CN113716642B - Device for concentrating desulfurization wastewater by utilizing waste heat and low-temperature flue gas concentrating device - Google Patents
Device for concentrating desulfurization wastewater by utilizing waste heat and low-temperature flue gas concentrating device Download PDFInfo
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- CN113716642B CN113716642B CN202111048820.4A CN202111048820A CN113716642B CN 113716642 B CN113716642 B CN 113716642B CN 202111048820 A CN202111048820 A CN 202111048820A CN 113716642 B CN113716642 B CN 113716642B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
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Abstract
The invention relates to a device for concentrating desulfurization wastewater by waste heat and a low-temperature flue gas concentration device, wherein the device for concentrating desulfurization wastewater by waste heat comprises an evaporation structure, a water storage tank, a circulating pump, a water supplementing pipe and a water collecting pipe; the evaporation structures are layered along the vertical direction; each layer of evaporation structure is fixed at the smoke inlet of the desulfurization absorption tower; the top of the water storage tank is provided with an input port, and the lower part of one side is provided with an output port; the input end of the circulating pump is communicated with the output port of the water storage tank, and the output end of the circulating pump is communicated with the water supplementing pipe; the water supplementing pipe is vertically arranged and communicated with at least one layer of evaporation structure; the water collecting pipe is vertically arranged and is respectively communicated with at least one layer of evaporation structure and the input port of the water storage tank. The flue gas in the flue gas inlet of the desulfurization absorption tower is provided with heat, and the flue gas can flow through the top side and the bottom side of each layer of evaporation structure and conduct and convect heat exchange with desulfurization wastewater on the evaporation structure, so that the heat of the low-temperature flue gas is reasonably utilized, and the heat utilization rate of the low-temperature flue gas is improved.
Description
Technical Field
The invention relates to the technical field of desulfurization wastewater treatment, in particular to a device for concentrating desulfurization wastewater by utilizing waste heat and a low-temperature flue gas concentrating device.
Background
The desulfurization absorption tower mainly has the function of circularly spraying slurry mixed with limestone and gypsum to absorb sulfur dioxide in flue gas entering the absorption tower. In order to balance chloride ions in the absorption tower in the reaction process of the desulfurization absorption tower, a certain amount of desulfurization wastewater is discharged periodically, the wastewater has complex components and high salt content, cannot be recycled and can only be discharged in a zero way.
Therefore, how to reasonably combine the heat energy of the low-temperature flue gas flowing through the flue gas inlet of the desulfurization absorption tower with zero emission of desulfurization wastewater, and the realization of low-cost concentration by utilizing the heat energy concentration reduction desulfurization wastewater of the low-temperature flue gas is a technical problem to be solved in the field.
Disclosure of Invention
The invention provides a device for concentrating desulfurization wastewater by utilizing waste heat and a low-temperature flue gas concentrating device, which are used for solving the problem that heat of low-temperature flue gas flowing through a flue gas inlet of a desulfurization absorption tower cannot be effectively utilized.
The invention provides a device for concentrating desulfurization wastewater by utilizing waste heat, which aims at realizing the purpose, and comprises an evaporation structure, a water storage tank, a circulating pump, a water supplementing pipe and a water collecting pipe;
the evaporation structures are multiple and are layered along the vertical direction; each layer of evaporation structure is fixed at the smoke inlet of the desulfurization absorption tower;
the top of the water storage tank is provided with an input port, and the lower part of one side is provided with an output port;
the input end of the circulating pump is communicated with the output port of the water storage tank, and the output end of the circulating pump is communicated with the water supplementing pipe;
the water supplementing pipe is vertically arranged and communicated with at least one layer of evaporation structure;
the water collecting pipe is vertically arranged and is respectively communicated with at least one layer of evaporation structure and an input port of the water storage tank;
the evaporation plate of the at least one layer of evaporation structure comprises a first drainage section; the first drainage section is obliquely arranged, the section is of a linear structure, a water distributor of an evaporation structure is arranged above the higher end of the first drainage section, and a recovery tank of the evaporation structure is arranged at the lower end of the first drainage section; the evaporation plate of the at least one layer of evaporation structure further comprises a second drainage section; the second drainage section is integrally arranged below the first drainage section and is also obliquely arranged, the section of the second drainage section is of an arc-shaped structure, the higher end of the second drainage section is fixedly connected with the lower end of the first drainage section, and a recovery groove is arranged below the lower end of the second drainage section; the evaporation plate of the at least one layer of evaporation structure further comprises a third drainage section; the third drainage section is integrally arranged below the second drainage section and is also obliquely arranged, the section of the third drainage section is of a linear structure, the higher end of the third drainage section is fixedly connected with the lower end of the second drainage section, and the lower end of the third drainage section is provided with a recovery groove;
the number of the evaporation structures 100 is 12; the evaporation plate of the 1 st to 8 th layer evaporation structure 100 comprises a first drainage section, a second drainage section and a third drainage section; the drainage sections of the 9 th layer to the 12 th layer evaporation structures at least comprise a first drainage section.
In one embodiment, each layer of evaporation structure comprises an evaporation plate, a water distributor and a recovery tank;
the evaporating plate is obliquely arranged;
the water distributor is arranged above the higher end of the evaporating plate and can distribute water to the plate surface of the evaporating plate; the water distributor of at least one layer of evaporation structure is communicated with the water supplementing pipe;
the recovery tank is arranged at the lower end of the evaporation plate; the recovery groove of at least one layer of evaporation structure is communicated with the water collecting pipe.
