CN108975496B - Anaerobic tank heating system and rapid and stable heating method - Google Patents
Anaerobic tank heating system and rapid and stable heating method Download PDFInfo
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- CN108975496B CN108975496B CN201810897439.7A CN201810897439A CN108975496B CN 108975496 B CN108975496 B CN 108975496B CN 201810897439 A CN201810897439 A CN 201810897439A CN 108975496 B CN108975496 B CN 108975496B
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention relates to an anaerobic tank heating system which comprises an anaerobic tank body, an external hot water source, a water inlet pipe, a heating pipeline and a water outlet pipe, wherein the heating pipeline is arranged inside the anaerobic tank body, two ends of the heating pipeline are respectively connected with the water inlet pipe and the water outlet pipe, the water inlet pipe and the water outlet pipe respectively penetrate out of the anaerobic tank body, the peripheries of the outer walls of the water inlet pipe and the water outlet pipe are hermetically connected with the anaerobic tank body, and one end of the water inlet pipe, far away from the anaerobic tank body, is connected with the external hot water source. The residual hot water is continuously conveyed to the heating pipeline in the anaerobic tank body, so that the waste water in the anaerobic tank body and the hot water flowing in the heating pipeline complete heat exchange, the temperature of the waste water in the anaerobic tank can be stably and rapidly increased to 30-38 ℃ from the temperature lower than 20 ℃, and the time is shortened by 70-90% compared with the old heating mode; can quickly recover the sludge activity of anaerobic bacteria, recover the wastewater treatment capacity of the anaerobic tank and ensure the stable operation of production.
Description
Technical Field
The invention relates to the technical field of sewage treatment anaerobic tank equipment, in particular to an anaerobic tank heating system and a rapid and stable heating method.
Background
With the severe environmental protection form in China, the industrial wastewater treatment is more and more concerned by the society. Particularly, in winter, the temperature is reduced, and the anaerobic system can be opened and stopped at any time. In the past, when the anaerobic tank is stopped and restarted in winter, the temperature is limited, and the temperature in the anaerobic tank needs to be gradually increased by external heating so as to recover the activity of anaerobic bacteria. When the temperature is heated externally, the temperature is increased unevenly and slowly; therefore, the anaerobic start-up time is prolonged, the production operation is influenced, and the treatment capacity and the treatment effect are limited.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an anaerobic tank heating system and method which can rapidly and stably heat and ensure stable production operation.
Therefore, the adopted technical scheme is that the anaerobic tank heating system comprises an anaerobic tank body, an external hot water source, a water inlet pipe, a heating pipeline and a water outlet pipe, wherein the heating pipeline is arranged inside the anaerobic tank body, two ends of the heating pipeline are respectively connected with the water inlet pipe and the water outlet pipe, the water inlet pipe and the water outlet pipe respectively penetrate out of the anaerobic tank body, the peripheries of the outer walls of the water inlet pipe and the water outlet pipe are hermetically connected with the anaerobic tank body, and one end, far away from the anaerobic tank body, of the water inlet pipe is connected with the external hot water source.
Preferably, a first valve is arranged on the water inlet pipe, a second valve is arranged on the water outlet pipe, the first valve and the second valve are both arranged outside the anaerobic tank body, and the first valve is located between the anaerobic tank body and the external hot water source.
Preferably, the water inlet pipe, the heating pipeline and the water outlet pipe are arranged in the horizontal direction, the heating pipeline comprises a straight pipeline and an arc pipeline, two ends of the straight pipeline are respectively connected with the arc pipeline, and the fluid flow direction of the heating pipeline is distributed in the cross section inner cavity of the anaerobic tank body in the S horizontal direction.
Preferably, the water inlet pipes, the heating pipelines and the water outlet pipes are arranged in a plurality of groups and are arranged at intervals up and down, the water inlet pipes are connected in parallel to form a total water inlet pipe, and the total water inlet pipe is connected with the external hot water source; and the water outlet pipes are connected in parallel to form a total water outlet pipe.
Preferably, a support is arranged on a bottom plate of the anaerobic tank body, and one end, far away from the bottom plate, of the support is connected with the linear pipe.
Preferably, the water inlet pipe, the heating pipeline and the water outlet pipe are all made of stainless steel pipes, welding seams are all argon arc welding bottoming and electric welding covering welding methods, and a pressing test is carried out.
