A nanofiltration membrane module for acid and alkali resistant and high-salt wastewater

Abstract

This utility model discloses a nanofiltration membrane module for acid and alkali resistant high-salt wastewater, relating to the field of wastewater treatment technology. It includes a filtration chamber, inside which a nanofiltration membrane body is fixedly installed. The input end of the filtration chamber is fixedly connected to a wastewater pretreatment chamber, which includes a chamber body, a stirring assembly, a neutralization assembly, a water quality monitor, a wastewater output pipe, and a control terminal. In this utility model, the water quality monitor monitors the acidity, alkalinity, and salinity of the wastewater. The monitoring data is transmitted to the control terminal, which outputs corresponding control commands to open the corresponding secondary electrically controlled valve. The neutralization solution inside the solution storage tank enters the chamber body through the secondary electrically controlled valve and the solution output pipe, neutralizing the wastewater or settling salt ions in the wastewater, thereby reducing the acidity, alkalinity, or salinity of the wastewater and preventing corrosion of the nanofiltration membrane body.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a nanofiltration membrane module for acid and alkali resistant and high-salt wastewater. Background Technology

[0002] A wastewater nanofiltration membrane module is a water treatment unit device assembled from nanofiltration membranes with specific retention properties in a certain structural form. Its core is the nanofiltration membrane, whose pore size is between that of ultrafiltration and reverse osmosis membranes. Under certain operating pressures, it utilizes the membrane's sieving effect and charge effect to effectively retain small-molecule organic matter, multivalent ions, colloids, and other substances in wastewater, while allowing water molecules and some monovalent ions to permeate, thereby achieving the treatment goals of wastewater purification, concentration, or recycling.

[0003] However, during the filtration process of wastewater containing acidic, alkaline, or high-salt components, the special chemical properties of this type of wastewater make it extremely easy to cause continuous corrosion to the filter membrane material. The filter membrane will gradually lose its original interception and separation functions, which not only fails to effectively filter and purify the wastewater, but may also cause the entire filtration system to fail due to irreversible damage to the membrane structure, increasing treatment costs. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the special chemical properties of wastewater cause continuous corrosion to the filter membrane material during the filtration process of wastewater containing acidic, alkaline or high-salt components, and to propose an acid- and alkali-resistant nanofiltration membrane module for high-salt wastewater.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an acid and alkali resistant high-salt wastewater nanofiltration membrane module, comprising a filter chamber, wherein a nanofiltration membrane body is fixedly installed inside the filter chamber, and the input end of the filter chamber is fixedly connected to a wastewater pretreatment chamber, wherein the wastewater pretreatment chamber includes a chamber body, a stirring assembly, a neutralization treatment assembly, a water quality monitor, a wastewater output pipe, and a control terminal, wherein the drive end of the stirring assembly is located inside the chamber body, the output end of the neutralization treatment assembly is fixedly connected to the top of the chamber body, the sensing end of the water quality monitor is located inside the chamber body, and the water quality monitor and the neutralization treatment assembly are signal-connected to the control terminal.

[0006] Preferably, the neutralization treatment component includes three solution storage tanks, three second-order electrically controlled valves, and three solution output pipes. The output end of each solution storage tank is fixedly connected to one end of a second-order electrically controlled valve, and the other end of each second-order electrically controlled valve is fixedly connected to one end of a solution output pipe.

[0007] Preferably, the stirring assembly includes a drive motor, a speed reducer, a drive shaft, and several stirring blades. The drive end of the drive motor is connected to the input end of the speed reducer, the output end of the speed reducer is fixedly connected to one end of the drive shaft, and the several stirring blades are fixedly installed on the outside of the drive shaft.

[0008] Preferably, the two sides of the silo are fixedly connected to support frames by bolts.

[0009] Preferably, one end of the wastewater output pipe is fixedly connected to the output end of the chamber, the other end of the wastewater output pipe is fixedly connected to a first electrically controlled valve, and the other end of the first electrically controlled valve is fixedly connected to the input end of the filter chamber.

[0010] Preferably, a wastewater inlet pipe is fixedly connected to the top of the silo.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, the water quality monitor monitors the acidity, alkalinity and salinity of the wastewater. The monitoring data is transmitted to the control terminal. The control terminal outputs corresponding control commands to open the corresponding No. 2 electric control valve. The neutralization solution inside the solution storage tank enters the interior of the chamber through the No. 2 electric control valve and the solution output pipe. It neutralizes the acidity and alkalinity of the wastewater or settles the salt ions in the wastewater, thereby reducing the acidity, alkalinity or salinity of the wastewater and preventing the wastewater from corroding the nanofiltration membrane.

