Device for treating antimony-containing wastewater generated by cleaning polyester melt filter

Abstract

The utility model belongs to the technical field of wastewater treatment, and particularly relates to a device for treating antimony-containing wastewater generated by cleaning a polyester melt filter. Comprising a water inlet pipeline, a first-stage pH adjusting tank, a first-stage ferrous sulfate adjusting tank, a first-stage aeration oxidation tank, a first-stage reaction bin, a first-stage sedimentation tank, a second-stage pH adjusting tank, a second-stage ferrous sulfate adjusting tank, a second-stage aeration oxidation tank, a second-stage reaction bin, a second-stage sedimentation tank, an integrated air flotation device and a monitoring and discharging tank which are sequentially connected in the flowing direction of wastewater. The antimony-containing wastewater treatment device further comprises an alkali liquor dosing device, a ferrous sulfate dosing device, a polyferric sulfate dosing device, a PAM dosing device, a PAC dosing device and a PLC module. The device is simple to operate, high in automation degree and capable of effectively improving the removal efficiency of antimony in the antimony-containing wastewater.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and in particular relates to a device for treating antimony-containing wastewater generated by cleaning a polyester melt filter. Background Art

[0002] In textile printing and dyeing, antimony-containing catalysts, such as antimony acetate and antimony glycol, are often used during the synthesis of polyester fibers (the raw material for polyester) to improve raw material conversion. However, during the synthesis process, the antimony element is evenly dispersed in a free state throughout the polyester fibers. When these fibers enter printing and dyeing plants or weaving mills for further processing, the free antimony enters the wastewater during desizing and alkali reduction processes and settles, posing a serious threat to drinking water safety in my country. Therefore, removing the antimony deposited in printing and dyeing wastewater has become a key issue for printing and dyeing companies. Currently, there are few treatment options for antimony-containing wastewater, primarily including precipitation, electrochemical deposition, coagulation, microbial treatment, and adsorption. While each of these methods has its own advantages, they all have limitations, such as prolonged treatment time, high costs, and secondary pollution. Existing wastewater treatment technologies often require manual dosing, which wastes manpower and resources. Furthermore, there is no scientific statistical basis for dosing dosage, making it difficult to optimize treatment methods without data support. Therefore, effective treatment of antimony-containing wastewater is imminent, and there is an urgent need for a device for treating antimony-containing wastewater generated by cleaning polyester melt filters to solve the above-mentioned problems existing in the current treatment of antimony-containing wastewater. Utility Model Content

[0003] The purpose of the utility model is to provide a device for treating antimony-containing wastewater generated by cleaning a polyester melt filter, thereby shortening the treatment time and reducing the treatment cost.

[0004] A device for treating antimony-containing wastewater generated by cleaning a polyester melt filter, characterized by comprising: a water inlet pipe, a primary pH regulating tank, a primary ferrous sulfate regulating tank, a primary aeration oxidation tank, a primary reaction chamber, a primary sedimentation tank, a secondary pH regulating tank, a secondary ferrous sulfate regulating tank, a secondary aeration oxidation tank, a secondary reaction chamber, a secondary sedimentation tank, an integrated flotation device, and a monitoring and discharge tank, which are sequentially connected along the flow direction of the wastewater;

[0005] The antimony-containing wastewater treatment device for cleaning polyester melt filters also includes an alkali solution dosing device, a ferrous sulfate dosing device, a polyferric sulfate dosing device, a PAM dosing device, a PAC dosing device and a PLC module;

[0006] The alkali solution dosing device is connected to the primary pH regulating tank and the secondary pH regulating tank respectively, the ferrous sulfate dosing device is connected to the primary ferrous sulfate regulating tank and the secondary ferrous sulfate regulating tank respectively. The polyferric sulfate dosing device is connected to the primary reaction tank and the secondary reaction tank respectively;

[0007] The PAM dosing device is connected to the primary reaction chamber and the secondary reaction chamber respectively. The water outlet of the secondary sedimentation tank is provided with a secondary water collecting tank, and the secondary water collecting tank is connected to the PAM dosing device and the PAC dosing device.

