CN211552050U - Heat energy comprehensive utilization system in low-nitrogen transformation of heat conduction oil boiler - Google Patents
Heat energy comprehensive utilization system in low-nitrogen transformation of heat conduction oil boiler Download PDFInfo
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Abstract
The utility model relates to a heat energy comprehensive utilization system in heat conduction oil boiler low-nitrogen transformation, including a heat conduction oil boiler low-nitrogen transformation heat energy comprehensive utilization system, including the heat conduction oil boiler, the first circulating line that intercommunication heat conduction oil boiler owner goes out oil pipe and owner advances oil pipe, set up in secondary circulation pipeline on the first circulating line, and intercommunication the backflow pipeline at secondary circulation pipeline both ends, secondary circulation pipeline goes up secondary circulating pump, the low temperature heat equipment that sets gradually according to the heat conduction oil flow direction, be provided with the oil cooler on the backflow pipeline, the low temperature conduction oil import of oil cooler with backflow pipeline's oil feed end is connected, the high temperature conduction oil export of oil cooler with backflow pipeline's oil outlet end is connected. The utility model discloses during heat recovery was used to the conduction oil secondary circulation system, with traditional conduction oil secondary circulation system from simple heat supply function, promote for not only heat supply but also retrieve the multiple function of waste heat.
Description
Technical Field
The utility model belongs to the technical field of the heating equipment, concretely relates to heat energy comprehensive utilization system in heat conduction oil boiler low nitrogen transformation.
Background
The gas heat-conducting oil boiler is widely applied to asphalt coiled material production enterprises. The content of nitrogen oxides (NOx) in flue gas discharged by a common gas heat-conducting oil boiler is 150mg/m3Left and right. Along with the improvement of national environmental protection control standards and requirements, different regions respectively produce heat-conducting oil boilers for gas with the weight of less than or equal to 80mg/m3、≤50mg/m3、≤30mg/m3And the like, flue gas nitrogen oxide (NOx) emission standards. Therefore, a 'hot tide' for low-nitrogen emission reconstruction of the gas heat transfer oil boiler is formed in various places.
The low-nitrogen combustion of the gas heat-conducting oil boiler is usually implemented by two measures, on one hand, the inner structure of the boiler is improved, so that air and gas are combusted in a combustion chamber in a grading way, and meanwhile, local smoke internal circulation is formed at the outlet of a flame tube by controlling the air flow speed at the outlet of a combustion head, so that the concentration of fuel and oxygen is reduced, the heat of flame is absorbed, and the generation of NOx is inhibited. On the other hand, the 'flue gas external circulation combustion technology' is needed, and part of the flue gas is extracted from a chimney, mixed with fresh air and then sent to a combustor for combustion supporting. The aim is to reduce the oxygen concentration in the combustion air, and the flue gas can absorb the flame heat, thereby reducing the combustion speed and the flame temperature and achieving the aim of reducing the NOx emission. The combination of the two measures can reduce the NOx emission index to be less than or equal to 30mg/m3。
In actual production operation, the lower the nitrogen oxide (NOx) in the discharged flue gas is, the lower the efficiency of the gas heat transfer oil boiler is, and the greater the energy loss of the discharged flue gas is. Namely: from 150mg/m3To 80mg/m3、80mg/m3To 50mg/m3、50mg/m3To 30mg/m3The efficiency of the gas heat-conducting oil boiler is reduced by about 3% by an emission index level, and the heat loss brought away by the discharged flue gas can be increased; from ordinary gas conduction oil boilerChanged to 30mg/m3The low-nitrogen emission gas conduction oil boiler reduces the combustion efficiency of the conduction oil boiler and causes about 10% energy loss.
