Primary reaction tank scum defoaming treatment device

Abstract

The utility model belongs to the technical field of advanced sewage treatment, and particularly relates to a primary reaction tank scum defoaming treatment device which comprises a water storage tank, a Y-shaped filter, a booster pump, a communicating pipe, a pipeline sprayer and a primary reaction tank, a liquid inlet pipe is arranged at the upper part of the water storage tank; a first liquid outlet pipe is arranged at the lower part of the water storage tank; a liquid level detector is arranged on the side wall of the water storage tank; the Y-shaped filter comprises a liquid inlet end and a liquid outlet end; the outlet end of the first liquid outlet pipe is communicated with the liquid inlet end of the Y-shaped filter; the liquid outlet end of the Y-shaped filter is communicated with the inlet end of the booster pump; and the outlet end of the booster pump is communicated with the inlet end of the communicating pipe. According to the utility model, the pipeline sprayer is arranged above the first-stage reaction tank, and bubbles in scum in the first-stage reaction tank are subjected to wall breaking through high-pressure injection under the combined action of various devices by utilizing a spraying wall breaking technology, so that the scum is quickly defoamed; the problems that scum generated by the primary reaction tank is not easy to precipitate and is not easy to squeeze and dewater are solved.

Description

Technical Field

[0001] This utility model belongs to the field of advanced wastewater treatment technology, specifically relating to a device for defoaming scum in a primary reaction tank. Background Technology

[0002] The production process of reconstituted tobacco requires post-treatment of the discharged wastewater before it can be released or used in other processes. The current wastewater treatment process involves adding polyaluminum ferric sulfate and anions and cations to the primary reaction tank. Through flocculation and sedimentation, the wastewater is removed to remove organic pollutants such as COD and BOD, as well as high concentrations of suspended solids (SS), nitrogen and phosphorus nutrients, and salts.

[0003] The current wastewater treatment process for reclaimed tobacco uses a stirrer in the primary reaction tank to induce a strong charge neutralization reaction between chemicals and colloidal substances in the water. Simultaneously, the hydrolysis products effectively bridge and adsorb suspended solids, producing flocs that flow into a tertiary sedimentation tank. The flocs are then discharged through the sedimentation system and further processed by the sludge conditioning system before entering the sludge dewatering system. However, the reaction between chemicals and wastewater generates a large amount of acidic foam that is difficult to dissipate, polluting the surrounding environment. Furthermore, the flocculent bacterial flocs adhere to the foam, forming scum that is not conducive to sedimentation, thus affecting effluent quality. Additionally, the scum floating on the tertiary sedimentation tank is discharged into the sludge system via a surface scraper. Containing numerous microbubbles, this scum hinders sludge conditioning, affecting the conditioning effect and the operation of dewatering equipment. This results in substandard sludge dryness after dewatering, particularly impacting plate and frame filter presses.

[0004] Therefore, how to pretreat the scum from the primary reaction tank to facilitate the sedimentation of flocs and their mixing with the wastewater treatment plant's integrated sludge for subsequent dewatering has become an urgent problem to be solved. Utility Model Content

[0005] This utility model provides a defoaming treatment device for scum in a primary reaction tank. By installing a pipeline sprayer above the primary reaction tank and using spray wall breaking technology, the device uses high-pressure jetting to break the air bubbles in the scum in the primary reaction tank under the combined action of multiple devices, thus quickly defoaming the scum. This saves both time and space and solves the problems of scum produced in the primary reaction tank being difficult to settle and difficult to press and dehydrate.

[0006] The water storage tank of this utility model adopts a top-feed and bottom-discharge structure, which helps to ensure that the liquid used for defoaming treatment is free of gas. The incoming material is filtered by a Y-type filter to prevent clogging of the pipeline sprayer. The entire device of this utility model can be disassembled for easy replacement and maintenance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A device for defoaming scum in a primary reaction tank includes a water storage tank, a Y-type filter, a booster pump, a connecting pipe, a pipeline sprayer, and a primary reaction tank.

