Sewage calcium removal device for paper-making industry

Abstract

The utility model discloses a sewage calcium removal device for paper-making industry, which comprises a calcium removal box, the top of the calcium removal box is fixedly communicated with a water inlet pipe, the inner wall of the calcium removal box is fixedly provided with a transverse plate, and the calcium removal box, the water inlet pipe, the transverse plate, a water inlet cavity, a partition plate, a treatment cavity and a calcium removal agent adding device are matched for use. A proper amount of calcium removal agent is added into sewage, calcium ions and the calcium removal agent are subjected to a chemical reaction, insoluble precipitates are generated, the purpose of removing the calcium ions is achieved, the stirring assembly is arranged, the sewage and the calcium removal agent are fully stirred and mixed, the calcium removal agent can be effectively dispersed into the sewage, and the calcium removal effect is improved. According to the utility model, a chemical precipitation method is adopted, so that the calcium removal device has the characteristics of simplicity in operation and lower use cost. The calcium removal agent can be fully contacted and reacted within a short time, and the utilization efficiency of the calcium removal agent can be greatly improved, so that the calcium removal efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment in the papermaking industry, in particular to a wastewater decalcification device used in the papermaking industry. Background Art

[0002] In the papermaking industry, water is one of the indispensable raw materials and is used in multiple production links such as wet-end processes, washing, and dilution. However, the wastewater generated in the papermaking process usually contains high concentrations of calcium ions. These calcium ions mainly come from the mineral components in the raw materials (such as wood, waste paper, etc.) and the chemical additives added in the production process. Untreated calcium-containing wastewater is directly discharged into the environment, which will not only pollute the water body and destroy the ecological balance, but may also pose a potential threat to human health.

[0003] Traditional methods for decalcifying sewage mainly include lime softening, ion exchange, membrane separation, etc. However, these methods have some limitations in application. For example, the lime softening method will produce a large amount of sludge, which increases the difficulty and cost of subsequent treatment. The ion exchange method requires regular replacement of resin, which is cumbersome and costly. The membrane separation method has high requirements on water quality and is easily blocked and damaged by pollutants. Therefore, we need to propose a sewage decalcification device for the papermaking industry. Utility Model Content

[0004] The utility model aims to provide a sewage decalcification device for the papermaking industry, aiming to solve the problems in the prior art that the lime softening method will produce a large amount of sludge, increasing the difficulty and cost of subsequent treatment, the ion exchange method requires regular replacement of resin, the operation is cumbersome and the cost is high, and the membrane separation method has high requirements on water quality and is easily blocked and damaged by pollutants.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sewage decalcification device for the papermaking industry comprises a decalcification box, the top of which is fixedly connected to a water inlet pipe, a transverse plate is fixedly installed on the inner wall of the decalcification box, a water inlet cavity is reserved between the upper surface of the transverse plate and the inner top of the decalcification box, a partition is fixedly connected to the bottom of the transverse plate, the partition and the transverse plate separate the interior of the decalcification box into two treatment chambers, and decalcifying agent adding devices are fixedly connected to the side walls of the decalcification box, one end of two groups of the decalcifying agent adding devices are respectively connected to the interior of two groups of treatment chambers, and the interiors of the two groups of treatment chambers are respectively provided with stirring components for fully stirring the decalcifying agent and sewage.

[0007] Preferably, the stirring assembly includes a rotating rod, both ends of which are rotatably mounted on the inner walls of the decalcification box on both sides, one end of the rotating rod passes through the decalcification box and is connected to a driving motor, and a plurality of groups of stirring paddles are fixedly mounted on the outer wall of the rotating rod.

[0008] Preferably, the driving motor is fixedly mounted on a side wall of the decalcification box, and one end of the output shaft of the driving motor is fixedly connected to one end of the rotating rod.

