks for rinsing cloth and removing alkali enters a waste water collecting tank;
s2, purifying the waste alkali solution to prepare clean new alkali solution, so that the purchasing cost of the alkali solution and the treatment cost of sewage can be obviously reduced, the cost reduction and the efficiency improvement of the printing and dyeing pretreatment process are effectively promoted, and in addition, the wastewater generated in the process of treating the waste alkali solution is sent to a wastewater collection tank for sewage centralized treatment;
s3, preparing the alkali liquor with the concentration required by the adaptive multistage alkali washing tank by using clean new alkali liquor, wherein a metering pump and a circulating pump are required in the preparation process to accurately prepare the alkali liquor with the concentration required by the adaptive multistage alkali washing tank, and when the prepared new alkali liquor is low in concentration and is not enough to prepare the alkali liquor with the concentration required by the adaptive multistage alkali washing tank, additionally supplementing fresh alkali is required to ensure that the alkali liquor with the concentration required by the adaptive multistage alkali washing tank is accurately and timely prepared;
and S4, adding the prepared alkali liquor into a multi-stage alkali washing tank, so that the recycling of the waste alkali liquor is realized, and because the waste liquor generated by the multi-stage alkali washing tank is subjected to alkali recovery treatment, only part of sewage generated by the multi-stage water washing tank is sent to a sewage treatment station for centralized treatment, so that the sewage treatment capacity is remarkably reduced, and the recovered alkali can completely or partially replace fresh alkali liquor, so that the alkali consumption is remarkably reduced, the purchase cost of the alkali liquor and the treatment cost of the sewage are remarkably reduced, and the cost reduction and the efficiency improvement of the printing and dyeing pretreatment process are effectively promoted.
In this embodiment, when the alkaline washing desizing and the alkaline decrement are separately and independently performed in a set of multi-stage alkaline washing tanks in step S4, the prepared alkaline solution needs to be added into two sets of multi-stage alkaline washing tanks respectively.
In the embodiment, the prepared alkali liquor is uniformly sprayed onto the cloth in the multistage alkali washing tank, so that the desizing effect is improved, the alkali washing desizing and alkali decrement effects are better than those of the traditional soaking effect, the alkali consumption is further saved, and the cost reduction and the efficiency improvement of the printing and dyeing pretreatment process are further promoted.
In this embodiment, multistage wash bowl is including the multistage wash bowl that is used for washing desizing and the multistage wash bowl that is used for washing cloth to remove alkali for the waste liquid that the multistage wash bowl that is used for washing desizing flows gets into the alkali waste collecting pit, and the waste liquid that the multistage wash bowl that is used for washing cloth to remove alkali flows gets into the waste water collecting pit. By the design, waste liquid generated by water washing desizing and water washing cloth alkali removal can be accurately classified, and the waste alkali recovery and sewage treatment efficiency is improved. The waste liquid generated by washing and desizing has higher waste alkali concentration and has the value of recovering alkali liquor, and the waste liquid generated by washing and removing alkali by water has lower waste alkali concentration and does not need to recover alkali liquor. Therefore, the washing desizing and the washing cloth alkali removal are separated, and a set of multi-stage washing tanks are independently adopted to accurately classify the waste liquid generated by the washing desizing and the washing cloth alkali removal, so that the alkali recovery and sewage treatment efficiency is improved, the alkali recovery and sewage treatment cost is reduced, and the cost reduction and the efficiency improvement of the printing and dyeing pretreatment process are effectively promoted.
In this embodiment, step S2, the waste alkali solution and the desizing water are recycled by the alkali recycling device to obtain pure new alkali solution, so as to realize recycling of the alkali solution, thereby reducing consumption of a large amount of alkali solution; the waste alkali solution and the desizing water at the front section of the multi-stage rinsing bath and the desizing water and sewage at the rear section are separately discharged and treated, so that the problem that the sewage is mixed with a large amount of desizing water to increase the sewage treatment difficulty is avoided. Therefore, the dyeing pretreatment process of the embodiment can greatly reduce the procurement cost of the alkali solution and the treatment cost of the sewage.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the patent scope of the utility model, all be in the utility model discloses a under the design, utilize the equivalent structure transform of what the content of the description and the attached drawing was done, or direct/indirect application all includes in other relevant technical field the utility model discloses a patent protection is within range.
Claims (6)
1. An alkali recovery system is characterized by comprising a waste alkali collecting pool, an alkali recovery device and an automatic alkali distributing groove which are sequentially arranged;
the waste alkali collecting tank is communicated with the multistage alkali washing tank and the multistage rinsing tank and is used for collecting waste alkali solution flowing out of the multistage alkali washing tank and the multistage rinsing tank;
the alkali recovery device is used for recovering and purifying the waste alkali solution collected by the waste alkali collecting tank and preparing clean new alkali liquor;
the automatic alkali distribution tank is used for obtaining new alkali liquor prepared by the alkali recovery device and preparing the alkali liquor with the concentration required by the multi-stage alkali washing tank.
2. The alkali recovery system of claim 1, further comprising a first spraying device, wherein the alkali liquor prepared by the automatic alkali preparation tank is sprayed onto the cloth in the multi-stage alkali washing tank by the first spraying device.
3. The caustic recovery system of claim 1, wherein the multiple caustic wash tanks comprise a multiple caustic wash tank for caustic wash desizing and a multiple caustic wash tank for caustic abatement.
4. The soda recovery system of claim 1, wherein the multi-stage water wash tanks include a multi-stage water wash tank for water wash desizing and a multi-stage water wash tank for water wash dealkalization.
5. The alkali recovery system as claimed in claim 4, wherein the waste liquid from the multi-stage washing tank for washing and desizing enters the waste alkali collecting tank, and the waste liquid from the multi-stage washing tank for washing and removing alkali enters the waste water collecting tank.
6. The alkali recovery system of claim 1, further comprising a second spraying device, wherein the clean water is sprayed onto the cloth in the multi-stage washing tank by the second spraying device.
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| CN202222982073.8U CN218596135U (en) | 2022-11-09 | 2022-11-09 | Alkali recovery system |
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| CN202222982073.8U CN218596135U (en) | 2022-11-09 | 2022-11-09 | Alkali recovery system |
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| CN218596135U true CN218596135U (en) | 2023-03-10 |
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