In one embodiment, the top side of the evaporating plate is a concave surface and the bottom side is a convex surface.
In one embodiment, the water distributor is of a strip hollow structure, the axial direction of the water distributor is the same as the body width direction of the evaporation plate, the bottom end of the water distributor is fixedly connected with the higher end of the evaporation plate, and the lower part of the water distributor is provided with a water distribution hole facing the top surface of the evaporation plate.
In one embodiment, each layer of evaporation structure further comprises a smoke barrier strip;
one side of the smoke baffle strip is fixedly connected with the upper part of one side of the water distributor, which is provided with the water distribution holes, and the opposite side is a free side and extends towards the top surface of the evaporation plate so as to shield the water distribution holes.
In one embodiment, the recovery tank is a strip hollow structure with an open top, the axial direction is the same as the body width direction of the evaporation plate, and the top end of one side wall is fixedly connected with the lower end of the evaporation plate.
In one embodiment, the evaporation plate of at least one layer of the evaporation structure comprises a first drainage section;
the first drainage section is obliquely arranged, the section is of a linear structure, a water distributor of an evaporation structure is arranged above the higher end of the first drainage section, and a recovery tank of the evaporation structure is arranged at the lower end of the first drainage section.
In one embodiment, the evaporation plate of at least one layer of the evaporation structure further comprises a second drainage section;
the second drainage section is wholly located the below of first drainage section, also inclines to set up, and the cross-section is arc structure, and higher end and the lower end fixed connection of first drainage section, the below of lower end are equipped with the recovery tank.
In one embodiment, the evaporation plate of at least one layer of the evaporation structure further comprises a third drainage section;
the third drainage section is wholly arranged below the second drainage section, is obliquely arranged, is of a straight line structure in section, is fixedly connected with the lower end of the second drainage section, and is provided with a recovery groove.
A low-temperature flue gas concentration device based on the same concept comprises a flue gas inlet and the device for concentrating desulfurization wastewater by utilizing waste heat, wherein the device is provided by any one of the specific embodiments;
the smoke inlet is of a trapezoid hollow structure, two opposite sides are provided with side plates, and the middle part is provided with a baffle plate;
the plane of the evaporating plate of each layer of evaporating structure is parallel to the axial direction of the smoke inlet; the lower end of the evaporation plate of at least one layer of evaporation structure is fixedly connected with the side plate on one side of the evaporation plate, and the higher end of the evaporation plate of at least one layer of evaporation structure is fixedly connected with the side plate on the other side of the evaporation plate.
The invention has the beneficial effects that: the device for concentrating the desulfurization wastewater by utilizing the waste heat is provided with the water storage tank, and the desulfurization wastewater in the water storage tank flows into the water supplementing pipe under the drive of the circulating pump and is distributed to at least one layer of evaporation structure. At least one layer of desulphurized waste water concentrated on the evaporation structure can flow back into the water storage tank through the water collecting pipe. The flue gas in the flue gas inlet of the desulfurization absorption tower has certain heat, and can flow through the top side and the bottom side of each layer of evaporation structure to exchange heat with the desulfurization wastewater on the evaporation structure, so that partial water in the desulfurization wastewater on the evaporation structure is evaporated, and the unvaporized desulfurization wastewater flows into the water storage tank to be recovered. On the whole, the heat energy of the low-temperature flue gas which is about to flow into the flue gas inlet of the desulfurization absorption tower is reasonably utilized, the heat utilization rate of the low-temperature flue gas is improved, the energy is saved, the environment is protected, and the environment is protected.
Drawings
FIG. 1 is a schematic view showing the construction of an embodiment of an apparatus for concentrating desulfurization waste water using waste heat according to the present invention;
FIG. 2 is a schematic view showing the construction of another embodiment of an apparatus for concentrating desulfurization waste water using waste heat according to the present invention;
FIG. 3 is a schematic view showing the structure of an embodiment of the layer 1 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 4 is an enlarged partial view of area A of FIG. 3;
FIG. 5 is an enlarged partial view of region B of FIG. 3;
FIG. 6 is a schematic view showing the structure of an embodiment of the layer 2 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 7 is a schematic view showing the structure of an embodiment of the layer 3 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 8 is a schematic view showing the structure of an embodiment of the layer 4 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 9 is a schematic view showing the structure of an embodiment of the layer 5 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 10 is a schematic view showing the structure of an embodiment of the layer 6 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 11 is a schematic view showing the structure of an embodiment of the layer 7 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 12 is a schematic view showing the structure of an embodiment of the layer 8 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 13 is a schematic view showing the structure of an embodiment of the layer 9 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 14 is a schematic view showing the structure of an embodiment of the layer 10 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 15 is a schematic view showing the structure of an embodiment of the 11 th layer evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2;
FIG. 16 is a schematic view showing the structure of an embodiment of the layer 12 evaporation structure in the apparatus for concentrating desulfurization wastewater using waste heat shown in FIG. 2.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar symbols indicate like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "top," "bottom," "inner," "outer," "axis," "circumferential," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present invention or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 and 16, the present invention further provides an apparatus for concentrating desulfurization waste water using waste heat, comprising an evaporation structure 100, a square-structured water storage tank 300, a circulation pump 400, a water replenishment pipe 500 and a water collection pipe 600. The evaporation structure 100 is plural and layered in the vertical direction. Each layer of evaporation structure 100 is fixed at the smoke inlet 200 of the desulfurization absorption tower. The water tank 300 is capable of storing desulfurization wastewater. An input port is provided at the top of the water tank 300, and an output port is provided at the lower part of one side. The input port is arranged at the top of the water storage tank 300, so that the energy consumption required for filling the water storage tank 300 is reduced. The output port is arranged at the lower part of one side of the water storage tank 300, so that the energy consumption required by the output of the desulfurization wastewater in the water storage tank 300 is reduced. The input end of the circulating pump 400 is communicated with the output port of the water storage tank 300, and the output end is communicated with the water replenishing pipe 500, so that the desulfurization wastewater in the water storage tank 300 can be input into the water replenishing pipe 500. The water replenishing pipe 500 is vertically arranged and communicated with the at least one layer of evaporation structure 100, and can convey desulfurization wastewater to the at least one layer of evaporation structure 100, wherein the diameter of the section of the water replenishing pipe is 100mm. The water collecting pipe 600 is vertically arranged and respectively communicated with at least one layer of evaporation structure 100 and the input port of the water storage tank 300, and the diameter of the section of the water collecting pipe is 150mm. The desulfurization waste water on at least one layer of the evaporation structure 100 can be collected in the water collecting pipe 600 and transferred into the water storage tank 300.
