Sewage treatment device for nitrogen and phosphorus removal by efficient biological method

Abstract

The utility model discloses a sewage treatment device for nitrogen and phosphorus removal by an efficient biological method, which comprises a sewage treatment box, a partition plate is arranged in the sewage treatment box and divides the sewage treatment box into an aeration chamber and a settling chamber, an aeration pipe is arranged in the aeration chamber, and a microbial activation device is arranged at the bottom of the aeration chamber. The microorganism activation device comprises a water bath heating box, a gear motor and an auger rod, a sludge inlet and a sludge outlet are formed in the upper end face of the water bath heating box, a motor frame is arranged at the upper end of the sewage treatment box, the gear motor is installed at the upper end of the motor, and the auger rod is fixedly installed at the bottom of the gear motor; and an electric heating wire and a temperature sensor are arranged in the water bath heating box. According to the utility model, the microorganism activation device is arranged in the aeration chamber, and activated sludge is circularly pushed into the water bath heating box through the cooperation of the gear motor and the auger rod for heating and activation, so that the activity of microorganisms in the activated sludge is greatly improved, and the sewage treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment equipment, in particular to a sewage treatment device for efficient biological nitrogen and phosphorus removal. Background Art

[0002] Biological denitrification and phosphorus removal refers to the process of removing nutrients such as nitrogen and phosphorus from sewage by biological treatment. The discharge of sewage containing nitrogen and phosphorus causes excessive growth of algae in the receiving water body and deterioration of water quality. The pollution of raw water by nitrogen and phosphorus increases the difficulty and cost of water treatment. The commonly used treatment method in the existing technology is the activated sludge method.

[0003] The activated sludge process is a wastewater biological treatment technology, and is the main method of wastewater biological treatment based on activated sludge. This technology mixes wastewater with activated sludge (microorganisms) and aerates them to decompose organic pollutants in the wastewater.

[0004] The optimum temperature for nitrate bacteria and nitrite bacteria in activated sludge is 25°C. If the temperature is lower than 5°C, the activity of nitrate bacteria and nitrite bacteria will be greatly reduced, thus affecting the sewage treatment efficiency. The existing technology lacks a heating device, resulting in too low sewage treatment efficiency in winter. Even if some equipment is equipped with a heating device, due to the low thermal conductivity of the sludge, only the sludge close to the heater end can be heated. Moreover, due to the extremely low thermal conductivity of the sludge, the heat of the heated sludge cannot be conducted outward, and the local temperature of the sludge continues to rise, thereby causing the death of microorganisms in the activated sludge. Therefore, a sewage treatment device with high-efficiency biological denitrification and phosphorus removal is needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a sewage treatment device with high efficiency biological nitrogen and phosphorus removal, which has the advantage of high sewage treatment efficiency and solves the problem that the low activity of microorganisms in activated sludge in sewage treatment equipment in the prior art affects the sewage treatment efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sewage treatment device for efficient biological nitrogen and phosphorus removal, comprising a sewage treatment tank, wherein a partition is arranged in the sewage treatment tank, wherein the partition divides the sewage treatment tank into an aeration chamber and a sedimentation chamber, wherein an aeration pipe is arranged in the aeration chamber, and a microorganism activation device is arranged at the bottom of the aeration chamber;

[0007] The microorganism activation device includes a water bath heating box, a reduction motor and an auger rod. The upper end surface of the water bath heating box is provided with a sludge inlet and a sludge outlet. The upper end of the sewage treatment box is provided with a motor frame. The reduction motor is installed at the upper end of the motor. The auger rod is fixed to the bottom of the reduction motor. A heating wire and a temperature sensor are provided in the water bath heating box.

[0008] As a preferred embodiment of the sewage treatment device for efficient biological nitrogen and phosphorus removal of the utility model, the side end surface of the water bath heating box is provided with a water inlet and a water outlet.

[0009] As a preferred sewage treatment device with high efficiency biological denitrification and phosphorus removal of the utility model, the water bath heating box includes a heating plate, a heat exchange plate and a support plate, and the heating plate, heat exchange plate and support plate are all hollow structures. The top of the heat exchange plate is through-connected with the bottom of the support plate, and the bottom of the heat exchange plate is through-connected with the heating plate. The heating wire is installed at the bottom of the heating plate, and the temperature sensor is installed on the side of the heat exchange plate.

[0010] As a preferred embodiment of the sewage treatment device for efficient biological nitrogen and phosphorus removal of the utility model, the heat exchange plates are a plurality of rectangular thin plates.

[0011] As a preferred embodiment of the sewage treatment device for efficient biological nitrogen and phosphorus removal of the utility model, a material guide platform is provided at the lower end of the sludge inlet, and the side surface of the material guide platform is a curved surface structure.

