Low-energy-consumption sewage treatment equipment

Abstract

The utility model relates to low-energy-consumption sewage treatment equipment. The low-energy-consumption sewage treatment equipment comprises a shell, a gas supply device and an electric control device, during use, the first dissolved oxygen detection piece, the second dissolved oxygen detection piece and the third dissolved oxygen detection piece are used for detecting dissolved oxygen content information in the anaerobic tank, the anoxic tank and the aerobic tank in real time respectively; according to the dissolved oxygen content information in the anaerobic tank, the dissolved oxygen content information in the anoxic tank and the dissolved oxygen content information in the aerobic tank, the opening or closing mode of the first aeration device, the second aeration device and the third aeration device is controlled; the dissolved oxygen contents in the anaerobic tank, the anoxic tank and the aerobic tank are respectively and automatically adjusted to a first preset range, a second preset range and a third preset range so as to ensure higher operation efficiency, workers do not need to be arranged for field debugging in the whole process, the debugging and maintenance cost is reduced, the gas supply device does not work all the time, and the working efficiency is improved. The energy consumption of the low-energy-consumption sewage treatment equipment is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field especially, is low energy consumption sewage treatment equipment. BACKGROUND

[0002] The concentration and wastewater quantity of rural domestic wastewater have time limit, and the treatment wastewater load peak fluctuation is unstable, the existing equipment cannot timely regulate and control for this phenomenon, the compressed air produced by the air pump is constant, cannot effectively use in aeration and air stripping, needs long time unceasing operation, and the whole high load operation can waste a lot of manpower and material resources.

[0003] The existing aeration and air stripping system has the property of inertia, and the efficiency cannot be fully utilized, and the unreasonable regulation and control can lead to the equipment being in the starting state all the time, the long time operation of the air pump can increase the air pump loss, and cause the equipment energy consumption to be high. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide a low energy consumption sewage treatment equipment capable of reducing equipment energy consumption, reducing debugging cost and artificial operation and maintenance cost.

[0005] A low energy consumption sewage treatment equipment, comprising a shell, a gas supply device and an electric control device; the inside of the shell has an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank and a clear water tank which are sequentially communicated; a water inlet communicated with the anaerobic tank and a discharge port communicated with the clear water tank are arranged on the side wall of the shell; a first dissolved oxygen detection member and a first aeration device are arranged in the anaerobic tank; a second dissolved oxygen detection member and a second aeration device are arranged in the anoxic tank; a third dissolved oxygen detection member and a third aeration device are arranged in the aerobic tank; the gas supply device is communicated with the first aeration device, the second aeration device and the third aeration device respectively; the electric control device is connected with the first dissolved oxygen detection member, the second dissolved oxygen detection member and the third dissolved oxygen detection member respectively; a first control valve, a second control valve and a third control valve are arranged on the communication passage between the gas supply device and the first aeration device, the communication passage between the gas supply device and the second aeration device and the communication passage between the gas supply device and the third aeration device respectively.

[0006] The electric control device is connected with the first control valve, the second control valve and the third control valve respectively, and is used for controlling the first control valve to open or close according to the dissolved oxygen content information in the anaerobic tank collected by the first dissolved oxygen detection element, controlling the second control valve to open or close according to the dissolved oxygen content information in the anoxic tank collected by the second dissolved oxygen detection element, and controlling the third control valve to open or close according to the dissolved oxygen content information in the aerobic tank collected by the third dissolved oxygen detection element.

[0007] The low-energy-consumption sewage treatment equipment can automatically adjust the dissolved oxygen content in the anaerobic tank to be within the first preset range, the dissolved oxygen content in the anoxic tank to be within the second preset range and the dissolved oxygen content in the aerobic tank to be within the third preset range by controlling the opening or closing of the first control valve, the second control valve and the third control valve, that is, by controlling the opening or closing of the first aeration device, the second aeration device and the third aeration device, so that the operation efficiency is high, the staff need not be arranged to carry out on-site debugging during the whole sewage treatment process, the debugging and operation cost is reduced, and the gas supply device does not work all the time, so that the energy consumption of the low-energy-consumption sewage treatment equipment is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is a structural schematic view of the low-energy-consumption sewage treatment equipment in the preferred embodiment of the utility model;

[0009] Figure 2 It is a structural schematic view of the low-energy-consumption sewage treatment equipment in the preferred embodiment of the utility model; Figure 1 It is a structural schematic view of the third aeration device and part of the nitrification liquid reflux assembly in the aerobic tank of the low-energy-consumption sewage treatment equipment shown in the figure;

[0010] Figure 3 It is a structural schematic view of the low-energy-consumption sewage treatment equipment in the preferred embodiment of the utility model; Figure 1 It is a structural schematic view of the sludge discharge assembly and part of the nitrification liquid reflux assembly in the sedimentation tank of the low-energy-consumption sewage treatment equipment shown in the figure.