Taking the asphalt waterproof coiled material production enterprise to use more 4100-4200Kw (namely 350-360 ten thousand Kcal/h) heat transfer oil boilers as an example. When a low-nitrogen emission burner is not modified, the temperature of flue gas from the heat-conducting oil boiler out of a hearth is 290-300 ℃, the flue gas passes through an air preheater, the temperature of the flue gas is reduced to 100-120 ℃ by using the heat exchange of air entering the burner and is discharged out, the temperature of the air entering the burner is heated to 230 ℃ from the normal temperature, and thus most of heat brought out of the flue gas from the hearth is brought into the hearth. If a low-nitrogen emission combustor is modified, the temperature of mixed (containing FGR flue gas) air entering combustion gas needs to be controlled to be about 100 ℃, so that most (80-90 percent, about 30 ten thousand Kcal/h) heat brought out by the flue gas of a hearth cannot be brought into the hearth through the air entering the combustor, and an effective mode needs to be adopted to recover the heat in the flue gas.
Therefore, in asphalt waterproof coiled material production enterprises, the heat recovery and energy loss reduction are very remarkable in benefit while the low-nitrogen emission modification of the heat conduction oil boiler is well done.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect, provide a heat energy comprehensive utilization system in the low nitrogen transformation of conduction oil boiler.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a heat energy comprehensive utilization system in low-nitrogen transformation of a heat conduction oil boiler comprises the heat conduction oil boiler, a first circulating pipeline communicated with a main oil outlet pipe and a main oil inlet pipe of the heat conduction oil boiler, wherein the first circulating pipeline comprises a first oil inlet pipe, a secondary circulating pipeline and a first oil outlet pipe which are sequentially communicated, and a return pipeline communicated with two ends of the secondary circulating pipeline; the secondary circulation pipeline is sequentially provided with a secondary circulation pump and low-temperature heat utilization equipment according to the flow direction of heat conduction oil, the return pipeline is provided with an oil cooler, a low-temperature heat conduction oil inlet of the oil cooler is connected with an oil inlet end of the return pipeline, and a high-temperature heat conduction oil outlet of the oil cooler is connected with an oil outlet end of the return pipeline.
Further, first valves are arranged on the secondary circulation pipeline upstream and downstream of the low-temperature heat utilization equipment, upstream and downstream of a secondary circulation pump on the secondary circulation pipeline, and upstream and downstream of an oil cooler on the return pipeline; the oil outlet end of the backflow pipeline and the first oil outlet pipe are also provided with one-way check valves.
Furthermore, a first flow control valve is arranged on the first oil inlet pipe, a temperature sensor is arranged on the secondary circulating pipeline, the temperature sensor is arranged at the downstream of the secondary circulating pump according to the flowing direction of heat conduction oil, and the temperature sensor is in signal connection with the first flow control valve.
Furthermore, the first oil inlet pipe is further provided with a second valve, and the second valve and the first flow control valve are respectively arranged on the first oil inlet pipe through corresponding first branch pipes.
Further, still including the second circulating line who feeds through the main oil pipe and the main oil pipe that advance of conduction oil boiler, be provided with high temperature on the second circulating line and use thermal equipment.
Furthermore, the system also comprises a third circulating pipeline which is communicated with a main oil outlet pipe and a main oil inlet pipe of the heat transfer oil boiler.
Further, the low-temperature heat utilization equipment is an asphalt storage tank.
Furthermore, the oil cooler is communicated with the heat conduction oil boiler through a flue gas pipeline.
Furthermore, the device also comprises an air preheater communicated with the oil cooler through a flue gas pipeline, and a chimney communicated with the air preheater through a flue gas pipeline; and a hot air outlet of the air preheater is communicated with an air inlet of the heat-conducting oil boiler through an air inlet pipeline.
Furthermore, a flue gas backflow pipeline is arranged on a flue gas pipeline between the air preheater and the chimney, and the other end of the flue gas backflow pipeline is communicated with the air inlet pipeline.
Compared with the prior art, the beneficial effects of the utility model reside in that:
1. the utility model discloses a set up secondary circulation system to set up the oil cooler on secondary circulation system's return line, heat and secondary circulation system through utilizing the oil cooler to retrieve heats the low temperature conduction oil, thereby use the conduction oil secondary circulation system to heat recovery, fundamentally says, with traditional conduction oil secondary circulation system from simple heat supply function, promote for not only heat supply but also retrieve the multiple function of waste heat.
2. The utility model discloses a heat in the flue gas is retrieved to the oil cooler that sets up and heat conduction oil boiler exhanst gas outlet is linked together to set up the oil cooler on heat conduction oil secondary circulation system's return line, thereby realized the thermal recycle of flue gas, its effect is splendid.
