CN109737473B - Waste heat recovery system and process of back pressure type heat supply unit - Google Patents
Waste heat recovery system and process of back pressure type heat supply unit Download PDFInfo
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Abstract
The invention relates to a waste heat recovery system and a waste heat recovery process of a back pressure type heat supply unit, wherein the waste heat recovery system comprises the following components: the heat supply auxiliary equipment of the first station heat supply pipe network backwater main pipe, the heat supply pipe network system with the circulating water pump, the heat supply auxiliary equipment circulating cooling water system of the heat supply unit and the heat pipe network system water supplementing system are characterized by further comprising a water absorbing pipe which is connected with a water inlet of the circulating cooling water pump and circulates basic cooling water, wherein a water supplementing water outlet pipe of the heat supply pipe network is divided into two paths, one path is correspondingly connected with four paths of supplementing cooling water branch pipes, the other path is connected with a circulating cooling water outlet main pipe, the circulating cooling water outlet main pipe is connected with the tail end of the first station heat supply pipe network backwater main pipe, and the water is supplemented to the heat supply pipe network system through the circulating water pump of the heat supply pipe network. The advantages are that: the invention effectively recovers and utilizes the waste heat energy in the circulating cooling water of the back pressure type heat supply unit, supplements the waste heat energy into the waste heat recovery system of the heat supply pipe network, and realizes energy conservation and consumption reduction.
Description
Technical Field
The invention belongs to the technical field of energy recycling, and particularly relates to a device for increasing the external heat supply of a heat supply generating set
The capability, the waste heat recovery system and the process of the back pressure type heat supply unit for improving the total heat efficiency of the cogeneration.
Background
The turbine with the exhaust pressure greater than the atmospheric pressure is called a back pressure turbine, and if the back pressure turbine is used as the heat supply system in the thermal power plant, the heat supply system may be called a back pressure heat supply unit. The back pressure type heat supply unit has the capacity of 3-50 MW generally, the back pressure type heat supply unit has no cold source loss, the economy of thermodynamic cycle is the best in all heat and power cogeneration units, the important support of national energy saving and emission reduction policies is obtained (the development of energy source [ 2016 ] 617), and the back pressure type heat supply unit is widely popularized and built in the north of China in recent years.
At present, a final heat user of a back pressure unit thermal power plant for central heating in northern cities commonly adopts a heating mode of low-temperature water coil pipe floor heat radiation, a large hot water heating pipe network system adopting a mixed water heat exchange mode is adopted for a secondary station, a certain amount of fresh water is required to be continuously supplemented during normal operation so as to maintain the normal working pressure of the whole hot water pipe network, the return water temperature of a primary network of a first station in the plant is the return water temperature of the secondary network, and the actual operation return water temperature is generally about 40 ℃. The process flow of the heat supply network water supplementing system is shown in figure 2, the purified heat supply network water supplementing water is pressurized by a heat supply network water supplementing pipe, then is supplemented into a head station heat supply network water returning main pipe by a pressure cold water supplementing main pipe, and is pressurized by a heat supply network circulating water pump, and then the head station heat supply network heater participates in the circulation of the heat supply network system. The temperature of the water replenishing water of the heat supply network in winter in the north is lower, generally below 12 ℃, and after entering the heat supply network for circulation, the water replenishing water can be synchronously and simultaneously warmed with the heat supply network by consuming a considerable amount of heat, so that the total heat supply efficiency is reduced.