[0009] The water storage tank is equipped with an inlet pipe at the top; a first outlet pipe at the bottom; and a level detector on the side wall of the water storage tank.

[0010] The Y-type filter includes an inlet end and an outlet end; the outlet end of the first outlet pipe is connected to the inlet end of the Y-type filter; the outlet end of the Y-type filter is connected to the inlet end of the booster pump.

[0011] The outlet end of the booster pump is connected to the inlet end of the connecting pipe; the connecting pipe is also equipped with an outlet regulating valve.

[0012] The pipeline sprinkler system includes a sprinkler connection pipe and several rows of sprinkler pipes;

[0013] The outlet end of the connecting pipe is connected to the side wall of the spray connecting pipe, and the inlet end of each spray pipe is connected to the side wall of the spray connecting pipe; the end of each spray pipe is a blind end, and several spray heads are provided on the side wall of each spray pipe, and the spray direction of each spray head is downward.

[0014] The primary reaction tank has an opening at the top; the four rows of spray pipes are all located above the primary reaction tank, and each spray head is located above the primary reaction tank.

[0015] Specifically, the water storage tank is a sealed cylindrical barrel structure, using a top-feed and bottom-discharge method.

[0016] Specifically, the water storage tank is made of corrosion-resistant stainless steel.

[0017] Specifically, the water storage tank is equipped with a drain pipe at the top.

[0018] Specifically, a slag discharge pipe is installed at the bottom of the water storage tank; a slag discharge regulating valve is installed on the slag discharge pipe.

[0019] Specifically, the Y-type filter contains a filter medium used to filter the water effluent from the storage tank.

[0020] Specifically, the Y-type filter is made of transparent material, making it easy to observe the blockage at any time; the Y-type filter is located near the bottom of the water storage tank.

[0021] Specifically, the Y-type filter can be a conventional device in the prior art, such as the SY-type filter, QG-type steam (gas) filter, GB / T14382 YQ-type filter, or a filter of the GL41H flange connection type, GL41W-16P type, or a filter of the PN16 type, DN80 type, etc.

[0022] Specifically, the level detector can be a conventional device in the existing technology, such as the HD-SZY100 intelligent hydrostatic level; the booster pump can be a conventional device in the existing technology, such as the Aired booster pump 15G18-18-0.35, or the Henggeer booster pump with models HSP25-300A or HGE25-480EA; the outlet regulating valve can be a conventional device in the existing technology, such as the TRV30, TRV65, or TRV90 regulating valve. The signal connection method often uses analog signals for control, and common analog signals include standard control signals such as 4-20mA and 0-10mA.

[0023] Specifically, the liquid level detector is a through-type liquid level detector with a tubular structure. The top of the liquid level detector is connected to the upper part of the side wall of the water storage tank, and the bottom of the liquid level detector is connected to the lower part of the side wall of the water storage tank. The liquid level of the water storage tank is detected by the liquid level detector.

[0024] The liquid level detector is equipped with a signal transmitting end, and the booster pump and the outlet regulating valve are both equipped with signal receiving ends. The signal transmitting end of the liquid level detector is connected to the signal receiving ends of the booster pump and the outlet regulating valve. The signal transmitting end of the liquid level detector can send an open or close signal to the signal receiving ends of the booster pump and the outlet regulating valve, and control the opening or closing of the booster pump and the outlet regulating valve, thereby controlling the water output of the water storage tank.

[0025] Specifically, the signal connection between the signal transmitting end of the liquid level detector and the signal receiving end of the booster pump and the outlet regulating valve can be achieved using conventional settings in the existing technology, and is not the point of invention of this utility model, so it will not be described in detail.