[0011] Explanation of reference numerals in the detailed description: 100, low-energy sewage treatment equipment; 110, shell; 111, anaerobic tank; 112, anoxic tank; 113, aerobic tank; 114, sedimentation tank; 115, clear water tank; 116, water inlet; 117, discharge port; 118, first manhole; 119, second manhole; 1101, third manhole; 1102, fourth manhole; 1103, fifth manhole; 120, gas supply device; 130, electric control device; 140, first dissolved oxygen detection member; 141, first high dissolved oxygen meter; 142, first middle dissolved oxygen meter; 143, first low dissolved oxygen meter; 150, first aeration device; 151, first aeration main pipe; 152, first aeration cross pipe; 153, first fixed support; 160, second dissolved oxygen detection member; 161, second high dissolved oxygen meter; 162, second middle dissolved oxygen meter; 163, second low dissolved oxygen meter; 170, second aeration device; 171, second aeration main pipe; 172, second aeration cross pipe; 173, second fixed support; 180, third dissolved oxygen detection member; 181, third high dissolved oxygen meter; 182, third middle dissolved oxygen meter; 183, third low dissolved oxygen meter; 190, third aeration device; 191, third aeration main pipe; 192, third aeration cross pipe; 193, third fixed support; 201, first control valve; 202, second control valve; 203, third control valve; 204, nitrification liquid reflux assembly; 2041, nitrification liquid reflux main pipe; 20411, first reflux port; 20412, second reflux port; 2042, first reflux branch pipe; 20421, vertical sub-pipe; 20422, inclined sub-pipe; 2043, second reflux branch pipe; 2044, first gas lifting pipe; 2045, second gas lifting pipe; 2046, first gas lifting control valve; 2047, second gas lifting control valve; 2048, bottom valve; 205, sludge discharge assembly; 2051, sludge discharge pipe; 20511, discharge vertical pipe; 20512, discharge inclined pipe; 2052, discharge gas lifting pipe; 2053, discharge control valve. DETAILED DESCRIPTION

[0012] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0013] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be understood that the terms "and / or", "at least one of", and "one or more of" as used herein refer to and encompass any one of the items in the list, any combination of two or more of the items in the list, and all combinations of the items in the list.

[0014] In describing a position relationship, unless otherwise defined, when an element is referred to as being "on" another element, it can be directly on the other element or there can be intervening elements. It will also be understood that when an element is referred to as being "between" two elements, it can be the only element between the two elements, or there can be one or more intervening elements.

[0015] In the case of using "include", "have", and "contain" described herein, unless the explicit limiting language such as "only", "consisting of", etc. is used, another component can be added. Unless otherwise mentioned, the singular form of the term can include the plural form, and cannot be understood as one in number.

[0016] The structure of the low-energy sewage treatment equipment in an embodiment of the application is shown. For the convenience of description, the drawing only shows the structure related to the embodiment of the application. Figure 1 The structure of the low-energy sewage treatment equipment in an embodiment of the application is shown. For the convenience of description, the drawing only shows the structure related to the embodiment of the application.

[0017] Please refer to Figure 1 The low-energy sewage treatment equipment 100 in the preferred embodiment of the application comprises a shell 110, a gas supply device 120, and an electric control device 130.

[0018] The inside of the shell 110 has an anaerobic tank 111, an anoxic tank 112, an aerobic tank 113, a sedimentation tank 114, and a clean water tank 115 in sequence. The side wall of the shell 110 is provided with a water inlet 116 communicating with the anaerobic tank 111 and a discharge port 117 communicating with the clean water tank 115. Specifically, the anaerobic tank 111 and the anoxic tank 112 are both filled with anoxic filler (not shown in the drawing), the water inlet 116 communicates with the upper space of the anoxic filler in the anaerobic tank 111, the space below the anoxic filler in the anaerobic tank 111 communicates with the space below the anoxic filler in the anoxic tank 112, and the space above the anoxic filler in the anoxic tank 112 communicates with the aerobic tank 113. Among them, the water inlet 116 is used to input the sewage to be treated into the anaerobic tank 111, and the discharge port 117 is used to discharge the clean water treated by the sewage from the gas.

[0019] The anaerobic tank 111 is provided with a first dissolved oxygen detection member 140 and a first aeration device 150. The anoxic tank 112 is provided with a second dissolved oxygen detection member 160 and a second aeration device 170. The aerobic tank 113 is provided with a third dissolved oxygen detection member 180 and a third aeration device 190. The gas supply device 120 is in communication with the first aeration device 150, the second aeration device 170 and the third aeration device 190 respectively. The first dissolved oxygen detection member 140 is used to collect the dissolved oxygen content information of the liquid in the anaerobic tank 111 in real time, the second dissolved oxygen detection member 160 is used to collect the dissolved oxygen content information of the liquid in the anoxic tank 112 in real time, the third dissolved oxygen detection member 180 is used to collect the dissolved oxygen content information of the liquid in the aerobic tank 113 in real time, and the first aeration device 150, the second aeration device 170 and the third aeration device 190 are used to aerate the liquid in the anaerobic tank 111, the anoxic tank 112 and the aerobic tank 113 respectively, so as to improve the dissolved oxygen content of the liquid in the anaerobic tank 111, the anoxic tank 112 and the aerobic tank 113.