Preferably, the support is a telescopic rod and comprises an inner rod and an outer rod, one end of the inner rod is connected with the bottom plate, the other end of the inner rod, which is far away from the bottom plate, is embedded into the outer rod, the other end of the outer rod, which is far away from the inner rod, is provided with a support plate, and the support plate is connected with the linear pipe; the anaerobic tank is characterized in that a cover plate is arranged at the top end of the anaerobic tank body, a motor is arranged on the outer side of the cover plate, the motor is arranged in the center of the cover plate, a rotating shaft is connected onto an output shaft of the motor, an external thread is arranged at one end, away from the motor, of the rotating shaft, a first sleeve is arranged on the supporting plate, the first sleeve is vertically upward and is in penetrating connection with the supporting plate, a cavity is formed in the first sleeve, a nut is arranged at the top end of the first sleeve, a blocking cover is arranged at the bottom end of the first sleeve, an internal thread is arranged on the nut, and the internal thread; a second sleeve is connected to one end, close to the cover plate, of the rotating shaft, a cavity is formed inside the second sleeve, an end cover is arranged at the top end of the second sleeve, the rotating shaft penetrates through the end cover downwards and is fixedly connected with the end cover, the top end of the first sleeve is embedded into the second sleeve, the rotating shaft is screwed on the nut and extends into the first sleeve, and a sealing ring is arranged at the bottom end of the second sleeve; the outer wall of the second sleeve is provided with blades which are uniformly distributed on the circumference and staggered at intervals from top to bottom.
Preferably, the backup pad includes first backup pad and second backup pad, first backup pad with the second backup pad interval sets up in turn from top to bottom, be equipped with the first slot hole of a plurality of in the first backup pad, be equipped with a plurality of second slot hole in the second backup pad, the axis of first slot hole with the axis mutually perpendicular of second slot hole.
Preferably, the anaerobic tank heating system further comprises a processor and a temperature sensor, the temperature sensor is connected with the processor, the first valve and the second valve are both set as electromagnetic valves, the processor is respectively connected with the first valve and the second valve, and the processor is connected with the motor; the temperature sensor is arranged in the anaerobic tank body and used for acquiring the temperature of wastewater in the anaerobic tank body and sending the numerical value of the temperature to the processor, and the processor sends an opening or closing signal to the first valve and the second valve; the processor sends a signal to the motor to start or stop.
A rapid and stable heating method adopting an anaerobic tank heating system comprises the following steps:
step 1: the anaerobic tank is characterized in that a heating pipeline is arranged inside the anaerobic tank body, two ends of the heating pipeline are respectively connected with a water inlet pipe and a water outlet pipe, the water inlet pipe and the water outlet pipe penetrate out of the anaerobic tank body, the peripheries of the outer walls of the water inlet pipe and the water outlet pipe are connected with the anaerobic tank body in a welding and sealing mode, and the water inlet pipe is connected with an external hot water source through an external pipeline;
step 2: the external pipeline is additionally provided with a hot water delivery pump, the external hot water source adopts hot water with the residual production temperature of more than or equal to 30 ℃ and less than or equal to 80 ℃, and the hot water of the external hot water source is continuously input into the heating pipeline through the hot water delivery pump and realizes direct heat and cold exchange with the wastewater in the anaerobic tank body.
Preferably, the method for rapidly and smoothly heating by using the anaerobic tank heating system further comprises the following steps:
and step 3: all the first valves are numbered as Y1, Y2, Y3 and Y4 from bottom to top in sequence; numbering all the second valves from bottom to top as R1, R2, R3 and R4 in sequence, and presetting the numbering of the first valve and the second valve in a processor;
and 4, step 4: a temperature sensor in the anaerobic tank body monitors the temperature of the wastewater in the anaerobic tank body in real time and sends the temperature value to a processor, when the sent value is lower than a set first threshold value, all first valves and all second valves are opened, and hot water with the residual production temperature of more than or equal to 30 ℃ and less than or equal to 80 ℃ is continuously introduced into a plurality of groups of heating pipelines;
and 5: when the value sent by the temperature sensor to the processor reaches a set second threshold value, the processor sends signals for turning off Y2 and Y4, and simultaneously sends signals for turning off R2 and R4;
step 6: when the value sent by the temperature sensor to the processor reaches a set third threshold, the processor sends signals to turn off Y1 and Y3, while the processor sends signals to turn off R1 and R3.
