Waste water heat energy utilization energy-saving device

Abstract

The utility model discloses a waste water heat energy utilization energy-saving device which comprises a storage device and a heat exchange device, the storage device comprises a waste water storage tank and a water suction pump, the inside of the waste water storage tank is used for storing low-temperature waste water, the waste water storage tank is provided with a water inlet, a first water outlet and a second water outlet, the first water outlet is connected with a waste water evaporation feeding groove, and the second water outlet is connected with a waste water evaporation feeding groove. The water pumps are arranged at the first water outlet and the second water outlet; the heat exchange device comprises a steam-water separator, a first heat exchanger and a second heat exchanger, the air inlet end of the first heat exchanger is connected with a hot steam source, the air outlet end of the first heat exchanger is communicated with the steam-water separator, the water inlet end of the first heat exchanger is connected with the second water outlet through the water suction pump, and the water outlet end of the first heat exchanger is connected with the water inlet; the utility model aims to solve the problems that in the prior art, when a wastewater evaporation device evaporates wastewater, due to the fact that the initial temperature of the wastewater is low, more energy is consumed to heat the wastewater, and energy is wasted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of thermal energy utilization technical field, specifically to a kind of wastewater thermal energy utilization energy-saving device. BACKGROUND

[0002] Wastewater evaporation treatment technology has important significance in environmental protection and resource recovery, with the acceleration of industrialization process, wastewater discharge increases significantly, which poses a serious threat to water resources and ecological environment. Wastewater evaporation technology vaporizes water in wastewater by heating, leaving dissolved solids or solutes. Common equipment includes multiple-effect evaporators, heat pump evaporators and evaporation crystallizers. Although this technology requires a lot of heat, modern technology has made many improvements in energy efficiency, such as using waste heat and using heat pump technology to reduce energy demand. With the application of new materials and automation control technology, the performance and processing efficiency of wastewater evaporation equipment are continuously improved, effectively reducing pollutant emissions, achieving efficient use of resources, and making important contributions to environmental protection and sustainable development.

[0003] The utility model patent (hereinafter referred to as "prior art 1") with application number CN201810202714.9 and publication number CN108249499A discloses a method and device for low-temperature evaporation and concentration of high-salinity wastewater using high-temperature industrial wastewater. The method is that high-temperature industrial wastewater enters the evaporator, which is in a vacuum environment. The high-temperature industrial wastewater is vaporized under vacuum to produce low-pressure steam. The low-pressure steam enters the condenser directly or through a booster. In the condenser, the low-pressure steam is mixed with high-salinity wastewater and undergoes mixed heat exchange. The condenser is also in a vacuum environment. The high-temperature high-salinity wastewater is evaporated again, and the water vapor is discharged and condensed into clean water. The high-salinity wastewater with reduced water volume and increased salt content is discharged from the condenser. The device includes an evaporator, a condenser, and a vacuum pump. The evaporator and the condenser are connected to the vacuum pump, and the steam discharge port on the evaporator is connected to the condenser.

[0004] The specification of prior art 1 discloses a method and device for low-temperature evaporation and concentration of high-salinity wastewater using high-temperature industrial wastewater. The waste heat of high-temperature industrial wastewater is used to evaporate and concentrate high-salinity wastewater. However, in actual application, direct evaporation of wastewater will result in energy waste due to the low initial temperature of wastewater. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of wastewater thermal energy utilization energy-saving device, to solve the problem of energy waste caused by the initial temperature of wastewater being low when the wastewater evaporation device in prior art evaporates wastewater, which consumes more energy to heat wastewater.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model provides an energy saving device for wastewater heat energy utilization, it includes: storage device and heat exchange device, storage device includes: wastewater storage tank and water pump, the inside for storing low temperature wastewater of wastewater storage tank, wastewater storage tank has water inlet, first water outlet and second water outlet, first water outlet is connected with wastewater evaporation feed groove, and first water outlet and second water outlet all are provided with the water pump,

[0008] Heat exchange device includes: steam-water separator, first heat exchanger and second heat exchanger, the gas inlet end of first heat exchanger is connected with hot steam source, and the gas outlet end is communicated with steam-water separator, and the water inlet end of first heat exchanger is connected with second water outlet through the water pump, and the water outlet end is connected with the water inlet;

[0009] Wherein, the water inlet end of second heat exchanger connected with electrolytic cooling water source is connected with the water outlet end connected with cold water pool, and the other water inlet end is connected with the other water outlet end.

