CN212799945U

CN212799945U - Softening equipment and water treatment system

Info

Publication number: CN212799945U
Application number: CN202021329362.2U
Authority: CN
Inventors: 刘玲玲; 高云霄; 李桢
Original assignee: Zhonggong Water Co ltd
Current assignee: CAMCE Environmental Technology Co.,Ltd.
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-03-26
Anticipated expiration: 2030-07-08

Abstract

The utility model provides a softening equipment and water processing system, relates to water treatment technical field, the softening equipment includes first reaction box, ion exchanger and second reaction box, first reaction box with the second reaction box is used for carrying out filtration treatment to liquid, first reaction box with ion exchanger's income liquid mouth intercommunication, ion exchanger's regeneration liquid export with the income liquid mouth intercommunication of second reaction box, the liquid outlet of second reaction box with ion exchanger's income liquid mouth intercommunication. It can carry out filtration treatment with regeneration waste liquid through the second reaction tank that sets up alone to need not to set for higher two alkali addition for first reaction tank, reduced the waste of two alkalis to a certain extent.

Description

Softening equipment and water treatment system

Technical Field

The utility model relates to a water treatment field particularly, relates to a softening equipment and water treatment system.

Background

The industrial wastewater contains various suspended matters, inorganic ions, organic matters and the like, and the industrial wastewater needs to be pretreated and softened before advanced treatment or reuse. In the prior pretreatment softening process, after the industrial wastewater is subjected to the double-alkali reaction in the reactor, a small amount of residual hardness ions can be further removed by an ion exchanger, but when the ion exchanger fails, the ion exchange capacity needs to be recovered by periodic regeneration. In one treatment mode, the regenerated waste liquid is introduced into a waste water tank, filtered together with waste water in a reactor by a double alkali method, and then filtered by the ion exchanger for recycling.

The regenerated waste liquid has high hardness ions, and the amount of the double-alkali additive in the reactor needs to be increased after the regenerated waste liquid and the waste liquid enter the reactor together, so that the filtered liquid can meet the standard of the filtered liquid. However, the regeneration waste liquid is generated only when the ion exchanger is subjected to regeneration treatment, and most of the time, the waste water entering the reactor does not contain the regeneration waste liquid, so that the demand of the double alkali is relatively small. However, in order to ensure that the filtered liquid can always meet the standard of the filtered liquid, the input amount of the dibasic alkali is set according to a higher standard, which causes the waste of the dibasic alkali to a certain extent.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a softening equipment and water processing system, it can carry out filtration treatment with the regeneration waste liquid through the second reaction box that sets up alone to need not to set for higher two alkali addition for first reaction box, reduced the waste of two alkalis to a certain extent.

The utility model discloses a realize like this:

the utility model provides a softening equipment, its includes first reaction box, ion exchanger and second reaction box, first reaction box with the second reaction box is used for carrying out filtration treatment to liquid, first reaction box with ion exchanger's income liquid mouth intercommunication, ion exchanger's regeneration liquid export with the income liquid mouth intercommunication of second reaction box, the liquid outlet of second reaction box with ion exchanger's income liquid mouth intercommunication.

In a possible embodiment, a first tubular membrane filtration device is arranged between the first reaction tank and the ion exchanger.

In a possible embodiment, the first reaction box is communicated with the first tubular membrane filtering device through a first pipeline, and the liquid outlet of the second reaction box is communicated with the first pipeline.

In a possible embodiment, the first tubular membrane filtration device is communicated with the ion exchanger through a second pipeline, and the liquid outlet of the second reaction box is communicated with the second pipeline.

In a possible embodiment, a second tubular membrane filtration device is communicated between the second reaction box and the second pipeline.

In a possible embodiment, a stirrer is arranged in the first reaction tank.

In a possible embodiment, the first reaction tank is provided with a drain outlet, which is connected with a sludge pump.

In a possible embodiment, it also comprises a regenerant tank, said ion exchanger being in communication with said regenerant tank.

In a possible embodiment, a stirrer is arranged in the second reaction tank.

A water treatment system comprising a softening apparatus as claimed in any preceding claim.

The utility model discloses beneficial effect includes at least:

in the process of pretreating and softening the wastewater, the wastewater enters a first reaction box, double alkali (sodium hydroxide and sodium carbonate) is added into the first reaction box to preliminarily filter the wastewater, after reaction is carried out for a certain time, the filtered liquid in the first reaction box is introduced into an ion exchanger to further remove hardness ions in the ion exchanger, and the filtered water in the ion exchanger can be further treated or recycled after being discharged.

