Residential area heat supply system based on distillation exhaust waste steam

Abstract

The invention relates to the technical field of accommodation area central heating, in particular to an accommodation area heat supply system based on distillation exhaust waste steam. The accommodation area heat supply system comprises a first heat exchanger, a second heat exchanger, a water supply pool, a high-temperature water tank and a radiator, distillation discharge waste steam is connected to a hot fluid inlet of the first heat exchanger, flows out of a hot fluid outlet of the first heat exchanger and then is connected to a hot fluid inlet of the second heat exchanger. A cold fluid inlet of the first heat exchanger is connected to the water supply pool, and a cold fluid outlet is connected to the high-temperature water tank; a cold fluid outlet of the second heat exchanger is connected to a water inlet of the radiator through a heating pipe; a cold fluid inlet is connected with a water outlet of the radiator; the radiator is used for supplying heat to the accommodation area. According to the heat supply system for the accommodation area, heat energy contained in distilled waste steam discharged outwards is recycled in a multi-stage mode, the distilled waste steam discharged outwards is fully recycled, and energy is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of centralized heating in accommodation areas, and particularly relates to a heating system for accommodation areas based on distillation exhaust waste steam. Background Art

[0002] In many industries (such as brewing, papermaking, sugar making, textile industries, etc.), a large amount of high-temperature steam is generated during the production process in the factory area. This high-temperature steam contains a large amount of thermal energy. If it is directly discharged into the environment, it will cause a large amount of thermal energy loss, resulting in energy waste, and will also cause the temperature near the factory building to be too high, damaging the ecological environment around the factory area.

[0003] Among them, in the white liquor distillation process, the high-temperature waste steam is mainly produced from the acid discharge or grain steaming process that continues after the tail liquor distillation is completed. This process continuously discharges a large amount of high-temperature steam to the outside. These high-temperature waste steams usually contain various fermentation products such as acids and aldehydes, as well as dust particles. If these waste steams are directly discharged, the waste steams will form condensed water over the workshop and fall back into the fermented grains that are being spread out and piled up for saccharification and other processes on the workshop floor, causing pollution to the fermented grains and directly affecting the quality of the produced liquor. In addition, the acidic substances in the condensed water exacerbate the corrosion and aging of the factory building and equipment.

[0004] In the prior art, these high-temperature steams produced in the factory area are usually centrally recovered, and then the thermal energy contained in these high-temperature steams is recovered through heat exchange equipment and used for purposes such as heating in accommodation areas.

[0005] However, the existing thermal energy recovery heating system based on waste steam is usually single-stage recovery, and the heat recovery efficiency is low. Summary of the Invention

[0006] The purpose of the present invention is to provide a heating system for accommodation areas based on distillation exhaust waste steam. By performing multi-stage recovery and utilization of the thermal energy contained in the distillation exhaust waste steam, the distillation exhaust waste steam is fully recovered and utilized, saving energy.

[0007] The present invention provides a heating system for accommodation areas based on distillation exhaust waste steam. The distillation exhaust waste steam comes from the distillation processing system in the factory area; the heating system for the accommodation area includes a first heat exchanger, a second heat exchanger, a water supply tank, a high-temperature water tank located in the factory area, and a radiator located in the accommodation area; the distillation exhaust waste steam is connected to the hot fluid inlet of the first heat exchanger and flows out from the hot fluid outlet of the first heat exchanger and then is connected to the hot fluid inlet of the second heat exchanger; the cold fluid inlet of the first heat exchanger is connected to the water supply tank, and the cold fluid outlet is connected to the high-temperature water tank; the cold fluid outlet of the second heat exchanger is connected to the water inlet of the radiator through a heating pipe, and the cold fluid inlet is connected to the water outlet of the radiator; the radiator is used to heat the accommodation area.

[0008] Further, the heating system for the accommodation area further includes a water softener, which is used to soften natural water to obtain softened water and input it into the water supply tank; the cold fluid in the second heat exchanger is softened water.

[0009] Further, a shower room is provided in the accommodation area, and a four-way valve is provided in the shower room. The four-way valve includes a first interface, a second interface, a third interface, and a fourth interface; the water outlet is connected to the first interface, the second interface is connected to the cold fluid inlet of the second heat exchanger; the water supply tank is connected to the third interface, and the fourth interface is connected to a shower head; by operating the valve stem of the four-way valve, the four-way valve can be switched between a first state and a second state; in the first state, the first interface is communicated with the second interface, and the third interface and the fourth interface are closed; in the second state, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface.

[0010] Further, a flow meter is provided on the pipeline where the water supply tank is connected to the third interface, a variable-frequency pump is also connected to the pipeline connecting the first heat exchanger to the water supply tank, a water pump is connected to the heating pipe, and a temperature sensor is provided in the water supply tank; the heating system for the accommodation area further includes a control terminal electrically connected to the flow meter, the variable-frequency pump, and the temperature sensor; when the four-way valve is in the first state, the control terminal controls the variable-frequency pump to supply softened water to the first heat exchanger at an initial flow rate; when the four-way valve is in the second state, the control terminal controls the variable-frequency pump to supply softened water to the first heat exchanger at a second flow rate in response to the measurement result of the flow meter and the temperature of the softened water in the water supply tank detected by the temperature sensor.