[0010] Further, the wastewater storage tank has a plurality of, and the plurality of wastewater storage tanks are connected through the connecting pipe, the first water outlet and the water inlet are located on the leftmost wastewater storage tank, and the second water outlet is located on the rightmost wastewater storage tank.

[0011] Further, the first water outlet and the second water outlet are connected with the water pump through a valve respectively.

[0012] Further, the first heat exchanger and the second heat exchanger are both plate heat exchangers.

[0013] Further, the first heat exchanger has two gas inlets, and the two gas inlets are connected with the hot steam source.

[0014] Further, the connecting pipe is a flange structure.

[0015] Further, the wastewater storage tank also has a water inlet pipe, and the water inlet pipe is connected with the low-temperature wastewater source.

[0016] Further, the wastewater storage tank is provided with a heat preservation device outside, and the heat preservation device is used for heat preservation of the wastewater in the wastewater storage tank.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model mainly includes storage device and heat exchange device, in the actual use process, the staff discharges low temperature wastewater to wastewater storage tank, then drives the water pump of second water outlet to start, the water pump respectively draws low temperature wastewater into the water inlet end and water inlet end of first heat exchanger and second heat exchanger, then controls hot steam source to the gas inlet end on first heat exchanger and the hot steam that enters, hot steam and low temperature wastewater carry out heat exchange, after wastewater heating, recycle to wastewater storage tank, at the same time, hot steam is cold and forms warm steam and high temperature cooling water, warm steam is discharged to the steam-water separator in the gas outlet end of first heat exchanger and handles, high temperature cooling water enters second heat exchanger through the other water inlet end of second heat exchanger, high temperature cooling water and low temperature wastewater carry out heat exchange in second heat exchanger, after heat exchange, cooling water is discharged to the cool water pool, after wastewater heating, recycle to wastewater storage tank, keep on circulating the above operation, and then improve the initial temperature of wastewater in wastewater storage tank, like this, when evaporating wastewater, can reduce the time of heating wastewater, utilizes less energy to evaporate and handle wastewater, saves energy. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be to the drawing needed in the embodiment used briefly introduce, it should be understood, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the range, for ordinary skilled person in the art comes, under the premise of not paying creative labor, can also obtain other related drawings according to these drawings.

[0020] Fig. 1 It is the structural schematic diagram of the utility model.

[0021] Fig. 2 It is the connecting relation schematic diagram between the heat preservation device and wastewater storage tank of the utility model.

[0022] In the drawing, 101-wastewater storage tank, 102-water pump, 103-water inlet, 104-first water outlet, 105-second water outlet, 107-steam-water separator, 108-first heat exchanger, 109-second heat exchanger, 110-connecting pipe, 111-water inlet pipe, 112-heat preservation cover, 113-outer coil pipe, 114-heating rod. DETAILED DESCRIPTION

[0023] The utility model will be further described below in conjunction with the embodiment, the described embodiment is only a part of the embodiment of the utility model, is not all the embodiment. Based on the embodiment in the utility model, the ordinary skilled person in the art obtains other used embodiment under the premise of not doing creative labor, all belongs to the protection scope of the utility model.