In this embodiment, the desulfurization waste water in the water storage tank 300 flows into the water replenishing pipe 500 by the driving of the circulation pump 400, and is then distributed to at least one layer of the evaporation structure 100. The desulfurization waste water concentrated on the at least one layer of evaporation structure 100 can flow back into the water storage tank 300 through the water collecting pipe 600. The flue gas entering the flue gas inlet 200 of the desulfurization absorption tower has a certain amount of heat, and flows through the top side and the bottom side of each layer of the evaporation structure 100 to exchange heat with the desulfurization wastewater on the evaporation structure 100, so that part of moisture in the desulfurization wastewater on the evaporation structure 100 is evaporated, and the unvaporized desulfurization wastewater flows into the water storage tank 300 to be recovered. On the whole, the heat energy of the low-temperature flue gas which is about to flow into the flue gas inlet 200 of the desulfurization absorption tower is reasonably utilized, the heat utilization rate of the low-temperature flue gas is improved, the energy is saved, the environment is protected, and the environmental protection is improved.
In an embodiment of the present invention, each layer of evaporation structure 100 includes an evaporation plate 110, a water distributor 120, and a recovery tank 130. Wherein the evaporation plate 110 is disposed obliquely. The water distributor 120 is disposed above the upper end of the evaporation plate 110, and distributes water to the plate surface (top surface) of the evaporation plate 110. The recovery tank 130 is provided at a lower end of the evaporation plate 110. The water distributor 120 of at least one layer of the evaporation structure 100 is communicated with the water supplementing pipe 500, and the recovery tank 130 of at least one layer of the evaporation structure 100 is communicated with the water collecting pipe 600.
In this embodiment, the evaporation plates 110 of each layer of the evaporation structure 100 are all inclined rightward, and have an included angle of 72 ° with respect to the vertical, the right end being the higher end, and the left end being the lower end. In this way, the desulfurization waste water can be retained on the top side surface of the evaporation plate 110 for a long time so that the desulfurization waste water is evaporated and concentrated. The water distributor 120 of each layer of the evaporation structure 100 is communicated with the water supplementing pipe 500, and the desulfurization waste water in the water supplementing pipe 500 can be distributed into the water distributor 120 of each layer of the evaporation structure 100. After that, the desulfurization waste water flows through the top side of the evaporation plate 110 and then flows into the recovery tank 130. The water collecting pipe 600 is respectively communicated with the recovery grooves 130 of the 1 st, 2 nd, 3 rd, 4 th, 5 th and 6 th evaporation structures 100, and the recovery grooves 130 of the 7 th to 12 th evaporation structures 100 are not communicated with the water collecting pipe 600. The desulfurization waste water in the recovery tank 130 of the evaporation structure 100 of the 1 st to 6 th layers can be collected in the water collecting pipe 600 and flowed into the water storage tank 300 to be recovered. A water distributor 120 is disposed above the upper end of the evaporation plate 110, and the water distributor 120 can distribute water to the top side surface of the evaporation plate 110, where the water distribution refers to uniformly distributing desulfurization wastewater on the top side surface of the evaporation plate 110. The recovery tank 130 is disposed at a lower end of the evaporation plate 110. The desulfurization wastewater flowing out of the water distributor 120 flows through the top side surface of the evaporation plate 110 and is collected in the recovery tank 130. The low temperature flue gas flowing through the top and bottom sides of the evaporation plate 110 of each layer of the evaporation structure 100 is in direct contact with the desulfurization waste water on the top surface of the evaporation plate 110 of the evaporation structure 100 to transfer heat, and can indirectly transfer heat through the evaporation plate 110, so that part of the moisture in the desulfurization waste water on the top side of the evaporation plate 110 is evaporated by utilizing the heat conduction and convection heat exchange principles, and the non-evaporated desulfurization waste water flows into the recovery tank 130 to be recovered. Therefore, the purpose of reasonably utilizing the heat energy of the low-temperature flue gas flowing through the flue gas inlet 200 of the desulfurization absorption tower is achieved, the heat utilization rate of the low-temperature flue gas flowing through the flue gas inlet 200 of the desulfurization absorption tower is improved, independent heating and concentrating treatment operation on desulfurization wastewater is not needed, and the desulfurization waste water desulfurization device is energy-saving and environment-friendly and improves the protection on the environment. And the desulfurization waste water in the water storage tank 300 may flow through the top side of the evaporation plate 110 a plurality of times, completing a plurality of concentration processes on the top side of the evaporation plate 110.
