CN111547845A - Anaerobic ammonia oxidation reactor stable operation system based on multi-energy complementation - Google Patents
Anaerobic ammonia oxidation reactor stable operation system based on multi-energy complementation Download PDFInfo
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- CN111547845A CN111547845A CN202010490324.3A CN202010490324A CN111547845A CN 111547845 A CN111547845 A CN 111547845A CN 202010490324 A CN202010490324 A CN 202010490324A CN 111547845 A CN111547845 A CN 111547845A
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
Abstract
The invention discloses a stable operation system of an anaerobic ammonia oxidation reactor based on multi-energy complementation; the system comprises an anaerobic ammonia oxidation reaction system and a sewage warming system, and warming measures are taken for an anaerobic ammonia oxidation reactor through a heat storage water tank device in a sludge methane energy-solar energy-air energy coupling complementary mode, wherein the sludge methane system is a main heating system, and a solar heat collection system and an air source heat pump system are used as guarantee heating systems. The sewage in the regulating tank is provided with heat by the methane energy, the solar energy and the air energy at any two or three of the methane energy, the solar energy and the air energy simultaneously, so that the requirement of the anaerobic ammonia oxidation reactor on the environmental temperature in the operation process can be met, the anaerobic ammonia oxidation bacteria have good activity, and the aim of high-efficiency and energy-saving denitrification is fulfilled. Has the advantages of energy conservation, low operation cost, continuous and lasting temperature increasing effect, strong processing capacity, stable operation effect and the like.
Description
Technical Field
The invention relates to a heating system for biochemical treatment of sewage; in particular to an anaerobic ammonia oxidation reactor stable operation system based on multi-energy complementation.
Background
In the biological wastewater treatment process, the energy consumption of the traditional biological denitrification process is high, and the biological denitrification process is difficult to be used for treating wastewater with a low carbon-nitrogen ratio. The anaerobic ammonia oxidation reaction is an autotrophic process of oxidizing ammonia nitrogen into nitrogen by taking nitrite nitrogen as an electron acceptor, does not need an additional carbon source, and can reduce the energy consumption by about 60 percent in industrial application. Therefore, the anaerobic ammonia oxidation process is considered as an environment-friendly denitrification technology and has a wide development prospect. However, the anammox reaction is susceptible to environmental factors such as temperature, organic matter, dissolved oxygen, light, etc., wherein the temperature has a significant effect on the anammox bacteria. Temperature dependence is an important factor affecting the operation of bioreactors, affecting microbial activity mainly by affecting microbial enzymatic reactions, and there are two main ways, one affecting the rate of enzymatic reactions and the other affecting the rate of diffusion of substrates into cells. As a biological treatment process, the temperature influence on the anaerobic ammonia oxidation is large, the anaerobic ammonia oxidation bacteria are reported to be inhibited at the optimum growth temperature of 30-40 ℃ respectively, and the water temperature is approximately 5-20 ℃ along with the climate change of four seasons in municipal and industrial wastewater treatment, so that the anaerobic ammonia oxidation process needs to deal with the severe challenge brought by the low temperature in the wastewater treatment. Therefore, in practical application, the method needs to be overcome by manual means, and meanwhile, the stable operation of the anaerobic ammonia oxidation reactor is realized by adopting measures of heat preservation of conventional materials to a biological reaction tank and the like.
Disclosure of Invention
The invention aims to provide a stable operation system of an anaerobic ammonia oxidation reactor based on multi-energy complementation.
The invention is realized by the following technical scheme:
the invention relates to a stable operation system of an anaerobic ammonia oxidation reactor based on multi-energy complementation, which comprises an anaerobic ammonia oxidation reaction system and a sewage warming system;
wherein the content of the first and second substances,
the anaerobic ammonia oxidation reaction system comprises: the system comprises a regulating tank 1, an anaerobic ammonia oxidation reaction tank 2, a sludge digestion tank 3 and a biogas collection bag 4;
the sewage heating system comprises: the system comprises a sludge methane system, a solar heat collecting system, an air source heat pump system and a heat storage water tank device, wherein the sludge methane system is a main heating system, and the solar heat collecting system and the air source heat pump system are used as guarantee heating systems.