[0024] Please refer toFigs. 1-2 The utility model discloses a kind of wastewater heat energy utilization energy-saving devices, including: storage device and heat exchange device, storage device includes: wastewater storage tank 101 and water pump 102, wastewater storage tank 101 inside is used to store low-temperature wastewater, wastewater storage tank 101 has water inlet 103, first water outlet 104 and second water outlet 105, first water outlet 104 is connected with wastewater evaporation feed groove, first water outlet 104 and second water outlet 105 are provided with the water pump 102;

[0025] Heat exchange device includes: steam-water separator 107, first heat exchanger 108 and second heat exchanger 109, the air inlet end of first heat exchanger 108 is connected with hot steam source, and the air outlet is communicated with steam-water separator 107, and the water inlet end of first heat exchanger 108 is connected with second water outlet 105 by the water pump 102, and the water outlet end is connected with the water inlet 103;Two water inlets on second heat exchanger 109 are connected with electrolytic cooling water source and second water outlet 105 respectively, and two water outlets are connected with cooling pond and wastewater storage tank 101 respectively;

[0026] Among them, the water inlet end connected with electrolytic cooling water source on second heat exchanger 109 is connected with the water outlet end connected with cooling pond, and the other water inlet end is connected with the other water outlet end;

[0027] The utility model mainly includes storage device and heat exchange device, in actual use process, staff discharges low-temperature wastewater into wastewater storage tank 101, then drives the water pump 102 of second water outlet 105 to start, and the water pump 102 is pumped into the water inlet end and water inlet end of first heat exchanger 108 and second heat exchanger 109 with low-temperature wastewater respectively, then controls hot steam source and passes into hot steam to the air inlet end on first heat exchanger 108, and hot steam and low-temperature wastewater carry out heat exchange, and wastewater is heated and recycled to wastewater storage tank 101, while hot steam is cooled and forms warm steam and high-temperature cooling water, and warm steam is discharged to steam-water separator 107 through the air outlet end of first heat exchanger 108 and is handled, and high-temperature cooling water enters second heat exchanger 109 through the other water inlet end of second heat exchanger 109, and high-temperature cooling water and low-temperature wastewater carry out heat exchange in second heat exchanger 109, and cooling water is discharged to cooling pond after heat exchange, and wastewater is heated and recycled to wastewater storage tank 101, and the above operation is always circulated, and then the initial temperature of wastewater in wastewater storage tank 101 is improved, so when evaporating wastewater, the time of heating wastewater can be reduced, and less energy can be used to evaporate and handle wastewater, and energy is saved.

[0028] In some embodiments, the waste water storage tank 101 has several waste water storage tanks 101 connected by the connecting pipe 110, the first water outlet 104 and the water inlet 103 are located on the leftmost waste water storage tank 101, and the second water outlet 105 is located on the rightmost waste water storage tank 101.

[0029] In actual use, the waste water storage tank 101 is provided with several waste water storage tanks 101 connected with each other, which can increase the capacity of the waste water storage tank 101, so that the initial temperature of more waste water is increased, and the energy consumption is further reduced.

[0030] In some embodiments, the first water outlet 104 and the second water outlet 105 are respectively connected with the water pump 102 through a valve.

[0031] In some embodiments, the first heat exchanger 108 and the second heat exchanger 109 are both plate heat exchangers.

[0032] In actual use, the plate heat exchanger is used because the heat exchange rate of the plate heat exchanger is high, which can further save the energy of waste water evaporation.

[0033] In some embodiments, the first heat exchanger 108 has two gas inlets, and the two gas inlets are connected with a hot steam source.

[0034] In actual use, the two gas inlets are provided to improve the efficiency of the hot steam entering the first heat exchanger 108, and improve the efficiency of waste water heat exchange.

[0035] In some embodiments, the connecting pipe 110 is a flange structure.

[0036] In actual use, the flange structure of the connecting pipe 110 can be easily disassembled and has good sealing performance.

[0037] In some embodiments, the waste water storage tank 101 also has a water inlet pipe 111, which is used to connect with a low temperature waste water source.