[0008] Preferably, the ferrous sulfate dosing device is connected to the primary ferrous sulfate regulating tank and the secondary ferrous sulfate regulating tank respectively through dosing pipes, the polyferric sulfate is connected to the primary reaction chamber and the secondary reaction chamber respectively through dosing pipes, the PAM dosing device is connected to the primary reaction chamber, the secondary reaction chamber and the secondary water collection tank respectively through dosing pipes, and the PAC dosing device is connected to the secondary water collection tank through a dosing pipe, and each of the dosing pipes is provided with a dosing flowmeter and a dosing pump.

[0009] Preferably, the first-level pH regulating tank, the second-level pH regulating tank, the first-level ferrous sulfate regulating tank, and the second-level ferrous sulfate regulating tank are all provided with an online pH meter, each of the online pH meters is electrically connected to the dosing pump on the dosing pipe in the tank where it is located, and each of the online pH meters and dosing pumps are electrically connected to the PLC module.

[0010] Preferably, a pipeline mixer is provided between the secondary water collecting tank and the integrated air flotation device.

[0011] Preferably, the first-level pH regulating tank, the second-level pH regulating tank, the first-level ferrous sulfate regulating tank, the second-level ferrous sulfate regulating tank, the first-level reaction tank, and the second-level reaction tank are all provided with a constant speed stirring device.

[0012] Preferably, the primary pH regulating tank, the primary ferrous sulfate regulating tank, and the primary aeration oxidation tank are integrated into one design, and the secondary pH regulating tank, the secondary ferrous sulfate regulating tank, and the secondary aeration oxidation tank are integrated into one design.

[0013] Preferably, a water inlet flow meter is provided on the water inlet pipe, and the water inlet flow meter is electrically connected to the PLC module.

[0014] Preferably, the first-stage aeration oxidation tank, the second-stage aeration oxidation tank, the integrated flotation device, and the monitoring and discharge tank are all provided with liquid level gauges.

[0015] Preferably, the primary aeration oxidation tank and the secondary aeration oxidation tank are both connected to Roots blowers.

[0016] Preferably, both the primary sedimentation tank and the secondary sedimentation tank are provided with a liftable scraper.

[0017] Beneficial effects

[0018] The utility model utilizes ferrous sulfate to treat antimony-containing wastewater. By adjusting the pH value of the antimony-containing wastewater and then adding ferrous sulfate, the removal efficiency of antimony in the wastewater is effectively improved, and the processing time is saved. The PLC module is used to interlock and control various devices to achieve automatic dosing and save labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] In the figure: 1. Dosing pipeline, 2. Primary pH adjustment tank, 3. Primary ferrous sulfate adjustment tank, 4. Primary aeration oxidation tank, 5. Primary reaction chamber, 6. Primary sedimentation tank, 7. Secondary pH adjustment tank, 8. Sludge collection tank, 9. Secondary ferrous sulfate adjustment tank, 10. Secondary aeration oxidation tank, 11. Secondary reaction chamber, 12. Secondary sedimentation tank, 13. Secondary water collection tank, 14. Pipeline mixer, 15. Integrated flotation device, 16. Monitoring and discharge tank, 17. Alkali dosing device, 18. Ferrous sulfate dosing device, 19. Polyferric sulfate dosing device, 20. PAM dosing device, 21. PAC dosing device, 22. Roots blower, 23. Water inlet pipeline, 24. Sewage lifting pump. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] In this utility model, unless otherwise specified or limited, the terms "disposed," "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed or detachable connections, mechanical connections, direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0024] like Figure 1As shown, a device for treating antimony-containing wastewater generated by cleaning a polyester melt filter comprises an inlet pipe 23, a primary pH regulating tank 2, a primary ferrous sulfate regulating tank 3, a primary aeration oxidation tank 4, a primary reaction chamber 5, a primary sedimentation tank 6, a secondary pH regulating tank 7, a secondary ferrous sulfate regulating tank 9, a secondary aeration oxidation tank 10, a secondary reaction chamber 11, a secondary sedimentation tank 12, an integrated flotation device 15, and a monitoring and discharge tank 16, which are sequentially connected along the flow direction of the wastewater; the device for treating antimony-containing wastewater generated by cleaning a polyester melt filter further comprises an alkali dosing device 17, a ferrous sulfate dosing device 18, a polyferric sulfate dosing device 19, a PAM dosing device 20, a PAC dosing device 21, and a PLC module (not shown in the figure); the alkali dosing device, the ferrous sulfate dosing device, the polyferric sulfate dosing device, the PAM dosing device, and the PAC dosing device are all dosing barrels. The alkali solution dosing device is respectively connected to the primary pH regulating tank and the secondary pH regulating tank, the ferrous sulfate dosing device is respectively connected to the primary ferrous sulfate regulating tank and the secondary ferrous sulfate regulating tank, and the polyferric sulfate dosing device is respectively connected to the primary reaction tank and the secondary reaction tank; the PAM dosing device is respectively connected to the primary reaction tank and the secondary reaction tank, and the secondary sedimentation tank is provided with a secondary water collection tank 13, and the secondary water collection tank is connected to the PAM dosing device and the PAC dosing device. PAC is an inorganic polymer coagulant, referred to as polyaluminum, and the Chinese name of PAM is polyacrylamide, which is used for sludge dewatering.