Preferably, the sludge methane system comprises: the system comprises a gas boiler 7, a first temperature measuring device 8, a second temperature measuring device 12, a methane pump 6, a first valve 5, a second valve 9, a third valve 13 and a first water pump 10.
Preferably, the solar energy collection system comprises: the solar water heater comprises a vacuum tube solar water heater 23, a second water pump 26, a fourth valve 25, a fifth valve 28, a third temperature measuring device 24 and a fourth temperature measuring device 27.
Preferably, the air source heat pump system comprises: the device comprises a condenser 16, a throttling device 17, an air heat exchanger 18, a compressor 19, a third water pump 22, a sixth valve 14, a seventh valve 21, a fifth temperature measuring device 15 and a sixth temperature measuring device 20.
Preferably, the hot water storage tank device includes: a seventh temperature measuring device 29, an eighth temperature measuring device 31, an eighth valve 30, a ninth valve 32 and a fourth water pump 33.
Preferably, the biogas water heater system, the solar heat collection system and the air source heat pump system share the heat storage water tank 11.
The sewage heating system is additionally arranged in the invention and is based on complementary utilization of clean energy of sludge methane energy, solar energy and air energy; the invention utilizes the complementarity of the biogas energy generated by the sludge in the sewage plant, the intermittent and unstable solar energy and the air heat energy available everywhere in space and time, so that the anaerobic ammonia oxidation reactor realizes stable denitrification, and simultaneously can provide heat preservation for the biological treatment unit of the sewage plant in the severe cold region in winter.
Three subsystems (a sludge methane system, a solar heat collection system and an air source heat pump system) of the sewage heating system are mutually connected in parallel; the system comprises a sludge methane system, a solar heat collection system, an air source heat pump system, a heat pump system and a heat pump system, wherein the sludge methane system is a main heating system, and the solar heat collection system; according to the design, the valves of the systems can be jointly opened according to actual requirements, and the biogas energy, the solar energy and the air energy can provide heat for the sewage in the regulating tank at any two or three of the systems simultaneously.
When the energy required for raising the temperature of the sewage is reduced, the hot water in the heat storage water tank in the device can be supplied for other purposes, so that the requirements of other hot water can be met.
The method of the invention has the following advantages:
(1) the invention relates to a stable operation system of an anaerobic ammonia oxidation reactor based on multi-energy complementation, which comprises an anaerobic ammonia oxidation reaction system and a sewage warming system, wherein a sludge methane energy-solar energy-air energy coupling complementation mode is mainly used for taking warming measures for the anaerobic ammonia oxidation reactor, so that the efficient and stable denitrification of anaerobic ammonia oxidizing bacteria is realized.
(2) The sewage heating system is additionally arranged, so that the requirement of the anaerobic ammonia oxidation reactor on the water environment temperature in the operation process can be met, a proper environmental condition is provided for the anabolism of anaerobic ammonia oxidation bacteria, the anaerobic ammonia oxidation bacteria have good activity, and the aims of high efficiency, energy conservation and deep denitrification are fulfilled; meanwhile, the system can provide suitable heat preservation measures for the biological sewage treatment system in cold regions in winter, and has the advantages of energy conservation, low operation cost, continuous and lasting temperature increasing effect, strong treatment capability, stable operation effect and the like.
(3) The invention adopts a heating mode of coupling various energy sources, so that the excess sludge in the sewage plant can be effectively utilized, and simultaneously, clean energy sources are adopted, thereby avoiding the waste of resources and providing a certain guarantee for the long-term stable operation of the sewage treatment device.
(4) The heating device can open the valves of all subsystems independently or jointly, and the methane energy, the solar energy and the air energy can supply heat to the heating device of the methane adjusting tank at any two or three times.
(5) When the energy required for raising the temperature of the sewage is reduced, the hot water in the heat storage water tank in the device can be supplied for other purposes, so that the requirements of other hot water can be met.
Drawings
FIG. 1 is a schematic flow diagram of a system for stably operating an anaerobic ammonia oxidation reactor based on multi-energy complementation.