In one embodiment of the present invention, the top side of the evaporating plate 110 is a concave surface and the bottom side is a convex surface. The desulfurization waste water flows through the top side of the evaporation plate 110. Because the top side of the evaporating plate 110 is a concave surface, the effective contact area of the desulfurization waste water and the low-temperature flue gas is increased, and the heat utilization rate of the low-temperature flue gas is improved.
In an embodiment of the present invention, the water distributor 120 is a strip hollow structure, the axial direction of the water distributor is the same as the body width direction of the evaporation plate 110, the bottom end of the water distributor is fixedly connected with the higher end of the evaporation plate 110, and the lower part of the water distributor is provided with a water distribution hole 121 facing the top surface of the evaporation plate 110. Here, the water distributor 120 and the recovery tank 130 are located at both ends of the evaporation plate 110 in the body length direction. The axial direction of the water distributor 120 is the same as the body width direction of the evaporating plate 110, which means that the axial direction of the water distributor 120 is perpendicular to the body length direction of the evaporating plate 110. Both ends of the water distributor 120 are flush with both sides of the evaporation plate 110 in the body width direction. The desulfurization waste water is temporarily stored in the water distributor 120. The water distribution holes 121 formed in the lower portion of the water distributor 120 have a fine strip structure, and both ends thereof extend along the axial direction of the water distributor 120 and face the top surface of the evaporation plate 110. In this way, the desulfurization waste water flowing out from the water distributor 120 can exist in the form of a thin film on the top side of the evaporation plate 110. Therefore, the effective contact area of the desulfurization wastewater and the low-temperature flue gas is further increased, and the heat utilization rate of the low-temperature flue gas is improved. Moreover, as the top side surface of the evaporating plate 110 is a concave surface, the desulfurization waste water in the form of a film is less influenced by the dynamic force of flowing flue gas and is not easy to be carried away by the flue gas, the adsorption force to the evaporating plate 110 is larger, and the desulfurization waste water is prevented from flowing into the desulfurization absorption tower. In addition, the evaporating plate 110 may be made of a material with corrosion resistance, high thermal conductivity and high hydrophilicity. So for evaporating plate 110's life is longer, and the thermal conductivity is better, improves the conduction efficiency to the heat energy of low temperature flue gas, simultaneously, has increased evaporating plate 110's hydrophilicity for desulfurization waste water can be better attached to evaporating plate 110's top side, is difficult for being taken away by the flue gas. The water distributor 120 can be a water pipe with the section diameter of 110-120mm, the water distribution holes 121 are formed in the water pipe, the size of the water distribution holes 121 is designed according to the water yield, the structure is simple, and the water distribution effect is good. In addition, the water distributor 120 is made of corrosion-resistant materials, and has long service life.
In an embodiment of the present invention, each layer of evaporation structure 100 further includes a smoke barrier 140, where one side of the smoke barrier 140 is fixedly connected to an upper portion of a side of the water distributor 120 provided with the water distribution holes 121, and the opposite side is a free side, and extends toward the top surface of the evaporation plate 110 to cover the water distribution holes 121. The free side of the smoke barrier rib 140 is higher than the top surface of the evaporation plate 110 at the corresponding position by a predetermined height. Specifically, the preset height is 5-10mm. The body width of the smoke barrier rib 140 is 300-400mm. Therefore, the water distribution holes 121 are positioned in a relatively closed space surrounded by the smoke baffle 140 and the evaporating plate 110. The smoke baffle 140 can effectively prevent the smoke flowing through the top side surface of the evaporating plate 110 from rushing to the water distribution holes 121, so that the water outlet effect of the water distribution holes 121 is improved, and the water distribution effect of the water distributor 120 is further improved. At the same time, the desulfurization waste water flowing out of the water distribution holes 121 is not influenced to flow to the whole top side surface of the evaporation plate 110.
In an embodiment of the present invention, the recovery tank 130 is a strip hollow structure with an open top, and has the same axial direction as the body width direction of the evaporation plate 110, and two ends respectively flush with two sides of the evaporation plate 110 in the body width direction, and the top of one side wall is fixedly connected with the lower end of the evaporation plate 110. The recovery tank 130 has a simple structure, and can well collect the concentrated desulfurization waste water flowing down from the top side of the evaporation plate 110, thereby being beneficial to recovering and further concentrating the concentrated desulfurization waste water. Further, the recovery tank 130 is fixed to one side wall and the opposite side wall of the evaporation plate 110, and is smoothly connected to the bottom, respectively. Specifically, the depth of the recovery tank 130 is 165-170mm, the distance between the top ends of the two side walls is 340-350mm, and a large opening is provided. Thus, the concentrated desulfurization waste water can flow into the recovery tank 130 more smoothly, and the desulfurization waste water is prevented from splashing. Moreover, the desulfurization waste water is not easy to stay in the recovery tank 130, which is beneficial to the clean removal of the desulfurization waste water in the recovery tank 130. In addition, the material of the recovery tank 130 is a corrosion-resistant metal material, such as a titanium plate, a 1.4529 alloy, a 2205 alloy, and the like, so that the service life of the recovery tank 130 is long.