The technical scheme of the invention has the following advantages:
1. according to the anaerobic tank heating system and method provided by the invention, the residual hot water produced is continuously conveyed to the heating pipeline in the anaerobic tank body, so that the waste water in the anaerobic tank body and the hot water flowing in the heating pipeline complete heat exchange, the temperature of the waste water in the anaerobic tank can be stably and rapidly increased to 30-38 ℃ from the temperature lower than 20 ℃, and the time is shortened by 70-90% compared with the old heating mode; can quickly recover the sludge activity of anaerobic bacteria, recover the wastewater treatment capacity of the anaerobic tank and ensure the stable operation of production.
2. According to the anaerobic tank heating system and method provided by the invention, the temperature of the wastewater in the anaerobic tank is monitored and the temperature of the wastewater in the anaerobic tank is automatically controlled, so that the temperature of the wastewater in the anaerobic tank can be rapidly and stably increased, and the requirement of normal starting and running of the anaerobic tank is met; and the temperature of the wastewater in the anaerobic tank can be stably maintained at 30-38 ℃, an environment suitable for the anaerobic bacteria to live is provided, the anaerobic bacteria can efficiently finish the purpose of decomposing the wastewater, and meanwhile, the energy is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a front view of an anaerobic tank warming system provided by the present invention;
FIG. 2 is a cross-sectional view of the anaerobic tank warming system shown in FIG. 1 (with the warming line in a lowered position);
FIG. 3 is a cross-sectional view of the anaerobic tank warming system shown in FIG. 1 (with the warming line in a high position);
FIG. 4 is a cross-sectional view A-A of FIG. 2;
FIG. 5 is a cross-sectional view B-B shown in FIG. 2;
FIG. 6 is an electrical schematic;
11-an anaerobic tank body; 12-an external hot water source; 13-water inlet pipe; 14-a heating line; 141-a straight line tube; 142-arc tube; 15-water outlet pipe; 16-a first valve; 17-a second valve; 18-total water inlet pipe; 19-total water outlet pipe; 20-a base plate; 21-a scaffold; 22-a temperature sensor; 23-a water distribution system; 24-a support plate; 25-hot water delivery pump; 26-a cover plate; 27-a motor; 28-axis of rotation; 29-a first sleeve; 30-a nut; 31-a blocking cover; 32-a second sleeve; 33-end caps; 34-a sealing ring; 35-a blade; 36-a first slot; 37-second slot;
211-an inner rod; 212-outer rod; 241-a first support plate; 242 — second support plate.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An anaerobic tank heating system is shown in fig. 1-5, and comprises an anaerobic tank body 11, an external hot water source 12, a water inlet pipe 13, a heating pipeline 14 and a water outlet pipe 15, wherein the heating pipeline 14 is arranged inside the anaerobic tank body 11, two ends of the heating pipeline 14 are respectively connected with the water inlet pipe 13 and the water outlet pipe 15, the water inlet pipe 13 and the water outlet pipe 15 respectively penetrate out of the anaerobic tank body 11, the peripheries of the outer walls of the water inlet pipe 13 and the water outlet pipe 15 are hermetically connected with the anaerobic tank body 11, and one end of the water inlet pipe 13, which is far away from the anaerobic tank body 11, is connected with the external hot water source 12. In winter, the temperature of the wastewater in the anaerobic tank body 11 is possibly lower than 20 ℃, because the sludge activity of anaerobic bacteria cannot be activated due to low temperature, the external hot water source 12 is hot water which is used for producing residual water and has the temperature of more than or equal to 30 ℃ and less than or equal to 80 ℃, the hot water is conveyed to the water inlet pipe 13 through a pipeline, and the external pipeline is provided with a hot water conveying pump 25, so that the hot water can be continuously conveyed to the heating pipeline 14 in the anaerobic tank body 11, the heat exchange between the wastewater in the anaerobic tank body 11 and the hot water flowing in the heating pipeline 14 is completed, the temperature of the wastewater in the anaerobic tank body can be stably and rapidly increased to 30-38 ℃ from the temperature lower than 20 ℃, and the time is shortened by 70-90% compared with; can quickly recover the sludge activity of anaerobic bacteria, recover the wastewater treatment capacity of the anaerobic tank and ensure the stable operation of production.
The water inlet pipe 13 is provided with a first valve 16, the water outlet pipe 15 is provided with a second valve 17, the first valve 16 and the second valve 17 are both arranged outside the anaerobic tank body 11, and the first valve 16 is positioned between the anaerobic tank body 11 and the external hot water source 12. The first valve 16 and the second valve 17 can be selected from manually controlled stop valves to regulate the flow of the influent water so as to control the temperature of the wastewater in the anaerobic tank.