[0020] The electric control device 130 is connected with the first dissolved oxygen detection member 140, the second dissolved oxygen detection member 160 and the third dissolved oxygen detection member 180 respectively. The communication passage between the gas supply device 120 and the first aeration device 150, the communication passage between the gas supply device 120 and the second aeration device 170, and the communication passage between the gas supply device 120 and the third aeration device 190 are respectively provided with a first control valve 201, a second control valve 202 and a third control valve 203. The gas supply device 120 is used to provide compressed gas containing oxygen to the first aeration device 150, the second aeration device 170 and the third aeration device 190 respectively.

[0021] The electric control device 130 is connected with the first control valve 201, the second control valve 202 and the third control valve 203 respectively, and is used to control the first control valve 201 to open or close according to the dissolved oxygen content information of the anaerobic tank 111 collected by the first dissolved oxygen detection member 140, control the second control valve 202 to open or close according to the dissolved oxygen content information of the anoxic tank 112 collected by the second dissolved oxygen detection member 160, and control the third control valve 203 to open or close according to the dissolved oxygen content information of the aerobic tank 113 collected by the third dissolved oxygen detection member 180.

[0022] In use, the low-energy sewage treatment device 100 detects the dissolved oxygen content information in the anaerobic tank 111, the anoxic tank 112 and the aerobic tank 113 in real time through the first dissolved oxygen detection member 140, the second dissolved oxygen detection member 160 and the third dissolved oxygen detection member 180 respectively, and adjusts the dissolved oxygen content in the anaerobic tank 111 to the first preset range, the dissolved oxygen content in the anoxic tank 112 to the second preset range, and the dissolved oxygen content in the aerobic tank 113 to the third preset range by controlling the opening and closing of the first control valve 201, the second control valve 202 and the third control valve 203 according to the dissolved oxygen content information in the anaerobic tank 111, the dissolved oxygen content information in the anoxic tank 112 and the dissolved oxygen content information in the aerobic tank 113, i.e., by controlling the opening and closing of the first aeration device 150, the second aeration device 170 and the third aeration device 190, so as to ensure that the low-energy sewage treatment device 100 has high operation efficiency, and the entire sewage treatment process does not need to arrange staff for on-site debugging, thereby reducing the debugging and operation cost, and the gas supply device 120 also does not work all the time, thereby effectively reducing the energy consumption of the low-energy sewage treatment device 100.

[0023] Therefore, the low-energy sewage treatment device 100 improves the operation and maintenance capability of rural domestic sewage treatment facilities, reduces the treatment energy consumption, improves the operation efficiency, and is simple to operate and maintain, thereby improving the sewage treatment capability.

[0024] Specifically, the first preset range is 0.1 mg / L-0.2 mg / L, the second preset range is 0.2 mg / L-0.5 mg / L, and the third preset range is 2 mg / L-4 mg / L. It is proved by practice that, compared with the traditional sewage treatment device, the low-energy sewage treatment device 100 can reduce the energy consumption by 1 / 3 if the regulation and control are reasonable.

[0025] Please refer to Figure 2 In some embodiments, the low-energy sewage treatment device 100 further comprises a nitrification liquid reflux assembly 204. The nitrification liquid reflux assembly 204 comprises a nitrification liquid reflux main pipe 2041, a first reflux branch pipe 2042 and a second reflux branch pipe 2043. One end of the nitrification liquid reflux main pipe 2041 is located at the top of the sedimentation tank 114, and the other end sequentially passes through the aerobic tank 113 and the anoxic tank 112 and extends to the top of the anaerobic tank 111. One end of the first reflux branch pipe 2042 communicates with the nitrification liquid reflux main pipe 2041, and the other end extends to the bottom of the sedimentation tank 114. One end of the second reflux branch pipe 2043 communicates with the nitrification liquid reflux main pipe 2041, and the other end extends to the bottom of the aerobic tank 113. The nitrification liquid reflux main pipe 2041 is formed with a first reflux port 20411 communicating with the anaerobic tank 111 and a second reflux port 20412 communicating with the anoxic tank 112.

[0026] Thus, in the sewage treatment process, under the power provided by the nitrification liquid reflux pump or other power device, the sludge-water mixture at the bottom of the sedimentation tank 114 and the aerobic tank 113 is respectively refluxed into the nitrification liquid reflux main pipe 2041 through the first reflux branch pipe 2042 and the second reflux branch pipe 2043, and the sludge-water mixture in the nitrification liquid reflux main pipe 2041 is respectively refluxed into the anaerobic tank 111 through the first reflux port 20411 and into the anoxic tank 112 through the second reflux port 20412, so that part of the sludge in the aerobic tank 113 and the sedimentation tank 114 is refluxed into the anaerobic tank 111 and the anoxic tank 112, thereby reducing the sludge treatment amount, adjusting the sludge concentration in the low-energy sewage treatment equipment 100, promoting the reasonable distribution of the sludge age, and facilitating the realization of high-efficiency biological denitrification and phosphorus removal.