Detailed Description
The present invention will be described in detail with reference to specific examples. It should be noted that the following examples are only illustrative of the present invention, but the scope of the present invention is not limited to the following examples.
Examples
The embodiment relates to a stable operation system of an anaerobic ammonia oxidation reactor based on multi-energy complementation, which is shown in the attached figure 1: the system comprises an anaerobic ammonia oxidation reaction system and a sewage temperature increasing system;
wherein the content of the first and second substances,
the anaerobic ammonia oxidation reaction system comprises: the system comprises a regulating tank 1, an anaerobic ammonia oxidation reaction tank 2, a sludge digestion tank 3 and a biogas collection bag 4;
the sewage heating system comprises: the system comprises a sludge methane system, a solar heat collecting system, an air source heat pump system and a heat storage water tank device, wherein the sludge methane system is a main heating system, and the solar heat collecting system and the air source heat pump system are used as guarantee heating systems.
Preferably, the sludge methane system comprises: the system comprises a gas boiler 7, a first temperature measuring device 8, a second temperature measuring device 12, a methane pump 6, a first valve 5, a second valve 9, a third valve 13 and a first water pump 10.
Preferably, the solar energy collection system comprises: the solar water heater comprises a vacuum tube solar water heater 23, a second water pump 26, a fourth valve 25, a fifth valve 28, a third temperature measuring device 24 and a fourth temperature measuring device 27.
Preferably, the air source heat pump system comprises: the system comprises a condenser 16, a throttling device 17, an air heat exchanger 18, a compressor 19, a third water pump 22, a sixth valve 14, a seventh valve 21, a fifth temperature measuring device 15 and a sixth temperature measuring device 20.
Preferably, the hot water storage tank device includes: a seventh temperature measuring device 29, an eighth temperature measuring device 31, an eighth valve 30, a ninth valve 32 and a fourth water pump 33.
Preferably, the biogas water heater system, the solar heat collection system and the air source heat pump system share the heat storage water tank 11.
The sewage heating system is additionally arranged in the invention and is based on complementary utilization of clean energy of sludge methane energy, solar energy and air energy; the invention utilizes the complementarity of the biogas energy generated by the sludge in the sewage plant, the intermittent and unstable solar energy and the air heat energy available everywhere in space and time, so that the anaerobic ammonia oxidation reactor realizes stable denitrification, and simultaneously can provide heat preservation for the biological treatment unit of the sewage plant in the severe cold region in winter.
Three subsystems (a sludge methane system, a solar heat collection system and an air source heat pump system) of the sewage heating system are mutually connected in parallel; the system comprises a sludge methane system, a solar heat collection system, an air source heat pump system, a heat pump system and a heat pump system, wherein the sludge methane system is a main heating system, and the solar heat collection system; according to the design, the valves of the systems can be jointly opened according to actual requirements, and the biogas energy, the solar energy and the air energy can provide heat for the sewage in the regulating tank at any two or three of the systems simultaneously.
When the energy required for raising the temperature of the sewage is reduced, the hot water in the heat storage water tank in the device can be supplied for other purposes, so that the requirements of other hot water can be met.
The working principle of the invention is as follows:
the adjusting tank is arranged in front of the anaerobic ammonia oxidation reaction tank, the hot water pipe is laid in the construction process of the adjusting tank, and meanwhile the position height of the heat storage water tank meets the requirement that low-temperature water flows back to the heating system by means of gravity.
The sewage after primary treatment firstly enters the regulating tank 1, meanwhile, the sludge methane-solar energy-air coupling complementary heating system heats the sewage in the regulating tank, the sewage enters the anaerobic ammonia oxidation reaction tank 2 after the temperature of the sewage reaches 30-40 ℃, anaerobic ammonia oxidation bacteria are rapidly propagated at a proper temperature (30-40 ℃) and have good activity, and total nitrogen can be rapidly and effectively removed. And residual sludge generated in the anaerobic ammonia oxidation reaction tank enters a digestion tank 3 to generate biogas, and the biogas is sent to a biogas collection bag 4 and conveyed to a gas boiler 7 for combustion and utilization.