In one embodiment of the present invention, the number of evaporation structures 100 is 12, and the evaporation structures 100 are layered in the vertical direction, and are respectively a 1 st layer evaporation structure 100, a 2 nd layer evaporation structure 100, a 3 rd layer evaporation structure 100, a 4 th layer evaporation structure 100, a 5 th layer evaporation structure 100, a 6 th layer evaporation structure 100, a 7 th layer evaporation structure 100, an 8 th layer evaporation structure 100, a 9 th layer evaporation structure 100, a 10 th layer evaporation structure 100, an 11 th layer evaporation structure 100, and a 12 th layer evaporation structure 100. The evaporation plate 110 of the at least one layer of evaporation structure 100 comprises a first drainage section 111, and the first drainage section 111 is obliquely arranged. A water distributor is arranged above the higher end of the first drainage section 111, and a recovery tank 130 is arranged at the lower end. In some of these embodiments, the evaporator plate 110 of the 11 th and 12 th layer evaporator structures 100 includes a first drainage section 111. The first drainage section 111 has a good drainage effect so that desulfurization waste water can smoothly, stably and efficiently flow downward. In addition, the length of the first drainage section 111 of the evaporation plate 110 of the 12 th layer evaporation structure 100 is smaller than the length of the second drainage section 112 of the evaporation plate 110 of the 11 th layer evaporation structure 100. Here, the body length direction of the first drainage section 111 is the same as the body length direction of the entire evaporation plate 110. The mode that the evaporation plate 110 of 11 th layer and 12 th layer evaporation structure 100 set up is the adaptation with the flue gas of desulfurization absorption tower's inlet 200 department in the distribution condition in space, has both carried out reasonable utilization to the heat energy of low temperature flue gas, has saved the material again, has reduced manufacturing cost, can also carry out structural dodging to other parts. The drainage segments of the layer 1 to layer 10 evaporation structure 100 comprise at least a first drainage segment 111, and may not comprise a second drainage segment 112 and a third drainage segment 113.
In another embodiment of the present invention, the number of evaporation structures 100 is 12, and the evaporation structures 100 are layered in the vertical direction, and are respectively a 1 st layer evaporation structure 100, a 2 nd layer evaporation structure 100, a 3 rd layer evaporation structure 100, a 4 th layer evaporation structure 100, a 5 th layer evaporation structure 100, a 6 th layer evaporation structure 100, a 7 th layer evaporation structure 100, an 8 th layer evaporation structure 100, a 9 th layer evaporation structure 100, a 10 th layer evaporation structure 100, an 11 th layer evaporation structure 100, and a 12 th layer evaporation structure 100. Wherein the evaporation plate 110 of the at least one layer of evaporation structure 100 comprises a first drainage section 111 and a second drainage section 112. The first drainage section 111 and the second drainage section 112 are both obliquely arranged, the first drainage section 111 is integrally arranged above the second drainage section 112, the cross section is of a linear structure, and a water distributor is arranged above the higher end. The section of the second drainage section 112 is of an arc-shaped structure, the higher end of the second drainage section is fixedly connected with the lower end of the first drainage section 111, and the lower end of the second drainage section is provided with a recovery groove 130. In some embodiments, the evaporation plates 110 of the 9 th and 10 th layer evaporation structures 100 include a first drainage section 111 and a second drainage section 112, and the second drainage sections 112 of the evaporation plates 110 of the 9 th and 10 th layer evaporation structures 100 are located at the middle of the smoke inlet 200 of the desulfurization absorbing tower. The top side of the second drainage section 112 is a concave surface, and the bottom side is a convex surface, so that the effective contact area of desulfurization waste water and flue gas can be increased, and the heat utilization rate of low-temperature flue gas is improved. The first drainage section 111 has a good drainage effect so that desulfurization waste water can smoothly, stably and efficiently flow downward. In addition, the length of the second drainage section 112 of the evaporation plate 110 of the 10 th layer evaporation structure 100 is smaller than the length of the second drainage section 112 of the evaporation plate 110 of the 9 th layer evaporation structure 100, and the length of the first drainage section 111 of the evaporation plate 110 of the 10 th layer evaporation structure 100 is also smaller than the length of the first drainage section 111 of the evaporation plate 110 of the 9 th layer evaporation structure 100. Here, the body length direction of the first drainage section 111 is the same as the body length direction of the entire evaporation plate 110, and the body length direction of the second drainage section 112 is also the same as the body length direction of the entire evaporation plate 110. The mode that the evaporating plate 110 of the 9 th layer and 10 th layer evaporating structure 100 is arranged is matched with the distribution condition of the flue gas at the flue gas inlet 200 of the desulfurization absorption tower in space, so that the heat energy of low-temperature flue gas is reasonably utilized, materials are saved, the manufacturing cost is reduced, and other components can be avoided structurally. The drainage segments of the 1 st to 8 th layer evaporation structures 100, 11 th layer evaporation structure 100, and 12 th layer evaporation structure 100 include at least the first drainage segment 111, and may not include the second drainage segment 112 and the third drainage segment 113.