[0012] 2. In this utility model, the drive shaft and stirring fan blades drive the wastewater inside the chamber to fully react with the neutralization solution, thereby increasing the reaction rate, reducing the time required for pretreatment, and promoting the formation of a uniform mixed system between the neutralization solution and the wastewater. This avoids the problem of incomplete reaction caused by local pH imbalance, thereby improving the neutralization efficiency and ensuring that the various indicators of the wastewater are more stable and meet the standards after pretreatment. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of an acid and alkali resistant, high-salt wastewater nanofiltration membrane module is provided for this utility model. Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This utility model provides a three-dimensional structural diagram of a neutralization treatment component in a nanofiltration membrane module for acid and alkali resistant and high-salt wastewater. Figure 4 This invention provides a schematic diagram illustrating the positional relationship between the stirring component and the chamber in a nanofiltration membrane module for acid and alkali resistant and high-salt wastewater.

[0014] Legend: 1. Filter chamber; 2. Wastewater pretreatment chamber; 21. Chamber body; 22. Agitator assembly; 221. Drive motor; 222. Gearbox; 223. Drive shaft; 224. Agitator blades; 23. Neutralization assembly; 231. Solution storage tank; 232. No. 2 electrically controlled valve; 233. Solution output pipe; 24. Water quality monitor; 25. Wastewater output pipe; 251. No. 1 electrically controlled valve; 26. Wastewater input pipe; 3. Support frame. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0017] Example 1: As Figure 1 - Figure 3 As shown, this utility model provides a nanofiltration membrane module for acid and alkali resistant high-salt wastewater, including a filter chamber 1. A nanofiltration membrane body is fixedly installed inside the filter chamber 1. The input end of the filter chamber 1 is fixedly connected to a wastewater pretreatment chamber 2. The wastewater pretreatment chamber 2 includes a chamber body 21, a stirring assembly 22, a neutralization treatment assembly 23, a water quality monitor 24, a wastewater output pipe 25, and a control terminal. The drive end of the stirring assembly 22 is located inside the chamber body 21. The output end of the neutralization treatment assembly 23 is fixedly connected to the top of the chamber body 21. The sensing end of the water quality monitor 24 is located inside the chamber body 21. The water quality monitor 24 and the neutralization treatment assembly 23 are signal-connected to the control terminal. Component 23 includes three solution storage tanks 231, three second-order electrically controlled valves 232, and three solution output pipes 233. The output end of the solution storage tank 231 is fixedly connected to one end of the second-order electrically controlled valve 232, and the other end of the second-order electrically controlled valve 232 is fixedly connected to one end of the solution output pipe 233. Support frames 3 are fixedly connected to both sides of the chamber 21 by bolts. Wastewater input pipe 26 is fixedly connected to the top of the chamber 21. One end of the wastewater output pipe 25 is fixedly connected to the output end of the chamber 21, and the other end of the wastewater output pipe 25 is fixedly connected to the first-order electrically controlled valve 251. The other end of the first-order electrically controlled valve 251 is fixedly connected to the input end of the filter chamber 1.

[0018] The specific setup and function of this embodiment are described below. The wastewater to be filtered first enters the interior of the chamber 21 through the wastewater inlet pipe 26. Then, the water quality monitor 24 monitors the acidity, alkalinity, and salinity of the wastewater. The monitoring data is transmitted to the control terminal. The control terminal outputs a corresponding control command to open the corresponding second-order electrically controlled valve 232, so that the neutralization solution inside the solution storage tank 231 enters the interior of the chamber 21 through the second-order electrically controlled valve 232 and the solution outlet pipe 233. It neutralizes or settles the salt ions in the wastewater inside the chamber 21, thereby reducing the acidity, alkalinity, or salinity of the wastewater. After the wastewater treatment is completed, the first-order electrically controlled valve 251 is opened, and the wastewater enters the interior of the filter chamber 1 through the first-order electrically controlled valve 251. Then, it passes through the nanofiltration membrane body to achieve the filtration of the wastewater. Through the pretreatment of the wastewater, the acidity, alkalinity, and salinity of the wastewater are reduced, so that the wastewater will not corrode the nanofiltration membrane body.

[0019] Example 2: Figure 1 - Figure 4 As shown, the acid and alkali resistant high-salt wastewater nanofiltration membrane module of this utility model includes a filter chamber 1, in which a nanofiltration membrane body is fixedly installed. The input end of the filter chamber 1 is fixedly connected to a wastewater pretreatment chamber 2. The wastewater pretreatment chamber 2 includes a chamber body 21, a stirring assembly 22, a neutralization treatment assembly 23, a water quality monitor 24, a wastewater output pipe 25, and a control terminal. The drive end of the stirring assembly 22 is located inside the chamber body 21, and the output end of the neutralization treatment assembly 23 is fixedly connected to the top of the chamber body 21. The sensing end of the water quality monitor 24 is located inside the tank body 21. The water quality monitor 24 and the neutralization treatment component 23 are connected to the control terminal signal. The stirring component 22 includes a drive motor 221, a speed changer 222, a drive shaft 223 and several stirring blades 224. The drive end of the drive motor 221 is connected to the input end of the speed changer 222. The output end of the speed changer 222 is fixedly connected to one end of the drive shaft 223. Several stirring blades 224 are fixedly installed on the outside of the drive shaft 223.