[0026] Specifically, during operation, liquid continuously enters through the inlet pipe. The vertical distance between the booster pump and the bottom of the storage tank is 20cm. The level detector is set so that when the distance between the liquid level in the storage tank and the bottom of the tank is greater than or equal to 20cm, the level detector sends a start signal to the booster pump and the outlet regulating valve, activating the booster pump and the outlet regulating valve to control the discharge flow rate at 2m³ / min. 3 / h, maintaining a balance between feed and discharge, this setting can prevent the pump from running dry and burning;

[0027] Then the liquid flowing out of the connecting pipe enters the pipeline sprayer, and the spray head is used to pressurize the sprayed liquid a second time. After the defoamed scum settles in the primary reaction tank, it can be discharged into the next treatment process.

[0028] Specifically, the spray connection pipe and several rows of spray pipes are all set horizontally.

[0029] In a further preferred embodiment, the spray pipes are arranged in four rows, with each row of spray pipes extending horizontally to the left and right, and the spray connecting pipes extending horizontally to the front and back, that is, each row of spray pipes is perpendicular to the spray connecting pipes.

[0030] In a further preferred embodiment, the inlet end of the first row of spray pipes is connected to the front end of the spray connecting pipe, the inlet end of the last row of spray pipes is connected to the rear end of the spray connecting pipe, and the inlet ends of the middle two rows of spray pipes are connected to the side wall of the spray connecting pipe.

[0031] Specifically, the spray head is a straight-line nozzle, ensuring that the sprayed water is in a fan shape and has a certain pressure.

[0032] Furthermore, this invention can also manually open or close the slag discharge regulating valve, so that when the booster pump and the water outlet regulating valve are malfunctioning, the discharge flow rate and the feed flow rate of the water storage tank can be manually adjusted to match the discharge flow rate and maintain a stable liquid level in the water storage tank.

[0033] The beneficial effects of this utility model are:

[0034] 1. The device described in this utility model is used to defoam the scum in the primary reaction tank and can remove suspended solids in the incoming water that is about to enter the connecting pipe and the pipeline sprayer using a Y-type filter.

[0035] 2. This invention uses a booster pump to pressurize the incoming water in the pipeline sprayer. The pressurized water acts on the scum in the primary reaction tank to defoam, which is beneficial for controlling water quality and the dosage of chemicals added during the production of reconstituted tobacco. It also solves the problem of acidic foam pollution caused by wastewater discharge from the primary reaction tank. The defoamed water then enters the post-treatment system, which facilitates sludge sedimentation and reduces suspended solids in the effluent.

[0036] 3. This utility model has the characteristics of simple structure and convenient use. The entire device of this utility model can be disassembled, which is convenient for replacement and maintenance. Attached Figure Description

[0037] Figure 1 This is a front view of the scum defoaming treatment device for the primary reaction tank described in Example 1. Detailed Implementation

[0038] To make the above-mentioned objectives, technical features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many ways other than those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "connected", etc., should be interpreted broadly; those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] Example 1

[0042] like Figure 1 As shown, a scum defoaming treatment device for a primary reaction tank includes a water storage tank 1, a Y-type filter 2, a booster pump 3, a connecting pipe 4, a pipeline sprayer, and a primary reaction tank 6.

[0043] Water storage tank 1 is a sealed cylindrical barrel structure with a diameter of 0.9m, a height of 2m, and a capacity of approximately 5m³. 3 It adopts a top-feed and bottom-discharge method;

[0044] The upper part of the water storage tank 1 is provided with an inlet pipe 11, and the top of the water storage tank 1 is provided with an empty pipe 12; the lower part of the water storage tank 1 is provided with a first outlet pipe 13, and the bottom of the water storage tank 1 is provided with a slag discharge pipe 14; a slag discharge regulating valve 17 is provided on the slag discharge pipe 14.