In one embodiment of the present invention, the number of evaporation structures 100 is 12, and the evaporation structures 100 are layered in the vertical direction, and are respectively a 1 st layer evaporation structure 100, a 2 nd layer evaporation structure 100, a 3 rd layer evaporation structure 100, a 4 th layer evaporation structure 100, a 5 th layer evaporation structure 100, a 6 th layer evaporation structure 100, a 7 th layer evaporation structure 100, an 8 th layer evaporation structure 100, a 9 th layer evaporation structure 100, a 10 th layer evaporation structure 100, an 11 th layer evaporation structure 100, and a 12 th layer evaporation structure 100. The evaporation plate 110 of the at least one evaporation structure 100 comprises a first drainage section 111, a second drainage section 112 and a third drainage section 113, wherein the first drainage section 111, the second drainage section 112 and the third drainage section 113 are all obliquely arranged. The first drainage section 111 is integrally arranged above the second drainage section 112 and the third drainage section 113, the cross section is of a linear structure, and a water distributor is arranged above the higher end. The second drainage section 112 is integrally arranged above the third drainage section 113, the cross section of the second drainage section is of an arc-shaped structure, and the higher end of the second drainage section is fixedly connected with the lower end of the first drainage section 111. The section of the third drainage segment 113 is in a linear structure, the higher end of the third drainage segment is fixedly connected with the lower end of the second drainage segment 112, and the lower end of the third drainage segment is provided with a recovery groove 130. In some embodiments, the evaporation plate 110 of the 1 st to 8 th layer evaporation structures 100 includes a first drainage section 111, a second drainage section 112, and a third drainage section 113, and the second drainage sections 112 of the evaporation plate 110 of the 1 st to 8 th layer evaporation structures 100 are all located in the middle of the smoke inlet 200 of the desulfurization absorbing tower. The top side of the second drainage section 112 is a concave surface, and the bottom side is a convex surface, so that the effective contact area of desulfurization waste water and flue gas can be increased, and the heat utilization rate of low-temperature flue gas is improved. The first drainage section 111 and the third drainage section 113 have a good drainage effect, so that desulfurization waste water can smoothly, stably and efficiently flow downwards. In addition, the third drainage segments 113 of the evaporation plates 110 of the 1 st to 6 th layer evaporation structures 100 have the same length. Here, the body length direction of the third drainage section 113 is the same as the body length direction of the entire evaporation plate 110. The length of the third drainage section 113 of the evaporation plate 110 of the 7 th layer evaporation structure 100 is smaller than the length of the third drainage section 113 of the evaporation plate 110 of the 6 th layer evaporation structure 100, and the length of the third drainage section 113 of the evaporation plate 110 of the 8 th layer evaporation structure 100 is smaller than the length of the third drainage section 113 of the evaporation plate 110 of the 7 th layer evaporation structure 100. The mode that the evaporating plate 110 of the 1 st layer to 8 th layer evaporating structure 100 is arranged is matched with the distribution condition of the flue gas at the flue gas inlet 200 of the desulfurization absorption tower in space, so that the heat energy of low-temperature flue gas is reasonably utilized, materials are saved, the manufacturing cost is reduced, and other components can be structurally avoided. The drainage segments of the 9 th to 12 th layer evaporation structure 100 include at least the first drainage segment 111, and may not include the second drainage segment 112 and the third drainage segment 113.
In one embodiment of the present invention, the number of evaporation structures 100 is 12, and the evaporation structures 100 are layered in the vertical direction, and are respectively a 1 st layer evaporation structure 100, a 2 nd layer evaporation structure 100, a 3 rd layer evaporation structure 100, a 4 th layer evaporation structure 100, a 5 th layer evaporation structure 100, a 6 th layer evaporation structure 100, a 7 th layer evaporation structure 100, an 8 th layer evaporation structure 100, a 9 th layer evaporation structure 100, a 10 th layer evaporation structure 100, an 11 th layer evaporation structure 100, and a 12 th layer evaporation structure 100. The evaporation plate 110 of the evaporation structure 100 from layer 1 to layer 8 comprises a first drainage section 111, a second drainage section 112 and a third drainage section 113, and the second drainage sections 112 of the evaporation plate 110 of the evaporation structure 100 from layer 1 to layer 10 are all positioned in the middle of the smoke inlet 200 of the desulfurization absorption tower. The evaporation plate 110 of the 9 th and 10 th evaporation structures 100 includes a first drainage section 111 and a second drainage section 112, and the second drainage sections 112 of the evaporation plates 110 of the 9 th and 10 th evaporation structures 100 are all located in the middle of the smoke inlet 200 of the desulfurization absorption tower. The evaporation plate 110 of the 11 th and 12 th layer evaporation structure 100 comprises a first drainage section 111. In addition, the lengths of the third drainage segments 113, the lengths of the second drainage segments 112, and the lengths of the first drainage segments 111 of the evaporation plates 110 of the 1 st to 4 th layer evaporation structures 100 are the same. The third drainage section 113 of the evaporation plate 110 of the 5 th layer evaporation structure 100 is the same as the third drainage section 113 of the evaporation plate 110 of the 4 th layer evaporation structure 100 in length, the second drainage section 112 is smaller in length than the second drainage section 112 of the evaporation plate 110 of the 4 th layer evaporation structure 100, and the first drainage section 111 is smaller in length than the first drainage section 111 of the evaporation plate 110 of the 4 th layer evaporation structure 100. Moreover, a preset distance is reserved between one end of the second drainage section 112 of the evaporation plate 110 of the 5 th layer evaporation structure 100, which is far away from the third drainage section 113, and one end of the first drainage section 111, which is far away from the water distributor 120, and the inclination angle of the second drainage section 112 of the 5 th layer evaporation structure 100 is the same as that of the first drainage section 111. The