[0012] As a preferred embodiment of the utility model of a high-efficiency biological method for removing nitrogen and phosphorus from sewage treatment equipment, the inner end surface of the sewage treatment tank is provided with a baffle, the baffle is located at the upper end of the sludge outlet, and the side length of the baffle is greater than the side length of the sludge outlet.

[0013] As a preferred embodiment of the sewage treatment device for efficient biological nitrogen and phosphorus removal of the utility model, a PLC controller is arranged on the front end surface of the sewage treatment tank.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model sets a microorganism activation device in the aeration chamber, and pushes the activated sludge into the water bath heating box through the cooperation of the reduction motor and the auger rod for heating and activation, which greatly improves the activity of the microorganisms in the activated sludge, thereby improving the sewage treatment efficiency.

[0016] 2. The utility model greatly increases the contact area between the water bath heating box and the sludge by arranging a heat exchange plate on the water bath heating box, and can stably control the water temperature in the water bath heating box through the cooperation of the temperature sensor and the heating wire, thereby avoiding the inactivation of microorganisms caused by excessive local temperature of the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model from a first viewing angle;

[0018] Figure 2 This is a schematic diagram of the overall structure of the utility model from a second viewing angle;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the activated sludge circulation direction of the utility model.

[0021] In the figure: 1. sewage treatment tank; 101. aeration chamber; 102. sedimentation chamber; 103. aeration pipe; 104. PLC controller; 105. motor frame; 106. partition; 107. baffle; 2. microbial activation device; 201. sludge inlet; 202. sludge outlet; 210. water bath heating box; 211. support plate; 212. heat exchange plate; 213. heating plate; 214. heating wire; 215. temperature sensor; 216. water inlet; 217. drain outlet; 218. material guide table; 220. reduction motor; 230. auger rod. DETAILED DESCRIPTION

[0022] See also Figure 1-Figure 4 A sewage treatment device for efficient biological nitrogen and phosphorus removal comprises a sewage treatment tank 1, a partition 106 is arranged in the sewage treatment tank 1, the partition 106 divides the sewage treatment tank 1 into an aeration chamber 101 and a sedimentation chamber 102, an aeration pipe 103 is arranged in the aeration chamber 101, and a microorganism activation device 2 is arranged at the bottom of the aeration chamber 101;

[0023] The microbial activation device 2 includes a water bath heating box 210, a reduction motor 220 and an auger rod 230. The upper end surface of the water bath heating box 210 is provided with a sludge inlet 201 and a sludge outlet 202. The upper end of the sewage treatment box 1 is provided with a motor frame 105. The reduction motor 220 is installed at the upper end of the motor. The auger rod 230 is fixed to the bottom of the reduction motor 220. A heating wire 214 and a temperature sensor 215 are provided in the water bath heating box 210.

[0024] When the device is in use, sewage is injected into the aeration chamber 101 from the end near the baffle 107, and the sewage is aerated through the aeration pipe 103, so that the microorganisms in the activated sludge at the upper end of the water bath heating box 210 decompose the nitrogen and phosphorus in the sewage. The treated sewage flows into the sedimentation chamber 102 from the upper end of the partition 106 for sedimentation. During the sewage treatment process, the reduction motor 220 and the heating wire 214 are started, and the water in the water bath heating box 210 is heated to the optimal temperature of the microorganisms through the heating wire 214. The reduction motor 220 and the auger rod 230 cooperate to circulate the activated sludge to the outside of the heat exchange plate 212, and the activated sludge is heated and activated, thereby improving the sewage treatment efficiency of the microorganisms in the activated sludge, and the activated sludge circulates in the aeration chamber 101 to avoid the local continuous heating of the activated sludge, which causes the inactivation of the microorganisms in the activated sludge.

[0025] Furthermore, a water inlet 216 and a water outlet 217 are provided on the side end surface of the water bath heating box 210 .

[0026] Water is injected into the water bath heating box 210 through the water inlet 216, so that the electric heating wire 214 heats the water, thereby achieving water bath heating of the sludge. Since water has a large specific heat capacity and its temperature changes slowly, it is convenient to control the heating temperature and avoid direct heating of the sludge by the electric heating wire 214, which would cause the sludge temperature to be too high and the internal microorganisms to be inactivated.

[0027] Furthermore, the water bath heating box 210 includes a heating plate 213, a heat exchange plate 212 and a support plate 211. The heating plate 213, the heat exchange plate 212 and the support plate 211 are all hollow structures. The top of the heat exchange plate 212 is connected to the bottom of the support plate 211, and the bottom of the heat exchange plate 212 is connected to the heating plate 213. The heating wire 214 is installed at the bottom of the heating plate 213, and the temperature sensor 215 is installed on the side of the heat exchange plate 212.