[0045] A level detector 15 is installed on the side wall of the water storage tank 1;

[0046] The Y-type filter 2 includes an inlet end and an outlet end; the outlet end of the first outlet pipe 13 is connected to the inlet end of the Y-type filter 2; the outlet end of the Y-type filter 2 is connected to the inlet end of the booster pump 3; the Y-type filter 2 is equipped with a filter medium for filtering the water outlet of the water storage tank 1.

[0047] The Y-type filter 2 can be a conventional device in the prior art, such as a SY-type filter, a QG-type steam (gas) filter, or a GB / T14382 YQ-type filter. It can also be a GL41H flange connection type, a GL41W-16P type filter, or a PN16 type, a DN80 type filter, or other types of filters.

[0048] The outlet end of the booster pump 3 is connected to the inlet end of the connecting pipe 4; the connecting pipe 4 is also equipped with a water outlet regulating valve 41.

[0049] The pipeline sprinkler includes a sprinkler connecting pipe 51 and several rows of sprinkler pipes 52, both of which are horizontally arranged. Specifically, in this embodiment, there are four rows of sprinkler pipes 52, each row of which extends horizontally to the left and right, and the sprinkler connecting pipe 51 extends horizontally to the front and back, that is, each row of sprinkler pipes 52 is perpendicular to the sprinkler connecting pipe 51.

[0050] The outlet end of the connecting pipe 4 is connected to the side wall of the spray connecting pipe 51. Specifically, in this embodiment, the inlet end of the first row of spray pipes 52 is connected to the front end of the spray connecting pipe 51, the inlet end of the last row of spray pipes 52 is connected to the rear end of the spray connecting pipe 51, and the inlet ends of the middle two rows of spray pipes 52 are connected to the side wall of the spray connecting pipe 51. The end of each spray pipe 52 is a blind end, and several spray heads 53 are provided on the side wall of each spray pipe 52. The spray direction of each spray head 53 is downward. The spray head 53 adopts a straight nozzle to ensure that the sprayed water is fan-shaped and has a certain pressure. Each spray pipe 52 is 110mm long, and the spray connecting pipe 51 is 30mm long.

[0051] The top of the primary reaction tank 6 is open; the four rows of spray pipes 52 are all located above the primary reaction tank 6, and each spray head 53 is located above the primary reaction tank 6.

[0052] The water storage tank 1 is made of corrosion-resistant stainless steel; the Y-type filter 2 is made of transparent material for easy observation of blockages. The Y-type filter 2 is located near the bottom of the water storage tank 1. The booster pump 3 has a rated speed of 2910 r / min.

[0053] The liquid level detector 15 can be a conventional device in the prior art, such as the HD-SZY100 intelligent hydrostatic level.

[0054] The booster pump 3 can be a conventional device in the existing technology, such as the Aired booster pump 15G18-18-0.35, or the Henggeer booster pump with model HSP25-300A or HGE25-480EA.

[0055] The outlet regulating valve 41 can be a conventional device in the existing technology, such as TRV30, TRV65, or TRV90 type regulating valves. The signal connection method often uses analog signals for control, and common analog signals include standard control signals such as 4-20mA and 0-10mA.

[0056] The liquid level detector 15 is a through-type liquid level detector with a tubular structure. The top end of the liquid level detector 15 is connected to the upper part of the side wall of the water storage tank 1, and the bottom end of the liquid level detector 15 is connected to the lower part of the side wall of the water storage tank 1. This utility model uses the liquid level detector 15 to detect the liquid level of the water storage tank 1. The liquid level detector 15 is provided with a signal transmitting end (not shown in the figure), and the booster pump 3 and the outlet regulating valve 41 are both provided with signal receiving ends (not shown in the figure). The signal transmitting end of the liquid level detector 15 is connected to the signal receiving ends of the booster pump 3 and the outlet regulating valve 41. The signal transmitting end of the liquid level detector 15 can send an open or close signal to the signal receiving ends of the booster pump 3 and the outlet regulating valve 41, and control the opening or closing of the booster pump 3 and the outlet regulating valve 41, thereby controlling the water output of the water storage tank 1.