The water inlet pipe 13, the heating pipeline 14 and the water outlet pipe 15 are all arranged in a horizontal direction, the heating pipeline 14 comprises a straight pipe 141 and an arc pipe 142, two ends of the straight pipe 141 are respectively connected with the arc pipe 142, the flow direction of fluid of the heating pipeline 14 is in an S horizontal direction, and the heating pipeline 14 is fully distributed in the inner cavity of the cross section of the anaerobic tank body 11. The heating pipeline 14 can be arranged 20-50cm above the water distribution system, so that waste water in the anaerobic tank can perform better heat exchange with the heating pipeline 14, the linear pipes 141 can be arranged in a plurality of parallel and spaced ways, two ends of the linear pipes 141 are respectively welded with the arc pipes 142, and the arc pipes 142 can be arranged in a streamline manner to reduce the flowing resistance of the hot water, so that the heat dissipation area of the heating pipeline 14 is increased, and the waste water in the anaerobic tank can be rapidly and stably heated.
In order to improve the heat exchange efficiency in the anaerobic tank, the preferable scheme is that the water inlet pipes 13, the heating pipelines 14 and the water outlet pipes 15 are arranged into a plurality of groups and are arranged at intervals up and down, a plurality of water inlet pipes 13 are connected in parallel to form a main water inlet pipe 18, and the main water inlet pipe 18 is connected with the external hot water source 12; and a plurality of water outlet pipes 15 are connected in parallel to form a total water outlet pipe 19. According to the treatment capacity and the sectional area of the anaerobic tank, a plurality of groups of water inlet pipes 13, heating pipelines 14 and water outlet pipes 15 can be designed in the anaerobic tank, every two groups of heating pipelines 14 can be arranged in parallel, the linear pipe 141 of the upper group of heating pipelines 14 can be arranged at the center of the circular pipe 142 of the lower group of heating pipelines 14, so that the heat exchange between the wastewater in the anaerobic tank and the heating pipelines 14 is facilitated, and a first valve 16 and a second valve 17 can be arranged on each group of water inlet pipes 13 and water outlet pipes 15 so as to conveniently control the water inflow of hot water; the ratio of the heat exchange area to the cross-sectional area of the anaerobic tank is generally set to 1:5, preferably 2:3, the heating pipelines 14 are arranged in four groups from top to bottom, and the heat exchange area is enlarged in an up-and-down overlapping mode, so that the temperature of the wastewater in the anaerobic tank can be rapidly and stably increased.
In order to ensure the normal operation of the heat exchange system, it is preferable that the anaerobic tank 11 includes a bottom plate 20, a support 21 is disposed on the bottom plate 20, and one end of the support 21, which is far away from the bottom plate 20, is connected to the linear pipe 141. The support 21 can be arranged on two sides, the support 21 can be provided with the support plate 24, the support plate 24 can be provided with the pipe clamp fixing straight pipe 141, or the straight pipe 141 can be directly welded and fixed on the support plate 24, the support plate 24 can be uniformly arranged at a certain interval from top to bottom, so that the heating pipeline 14 can be uniformly arranged at an interval from top to bottom, and the heating pipeline 14 is arranged 20-50cm above the water distribution system in a layer-by-layer erecting mode, so that the heating pipeline 14 can be prevented from deforming due to loose support, heat exchange between the heating pipeline 14 and waste water in the anaerobic tank is facilitated, and the waste water in the anaerobic tank can be rapidly and stably heated.
The waste water in the anaerobic tank is corrosive, and in order to prolong the service life and ensure the tightness of all welded junctions, the preferable scheme is that the water inlet pipe 13, the heating pipeline 14 and the water outlet pipe 15 are all made of stainless steel pipes, welding seams are all argon arc welding bottoming and electric welding covering welding methods, and a pressing test is carried out. When the straight line pipe 141 and the arc pipe 142 are butt welded, a groove is formed on the end surface firstly to ensure that the end surfaces of the straight line pipe 141 and the arc pipe 142 are well contacted, then tungsten wires are adopted for argon arc welding fusion, and after the argon arc welding is completed, the electric welding is adopted for covering and welding for one circle, so that the tightness and the firmness of a welded junction can be ensured; then introducing 1MPa of air pressure for maintaining the pressure for 10 minutes, coating soapy water to check whether bubbles appear in each welding line, and accordingly checking whether each welding line leaks or not; because the water inlet pipe 13, the heating pipeline 14 and the water outlet pipe 15 can be made of stainless steel pipes, the water heating system is corrosion-resistant, and the service life of the heating system is prolonged.
