A saturated water circulation heating system

Abstract

The present invention discloses a saturated water circulation heating system, comprising a saturated water heating device and a heat exchanger, wherein the heat exchanger comprises a first container and a second container, wherein the first container is provided with a first liquid inlet pipe and a first liquid discharge pipe, and the second container is provided with a second liquid inlet pipe and a second liquid discharge pipe; the first container is arranged in the second container, and a heat exchange mechanism is arranged between the first container and the second container; the first liquid discharge pipe is connected to the input end of the saturated water heating device, the output end of the saturated water heating device is connected to the input end of a heat-using device, and the output end of the heat-using device is connected to the first liquid inlet pipe. The present invention heats saturated water in a closed circulation, which can greatly save energy compared with steam heating, and the volume and floor space are significantly reduced, the boiler cost and infrastructure investment are significantly reduced, the gas consumption is reduced, the gas cost is greatly reduced, and the greenhouse gas emission is also greatly reduced. Moreover, due to the closed circulation heating, there is no waste heat emission loss, which not only saves energy but also greatly saves water.

Description

Technical Field

[0001] The invention relates to the technical field of energy equipment, and in particular to a saturated water circulation heating system. Background Art

[0002] Steam boilers have a history of 400 years. At present, most of the equipment used for heating on the market is steam boilers. The characteristics of steam boilers are high energy consumption. Each ton of 150-degree steam needs to consume 650,000 kcal of calorific value, 151,000 kcal of sensible heat and 500,000 kcal of latent heat of vaporization. Second, the utilization rate is low. During the use of steam, less than 40% of the useful work actually used for heating is used, and more than 60% of the steam is wasted in pipelines and heat-using equipment. Although steam boilers have achieved zero emissions without fuel exhaust pollution, the heat loss of steam boilers is large, there is a large amount of waste heat emission and waste, low energy utilization, and high heating costs.

[0003] At present, saturated water heat pump heating technology has appeared on the market. Its characteristics are energy saving and less heat loss. It cannot reach high temperature, and the highest theoretical data does not exceed 120 degrees. Its technical field adopts the same parallel method as steam, and does not solve the problem of uneven pressure. It is not a mature product. In addition, saturated water heat pump technology itself will produce air during the circulation process, but current technology cannot achieve the air exhaust, which increases the pressure of the saturated water and cannot be used continuously for a long time. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, an object of the present invention is to provide a saturated water circulation heating system.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a saturated water circulation heating system, including a saturated water heating device and a heat exchanger, the heat exchanger including a first container and a second container, the first container is provided with a first liquid inlet pipe and a first liquid discharge pipe, the second container is provided with a second liquid inlet pipe and a second liquid discharge pipe; the first container is arranged in the second container, and a heat exchange mechanism is provided between the first container and the second container; the first liquid discharge pipe is connected to the input end of the saturated water heating device, the output end of the saturated water heating device is connected to the input end of the heat-using equipment, and the output end of the heat-using equipment is connected to the first liquid inlet pipe.

[0006] As an optional scheme of the present invention, the saturated water heating device includes a combustion chamber, an annular heating coil is provided inside the combustion chamber, and the two ends of the heating coil are respectively provided with a water inlet end and a water outlet end, the water inlet end of the heating coil is connected to the first drain pipe, and the water outlet end of the heating coil is connected to the input end of the heat-using equipment; a combustion chamber is provided on the inner side of the heating coil, a burner for spraying flames into the combustion chamber is provided at one end of the combustion chamber, and a smoke exhaust mechanism is provided at the other end of the combustion chamber.

[0007] As an optional scheme of the present invention, the heating coil includes a first coil and a second coil, the first coil and the second coil are both annular, the combustion chamber is arranged on the inner side of the first coil, the second coil is sleeved on the outer side of the first coil, and the second coil is connected to the first coil; the first coil includes a plurality of first tube bodies distributed in an annular shape, the second coil includes a plurality of second tube bodies distributed in an annular shape, the first tube body and the second tube body are staggered, the two ends of the first tube body are respectively connected to the two adjacent second tube bodies, and the two ends of the second tube body are respectively connected to the two adjacent first tube bodies.

[0008] As an optional solution of the present invention, the heating coil also includes a third coil and a fourth coil, the third coil and the fourth coil are both annular, the third coil is sleeved on the outside of the second coil, and the third coil is connected to the second coil, the fourth coil is sleeved on the outside of the third coil, and the fourth coil is connected to the third coil; the third coil includes a plurality of third tube bodies distributed in an annular shape, the fourth coil includes a plurality of fourth tube bodies distributed in an annular shape, the third tube body is staggered with the second tube body, one of the second tube bodies is connected to one of the third tube bodies; the fourth tube body is staggered with the third tube body, two ends of the fourth tube body are respectively connected to two adjacent third tube bodies, and two ends of the third tube body are respectively connected to two adjacent fourth tube bodies.