[0009] Preferably, two groups of diverter pipes are fixedly connected at the bottom of the transverse plate, the water inlet chamber, the diverter pipe and the processing chamber are connected to each other, and a solenoid valve is arranged on the outer wall of the diverter pipe.

[0010] Preferably, guide plates are fixedly mounted on the inner walls of the two groups of processing chambers, respectively, and the two groups of guide plates are arranged at an incline.

[0011] Preferably, drainage grooves are respectively provided on the tops of the two groups of guide plates, drainage pipes are respectively fixedly connected to the side walls of the decalcification box, the two groups of drainage pipes are respectively connected to the two groups of drainage grooves, and valves are respectively provided on the outer walls of the two groups of drainage pipes.

[0012] Preferably, a control panel is fixedly mounted on one side wall of the decalcification box, and the decalcification agent adding device, the driving motor and the solenoid valve are all electrically connected to the control panel via wires.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model sets a decalcification box, a water inlet pipe, a horizontal plate, a water inlet chamber, a partition, a processing chamber and a decalcification agent adding device for coordinated use, and adds a proper amount of decalcification agent (such as sodium carbonate, sodium hydroxide, etc.) into the sewage to make the calcium ions react chemically with the decalcification agent to generate insoluble precipitates, thereby achieving the purpose of removing calcium ions. By setting a stirring component, the sewage and the decalcification agent are fully stirred and mixed, and the decalcification agent can be effectively dispersed in the sewage to ensure that the two are fully in contact and react in a short time. This can greatly improve the utilization efficiency of the decalcification agent, thereby improving the decalcification efficiency. The utility model adopts a chemical precipitation method, which is simple to operate and has the characteristics of low cost.

[0015] 2. In addition, the two groups of treatment chambers are used alternately. When one treatment chamber has completed the decalcification of the sewage, the staff needs to discharge the sewage and insoluble sediments. During this period, the sewage inside the water inlet chamber can be drained to another treatment chamber for decalcification. This alternating operation does not require shutdown for sewage discharge, which is conducive to further improving the efficiency of sewage decalcification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the shaft side of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure inside the decalcification box of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the stirring assembly and guide plate of the utility model.

[0020] In the figure: 1. decalcification box; 2. water inlet pipe; 3. cross plate; 4. water inlet chamber; 5. partition; 6. processing chamber; 7. decalcification agent adding device; 8. stirring assembly; 801. rotating rod; 802. driving motor; 803. stirring paddle; 9. diverter pipe; 10. solenoid valve; 11. guide plate; 12. drainage trough; 13. discharge pipe; 14. control panel. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 , the utility model provides a technical solution:

[0023] A wastewater decalcification device for papermaking industry comprises a decalcification box 1, the top of the decalcification box 1 is fixedly connected with a water inlet pipe 2, a transverse plate 3 is fixedly installed on the inner wall of the decalcification box 1, a water inlet cavity 4 is reserved between the upper surface of the transverse plate 3 and the inner top of the decalcification box 1, a partition 5 is fixedly connected to the bottom of the transverse plate 3, the partition 5 and the transverse plate 3 separate the interior of the decalcification box 1 into two processing chambers 6, and a decalcification agent adding device 7 is fixedly connected to the side walls of the decalcification box 1 on both sides, and the decalcification agent adding device 7 is used to add a decalcification agent to the interior of the processing chamber 6, and the decalcification agent adding device 7 comprises a storage container: a storage container for storing the decalcification agent, which is usually a sealed design to prevent decalcification. The agent gets damp or deteriorates. The size and number of storage containers should be determined according to the dosage and storage requirements of the decalcifying agent; including dosing pumps: the dosing pump is used to transport the decalcifying agent from the storage container to the sewage. The selection of the dosing pump should be determined according to the physical properties and dosage of the decalcifying agent to ensure that the decalcifying agent can be stably and continuously added to the sewage; including metering system: the metering system is responsible for accurately measuring the required decalcifying dosage. The metering system can use different types of equipment, such as flow meters, weighing sensors or metering pumps, etc., to ensure that the added decalcifying dosage is accurate and reliable; the dosing pump is electrically connected to the control panel, and the metering system is electrically connected to the control panel;