[0011] Further, the difference between the initial flow rate and the second flow rate is obtained according to the following method: , wherein, ∆q is the difference between the initial flow rate and the second flow rate, q 1 is the measurement result of the flow meter, T 1 is the preset inflow temperature of the cold fluid inlet of the second heat exchanger, T 3 is the temperature of the softened water in the water supply tank, T 4 is the preset outflow temperature of the cold fluid outlet of the first heat exchanger.

[0012] Furthermore, the hot fluid outlet of the first heat exchanger is lower than the hot fluid inlet, and the hot fluid outlet of the second heat exchanger is lower than the hot fluid inlet. The pipeline connecting the hot fluid outlet of the first heat exchanger to the hot fluid inlet of the second heat exchanger gradually sinks from both ends to the middle, and a float valve is installed at the lowest point of this pipeline; the float valve includes a housing and a floating ball, the floating ball is slidably arranged vertically in the housing, and a drain port is arranged at the bottom of the housing; when the floating ball floats, the drain port is opened, and when the floating ball sinks, the drain port is closed.

[0013] Furthermore, the heating system of this accommodation area further includes a condenser; the hot fluid outlet of the second heat exchanger and the drain port are both connected to the hot fluid pipe of the condenser; one end of the cold fluid channel of the condenser is connected to the water supply tank, and the other end is connected to the cold fluid inlet of the first heat exchanger.

[0014] Furthermore, an impeller is installed inside one end of the heating pipe close to the radiator, the shaft rod of the impeller is perpendicular to the axis of the heating pipe and extends to the outside of the heating pipe; the radiator includes a fixedly installed bracket, a heat dissipation pipeline, and fan blades rotatably installed on the bracket; the air outlet side of the fan blades faces the heat dissipation pipeline; the shaft rod and the rotating shaft of the fan blades are parallel, and the shaft rod drives the fan blades to rotate through a chain drive.

[0015] Furthermore, the radiator further includes a dust-proof cover fixedly connected to the bracket, and the fan blades are located between the dust-proof cover and the heat dissipation pipeline.

[0016] Furthermore, the radiator further includes a back cover and a water filter; the back cover is fixedly connected to the bracket and is located on the air suction side of the fan blades, the concave side of the back cover faces the fan blades, and a chamber is formed between the back cover and the fan blades; the water filter includes a filter housing and an air inlet pipe, water is contained in the filter housing, one end of the air inlet pipe is located outside the filter housing, and the other end passes through the wall of the filter housing and is inserted into the water; a connection port is arranged on the wall of the filter housing above the internal water level, and the side of the back cover away from the fan blades is connected to the connection port through a connecting pipe.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. A heating system for an accommodation area based on distilling and discharging waste steam provided by an embodiment of the present disclosure successively passes waste steam through a first heat exchanger and a second heat exchanger, multi-stage utilizes the heat energy contained in the waste steam, enables the waste steam to fully exchange heat and condense in the two-stage heat exchanger to release heat energy, and then can utilize the heat energy contained in the waste steam for air outlet; 2. A heating system for accommodation areas based on distilling and discharging waste steam. The hot water delivered by the second heat exchanger to the radiator, in addition to being used for heating the accommodation areas, after flowing out from the water outlet of the radiator, can also be used for the bathing of the employees in the accommodation areas. Accordingly, the water used for the employees' bathing does not need to flow back to the second heat exchanger, avoiding heat loss during the process of being transported back to the heat exchanger. Correspondingly, by controlling the frequency conversion pump to adjust the flow rate of the soft water supplied to the first heat exchanger, when the hot water flowing out from the water outlet of the radiator is used for the employees' bathing, the outlet temperature of the second heat exchanger can still be maintained at a preset temperature, thus not affecting the heating effect of the accommodation areas. 3. A heating system for accommodation areas based on distilling and discharging waste steam. The water flow in the heating pipe drives the impeller to rotate, and then the rotating shaft drives the fan blades to rotate. There is no need to set up a circuit near the radiator. Compared with the traditional electric-driven fan used to blow the heat dissipation pipeline, even if the radiator leaks, it will not cause a short circuit or electric shock accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not limit the embodiments of the present invention. In the drawings: Figure 1 It is a schematic diagram of the pipeline connection of a heating system for accommodation areas based on distilling and discharging waste steam drawn according to an embodiment of the present invention; Figure 2 It is a cross-sectional view of a four-way valve drawn according to an embodiment of the present invention; Figure 3 According to Figure 1 The partial enlarged view of area A drawn; Figure 4 It is a three-dimensional structure diagram of a condenser drawn according to an embodiment of the present invention; Figure 5 It is a three-dimensional structure diagram of a radiator drawn according to an embodiment of the present invention; Figure 6 According to Figure 5 The partial enlarged view of area B drawn; Figure 7 According to Figure 5 The cross-sectional view of this radiator drawn; Figure 8 It is another three-dimensional structure diagram of a radiator drawn according to an embodiment of the present invention; Figure 9 It is a cross-sectional view of a water filter drawn according to an embodiment of the present invention.