[0028] The heating wire 214 is installed at the bottom of the water bath heating box 210. Since the density of hot water is less than that of cold water, hot water automatically flows upward, so that the water temperature in the water bath heating box 210 can be kept relatively uniform. The temperature sensor 215 monitors the temperature of the heat exchange plate 212 in real time, which facilitates the start and stop of the heating wire 214.

[0029] Furthermore, the heat exchange plates 212 are a plurality of rectangular thin plates.

[0030] The contact area between the activated sludge and the water bath heating box 210 of the heat exchange plate 212 is increased by the heat exchange plate 212, thereby improving the uniformity of heating of the activated sludge and activating the microorganisms in the sludge more fully.

[0031] Furthermore, a material guide platform 218 is provided at the lower end of the sludge inlet 201, and the side surface of the material guide platform 218 is a curved surface structure.

[0032] The sludge is guided toward the heat exchange plate 212 by the guide platform 218 , thereby forcing the sludge to flow toward the sludge outlet 202 .

[0033] Furthermore, a baffle 107 is provided on the inner end surface of the sewage treatment tank 1 . The baffle 107 is located at the upper end of the sludge outlet 202 , and the side length of the baffle 107 is greater than the side length of the sludge outlet 202 .

[0034] The baffle 107 blocks the sludge outlet 202 to prevent the sewage water pressure from being too high and flushing the sludge outlet 202, so that the sludge cannot be discharged from the water bath heating box 210. The baffle 107 can guide the sludge to flow along the upper end of the water bath heating box 210 to the sludge inlet 201, so that the sludge can circulate in the aeration tank. The activated sludge circulates in the aeration chamber 101, which helps to evenly distribute the sludge concentration in the mixed liquid and prevent the local concentration from being too high or too low, thereby ensuring the stable operation of the entire system. The circulating flow can make the activated sludge fully contact with the sewage, ensure the effective degradation and transformation of organic matter by microorganisms, and improve the sewage treatment effect.

[0035] Furthermore, a PLC controller 104 is provided on the front end surface of the sewage treatment tank 1 .

[0036] The temperature of the equipment is controlled by the PLC controller 104, and the sludge circulation speed is adjusted according to the sewage flow, thereby improving the automation level of the equipment.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sewage treatment device for efficient biological nitrogen and phosphorus removal, comprising a sewage treatment tank (1), wherein a partition (106) is arranged in the sewage treatment tank (1), wherein the partition (106) divides the sewage treatment tank (1) into an aeration chamber (101) and a sedimentation chamber (102), wherein an aeration pipe (103) is arranged in the aeration chamber (101), and wherein: A microorganism activation device (2) is provided at the bottom of the aeration chamber (101); The microorganism activation device (2) comprises a water bath heating box (210), a reduction motor (220) and an auger rod (230); the upper end surface of the water bath heating box (210) is provided with a sludge inlet (201) and a sludge outlet (202); the upper end of the sewage treatment box (1) is provided with a motor frame (105); the reduction motor (220) is installed at the upper end of the motor; the auger rod (230) is fixed to the bottom of the reduction motor (220); and the water bath heating box (210) is provided with a heating wire (214) and a temperature sensor (215).

2. A sewage treatment device for efficient biological nitrogen and phosphorus removal according to claim 1, characterized in that: The side end surface of the water bath heating box (210) is provided with a water inlet (216) and a water outlet (217).

3. A sewage treatment device for efficient biological nitrogen and phosphorus removal according to claim 2, characterized in that: The water bath heating box (210) comprises a heating plate (213), a heat exchange plate (212) and a support plate (211); the heating plate (213), the heat exchange plate (212) and the support plate (211) are all hollow structures; the top of the heat exchange plate (212) is connected through the bottom of the support plate (211); the bottom of the heat exchange plate (212) is connected through the heating plate (213); the heating wire (214) is installed at the bottom of the heating plate (213); and the temperature sensor (215) is installed on the side of the heat exchange plate (212).

4. A sewage treatment device for efficient biological nitrogen and phosphorus removal according to claim 3, characterized in that: The heat exchange plates (212) are a plurality of rectangular thin plates.

5. The sewage treatment device for efficient biological nitrogen and phosphorus removal according to claim 1 is characterized in that: A material guide platform (218) is provided at the lower end of the sludge inlet (201), and the side surface of the material guide platform (218) is a curved surface structure.

6. A sewage treatment device for efficient biological nitrogen and phosphorus removal according to claim 2, characterized in that: The inner end surface of the sewage treatment tank (1) is provided with a baffle (107), the baffle (107) is located at the upper end of the sludge outlet (202), and the side length of the baffle (107) is greater than the side length of the sludge outlet (202).

7. The sewage treatment device for efficient biological nitrogen and phosphorus removal according to claim 1 is characterized by: A PLC controller (104) is provided on the front end surface of the sewage treatment tank (1).

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