preset distance enables the 5 th layer evaporation structure 100 to avoid other structures of the smoke inlet 200 of the desulfurization absorption tower. The third drainage segment 113 of the evaporation plate 110 of the 6 th layer evaporation structure 100 is the same as the third drainage segment 113 of the evaporation plate 110 of the 5 th layer evaporation structure 100 in length, the second drainage segment 112 is the same as the second drainage segment 112 of the evaporation plate 110 of the 5 th layer evaporation structure 100 in length, the first drainage segment 111 is the same as the first drainage segment 111 of the evaporation plate 110 of the 5 th layer evaporation structure 100 in length, and one end, far away from the third drainage segment 113, of the second drainage segment 112 of the evaporation plate 110 of the 6 th layer evaporation structure 100 is fixedly connected with one end, far away from the water distributor 120, of the first drainage segment 111. The length of the third drainage segment 113 of the evaporation plate 110 of the 7 th layer evaporation structure 100 is smaller than the length of the third drainage segment 113 of the evaporation plate 110 of the 6 th layer evaporation structure 100, the second drainage segment 112 is the same as the length of the second drainage segment 112 of the evaporation plate 110 of the 6 th layer evaporation structure 100, and the first drainage segment 111 is the same as the length of the first drainage segment 111 of the evaporation plate 110 of the 6 th layer evaporation structure 100. The length of the third drainage segment 113 of the evaporation plate 110 of the 8 th layer evaporation structure 100 is smaller than the length of the third drainage segment 113 of the evaporation plate 110 of the 7 th layer evaporation structure 100, the second drainage segment 112 is the same as the length of the second drainage segment 112 of the evaporation plate 110 of the 7 th layer evaporation structure 100, and the first drainage segment 111 is the same as the length of the first drainage segment 111 of the evaporation plate 110 of the 7 th layer evaporation structure 100. The length of the second drainage section 112 of the evaporation plate 110 of the 9 th layer evaporation structure 100 is smaller than the length of the second drainage section 112 of the evaporation plate 110 of the 8 th layer evaporation structure 100, and the length of the first drainage section 111 is smaller than the length of the first drainage section 111 of the evaporation plate 110 of the 8 th layer evaporation structure 100. The length of the second drainage section 112 of the evaporation plate 110 of the 10 th layer evaporation structure 100 is smaller than the length of the second drainage section 112 of the evaporation plate 110 of the 9 th layer evaporation structure 100, and the length of the first drainage section 111 is also smaller than the length of the first drainage section 111 of the evaporation plate 110 of the 9 th layer evaporation structure 100. The length of the first drainage section 111 of the evaporation plate 110 of the 11 th layer evaporation structure 100 is smaller than the length of the second drainage section 112 of the evaporation plate 110 of the 10 th layer evaporation structure 100. The length of the first drainage section 111 of the evaporation plate 110 of the layer 12 evaporation structure 100 is smaller than the length of the second drainage section 112 of the evaporation plate 110 of the layer 11 evaporation structure 100. In the whole, the arrangement mode of the evaporating plates 110 of the evaporating structures 100 from the 1 st layer to the 12 th layer is matched with the distribution condition of the flue gas at the flue gas inlet 200 of the desulfurization absorption tower in space, so that the heat energy of low-temperature flue gas is reasonably utilized, materials are saved, the manufacturing cost is reduced, and other components can be structurally avoided.
The invention also provides a low-temperature flue gas concentrating device with a device for concentrating desulfurization wastewater by using waste heat, which comprises a smoke inlet 200 and the device for concentrating desulfurization wastewater by using waste heat, which is provided by any specific embodiment. The smoke inlet is of a trapezoid hollow structure, side plates are arranged on two opposite sides, and a partition plate is arranged in the middle. The plane of each layer of evaporation plate of the evaporation structure is parallel to the axial direction of the smoke inlet, the lower end of the evaporation plate of at least one layer of evaporation structure is fixedly connected with the side plate on one side of the evaporation plate, and the higher end of the evaporation plate of at least one layer of evaporation structure is fixedly connected with the side plate on the other side of the evaporation plate. Specifically, the common side of the lower ends of the third drainage sections 113 of the evaporation plates 110 of the 1 st to 6 th evaporation structures 100 can be fixedly connected with one side plate of the smoke inlet 200 of the desulfurization absorption tower, and the common side of the upper ends of the first drainage sections 111 of the evaporation plates 110 of the 1 st to 5 th evaporation structures 100 and the first drainage sections 111 of the evaporation plates 110 of the 7 th to 12 th evaporation structures 100 can be fixedly connected with the other side plate of the smoke inlet 200 of the desulfurization absorption tower. The first drainage section 111 of the evaporation plate 110 of the 6 th layer evaporation structure 100 is not fixedly connected with the other side wall of the smoke inlet 200 of the desulfurization absorption tower, and the higher end coincides with the projection of the lower end of the first drainage section 111 of the evaporation plate 110 of the 5 th layer evaporation structure 100 in the vertical direction, so as to structurally avoid the partition plate of the smoke inlet 200. Before the low-temperature flue gas enters the flue gas inlet 200 of the desulfurizing tower, the low-temperature flue gas flows through the top side and the bottom side of the evaporating plate 110 of each layer of evaporating structure 100 along the body width direction of the evaporating plate 110 of each layer of evaporating structure 100, so that the desulfurizing waste water flowing through the top side of the evaporating plate 110 of each layer of evaporating structure 100 can reasonably utilize the heat energy of the low-temperature flue gas.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," "one particular embodiment," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, within the scope of the present invention, should be covered by the protection scope of the present invention by equally replacing or changing the technical scheme and the inventive concept thereof.