When an ion exchanger in the ion exchanger fails or is about to fail, introducing a regenerated liquid into the ion exchanger, discharging the regenerated waste liquid through a regenerated liquid outlet of the ion exchanger, introducing the discharged regenerated waste liquid into a second reaction box, adding dibasic (sodium hydroxide and sodium carbonate) into the second reaction box to preliminarily filter the regenerated waste water, discharging the filtered liquid in the second reaction box into the ion exchanger after the reaction is carried out for a certain time, and further removing hardness ions from the liquid discharged from the first reaction box and the liquid discharged from the second reaction box in the ion exchanger.

As described above, since the regenerated waste liquid does not return to the first reaction tank, the first reaction tank may set the amount of the dibasic acid to be added in accordance with the amount of the hardness ions in the waste liquid, and the amount of the hardness ions in the regenerated waste liquid does not need to be taken into consideration. The amount of the double alkali added into the second reaction tank is set according to the amount of the regeneration waste liquid, and the regeneration waste liquid entering the second reaction tank intermittently enters the second reaction tank, so the double alkali added into the regeneration waste liquid is also intermittently injected. In conclusion, when the softening equipment provided by the application is used, the use rate of the double alkali is higher, and the waste is less.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a system diagram of a softening apparatus according to an embodiment of the present invention in a first operating state;

fig. 2 is a system diagram of a softening apparatus according to an embodiment of the present invention in a second operating state;

FIG. 3 is a system diagram of another embodiment of the present invention;

FIG. 4 is a system diagram of another embodiment of a softening apparatus according to the present invention;

fig. 5 is a system diagram of another softening apparatus according to an embodiment of the present invention.

In the figure:

101-a first reaction box; 102-a first tubular membrane; 103-ion exchanger;

104-a second reaction box; 105-a second tubular membrane; 106-clear water tank;

107-regenerant tank; 108-sludge pump.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which the products of the present invention are usually placed in when they are used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the softening equipment or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

First embodiment

Referring to fig. 1 and fig. 2, the present embodiment provides a softening apparatus, which includes a first reaction tank 101, an ion exchanger 103, and a second reaction tank 104, where the first reaction tank 101 and the second reaction tank 104 are used to filter liquid, and specifically, in the present embodiment, both the first reaction tank 101 and the second reaction tank 104 are used to provide a place for a reaction between wastewater and double alkali, so as to filter wastewater.

The first reaction box 101 is communicated with a liquid inlet of the ion exchanger 103, a regeneration liquid outlet of the ion exchanger 103 is communicated with a liquid inlet of the second reaction box 104, and a liquid outlet of the second reaction box 104 is communicated with a liquid inlet of the ion exchanger 103.

As shown in fig. 1, in the process of pre-treating and softening wastewater, the wastewater enters a first reaction tank 101, sodium hydroxide and sodium carbonate are added into the first reaction tank 101, and are stirred and reacted for 15-30 minutes to perform primary filtration on the wastewater, the liquid generated after the filtration in the first reaction tank 101 enters an ion exchanger 103, hardness ions are further removed in the ion exchanger 103, and the liquid after the filtration in the ion exchanger 103 is discharged for further treatment or recycling.

The liquid discharged from the ion exchanger 103 may be directly passed to other water treatment facilities for further treatment. Alternatively, as shown in fig. 1 to 4, the liquid discharged from the ion exchanger 103 may be introduced into the clean water tank 106, and the clean water tank 106 is used for transferring and storing the filtered liquid, and the liquid in the clean water tank 106 may be directly led out for reuse, or the liquid in the clean water tank 106 may be led into other water treatment equipment for further treatment.

As shown in fig. 2, when the ion exchanger in the ion exchanger 103 is about to fail, on one hand, the wastewater still enters the first reaction tank 101 and the ion exchanger 103 according to the above-mentioned flow, meanwhile, the regeneration liquid is introduced into the ion exchanger 103, the regeneration liquid is generated after the reaction in the ion exchanger 103 is the regeneration waste liquid, the regeneration waste liquid is discharged through the regeneration liquid outlet of the ion exchanger 103, the discharged regeneration waste liquid enters the second reaction tank 104, sodium hydroxide and sodium carbonate are added into the second reaction tank 104, the stirring reaction is carried out for 15-30 minutes to primarily filter the regeneration waste water, after the reaction is carried out for a certain time, the filtered liquid in the second reaction tank 104 is introduced into the ion exchanger 103, and the liquid discharged in the second reaction tank 104 and the liquid discharged from the first reaction tank 101 are both introduced into the ion exchanger 103 to further remove hardness ions.

