Horizontal pipe evaporation concentrator

Abstract

The utility model discloses a horizontal pipe evaporation concentrator, which comprises a separator, the separator comprises a hollow shell, a live steam inlet, a condensate water outlet, a material inlet, a concentrated solution outlet and a secondary steam outlet are arranged on the shell, a heater and a spraying assembly are arranged in the shell, the spraying assembly comprises a spraying pipe and a nozzle, the heater comprises a horizontal heating pipe, and the nozzle is arranged in the shell. The plurality of heating pipes are sequentially communicated to form a snakelike heating channel; a feeding pump and a circulating pump; and a condensation assembly. According to the horizontal pipe evaporation concentrator, the spraying assembly and the heater are concentrated in the separator, the compactness of the equipment structure is guaranteed, the occupied space is reduced, feed liquid is sprayed to the heating pipe into which live steam is introduced through the spraying assembly, so that the feed liquid flows down in a film shape under gravity, heat transfer is promoted, meanwhile, it is guaranteed that the feed liquid is heated stably and uniformly, and the efficiency is improved. Therefore, the heating effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to evaporative concentrator technical field especially is related to a horizontal tube evaporative concentrator. BACKGROUND

[0002] Evaporative concentrator is a kind of device using heat energy drive, through heating makes the water in solution evaporate, to realize the concentration of solute, when the device runs, the solution into evaporator is heated by heater, the water in solution evaporates, forms steam, and the solution concentrates and discharges system.

[0003] In the prior art, while the feed liquid passes through the pipeline, live steam is transported outside the pipeline, and the live steam exchanges heat with the feed liquid inside the pipeline. When the feed liquid is heated in this way, the heat transfer efficiency is low, and a large temperature difference between the live steam and the feed liquid is required to achieve the heating effect. After the material is heated, it is introduced into the separator for concentration and evaporation. The heater and the separator are two separate entities, which need to be installed separately, resulting in a large overall space occupation of the evaporative concentrator.

[0004] Therefore, it is necessary to improve the evaporative concentrator in the prior art. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at overcoming the defects in the prior art, and provides a horizontal tube evaporative concentrator with improved heat transfer efficiency, reduced heat transfer temperature difference loss and compact structure and small space occupation.

[0006] To achieve the above technical effects, the technical scheme of the utility model is as follows: a horizontal tube evaporative concentrator, comprising:

[0007] A separator, the separator includes a hollow shell, the shell is provided with a live steam inlet, a condensed water outlet, a material inlet, a concentrated liquid outlet and a secondary steam outlet, the shell is provided with a heater and a spray assembly arranged above the heater, the spray assembly includes a spray pipe and a spray head arranged below the spray pipe and facing the heater, the spray head is communicated with the material inlet through the spray pipe, the concentrated liquid outlet is located below the heater and communicated with the inner cavity of the shell, the secondary steam outlet is located above the spray assembly and communicated with the inner cavity of the shell, the heater includes a plurality of horizontal heating pipes, and the plurality of heating pipes are sequentially communicated to form a serpentine heating channel, and the two ends of the heating channel are communicated with the live steam inlet and the condensed water outlet respectively.

[0008] A feed pump and a circulating pump, the input end of the circulating pump is communicated with the output end of the feed pump and the concentrated liquid outlet, and the output end of the circulating pump is communicated with the material inlet.

[0009] a condensing assembly for condensing the secondary steam discharged from the secondary steam outlet into condensed water and discharging the condensed water out of the system.

[0010] Preferably, in order to ensure the length of the heating pipe and improve the compactness of the internal structure of the device, the two ends of the heating pipe are in close proximity to the inner walls of the two ends of the shell.

[0011] Preferably, in order to improve the heating effect, the heating pipe is provided with multiple layers, and the adjacent two layers of the heating pipe are in close proximity.

[0012] Preferably, in order to improve the compactness of the internal structure of the device and further improve the heating effect, each layer of the heating pipe is provided with multiple heating pipes, which are distributed along the width direction of the shell and in close proximity to each other in the same layer.

[0013] Preferably, in order to condense the secondary steam discharged from the separator, the condensing assembly comprises a condenser, a condensed water tank and a condensed water pump, the condenser has a cooling inlet, a cooling outlet, a secondary steam inlet and a condensing outlet, the cooling inlet and the cooling outlet are used for passing in and discharging cooling water respectively, the secondary steam inlet and the condensing outlet are communicated with the secondary steam outlet and the condensed water tank respectively, the input end of the condensed water pump is communicated with the condensed water tank, and the output end is communicated with the outside.