Claims (3)
1. An apparatus for concentrating desulfurization waste water using waste heat, comprising:
the device comprises an evaporation structure, a water storage tank, a circulating pump, a water supplementing pipe and a water collecting pipe;
the evaporation structures are multiple and are layered along the vertical direction; each layer of evaporation structure is fixed at the smoke inlet of the desulfurization absorption tower;
the top of the water storage tank is provided with an input port, and the lower part of one side is provided with an output port;
the input end of the circulating pump is communicated with the output port of the water storage tank, and the output end of the circulating pump is communicated with the water supplementing pipe;
the water supplementing pipe is vertically arranged and communicated with at least one layer of the evaporation structure;
the water collecting pipe is vertically arranged and is respectively communicated with at least one layer of the evaporation structure and the input port of the water storage tank;
each layer of evaporation structure comprises an evaporation plate, a water distributor and a recovery tank; the evaporation plate is obliquely arranged; the water distributor is arranged above the higher end of the evaporation plate and can distribute water to the surface of the evaporation plate; at least one layer of the water distributor of the evaporation structure is communicated with the water supplementing pipe; the recovery groove is arranged at the lower end of the evaporation plate; the recovery tank of at least one layer of the evaporation structure is communicated with the water collecting pipe;
the water distributor is of a strip hollow structure, the axial direction of the water distributor is the same as the body width direction of the evaporation plate, the bottom end of the water distributor is fixedly connected with the higher end of the evaporation plate, and one side of the water distributor, which faces the lower end of the evaporation plate, is provided with a water distribution hole which faces the top surface of the evaporation plate;
the water distribution holes of the water distributor are of a fine strip structure, and two ends of the water distribution holes extend along the axial direction of the water distributor;
each layer of evaporation structure also comprises a smoke blocking strip; one side of the smoke baffle strip is fixedly connected with the upper part of one side of the water distributor, which is provided with the water distribution holes, the opposite side is a free side, and extends towards the top surface of the evaporation plate so as to shield the water distribution holes, so that the water distribution holes are positioned in a relatively closed space formed by the smoke baffle strip and the evaporation plate;
at least one layer of the evaporation plate of the evaporation structure comprises a first drainage section; the first drainage section is obliquely arranged, the section of the first drainage section is of a linear structure, a water distributor of the evaporation structure is arranged above the higher end of the first drainage section, and a recovery tank of the evaporation structure is arranged at the lower end of the first drainage section; at least one layer of evaporation plate of the evaporation structure further comprises a second drainage section; the second drainage section is integrally arranged below the first drainage section, is obliquely arranged, has an arc-shaped cross section, is fixedly connected with the lower end of the first drainage section at the higher end, and is provided with the recovery groove below the lower end; at least one layer of evaporation plate of the evaporation structure further comprises a third drainage section; the third drainage section is integrally arranged below the second drainage section and is also obliquely arranged, the section of the third drainage section is of a linear structure, the higher end of the third drainage section is fixedly connected with the lower end of the second drainage section, and the lower end of the third drainage section is provided with the recovery groove;
the number of the evaporation structures is 12; the evaporation plate of the evaporation structure from layer 1 to layer 8 comprises the first drainage section, the second drainage section and the third drainage section; the evaporation plate of the evaporation structure from the 9 th layer to the 10 th layer comprises a first drainage section and a second drainage section; the evaporation plate of the evaporation structure of 11 th to 12 th layers comprises the first drainage section.
2. The apparatus for concentrating desulfurization waste water by using waste heat according to claim 1, wherein the recovery tank has a structure of a long hollow shape with an open top end, and has the same axial direction as the body width direction of the evaporation plate, and the top end of one side wall is fixedly connected to the lower end of the evaporation plate.
3. A low-temperature flue gas desulfurization waste water concentrating device, which is characterized by comprising a flue gas inlet and the waste heat desulfurization waste water concentrating device according to claim 2;
the smoke inlet is of a trapezoid hollow structure, two opposite sides are provided with side plates, and the middle part is provided with a partition plate;
the plane of the evaporation plate of each layer of the evaporation structure is parallel to the axial direction of the smoke inlet; the lower end of the evaporation plate of at least one layer of the evaporation structure is fixedly connected with the side plate on one side of the evaporation structure, and the higher end of the evaporation plate of at least one layer of the evaporation structure is fixedly connected with the side plate on the other side of the evaporation structure.
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| CN213803337U (en) * | 2020-11-03 | 2021-07-27 | 山东国舜建设集团有限公司 | Multilayer plate type low-salt wastewater evaporation concentration device with built-in flue |
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2021
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|---|---|---|---|---|
| TW201130742A (en) * | 2010-03-05 | 2011-09-16 | Bin-Juine Huang | Diffusion type multi-effect distillation system |
| CN103827041A (en) * | 2010-09-17 | 2014-05-28 | 李种华 | Apparatus for evaporating and condensing wastewater and system for evaporating and condensing wastewater |
| CN206279034U (en) * | 2016-11-16 | 2017-06-27 | 四川苏源环保工程有限公司 | Airflow on surface forced evaporation concentration-type waste water from power plant device |
| CN213803337U (en) * | 2020-11-03 | 2021-07-27 | 山东国舜建设集团有限公司 | Multilayer plate type low-salt wastewater evaporation concentration device with built-in flue |
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