[0019] Marks in the drawings and corresponding component names: 11 - Distillation processing system; 12 - First heat exchanger; 121 - Variable - frequency pump; 13 - Second heat exchanger; 131 - Heating pipe; 132 - Water pump; 14 - Water supply tank; 15 - High - temperature water tank; 16 - Condenser; 161 - Hot fluid pipe; 162 - Cold fluid channel; 17 - Water softener; 2 - Radiator; 21 - Inlet; 22 - Outlet; 23 - Impeller; 24 - Shaft rod; 25 - Bracket; 26 - Heat dissipation pipeline; 27 - Fan blade; 28 - Dust cover; 29 - Rear cover; 41 - First interface; 42 - Second interface; 43 - Third interface; 44 - Fourth interface; 45 - Valve rod; 51 - Housing; 52 - Float ball; 53 - Drain outlet; 61 - Filter housing; 611 - Cover body; 612 - Barrel body; 62 - Air inlet pipe; 63 - Connection port; 64 - Connecting pipe; 71 - Sprocket; 72 - Chain; 73 - Air deflector. Detailed implementation mode

[0020] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with embodiments and drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and do not limit the present invention. It should be noted that the present invention has been in the actual R & D and use stage.

[0021] In many industries (such as brewing, papermaking, sugar - making, textile industries, etc.), a large amount of high - temperature steam is generated during the production process in the factory area. This high - temperature steam contains a large amount of thermal energy. If it is directly discharged into the environment, it will cause a large amount of thermal energy loss, resulting in energy waste, and will also cause the temperature near the factory building to be too high, damaging the ecological environment around the factory area.

[0022] Among them, in the liquor distillation process, the high - temperature waste steam is mainly produced in the acid - discharging or grain - steaming process that continues after the tail - liquor distillation is completed. This process continuously discharges a large amount of high - temperature steam. These high - temperature waste steams usually contain various fermentation products such as acids and aldehydes, as well as dust particles. If these waste steams are directly discharged, the waste steams will form condensed water over the workshop and fall back into the fermented grains that are undergoing processes such as spreading out and piling up for saccharification on the workshop floor, causing pollution to the fermented grains and directly affecting the quality of the produced liquor. In addition, the acidic substances in the condensed water exacerbate the corrosion and aging of the factory building and equipment.

[0023] In the prior art, these high - temperature steams produced in the factory area are usually centrally recovered, and then the thermal energy contained in these high - temperature steams is recovered through heat - exchange equipment and used for purposes such as heating in the accommodation area (usually, when the heating demand is met, there is still a large surplus, and this surplus thermal energy can be used to heat the production water for washing raw materials, utensils, etc.).

[0024] However, existing waste steam-based heat energy recovery heating systems are usually single-stage recovery systems, with low heat recovery efficiency and a large amount of heat energy still being lost. For this reason, this embodiment provides a heating system for accommodation areas based on distilled waste steam, which achieves the purpose of saving energy and avoiding raw material pollution in the factory area by multi-stage recovery and utilization of the heat energy contained in the waste steam generated by the liquor distillation process.

[0025] Embodiment 1: As Figure 1 shown, this embodiment provides a heating system for accommodation areas based on distilled waste steam. The distilled waste steam comes from the distillation processing system 11 in the factory area. The heating system for accommodation areas includes a first heat exchanger 12, a second heat exchanger 13, a water supply tank 14, a high-temperature water tank 15 located in the factory area, and a radiator 2 located in the accommodation area. The distilled waste steam is connected to the hot fluid inlet of the first heat exchanger 12 and flows out from the hot fluid outlet of the first heat exchanger 12 and then is connected to the hot fluid inlet of the second heat exchanger 13. The cold fluid inlet of the first heat exchanger 12 is connected to the water supply tank 14, and the cold fluid outlet is connected to the high-temperature water tank 15. The cold fluid outlet of the second heat exchanger 13 is connected to the water inlet 21 of the radiator 2 through a heating pipe 131, and the cold fluid inlet is connected to the water outlet 22 of the radiator 2. The radiator 2 is used to heat the accommodation area.

[0026] It should be understood that the flow rate of the distilled waste steam input to the first heat exchanger 12 is stable (for example, by setting a pressure stabilizing tank or a regulating valve on the pipeline where the distilled waste steam is input to the first heat exchanger 12. Implementing pipeline steam flow stability by setting a pressure stabilizing tank or a regulating valve is prior art and will not be elaborated further).