The support 21 is an expansion link, the support 21 comprises an inner rod 211 and an outer rod 212, one end of the inner rod 211 is connected with the bottom plate 20, the other end, far away from the bottom plate 20, of the inner rod 211 is embedded into the outer rod 212, the other end, far away from the inner rod 211, of the outer rod 212 is provided with a support plate 24, and the support plate 24 is connected with the linear tube 141; a cover plate 26 is arranged at the top end of the anaerobic tank body 11, a motor 27 is arranged on the outer side of the cover plate 26, the motor 27 is arranged at the center of the cover plate 26, a rotating shaft 28 is connected to an output shaft of the motor 27, an external thread is arranged at one end, far away from the motor 27, of the rotating shaft 28, a first sleeve 29 is arranged on the support plate 24, the first sleeve 29 is vertically upward and is in penetrating connection with the support plate 24, a cavity is formed in the first sleeve 29, a nut 30 is arranged at the top end of the first sleeve 29, a blocking cover 31 is arranged at the bottom end of the first sleeve 29, an internal thread is arranged on the nut 30, and the internal thread is matched with the external thread; a second sleeve 32 is connected to one end of the rotating shaft 28 close to the cover plate 26, a cavity is formed inside the second sleeve 32, an end cover 33 is arranged at the top end of the second sleeve 32, the rotating shaft 28 downwardly penetrates through the end cover 33 and is fixedly connected with the end cover 33, the top end of the first sleeve 29 is embedded into the second sleeve 32, the rotating shaft 28 is screwed on the nut 30, the rotating shaft 28 extends into the first sleeve 29, and a sealing ring 34 is arranged at the bottom end of the second sleeve 32; the outer wall of the second sleeve 32 is provided with blades 35, and the blades 35 are uniformly distributed on the circumference and staggered up and down at intervals. The motor 27 is started in the positive direction to drive the rotating shaft 28 to rotate, the external thread on the rotating shaft 28 is matched with the internal thread of the nut 30, and the outer rod 212 can slide up and down along the inner rod 211 due to the nesting of the inner rod 211 and the outer rod 212, so that the nut 30, the first sleeve 29 and the supporting plate 24 ascend together under the sliding guide effect of the inner rod 211; when the motor 27 is started reversely, the rotating shaft 28 is driven to rotate, and the nut 30, the first sleeve 29 and the supporting plate 24 descend together, so that the heating pipeline 14 heats the bottom of the anaerobic tank body 11, and simultaneously, the waste water in the anaerobic tank body 11 is stirred while the supporting plate 24 and the heating pipeline 14 ascend and descend together; rotation axis 28 rotates, drives blade 35 forward or reverse rotation simultaneously, stirs the waste water of the inside of the anaerobic tank body 11 simultaneously, has promoted heat exchange efficiency like this, can shorten the heat-up time greatly, enables the waste water temperature in the anaerobic tank and stabilizes rapid heating up, has promoted the ability that the anaerobic tank handled waste water, ensures the steady operation of production. A flexible hose can be connected between the water inlet pipe 13 and the heating pipeline 14, and a flexible hose can be connected between the water outlet pipe 15 and the heating pipeline 14, so that the heating pipeline 14 can be conveniently lifted and lowered, and a plurality of water inlet pipes 13 and water outlet pipes 15 can be staggered along the transverse direction of the anaerobic tank body 11 in order to facilitate the simultaneous up-and-down lifting of the upper and lower layers of heating pipelines 14; the sealing ring 34 can be arranged at the bottom end of the second sleeve 32, so that wastewater can be prevented from entering the first sleeve 29, and the corrosion to the threads can be easily caused for a long time, so that the service performance of the equipment is influenced; further, the tip of the outer rod 212 may be opened.
The support plate 24 includes a first support plate 241 and a second support plate 242, the first support plate 241 and the second support plate 242 are alternately arranged at intervals from top to bottom, the first support plate 241 is provided with a plurality of first long holes 36, the second support plate 242 is provided with a plurality of second long holes 37, and the axis of the first long holes 36 is perpendicular to the axis of the second long holes 37. When the supporting plate 24 is lifted up and down, the wastewater in the anaerobic tank body 11 can be uniformly mixed through the alternate change of the first long hole 36 and the second long hole 37, so that the aim of quickly heating is fulfilled; the first support plate 241 and the second support plate 242 may also be provided with a plurality of small holes.