[0009] As an optional solution of the present invention, the heating coil also includes two oppositely arranged support plates, each of which is provided with a plurality of mounting holes, which respectively match the first tube body, the second tube body, the third tube body and the fourth tube body; a first U-shaped elbow is connected between the end of the first tube body and the end of the second tube body, and a second U-shaped elbow is connected between the end of the third tube body and the end of the fourth tube body.

[0010] As an optional scheme of the present invention, the smoke exhaust mechanism includes a smoke exhaust pipe, one end of the smoke exhaust pipe is connected to the combustion chamber, the other end of the smoke exhaust pipe is connected to the chimney, and a waste heat recovery mechanism is provided on the smoke exhaust pipe; the waste heat recovery mechanism includes a waste heat recovery pipe for recovering the waste heat of the smoke exhaust pipe, and the two ends of the waste heat recovery pipe are respectively provided with a cold water input end and a hot water output end, the cold water input end is connected to a cold water tank, and the hot water output end is connected to the second liquid inlet pipe.

[0011] As an optional solution of the present invention, the heat exchange mechanism includes an annular heat exchange coil, the liquid inlet end of the heat exchange coil is connected to the first liquid inlet pipe, and the liquid outlet end of the heat exchange coil is connected to the interior of the first container; the liquid in the heat exchange coil moves from bottom to top, and the liquid in the second container moves from top to bottom.

[0012] As an optional scheme of the present invention, the heat exchange coil includes a plurality of heat exchange tubes interconnected, and the heat exchange tubes are spirally distributed on the outside of the first container; the heat exchange coil includes three heat exchange tubes interconnected, namely a first heat exchange tube, a second heat exchange tube and a third heat exchange tube, the first heat exchange tube is spirally distributed on the outside of the first container, and the liquid outlet end of the first heat exchange tube is connected to the inside of the first container; the second heat exchange tube is spirally distributed on the outside of the first heat exchange tube, and the liquid outlet end of the second heat exchange tube is connected to the liquid inlet end of the first heat exchange tube; the third heat exchange tube is spirally distributed on the outside of the second heat exchange tube, and the liquid outlet end of the third heat exchange tube is connected to the liquid inlet end of the second heat exchange tube, and the liquid inlet end of the third heat exchange tube is connected to the first liquid inlet tube.

[0013] As an optional solution of the present invention, the heat exchange coil is provided with a support member, and the support member includes a plurality of support plates for supporting the heat exchange coil, and one end of the support plate is connected to the outer wall of the first container.

[0014] As an optional solution of the present invention, the first container is provided with a first water level gauge, a liquid filling tube, a thermometer, a pressure gauge, a safety valve and an exhaust valve; the second container is provided with a second water level gauge and an exhaust pipe; the first container includes an inner tank body, the second container includes an outer tank body, the inner tank body is arranged inside the outer tank body, and a support frame is provided at the bottom of the outer tank body.

[0015] The beneficial effects of the present invention are:

[0016] The present invention provides a saturated water circulation heating system, comprising a saturated water heating device and a heat exchanger, wherein a first liquid discharge pipe is connected to an input end of the saturated water heating device, an output end of the saturated water heating device is connected to an input end of a heat-using device, and an output end of the heat-using device is connected to a first liquid inlet pipe. The present invention heats saturated water in a closed circulation, which can significantly save energy compared with steam heating, and the volume and floor space are significantly reduced, the boiler cost and infrastructure investment are significantly reduced, gas is reduced, gas costs are significantly reduced, greenhouse gas emissions are also significantly reduced, and due to the closed circulation heating, there is no waste heat emission loss, which not only saves energy but also significantly saves water. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a saturated water circulation heating system in a specific embodiment of the present invention;

[0018] Figure 2 is a structural schematic diagram of a heat exchanger from one perspective in a specific embodiment of the present invention;

[0019] Figure 3 is a structural schematic diagram of a heat exchanger from another perspective in a specific embodiment of the present invention;

[0020] Figure 4It is a schematic diagram of the internal structure of the outer tank body in a specific embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the heat exchange coil in a specific implementation manner of the present invention.

[0022] Figure 6 is a schematic structural diagram of a saturated water heating device in a specific embodiment of the present invention;

[0023] Figure 7 is a schematic diagram of the three-dimensional structure of a heating coil in a specific embodiment of the present invention;

[0024] Figure 8 is a schematic diagram of the front structure of a heating coil in a specific embodiment of the present invention;

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure of the first coil and the second coil in a specific implementation manner of the present invention.