Three subsystems (a sludge methane subsystem, a solar heat collection subsystem and an air source heat pump subsystem) in the heating system are connected in parallel, and share the heat storage water tank 11. The sludge methane subsystem is a main heating system, the solar heat collecting subsystem and the air source heat pump subsystem are used as guarantee heating systems, valves of the three subsystems can be jointly opened according to actual requirements, and any two or three of the sludge methane, solar energy and air energy can simultaneously provide heat for water in the heat storage water tank 11.
Hot water flowing out of the heat storage water tank 11 is introduced into a hot water pipeline in the regulating tank 1 to heat the sewage to raise the temperature of the sewage, so that the temperature of the sewage is maintained at 30-40 ℃ when the sewage enters the biological unit.
When the main heating system is operated only, namely the sludge methane subsystem supplies hot water to the heat storage water tank 11, the system is operated only in a methane energy mode, the first valve 5, the second valve 9, the third valve 13, the eighth valve 30 and the ninth valve 32 are opened, the other valves are closed, the first water pump 10 and the fourth water pump 33 are operated, methane in the methane collection bag 4 enters the gas boiler 7 through the methane pump 6 to be combusted, heat generated by the combustion is input into the heat storage water tank 11, the heat storage water tank sends hot water to the regulating reservoir 1 by means of gravity flow for heating sewage, and when the water temperature in the hot water pipe of the regulating reservoir is reduced, low-temperature water flows back to the heat storage water tank 11 through the fourth water pump 33 for heating. The mode generally operates under the working conditions of insufficient solar energy irradiation and low air temperature and mainly depends on the combustion of methane in the gas storage bag.
When the main heating system is heated by the solar heat collecting subsystem, the system runs in a methane energy-solar energy complementary mode, the first valve 5, the second valve 9, the third valve 13, the fourth valve 25, the fifth valve 28, the eighth valve 30 and the ninth valve 32 are opened, the other valves are closed, the methane pump 6, the first water pump 10, the second water pump 26 and the fourth water pump 33 run, the solar heat collector and the gas boiler simultaneously input solar radiation heat and methane combustion heat into the heat storage water tank 11, and the heat storage water tank returns hot water to the regulating reservoir 1 by means of gravity flow for heating sewage. This mode operates at night when the air temperature is very low and the air source heat pump can hardly absorb heat from the air (when the heat pump COP is close to 1), but requires a clear day and sufficient biogas storage.
When the main heating system is heated by the air source heat pump subsystem, the system runs in a methane energy-air energy complementary mode, when the system runs in the methane energy-air energy complementary mode, the first valve 5, the second valve 9, the third valve 13, the sixth valve 14, the seventh valve 21, the eighth valve 30 and the ninth valve 32 are opened, the rest valves are closed, the first water pump 10, the third water pump 22 and the fourth water pump 33 run, the gas-fired boiler 7 is opened, the air source heat pump system and the gas-fired boiler 7 simultaneously input air energy and methane combustion heat into the heat storage water tank 11, and the heat storage water tank returns hot water to the regulating reservoir 1 by means of gravity flow for heating sewage. This mode requires operation at higher air temperatures.
When the main heating system is heated by taking the solar heat collecting subsystem and the air source heat pump subsystem as guarantees, all valves and the gas boiler are opened when the system operates in a sludge methane-solar energy-air energy complementary mode, the solar heat collector, the methane water heater and the air source heat pump simultaneously input solar radiation heat, methane combustion heat and air energy into the heat storage water tank, and the heat storage water tank transfers the heat to sewage in the regulating reservoir. The mode has low requirements on air temperature, solar energy guarantee rate and methane storage amount, and is an operation mode with the widest application range.
The preferable sludge concentration MLSS in the anaerobic ammonia oxidation reaction tank 2 is more than or equal to 3000 mg/L.
When the energy required for raising the temperature of the sewage is reduced, the hot water in the hot water storage tank 11 in the device can be supplied for other uses, and the requirements of other hot water are met.
The heat preservation method can be suitable for bioreactors of anaerobic ammonia oxidizing bacteria such as an up-flow anaerobic sludge bed reactor (UASB), an anaerobic granular sludge expanded bed (EGSB), a bioreactor (SBR) and the like, and is also suitable for heat preservation of a sewage biochemical treatment system in cold regions in winter.
