Mixed heat supply device suitable for low-temperature flash evaporation system
By designing a hybrid heating device that combines auxiliary steam and a heat transfer medium water heat exchanger, the problem of water and steam not being able to be used simultaneously in a low-temperature flash evaporation system is solved, simplifying the device and making full use of energy, thus reducing costs.
Patent Information
- Application Number
- CN202422662168.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-10-31
AI Technical Summary
In low-temperature flash evaporation systems, auxiliary steam and water vapor generated by low-temperature flash evaporation cannot be used simultaneously, resulting in complex equipment structure, complicated operation, energy waste, and high cost.
Design a hybrid heating device that combines an auxiliary steam unit and a heat transfer medium water unit. The auxiliary steam generates water vapor in the auxiliary steam heat exchanger, and the water vapor generated in the heat transfer medium water heat exchanger is transported in the same pipeline to achieve simultaneous use.
It enables the simultaneous use of auxiliary steam and low-temperature flash steam, simplifies the device structure, reduces frequent switching operations, lowers costs, and ensures full utilization of the heat transfer medium water energy.
Smart Images
Figure CN223677854U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of heat supply, concretely relates to a mixed heat supply device suitable for low temperature flash system. BACKGROUND
[0002] Low temperature flash is a kind of technology that utilizes pressure and temperature change to evaporate water quickly to obtain water vapor with certain temperature, is widely applied to chemical industry, environmental protection, energy recovery and other fields, when carrying out low temperature flash, the air pressure in the whole system needs to be reduced to reduce the boiling point of water, so at this time, only relatively lower temperature is needed to make water boil to produce water vapor.For some factories that exist recoverable waste heat, further energy saving can be realized by utilizing recovered waste heat, when recovering waste heat, water needs to be heated to form heat medium water first, then the heat medium water is used as heat source to produce steam by low temperature flash technology.But the production of water vapor depends on waste heat, when the amount of needed water vapor is more than the water vapor that waste heat can produce, the problem of water vapor deficiency will be caused, at this time, additional auxiliary steam needs to be used for supplement, but the water vapor obtained by low temperature flash is in negative pressure state, after the auxiliary steam is reduced in temperature and pressure, the pressure is still greater than that of the water vapor obtained by low temperature flash, if the auxiliary steam and water vapor are guided to the use position by the same pipeline, the equipment at the use position will first draw the auxiliary steam and cannot utilize the water vapor produced by low temperature flash due to the pressure difference between the auxiliary steam and water vapor, so the current auxiliary steam and water vapor produced by low temperature flash are transported to the use position by two systems respectively, which undoubtedly will lead to the complex structure of the whole device.
[0003] Secondly, based on the above reasons, only auxiliary steam or water vapor produced by low temperature flash can be selected at the same time, if water vapor produced by low temperature flash is mainly used, auxiliary steam needs to be replaced in time when water vapor is insufficient, and new water vapor produced by low temperature flash needs to be switched back to the water vapor side, so that frequent adjustment is needed, and the operation is complex.If auxiliary steam is mainly used, the water vapor produced by low temperature flash will not be fully utilized, a large amount of energy will be wasted, and the cost of using auxiliary steam is more than several times the cost of heat medium water heat exchange low temperature flash, so using auxiliary steam mainly will lead to higher overall cost. UTILITY MODEL CONTENTS
[0004] The utility model intends to provide a mixed heat supply device suitable for low temperature flash system to solve the problem that water vapor produced by low temperature flash and auxiliary steam cannot be used at the same time.
[0005] To achieve the above object, the utility model discloses the following technical scheme: a kind of mixed heat supply device suitable for low-temperature flash system, including heat medium water unit and steam outlet pipe, heat medium water unit includes heat medium water heat exchanger, the liquid inlet of heat medium water heat exchanger is communicated with heat medium water liquid inlet pipe, still be equipped with auxiliary steam unit, auxiliary steam unit includes auxiliary steam heat exchanger, auxiliary steam inlet pipe, auxiliary steam heat exchanger is equipped with heat source inlet, and auxiliary steam inlet pipe is communicated with heat source inlet;Heat medium water heat exchanger and auxiliary steam heat exchanger are equipped with steam outlet, two steam outlets are communicated with steam outlet pipe, and steam outlet pipe is communicated with vacuum pump.