[0027] Based on this, the heating system for accommodation areas based on distilled waste steam provided in this embodiment passes the waste steam through the first heat exchanger 12 and the second heat exchanger 13 in sequence, and multi-stage utilizes the heat energy contained in the waste steam, enabling the waste steam to fully exchange heat and condense in the two-stage heat exchanger to release heat energy. The released heat energy can heat the cold fluid in the second heat exchanger 13 to a preset outlet temperature and discharge it from the cold fluid outlet. The heated cold fluid is discharged and then transported to the radiator 2 in the accommodation area through the heating pipe 131 for heating the accommodation area. Heat energy is released during the heating process (meanwhile, the temperature of the heated cold fluid decreases), and then it is transported back to the cold fluid inlet of the second heat exchanger 13 to be heated again.

[0028] It should be understood that for a given accommodation area, its heating demand is determined, which determines the thermal energy contained in the heated cold fluid output by the second heat exchanger 13 when it reaches the accommodation area. In this regard, the flow rate and outlet temperature of the heated cold fluid output by the second heat exchanger 13 are usually preset in advance, so as to keep the temperature constant when it reaches the water inlet 21 of the radiator 2, making the thermal energy required by the second heat exchanger 13 constant. Correspondingly, by adjusting the flow rate of the cold fluid in the first heat exchanger 12, a part of the waste steam is condensed and releases heat in the first heat exchanger 12, and the remaining part is transported to the second heat exchanger 13 for condensation and heat release to heat the cold fluid with a preset flow rate in the second heat exchanger 13 to the preset outlet temperature. Obviously, as the external air temperature changes, the heating demand of the accommodation area changes. Correspondingly, it is necessary to adjust the flow rate and outlet temperature of the heated cold fluid output by the second heat exchanger 13 in advance, that is, to adjust the thermal energy required by the second heat exchanger 13. For this, by adjusting the flow rate of the cold fluid in the first heat exchanger 12, the thermal energy removed by the first heat exchanger 12 can be changed, so that the thermal energy contained in the steam entering the second heat exchanger 13 matches the adjusted thermal energy demand of the second heat exchanger 13.

[0029] Preferably, the outer part of the heating pipe (131) for transporting the cold fluid of the second heat exchanger 13 to the radiator 2 and the pipeline for transporting the cold fluid of the radiator 2 back to the second heat exchanger 13 are both coated with heat insulation layers, thereby reducing the heat energy loss during the fluid transportation between the second heat exchanger 13 and the radiator 2.

[0030] Preferably, the outlet temperature of the cold fluid of the first heat exchanger 12 is greater than 95 °C, and the outlet temperature of the cold fluid of the second heat exchanger 13 is 60 - 70 °C. The high-temperature water output by the first heat exchanger 12 can be used to supplement the distillation bottom pot water, soak grains, clean the machinery, etc. Using the high-temperature water heated to above 95 °C to supplement the distillation bottom pot water, since its temperature is close to the boiling point, compared with directly adding cold water, it avoids the sudden drop in the temperature of the distillation bottom pot water, is conducive to the stable production of steam by the distillation bottom pot, and reduces the change in the boiler load caused by water replenishment.

[0031] Preferably, the heating system of the accommodation area further includes a water softener 17, and the water softener 17 is used to soften natural water to obtain softened water and input it into the water supply tank 14; the cold fluid in the second heat exchanger 13 is softened water.

[0032] Accordingly, the soft water can be heated to a temperature above 95°C in the first heat exchanger 12 without forming scale, thereby avoiding the reduction or even blockage of the heat exchange efficiency of the cold fluid pipeline of the first heat exchanger 12 due to scale formation, which is beneficial to maintaining the long-term stable operation of the system. In addition, using the soft water heated to a temperature above 95°C to supplement the bottom water of the still can prevent the still processing system 11 from scaling. Similarly, although the output temperature of the cold fluid of the second heat exchanger 13 is relatively low, the cold fluid circulates between the second heat exchanger 13 and the radiator 2 for a long time and multiple times. The cold fluid will be repeatedly heated by the second heat exchanger 13. Using soft water as the cold fluid in the second heat exchanger 13 will not form scale even if it is heated multiple times.

[0033] Embodiment 2: As Figure 2 shown, this embodiment is based on Embodiment 1. The difference is that in this embodiment, a shower room is provided in the accommodation area, and a four-way valve is provided in the shower room. The four-way valve includes a first interface 41, a second interface 42, a third interface 43, and a fourth interface 44; The water outlet 22 is connected to the first interface 41, and the second interface 42 is connected to the cold fluid inlet of the second heat exchanger 13; the water supply tank 14 is connected to the third interface 43, and the fourth interface 44 is connected to the shower head; By operating the valve stem 45 of the four-way valve, the four-way valve can be switched between a first state and a second state; In the first state, the first interface 41 is communicated with the second interface 42, and the third interface 43 and the fourth interface 44 are closed (as Figure 2 shown, the valve stem 45 rotates until the valve core is in the solid line position); in the second state, the first interface 41 is communicated with the fourth interface 44, and the second interface 42 is communicated with the third interface 43 (as Figure 2 shown, the valve stem 45 rotates until the valve core is in the dotted line position).