In order to improve the filtering effect of the wastewater, a first tubular membrane 102 filtering device is arranged between the first reaction box 101 and the ion exchanger 103. The first tubular membrane 102 filtration device comprises a tubular membrane, which can be an ultrafiltration membrane, a microfiltration membrane or a ceramic membrane, and is used for further filtering suspended matters in the liquid in the first reaction box 101.

The liquid discharged after being filtered by the first reaction tank 101 enters the first tubular membrane 102 filtering device, the liquid flowing out after being filtered by the tubular membranes in the first tubular membrane 102 filtering device is a first filtrate, and the first filtrate flows into the ion exchanger 103.

In a possible embodiment, as shown in fig. 5, the liquid discharged from the second reaction chamber 104 may also flow through the first tubular membrane 102 filtering device, specifically, the first reaction chamber 101 is communicated with the first tubular membrane 102 filtering device through a first pipeline, and the liquid outlet of the second reaction chamber 104 is communicated with the first pipeline. That is, the liquid flowing out of the second reaction tank 104 enters the first pipeline, and after being mixed with the liquid flowing out of the first reaction tank 101 in the first pipeline, the liquid enters the first tubular membrane 102 filtering device together, and the liquid filtered by the first tubular membrane 102 filtering device flows into the ion exchanger 103.

Alternatively, in a preferred embodiment, as shown in fig. 1-4, a second tubular membrane 105 filtration device is connected between the second reaction tank 104 and the second pipeline. The tubular membrane may be an ultrafiltration membrane, a microfiltration membrane, a ceramic membrane, or the like, and is used to further filter the suspension in the liquid in the second reaction chamber 104. The second tubular membrane 105 filtering device comprises a tubular membrane, and the tubular membrane in the second tubular membrane 105 filtering device and the tubular membrane in the first tubular membrane 102 filtering device can be the same or different in structure. With the arrangement, the liquid flowing out through the first reaction tank 101 is filtered by the first tubular membrane 102 filtering device, and the liquid flowing out through the second reaction tank 104 is filtered by the second tubular membrane 105 filtering device, so that the filtering efficiency is higher, and the filtering effect is better. Meanwhile, the second tubular membrane 105 filtering device is arranged to filter the liquid flowing out of the second reaction box 104, so that the working strength of the first tubular membrane 102 filtering device can be reduced.

Further, the first tubular membrane 102 filtration device is communicated with the ion exchanger 103 through a second pipeline, and the liquid outlet of the second reaction box 104 is communicated with the second pipeline. The liquid filtered by the second tubular membrane 105 filtering device is called second filtered liquid, and since the second filtered liquid is filtered by the second tubular membrane 105 filtering device, the second filtered liquid can be selected not to be passed into the first tubular membrane 102 filtering device, but to be directly passed into the ion exchanger 103. Because a second pipeline is communicated between the first tubular membrane 102 filtering device and the ion exchanger 103, and the liquid outlet of the second reaction box 104 is also communicated with the second pipeline through the pipeline, the second filtrate enters the second pipeline, and flows into the ion exchanger 103 together after being mixed with the first filtrate in the second pipeline.

In one embodiment, the ion exchanger 103 includes a regenerant inlet covered with a cover plate, and when the addition of the regenerant is desired, the cover plate at the regenerant inlet is removed and the regenerant is added to the ion exchanger 103.

Alternatively, as shown in fig. 3 and 4, in a preferred embodiment, the softening device further comprises a regenerant reservoir 107, the ion exchanger 103 being in communication with the regenerant reservoir 107. Specifically, a valve is provided between the ion exchanger 103 and the regenerant tank 107. The valve may be a solenoid valve. When the regenerant is required to be introduced into the ion exchanger 103, the valve between the ion exchanger 103 and the regenerant storage tank 107 is opened, so that the regenerant can flow into the ion exchanger 103.

Specifically, the valve may be installed at the regenerant inlet of the ion exchanger 103, at the outlet of the regenerant reservoir 107, or on the line between the ion exchanger 103 and the regenerant reservoir 107.

In a preferred embodiment of this embodiment, a valve is disposed between the ion exchanger 103 and the second reaction chamber 104. Specifically, the valve may be installed at a regenerant outlet of the ion exchanger 103, at a liquid inlet of the second reaction tank 104, or on a pipeline between the ion exchanger 103 and the second reaction tank 104. By controlling the valve between the ion exchanger 103 and the second reaction tank 104, the time for the regeneration waste liquid to flow into the second reaction tank 104 can be controlled.