[0038] In some embodiments, the inventor finds that in cold weather, the heated waste water in the waste water storage tank 101 will be cooled due to weather factors, which will increase the energy consumption of waste water evaporation; according to this improvement idea, such as Fig. 2As shown, the heat preservation device is arranged outside the wastewater storage tank 101, and is used for heat preservation of the wastewater in the wastewater storage tank 101; the heat preservation device comprises a heat preservation cover 112, an outer coil pipe 113 and a heating rod 114, the heating rod 114 is installed at a center position inside the wastewater storage tank 101, the heat preservation cover 112 is installed on an outer wall of the wastewater storage tank 101, and the outer coil pipe 113 is installed inside the heat preservation cover 112 and fixedly connected with the outer wall of the wastewater storage tank 101; an inlet end of the outer coil pipe 113 is connected with an outlet end of the hot steam source, and an outlet end of the outer coil pipe 113 is connected with the steam-water separator 107.

[0039] In actual use, the hot steam source circulates to pass hot steam into the outer coil pipe 113, so that the wastewater in the wastewater storage tank 101 is fully heat preserved, and the discharged hot steam flows into the steam-water separator 107 for treatment; the advantage of the arrangement is that the temperature of the wastewater in the wastewater storage tank 101 can be ensured in cold weather, so that the subsequent wastewater can reduce energy consumption when evaporated.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] In addition, the terms "first", "second", "third", "fourth" are only for description purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, therefore, the features limited by "first", "second", "third", "fourth" can explicitly or implicitly include at least one of the features.

[0042] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "arrangement", "connection", "fixing", "screw connection" and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited, the specific meaning of the above terms in the present application can be understood according to the specific circumstances by those skilled in the art.

[0043] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater heat energy utilization energy-saving device, characterized by: include: A storage device comprises: a wastewater storage tank (101) and a water pump (102); the wastewater storage tank (101) is used to store low-temperature wastewater; the wastewater storage tank (101) is provided with a water inlet (103), a first water outlet (104) and a second water outlet (105); the first water outlet (104) is connected to a wastewater evaporation feed tank; and the first water outlet (104) and the second water outlet (105) are both provided with the water pump (102); and The heat exchange device comprises: a steam-water separator (107), a first heat exchanger (108) and a second heat exchanger (109); the air inlet of the first heat exchanger (108) is connected to a hot steam source, and the air outlet is in communication with the steam-water separator (107); the water inlet of the first heat exchanger (108) is connected to a second water outlet (105) via the water pump (102), and the water outlet is connected to the water inlet (103); the two water inlet ends of the second heat exchanger (109) are respectively connected to an electrolytic cooling water source and the second water outlet (105); and the two water outlet ends are respectively connected to a cooling water pool and a wastewater storage tank (101); The water inlet end of the second heat exchanger (109) connected to the electrolysis cooling water source is connected to the drainage end connected to the cold water tank, and the other water inlet end is connected to the other drainage end.

2. The wastewater heat energy utilization energy-saving device according to claim 1, characterized in that: There are a plurality of wastewater storage tanks (101), which are connected via a connecting pipe (110). The first water outlet (104) and the water inlet (103) are located on the leftmost wastewater storage tank (101), and the second water outlet (105) is located on the rightmost wastewater storage tank (101).

3. The wastewater heat energy utilization energy-saving device according to claim 1, characterized in that: The first water outlet (104) and the second water outlet (105) are connected to the water pump (102) via a valve respectively.

4. The wastewater heat energy utilization energy-saving device according to claim 1, characterized in that: The first heat exchanger (108) and the second heat exchanger (109) are both plate-type heat exchangers.

5. The wastewater heat energy utilization energy-saving device according to claim 1, characterized in that: The first heat exchanger (108) is provided with two air inlets, both of which are connected to a hot steam source.

6. The wastewater heat energy utilization energy-saving device according to claim 2, characterized in that: The connecting pipe (110) is a flange structure.

7. The wastewater heat energy utilization energy-saving device according to claim 1, characterized in that: The wastewater storage tank (101) is also provided with a water inlet pipe (111), and the water inlet pipe (111) is used to be connected to a low-temperature wastewater source.

8. The wastewater heat energy utilization energy-saving device according to claim 1, characterized in that: A heat preservation device is provided outside the wastewater storage tank (101), and the heat preservation device is used to keep the wastewater inside the wastewater storage tank (101) warm.

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