As shown in fig. 6, the anaerobic tank warming system further includes a processor, a display screen, and a temperature sensor 22, the temperature sensor 22 is connected with the processor, the processor is connected with the display screen, the first valve 16 and the second valve 17 are both provided as electromagnetic valves, the processor is respectively connected with the first valve 16 and the second valve 17, and the processor is connected with the motor 27; the temperature sensor 22 is installed in the anaerobic tank 11, the temperature sensor 22 is used for acquiring the temperature of the wastewater in the anaerobic tank 11 and sending the temperature value to the processor, and the processor sends an opening or closing signal to the first valve 16 and the second valve 17; the processor sends a signal to the motor 27 to start or stop. In winter, the temperature of the wastewater in the anaerobic tank body 11 is low, and the temperature sensor 22 sends the detected numerical value of the wastewater temperature to the processor and displays the numerical value on the display screen for an operator to observe; when the value sent by the temperature sensor 22 is lower than a set first threshold value, namely the first threshold value is set as 20 ℃, the processor sends an opening signal to the first valve 16 and the second valve 17, the first valve 16 and the second valve 17 are opened, the hot water delivery pump is started, the produced residual hot water can be continuously delivered to the heating pipeline 14 in the anaerobic tank body 11, meanwhile, the processor sends a starting signal to the motor 27, the motor 27 rotates forwards for a certain time at a certain speed and then rotates backwards for a certain time, and then the operation is alternated, so that the heat exchange between the waste water in the anaerobic tank body 11 and the hot water flowing in the heating pipeline 14 is completed, and the temperature of the waste water in the anaerobic tank can quickly and stably rise; when the value sent by the temperature sensor 22 reaches the set second threshold value, namely the second threshold value is set to be 30 ℃, the requirement of normal starting operation of the anaerobic tank is met.
A rapid and stable heating method adopting an anaerobic tank heating system comprises the following steps:
step 1: a heating pipeline 14 is arranged inside the anaerobic tank body 11, two ends of the heating pipeline 14 are respectively connected with a water inlet pipe 13 and a water outlet pipe 15, the water inlet pipe 13 and the water outlet pipe 15 penetrate out of the anaerobic tank body 11, the peripheries of the outer walls of the water inlet pipe 13 and the water outlet pipe 15 are connected with the anaerobic tank body 11 in a welding and sealing mode, and the water inlet pipe 13 is connected with an external hot water source 12 through an external pipeline;
step 2: the external pipeline is additionally provided with a hot water delivery pump, the external hot water source 12 adopts hot water with the residual production temperature of more than or equal to 30 ℃ and less than or equal to 80 ℃, and the hot water of the external hot water source 12 is continuously input into the heating pipeline 14 through the hot water delivery pump to realize direct heat and cold exchange with the wastewater in the anaerobic tank body 11.
A rapid and stable heating method adopting an anaerobic tank heating system further comprises the following steps:
and step 3: all the first valves 16 are numbered as Y1, Y2, Y3 and Y4 from bottom to top in sequence; all the second valves 17 are numbered as R1, R2, R3 and R4 from bottom to top, and the numbers of the first valve 16 and the second valve 17 are preset in the processor.
And 4, step 4: the temperature sensor 22 in the anaerobic tank body 11 monitors the temperature of the wastewater in the anaerobic tank body 11 in real time and sends the temperature value to the processor, when the sent value is lower than a set first threshold value, all the first valves 16 and the second valves 17 are opened, and hot water with the production residual temperature of more than or equal to 30 ℃ and less than or equal to 80 ℃ is continuously introduced into the plurality of groups of heating pipelines 14; namely, the first threshold is set to be 20 ℃, when the temperature sensor 22 detects that the temperature of the wastewater in the anaerobic tank 11 is lower than 20 ℃, all the first valves 16 and the second valves 17 are opened, all the heating pipelines 14 are continuously introduced with hot water, and meanwhile, the processor sends a signal for starting the motor 27, so that the motor 27 is electrified to rotate, and the wastewater in the anaerobic tank 11 is stirred and mixed uniformly, so as to ensure that the temperature of the wastewater in the anaerobic tank rises rapidly and stably.