Although the back pressure type turbo generator set has no cold source loss, auxiliary equipment such as an air cooler, an oil cooler, a vapor seal cooler and various rotating mechanical bearings in a plant of the heat supply unit are required to maintain normal and safe operation, a large amount of waste heat still needs to be taken away by circulating cooling water, and low-grade heat energy in the back pressure type turbo generator set is difficult to recover due to the low temperature (33-39 ℃ or below) of the circulating cooling water and can only be diffused into the atmosphere through a cooling tower, so that the waste heat of the system is wasted, the water of the cooling tower is seriously evaporated, and the water resource is wasted. The specific process flow of the circulating cooling water system of the heat supply unit is shown in figure 3, after the circulating water is pressurized by a cooling circulating water pump, the circulating water is respectively subjected to heat absorption by an air cooler, an oil cooler, a vapor seal cooler, various rotating mechanical bearing cooling devices and the like, then enters a cooling tower for spraying and radiating, and is collected at the bottom of the tower and then enters the cooling circulating water pump to form a circulating system.
In the existing thermal power plant, the temperatures and flow rates of the heat supply network supplementing water and the circulating cooling water in the two processes are completely mismatched, so that the two processes cannot be fully and complementarily utilized, and double waste and loss of system energy are caused.
Disclosure of Invention
The invention aims to provide a waste heat recovery system and a waste heat recovery process for recycling waste heat energy in circulating cooling water of a back pressure type heat supply unit and supplementing the waste heat energy into the back pressure type heat supply unit of a heat supply pipe network, so as to realize energy conservation, consumption reduction and improvement of total heat efficiency of cogeneration.
The invention aims at realizing the following technical scheme:
the invention relates to a waste heat recovery system of a back pressure type heat supply unit, which comprises: the heat supply system comprises a first station heat supply pipe network backwater main pipe, heat dissipation auxiliary equipment of a heat supply unit, a heat supply pipe network circulating water pump connected with the tail end of the first station heat supply pipe network backwater main pipe and a heat supply pipe network system connected with a water outlet of the heat supply pipe network circulating water pump; the circulating cooling water system of the heat-radiating auxiliary equipment of the heat-supplying unit is matched with the air cooler, the oil cooler, the vapor seal cooler and the cooling devices of the rotary mechanical bearings of the heat-supplying unit; the system is composed of a water supplementing suction pipe of a heat supply pipe network system, a variable-frequency speed-regulating water supplementing pump and a water supplementing outlet pipe of the heat supply pipe network, wherein the circulating cooling water system of heat dissipation auxiliary equipment of the heat supply unit comprises a circulating cooling water pump, a circulating cooling water inlet main pipe connected with a water outlet of the circulating cooling water pump, four paths of circulating cooling water branch pipes connected with the circulating cooling water inlet main pipe and used for cooling an air cooler, an oil cooler, a gland seal cooler and cooling devices of all rotating mechanical bearings, opening and closing valves A1, A2, A3 and A4 respectively arranged on the four paths of circulating cooling water branch pipes before the heat supply unit and opening and closing valves D1, D2, D3 and D4 respectively arranged on the four paths of circulating cooling water branch pipes after the heat supply unit are connected with the tail ends of the four paths of circulating cooling water branch pipes, and is characterized in that: the system also comprises a circulating basic cooling water suction pipe with an opening and closing valve G, which is connected with a water return main pipe of the primary station heating pipe network, and the circulating basic cooling water suction pipe is connected with a water inlet of a circulating cooling water pump;
the heating pipe network water supplementing outlet pipe is divided into two paths, namely a heating pipe network water supplementing outlet pipe I and a heating pipe network water supplementing outlet pipe II, the heating pipe network water supplementing outlet pipe I is divided into four paths of supplementing cooling water branch pipes, the four paths of supplementing cooling water branch pipes are correspondingly provided with opening and closing valves B1, B2, B3 and B4, and the tail ends of the four paths of supplementing cooling water branch pipes are correspondingly connected with four paths of supplementing cooling water branch pipes behind the opening and closing valves A1, A2, A3 and A4 respectively; the water supplementing outlet pipe II of the heat supply pipe network is provided with an opening and closing valve C, the tail end of the opening and closing valve C is connected with the circulating cooling water outlet main pipe, the circulating cooling water outlet main pipe is connected with the tail end of the water returning main pipe of the heat supply pipe network of the first station, and the water is supplemented to the heat supply pipe network system through the circulating water pump of the heat supply pipe network.