Drawings
FIG. 1 is a system block diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the present invention;
in the figure: 1. the system comprises a heat conduction oil boiler, 2 parts of a main oil outlet pipe, 3 parts of a main oil inlet pipe, 4 parts of a first circulation pipeline, 4 parts of a secondary circulation pipeline, 4 parts of 2 parts of a return pipeline, 4 parts of 3 parts of a secondary circulation pump, 4 parts of a low-temperature heat utilization device, 4 parts of 5 parts of an oil cooler, 4 parts of 6 parts of a temperature sensor, 4 parts of 7 parts of a first branch pipe, 4 parts of 8 parts of a second branch pipe, 4 parts of 9 parts of a pressure sensor, 4 parts of 10 parts of a first oil inlet pipe, 4 parts of 11 parts of a first oil outlet pipe, 5 parts of a second circulation pipeline, 5 parts of 1 part of a; 6. a third circulation pipe; 7. a flue gas pipeline 8, an air preheater 9 and a chimney; 10. an air inlet pipeline 11, a flue gas backflow pipeline 12, a first flow control valve 13 and a second flow control valve; 14. the system comprises a one-way check valve, 15, a stop valve, 16, a blower, 17, a water outlet, 18, a circulating fan, 19, a third flow regulating valve, 20, a first three-way joint, 21 and a second three-way joint.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings.
The heat-conducting oil boiler low-nitrogen modification heat energy comprehensive utilization system shown in figure 1 comprises a heat-conducting oil boiler 1, a first circulating pipeline 4, a second circulating pipeline 5 and a third circulating pipeline 6 which are communicated with a main oil outlet pipe 2 and a main oil inlet pipe 3 of the heat-conducting oil boiler 1, wherein a high-temperature heat utilization device 5-1 is arranged on the second circulating pipeline 5, the first circulating pipeline 4 comprises a first oil inlet pipe 4-10, a second circulating pipeline 4-1 and a first oil outlet pipe 4-11 which are sequentially communicated, and return pipelines 4-2 communicated with two ends of the second circulating pipeline 4-1 (specifically, the first oil inlet pipe 4-10, the second circulating pipeline 4-1 and the return pipelines 4-2 are communicated through a first three-way joint 20, and the second circulating pipeline 4-1, the return pipelines 4-2 and the first oil outlet pipe 4-11 are communicated through a second three-way joint 21 ) (ii) a According to the flow direction of heat conducting oil, a secondary circulating pump 4-3 and a low-temperature heat utilization device 4-4 are sequentially arranged on the secondary circulating pipeline 4-1, a high-temperature heat conducting oil inlet of the low-temperature heat utilization device 4-4 is connected with an oil inlet end of the secondary circulating pipeline 4-1, and a low-temperature heat conducting oil outlet of the low-temperature heat utilization device 4-4 is connected with an oil outlet end of the secondary circulating pipeline 4-1; the oil inlet end of the return pipeline 4-2 is arranged at the oil outlet end of the secondary circulation pipeline 4-1, and the oil outlet end of the return pipeline 4-2 is arranged at the oil inlet end of the secondary circulation pipeline 4-1; an oil cooler 4-5 is arranged on the return pipeline 4-2, a low-temperature heat conduction oil inlet of the oil cooler 4-5 is communicated with an oil inlet end of the return pipeline 4-2, and a high-temperature heat conduction oil outlet of the oil cooler 4-5 is communicated with an oil outlet end of the return pipeline 4-2. The heat required by the low-temperature heat utilization equipment 4-4 (an asphalt tank area) still comes from a heat conduction oil boiler 1 (the temperature of heat conduction oil required by the asphalt tank area is 130 ℃), but the heat conduction oil boiler 1 provides heat conduction oil with the temperature of 230 ℃, so that a set of heat conduction oil secondary circulation system consisting of a secondary circulation pipeline 4-1 and a return pipeline 4-2 is established in a heat supply system of the asphalt tank area, namely a set of heat conduction oil self-circulation system (also called a heat conduction oil secondary circulation system) is established in the heat supply system of the asphalt tank area by arranging a heat conduction oil secondary circulation pump 4-3, the system can perform self-system circulation operation between a heat exchanger and the heat conduction oil secondary circulation pump 4-3 in the asphalt tank, when the temperature in the system is insufficient, 230 ℃ high-temperature heat conduction oil is supplemented to enter through a high-temperature heat conduction oil pipeline connected with the boiler, maintaining the temperature of heat conducting oil entering a heat exchanger in the asphalt tank at 130 ℃; the utility model discloses a set up secondary circulation pipeline 4-1 and backflow pipeline 4-2 on first circulating line 4 and form conduction oil secondary circulation system, carry out the secondary circulation heating with the partly low temperature conduction oil that low temperature heat equipment 4-4 came out, then carry the heat for low temperature heat equipment 4-4 again, simultaneously because oil cooler 4-5's setting, can utilize the heat of oil cooler 4-5 recovery earlier to carry out the secondary circulation heating again after getting into backflow pipeline 4-2's low temperature conduction oil heats in advance, realized oil cooler 4-5 and retrieved thermal comprehensive utilization.