[0026] In the figure: 1-inner tank body; 2-outer tank body; 3-first liquid inlet pipe; 4-first liquid discharge pipe; 5-second liquid inlet pipe; 6-second liquid discharge pipe; 7-first heat exchange pipe; 8-second heat exchange pipe; 9-third heat exchange pipe; 10-support plate; 11-first water level gauge; 12-liquid replenishing pipe; 13-temperature gauge; 14-pressure gauge; 15-safety valve; 16-exhaust valve; 17-second water level gauge; 18-exhaust pipe; 19-combustion chamber; 20-heating coil; 21-combustion chamber; 22-burner; 23-first tube body; 24-second tube body; 25-third tube body; 26-fourth tube body; 27-support plate; 28-first elbow; 29-second elbow; 30-exhaust pipe; 31-waste heat recovery mechanism; 32-cold water tank; 33-chimney; 34-fixed frame; 35-water inlet pipe; 36-water outlet pipe. DETAILED DESCRIPTION

[0027] Example

[0028] like Figure 1-Figure 9 As shown, this embodiment provides a saturated water circulation heating system, including a saturated water heating device and a heat exchanger, the heat exchanger including a first container and a second container, the first container is provided with a first liquid inlet pipe 3 and a first liquid discharge pipe 4, the second container is provided with a second liquid inlet pipe 5 and a second liquid discharge pipe 6; the first container is arranged in the second container, and a heat exchange mechanism is arranged between the first container and the second container. The first liquid inlet pipe 3 is used to provide saturated water to the first container, and the temperature of the saturated water is relatively high. The second liquid inlet pipe 5 is used to provide low-temperature tap water to the second container, and the second liquid inlet pipe 5 can also use saturated water. The low-temperature tap water of the second liquid inlet pipe 5 enters the second container, and the heat energy exchange of the saturated water is realized through the heat exchange mechanism.

[0029] The first liquid discharge pipe 4 is connected to the input end of the saturated water heating device, the output end of the saturated water heating device is connected to the input end of the heat-using device, and the output end of the heat-using device is connected to the first liquid inlet pipe 3. The first liquid discharge pipe 4, the saturated water heating device, the heat-using device and the first liquid inlet pipe 3 are connected in sequence, thereby forming a saturated water cycle. There can be multiple heat-using devices, which absorb the heat of the saturated water and return the saturated water to the first liquid inlet pipe 3. The saturated water heating device is used to heat the saturated water output by the first liquid discharge pipe 4 to obtain high-temperature saturated water. The heated high-temperature saturated water enters the heat-using device, and becomes medium-temperature saturated water or low-temperature saturated water after being used by the heat-using device. The medium-temperature saturated water or low-temperature saturated water enters the first container through the first liquid inlet pipe 3, and the waste heat of the medium-temperature saturated water or low-temperature saturated water is transferred to the low-temperature tap water through the heat exchange mechanism. After the medium-temperature saturated water or low-temperature saturated water releases heat, it enters the saturated water heating device through the first liquid discharge pipe 4 and is reheated, thereby realizing the closed cycle heating and heat supply of saturated water, and the low-temperature tap water absorbs heat and becomes hot water for use by other devices.

[0030] The saturated water circulation heating system of the present invention is widely used in washing, printing and dyeing, papermaking, chemical industry, food and other industries. It can replace the traditional ordinary boiler heating method and the existing saturated water heat pump heating technology, which effectively increases the heat utilization rate, reduces production costs and increases benefits.

[0031] like Figure 6 As shown, specifically, the saturated water heating device includes a combustion chamber 19, the combustion chamber 19 has a fixed frame 34, the outer side of the combustion chamber 19 is usually provided with a heat insulation material, the combustion chamber 19 is provided with a ring-shaped heating coil 20, and the two ends of the heating coil 20 are respectively provided with a water inlet end and a water outlet end, the water inlet end and the water outlet end are respectively connected to a saturated water inlet pipe 35 and a water outlet pipe 36, and the water inlet pipe 35 and the water outlet pipe 36 can be provided with pressure gauges 14, thermometers 13, temperature sensors and other components on the water inlet pipe 35 and the water outlet pipe 36, the water inlet pipe 35 is connected to the first liquid discharge pipe 4, and the water outlet pipe 36 is connected to the input end of the heat-using equipment, thereby forming a heating cycle.

[0032] A combustion chamber 21 is provided on the inner side of the heating coil 20, and a burner 22 for spraying flames into the combustion chamber 21 is provided at one end of the combustion chamber 21, and a smoke exhaust mechanism is provided at the other end of the combustion chamber 21. The burner 22 sprays flames to heat the heating coil 20, and the high-temperature exhaust gas after combustion is discharged through the smoke exhaust mechanism. The present invention uses saturated water as a heat source, and can perform cyclic heating, consuming only preheating heat and temperature difference heat, without emitting waste heat, without waste heat loss, high energy utilization rate, low heating cost, and can reduce the burden of heat-using enterprises. The present invention can heat saturated water in a closed cycle, which can greatly save energy compared with steam heating, and the volume and floor space are significantly reduced, the boiler cost and infrastructure investment are significantly reduced, the gas is reduced, the gas cost is greatly reduced, and the greenhouse gas emissions are also greatly reduced. Moreover, due to the closed cycle heating, there is no waste heat emission loss, which not only saves energy, but also greatly saves water.