[0027] Please refer to Figure 3 Further, in some embodiments, the nitrification liquid reflux assembly 204 includes a first gas lifting pipe 2044, a second gas lifting pipe 2045, a first gas lifting control valve 2046, and a second gas lifting control valve 2047. One end of the first gas lifting pipe 2044 is in communication with the first reflux branch pipe 2042 through a first reducing tee (not shown in the figure), and the other end is in communication with the gas supply device 120 through the first gas lifting control valve 2046. One end of the second gas lifting pipe 2045 is in communication with the second reflux branch pipe 2043 through a second reducing tee (not shown in the figure), and the other end is in communication with the gas supply device 120 through the second gas lifting control valve 2047. Specifically, the reducing end of the first reducing tee is in communication with the end of the first gas lifting pipe 2044 away from the gas supply device 120, and the reducing end of the second reducing tee is in communication with the end of the second gas lifting pipe 2045 away from the gas supply device 120.

[0028] When it is necessary to reflux the excess sludge in the sedimentation tank 114 into the anaerobic tank 111 and the anoxic tank 112, the first gas control valve is opened, at this time the gas supply device 120 inputs compressed gas into the first reflux branch pipe 2042 through the first gas lifting pipe 2044, and then uses the upward force provided by the gas in the first reflux branch pipe 2042 to continuously suck the sludge-water mixture in the sedimentation tank 114 into the first reflux branch pipe 2042 and transport it to the anaerobic tank 111 and the anoxic tank 112 through the nitrification liquid reflux main pipe 2041.

[0029] Similarly, when it is necessary to reflux the excess sludge in the aerobic tank 113 into the anaerobic tank 111 and the anoxic tank 112, the second gas control valve is opened, at this time the gas supply device 120 can input compressed gas into the second reflux branch pipe 2043 through the second gas lifting pipe 2045, and then uses the upward force provided by the gas in the second reflux branch pipe 2043 to continuously suck the sludge-water mixture in the aerobic tank 113 into the second reflux branch pipe 2043 and transport it to the anaerobic tank 111 and the anoxic tank 112 through the nitrification liquid reflux main pipe 2041.

[0030] Thus, the backflow of the sludge-water mixture in the aerobic tank 113 and the sedimentation tank 114 to the anaerobic tank 111 and the anoxic tank 112 is achieved by the air stripping reflux, without the need for additional power devices such as nitrification liquid backflow pumps, thereby further reducing the energy consumption of the low-energy sewage treatment equipment 100.

[0031] Specifically, in actual application, the size of the compressed gas is controlled by the first air stripping control valve 2046 and / or the second air stripping control valve 2047, and then the backflow ratio of the nitrification liquid backflow is adjusted, so as to adjust the nitrification liquid backflow efficiency to the pre-set backflow efficiency.

[0032] Further, in some embodiments, a bottom valve 2048 is arranged at one end of the second backflow branch pipe 2043 away from the nitrification liquid backflow main pipe 2041. Since the bottom end of the aerobic tank 113 is in communication with the bottom end of the sedimentation tank 114, in order to avoid the blockage of the second backflow branch pipe 2043 caused by the liquid flow, the bottom valve 2048 is arranged at one end of the second backflow branch pipe 2043 away from the nitrification liquid backflow main pipe 2041.

[0033] Further, in some embodiments, the first backflow branch pipe 2042 includes a vertical sub-pipe 20421 and an inclined sub-pipe 20422 in communication with one end of the vertical sub-pipe 20421. The end of the vertical sub-pipe 20421 away from the inclined sub-pipe 20422 is in communication with the nitrification liquid backflow main pipe 2041. The inclined sub-pipe 20422 is arranged downwardly inclined relative to the vertical sub-pipe 20421.

[0034] In this way, the first backflow branch pipe 2042 is a bent pipe with the upper end arranged vertically and the lower end arranged obliquely, so that the sludge-water mixture in the sedimentation tank 114 can be more smoothly sucked into the first backflow branch pipe 2042, which is conducive to further reducing the energy consumption.

[0035] In some embodiments, the low-energy sewage treatment equipment 100 further includes a sludge discharge assembly 205, and the sludge discharge assembly 205 includes a sludge discharge pipe 2051. One end of the sludge discharge pipe 2051 extends into the bottom of the sedimentation tank 114, and the other end extends to the outside of the shell 110. During the sewage treatment process, the sludge in the sedimentation tank 114 is discharged through the sludge discharge pipe 2051 by using the power provided by a blowdown pump or other power equipment, so as to avoid the situation that the sludge in the sedimentation tank 114 is full and affects the sewage treatment efficiency.

[0036] Furthermore, in some embodiments, the sludge discharge assembly 205 further includes a discharge gas lift pipe 2052 and a third gas lift control valve. One end of the discharge gas lift pipe 2052 is connected to the sludge discharge pipe 2051 via a third reducing tee (not shown), and the other end is connected to the air supply device 120 via the discharge control valve 2053. Specifically, the reducing end of the third reducing tee is connected to the end of the discharge gas lift pipe 2052 away from the air supply device 120.

[0037] Thus, when sludge needs to be discharged from sedimentation tank 114, the third air-lift control valve is opened to introduce compressed gas supplied by air supply device 120 into the discharge gas pipe. The compressed gas in the discharge gas pipe enters the sludge discharge pipe 2051 through the third reducing tee, providing an upward force to the sludge discharge pipe 2051, thereby drawing the sludge from sedimentation tank 114 into the sludge discharge pipe 2051 and discharging it. Therefore, by using air-lift reflux to provide power for sludge discharge from sedimentation tank 114, no additional power device such as a sewage pump is required, and automatic sludge discharge can be achieved, further reducing the energy consumption of the low-energy wastewater treatment equipment 100.