Further, according to the flow direction of heat conducting oil, first valves are arranged on the upstream and the downstream of the low-temperature heat utilization equipment 4-4 on the secondary circulation pipeline 4-1, the upstream and the downstream of a secondary circulation pump 4-3 on the secondary circulation pipeline 4-1, and the upstream and the downstream of an oil cooler 4-5 on the return pipeline 4-2; a second flow control valve 13 is further arranged in front of the low-temperature heat equipment 4-4 on the secondary circulation pipeline 4-1; the oil outlet end of the return pipeline 4-2 and the first oil outlet pipe 4-11 are also provided with one-way check valves 14; the one-way check valve 14 on the return pipe 4-2 is arranged at the downstream of the corresponding first valve according to the flow direction of the heat conducting oil.
As an embodiment of the heat energy comprehensive utilization system in the low-nitrogen transformation of the heat conducting oil boiler of the present invention, a first flow control valve 12 is arranged on the first oil inlet pipe 4-10, a temperature sensor 4-6 is arranged on the secondary circulation pipeline 4-1, the temperature sensor 4-6 is arranged at the downstream of the secondary circulation pump 4-3 according to the flow direction of the heat conducting oil, and the temperature sensor 4-6 is in signal connection with the first flow control valve 12; the utility model discloses temperature sensor 4-6 is used for detecting the temperature after 230 ℃ conduction oil and 110 ℃ conduction oil mix, and send the temperature information who detects to first flow control valve 12, adjust the flow of 230 ℃ conduction oil in the first oil pipe 4-10 according to the temperature result received by first flow control valve 12, thereby the control gets into the secondary circulation pipeline 4-1 time first oil pipe 4-10 go up the mixing proportion of 230 ℃ conduction oil and the 110 ℃ conduction oil that oil cooler 4-5 came out on the backflow pipeline 4-2, in order to reach the mesh of control mixed back conduction oil temperature.
Furthermore, a second valve is further disposed on the first oil inlet pipe 4-10, the second valve and the first flow control valve 12 are respectively disposed on the first oil inlet pipe 4-10 through a corresponding first branch pipe 4-7, and third valves are disposed on the first branch pipe 4-7 at the upstream and downstream of the first flow control valve 12.
Furthermore, the first valve, the second valve and the third valve are all stop valves 15.
As an embodiment of the heat energy comprehensive utilization system in the low-nitrogen transformation of the heat conducting oil boiler, the number of the secondary circulating pumps 4-3 is 1 or more, and the secondary circulating pumps 4-3 are all arranged on the secondary circulating pipeline 4-1 through the corresponding second branch pipes 4-8.
As an optimized embodiment of the heat energy comprehensive utilization system in the low-nitrogen transformation of the heat conduction oil boiler, the secondary circulation pipeline 4-1 is further provided with a pressure sensor 4-9, the pressure sensor 4-9 is arranged at the downstream of the second branch pipe 4-8 (or the secondary circulation pump 4-3) according to the flow direction of the heat conduction oil, the pressure sensor 4-9 is in signal connection with the secondary circulation pump 4-3, a frequency converter is arranged on the secondary circulation pump 4-3, and the secondary circulation pump 4-3 can adjust the rotating speed of the secondary circulation pump 4-3 through the frequency converter based on the measurement result from the pressure sensor 4-9.