[0014] Preferably, in order to facilitate the discharge of non-condensable gas, the condensing assembly further comprises a vacuum pump, the input end of the vacuum pump is communicated with the top of the condensed water tank, and the output end is communicated with the outside.

[0015] Preferably, in order to realize the dredging and cleaning of the pipeline and avoid pipe blockage, the output end of the condensed water pump is further communicated with three cleaning pipes, each of which is provided with a cleaning valve, and the ends of the three cleaning pipes far away from the output end of the condensed water pump are respectively communicated with the inner cavity of the shell, the heating channel and the output end of the circulating pump.

[0016] Preferably, in order to facilitate maintenance, switching assemblies are arranged between the output end of the feed pump and the input end of the circulating pump, between the output end of the circulating pump and the outside, on the feed side of the live steam inlet and on the discharge side of the condensed water outlet, the switching assembly comprises two switching pipes arranged in parallel, and each of the two switching pipes is provided with a switching valve.

[0017] Preferably, in order to facilitate the cleaning of the pipelines of the input end and the output end of the feed pump and facilitate the smooth feeding of the liquid into the separator, the input end of the feed pump is communicated with an industrial water inlet pipe, and the output end is communicated with a backflow pipe, the industrial water inlet pipe and the backflow pipe are respectively connected with an inflow valve and a backflow valve.

[0018] In summary, the horizontal tube evaporation concentrator of the utility model compared with prior art, the spray assembly and heater are centralized in the separator, guarantee equipment compactness, reduce the occupied space, through the spray assembly sprays the material liquid on the heating pipe which passes in the inside live steam, make the material liquid in the gravity in the film shape flow down, promote the heat transfer at the same time guarantee the material liquid heated stable and uniform, reduce the temperature difference loss, thereby improve the heating effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the structure schematic diagram of the utility model;

[0020] Figure 2 is the structure schematic diagram of the separator of the utility model;

[0021] Figure 3 is the connection structure schematic diagram of the heating pipe in the separator of the utility model;

[0022] Figure 4 is the schematic diagram of the material liquid that the spray head sprays downward on the outer lateral wall of the heating pipe;

[0023] Figure 5 is the structure schematic diagram of the device for processing material liquid of the utility model;

[0024] Figure 6 is the structure schematic diagram of the device for processing steam and condensate of the utility model;

[0025] In the drawing: 1, separator;101, live steam inlet;102, condensate outlet;103, material inlet;104, concentrated liquid outlet;105, secondary steam outlet;11, heater;111, heating pipe;12, spray assembly;121, spray pipe;122, spray head;2, feed pump;201, industrial water inlet pipe;202, backflow pipe;203, flow valve;204, backflow valve;3, circulating pump;4, condenser;401, cooling inlet;402, cooling outlet;403, secondary steam inlet;404, condensing outlet;5, condensate tank;6, condensate pump;601, cleaning pipe;602, cleaning valve;7, vacuum pump;8, switching assembly;801, switching pipe;802, switching valve. DETAILED DESCRIPTION

[0026] The specific implementation of the utility model will be further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0027] As Figures 1-6 shown, the horizontal tube evaporation concentrator of the utility model, comprising:

[0028] The separator 1 comprises a hollow shell, the shell is provided with a live steam inlet 101, a condensed water outlet 102, a material inlet 103, a concentrated liquid outlet 104 and a secondary steam outlet 105, the shell is provided with a heater 11 and a spray assembly 12 arranged directly above the heater 11, the spray assembly 12 comprises a spray pipe 121 and a spray head 122 arranged below the spray pipe 121 and facing the heater 11, the spray head 122 is communicated with the material inlet 103 through the spray pipe 121, the concentrated liquid outlet 104 is located below the heater 11 and communicated with the inner cavity of the shell, the secondary steam outlet 105 is located above the spray assembly 12 and communicated with the inner cavity of the shell, the heater 11 comprises a plurality of horizontal heating pipes 111, the plurality of heating pipes 111 are sequentially communicated to form a serpentine heating channel, and the two ends of the heating channel are communicated with the live steam inlet 101 and the condensed water outlet 102 respectively;

[0029] A feed pump 2 and a circulating pump 3, the input end of the circulating pump 3 is communicated with the output end of the feed pump 2 and the concentrated liquid outlet 104, and the output end of the circulating pump 3 is communicated with the material inlet 103;

[0030] A condensing assembly, the condensing assembly is used for condensing the secondary steam discharged from the secondary steam outlet 105 to form condensed water and then discharging the condensed water from the system.