[0020] The overall effect of this embodiment is that when the neutralizing solution enters the interior of the chamber 21 and reacts with the wastewater, the drive motor 221 drives the speed reducer 222 to work, the speed reducer 222 drives the drive shaft 223 to rotate, and the drive shaft 223 and the stirring fan blades 224 drive the wastewater inside the chamber 21 to react fully with the neutralizing solution, thereby increasing the reaction rate, reducing the time required for pretreatment, promoting the formation of a uniform mixed system between the neutralizing solution and the wastewater, avoiding incomplete reaction caused by local pH imbalance, thereby improving the neutralization efficiency and ensuring that the various indicators of the wastewater are more stable and meet the standards after pretreatment.

[0021] The operating method and working principle of this device are as follows: The wastewater to be filtered first enters the interior of the chamber 21 through the wastewater inlet pipe 26. Then, the water quality monitor 24 monitors the acidity, alkalinity and salinity of the wastewater. The monitoring data is transmitted to the control terminal. The control terminal outputs the corresponding control command to open the corresponding second-level electric control valve 232, so that the neutralization solution inside the solution storage tank 231 enters the interior of the chamber 21 through the second-level electric control valve 232 and the solution outlet pipe 233. It neutralizes the acidity or alkalinity of the wastewater or settles the salt ions in the wastewater, thereby reducing the acidity or alkalinity or salinity of the wastewater. After the wastewater treatment is completed, the first-level electric control valve 251 is opened, and the wastewater enters the interior of the filter chamber 1 through the first-level electric control valve 251. Then, it passes through the nanofiltration membrane body to achieve the filtration of the wastewater.

[0022] When the neutralizing solution enters the interior of the chamber 21 and reacts with the wastewater, the drive motor 221 drives the speed reducer 222 to work, the speed reducer 222 drives the drive shaft 223 to rotate, and the drive shaft 223 and the stirring fan blades 224 cause the wastewater inside the chamber 21 to react fully with the neutralizing solution.

[0023] The above are merely preferred embodiments of this utility model and are not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from the technical solution of this utility model shall still fall within the protection scope of this utility model.

Claims

1. A nanofiltration membrane module for acid and alkali resistant and high-salt wastewater, comprising a filter chamber (1), wherein a nanofiltration membrane body is fixedly installed inside the filter chamber (1), characterized in that: The input end of the filter chamber (1) is fixedly connected to the wastewater pretreatment chamber (2). The wastewater pretreatment chamber (2) includes a chamber body (21), a stirring assembly (22), a neutralization assembly (23), a water quality monitor (24), a wastewater output pipe (25), and a control terminal. The driving end of the stirring assembly (22) is located inside the chamber body (21). The output end of the neutralization assembly (23) is fixedly connected to the top of the chamber body (21). The sensing end of the water quality monitor (24) is located inside the chamber body (21). The water quality monitor (24) and the neutralization assembly (23) are connected to the control terminal.

2. The acid- and alkali-resistant high-salt wastewater nanofiltration membrane module according to claim 1, characterized in that: The neutralization treatment component (23) includes three solution storage tanks (231), three second-order electrically controlled valves (232), and three solution output pipes (233). The output end of the solution storage tank (231) is fixedly connected to one end of the second-order electrically controlled valve (232), and the other end of the second-order electrically controlled valve (232) is fixedly connected to one end of the solution output pipe (233).

3. The acid- and alkali-resistant high-salt wastewater nanofiltration membrane module according to claim 1, characterized in that: The stirring assembly (22) includes a drive motor (221), a speed changer (222), a drive shaft (223), and several stirring blades (224). The drive end of the drive motor (221) is connected to the input end of the speed changer (222), and the output end of the speed changer (222) is fixedly connected to one end of the drive shaft (223). Several stirring blades (224) are fixedly installed on the outside of the drive shaft (223).

4. The acid- and alkali-resistant high-salt wastewater nanofiltration membrane module according to claim 1, characterized in that: The two sides of the silo body (21) are fixedly connected to the support frame (3) by bolts.

5. The acid- and alkali-resistant high-salt wastewater nanofiltration membrane module according to claim 1, characterized in that: One end of the wastewater output pipe (25) is fixedly connected to the output end of the chamber (21), and the other end of the wastewater output pipe (25) is fixedly connected to a first-level electrically controlled valve (251). The other end of the first-level electrically controlled valve (251) is fixedly connected to the input end of the filter chamber (1).

6. The acid- and alkali-resistant high-salt wastewater nanofiltration membrane module according to claim 1, characterized in that: The top of the silo (21) is fixedly connected to a wastewater inlet pipe (26).

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