[0038] Furthermore, in some embodiments, the sludge discharge pipe 2051 includes a discharge riser 20511 and a discharge inclined pipe 20512, one end of which is connected to one end of the discharge riser 20511. One end of the discharge riser 20511 is located inside the sedimentation tank 114, and the other end extends to the outside of the housing 110. The discharge inclined pipe 20512 is located at the bottom of the sedimentation tank 114 and is arranged inclined downward relative to the discharge riser 20511.

[0039] Thus, the sludge discharge pipe 2051 is a bent pipe with a vertical upper end and an inclined lower end, which allows the sludge in the sedimentation tank 114 to be sucked into the sludge discharge pipe 2051 and discharged more smoothly, which is conducive to further reducing the energy consumption of the low-energy wastewater treatment equipment 100.

[0040] In some embodiments, the first dissolved oxygen detector 140 includes a first high-level dissolved oxygen meter 141 located at the top of the anaerobic tank 111, a first medium-level dissolved oxygen meter 142 located in the middle of the anaerobic tank 111, and a first low-level dissolved oxygen meter 143 located at the bottom of the anaerobic tank 111. An electronic control device 130 is connected to the first high-level dissolved oxygen meter 141, the first medium-level dissolved oxygen meter 142, and the first low-level dissolved oxygen meter 143, respectively, and is used to calculate the average of the dissolved oxygen content information collected by the first high-level dissolved oxygen meter 141, the first medium-level dissolved oxygen meter 142, and the first low-level dissolved oxygen meter 143 to obtain the dissolved oxygen content information within the anaerobic tank 111.

[0041] Therefore, the first dissolved oxygen detection device 140 is configured as a first high-level dissolved oxygen meter 141, a first mid-level dissolved oxygen meter 142, and a first low-level dissolved oxygen meter 143 to collect dissolved oxygen content information in the upper, middle, and lower sections of the anaerobic tank 111 in real time. The dissolved oxygen content information in the anaerobic tank 111 is obtained by averaging the dissolved oxygen content information in the upper, middle, and lower sections of the anaerobic tank 111, thereby improving the accuracy of the dissolved oxygen content information collection in the anaerobic tank 111.

[0042] The second dissolved oxygen detection device 160 includes a second high-level dissolved oxygen meter 161 located at the top of the anoxic pool 112, a second mid-level dissolved oxygen meter 162 located in the middle of the anoxic pool 112, and a second low-level dissolved oxygen meter 163 located at the bottom of the anoxic pool 112. An electronic control device 130 is connected to the second high-level dissolved oxygen meter 161, the second mid-level dissolved oxygen meter 162, and the second low-level dissolved oxygen meter 163, respectively, and is used to calculate the average value of the dissolved oxygen content information collected by the second high-level dissolved oxygen meter 161, the second mid-level dissolved oxygen meter 162, and the second low-level dissolved oxygen meter 163 to obtain the dissolved oxygen content information within the anoxic pool 112. The second high-level dissolved oxygen meter 161, the second mid-level dissolved oxygen meter 162, and the second low-level dissolved oxygen meter 163 are respectively used to collect dissolved oxygen content information in the liquid at the top, the liquid in the middle, and the liquid at the bottom of the anoxic pool 112.

[0043] Therefore, the second dissolved oxygen detection device 160 is configured as a second high-level dissolved oxygen meter 161, a second mid-level dissolved oxygen meter 162, and a second low-level dissolved oxygen meter 163 to collect dissolved oxygen content information in the upper, middle, and lower sections of the liquid in the anoxic pool 112 in real time. The dissolved oxygen content information in the anoxic pool 112 is obtained by averaging the dissolved oxygen content information in the upper, middle, and lower sections of the liquid in the anaerobic pool 111, thereby improving the accuracy of the dissolved oxygen content information collection in the anoxic pool 112.

[0044] The third dissolved oxygen detection device 180 includes a third high-level dissolved oxygen meter 181, a third medium-level dissolved oxygen meter 182, and a third low-level dissolved oxygen meter 183 located at the top of the aerobic tank 113. An electronic control device 130 is connected to the third high-level dissolved oxygen meter 181, the third medium-level dissolved oxygen meter 182, and the third low-level dissolved oxygen meter 183, respectively, and is used to calculate the average value of the dissolved oxygen content information collected by the third high-level dissolved oxygen meter 181, the third medium-level dissolved oxygen meter 182, and the third low-level dissolved oxygen meter 183 to obtain the dissolved oxygen content information within the aerobic tank 113.

[0045] Therefore, the third dissolved oxygen detection device 180 is configured as a third high-level dissolved oxygen meter 181, a third mid-level dissolved oxygen meter 182, and a third low-level dissolved oxygen meter 183 to collect dissolved oxygen content information in the upper, middle, and lower sections of the liquid in the aerobic tank 113 in real time. The dissolved oxygen content information in the aerobic tank 113 is obtained by averaging the dissolved oxygen content information in the upper, middle, and lower sections of the liquid in the anaerobic tank 111, thereby improving the accuracy of the dissolved oxygen content information collection in the aerobic tank 113.