[0025] The ferrous sulfate dosing device is connected to the primary ferrous sulfate regulating tank and the secondary ferrous sulfate regulating tank through dosing pipes, respectively. The polyferric sulfate is connected to the primary reaction chamber and the secondary reaction chamber through dosing pipe 1, respectively. The PAM dosing device is connected to the primary reaction chamber, the secondary reaction chamber and the secondary water collection tank through dosing pipes, respectively. The PAC dosing device is connected to the secondary water collection tank through a dosing pipe. Each dosing pipe is provided with a dosing flowmeter (not shown in the figure) and a dosing pump (not shown in the figure). An online pH meter (not shown in the figure) is provided in the primary pH regulating tank, the secondary pH regulating tank, the primary ferrous sulfate regulating tank, and the secondary ferrous sulfate regulating tank. Each online pH meter is electrically connected to the dosing pump on the dosing pipe in the tank where it is located. Each online pH meter and the dosing pump are electrically connected to the PLC module. The online pH meter sends the measured pH value to the PLC module. The PLC module decides which dosing pump to open or close according to the preset value, thereby realizing the function of automatic addition of the agent. The dosing flow meter is electrically connected to the PLC module. The dosing flow meter can count the amount of dosing each time and send the dosing amount data to the PLC module to facilitate the later statistics of the dosing amount.

[0026] A pipeline mixer is installed between the secondary sump and the integrated flotation system. This mixer can fully mix the PAM and PAC reagents with the wastewater. This mixer achieves mixing without any mechanical moving parts, resulting in a simple structure and easy maintenance. The integrated flotation system uses an integrated flotation machine, which is electrically connected to the PLC module. The primary pH adjustment tank, secondary pH adjustment tank, primary ferrous sulfate adjustment tank, secondary ferrous sulfate adjustment tank, primary reaction chamber, and secondary reaction chamber are all equipped with a constant-speed stirring device (not shown). The constant-speed stirring device includes a stirring motor and a stirring paddle. The stirring motor is located above the corresponding treatment tank, and a stirring paddle is connected below each stirring motor. Each stirring motor is electrically connected to the PLC module.

[0027] The first-level pH regulating tank, the first-level ferrous sulfate regulating tank, and the first-level aeration oxidation tank are integrated. The second-level pH regulating tank, the second-level ferrous sulfate regulating tank, and the second-level aeration oxidation tank are integrated. The integrated design is a rectangular treatment tank with an upper end open. This rectangular treatment tank is composed of three sequentially connected sub-treatment tanks connected in sequence. A partition is provided between the two sub-treatment tanks. A plurality of circular holes are provided under the partition. Wastewater can overflow through the circular holes.

[0028] Wastewater is in a continuous inflow process. By simply controlling the dosage based on experience, the wastewater can automatically overflow into the next treatment tank when it reaches the specified pH value. This integrated structure is a common method in the field of wastewater treatment and will not be described in detail here. A water inlet flowmeter (not shown) is installed on the water inlet pipe. The water inlet flowmeter is electrically connected to the PLC module. The water inlet flowmeter has a preset value. When the value reaches the preset value, the water inlet flowmeter sends an electrical signal to the PLC module, which controls the operation of the entire device.