[0034] Preferably, a flow meter is provided on the pipeline connecting the water supply tank 14 to the third interface 43. A variable frequency pump 121 is also connected to the pipeline connecting the first heat exchanger 12 to the water supply tank 14. A water pump 132 is connected to the heating pipe 131. A temperature sensor is provided in the water supply tank 14; Accordingly, in a heating system for accommodation areas based on distilling and discharging waste steam provided in this embodiment, the hot water delivered by the second heat exchanger 13 to the radiator 2, in addition to being used for heating the accommodation areas, after flowing out from the water outlet 22 of the radiator 2, can also be used for the employees in the accommodation areas to take showers (that is, when in normal heating, the four-way valve is in the first state, and the hot water for heating circulates between the radiator 2 and the second heat exchanger 13 under the action of the water pump 132; when the employees take showers, the valve stem 45 of the four-way valve is operated to switch the four-way valve to the second state, and part of the hot water returned to the second heat exchanger 13 flows out from the fourth interface 44 to the shower head. Under the action of the water pump 132, negative pressure is generated at the second interface 42, and the negative pressure attraction causes the soft water in the water supply tank 14 to flow through the four-way valve and supplement the cold fluid inlet of the second heat exchanger 13. Obviously, the amount of soft water supplemented by negative pressure attraction is equal to the amount of hot water used for taking showers). Accordingly, the water used for the employees to take showers does not need to flow back to the second heat exchanger 13, avoiding heat loss during the process of being transported back to the heat exchanger. It should be understood that the temperature of the hot water used for heating the accommodation areas usually drops by about 10°C after dissipating heat in the radiator 2, so that the temperature of the hot water flowing out from the radiator 2 reaches the water temperature required for taking showers (usually greater than 40°C).

[0035] Obviously, after the hot water discharged from the water outlet 22 of the radiator 2 is used for the employees to take showers, the temperature of the water body returned to the cold fluid inlet of the second heat exchanger 13 drops significantly compared with the original returned water body temperature (the water body temperature of the mixed water supply tank 14 is relatively low). In order to maintain the cold fluid outlet temperature of the second heat exchanger 13, the second heat exchanger 13 requires more heat energy input.

[0036] Therefore, in this embodiment, the heating system for the accommodation areas further includes a control terminal electrically connected to the flow meter, the variable frequency pump 121, and the temperature sensor; When the four-way valve is in the first state, the control terminal controls the variable frequency pump 121 to supply soft water to the first heat exchanger 12 at an initial flow rate; when the four-way valve is in the second state, the control terminal controls the variable frequency pump 121 to supply soft water to the first heat exchanger 12 at a second flow rate in response to the measurement result of the flow meter and the soft water temperature in the water supply tank 14 detected by the temperature sensor; Specifically, the difference between the initial flow rate and the second flow rate is obtained according to the following method: , wherein, ∆q is the difference between the initial flow rate and the second flow rate, q 1 is the measurement result of the flow meter, T 1 is the preset inflow temperature of the cold fluid inlet of the second heat exchanger, T3 is the soft water temperature in the water supply tank, T 4 is the preset outflow temperature at the cold fluid outlet of the first heat exchanger.

[0037] Accordingly, in this embodiment, the cold fluid flow rate that the first heat exchanger 12 needs to reduce is obtained through the above method, and then the cold fluid flow rate input to the first heat exchanger 12 is adjusted accordingly, so that the proportion of waste steam condensed in the first heat exchanger 12 is reduced. Furthermore, more waste steam enters the second heat exchanger 13 for condensation, releasing sufficient heat energy to heat the return water body with a significantly lower temperature compared to the water body originally returned to the cold fluid inlet of the second heat exchanger 13 to the preset cold fluid outlet temperature of the second heat exchanger 13. Accordingly, when the hot water discharged from the outlet 22 of the radiator 2 is used for employees' bathing, the heating effect of the accommodation area is not affected.

[0038] Embodiment 3: As Figure 3 , Figure 4 shown, this embodiment is based on Embodiment 1. The difference is that in this embodiment, the hot fluid outlet of the first heat exchanger 12 is lower than the hot fluid inlet, the hot fluid outlet of the second heat exchanger 13 is lower than the hot fluid inlet, and the pipeline connecting the hot fluid outlet of the first heat exchanger 12 to the hot fluid inlet of the second heat exchanger 13 gradually sinks from both ends to the middle, and a float valve is installed at the lowest point of this pipeline; The float valve includes a housing 51 and a float 52. The float 52 is slidably arranged in the housing 51 in the vertical direction, and a drain port 53 is provided at the bottom of the housing 51; when the float 52 floats, the drain port 53 is opened, and when the float 52 sinks, the drain port 53 is closed.

[0039] Thus, the condensed water generated by the condensation of waste steam in the first heat exchanger 12 and the second heat exchanger 13 can be smoothly discharged from the hot fluid outlet, thereby avoiding the poor circulation of waste steam caused by the accumulation of condensed water in the hot fluid channels of the first heat exchanger 12 and the second heat exchanger 13, and even the occurrence of water hammer phenomenon. The pipeline connecting the hot fluid outlet of the first heat exchanger 12 to the hot fluid inlet of the second heat exchanger 13 gradually sinks from both ends to the middle, and a float valve is installed at the lowest point of this pipeline, which can discharge the condensed water in this pipeline while avoiding the leakage of waste steam. Obviously, the condensed water can flow from above the float 52 slidably arranged in the housing 51 in the vertical direction to below.