[0046] Of course, in other embodiments, the first dissolved oxygen detector 140, the second dissolved oxygen detector 160, and the third dissolved oxygen detector 180 may be a single dissolved oxygen meter or may each be composed of multiple dissolved oxygen meters.

[0047] In some embodiments, the first aeration device 150 includes a first aeration main pipe 171151151, a first aeration horizontal pipe 152 connected to one end of the first aeration main pipe 171151151, and a first fixing bracket 153. The first fixing bracket 153 is fixed to the bottom of the anaerobic tank 111. The first aeration horizontal pipe 152 is mounted on the first fixing bracket 153. A plurality of first aeration holes (not shown) are formed on the side wall of the first aeration horizontal pipe 152. The end of the first aeration main pipe 171151151 away from the first aeration horizontal pipe 152 is connected to the air supply device 120 through a first control valve 201.

[0048] The second aeration device 170 includes a second aeration main pipe 171, a second aeration horizontal pipe 172 connected to both ends of the second aeration main pipe 171, and a second fixed bracket 173. The second fixed bracket 173 is fixed to the bottom end inside the anaerobic tank 111. The second aeration horizontal pipe 172 is mounted on the second fixed bracket 173. A plurality of second aeration holes (not shown) are formed on the side wall of the second aeration horizontal pipe 172. The two ends of the second aeration main pipe 171 away from the second aeration horizontal pipe 172 are connected to the air supply device 120 through a second control valve 202.

[0049] The third aeration device 190 includes a third aeration main pipe 191, a third aeration horizontal pipe 192 connected to the three ends of the third aeration main pipe 191, and a third fixed support 193. The third fixed support 193 is fixed to the bottom of the anaerobic tank 111. The third aeration horizontal pipe 192 is installed on the third fixed support 193. Multiple third aeration holes (not shown) are formed on the side wall of the third aeration horizontal pipe 192. The three ends of the third aeration main pipe 191 away from the third aeration horizontal pipe 192 are connected to the air supply device 120 through a third control valve 203.

[0050] The first aeration horizontal pipe 152, the second aeration horizontal pipe 172, and the third aeration horizontal pipe 192 are suspended and fixed in the anaerobic tank 111, the anoxic tank 112, and the aerobic tank 113 respectively by the first fixed bracket 153, the second fixed bracket 173, and the third fixed bracket 193. This ensures that the compressed gas supplied by the gas supply device 120 to the first aeration main pipe 171, the second aeration main pipe 171, and the third aeration main pipe 191 enters the anaerobic tank 111, the anoxic tank 112, and the aerobic tank 113 through all the first aeration holes of the first aeration horizontal pipe 152, all the second aeration holes of the second aeration horizontal pipe 172, and all the third aeration holes of the third aeration horizontal pipe 192, respectively, thereby realizing the aeration of the liquids in the anaerobic tank 111, the anoxic tank 112, and the aerobic tank 113.

[0051] Furthermore, in some embodiments, there are multiple third aeration main pipes 191 and third control valves 203 in a one-to-one correspondence. One end of each third aeration main pipe 191 is connected to the third aeration horizontal pipe 192, and the other end is connected to the air supply device 120 through the corresponding third control valve 203.

[0052] Generally, compared to the anaerobic tank 111 and the anoxic tank 112, the space in the aerobic tank 113 is larger. Therefore, multiple third aeration main pipes 191 and third control valves 203 are set. During the sewage treatment process, one or more of the multiple third control valves 203 can be opened according to the dissolved oxygen content in the aerobic tank 113 to achieve automatic regulation of the aeration volume in the aerobic tank 113, so as to further reduce the energy consumption of the low-energy sewage treatment equipment 100.

[0053] In some embodiments, the top of the shell 110 is formed with a first maintenance manhole 118 communicating with the anaerobic tank 111, a second maintenance manhole 119 communicating with the anoxic tank 112, a third maintenance manhole 1101 communicating with the aerobic tank 113, a fourth maintenance manhole 1102 communicating with the sedimentation tank 114, and a fifth maintenance manhole 1103 communicating with the clear water tank 115.

[0054] The first dissolved oxygen detector 140 and the first aeration device 150 both pass through the first maintenance manhole 118 and are connected to the electrical control device 130 and the air supply device 120, respectively. The second dissolved oxygen detector 160 and the second aeration device 170 both pass through the second maintenance manhole 119 and are connected to the electrical control device 130 and the air supply device 120, respectively. The third dissolved oxygen detector 180 and the third aeration device 190 both pass through the third maintenance manhole 1101 and are connected to the electrical control device 130 and the air supply device 120, respectively. The first control valve 201, the second control valve 202, and the third control valve 203 are located at the first maintenance manhole 118, the second maintenance manhole 119, and the third maintenance manhole 1101, respectively.