The corresponding circulating cooling water branch pipes behind the air cooler, the oil cooler and the vapor seal cooler are also respectively provided with an emergency water drain pipe I with a control valve E1, an emergency water drain pipe II with a control valve E2 and an emergency water drain pipe III with a control valve E3.
The invention relates to a waste heat recovery process of a back pressure type heat supply unit, which is characterized by comprising the following steps of:
1) Firstly, opening an on-off valve G on a circulating basic cooling water suction pipe, extracting backwater with the temperature below 40 ℃ in a backwater main pipe of a first station heating pipe network to serve as basic cooling water of heat dissipation auxiliary equipment of a heating unit, and feeding the basic cooling water into four paths of circulating cooling water branch pipes of the heating unit, wherein the on-off valves A1, A2, A3 and A4 and on-off valves D1, D2, D3 and D4 on the four paths of circulating cooling water branch pipes are in a normally open state;
2) After the heat supply unit is normally put into operation, an on-off valve C on a water supplementing outlet pipe II of a heat supply pipe network is closed, the heat supply pipe network water with the temperature of 7-12 ℃ is used as the supplement cooling water of heat supply unit heat dissipation auxiliary equipment, the water supplementing outlet pipe I of the heat supply pipe network and four water supplementing branch pipes of the heat supply pipe network are respectively mixed with basic cooling water in four circulating cooling water branch pipes of the heat supply unit, at the moment, on-off valves B1, B2, B3 and B4 on the four water supplementing branch pipes are in a normally open state, the mixed water temperature is below 33 ℃ and used as the circulating cooling water of the heat supply unit heat dissipation auxiliary equipment, the heat supply unit heat dissipation auxiliary equipment is cooled, the water temperature after absorbing heat energy reaches above 40 ℃, the circulating cooling water is collected to a circulating cooling water outlet main pipe, and then the circulating cooling water is used as the supplement water of the heat supply pipe network system to enter the tail end of a return water main pipe of a first station heat supply pipe network, and then the circulating water pump of the heat supply pipe network participates in the circulation heat supply system.
The water supply quantity of the basic cooling water and the supplementary cooling water is 3:1.
When the heat supply pipe network system supplies heat for the first time, the opening and closing valves B1, B2, B3 and B4 on the four paths of supplementary cooling water branch pipes are closed, the opening and closing valve C on the water supplementing outlet pipe II of the heat supply pipe network is opened, and the supplementary water is directly fed into the heat supply pipe network system through the circulating cooling water outlet main pipe; after the heating pipe network system is put into operation with full water, the opening and closing valve C is closed to be in a normally closed state, and the pressure of the heating pipe network is regulated through the variable-frequency speed-regulating water supplementing pump.
When the operation temperature of the air cooler of the heat supply unit is abnormal, the control valve E1 and the emergency water discharge pipe I are opened.
When the operating temperature of the oil cooler of the heat supply unit is abnormal, the control valve E2 and the emergency water discharge pipe II are opened.
When the operation temperature of the gland cooler of the heat supply unit is abnormal, the control valve E3 and the emergency water discharging pipe III are opened.
The invention has the advantages that:
1) The invention adopts the circulating cooling water which is used as heat-supply unit heat-dissipation auxiliary equipment and has proper temperature and flow rate after the part of backwater of the primary heat-supply pipe network of the first station of the back-pressure heat-supply unit of the thermal power plant is mixed with the water supplemented by the heat-supply pipe network, and the circulating cooling water is used as the backwater main pipe of the primary heat-supply pipe network of the first station after the waste heat of the air cooler, the oil cooler, the vapor seal cooler and the various rotating mechanical bearing cooling devices in the heat-supply unit heat-dissipation auxiliary equipment is absorbed, and participates in the circulating heat supply of the heat supply network. All waste heat of auxiliary machines of the heat supply generating set is effectively absorbed and used for heating and supplying heat to the outside, zero loss recycling of the waste heat of the back pressure type heat supply generating set is realized, energy is saved, the total heat efficiency of the thermal power plant is improved, and therefore the purposes of energy conservation and consumption reduction are achieved.