[0033] like Figure 7 and Figure 8 As shown, specifically, the heating coil 20 includes a first coil and a second coil, the first coil and the second coil are both annular, the combustion chamber 21 is arranged on the inner side of the first coil, the second coil is sleeved on the outer side of the first coil, and the second coil is connected to the first coil. The water inlet pipe 35 can be connected to the first coil or the second coil, and the water inlet pipe 35 provides saturated water to the heating coil 20, which is discharged from the water outlet pipe 36 after heating. The first coil and the second coil can be set as a spiral tube, and the saturated water is heated by passing through the first coil and the second coil in sequence. In order to improve the heating efficiency, in this embodiment, the first coil includes a plurality of first tube bodies 23 distributed in an annular shape, and the second coil includes a plurality of second tube bodies 24 distributed in an annular shape. The first tube body 23 and the second tube body 24 are staggered, and the two ends of the first tube body 23 are respectively connected to the two adjacent second tube bodies 24, and the two ends of the second tube body 24 are respectively connected to the two adjacent first tube bodies 23. The first tube body 23 and the second tube body 24 are arranged along the length direction of the combustion chamber 21. The first tube body 23 and the second tube body 24 are connected in series. The saturated water first enters a first tube body 23, then enters a second tube body 24, and then enters a first tube body 23, and the heating is performed in this cycle.

[0034] like Fig. 9As shown, in this embodiment, the heating coil 20 further includes a third coil and a fourth coil, the third coil and the fourth coil are both annular, the third coil is sleeved on the outside of the second coil, and the third coil is connected to the second coil, the fourth coil is sleeved on the outside of the third coil, and the fourth coil is connected to the third coil. Preferably, the third coil includes a plurality of third tube bodies 25 distributed in an annular shape, and the fourth coil includes a plurality of fourth tube bodies 26 distributed in an annular shape, the third tube body 25 is staggered with the second tube body 24, one of the second tube bodies 24 is connected to one of the third tube bodies 25; the fourth tube body 26 is staggered with the third tube body 25, the two ends of the fourth tube body 26 are respectively connected to the two adjacent third tube bodies 25, and the two ends of the third tube body 25 are respectively connected to the two adjacent fourth tube bodies 26. The third tube body 25 and the fourth tube body 26 are arranged along the length direction of the combustion chamber 21. The third tube body 25 and the fourth tube body 26 are connected in series. Saturated water enters the first tube body 23, is heated by the first tube body 23 and the second tube body 24, and then enters a third tube body 25 from the second tube body 24, then enters a fourth tube body 26, and then enters a third tube body 25. The heating is carried out in this cycle and is finally discharged from the water outlet pipe 36.

[0035] The heating coil 20 further includes two supporting plates 27 arranged opposite to each other, and the supporting plates 27 are provided with a plurality of mounting holes, which are matched with the first tube body 23, the second tube body 24, the third tube body 25 and the fourth tube body 26 respectively. A U-shaped first elbow 28 is connected between the end of the first tube body 23 and the end of the second tube body 24, and a U-shaped second elbow 29 is connected between the end of the third tube body 25 and the end of the fourth tube body 26. Both ends of the first tube body 23, the second tube body 24, the third tube body 25 and the fourth tube body 26 pass through the mounting holes of the supporting plate 27, and the first elbow 28 is connected between the end of the first tube body 23 and the end of the second tube body 24, and the second elbow 29 is connected between the end of the third tube body 25 and the end of the fourth tube body 26, so as to realize the circulation heating of saturated water.

[0036] like Figure 6As shown, in this embodiment, the exhaust mechanism includes an exhaust pipe 30, which is U-shaped, one end of which is connected to the combustion chamber 21, and the other end of which is connected to a chimney 33. A waste heat recovery mechanism 31 is provided on the exhaust pipe 30. The waste heat recovery mechanism 31 can recover the waste heat of the high-temperature exhaust gas in the exhaust pipe 30, thereby further improving the energy utilization efficiency. Specifically, the waste heat recovery mechanism 31 includes a waste heat recovery pipe for recovering the waste heat of the exhaust pipe 30, and the two ends of the waste heat recovery pipe are respectively provided with a cold water input end and a hot water output end, the cold water input end is connected to a cold water tank 32, and the hot water output end is connected to the second liquid inlet pipe 5, which is used to provide tap water to the second container, so as to realize further heating of the tap water. The cold water tank 32 is arranged above the combustion chamber 19, and provides cold water for the heat exchange tube. The cold water is discharged from the hot water output end after being heated by the high-temperature exhaust gas, and can be directly used by the user.