As an embodiment of the heat energy comprehensive utilization system in the low-nitrogen transformation of the heat conducting oil boiler, the low-temperature heat equipment 4-4 is an asphalt storage tank.
As shown in fig. 2, the utility model relates to a heat energy comprehensive utilization system in heat conduction oil boiler low nitrogen transformation, the fume inlet of oil cooler 4-5 with the exhanst gas outlet of heat conduction oil boiler 1 is linked together through flue gas pipeline 7. In the low-nitrogen emission transformation of the heat-conducting oil boiler 1, most of heat brought out by boiler flue gas cannot be recovered by adopting a traditional mode (the traditional mode refers to that air entering a combustor is used for heat recovery, and after the heat is recovered, the air entering the combustor is usually more than 200 ℃), so that large energy loss is caused to waterproof coiled material production enterprises; although the heat conducting oil boiler 1 can also exchange heat with water to produce steam or hot water as a steam boiler, asphalt waterproof coiled material production enterprises do not need low-grade hot water or low-pressure steam, and particularly in summer, low-grade heat is not easy to treat. Therefore, in order to fully recycle the heat brought out by the boiler flue gas, the oil cooler 4-5 is connected into a heat-conducting oil secondary circulation system in series; namely, the heat conducting oil with the temperature of about 100 ℃ coming out of the heat exchanger in the asphalt tank firstly exchanges the heat of the flue gas through the oil cooler 4-5 on the flue gas pipeline of the boiler, the temperature is raised to about 110 ℃, then a small amount of high-temperature heat conducting oil is supplemented through a high-temperature heat conducting oil pipe network of the boiler, and the temperature of the circulating heat conducting oil is still maintained at 130 ℃ and enters the heat exchanger in the tank. The utility model discloses an utilize the flue gas heat and the secondary circulation system of oil cooler 4-5 recovery to heat low temperature conduction oil to use conduction oil secondary circulation system to heat recovery, fundamentally says, with traditional conduction oil secondary circulation system from simple heat supply function, promote to not only heat supply but also retrieve the multiple function of waste heat.
As another embodiment of the heat energy comprehensive utilization system in the low-nitrogen modification of the heat transfer oil boiler, the heat transfer oil boiler further comprises an air preheater 8, wherein a hot flue gas inlet of the air preheater 8 is communicated with a flue gas outlet of the oil cooler 4-5 through a flue gas pipeline 7, and a cold flue gas outlet of the air preheater 8 is communicated with a chimney 9 through the flue gas pipeline 7; and a hot air outlet of the air preheater 8 is communicated with an air inlet of the heat-conducting oil boiler 1 through an air inlet pipeline 10. The utility model discloses a set up air heater 8, let in conduction oil boiler 1 behind the heat heating air in the flue gas that utilizes air heater 8 to retrieve to the thermal recovery of flue gas has been realized.
Further, the cold air inlet of the air preheater 8 is provided with a blower 16 through the intake duct 10.
Furthermore, a flue gas backflow pipeline 11 is arranged on the flue gas pipeline 7 between the air preheater 8 and the chimney 9, the other end of the flue gas backflow pipeline 11 is communicated with the air inlet pipeline 10, and a water outlet 17, a circulating fan 18 and a third flow regulating valve 19 are sequentially arranged on the flue gas backflow pipeline 11 according to the flow direction of flue gas.