2) The circulating cooling water system of the heat dissipation auxiliary equipment of the heat supply unit cancels the cooling tower commonly used in the prior thermal power plant, saves the construction and equipment purchase and installation cost of the cooling tower, does not add other new equipment such as a heat pump or a heat exchanger, realizes zero investment for waste heat recovery of the back pressure heat supply unit, avoids large amount of industrial waste heat and water resources from being diffused into the atmosphere, realizes zero diffusion of waste heat of the back pressure heat supply unit, and protects and promotes improvement of ecological environment. Improving the economic benefit of the thermoelectric unit.
3) Generally, open circulation cooling water with heat dissipation capacity of a cooling tower is adopted, and the water quality is continuously deteriorated along with long-time contact with wind and sand in the atmospheric environment, so that the problems of scale formation, corrosion, blockage and the like of heat exchange auxiliary equipment are easily caused. The circulating cooling water process system completely adopts closed circulation, and the water quality is improved and updated along with the continuous replenishment of new heat supply network replenishment water, so that the problem of scale formation corrosion of open circulation can be completely avoided, the heat exchange efficiency of each device is improved, and the maintenance cost is reduced.
4) The invention is economical and practical, does not need to add any new equipment, only needs to innovatively split, connect and combine the conventional pipeline system, and recycles the heat source wasted by the back pressure type heat supply unit of the thermal power plant, thereby meeting the requirements of energy conservation, emission reduction, circular economy and green sustainable development advocated by China.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of an original water supply system of a heat supply pipe network.
Fig. 3 is a schematic structural diagram of the circulating cooling water system of the original heating unit.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a waste heat recovery system of a back pressure type heating unit of the present invention includes: the heat supply system comprises a first-station heat supply pipe network backwater main pipe 1, heat dissipation auxiliary equipment of a heat supply unit, a heat supply pipe network circulating water pump 2 connected with the tail end of the first-station heat supply pipe network backwater main pipe 1 and a heat supply pipe network system connected with a water outlet of the heat supply pipe network circulating water pump 2; the circulating cooling water system of the heat-dissipating auxiliary equipment of the heat-supplying unit is matched with the air cooler 6, the oil cooler 7, the vapor seal cooler 8 and the rotating mechanical bearing cooling devices 9 of the heat-supplying unit; the heat dissipation auxiliary equipment circulating cooling water system of the heat supply unit comprises a circulating cooling water pump 4, a circulating cooling water inlet main pipe 5 connected with a water outlet of the circulating cooling water pump 4, four paths of circulating cooling water branch pipes connected with the circulating cooling water inlet main pipe 5 and used for cooling an air cooler 6, an oil cooler 7, a gland seal cooler 8 and each rotating mechanical bearing cooling device 9, opening and closing valves A1, A2, A3 and A4 respectively arranged in front of the heat supply unit on the four paths of circulating cooling water branch pipes and opening and closing valves D1, D2, D3 and D4 respectively arranged behind the heat supply unit on the four paths of circulating cooling water branch pipes, and a circulating cooling water outlet main pipe 10 connected with the tail ends of the four paths of circulating cooling water branch pipes, and is characterized in that: the system also comprises a circulating basic cooling water suction pipe 3 with an opening and closing valve G, which is connected with the water return header pipe 1 of the primary station heating pipe network, wherein the circulating basic cooling water suction pipe 3 is connected with the water inlet of the circulating cooling water pump 4;
the heating pipe network water supplementing outlet pipe 13 is divided into two paths, namely a heating pipe network water supplementing outlet pipe I14 and a heating pipe network water supplementing outlet pipe II 15, the heating pipe network water supplementing outlet pipe I14 is divided into four paths of supplementing cooling water branch pipes, the four paths of supplementing cooling water branch pipes are correspondingly provided with opening and closing valves B1, B2, B3 and B4, and the tail ends of the four paths of supplementing cooling water branch pipes are correspondingly connected with four paths of supplementing cooling water branch pipes behind the opening and closing valves A1, A2, A3 and A4 respectively; the water supplementing and discharging pipe II 15 of the heating pipe network is provided with an opening and closing valve C, the tail end of the opening and closing valve C is connected with the circulating cooling water outlet main pipe 10, the circulating cooling water outlet main pipe 10 is connected with the tail end 1 of the water returning main pipe of the heating pipe network of the first station, and the water is supplemented to the heating pipe network system through the circulating water pump 2 of the heating pipe network.