[0055] Thus, the installation of the first inspection manhole 118, the second inspection manhole 119, and the third inspection manhole 1101 not only facilitates the maintenance of the anaerobic tank 111, the anoxic tank 112, and the aerobic tank 113 by the staff, but also eliminates the need for additional openings in the shell 110. This allows for the installation of the first dissolved oxygen detector 140, the first aeration device 150, the second dissolved oxygen detector 160, the second aeration device 170, the third dissolved oxygen detector 180, and the third aeration device 190 on the shell 110, greatly reducing the installation difficulty of the first dissolved oxygen detector 140, the first aeration device 150, the second dissolved oxygen detector 160, the second aeration device 170, the third dissolved oxygen detector 180, the third aeration device 190, the first control valve 201, the second control valve 202, and the third control valve 203.

[0056] Specifically, when there are multiple third aeration main pipes 191 and third control valves 203, there are also multiple third maintenance manholes 1101, each corresponding to one of the multiple third aeration main pipes 191.

[0057] Specifically, when the nitrification liquid return assembly 204 also includes a first air lift pipe 2044, a second air lift pipe 2045, a first air lift control valve 2046, a second air lift control valve 2047, and a sludge discharge assembly 205, the top of the shell 110 also forms a fourth maintenance manhole 1102 that communicates with the sedimentation tank 114. The end of the second air lift pipe 2045 away from the second return branch pipe 2043 and the second air lift control valve 2047 are both located at the third maintenance manhole 1101. One end of the sludge discharge pipe 2051, one end of the third air lift pipe, the third air lift control valve, the end of the first air lift pipe 2044 away from the first return branch pipe 2042, and the first air lift control valve 2046 are all located at the fourth maintenance manhole 1102.

[0058] Of course, in order to facilitate the inspection and maintenance of the clear water tank 115, a fifth inspection manhole 1103 communicating with the clear water tank 115 is formed at the top of the shell 110.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above-described embodiments 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 the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, 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 low-energy wastewater treatment device, characterized in that, The device includes a shell, an air supply device, and an electrical control device. The shell contains, in sequence, an anaerobic tank, an anoxic tank, an aerobic tank, a sedimentation tank, and a clear water tank. The side wall of the shell has an inlet connected to the anaerobic tank and an outlet connected to the clear water tank. The anaerobic tank is equipped with a first dissolved oxygen detector and a first aeration device. The anoxic tank is equipped with a second dissolved oxygen detector and a second aeration device. The aerobic tank is equipped with a third dissolved oxygen detector and a third aeration device. The air supply device is connected to the first, second, and third aeration devices. The electrical control device is connected to the first, second, and third dissolved oxygen detectors. A first control valve, a second control valve, and a third control valve are respectively installed in the communication channels between the air supply device and the first aeration device, between the air supply device and the second aeration device, and between the air supply device and the third aeration device. The electronic control device is connected to the first control valve, the second control valve, and the third control valve respectively, and is used to control the first control valve to open or close according to the dissolved oxygen content information in the anaerobic tank collected by the first dissolved oxygen detector, control the second control valve to open or close according to the dissolved oxygen content information in the anoxic tank collected by the second dissolved oxygen detector, and control the third control valve to open or close according to the dissolved oxygen content information in the aerobic tank collected by the third dissolved oxygen detector.

2. The low-energy wastewater treatment equipment according to claim 1, characterized in that, It also includes a nitrification liquor recirculation assembly; the nitrification liquor recirculation assembly includes a nitrification liquor recirculation main pipe, a first recirculation branch pipe, and a second recirculation branch pipe; one end of the nitrification liquor recirculation main pipe is located at the top of the sedimentation tank, and the other end passes through the aerobic tank and the anoxic tank in sequence and extends to the top of the anaerobic tank; one end of the first recirculation branch pipe is connected to the nitrification liquor recirculation main pipe, and the other end extends to the bottom of the sedimentation tank; one end of the second recirculation branch pipe is connected to the nitrification liquor recirculation main pipe, and the other end extends to the bottom of the aerobic tank; The nitrification liquid return main pipe has a first return port connected to the anaerobic tank and a second return port connected to the anoxic tank.

3. The low-energy wastewater treatment equipment according to claim 2, characterized in that, The nitration liquid reflux assembly includes a first air lift pipe, a second air lift pipe, a first air lift control valve, and a second air lift control valve; one end of the first air lift pipe is connected to the first reflux branch pipe, and the other end is connected to the gas supply device through the first air lift control valve; one end of the second air lift pipe is connected to the second reflux branch pipe, and the other end is connected to the gas supply device through the second air lift control valve.

4. The low-energy wastewater treatment equipment according to claim 2, characterized in that, A foot valve is provided at the end of the second reflux branch pipe away from the nitrated liquor reflux main pipe; and / or The first reflux branch pipe includes a vertical sub-pipe and an inclined sub-pipe with one end connected to one end of the vertical sub-pipe; the end of the vertical sub-pipe away from the inclined sub-pipe is connected to the nitrated liquid reflux main pipe; the inclined sub-pipe is inclined downward relative to the vertical sub-pipe.

5. The low-energy wastewater treatment equipment according to claim 1, characterized in that, It also includes a sludge discharge assembly, which includes a sludge discharge pipe; one end of the sludge discharge pipe extends into the bottom of the sedimentation tank, and the other end extends to the outside of the shell.