The utility model discloses a theory of operation:
1. a part of the high-temperature heat transfer oil with the temperature of 230 ℃ from the heat transfer oil boiler 1 enters a first oil inlet pipe of a first circulation pipeline 4, the heat transfer oil with the temperature of 230 ℃ in a first oil inlet pipe 4-10 is mixed with the heat transfer oil with the temperature of 110 ℃ from an oil cooler 4-5 in a return pipeline 4-2 to form heat transfer oil with the temperature of 130 ℃, the heat transfer oil enters a second circulation pipeline 4-1 to supply heat for low-temperature heat utilization equipment 4-4 (the flow of the heat transfer oil with the temperature of 230 ℃ in the first oil inlet pipe 4-10 is adjusted by arranging a first flow control valve 12 on the first oil inlet pipe 4-10, so that the mixing ratio of the heat transfer oil with the temperature of 230 ℃ and the heat transfer oil with the temperature of 110 ℃ is controlled, and the temperature of the mixed heat transfer oil is controlled), a part of the heat transfer oil with the temperature of 100 ℃ from the low-temperature heat utilization, the other part of the heat transfer oil enters a return pipeline 4-2, the heat transfer oil is heated to 110 ℃ by utilizing the heat of the flue gas recovered by an oil cooler 4-5, then the heat transfer oil is mixed with the heat transfer oil with the temperature of 230 ℃ from a first oil inlet pipe 4-10 to form heat transfer oil with the temperature of 130 ℃, and then the heat transfer oil enters a secondary circulation pipeline 4-1 to supply heat for low-temperature heat utilization equipment 4-4 again.
2. Part of the high-temperature heat transfer oil with the temperature of 230 ℃ coming out of the heat transfer oil boiler 1 enters the second circulating pipeline 5, supplies heat for the high-temperature heat utilization equipment 5-1, and then returns to the heat transfer oil boiler 1 again for heating.
3. In order to ensure the temperature of the heat transfer oil entering the heat transfer oil boiler, part of the high-temperature heat transfer oil at 230 ℃ coming out of the heat transfer oil boiler 1 directly passes through the third circulating pipeline 4 and is mixed with the low-temperature heat transfer oil coming out of the first oil outlet pipe 4-11 and/or the second circulating pipeline 5 of the first circulating pipeline 4 to form heat transfer oil at 200 ℃, and then the heat transfer oil enters the heat transfer oil boiler 1 again.
4. The temperature of the flue gas from the boiler furnace is about 300 ℃ is firstly reduced to 150 ℃ by an oil cooler 4-5, and then is reduced to about 110 ℃ by an air preheater 8, and the flue gas enters a chimney 9 to be discharged. The heat exchange medium of the oil cooler 4-5 is heat conducting oil for supplying heat to an asphalt tank area (low-temperature heat utilization equipment), the heat conducting oil with the temperature of 100 ℃ from the heat exchanger in the asphalt tank exchanges heat through the oil cooler 4-5, the temperature rises by about 10 ℃ to reach 110 ℃; the heat exchange medium of the air preheater 8 is combustion air entering the boiler burner, the temperature of the combustion air rises from normal temperature to 95 ℃ through the air preheater 8, then a small amount of recycled flue gas is mixed, and the mixed air with the temperature of about 100 ℃ enters the boiler burner.
The above-described embodiments are merely preferred examples of the present invention and are not exhaustive of the possible implementations of the present invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (10)
1. A heat energy comprehensive utilization system in low-nitrogen transformation of a heat conduction oil boiler is characterized by comprising the heat conduction oil boiler (1), a first circulating pipeline (4) for communicating a main oil outlet pipe (2) and a main oil inlet pipe (3) of the heat conduction oil boiler (1), wherein the first circulating pipeline (4) comprises a first oil inlet pipe (4-10), a secondary circulating pipeline (4-1) and a first oil outlet pipe (4-11) which are sequentially communicated, and a return pipeline (4-2) for communicating two ends of the secondary circulating pipeline (4-1); a secondary circulating pump (4-3) and a low-temperature heat utilization device (4-4) are sequentially arranged on the secondary circulating pipeline (4-1) according to the flowing direction of heat transfer oil, an oil cooler (4-5) is arranged on the return pipeline (4-2), a low-temperature heat transfer oil inlet of the oil cooler (4-5) is connected with an oil inlet end of the return pipeline (4-2), and a high-temperature heat transfer oil outlet of the oil cooler (4-5) is connected with an oil outlet end of the return pipeline (4-2).