[0031] In use, the solution containing solute, i.e. the material liquid, is delivered to the input end of the circulating pump 3 by the feed pump 2, the material liquid is delivered into the separator 1 by the circulating pump 3, the material liquid enters the spray pipe 121 of the spray assembly 12 from the material inlet 103, and then is sprayed downward from the spray head 122 and falls into the heating pipes 111 of the heater 11, at the same time, the live steam source delivers live steam to the heating pipes 111 through the live steam inlet 101, so that the live steam forms condensed water after passing through the serpentine heating channel formed by the plurality of heating pipes 111 in sequence, and the condensed water is discharged from the condensed water outlet 102 and flows out from the condensed water outlet 102.

[0032] The heating pipes 111 are axially horizontal, the material liquid sprayed by the spray head 122 flows downward along the outer wall of the heating pipes 111 in a film shape under the action of gravity, like Figure 4As shown, the liquid film formed by the feed liquid is very thin, and the thickness is much smaller than the thickness of the tube wall of the heating tube 111, so that the liquid film has a fluctuation property, and such film flow is beneficial to the heat transfer between the liquid film and the tube wall of the heating tube 111, so that the heat can be quickly and uniformly transferred, thereby improving the heat transfer coefficient and improving the heating effect of the feed liquid. The heat transfer mode of the falling film outside the tube enables the separator 1 to perform heat transfer at a smaller temperature difference; Furthermore, the heater 11 composed of the horizontal heating tube 111 does not have heat loss caused by the boiling point rise due to the liquid level static pressure, and the feed liquid flows downward in a film shape, and the temperature rises during the heat exchange process with the tube wall, and the feed liquid is gradually concentrated, and the average concentration of the evaporated feed liquid is lower than the concentration of the complete liquid, and the temperature loss caused by the boiling point rise of the solution is also reduced.

[0033] In addition, the heater 11 and the spraying assembly 12 are integrated in the shell of the separator 1, so that the structure of the separator 1 is more compact, and the equipment occupied space can be reduced; Furthermore, during the evaporation process, the feed liquid is concentrated outside the heating tube 111, and the film formation and fouling can be easily observed and measured. Compared with other types of evaporators, the feed liquid is difficult to find in the pipe. The tube heating evaporation mode of the utility model is more conducive to the intuitive understanding of the evaporation and concentration of the feed liquid by the operator, and the operation parameters can be easily adjusted and the related maintenance operation can be performed.

[0034] After the feed liquid is concentrated, the concentrated liquid is discharged out of the shell of the separator 1 through the concentrated liquid outlet 104, and the concentrated feed liquid can be returned to the separator 1 through the circulating pump 3 to continue the evaporation and concentration. When the concentration of the feed liquid is concentrated to a predetermined concentration, the concentrated liquid is discharged out of the system by the circulating pump 3.

[0035] During the evaporation and concentration process, the secondary steam generated by the evaporation of the feed liquid is condensed by the condensing assembly, and the condensed water is discharged out of the system.

[0036] It should be noted that the horizontal tube evaporation concentrator of the utility model is mainly used for the concentration treatment of the following materials:

[0037] I. Heat-sensitive materials: such materials are sensitive to temperature, and high temperature or long heating time will cause changes in properties, quality decline or even deterioration. The solution in the separator 1 flows along the outer wall of the heating tube 111 in a film shape under the action of gravity, exchanges heat with the heating medium (mainly live steam) in the heating tube 111, and the material stays in the separator 1 for a short time, which can effectively avoid problems such as deterioration caused by long-time heating;

[0038] II. Low viscosity material: the low viscosity material can form a uniform liquid film on the outer wall of the heating tube 111, which is beneficial to heat transfer and evaporation process. If the viscosity of the material is high, the liquid film may not be continuous, which affects the heat transfer efficiency;

[0039] III. Non-crystallizable and non-scaling materials: when the material is easily crystallized or scaled, precipitates or scale layers may appear on the outer wall of the heating tube 111 in the separator 1, which will destroy the film formation of the solution on the tube wall, thereby greatly reducing the heat transfer efficiency. Therefore, non-crystallizable and non-scaling materials are more suitable for evaporation in the separator 1.