The corresponding circulating cooling water branch pipes behind the air cooler 6, the oil cooler 7 and the vapor seal cooler 8 are also respectively provided with an emergency water discharge pipe I with a control valve E1, an emergency water discharge pipe II with a control valve E2 and an emergency water discharge pipe III with a control valve E3.
The invention relates to a waste heat recovery process of a back pressure type heat supply unit, which is characterized by comprising the following steps of:
1) Firstly, opening an on-off valve G on a circulating basic cooling water suction pipe 3, extracting backwater with the temperature below 40 ℃ in a backwater main pipe 1 of a first station heating pipe network to serve as basic cooling water of heat dissipation auxiliary equipment of a heating unit, and feeding the basic cooling water into four paths of circulating cooling water branch pipes of the heating unit, wherein the on-off valves A1, A2, A3 and A4 and on-off valves D1, D2, D3 and D4 on the four paths of circulating cooling water branch pipes are in a normally open state;
2) After the heat supply unit is normally put into operation, an opening and closing valve C on a heat supply pipe network water supplementing outlet pipe II 15 is closed, heat supply pipe network water supplementing with the temperature of 7-12 ℃ is used as the supplement cooling water of heat supply unit heat dissipation auxiliary equipment, the heat supply pipe network water supplementing outlet pipe I14 and four heat supply pipe network water supplementing branch pipes are respectively mixed with basic cooling water in four circulating cooling water branch pipes of the heat supply unit, at the moment, opening and closing valves B1, B2, B3 and B4 on the four circulating cooling water supplementing branch pipes are in a normally open state, the water supply quantity of the basic cooling water and the supplement cooling water is 3:1, the mixed water temperature is below 33 ℃, the mixed water temperature is used as the circulating cooling water of the heat supply unit heat dissipation auxiliary equipment, the heat supply unit heat dissipation auxiliary equipment is cooled, the water temperature after heat absorption reaches above 40 ℃, the circulating cooling water is collected to a circulating cooling water outlet main pipe 10, and then the circulating cooling water is used as a pipe network system water supplementing water entering the tail end of a first station heat supply main pipe 1, and the circulating heat supply system is participated in a heat supply system through a pipe network circulating water pump 2 heat supply pipe network system.
Further, when the heat supply pipe network system supplies heat for the first time, the opening and closing valves B1, B2, B3 and B4 on the four paths of the supplementary cooling water branch pipes are closed, the opening and closing valve C on the water supplementing outlet pipe II 15 of the heat supply pipe network is opened, and the supplementary water is directly fed into the heat supply pipe network system through the circulating cooling water outlet main pipe 10; after the heating pipe network system is put into operation with full water, the opening and closing valve C is closed to be in a normally closed state, and the pressure of the heating pipe network is regulated through the variable-frequency speed-regulating water supplementing pump 12.
When the operation temperature of the air cooler 6 of the heat supply unit is abnormal, the control valve E1 and the emergency water discharge pipe I are opened to adjust the operation temperature of the air cooler 6 of the heat supply unit.
When the operating temperature of the oil cooler 7 of the heating unit is abnormal, the control valve E2 and the emergency water discharge pipe II are opened to adjust the operating temperature of the oil cooler 7 of the heating unit.