[0040] Preferably, the heating system of this accommodation area further includes a condenser 16, and the hot fluid outlet of the second heat exchanger 13 and the drain port 53 are both connected to the hot fluid pipe 161 of the condenser 16; One end of the cold fluid channel 162 of the condenser 16 is connected to the water supply tank 14, and the other end is connected to the cold fluid inlet of the first heat exchanger 12.

[0041] Thus, the condensed water output by the first heat exchanger 12 and the second heat exchanger 13 can be used to preheat the soft water input to the first heat exchanger 12, thereby further improving the utilization rate of the thermal energy contained in the distilled and discharged waste steam.

[0042] Preferably, the condenser 16 is a serpentine condenser 16 (as Figure 4 shown), its hot fluid pipe 161 is spiral, and a tubular cold fluid channel 162 is sleeved outside the spiral hot fluid pipe 161. The condenser 16 is placed horizontally at a position lower than the drain port 53 and the hot fluid outlet of the second heat exchanger 13. Thus, the condensed water discharged from the drain port 53 and the hot fluid outlet of the second heat exchanger 13 can enter the spiral hot fluid pipe 161 under the action of gravity and fully exchange heat with the soft water entering the cold fluid channel 162 of the condenser 16.

[0043] Example 4: As Figures 5 to 7 shown, this example is based on Example 1, the difference is that in this example, an impeller 23 is installed inside one end of the heating pipe 131 close to the radiator 2, and the shaft rod 24 of the impeller 23 is perpendicular to the axis of the heating pipe 131 and extends to the outside of the heating pipe 131; The radiator 2 includes a fixedly installed bracket 25, a heat dissipation pipeline 26, and fan blades 27 rotatably installed on the bracket 25; The air outlet side of the fan blades 27 faces the heat dissipation pipeline 26; The shaft rod 24 and the rotating shaft of the fan blades 27 are parallel, and the shaft rod 24 drives the fan blades 27 to rotate through chain drive.

[0044] Specifically, as Figure 5 , Figure 6 , Figure 8 shown, a sprocket 71 is fixedly installed on the shaft rod 24 and the rotating shaft of the fan blades 27 respectively, and a chain 72 is installed on the two sprockets 71. Preferably, the sprocket 71 on the shaft rod 24 is smaller than the sprocket 71 on the rotating shaft of the fan blades 27 (specifically, the number of teeth of the sprocket 71 on the shaft rod 24 is less than the number of teeth of the sprocket 71 on the rotating shaft of the fan blades 27). Thus, using the sprocket 71 with fewer teeth as the driving wheel can make the fan blades 27 easier to be driven.

[0045] It should be understood that the main function of the fan blade 27 is to promote the air circulation at the heat dissipation pipeline 26 by rotation, blow out the hot air at the position of the heat dissipation pipeline 26, and at the same time blow the cold air towards the heat dissipation pipeline 26, thereby promoting the uniformity of the indoor temperature, and also making there be a large temperature difference between the heat dissipation pipeline 26 and the air near it, thus having a high heat conduction efficiency; there is a water pump 132 on the heating pipe 131 to push the water flow from the second heat exchanger 13 to the radiator 2, and the structure of the impeller 23 (such as Figure 6 shown) makes the water flow through necessarily cause the impeller 23 to rotate, and the impeller 23 is chain-driven with the fan blade 27, so the fan blade 27 will also necessarily rotate. Thus, the fan blade 27 can rotate to promote the air circulation at the heat dissipation pipeline 26. Obviously, a water pump 132 with a larger power can be set to make the fan blade 27 reach a certain rotational speed and enhance the blowing effect. In addition, the heating pipe 131 should have sufficient strength to avoid being burst by the local high pressure caused in the heating pipe 131 under the pumping action of the water pump 132.

[0046] Accordingly, through the blowing action brought by the rotation of the fan blade 27, the forced convection heat transfer between the heat dissipation pipeline 26 and the air in the preset space of the accommodation area can be realized, thereby making the temperature field distribution in the preset space more uniform and improving the heating effect. In addition, the water flow in the heating pipe 131 pushes the impeller 23 to rotate (the impeller 23 is fixedly connected to the shaft rod 24), and then the rotating shaft rod 24 is used to drive the fan blade 27 to rotate. There is no need to set up a circuit near the radiator 2. Compared with the traditional electric-driven fan used to blow the heat dissipation pipeline 26, even if the radiator 2 leaks, it will not cause a short circuit or an electric shock accident.

[0047] More preferably, the heat dissipation pipeline 26 is a copper pipe, and a plurality of heat dissipation fins (the heat dissipation fins are not drawn in the attached drawings) are arranged on one side of the heat dissipation pipeline 26 facing the fan blade 27 and / or on the side away from the fan blade 27. Thus, the heat transfer effect between the hot water inside the heat dissipation pipeline 26 and the air in the preset space can be further strengthened.