[0040] Further improvement is that the two ends of the heating tube 111 are in close proximity to the inner walls of the two ends of the shell; the heating tube 111 is provided with multiple layers, and the adjacent two layers of the heating tube 111 are in close proximity; each layer of the heating tube 111 is provided with multiple heating tubes 111, which are distributed along the width direction of the shell and in close proximity in the same layer.

[0041] After adopting the above structure, in the limited space of the separator 1 shell, the length of the heating tube 111 is ensured, so that the heating channel has sufficient length, thereby ensuring the heat exchange contact area between the liquid film and the tube wall of the heating tube 111, and improving the heat exchange amount; in addition, the heating tube 111 is divided into multiple layers, and each layer is provided with multiple heating tubes 111, and the heating tubes 111 in each layer and between layers are in close proximity, which ensures the compactness of the distribution structure of the heating tube 111, increases the contact area between the liquid film and the tube wall of the heating tube 111, and ensures the uniformity of heat exchange and the stability of heat transfer coefficient.

[0042] Further improvement is that the condensing assembly includes a condenser 4, a condensate tank 5 and a condensate pump 6, the condenser 4 has a cooling inlet 401, a cooling outlet 402, a secondary steam inlet 403 and a condensing outlet 404, the cooling inlet 401 and the cooling outlet 402 are used for passing in and discharging cooling water respectively, the secondary steam inlet 403 and the condensing outlet 404 are communicated with the secondary steam outlet 105 and the condensate tank 5 respectively, the input end of the condensate pump 6 is communicated with the condensate tank 5, and the output end is communicated with the outside; the condensing assembly further includes a vacuum pump 7, the input end of the vacuum pump 7 is communicated with the top of the condensate tank 5, and the output end is communicated with the outside.

[0043] After the material liquid exchanges heat with the steam in the heating tube 111 in the separator 1, the solution is heated and evaporated to form secondary steam flowing upward, which is discharged through the secondary steam outlet 105, enters the condenser 4 through the secondary steam inlet 403, at the same time, the cooling water enters the condenser 4 through the cooling inlet 401 and exchanges heat with the secondary steam, and then flows out from the cooling outlet 402, after the secondary steam exchanges heat with the cooling water, condensate is formed, which is discharged through the condensing outlet 404 and enters the condensate tank 5, the condensate is collected in the condensate tank 5, and the condensate pump 6 is used to conveniently discharge the condensate in the condensate tank 5 from the system.

[0044] In the evaporation process, the air and other non-condensable gases mixed in the secondary steam will not be condensed. These non-condensable gases enter the condenser 4 under the action of the vacuum pump 7, flow through the condenser water tank 5, and are finally sucked into the system by the vacuum pump 7 and discharged outside the system.

[0045] Further improvement is that the output end of the condenser water pump 6 is also communicated with three cleaning pipes 601, and each cleaning pipe 601 is provided with a cleaning valve 602. The ends of the three cleaning pipes 601 away from the output end of the condenser water pump 6 are respectively communicated with the inner cavity of the shell, the heating channel, and the output end of the circulating pump 3.

[0046] After adopting the above structure, the cleaning valve 602 is opened, the condenser water in the condenser water tank 5 is extracted by the condenser water pump 6, and the condenser water is input into the shell, the heating channel, and the pipeline connected to the output end of the circulating pump 3 through the three cleaning pipes 601 respectively. The condenser water is input into the above-mentioned pipeline to flush and clean, remove the impurities such as precipitates or crystals accumulated in the pipeline, prevent the pipeline from being blocked due to material residues, and ensure the stable evaporation and concentration.

[0047] Further improvement is that the output end of the condenser water pump 6 is also communicated with three cleaning pipes 601, and each cleaning pipe 601 is provided with a cleaning valve 602. The ends of the three cleaning pipes 601 away from the output end of the condenser water pump 6 are respectively communicated with the inner cavity of the shell, the heating channel, and the output end of the circulating pump 3.

[0048] The switching assembly 8 has two switching pipes 801 in parallel distribution. During equipment operation, the switching valve 802 corresponding to one of the switching pipes 801 is opened to facilitate the flow of fluid, and the switching valve 802 of the other switching pipe 801 is closed to facilitate maintenance operation of the switching pipe 801.

[0049] Further improvement is that the input end of the feed pump 2 is communicated with an industrial water inlet pipe 201, and the output end is communicated with a backflow pipe 202. The industrial water inlet pipe 201 and the backflow pipe 202 are respectively connected with an inflow valve 203 and a backflow valve 204.