[0037] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the first container includes an inner tank body 1, and the second container includes an outer tank body 2. The inner tank body 1 is arranged inside the outer tank body 2, and a support frame is provided at the bottom of the outer tank body 2. The inner tank body 1 and the outer tank body 2 are two independent containers, which can store different liquids respectively. The heat exchange mechanism includes an annular heat exchange coil, the liquid inlet end of the heat exchange coil is connected to the first liquid inlet pipe 3, the first liquid inlet pipe 3 passes through the outer tank body 2 and extends into the inner tank body 1 to be connected to the liquid inlet end of the heat exchange coil, the liquid outlet end of the heat exchange coil is connected to the inside of the first container, and the liquids in the first container and the second container are heat exchanged through the heat exchange coil. The first liquid inlet pipe 3 provides the first container with high-temperature liquid with a certain amount of residual heat after use by the heat-using equipment, and the second liquid inlet pipe 5 is used to provide low-temperature liquid to the second container. The high-temperature liquid enters the heat exchange coil from the first liquid inlet pipe 3, and the low-temperature liquid enters the second container from the second liquid inlet pipe 5 and contacts the outer wall of the heat exchange coil. Heat exchange occurs between the low-temperature liquid and the high-temperature liquid, thereby realizing heat recovery and utilization. In addition, the low-temperature liquid inside the outer tank body 2 can directly contact the outer wall of the inner tank body 1, further enhancing the heat exchange effect.

[0038] The present invention can enhance the heat exchange effect between high-temperature liquid and low-temperature liquid by arranging a heat exchange coil. Since the first container is arranged in the second container, most of the heat of the high-temperature liquid in the first container will eventually be transferred to the low-temperature liquid in the second container, which can effectively reduce heat loss and achieve efficient energy recovery. The first liquid inlet pipe 3 is used to provide saturated water to the first container. The temperature of the saturated water is relatively high. The second liquid inlet pipe 5 is used to provide low-temperature tap water to the second container. The second liquid inlet pipe 5 can also use saturated water. The low-temperature tap water of the second liquid inlet pipe 5 falls on the heat exchange coil and can generate some water vapor. The water vapor can be used as other equipment. The high-efficiency heat exchanger of the present invention has good heat exchange effect, which can greatly improve the energy utilization rate of saturated water and reduce heating costs. In order to enhance the heat exchange effect of the heat exchange coil, the liquid of the heat exchange coil moves from bottom to top, and the liquid of the second container moves from top to bottom.

[0039] like Figure 5 As shown, the heat exchange coil includes a plurality of heat exchange tubes interconnected, and the heat exchange tubes are spirally distributed on the outside of the first container. The number of heat exchange tubes can be selected according to specific needs. In this embodiment, the heat exchange coil includes three heat exchange tubes interconnected, namely the first heat exchange tube 7, the second heat exchange tube 8 and the third heat exchange tube 9. The first heat exchange tube 7 is spirally distributed on the outside of the first container, and the liquid outlet end of the first heat exchange tube 7 is connected to the inside of the first container; the second heat exchange tube 8 is spirally distributed on the outside of the first heat exchange tube 7, and the liquid outlet end of the second heat exchange tube 8 is connected to the liquid inlet end of the first heat exchange tube 7; the third heat exchange tube 9 is spirally distributed on the outside of the second heat exchange tube 8, and the liquid outlet end of the third heat exchange tube 9 is connected to the liquid inlet end of the second heat exchange tube 8, and the liquid inlet end of the third heat exchange tube 9 is connected to the first liquid inlet pipe 3. The first heat exchange tube 7 is close to the inner wall of the inner tank body 1, and the saturated water in the first heat exchange tube 7 spirally moves from bottom to top and enters the second heat exchange tube 8. The saturated water in the second heat exchange tube 8 spirally moves from top to bottom and enters the third heat exchange tube 9. The saturated water in the third heat exchange tube 9 spirally moves from bottom to top and finally enters the inner tank body 1. The first heat exchange tube 7, the second heat exchange tube 8 and the third heat exchange tube 9 have a certain gap to ensure that the low-temperature tap water is in full contact with each heat exchange tube to achieve efficient recovery and utilization of heat.

[0040] In order to improve the strength of the heat exchange coil, the heat exchange coil is provided with a support member. Specifically, the support member includes a plurality of support plates 10 for supporting the heat exchange coil, the support plates 10 are distributed in a ring shape on the outside of the first container, one end of the support plate 10 is connected to the outer wall of the first container, and the other end of the support plate 10 extends to the bottom of the heat exchange coil to support the heat exchange coil.