And 5: the temperature sensor 22 in the anaerobic tank body 11 monitors the temperature of the wastewater in the anaerobic tank body 11 in real time and sends the temperature value to the processor, when the sent value reaches a set second threshold value, the processor sends signals for closing Y2 and Y4, and simultaneously the processor sends signals for closing R2 and R4, so that the requirement of normal starting and running of the anaerobic tank is met; namely, the second threshold is set to be 30 ℃, at the moment, the anaerobic tank can be normally started to operate, and only by continuously opening Y1 and Y3, hot water is continuously introduced into a part of the heating pipelines 14, so that the temperature of the wastewater in the anaerobic tank is stably maintained to be above 30 ℃, an environment suitable for the survival of anaerobic bacteria is provided, and the purpose of decomposing the wastewater by the anaerobic bacteria can be efficiently completed.
Step 6: when the value sent by the temperature sensor 22 to the processor reaches the set third threshold value, the processor sends signals for turning off Y1 and Y3, the processor sends signals for turning off R1 and R3, and the processor sends signals for turning off the motor 27, and the motor 27 loses power and stops rotating. The third threshold value can be set to 38 ℃, all valves need to be closed at this time, the heating pipeline 14 does not need to be filled with hot water, the anaerobic tank can normally operate, and meanwhile, the motor 27 can be powered off to stop rotating, so that an environment suitable for survival can be provided for anaerobic bacteria, the activity failure of the anaerobic bacteria caused by overhigh temperature of waste water is prevented, and energy is saved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (7)
1. An anaerobic tank heating system is characterized by comprising an anaerobic tank body (11), an external hot water source (12), a water inlet pipe (13), a heating pipeline (14) and a water outlet pipe (15), wherein the heating pipeline (14) is arranged inside the anaerobic tank body (11), two ends of the heating pipeline (14) are respectively connected with the water inlet pipe (13) and the water outlet pipe (15), the water inlet pipe (13) and the water outlet pipe (15) respectively penetrate out of the anaerobic tank body (11), the peripheries of the outer walls of the water inlet pipe (13) and the water outlet pipe (15) are hermetically connected with the anaerobic tank body (11), and one end, far away from the anaerobic tank body (11), of the water inlet pipe (13) is connected with the external hot water source (12);
the water inlet pipe (13), the heating pipeline (14) and the water outlet pipe (15) are arranged in the horizontal direction, the heating pipeline (14) comprises a straight pipe (141) and an arc pipe (142), two ends of the straight pipe (141) are respectively connected with the arc pipe (142), the flow direction of fluid of the heating pipeline (14) is in the S horizontal direction, and the heating pipeline (14) is fully distributed in the inner cavity of the cross section of the anaerobic tank body (11);
the water inlet pipes (13), the heating pipelines (14) and the water outlet pipes (15) are arranged into a plurality of groups and are arranged at intervals up and down, the water inlet pipes (13) are connected in parallel to form a main water inlet pipe (18), and the main water inlet pipe (18) is connected with the external hot water source (12);
a plurality of water outlet pipes (15) are connected in parallel to form a total water outlet pipe (19);
the anaerobic tank body (11) comprises a bottom plate (20), a support (21) is arranged on the bottom plate (20), and one end, far away from the bottom plate (20), of the support (21) is connected with the straight line pipe (141);
the support (21) is an expansion link, the support (21) comprises an inner rod (211) and an outer rod (212), one end of the inner rod (211) is connected with the bottom plate (20), the other end, far away from the bottom plate (20), of the inner rod (211) is embedded into the outer rod (212), a support plate (24) is arranged at the other end, far away from the inner rod (211), of the outer rod (212), and the support plate (24) is connected with the linear tube (141);
a cover plate (26) is arranged at the top end of the anaerobic tank body (11), a motor (27) is arranged on the outer side of the cover plate (26), the motor (27) is arranged in the center of the cover plate (26), an output shaft of the motor (27) is connected with a rotating shaft (28), an external thread is arranged at one end, far away from the motor (27), of the rotating shaft (28), a first sleeve (29) is arranged on the support plate (24), the first sleeve (29) is vertically upward and is in penetrating connection with the support plate (24), a cavity is arranged in the first sleeve (29), a nut (30) is arranged at the top end of the first sleeve (29), a blocking cover (31) is arranged at the bottom end of the first sleeve (29), an internal thread is arranged on the nut (30), and the internal thread is matched with the external thread;
a second sleeve (32) is connected to one end, close to the cover plate (26), of the rotating shaft (28), a cavity is formed in the second sleeve (32), an end cover (33) is arranged at the top end of the second sleeve (32), the rotating shaft (28) penetrates through the end cover (33) downwards and is fixedly connected with the end cover (33), the top end of the first sleeve (29) is embedded into the second sleeve (32), the rotating shaft (28) is screwed on the nut (30), the rotating shaft (28) extends into the first sleeve (29), and a sealing ring (34) is arranged at the bottom end of the second sleeve (32);
the outer wall of the second sleeve (32) is provided with blades (35), and the blades (35) are uniformly distributed on the circumference and staggered at intervals from top to bottom.