[0024] One end of the two groups of decalcifying agent adding devices 7 are respectively connected to the interior of the two groups of treatment chambers 6, and the interior of the two groups of treatment chambers 6 is respectively provided with stirring components 8 for fully stirring the decalcifying agent and sewage. The utility model sets the decalcifying box 1, the water inlet pipe 2, the horizontal plate 3, the water inlet chamber 4, the partition plate 5, the treatment chamber 6 and the decalcifying agent adding device 7 for coordinated use, and adds an appropriate amount of decalcifying agent (such as sodium carbonate, sodium hydroxide, etc.) into the sewage to make the calcium ions react chemically with the decalcifying agent to generate insoluble precipitates, thereby achieving the purpose of removing calcium ions. By setting the stirring component 8, the sewage and the decalcifying agent are fully stirred and mixed, and the decalcifying agent can be effectively dispersed in the sewage to ensure that the two are fully in contact and react in a short time. This can greatly improve the utilization efficiency of the decalcifying agent, thereby improving the decalcification efficiency. The chemical precipitation method is adopted, which has the characteristics of simple operation and low use cost;

[0025] The stirring assembly 8 includes a rotating rod 801, both ends of which are rotatably mounted on the inner walls of the decalcification box 1, one end of the rotating rod 801 passes through the decalcification box 1 and is connected to a driving motor 802, and a plurality of stirring paddles 803 are fixedly mounted on the outer wall of the rotating rod 801;

[0026] Specifically, the output shaft of the driving motor 802 can drive the rotating rod 801 to rotate, thereby driving a plurality of groups of stirring paddles 803 to rotate, so as to achieve the effect of fully and quickly mixing the sewage and the decalcifying agent, ensuring that the two are fully in contact and react in a short time, which can greatly improve the utilization efficiency of the decalcifying agent, thereby improving the decalcification efficiency;

[0027] The driving motor 802 is fixedly mounted on a side wall of the decalcification box 1, and one end of the output shaft of the driving motor 802 is fixedly connected to one end of the rotating rod 801. The driving motor 802 is configured as a stepping motor, which can provide high-precision position control and speed control, which means that the rotation angle, speed and direction of the stirring paddle 803 can be precisely controlled, thereby ensuring that the sewage and the decalcification agent can be evenly mixed and the decalcification efficiency is improved. The operation of the stepping motor is very stable, with low vibration and noise, which is particularly important for paper mills that require a quiet operating environment, and can reduce interference with workers and the surrounding environment. The driving method of the stepping motor is to control the size and direction of the current through a certain pulse. Compared with other types of motors, the power consumption of the stepping motor is relatively low, which helps to reduce the operating cost of the device and also meets the requirements of energy saving and environmental protection.

[0028] Two groups of shunt pipes 9 are fixedly connected at the bottom of the horizontal plate 3, and the water inlet chamber 4, the shunt pipe 9 and the treatment chamber 6 are interconnected, and a solenoid valve 10 is arranged on the outer wall of the shunt pipe 9. The two groups of solenoid valves 10 can be opened alternately to guide the sewage inside the water inlet chamber 4 to different treatment chambers 6 for decalcification. The two groups of treatment chambers 6 are used alternately. When one treatment chamber 6 has completed the decalcification of the sewage, the staff needs to discharge the sewage and insoluble sediments. During this period, the sewage inside the water inlet chamber 4 can be drained to another treatment chamber 6 for decalcification. In this way, the alternating work does not require shutdown for sewage discharge, which is conducive to further improving the efficiency of sewage decalcification.