When the operation temperature of the gland cooler 8 of the heat supply unit is abnormal, the control valve E3 and the emergency water discharging pipe III are opened to adjust the operation temperature of the gland cooler 8 of the heat supply unit.
Claims (6)
1. A waste heat recovery process of a back pressure type heat supply unit adopts a waste heat recovery system of the back pressure type heat supply unit, and the waste heat recovery system of the back pressure type heat supply unit comprises: the heat supply system comprises a first station heat supply pipe network backwater main pipe, heat dissipation auxiliary equipment of a heat supply unit, a heat supply pipe network circulating water pump connected with the tail end of the first station heat supply pipe network backwater main pipe and a heat supply pipe network system connected with a water outlet of the heat supply pipe network circulating water pump; the circulating cooling water system of the heat-radiating auxiliary equipment of the heat-supplying unit is matched with the air cooler, the oil cooler, the vapor seal cooler and the cooling devices of the rotary mechanical bearings of the heat-supplying unit; the circulating cooling water system of the heat dissipation auxiliary equipment of the heat supply unit comprises a circulating cooling water pump, a circulating cooling water inlet main pipe connected with a water outlet of the circulating cooling water pump, four-way circulating cooling water branch pipes connected with the circulating cooling water inlet main pipe and used for cooling an air cooler, an oil cooler, a vapor seal cooler and cooling devices of all rotating mechanical bearings, opening and closing valves A1, A2, A3 and A4 respectively arranged in front of the heat supply unit on the four-way circulating cooling water branch pipes, opening and closing valves D1, D2, D3 and D4 respectively arranged behind the heat supply unit on the four-way circulating cooling water branch pipes, and a circulating cooling water outlet main pipe connected with the tail end of the four-way circulating cooling water branch pipes,
the heating pipe network water supplementing outlet pipe is divided into two paths, namely a heating pipe network water supplementing outlet pipe I and a heating pipe network water supplementing outlet pipe II, the heating pipe network water supplementing outlet pipe I is divided into four paths of supplementing cooling water branch pipes, the four paths of supplementing cooling water branch pipes are correspondingly provided with opening and closing valves B1, B2, B3 and B4, and the tail ends of the four paths of supplementing cooling water branch pipes are correspondingly connected with four paths of supplementing cooling water branch pipes behind the opening and closing valves A1, A2, A3 and A4 respectively; the water supplementing outlet pipe II of the heat supply pipe network is provided with an opening and closing valve C, the tail end of the opening and closing valve C is connected with the circulating cooling water outlet main pipe, the circulating cooling water outlet main pipe is connected with the tail end of the water returning main pipe of the heat supply pipe network of the first station, and the water is supplemented to the heat supply pipe network system through the circulating water pump of the heat supply pipe network;
the waste heat recovery process of the back pressure type heat supply unit comprises the following steps of:
1) Firstly, opening an on-off valve G on a circulating basic cooling water suction pipe, extracting backwater with the temperature below 40 ℃ in a backwater main pipe of a first station heating pipe network to serve as basic cooling water of heat dissipation auxiliary equipment of a heating unit, and feeding the basic cooling water into four paths of circulating cooling water branch pipes of the heating unit, wherein the on-off valves A1, A2, A3 and A4 and on-off valves D1, D2, D3 and D4 on the four paths of circulating cooling water branch pipes are in a normally open state;
2) After the heat supply unit is normally put into operation, an on-off valve C on a water supplementing outlet pipe II of a heat supply pipe network is closed, the heat supply pipe network water with the temperature of 7-12 ℃ is used as the supplement cooling water of heat supply unit heat dissipation auxiliary equipment, the water supplementing outlet pipe I of the heat supply pipe network and four water supplementing branch pipes of the heat supply pipe network are respectively mixed with basic cooling water in four circulating cooling water branch pipes of the heat supply unit, at the moment, on-off valves B1, B2, B3 and B4 on the four water supplementing branch pipes are in a normally open state, the mixed water temperature is below 33 ℃ and used as the circulating cooling water of heat supply unit heat dissipation auxiliary equipment, the heat supply unit heat dissipation auxiliary equipment is cooled, the water temperature after absorbing heat energy reaches above 40 ℃, the circulating cooling water is collected to a circulating cooling water outlet main pipe, and then the circulating cooling water is used as the supplement water of the heat supply pipe network system to enter the tail end of a main pipe network of a first station heat supply pipe, and then the circulating water pump of the heat supply pipe network participates in the circulating heat supply system; the water supply quantity of the basic cooling water and the supplementary cooling water is 3:1.