2. The anaerobic tank warming system according to claim 1, wherein a first valve (16) is provided on the water inlet pipe (13), a second valve (17) is provided on the water outlet pipe (15), the first valve (16) and the second valve (17) are both provided outside the anaerobic tank (11), and the first valve (16) is located between the anaerobic tank (11) and the external hot water source (12).
3. The anaerobic tank warming system according to claim 1, wherein the water inlet pipe (13), the heating pipeline (14) and the water outlet pipe (15) are all stainless steel pipes, the welding seams are argon arc welding bottoming and electric welding covering welding methods, and a pressing test is performed.
4. The anaerobic tank heating system according to claim 1, wherein the support plate (24) comprises a first support plate (241) and a second support plate (242), the first support plate (241) and the second support plate (242) are alternately arranged up and down, the first support plate (241) is provided with a plurality of first long holes (36), the second support plate (242) is provided with a plurality of second long holes (37), and the axis of the first long holes (36) and the axis of the second long holes (37) are perpendicular to each other.
5. The anaerobic tank warming system according to claim 2, further comprising a processor and a temperature sensor (22), wherein the temperature sensor (22) is connected with the processor, the first valve (16) and the second valve (17) are both provided as electromagnetic valves, the processor is connected with the first valve (16) and the second valve (17), respectively, and the processor is connected with the motor (27);
the temperature sensor (22) is arranged in the anaerobic tank body (11), the temperature sensor (22) is used for acquiring the temperature of the wastewater in the anaerobic tank body (11) and sending the temperature value to the processor, and the processor sends an opening or closing signal to the first valve (16) and the second valve (17);
the processor sends a signal to the motor (27) to start or stop.
6. A method of fast and smooth warming using the anaerobic tank warming system according to claim 1, comprising the steps of:
step 1: a heating pipeline (14) is arranged inside the anaerobic tank body (11), two ends of the heating pipeline (14) are respectively connected with a water inlet pipe (13) and a water outlet pipe (15), the water inlet pipe (13) and the water outlet pipe (15) penetrate out of the anaerobic tank body (11), the peripheries of the outer walls of the water inlet pipe (13) and the water outlet pipe (15) are in welded sealing connection with the anaerobic tank body (11), and the water inlet pipe (13) is connected with an external hot water source (12) through an external pipeline;
step 2: the external pipeline is additionally provided with a hot water delivery pump, the external hot water source (12) adopts hot water with the residual production temperature of more than or equal to 30 ℃ and less than or equal to 80 ℃, and the hot water of the external hot water source (12) is continuously input into the heating pipeline (14) through the hot water delivery pump and realizes direct heat and cold exchange with the wastewater in the anaerobic tank body (11).
7. The method for fast and smooth warming of an anaerobic tank warming system according to claim 6, further comprising the steps of:
and step 3: all the first valves (16) are numbered as Y1, Y2, Y3 and Y4 from bottom to top in sequence; numbering all the second valves (17) from bottom to top as R1, R2, R3 and R4 in sequence, and pre-arranging the numbering of the first valves (16) and the second valves (17) in a processor;
and 4, step 4: a temperature sensor (22) in the anaerobic tank body (11) monitors the temperature of the wastewater in the anaerobic tank body (11) in real time and sends the temperature value to a processor, when the sent value is lower than a set first threshold value, all first valves (16) and second valves (17) are opened, hot water with the residual temperature of more than or equal to 30 ℃ and less than or equal to 80 ℃ is continuously introduced into a plurality of groups of heating pipelines (14), and meanwhile, the processor sends a signal for starting a motor (27), so that the motor (27) is electrified to rotate;
and 5: when the value sent by the temperature sensor (22) to the processor reaches a set second threshold value, the processor sends signals for closing Y2 and Y4, and simultaneously sends signals for closing R2 and R4;
step 6: when the value sent by the temperature sensor (22) to the processor reaches a set third threshold value, the processor sends signals for turning off Y1 and Y3, meanwhile, the processor sends signals for turning off R1 and R3, and the processor sends signals for turning off the motor (27), and the motor (27) loses power and stops rotating.
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