2. The system for comprehensively utilizing the heat energy in the low-nitrogen transformation of the heat-conducting oil boiler according to claim 1, characterized in that first valves are arranged on the secondary circulation pipeline (4-1) at the upstream and the downstream of the low-temperature heat utilization equipment (4-4), on the secondary circulation pipeline (4-1) at the upstream and the downstream of the secondary circulation pump (4-3), and on the return pipeline (4-2) at the upstream and the downstream of the oil cooler (4-5); the oil outlet end of the return pipeline (4-2) and the first oil outlet pipe (4-11) are also provided with one-way check valves (14).
3. The system for comprehensively utilizing heat energy in low-nitrogen transformation of a heat conduction oil boiler according to claim 1, characterized in that a first flow control valve (12) is arranged on the first oil inlet pipe (4-10), a temperature sensor (4-6) is arranged on the secondary circulation pipeline (4-1), the temperature sensor (4-6) is arranged at the downstream of the secondary circulation pump (4-3) according to the flow direction of the heat conduction oil, and the temperature sensor (4-6) is in signal connection with the first flow control valve (12).
4. The system for comprehensively utilizing the heat energy in the low-nitrogen transformation of the heat conduction oil boiler according to claim 3, characterized in that a second valve is further arranged on the first oil inlet pipe (4-10), and the second valve and the first flow control valve (12) are respectively arranged on the first oil inlet pipe (4-10) through a corresponding first branch pipe (4-7).
5. The system for comprehensively utilizing the heat energy in the low-nitrogen transformation of the heat conduction oil boiler according to claim 1, further comprising a second circulation pipeline (5) for communicating a main oil outlet pipe (2) and a main oil inlet pipe (3) of the heat conduction oil boiler (1), wherein the second circulation pipeline (5) is provided with high-temperature heat utilization equipment (5-1).
6. The system for comprehensively utilizing the heat energy in the low-nitrogen transformation of the heat conduction oil boiler according to claim 1, characterized by further comprising a third circulation pipeline (6) for communicating a main oil outlet pipe (2) and a main oil inlet pipe (3) of the heat conduction oil boiler (1).
7. The system for comprehensively utilizing the heat energy in the low-nitrogen transformation of the heat-conducting oil boiler according to any one of claims 1 to 6, characterized in that the low-temperature heat utilization equipment (4-4) is an asphalt storage tank.
8. The system for comprehensively utilizing the heat energy in the low-nitrogen transformation of the heat conduction oil boiler according to any one of claims 1 to 6, characterized in that the oil cooler (4-5) is communicated with the heat conduction oil boiler (1) through a flue gas pipeline (7).
9. The system for comprehensively utilizing the heat energy in the low-nitrogen transformation of the heat conduction oil boiler according to claim 8, characterized by further comprising an air preheater (8) communicated with the oil cooler (4-5) through a flue gas pipeline (7), and a chimney (9) communicated with the air preheater (8) through the flue gas pipeline (7); and a hot air outlet of the air preheater (8) is communicated with an air inlet of the heat-conducting oil boiler (1) through an air inlet pipeline (10).
10. The system for comprehensively utilizing heat energy in low-nitrogen transformation of the heat conduction oil boiler according to claim 9, characterized in that a flue gas return pipeline (11) is arranged on the flue gas pipeline (7) between the air preheater (8) and the chimney (9), and the other end of the flue gas return pipeline (11) is communicated with the air inlet pipeline (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921985926.5U CN211552050U (en) | 2019-11-15 | 2019-11-15 | Heat energy comprehensive utilization system in low-nitrogen transformation of heat conduction oil boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921985926.5U CN211552050U (en) | 2019-11-15 | 2019-11-15 | Heat energy comprehensive utilization system in low-nitrogen transformation of heat conduction oil boiler |
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| Publication Number | Publication Date |
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| CN211552050U true CN211552050U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921985926.5U Active CN211552050U (en) | 2019-11-15 | 2019-11-15 | Heat energy comprehensive utilization system in low-nitrogen transformation of heat conduction oil boiler |
Country Status (1)
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| CN (1) | CN211552050U (en) |
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2019
- 2019-11-15 CN CN201921985926.5U patent/CN211552050U/en active Active
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