2. The waste heat recovery process of a back pressure heating unit of claim 1, wherein: the corresponding circulating cooling water branch pipes behind the air cooler, the oil cooler and the vapor seal cooler are also respectively provided with an emergency water drain pipe I with a control valve E1, an emergency water drain pipe II with a control valve E2 and an emergency water drain pipe III with a control valve E3.
3. The waste heat recovery process of a back pressure type heat supply unit according to claim 1, wherein when the heat supply pipe network system supplies heat for the first time, the on-off valves B1, B2, B3 and B4 on the four branch pipes of the supplementary cooling water are closed, the on-off valve C on the water supply outlet pipe ii of the heat supply pipe network is opened, and the supplementary water is directly supplied to the heat supply pipe network system through the water supply outlet pipe main of the circulating cooling water; after the heating pipe network system is put into operation with full water, the opening and closing valve C is closed to be in a normally closed state, and the pressure of the heating pipe network is regulated through the variable-frequency speed-regulating water supplementing pump.
4. The waste heat recovery process of a back pressure type heat supply unit according to claim 2, wherein the control valve E1 and the emergency water discharge pipe i are opened when an abnormality occurs in the operation temperature of the air cooler of the heat supply unit.
5. The waste heat recovery process of a back pressure type heating unit according to claim 2, wherein the control valve E2 and the emergency discharge pipe ii are opened when an abnormality occurs in the operation temperature of the oil cooler of the heating unit.
6. A waste heat recovery process of a back pressure type heat supply unit according to claim 2, wherein when an abnormality occurs in the operation temperature of a gland cooler of the heat supply unit, the control valve E3 and the emergency water discharge pipe iii are opened.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203010729U (en) * | 2012-12-20 | 2013-06-19 | 田瑞天 | Waste heat recovery device of industrial equipment |
| KR20150084201A (en) * | 2014-01-13 | 2015-07-22 | 최영환 | Energy saving type heating supply system |
| CN207196594U (en) * | 2017-06-29 | 2018-04-06 | 中冶华天南京工程技术有限公司 | A kind of more factories are residual heat combined to utilize system |
| CN108302897A (en) * | 2018-03-25 | 2018-07-20 | 徐齐越 | A kind of energy-saving cooling system for chip factory |
| CN209588142U (en) * | 2019-03-05 | 2019-11-05 | 中冶北方（大连）工程技术有限公司 | A kind of Waste Heat Recovery System of back pressure type thermal power plant unit |
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2019
- 2019-03-05 CN CN201910163489.7A patent/CN109737473B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203010729U (en) * | 2012-12-20 | 2013-06-19 | 田瑞天 | Waste heat recovery device of industrial equipment |
| KR20150084201A (en) * | 2014-01-13 | 2015-07-22 | 최영환 | Energy saving type heating supply system |
| CN207196594U (en) * | 2017-06-29 | 2018-04-06 | 中冶华天南京工程技术有限公司 | A kind of more factories are residual heat combined to utilize system |
| CN108302897A (en) * | 2018-03-25 | 2018-07-20 | 徐齐越 | A kind of energy-saving cooling system for chip factory |
| CN209588142U (en) * | 2019-03-05 | 2019-11-05 | 中冶北方（大连）工程技术有限公司 | A kind of Waste Heat Recovery System of back pressure type thermal power plant unit |
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