[0006] The beneficial effects of the present scheme are:
[0007] 1, the auxiliary steam unit in the present scheme produces water vapor by auxiliary steam heat exchanger using auxiliary steam as heat source, because steam outlet pipe is communicated with vacuum pump, so auxiliary steam heat exchanger is also in negative pressure state with heat medium water heat exchanger generally, that is, auxiliary steam heat exchanger in the present scheme also produces water vapor by low-temperature flash method, so the pressure of water vapor produced in auxiliary steam heat exchanger and heat medium water heat exchanger is the same, and they can work simultaneously, in actual application, the amount of water vapor produced by auxiliary steam heat exchanger can be adjusted according to the amount of water vapor produced by heat medium water, so that the water vapor produced by auxiliary steam can be used as supplement when the water vapor produced by heat medium water is insufficient, which can fully guarantee the full use of heat medium water energy, and avoid frequent opening and closing of heat medium water unit.
[0008] 2, the auxiliary steam in the present scheme is not directly used to heat the position needing heating in production process, but is used to heat to produce water vapor, and the produced water vapor is used to heat the position needing heating, and in auxiliary steam heat exchanger, even if high-temperature and high-pressure auxiliary steam is directly used, water vapor can also be normally produced, so there is no need to set temperature and pressure reducing device, which effectively reduces the cost of device.
[0009] 3, because the pressure of water vapor produced in auxiliary steam heat exchanger and heat medium water heat exchanger is the same, the water vapor produced in auxiliary steam heat exchanger and heat medium water heat exchanger can be delivered to use position by the same pipeline, the pipeline design is simpler, and the cost is lower.
[0010] Further, auxiliary steam unit and steam outlet pipe are each equipped with at least two, and each auxiliary steam unit is communicated with steam outlet pipe.
[0011] The beneficial effects of the present scheme are: multiple auxiliary steam units work simultaneously, which can produce more water vapor, and when the difference between the water vapor produced by heat medium water and the water vapor needed is large, the water vapor produced by auxiliary steam is enough. And when water vapor is needed in multiple places, multiple auxiliary steam units provide water vapor for multiple places needing water vapor, which facilitates adjusting the amount of water vapor produced by auxiliary steam heat exchanger according to the amount of water vapor needed in each place.
[0012] Further, each steam outlet pipe is communicated with at least two auxiliary steam units.
[0013] The beneficial effect of the present scheme is that when the steam required at a certain place is relatively large or the auxiliary steam heat exchanger communicated with the place fails to generate steam, the present scheme can provide steam for the place through another auxiliary steam unit communicated with the steam outlet pipe, thereby ensuring normal operation of the factory.
[0014] Further, the number of heat medium water units is the same as that of auxiliary steam units, and each steam outlet pipe is communicated with at least one heat medium water unit and at least one auxiliary steam unit.
[0015] The beneficial effect of the present scheme is that when the steam generated by the heat medium water unit is insufficient, the present scheme ensures that each heat medium water unit is provided with at least one auxiliary steam unit to provide steam.
[0016] Further, the steam outlet pipe is communicated with a condenser.
[0017] The beneficial effect of the present scheme is that the low-temperature steam after doing work is condensed into liquid water by the condenser, which is convenient for internal circulation and continuous use.
[0018] Further, the condenser is provided with a condensate water outlet, the condensate water outlet is communicated with a condensate water tank, the condensate water tank is provided with an air outlet, and a vacuum pump is communicated with the air outlet.
[0019] The beneficial effect of the present scheme is that the condensate water tank can collect the condensed water, which is convenient for unified use, and the condensate water tank is located between the vacuum pump and the steam outlet pipe, which can avoid water entering the vacuum pump and causing failure.
[0020] Further, the condensate water tank is provided with a liquid outlet, the auxiliary steam heat exchanger is provided with a clean water inlet communicated with the steam outlet, and the liquid outlet is communicated with the clean water inlet.
[0021] The beneficial effect of the present scheme is that the water collected in the condensate water tank is condensed water obtained by condensing steam, and the water does not contain various ions and other substances that are easy to produce scale, so that the condensed water is re-input into the auxiliary steam heat exchanger to be heated to generate steam, which can avoid scale in the auxiliary steam heat exchanger, so that there is no need to clean the scale, and the use is more convenient.
[0022] Further, a condensate pump is arranged between the liquid outlet and the clean water inlet.
[0023] The beneficial effect of the present scheme is that the condensate pump can provide pressure for inputting the condensed water into the auxiliary steam heat exchanger and the heat medium water heat exchanger.
[0024] Further, the condensate water tank is communicated with a clean water pool.
[0025] The beneficial effect of the scheme is that when the water collected in the condensate tank is excessive, the water can be guided into the clean water pool for storage.