[0048] Preferably, the radiator 2 further includes a dust-proof cover 28 fixedly connected to the bracket 25, and the fan blade 27 is located between the dust-proof cover 28 and the heat dissipation pipeline 26.

[0049] Accordingly, it can be avoided that hairs, fluff, etc. in the preset space adhere to the heat dissipation pipeline 26 under the rotation of the fan blade 27, and further avoid that under the long-term "roasting" action of the heat dissipation pipeline 26, hairs, fluff, etc. will emit a burnt smell, affecting the air quality in the preset space; in addition, it also avoids that hairs, fluff, etc. adhere to the surface of the heat dissipation pipeline 26 to form an "insulating layer", thereby reducing the heat conduction between the hot water inside the heat dissipation pipeline 26 and the air in the preset space and reducing the heating effect.

[0050] Preferably, the radiator 2 further includes a plurality of air guide plates 73, which are located on the side of the heat dissipation pipeline 26 away from the fan blades 27. Each of the air guide plates 73 is arrayed along the height direction or the width direction of the radiator 2 (in the figure, each air guide plate 73 is arrayed along the height direction), and the air guide plate 73 is rotatably connected to the bracket 25.

[0051] Based on this, by manually rotating the air guide plate 73, the direction of the hot air blown out by the radiator 2 can be adjusted, so that a more comfortable heating experience can be obtained. In addition, the air guide plate 73 can also serve as a heat protection cover to prevent the user from being scalded by the relatively hot heat dissipation pipeline 26.

[0052] However, as the usage time increases, hairs, lint, etc. in the preset space will gradually adhere to the windproof cover, affecting the passage of gas and being difficult to clean. For this reason, as Figure 8 , Figure 9 shown, in another specific practice of this embodiment, the radiator 2 further includes a back cover 29 and a water filter; the back cover 29 and the water filter are used to replace the dust-proof cover 28, specifically: The back cover 29 is fixedly connected to the bracket 25 and is located on the suction side of the fan blades 27. The concave side of the back cover 29 faces the fan blades 27, and a chamber is formed between the back cover 29 and the fan blades 27; The water filter includes a filter housing 61 and an air inlet pipe 62. Water is contained in the filter housing 61. One end of the air inlet pipe 62 is located outside the filter housing 61, and the other end passes through the wall of the filter housing 61 and is inserted into the water; A connection port 63 is provided on the wall of the filter housing 61 above the internal water level. The side of the back cover 29 away from the fan blades 27 is connected to the connection port 63 through a connecting pipe 64.

[0053] It can be understood that the end of the air inlet pipe 62 located outside the filter housing 61 is higher than the liquid level in the filter housing 61. The filter housing 61 includes a cover body 611 and a barrel body 612, and the cover body 611 and the barrel body 612 are threadedly connected (the connection is airtight after connection). The cover body 611 is fixedly connected to the bracket 25, and the air inlet pipe 62 and the connection port 63 are both provided on the cover body 611. Accordingly, when it is necessary to replace the water in the filter housing 61, the barrel body 612 and the cover body 611 are separated, and then the water in the barrel body 612 is replaced.

[0054] Under the action of the rotation of the fan blade 27, a negative pressure is generated in the chamber between the back cover 29 and the fan blade 27, so that the air in the preset space enters the water body in the filter housing 61 through the air inlet pipe 62, and after being filtered by the water body, it enters the chamber through the connecting pipe 64. Thus, the air blown to the heat dissipation pipeline 26 is pre-filtered by the water filter, which can prevent hairs and lint in the preset space from adhering to the heat dissipation pipeline 26, and compared with regularly cleaning the dust cover 28, cleaning the water filter is simpler, and only the water body in the water filter needs to be replaced.

[0055] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heating system for accommodation areas based on distillation of discharged waste steam, where the distillation of discharged waste steam comes from the distillation processing system (11) of the factory area; characterized in that, The heating system for the accommodation area includes a first heat exchanger (12), a second heat exchanger (13), a water supply tank (14), a high-temperature water tank (15) located in the factory area, and a radiator (2) located in the accommodation area; The distilled waste steam discharged is connected to the hot fluid inlet of the first heat exchanger (12), and after flowing out from the hot fluid outlet of the first heat exchanger (12), it is connected to the hot fluid inlet of the second heat exchanger (13); The cold fluid inlet of the first heat exchanger (12) is connected to the water supply tank (14), and the cold fluid outlet is connected to the high-temperature water tank (15); The cold fluid outlet of the second heat exchanger (13) is connected to the water inlet (21) of the radiator (2) through a heating pipe (131), and the cold fluid inlet is connected to the water outlet (22) of the radiator (2); The radiator (2) is used to heat the accommodation area.

2. The heating system for the accommodation area according to claim 1, characterized in that the heating system for the accommodation area further includes a water softener (17), and the water softener (17) is used to soften natural water to obtain softened water and input it into the water supply tank (14); the cold fluid in the second heat exchanger (13) is softened water.