In order to uniformly stir the wastewater in the first reaction tank 101 with the double alkali and make the double alkali and the wastewater sufficiently contact, a stirrer is preferably provided in the first reaction tank 101. The agitator may be of the following construction: the agitator includes driver, pivot and paddle, and the paddle is installed in the pivot, and the pivot is connected with the driver, and the driver is used for driving the pivot and rotates to drive the paddle and stir the liquid in first reaction box 101, in order to improve reaction rate. The driver can be a motor, and an output shaft of the motor is connected with the rotating shaft to drive the rotating shaft to rotate.

In a preferred embodiment, a stirrer is also installed in the second reaction box 104, and the stirrer is used for uniformly stirring the regenerated waste liquid in the second reaction box 104 and the dibasic so as to ensure that the dibasic is fully contacted with the regenerated waste liquid. The structure of the stirrer in the second reaction tank 104 may be the same as that in the first reaction tank 101.

To facilitate cleaning of the first reaction tank 101 from the slurry, in a preferred embodiment, the first reaction tank 101 is provided with a drain to which a sludge pump 108 is connected, as shown in fig. 3 and 4. In the first reaction tank 101, part of the components of the wastewater react with the double alkali and settle, and at the same time, part of the impurities with relatively large mass in the wastewater settle under the action of gravity and finally accumulate at the bottom of the first reaction tank 101. Therefore, at intervals, the sludge pump 108 is started to suck out the sludge sediment at the bottom of the first reaction tank 101.

Preferably, the drain of the first reaction tank 101 is provided at the bottom plate of the first reaction tank 101, or at a position below the side of the first reaction tank 101, so that the drain is close to a position where the silt is more accumulated.

Further, the second reaction box 104 is provided with a drain outlet, the drain outlet is connected with a sludge pump 108, and the sludge pump 108 is used for pumping out the slurry in the second reaction box 104. Since the second reaction tank 104 is used for filtering the regenerated waste liquid, and the regenerated liquid is intermittently injected into the ion exchanger 103, the amount of the generated regenerated waste liquid is much smaller than the amount of the wastewater introduced into the first reaction tank 101, so the amount of the sludge generated in the second reaction tank 104 is relatively small, and the service time interval of the sludge pump 108 connected with the second reaction tank 104 is longer than that of the sludge pump 108 of the first reaction tank 101.

Second embodiment

The present embodiment provides a water treatment system comprising the softening device provided in the first embodiment described above.

Since the water treatment system provided by this embodiment includes the softening device provided by the first embodiment, the water treatment system provided by this embodiment at least has the advantages of the softening device, and thus, no further description is provided herein.

Further, the water treatment system may include other filtration treatment devices in addition to the softening device. For example, a sand filtering device, an activated carbon filtering device and other devices for removing suspended matters and solid matters in water can be arranged in front of the softening device, and a reverse osmosis device, an ultraviolet disinfection device and other devices for further purification can be arranged behind the softening device.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The softening equipment is characterized by comprising a first reaction box, an ion exchanger and a second reaction box, wherein the first reaction box and the second reaction box are used for filtering liquid, the first reaction box is communicated with a liquid inlet of the ion exchanger, a regenerated liquid outlet of the ion exchanger is communicated with a liquid inlet of the second reaction box, and a liquid outlet of the second reaction box is communicated with a liquid inlet of the ion exchanger.

2. The softening apparatus defined in claim 1, wherein a first tubular membrane filtration unit is disposed between the first reaction tank and the ion exchanger.

3. The softening apparatus according to claim 2, wherein the first reaction tank is communicated with the first tubular membrane filtering device through a first pipeline, and the liquid outlet of the second reaction tank is communicated with the first pipeline.

4. The softening apparatus according to claim 2, wherein the first tubular membrane filtration unit is in communication with the ion exchanger through a second pipeline, and the liquid outlet of the second reaction tank is in communication with the second pipeline.

5. The softening apparatus defined in claim 4, wherein a second tubular membrane filtration unit is connected between the second reaction tank and the second conduit.

6. The softening apparatus defined in claim 1, wherein an agitator is provided within the first reaction tank.

7. The softening apparatus of claim 1, wherein the first reaction tank is provided with a drain, the drain being connected to a sludge pump.

8. The softening apparatus of claim 1, further comprising a regenerant tank, the ion exchanger being in communication with the regenerant tank.

9. The softening apparatus defined in claim 1, wherein an agitator is provided in the second reaction tank.

10. A water treatment system comprising a softening apparatus as claimed in any one of claims 1 to 9.