The method of the invention has the following advantages: (1) the invention relates to a stable operation system of an anaerobic ammonia oxidation reactor based on multi-energy complementation, which comprises an anaerobic ammonia oxidation reaction system and a sewage warming system, wherein a sludge methane energy-solar energy-air energy coupling complementation mode is mainly used for taking warming measures for the anaerobic ammonia oxidation reactor, so that the efficient and stable denitrification of anaerobic ammonia oxidizing bacteria is realized. (2) The sewage heating system is additionally arranged, so that the requirement of the anaerobic ammonia oxidation reactor on the water environment temperature in the operation process can be met, a proper environmental condition is provided for the anabolism of anaerobic ammonia oxidation bacteria, the anaerobic ammonia oxidation bacteria have good activity, and the aims of high efficiency, energy conservation and deep denitrification are fulfilled; meanwhile, the system can provide suitable heat preservation measures for the biological sewage treatment system in cold regions in winter, and has the advantages of energy conservation, low operation cost, continuous and lasting temperature increasing effect, strong treatment capability, stable operation effect and the like. (3) The invention adopts a heating mode of coupling various energy sources, so that the excess sludge in the sewage plant can be effectively utilized, and simultaneously, clean energy sources are adopted, thereby avoiding the waste of resources and providing a certain guarantee for the long-term stable operation of the sewage treatment device. (4) The heating device can open the valves of all subsystems independently or jointly, and the methane energy, the solar energy and the air energy can supply heat to the heating device of the methane adjusting tank at any two or three times. (5) When the energy required for raising the temperature of the sewage is reduced, the hot water in the heat storage water tank in the device can be supplied for other purposes, so that the requirements of other hot water can be met.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (6)
1. A stable operation system of an anaerobic ammonia oxidation reactor based on multi-energy complementation is characterized by comprising an anaerobic ammonia oxidation reaction system and a sewage temperature increasing system;
wherein the content of the first and second substances,
the anaerobic ammonia oxidation reaction system comprises: the system comprises a regulating tank (1), an anaerobic ammonia oxidation reaction tank (2), a sludge digestion tank (3) and a biogas collecting bag (4);
the sewage heating system comprises: the system comprises a sludge methane system, a solar heat collecting system, an air source heat pump system and a heat storage water tank device, wherein the sludge methane system is a main heating system, and the solar heat collecting system and the air source heat pump system are guarantee heating systems.
2. The system for stably operating an anammox reactor based on multipotential complementation according to claim 1, wherein the sludge methane system comprises: the device comprises a gas boiler (7), a first temperature measuring device (8), a second temperature measuring device (12), a methane pump (6), a first valve (5), a second valve (9), a third valve (13) and a first water pump (10).
3. The system for stable operation of an anammox reactor based on multipotential complementation according to claim 1, wherein said solar energy collection system comprises: the solar water heater comprises a vacuum tube solar water heater (23), a second water pump (26), a fourth valve (25), a fifth valve (28), a third temperature measuring device (24) and a fourth temperature measuring device (27).
4. The system for stable operation of an anammox reactor based on multi-energy complementation according to claim 1, wherein the air source heat pump system comprises: the air conditioner comprises a condenser (16), a throttling device (17), an air heat exchanger (18), a compressor (19), a third water pump (22), a sixth valve (14), a seventh valve (21), a fifth temperature measuring device (15) and a sixth temperature measuring device (20).
5. The system for stable operation of an anammox reactor based on multipotential complementation according to claim 1, wherein the hot water storage tank device comprises: a seventh temperature measuring device (29), an eighth temperature measuring device (31), an eighth valve (30), a ninth valve (32) and a fourth water pump (33).
6. The system for stably operating the anammox reactor based on the multi-energy complementation according to claim 1, wherein the biogas water heater system, the solar heat collection system and the air source heat pump system share a heat storage water tank (11).
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| CN113686021A (en) * | 2021-08-23 | 2021-11-23 | 青海优德环保工程有限公司 | Device and method for heating and controlling temperature of sewage inlet water by adopting air-source heat pump |
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