[0057] Specifically, in this embodiment, the signal connection between the signal transmitting end of the liquid level detector 15 and the signal receiving end of the booster pump 3 and the outlet regulating valve 41 can be achieved using conventional settings in the prior art, and is not the inventive point of this utility model, so it will not be described in detail.

[0058] In this invention, during operation, the inlet pipe 11 continuously supplies liquid. The vertical distance between the booster pump 3 and the bottom of the water storage tank 1 is 20cm. The level detector 15 is set to send a start signal to the booster pump 3 and the outlet regulating valve 41 when the distance between the liquid level in the water storage tank 1 and the bottom of the water storage tank 1 is greater than or equal to 20cm (specifically, 30cm in this embodiment). This activates the booster pump 3 and the outlet regulating valve 41, controlling the discharge flow rate at 2m³ / min. 3 / h, maintaining a balance between feed and discharge, this setting can prevent the pump from running dry and burning;

[0059] Then the liquid flowing out from the connecting pipe 4 enters the pipeline sprayer, and the spray head 53 is used to pressurize the sprayed liquid a second time. After the defoamed scum settles in the primary reaction tank 6, it can be discharged into the next treatment process.

[0060] In addition, this utility model can also manually open or close the slag discharge regulating valve 17, so that when the booster pump 3 and the water outlet regulating valve 41 are working abnormally, the discharge flow rate and the feed flow rate of the water storage tank 1 can be manually adjusted to match the discharge flow rate and maintain the stability of the liquid level in the water storage tank 1.

[0061] The primary reaction tank 6 has a volume of 216 m³. 3 The operating flow rate of primary reaction tank 6 is approximately 1.8 m³ / s. 3 / h, the primary reaction tank 6 will continuously generate foam during use, requiring continuous water spraying.

[0062] The device described in this utility model is used to defoam the scum in the primary reaction tank 6 and can remove suspended solids in the incoming water that is about to enter the connecting pipe 4 and the pipeline sprayer using the Y-type filter 2.

[0063] This invention uses a booster pump 3 to pressurize the incoming water in the pipeline sprayer. The pressurized water acts on the scum in the primary reaction tank 6 to defoam, which is beneficial for controlling water quality and the dosage of chemicals added during the production of reconstituted tobacco. It also solves the problem of acidic foam pollution caused by the discharge of wastewater from the primary reaction tank 6. The defoamed water then enters the post-treatment system, which facilitates sludge sedimentation and reduces suspended solids in the effluent.

[0064] The operating principle of this utility model is as follows:

[0065] Before operation, first close the slag discharge regulating valve 17, the booster pump 3 and the water outlet regulating valve 41, and then introduce the spray water into the water storage tank 1 through the liquid inlet pipe 11. The liquid level in the water storage tank 1 gradually rises.

[0066] The liquid level in the water storage tank 1 is then detected by the liquid level detector 15. The vertical distance between the booster pump 3 and the bottom of the water storage tank 1 is 20cm. When the liquid level is higher than the set value, that is, when the liquid level detector 15 detects that the distance between the liquid level in the water storage tank 1 and the bottom of the water storage tank 1 reaches 30cm, the liquid level detector 15 sends an opening signal to the booster pump 3 and the outlet regulating valve 41, and causes the booster pump 3 and the outlet regulating valve 41 to open. The liquid in the water storage tank 1 passes through the Y-type filter 2, the booster pump 3 and the outlet regulating valve 41 in sequence. The booster pump 3 pressurizes the spray water in the water storage tank 1 and sends it into the pipeline sprayer, then into each spray pipe 52, and sprays it into the primary reaction tank 6 through the spray head 53.

[0067] At the same time, the spray head 53 can be used to pressurize the sprayed liquid a second time. The scum after spraying and defoaming is then settled and enters the next process, which is beneficial for sludge sedimentation and reducing suspended solids in the effluent.