[0029] The first-stage aeration oxidation tank, the second-stage aeration oxidation tank, the integrated flotation device, and the monitoring and discharge tank are all equipped with liquid level gauges (not shown in the figure). Each liquid level gauge is electrically connected to the PLC module. Each liquid level gauge can monitor the liquid level in the device in real time and transmit the liquid level data to the PLC module. The PLC module can monitor the liquid level in each device in real time through the data transmitted by each liquid level gauge. The first-stage aeration oxidation tank and the second-stage aeration oxidation tank are both connected to a Roots blower 22. The Roots blower can improve the aeration effect of the wastewater and improve the treatment efficiency. A sewage lift pump is provided between the first-stage aeration oxidation tank and the first-stage reaction chamber, and a sewage lift pump 24 is also provided between the second-stage aeration oxidation tank and the second-stage reaction chamber. The sewage lift pump is used to transfer sewage. The bottom of the primary and secondary sedimentation tanks are equipped with a sludge collecting hopper and a liftable scraper (not shown in the figure). The liftable scraper can scrape off the sludge in the primary and secondary sedimentation tanks. The liftable scraper has a torque display, which can reduce the risk of equipment operation. The liftable scraper is produced by Yanxin Environmental Protection, model BLED131-0.75. The PLC module in this device is produced by Siemens, model SIMATIC S7-200 SMART, the dosing pump in this device is produced by South Korea's Chisun, model KDV-23H-PTC, the online pH meter in this device is produced by Endress+Hauser, model CM442 / CPS11D / CYK10, the liquid level gauge in this device is produced by Endress+Hauser, model FMU30, the integrated flotation machine in this device is produced by Yanxin Environmental Protection, model BLED100-1505-0.75, the fixed-speed agitator in this device is produced by Jiangsu Yukes Transmission Machinery Co., Ltd., model YRF67-Y1.5KW-20-M4 / 250, and the pipeline mixer in this device is produced by Yanxin Environmental Protection, model GH-125.

[0030] How it works

[0031] The wastewater enters the primary pH adjustment tank, and alkali is added through the alkali dosing pipe and stirred at a constant speed to adjust the pH value of the wastewater in the pool to 11. When the pH value of the wastewater is adjusted to 11, it overflows into the primary ferrous sulfate adjustment tank. Ferrous sulfate is added through the ferrous sulfate dosing pipe and stirred at a constant speed to adjust the pH value of the wastewater to 7-8. The wastewater overflows into the primary aeration oxidation tank. The ferrous sulfate in the wastewater is rapidly oxidized into ferric hydroxide, and the antimony-containing substances in the wastewater can be adsorbed by ferric hydroxide. Then the wastewater is lifted to the primary reaction tank by the sewage lifting pump, and polyferric sulfate and PAM are added to the primary reaction tank in turn. After stirring at a constant speed, flowers are formed on the surface of the wastewater and then flow into the primary sedimentation tank for precipitation. The primary sedimentation tank is equipped with a primary water collection tank. The precipitated wastewater flows into the secondary pH adjustment tank, and alkali is added through the alkali dosing pipe and stirred at a constant speed to adjust the pH value to 11. The wastewater overflows into the secondary ferrous sulfate adjustment tank, and ferrous sulfate is added to the wastewater through the ferrous sulfate dosing pipe and stirred at a constant speed. After the pH value is adjusted to 7-8, the wastewater overflows into the secondary aeration oxidation pond, where the ferrous sulfate in the wastewater is rapidly oxidized into ferric hydroxide, and the antimony-containing substances in the wastewater are adsorbed. The wastewater is then pumped to the secondary reaction tank via a sewage lift pump, where polyferric sulfate and PAM are added in sequence. After constant-speed stirring to form a bloom on the surface of the wastewater, the wastewater flows into the secondary sedimentation tank for precipitation. The secondary sedimentation tank is provided with a secondary water collection tank, where the wastewater is precipitated. Two dosing pipes are provided above the secondary water collection tank, one of which is connected to a PAC dosing device, and the other is connected to a PAM dosing device. One of the two dosing pipes adds PAM to the secondary water collection tank, and the other adds PAC. A pipeline mixer is provided between the secondary water collection tank and the integrated flotation device. After the addition of PAM and PAC, the wastewater flows into the pipeline mixer, where the wastewater is fully mixed with the reagents, and then flows into the integrated flotation device. After reaction in the integrated flotation device, it flows into the monitoring discharge tank.