6. The low-energy wastewater treatment equipment according to claim 5, characterized in that, The sludge discharge assembly further includes a discharge gas lift pipe and a third gas lift control valve; one end of the discharge gas lift pipe is connected to the sludge discharge pipe, and the other end is connected to the gas supply device through the discharge control valve; and / or The sludge discharge pipe includes a discharge vertical pipe and a discharge inclined pipe with one end connected to one end of the discharge vertical pipe; one end of the discharge vertical pipe is located inside the sedimentation tank, and the other end extends to the outside of the shell; the discharge inclined pipe is located at the bottom of the sedimentation tank and is inclined downward relative to the discharge vertical pipe.

7. The low-energy wastewater treatment equipment according to claim 1, characterized in that, The first dissolved oxygen detection device includes a first high-level dissolved oxygen meter located at the top of the anaerobic tank, a first medium-level dissolved oxygen meter located in the middle of the anaerobic tank, and a first low-level dissolved oxygen meter located at the bottom of the anaerobic tank; the electronic control device is connected to the first high-level dissolved oxygen meter, the first medium-level dissolved oxygen meter, and the first low-level dissolved oxygen meter respectively, and is used to calculate the average value of the dissolved oxygen content information collected by the first high-level dissolved oxygen meter, the first medium-level dissolved oxygen meter, and the first low-level dissolved oxygen meter to obtain the dissolved oxygen content information in the anaerobic tank; The second dissolved oxygen detection device includes a second high-level dissolved oxygen meter located at the top of the anoxic pool, a second medium-level dissolved oxygen meter located in the middle of the anoxic pool, and a second low-level dissolved oxygen meter located at the bottom of the anoxic pool; the electronic control device is connected to the second high-level dissolved oxygen meter, the second medium-level dissolved oxygen meter, and the second low-level dissolved oxygen meter respectively, and is used to calculate the average value of the dissolved oxygen content information collected by the second high-level dissolved oxygen meter, the second medium-level dissolved oxygen meter, and the second low-level dissolved oxygen meter to obtain the dissolved oxygen content information in the anoxic pool; The third dissolved oxygen detection device includes a third high-level dissolved oxygen meter, a third medium-level dissolved oxygen meter, and a third low-level dissolved oxygen meter located at the top of the aerobic tank; the electronic control device is connected to the third high-level dissolved oxygen meter, the third medium-level dissolved oxygen meter, and the third low-level dissolved oxygen meter respectively, and is used to calculate the average value of the dissolved oxygen content information collected by the third high-level dissolved oxygen meter, the third medium-level dissolved oxygen meter, and the third low-level dissolved oxygen meter to obtain the dissolved oxygen content information in the aerobic tank.

8. The low-energy wastewater treatment equipment according to claim 1, characterized in that, The first aeration device includes a first aeration main pipe, a first aeration horizontal pipe connected to one end of the first aeration main pipe, and a first fixed bracket; the first fixed bracket is fixed to the bottom of the anaerobic tank; the first aeration horizontal pipe is installed on the first fixed bracket; a plurality of first aeration holes are formed on the side wall of the first aeration horizontal pipe; the end of the first aeration main pipe away from the first aeration horizontal pipe is connected to the air supply device through the first control valve. The second aeration device includes a second aeration main pipe, a second aeration horizontal pipe connected to both ends of the second aeration main pipe, and a second fixed bracket; the second fixed bracket is fixed to the bottom of the anaerobic tank; the second aeration horizontal pipe is installed on the second fixed bracket; a plurality of second aeration holes are formed on the side wall of the second aeration horizontal pipe; the two ends of the second aeration main pipe away from the second aeration horizontal pipe are connected to the air supply device through the second control valve; The third aeration device includes a third aeration main pipe, a third aeration horizontal pipe connected to the three ends of the third aeration main pipe, and a third fixed support; the third fixed support is fixed to the bottom of the anaerobic tank; the third aeration horizontal pipe is installed on the third fixed support; a plurality of third aeration holes are formed on the side wall of the third aeration horizontal pipe; the three ends of the third aeration main pipe away from the third aeration horizontal pipe are connected to the air supply device through the third control valve.

9. The low-energy wastewater treatment equipment according to claim 8, characterized in that, The third aeration main pipe and the third control valve are a plurality of one-to-one correspondences; one end of each third aeration main pipe is connected to the third aeration horizontal pipe, and the other end is connected to the air supply device through the corresponding third control valve.

10. The low-energy wastewater treatment equipment according to claim 1, characterized in that, The top of the shell has a first maintenance manhole connected to the anaerobic tank, a second maintenance manhole connected to the anoxic tank, a third maintenance manhole connected to the aerobic tank, a fourth maintenance manhole connected to the sedimentation tank, and a fifth maintenance manhole connected to the clear water tank. The first dissolved oxygen detector and the first aeration device both pass through the first maintenance manhole and are connected to the electrical control device and the air supply device, respectively; the second dissolved oxygen detector and the second aeration device both pass through the second maintenance manhole and are connected to the electrical control device and the air supply device, respectively; the third dissolved oxygen detector and the third aeration device both pass through the third maintenance manhole and are connected to the electrical control device and the air supply device, respectively; the first control valve, the second control valve, and the third control valve are located at the first maintenance manhole, the second maintenance manhole, and the third maintenance manhole, respectively.

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