3. The heating system for the accommodation area according to claim 2, characterized in that a shower room is provided in the accommodation area, and a four-way valve is provided in the shower room. The four-way valve includes a first interface (41), a second interface (42), a third interface (43) and a fourth interface (44); the water outlet (22) is connected to the first interface (41), the second interface (42) is connected to the cold fluid inlet of the second heat exchanger (13); the water supply tank (14) is connected to the third interface (43), and the fourth interface (44) is connected to a shower head; by operating the valve stem (45) of the four-way valve, the four-way valve can be switched between a first state and a second state; in the first state, the first interface (41) is communicated with the second interface (42), and the third interface (43) and the fourth interface (44) are closed; in the second state, the first interface (41) is communicated with the fourth interface (44), and the second interface (42) is communicated with the third interface (43).

4. The heating system for the accommodation area according to claim 3, characterized in that a flow meter is provided on the pipeline where the water supply tank (14) is connected to the third interface (43), a variable-frequency pump (121) is also connected to the pipeline where the first heat exchanger (12) is connected to the water supply tank (14), a water pump (132) is connected to the heating pipe (131), and a temperature sensor is provided in the water supply tank (14); the heating system for the accommodation area further includes a control terminal electrically connected to the flow meter, the variable-frequency pump (121), and the temperature sensor; When the four-way valve is in the first state, the control terminal controls the variable-frequency pump (121) to supply soft water to the first heat exchanger (12) at an initial flow rate; when the four-way valve is in the second state, the control terminal controls the variable-frequency pump (121) to supply soft water to the first heat exchanger (12) at a second flow rate in response to the measurement result of the flow meter and the temperature of the soft water in the water supply tank (14) detected by the temperature sensor.

5. The heating system for accommodation areas according to claim 4, wherein The difference between the initial flow rate and the second flow rate is obtained in the following manner: ， wherein, ∆q is the difference between the initial flow rate and the second flow rate, q 1 is the measurement result of the flowmeter, T 1 is the preset inflow temperature at the cold fluid inlet of the second heat exchanger, T 3 is the soft water temperature in the water supply tank, T 4 is the preset outflow temperature at the cold fluid outlet of the first heat exchanger.

6. The heating system for accommodation areas according to claim 1, wherein The hot fluid outlet of the first heat exchanger (12) is lower than the hot fluid inlet, the hot fluid outlet of the second heat exchanger (13) is lower than the hot fluid inlet, and the pipeline connecting the hot fluid outlet of the first heat exchanger (12) to the hot fluid inlet of the second heat exchanger (13) gradually sinks from both ends to the middle, and a float valve is installed at the lowest point of this pipeline; The float valve includes a housing (51) and a floating ball (52), the floating ball (52) is slidably arranged vertically in the housing (51), and a drain port (53) is arranged at the bottom of the housing (51); when the floating ball (52) floats, the drain port (53) is opened, and when the floating ball (52) sinks, the drain port (53) is closed.

7. The heating system for the accommodation area according to claim 6, characterized in that, It further includes a condenser (16); The hot fluid outlet of the second heat exchanger (13) and the drain port (53) are both connected to the hot fluid pipe (161) of the condenser (16); One end of the cold fluid channel (162) of the condenser (16) is connected to the water supply tank (14), and the other end is connected to the cold fluid inlet of the first heat exchanger (12).

8. The heating system for accommodation areas according to claim 1, wherein An impeller (23) is installed inside one end of the heating pipe (131) close to the radiator (2), and the shaft rod (24) of the impeller (23) is perpendicular to the axis of the heating pipe (131) and extends outside the heating pipe (131); The radiator (2) includes a fixedly installed bracket (25), a heat dissipation pipeline (26), and fan blades (27) rotatably installed on the bracket (25); The air outlet side of the fan blades (27) faces the heat dissipation pipeline (26); The shaft rod (24) and the rotating shaft of the fan blades (27) are parallel, and the shaft rod (24) drives the fan blades (27) to rotate through chain drive.

9. The heating system for accommodation areas according to claim 8, wherein The radiator (2) further includes a dust-proof cover (28) fixedly connected to the bracket (25), and the fan blades (27) are located between the dust-proof cover (28) and the heat dissipation pipeline (26).

10. The heating system for accommodation areas according to claim 8, wherein The radiator (2) further includes a back cover (29) and a water filter; The back cover (29) is fixedly connected to the bracket (25) and is located on the suction side of the fan blade (27). The concave side of the back cover (29) faces the fan blade (27), and a chamber is formed between the back cover (29) and the fan blade (27). The water filter includes a filter housing (61) and an intake pipe (62). Water is contained in the filter housing (61). One end of the intake pipe (62) is located outside the filter housing (61), and the other end passes through the wall of the filter housing (61) and is inserted into the water. A connection port (63) is provided on the wall of the filter housing (61) above the internal water level. One side of the back cover (29) away from the fan blade (27) is connected to the connection port (63) through a connecting pipe (64).

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