[0068] By manually opening or closing the slag discharge regulating valve 17, the discharge flow rate and feed flow rate of the water storage tank 1 can be manually adjusted when the booster pump 3 and the water outlet regulating valve 41 are malfunctioning, so that the discharge flow rate and feed flow rate are matched and the liquid level in the water storage tank 1 is kept stable.

[0069] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A device for defoaming scum in a primary reaction tank, characterized in that, It includes a water storage tank, a Y-type filter, a booster pump, connecting pipes, a pipeline sprayer, and a primary reaction tank; The water storage tank is equipped with an inlet pipe at the top; a first outlet pipe at the bottom; and a level detector on the side wall of the water storage tank. The Y-type filter includes an inlet end and an outlet end; the outlet end of the first outlet pipe is connected to the inlet end of the Y-type filter; the outlet end of the Y-type filter is connected to the inlet end of the booster pump. The outlet end of the booster pump is connected to the inlet end of the connecting pipe; the connecting pipe is also equipped with an outlet regulating valve. The pipeline sprinkler system includes a sprinkler connection pipe and several rows of sprinkler pipes; The outlet end of the connecting pipe is connected to the side wall of the spray connecting pipe, and the inlet end of each spray pipe is connected to the side wall of the spray connecting pipe; the end of each spray pipe is a blind end, and several spray heads are provided on the side wall of each spray pipe, and the spray direction of each spray head is downward. The primary reaction tank has an opening at the top; all four rows of spray pipes are located above the primary reaction tank, and each spray head is located above the primary reaction tank. The water storage tank is a sealed cylindrical barrel structure, using a top-feed and bottom-discharge method; the top of the water storage tank is equipped with an evacuation pipe; The spray head is a straight-line type.

2. The defoaming treatment device for scum in a primary reaction tank according to claim 1, characterized in that, The bottom of the water storage tank is equipped with a slag discharge pipe; the slag discharge pipe is equipped with a slag discharge regulating valve.

3. The defoaming treatment device for scum in a primary reaction tank according to claim 1, characterized in that, The Y-type filter contains filter media for filtering the water effluent from the storage tank; the Y-type filter is made of transparent material, making it easy to observe any blockages; the Y-type filter is located near the bottom of the storage tank.

4. The defoaming treatment device for scum in a primary reaction tank according to claim 1, characterized in that, The liquid level detector is a through-type liquid level detector with a tubular structure. The top of the liquid level detector is connected to the upper part of the side wall of the water storage tank, and the bottom of the liquid level detector is connected to the lower part of the side wall of the water storage tank. The liquid level detector is used to detect the liquid level in the water storage tank. The liquid level detector is equipped with a signal transmitting end, and the booster pump and the outlet regulating valve are both equipped with signal receiving ends. The signal transmitting end of the liquid level detector is connected to the signal receiving ends of the booster pump and the outlet regulating valve. The signal transmitting end of the liquid level detector can send an open or close signal to the signal receiving ends of the booster pump and the outlet regulating valve, and control the opening or closing of the booster pump and the outlet regulating valve, thereby controlling the water output of the water storage tank.

5. The defoaming treatment device for scum in a primary reaction tank according to claim 1, characterized in that, The spray connection pipe and several rows of spray pipes are all set horizontally.

6. The defoaming treatment device for scum in a primary reaction tank according to claim 5, characterized in that, The spray pipes are arranged in four rows, with each row of spray pipes extending horizontally to the left and right, and the spray connection pipes extending horizontally to the front and back.

7. The defoaming treatment device for scum in a primary reaction tank according to claim 6, characterized in that, The inlet end of the first row of spray pipes is connected to the front end of the spray connecting pipe, the inlet end of the last row of spray pipes is connected to the rear end of the spray connecting pipe, and the inlet ends of the middle two rows of spray pipes are connected to the side wall of the spray connecting pipe.

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