[0041] The first container is provided with a first water level gauge 11, a liquid filling pipe 12, a thermometer 13, a pressure gauge 14, a safety valve 15 and an exhaust valve 16. The existing saturated water heating system technology is not very mature, and air will be generated during the circulation process, but the current technology cannot achieve the purpose of exhausting the air, so that the pressure of the saturated water increases and cannot be used continuously for a long time. The present invention monitors the storage of saturated water in the inner tank body 1 by setting a first water level gauge 11, the thermometer 13 monitors the temperature of the saturated water in the inner tank body 1, and the pressure gauge 14 monitors the air pressure of the saturated water in the inner tank body 1. When the air pressure of the saturated water reaches a certain value, the air can be exhausted through the exhaust valve 16. When the air pressure of the saturated water is large, the safety valve 15 can automatically exhaust the air to improve the safety of the inner tank body 1. After the saturated water is exhausted, the total amount of saturated water in the entire saturated water heating system will be reduced. Therefore, a liquid filling pipe 12 is designed to replenish saturated water into the inner tank body 1 through the liquid filling pipe 12 to ensure that the inner tank body 1 operates safely and stably for a long time.

[0042] The second container is provided with a second water level gauge 17 and an exhaust pipe 18. The second water level gauge 17 is used to monitor the amount of tap water in the outer tank body 2. Since the temperature of the saturated water in the heat exchange coil is relatively high, some water vapor will be generated when the low-temperature tap water contacts the heat exchange coil. The water vapor can be output through the exhaust pipe 18 and further utilized. The low-temperature tap water can be used by other equipment after being heated. In order to reduce the heat loss of the outer tank body 2, the outer tank body 2 can be provided with multiple layers of heat insulation materials such as nano insulation board, aluminum silicate layer, and reflective layer.

[0043] In the saturated water circulation heating system of the present invention, the flue gas inside the combustion chamber 19 is completely covered by the heating coil 20. After being heated, the high-temperature water enters the heat-using equipment and then returns to the heat exchanger, realizing circulation heating with a temperature difference of about 10%. The flue gas in the combustion chamber 19 is recovered by the waste heat recovery mechanism 31, thereby greatly reducing the exhaust temperature and ensuring the safe operation of the saturated water heating device. The heating coil 20 has a large heating area and the flue flow rate is reasonably set, which ensures that the heating coil 20 is fully heated in terms of structure.

[0044] The present invention uses saturated water as a heat source, which has the following advantages: the heat loss of the closed saturated water circulation heating system is basically heat dissipation loss, and the overall heat transfer efficiency is high; while the traditional steam system has large steam traps and exhaust steam losses. In some heating equipment, due to the poor heat transfer characteristics of condensed water, if the equipment uses saturated water, the heat transfer effect can be greatly improved, and the heat loss is less.

[0045] The heat-consuming equipment of the saturated water circulation heating system constitutes a closed circulation heating system. Saturated water at 150°C enters the heat-consuming equipment, is discharged at 130°C and enters the heat exchanger, and then is reheated to 150°C by the saturated water heating device, and the cycle is repeated without steam traps and exhaust steam losses.

[0046] Steam boilers heat water to maintain a certain water level. If the water level meter fails or the water is dried up, it will cause an explosion, which poses a safety hazard. The present invention circulates through a circulating pump, so the safety hazard is very small. Once saturated water leaks, the leakage temperature will drop instantly, and the saturated water will produce mist after contacting the air, which is highly safe.

[0047] Steam boilers are heated by boiling water, which causes scaling of the boiler wall and pipes. Boiler feed water needs to be removed by an ion exchanger to remove ions in the water, such as Ca, Mg, etc. The present invention is a fast-in-fast-out dynamic cycle heating, which avoids the continuous addition of Ca, Mg, etc. ions, so the water is ordinary water and does not need to be softened.

[0048] The present invention is composed of several modules with less than 30L of water, which is not within the supervision scope of boiler pressure vessels, can be placed in a workshop and connected with heat-using equipment, and can be unattended.

[0049] The invention solves the problem of excessively high energy consumption of steam heating, improves energy utilization, reduces energy consumption costs, enables enterprises to greatly save energy, and is conducive to sustainable development.

[0050] The present invention uses saturated water to replace traditional steam as a heat medium for heat exchange. The system uses gas to heat the heating coil 20. By controlling the temperature, pressure and flow rate, the water flow does not undergo phase change in the pipeline. The thermal efficiency is detected to be as high as 99%, which is much higher than the national requirement of 86%.