[0026] Further, the heat medium water heat exchanger is provided with a heat medium water outlet, the heat medium water outlet is communicated with a booster pump, and the booster pump is communicated with the original heat medium water system.
[0027] The beneficial effect of the scheme is that the original heat medium water system in the scheme refers to the existing system in the factory for heating the heat medium water, and the booster pump in the scheme can guide the water in the heat medium water heat exchanger into the original heat medium water system in the factory, so that the heat medium water is heated again by the original heat medium water system, thereby realizing the reuse of the heat medium water. BRIEF DESCRIPTION OF DRAWINGS
[0028] Figure 1 It is a system diagram of the auxiliary steam unit in the embodiment of the utility model;
[0029] Figure 2 It is a system diagram of the heat medium water unit in the embodiment of the utility model. DETAILED DESCRIPTION
[0030] The following will be further described in detail through specific embodiments:
[0031] The reference signs in the drawings of the specification include: auxiliary steam heat exchanger 1, communication pipeline 11, steam outlet pipe 21, heater 2, condenser 3, condensate tank 4, vapor-liquid separator 41, vacuum pump 42, condensate pump 5, heat medium water heat exchanger 6, and booster pump 7.
[0032] EMBODIMENT
[0033] The embodiment is basically as shown in Figure 1 and Figure 2 A mixed heat supply device suitable for a low-temperature flash evaporation system, comprising a condensate tank 4, a clean water pool, two heat medium water units, two steam outlet pipes 21, two auxiliary steam units and two condensers 3, the auxiliary steam unit comprises an auxiliary steam heat exchanger 1 and an auxiliary steam inlet pipe, the auxiliary steam heat exchanger 1 adopts an existing heat exchanger, and the structure of the heat exchanger will not be described in the embodiment. The auxiliary steam heat exchanger 1 is provided with a heat source inlet, a liquid water outlet, a steam outlet, a clean water inlet and a clean water outlet, the auxiliary steam inlet pipe is communicated with the heat source inlet, the auxiliary steam is guided into the auxiliary steam heat exchanger 1, the liquid water outlet is communicated with the clean water pool, and the liquid water formed after heat exchange is guided into the clean water pool for storage.
[0034] The steam outlets of the two auxiliary steam heat exchangers 1 are respectively communicated with the two steam outlet pipes 21, and the communication pipeline 11 is arranged between the two steam outlets, the steam outlets of the two auxiliary steam heat exchangers 1 are communicated through the communication pipeline 11, and the valve is arranged on the communication pipeline 11, and each steam outlet pipe can be communicated with the two auxiliary steam heat exchangers 1 through the communication pipeline 11.
[0035] There are two places in this embodiment where water vapor is needed, both of which are the heaters 2, and the two steam outlets 21 are respectively communicated with the two heaters 2. The two heaters 2 are respectively communicated with the two condensers 3, and the condensers 3 in this embodiment also adopt the prior art. The two condensers 3 are respectively provided with condensate water outlets, and the two condensate water outlets are respectively communicated with the condensate water tank 4. The condensate water tank 4 is provided with a gas outlet, and the gas outlet is sequentially communicated with the vapor-liquid separator 41 and the vacuum pump 42. The vacuum pump 42 forms a negative pressure in the condensate water tank 4, the condensers 3 and the steam outlets 21, so that a negative pressure is formed in the auxiliary steam heat exchanger 1, and low-temperature flash evaporation is realized. The condensate water tank 4 is also communicated with the clean water pool, and a valve is arranged between the condensate water tank 4 and the clean water pool. When the valve is opened, the excessive condensate water in the condensate water tank 4 can be collected in the clean water pool.
[0036] The heat medium water unit includes a heat medium water heat exchanger 6. The heat medium water heat exchanger 6 in this embodiment has the same structure as the auxiliary steam heat exchanger 1. The heat medium water heat exchanger 6 is provided with a heat medium water inlet, a heat medium water outlet, a clean water inlet and a steam outlet. The heat medium water inlet is communicated with a heat medium water inlet pipe for introducing heat medium water into the heat medium water heat exchanger 6. The heat medium water outlet is communicated with a booster pump 7 for quickly guiding the heat medium water in the heat medium water heat exchanger 6 to the original heat medium water system for heating again and recycling. The steam outlets of the two heat medium water heat exchangers 6 are respectively communicated with the two steam outlets 21 to provide water vapor for the two heaters 2.