[0029] Guide plates 11 are fixedly installed on the inner walls of the two groups of treatment chambers 6, and the two groups of guide plates 11 are inclined. Drainage grooves 12 are respectively opened on the tops of the two groups of guide plates 11. Drainage pipes 13 are fixedly connected to the side walls of the decalcification box 1 on both sides, and the two groups of drainage pipes 13 are respectively connected to the two groups of drainage grooves 12, and valves are respectively provided on the outer walls of the two groups of drainage pipes 13. By setting the guide plates 11 and the drainage grooves 12, the insoluble precipitates generated by the reaction of calcium ions and the decalcification agent are guided, and the insoluble precipitates can be easily discharged from the drainage pipes 13;

[0030] A control panel 14 is fixedly installed on one side wall of the decalcification box 1. The decalcification agent adding device 7, the driving motor 802 and the solenoid valve 10 are electrically connected to the control panel 14 through wires. The circuit connection is an existing mature technology. The specific connection method and working principle are not repeated here. The decalcification agent adding device 7, the driving motor 802 and the solenoid valve 10 can be started and stopped respectively through the control panel 14.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wastewater decalcification device for papermaking, comprising a decalcification tank (1), characterized in that: The top of the decalcification box (1) is fixedly connected to a water inlet pipe (2), the inner wall of the decalcification box (1) is fixedly mounted with a transverse plate (3), a water inlet chamber (4) is reserved between the upper surface of the transverse plate (3) and the inner top of the decalcification box (1), the bottom of the transverse plate (3) is fixedly connected to a partition plate (5), the partition plate (5) and the transverse plate (3) separate the interior of the decalcification box (1) into two processing chambers (6), the side walls of the decalcification box (1) are respectively fixedly connected to decalcification agent adding devices (7), one end of the two groups of the decalcification agent adding devices (7) are respectively connected to the interior of the two groups of processing chambers (6), and the interiors of the two groups of the processing chambers (6) are respectively provided with stirring components (8) for fully stirring the decalcification agent and sewage.

2. The wastewater decalcification device for papermaking according to claim 1, characterized in that: The stirring assembly (8) comprises a rotating rod (801), the two ends of the rotating rod (801) being rotatably mounted on the inner walls of the decalcification box (1) at both sides, one end of the rotating rod (801) passing through the decalcification box (1) and being connected to a driving motor (802), and a plurality of groups of stirring paddles (803) being fixedly mounted on the outer wall of the rotating rod (801).

3. The wastewater decalcification device for papermaking according to claim 2 is characterized in that: The driving motor (802) is fixedly mounted on a side wall of the decalcification box (1), and one end of an output shaft of the driving motor (802) is fixedly connected to one end of a rotating rod (801).

4. The wastewater decalcification device for papermaking according to claim 1, characterized in that: Two groups of diverter pipes (9) are fixedly connected at the bottom of the transverse plate (3), the water inlet chamber (4), the diverter pipe (9) and the processing chamber (6) are connected to each other, and a solenoid valve (10) is provided on the outer wall of the diverter pipe (9).

5. The wastewater decalcification device for papermaking according to claim 1, characterized in that: Guide plates (11) are fixedly mounted on the inner walls of the two groups of processing chambers (6), respectively, and the two groups of guide plates (11) are arranged in an inclined manner.

6. The wastewater decalcification device for papermaking according to claim 5, characterized in that: The tops of the two groups of guide plates (11) are respectively provided with drainage grooves (12), and the side walls of the decalcification box (1) are respectively fixedly connected with drainage pipes (13), the two groups of drainage pipes (13) are respectively connected to the two groups of drainage grooves (12), and valves are respectively provided on the outer walls of the two groups of drainage pipes (13).

7. The wastewater decalcification device for papermaking according to claim 1, characterized in that: A control panel (14) is fixedly mounted on a side wall of the decalcification box (1); the decalcification agent adding device (7), the drive motor (802) and the solenoid valve (10) are all electrically connected to the control panel (14) via wires.

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