[0051] The size (diameter, length) of the design cavity of the combustion chamber 19 of the present invention and the number of layers and spacing of the heating coil 20 are designed so that the thickness and length of the flame of the burner 22 are adapted to the cavity, the flame does not scour the heating surface, and under the back pressure curve in the output furnace of the burner 22, the large-space cavity structure is conducive to the full combustion of the fuel, on the one hand, ensuring the complete combustion degree of the fuel of 99.99%, and the cavity design has high heat resistance and good sealing performance. The saturated water circulation heating system is subjected to airtightness test before leaving the factory to ensure the sealing performance of the heating system.

[0052] Increase the service life of the chamber: the overall smoke box design is easy to maintain, and the safe and efficient operation of high-quality valves and instruments ensures the service life of the system.

[0053] It can automatically adjust the tubular saturated water circulation flow, steam flow, and fuel consumption according to computer calculations, and calculate the daily production capacity by consuming water, electricity, and gas, which greatly saves the user's operating costs; it also has a fault diagnosis and prediction function, which can discover hidden dangers of faults in advance and enable users to prevent them before they happen; pressure, water level, temperature, and gas leakage are fully automatic interlocking protection; powerful data recording function, which can record system operation, operation and other parameters in the system memory, and the degree of automation can achieve unattended operation, greatly reducing operating labor costs and reducing management costs.

[0054] The low carbon emission of flue gas fully complies with local and national standards, the combustion pool is highly efficient, and the service life of the combustion chamber 19 is more than 5 years. It is more environmentally friendly with zero sewage discharge, low noise, and the smoke technical indicators can fully meet the most stringent national environmental protection requirements. The appearance is beautiful and novel, and the stainless steel plate is used. The frame is high-temperature sandblasted and sprayed, which is flat and beautiful, durable, and easy to maintain.

[0055] Welding part processing: Heating coil 20, heat exchange coil, cavity, etc. are all welded automatically, with beautiful shape. For welds in small spaces that cannot be entered by machines, manual tungsten inert gas arc welding is used for base and manual arc welding for filling and covering. This process can ensure the penetration of the weld root and the quality of the weld.

[0056] It can be customized according to the factory's heat usage, with system engineering design, supporting equipment installation and commissioning to achieve the actual effect of energy saving for users.

[0057] At present, based on the adjustment of the environmental protection energy industry structure, steam coal-fired boilers below 30t / h must be forced to use gas (oil, alcohol). The cost of gas for producing 1 ton of 150℃ steam by gas boilers is 328 yuan, which is twice that of coal (180 yuan for 1 ton of steam). The current price of natural gas is 3.85 yuan per cubic meter. Using a saturated water circulation heating system, the gas cost of heating the same amount of hot water in a closed cycle is about 224 yuan, reducing costs by more than 40% (papermaking, printing, washing, printing and dyeing, medical, chemical and other fields). Using a saturated water circulation heating system can save more than 60% of gas energy consumption.

[0058] The innovative technology of circulating heating method of saturated water circulating heating system can fill the domestic technological gap. The equipment has significant energy-saving effect, can reduce energy consumption, greatly save water costs, reduce carbon emissions, and has no excess pressure, waste heat and steam trap discharge, which is beneficial to improving the environment and providing strong technical and industrial support for clean energy policies.

[0059] In the description of the present invention, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium, may be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The protection scope of the present invention is not limited to the above-mentioned specific examples. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all belong to the protection scope of the present invention.

Claims

1. A saturated water circulation heating system, characterized in that: The invention comprises a saturated water heating device and a heat exchanger, wherein the heat exchanger comprises a first container and a second container, wherein the first container is provided with a first liquid inlet pipe (3) and a first liquid discharge pipe (4), and the second container is provided with a second liquid inlet pipe (5) and a second liquid discharge pipe (6); the first container is arranged in the second container, and a heat exchange mechanism is arranged between the first container and the second container; the first liquid discharge pipe (4) is connected to the input end of the saturated water heating device, the output end of the saturated water heating device is connected to the input end of a heat-using device, and the output end of the heat-using device is connected to the first liquid inlet pipe (3); The saturated water heating device comprises a combustion chamber (19), wherein an annular heating coil (20) is arranged inside the combustion chamber (19), wherein two ends of the heating coil (20) are respectively provided with a water inlet end and a water outlet end, wherein the water inlet end of the heating coil (20) is communicated with a first liquid discharge pipe (4), and the water outlet end of the heating coil (20) is connected with an input end of a heat-using device; a combustion chamber (21) is arranged inside the heating coil (20), wherein one end of the combustion chamber (21) is provided with a burner (22) for spraying flames into the combustion chamber (21), and the other end of the combustion chamber (21) is provided with a smoke exhaust mechanism; The heating coil (20) comprises a first coil and a second coil, the first coil and the second coil are both annular, the combustion chamber (21) is arranged on the inner side of the first coil, the second coil is sleeved on the outer side of the first coil, and the second coil is connected to the first coil; the first coil comprises a plurality of first tube bodies (23) distributed in an annular shape, the second coil comprises a plurality of second tube bodies (24) distributed in an annular shape, the first tube bodies (23) and the second tube bodies (24) are staggered, the two ends of the first tube body (23) are respectively connected to two adjacent second tube bodies (24), and the two ends of the second tube body (24) are respectively connected to two adjacent first tube bodies (23); the first tube body (23) and the second tube body (24) are arranged along the length direction of the combustion chamber (21), and the first tube body (23) and the second tube body (24) are connected in series.