[0037] The condensate water tank 4 is provided with a liquid outlet. The liquid outlet in this embodiment is communicated with the two heat medium water heat exchangers 6 and the two auxiliary heat exchangers, and a condensate pump 5 is arranged between the liquid outlet and each clean water inlet for supplementing the clean water in the heat medium water heat exchanger 6 and the auxiliary heat exchanger after the clean water is heated and evaporated to form water vapor and discharged from the steam outlet 21. Since the supplemented clean water is obtained by condensing water vapor, no scale will be formed in the heat exchanger.
[0038] The specific implementation process is as follows:
[0039] Initially, the water vapor generated by the two heat medium water heat exchangers 6 is used to provide water vapor for the two heaters 2, and the vacuum pump 42 works to make the water vapor generated by the heat medium water heat exchanger 6 enter the two heaters 2 through the two steam outlets 21 respectively. After the water vapor is heated in the heater 2, it is condensed into liquid condensate water, and the residual water vapor enters the condenser 3 to be completely condensed into liquid condensate water, which is collected in the condensate water tank 4.
[0040] When the clean water in the heat medium water heat exchanger 6 is insufficient for heating to form water vapor, the condensate pump 5 is used to introduce the condensate water in the condensate water tank 4 into the heat medium water heat exchanger 6 to supplement the clean water.
[0041] When the water vapor generated by the heat medium water is insufficient, the auxiliary steam is introduced into the auxiliary steam heat exchanger 1, and the auxiliary steam is used as a heat source to form water vapor in the auxiliary steam heat exchanger 1, and the water vapor formed in the two auxiliary steam heat exchangers 1 enters the two heaters 2 through the two steam outlet pipes 21 respectively, and is used simultaneously with the water vapor generated by the heat medium water heat exchanger 6.
[0042] When one of the auxiliary steam heat exchangers 1 fails, the valve on the communication pipeline 11 is opened, and the other auxiliary steam heat exchanger 1 provides water vapor for the heater 2 connected with the failed auxiliary steam heat exchanger 1.
[0043] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical scheme of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like recorded in the specification can be used to explain the content of the claims.
Claims
1. A hybrid heating device adapted to a low-temperature flash system, comprising a heat medium water unit and a steam outlet pipe, the heat medium water unit comprising a heat medium water heat exchanger, a heat medium water inlet pipe being in communication with a liquid inlet end of the heat medium water heat exchanger, characterized in that: The auxiliary steam unit comprises an auxiliary steam heat exchanger and an auxiliary steam inlet pipe, the auxiliary steam heat exchanger is provided with a heat source inlet, and the auxiliary steam inlet pipe is communicated with the heat source inlet; the heat medium water heat exchanger and the auxiliary steam heat exchanger are both provided with steam outlets, the two steam outlets are both communicated with a steam outlet pipe, and the steam outlet pipe is communicated with a vacuum pump.
2. The hybrid heating device adapted for a low temperature flash system of claim 1, wherein: The auxiliary steam unit and the steam outlet pipe are both provided with at least two, and each auxiliary steam unit is communicated with a steam outlet pipe.
3. A hybrid heating device adapted for a low temperature flash system according to claim 2, characterized in that: Each steam outlet pipe is communicated with at least two auxiliary steam units.
4. The hybrid heating system of claim 2, wherein: The number of the heat medium water units is the same as that of the auxiliary steam units, and each steam outlet pipe is communicated with at least one heat medium water unit and at least one auxiliary steam unit.
5. The hybrid heating system of claim 1, wherein: The steam outlet pipe is communicated with a condenser.
6. A hybrid heating device adapted for use with a low temperature flash system according to claim 5, wherein: The condenser is provided with a condensate outlet, the condensate outlet is communicated with a condensate tank, the condensate tank is provided with an air outlet, and the vacuum pump is communicated with the air outlet.
7. A hybrid heating device adapted for a low temperature flash system according to claim 6, characterized in that: The condensate tank is provided with a liquid outlet, the auxiliary steam heat exchanger is provided with a clean water inlet communicated with the steam outlet, and the liquid outlet is communicated with the clean water inlet.
8. The hybrid heating device adapted for a low temperature flash system of claim 6, wherein: A condensate pump is arranged between the liquid outlet and the clean water inlet.
9. A hybrid heating system adapted for use with a low temperature flash system according to any one of claims 6 to 8, wherein: The condensate tank is communicated with a clean water pool.
10. The hybrid heating system of claim 1, wherein: The heat medium water heat exchanger is provided with a heat medium water outlet, the heat medium water outlet is communicated with a booster pump, and the booster pump is communicated with an original heat medium water system.