[0050] After adopting the above structure, the inflow valve 203 and the backflow valve 204 can be opened to input industrial water into the industrial water inlet pipe 201. At the same time, the feed pump 2 is opened, so that the industrial water passes through the feed pump 2 and returns to the original liquid tank through the backflow pipe 202. The input end and the output end of the feed pump 2 are flushed and cleaned to ensure the normal and stable operation of the feed pump 2, so that the feed pump 2 can stably transport the material liquid for evaporation and concentration treatment to the phase separator 1.

[0051] The above merely is the preferred implementation manner of the present application, and it should be noted that, for the ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A horizontal tube evaporator concentrator, characterized in that, include: A separator (1) includes a hollow outer shell with a live steam inlet (101), a condensate outlet (102), a material inlet (103), a concentrate outlet (104), and a secondary steam outlet (105) provided on the outer shell. A heater (11) and a spray assembly (12) positioned directly above the heater (11) are provided inside the outer shell. The spray assembly (12) includes a spray pipe (121) and a nozzle (122) positioned below the spray pipe (121) and facing the heater (11). The spray pipe (121) is connected to the material inlet (103). The concentrated liquid outlet (104) is located below the heater (11) and is connected to the inner cavity of the shell. The secondary steam outlet (105) is located above the spray assembly (12) and is connected to the inner cavity of the shell. The heater (11) includes a plurality of horizontal heating pipes (111). The plurality of heating pipes (111) are connected in sequence to form a serpentine heating channel. The two ends of the heating channel are connected to the live steam inlet (101) and the condensate outlet (102), respectively. Feed pump (2) and circulation pump (3), wherein the input end of the circulation pump (3) is connected to the output end of the feed pump (2) and the concentrated liquid outlet (104), and the output end of the circulation pump (3) is connected to the material inlet (103); A condensing assembly is used to condense the secondary steam discharged from the secondary steam outlet (105) into condensate water before discharging it from the system.

2. The horizontal tube evaporator concentrator according to claim 1, characterized in that: The two ends of the heating tube (111) are respectively adjacent to the inner walls of the two ends of the outer shell.

3. The horizontal tube evaporator concentrator according to claim 2, characterized in that: The heating tube (111) is provided in multiple layers, with the heating tubes (111) of two adjacent layers distributed close together.

4. The horizontal tube evaporator concentrator according to claim 3, characterized in that: Each layer has multiple heating tubes (111), which are distributed along the width of the outer shell and adjacent heating tubes (111) in the same layer are closely arranged.

5. The horizontal tube evaporator concentrator according to claim 1, characterized in that: The condensation assembly includes a condenser (4), a condensate tank (5), and a condensate pump (6). The condenser (4) has a cooling inlet (401), a cooling outlet (402), a secondary steam inlet (403), and a condensate outlet (404). The cooling inlet (401) and the cooling outlet (402) are used to introduce cooling water and discharge cooling water, respectively. The secondary steam inlet (403) and the condensate outlet (404) are connected to the secondary steam outlet (105) and the condensate tank (5), respectively. The input end of the condensate pump (6) is connected to the condensate tank (5), and the output end is connected to the outside.

6. The horizontal tube evaporator concentrator according to claim 5, characterized in that: The condensation assembly also includes a vacuum pump (7), the input end of which is connected to the top of the condensate tank (5), and the output end is connected to the outside.

7. The horizontal tube evaporator concentrator according to claim 5, characterized in that: The output end of the condensate pump (6) is also connected to three cleaning pipes (601), and each cleaning pipe (601) is equipped with a cleaning valve (602). The ends of the three cleaning pipes (601) away from the output end of the condensate pump (6) are respectively connected to the inner cavity of the outer shell, the heating channel and the output end of the circulation pump (3).

8. The horizontal tube evaporator concentrator according to any one of claims 1-7, characterized in that: A switching assembly (8) is provided between the output end of the feed pump (2) and the input end of the circulation pump (3), between the output end of the circulation pump (3) and the outside, the feed side of the live steam inlet (101) and the discharge side of the condensate outlet (102). The switching assembly (8) includes two switching pipes (801) distributed in parallel, and each of the two switching pipes (801) is provided with a switching valve (802).

9. The horizontal tube evaporator concentrator according to any one of claims 1-7, characterized in that: The feed pump (2) has an industrial water inlet pipe (201) connected to its input end and a return pipe (202) connected to its output end. The industrial water inlet pipe (201) and the return pipe (202) are respectively connected to an inlet valve (203) and a return valve (204).

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