2. The saturated water circulation heating system according to claim 1, characterized in that: The heating coil (20) further comprises a third coil and a fourth coil, the third coil and the fourth coil are both annular, the third coil is sleeved on the outside of the second coil, and the third coil is connected to the second coil, the fourth coil is sleeved on the outside of the third coil, and the fourth coil is connected to the third coil; the third coil comprises a plurality of third tube bodies (25) distributed in an annular shape, the fourth coil comprises a plurality of fourth tube bodies (26) distributed in an annular shape, the third tube body (25) and the second tube body (24) are staggered, one of the second tube bodies (24) is connected to one of the third tube bodies (25); the fourth tube body (26) and the third tube body (25) are staggered, the two ends of the fourth tube body (26) are respectively connected to two adjacent third tube bodies (25), and the two ends of the third tube body (25) are respectively connected to two adjacent fourth tube bodies (26).

3. The saturated water circulation heating system according to claim 2, characterized in that: The heating coil (20) further comprises two supporting plates (27) arranged opposite to each other, wherein the supporting plates (27) are provided with a plurality of mounting holes, and the plurality of mounting holes are respectively matched with the first tube body (23), the second tube body (24), the third tube body (25) and the fourth tube body (26); a first U-shaped elbow (28) is connected between the end of the first tube body (23) and the end of the second tube body (24), and a second U-shaped elbow (29) is connected between the end of the third tube body (25) and the end of the fourth tube body (26).

4. The saturated water circulation heating system according to claim 3, characterized in that: The smoke exhaust mechanism comprises a smoke exhaust pipe (30), one end of the smoke exhaust pipe (30) is connected to the combustion chamber (21), the other end of the smoke exhaust pipe (30) is connected to a chimney (33), and a waste heat recovery mechanism (31) is provided on the smoke exhaust pipe (30); the waste heat recovery mechanism (31) comprises a waste heat recovery pipe for recovering waste heat of the smoke exhaust pipe (30), a cold water input end and a hot water output end are respectively provided at both ends of the waste heat recovery pipe, the cold water input end is connected to a cold water tank (32), and the hot water output end is connected to a second liquid inlet pipe (5).

5. The saturated water circulation heating system according to claim 1, characterized in that: The heat exchange mechanism comprises an annular heat exchange coil, the liquid inlet end of the heat exchange coil is connected to the first liquid inlet pipe (3), and the liquid outlet end of the heat exchange coil is connected to the interior of the first container; the liquid in the heat exchange coil moves from bottom to top, and the liquid in the second container moves from top to bottom.

6. The saturated water circulation heating system according to claim 5, characterized in that: The heat exchange coil comprises a plurality of heat exchange tubes interconnected, and the heat exchange tubes are spirally distributed on the outside of the first container; the heat exchange coil comprises three heat exchange tubes interconnected, namely a first heat exchange tube (7), a second heat exchange tube (8) and a third heat exchange tube (9); the first heat exchange tube (7) is spirally distributed on the outside of the first container, and the liquid outlet end of the first heat exchange tube (7) is connected to the inside of the first container; the second heat exchange tube (8) is spirally distributed on the outside of the first heat exchange tube (7), and the liquid outlet end of the second heat exchange tube (8) is connected to the liquid inlet end of the first heat exchange tube (7); the third heat exchange tube (9) is spirally distributed on the outside of the second heat exchange tube (8), and the liquid outlet end of the third heat exchange tube (9) is connected to the liquid inlet end of the second heat exchange tube (8), and the liquid inlet end of the third heat exchange tube (9) is connected to the first liquid inlet tube (3).

7. The saturated water circulation heating system according to claim 6, characterized in that: The heat exchange coil is provided with a support member, the support member comprising a plurality of support plates (10) for supporting the heat exchange coil, one end of the support plate (10) being connected to the outer wall of the first container.

8. The saturated water circulation heating system according to claim 6, characterized in that: The first container is provided with a first water level gauge (11), a liquid replenishing pipe (12), a temperature gauge (13), a pressure gauge (14), a safety valve (15) and an exhaust valve (16); the second container is provided with a second water level gauge (17) and an exhaust pipe (18); the first container comprises an inner tank body (1), the second container comprises an outer tank body (2), the inner tank body (1) is arranged inside the outer tank body (2), and a support frame is provided at the bottom of the outer tank body (2).

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