[0032] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

Claims

1. A device for treating antimony-containing wastewater generated by cleaning polyester melt filters, characterized by: It includes an inlet pipe, a primary pH regulating tank, a primary ferrous sulfate regulating tank, a primary aeration oxidation tank, a primary reaction tank, a primary sedimentation tank, a secondary pH regulating tank, a secondary ferrous sulfate regulating tank, a secondary aeration oxidation tank, a secondary reaction tank, a secondary sedimentation tank, an integrated flotation device, and a monitoring and discharge tank, which are sequentially connected along the flow direction of the wastewater; The antimony-containing wastewater treatment device for cleaning polyester melt filters also includes an alkali solution dosing device, a ferrous sulfate dosing device, a polyferric sulfate dosing device, a PAM dosing device, a PAC dosing device and a PLC module; The alkali solution dosing device is respectively connected to the primary pH regulating tank and the secondary pH regulating tank, the ferrous sulfate dosing device is respectively connected to the primary ferrous sulfate regulating tank and the secondary ferrous sulfate regulating tank, and the polyferric sulfate dosing device is respectively connected to the primary reaction tank and the secondary reaction tank; The PAM dosing device is connected to the primary reaction chamber and the secondary reaction chamber respectively. The water outlet of the secondary sedimentation tank is provided with a secondary water collecting tank, and the secondary water collecting tank is connected to the PAM dosing device and the PAC dosing device.

2. The device for treating antimony-containing wastewater generated by cleaning a polyester melt filter according to claim 1, characterized in that: The ferrous sulfate dosing device is connected to the primary ferrous sulfate regulating tank and the secondary ferrous sulfate regulating tank through dosing pipes, respectively; the polyferric sulfate is connected to the primary reaction chamber and the secondary reaction chamber through dosing pipes, respectively; the PAM dosing device is connected to the primary reaction chamber, the secondary reaction chamber and the secondary water collection tank through dosing pipes, respectively; the PAC dosing device is connected to the secondary water collection tank through a dosing pipe, and each of the dosing pipes is provided with a dosing flowmeter and a dosing pump.

3. The device for treating antimony-containing wastewater generated by cleaning a polyester melt filter according to claim 2, characterized in that: The first-level pH regulating tank, the second-level pH regulating tank, the first-level ferrous sulfate regulating tank, and the second-level ferrous sulfate regulating tank are all equipped with online pH meters. Each of the online pH meters is electrically connected to the dosing pump on the dosing pipeline in the tank where it is located. Each of the online pH meters and the dosing pump is electrically connected to the PLC module.

4. The device for treating antimony-containing wastewater generated by cleaning a polyester melt filter according to claim 1, characterized in that: A pipeline mixer is provided between the secondary water collecting tank and the integrated air flotation device.

5. The device for treating antimony-containing wastewater generated by cleaning a polyester melt filter according to claim 1, characterized in that: The first-level pH regulating tank, the second-level pH regulating tank, the first-level ferrous sulfate regulating tank, the second-level ferrous sulfate regulating tank, the first-level reaction chamber, and the second-level reaction chamber are all provided with a constant-speed stirring device.

6. The device for treating antimony-containing wastewater generated by cleaning a polyester melt filter according to claim 1, characterized in that: The first-level pH regulating tank, the first-level ferrous sulfate regulating tank, and the first-level aeration oxidation tank are of integrated design; the second-level pH regulating tank, the second-level ferrous sulfate regulating tank, and the second-level aeration oxidation tank are of integrated design.

7. The device for treating antimony-containing wastewater generated by cleaning a polyester melt filter according to claim 1, characterized in that: A water inlet flow meter is provided on the water inlet pipe, and the water inlet flow meter is electrically connected to the PLC module.

8. The device for treating antimony-containing wastewater generated by cleaning a polyester melt filter according to claim 1, characterized in that: Liquid level gauges are provided in the primary aeration oxidation tank, the secondary aeration oxidation tank, the integrated air flotation device, and the monitoring and discharge tank.

9. The device for treating antimony-containing wastewater generated by cleaning a polyester melt filter according to claim 8, characterized in that: The primary aeration oxidation tank and the secondary aeration oxidation tank are both connected to Roots blowers.

10. The device for treating antimony-containing wastewater generated by cleaning a polyester melt filter according to claim 1, characterized in that: Both the primary sedimentation tank and the secondary sedimentation tank are provided with liftable scrapers.

Images