Partitioned strong heat exchange falling film evaporator based on forward guide flow

Abstract

The application discloses a partitioned strong heat exchange falling film evaporator based on forward flow guiding, belongs to the technical field of falling film evaporators, and is characterized in that the upper end of a falling film evaporator main body is provided with a shunt guide plate, guide ports are formed in the shunt guide plate, a dispersion plate is installed below the shunt guide plate, assembling ports are formed in the dispersion plate, guide pipes are installed on the assembling ports in correspondence, a partition plate is installed in a penetrating mode through the shaft center of the falling film evaporator main body, the main body is divided into two independent cavities along the shaft center, two kinds of materials are processed in a partitioned mode, are not mixed with each other, different materials are respectively transported to the two cavities separated by the partition plate, double-material independent feeding is realized, the equipment can simultaneously perform independent feeding, partitioned liquid distribution and falling film evaporation on two kinds of different materials, can process the two kinds of materials in parallel, the flow distribution is uniform, the evaporation efficiency is improved, the double-cavity structure formed by the partition plate can independently match the use requirements of different process temperatures and different material processing amounts, and the equipment has stronger adaptability.

Description

Technical Field

[0001] This invention relates to a falling film evaporator, and more particularly to a zoned, high-heat-exchange falling film evaporator based on forward flow, belonging to the technical field of falling film evaporators. Background Technology

[0002] Falling film evaporation involves adding the feed liquid from the upper tube box of the heating chamber of the falling film evaporator. The feed liquid is evenly distributed into each heat exchange tube and flows down the inner wall of the heat exchange tube in a uniform film. During the flow of the feed liquid, it is heated and vaporized by the heating medium. The generated vapor and liquid phase enter the separation chamber of the evaporator together. After thorough separation, the vapor enters the condenser for condensation or enters the next effect evaporator as the heating medium, thus achieving multi-effect operation. The liquid phase is discharged from the separation chamber.

[0003] Existing falling film evaporators are mostly single-chamber structures with large chamber volumes, slow heating rates, no inter-chamber heat conduction preheating mechanism, low thermal energy utilization, and high energy consumption.

[0004] The temperature control method is singular, and it cannot control temperature in different zones, so it cannot meet the needs of different process temperatures and different material processing volumes. The equipment has poor adaptability and versatility.

[0005] The response to operating condition adjustments is lagging, energy efficiency decreases when operating at low loads, and overall production flexibility is insufficient.

[0006] To overcome the following: Existing falling film evaporators are mostly single-chamber structures with large chamber volumes, slow heating rates, no inter-chamber heat conduction preheating mechanism, low thermal energy utilization, and high energy consumption;

[0007] The temperature control method is singular, and it cannot control temperature in different zones, so it cannot meet the needs of different process temperatures and different material processing volumes. The equipment has poor adaptability and versatility.

[0008] The problems of delayed response to operating conditions, decreased energy efficiency during low-load operation, and insufficient overall production flexibility necessitate the improvement and optimization of a zoned, high-heat-exchange falling film evaporator based on forward flow. Summary of the Invention

[0009] The main objective of this invention is to overcome the following: existing falling film evaporators are mostly single-chamber structures with large chamber volumes, slow heating rates, no inter-chamber heat conduction preheating mechanism, low thermal energy utilization, and high energy consumption.

[0010] The temperature control method is singular, and it cannot control temperature in different zones, so it cannot meet the needs of different process temperatures and different material processing volumes. The equipment has poor adaptability and versatility.

[0011] To address the issues of delayed response to operating conditions, decreased energy efficiency during low-load operation, and insufficient overall production flexibility, a zoned, forced-heat-exchange falling film evaporator based on forward flow is proposed.

[0012] The objective of this invention can be achieved by adopting the following technical solution:

[0013] A partitioned, high-heat-exchange falling film evaporator based on forward flow, comprising a falling film evaporator body for heat exchange during material handling;

[0014] A flow divider guide plate is installed at the upper end of the main body of the falling film evaporator, and guide ports are respectively opened on the flow divider guide plate. A dispersion plate is installed below the partition plate.

[0015] The dispersion plate has an assembly port, and a guide tube is installed on the assembly port accordingly;

[0016] The falling film evaporator body is equipped with a baffle plate installed along the axial through-section. By dividing the interior of the body into two independent chambers along the axis, two types of materials can be processed separately without mixing. Different materials are fed into the two chambers separated by the baffle plate, achieving independent feeding of two different materials. The equipment can simultaneously feed two different materials independently, distribute liquid in different areas, and perform falling film evaporation, taking into account the parallel processing of two materials, uniform distribution, and improving evaporation efficiency.

[0017] Preferably, the top of the falling film evaporator body is equipped with a feeding port one and a feeding port two, which are respectively connected to the cavities on the falling film evaporator body separated by a partition.

[0018] Preferably, a heating steam inlet is symmetrically installed in the middle section of the falling film evaporator body, a heating steam condensate outlet is installed below the heating steam inlet, and a concentrate outlet is installed at the lower end of the falling film evaporator body.

[0019] Preferably, a gas phase channel is installed on the outer side of the falling film evaporator body. This structure achieves the following functions: collecting the secondary steam generated by falling film evaporation, guiding the orderly flow of the gas phase medium, avoiding airflow turbulence, preventing droplet entrainment in conjunction with the evaporation structure, reducing the liquid content of the steam, improving gas phase purity, balancing the gas phase pressure inside the evaporator, ensuring stable evaporation conditions in all areas of the equipment, and smoothly transporting the qualified gas phase medium to the next process for condensation, recovery, and reuse, etc.

[0020] Preferably, a material collection chamber is formed between the dispersing plate and the flow guide plate. By guiding and evenly distributing the material entering the chamber, the material is uniformly distributed, further dispersed and allocated, and precisely guided to the evaporation heat exchange area to form a uniform liquid film, ensuring the function of evaporation heat exchange.

[0021] Preferably, the feeding port one, feeding port two, dispersion plate and conduit are connected.

[0022] Preferably, one end of the gas phase channel is connected to the main body of the falling film evaporator, and the gas phase channel consists of two sets, upper and lower.

[0023] Preferably, the falling film evaporator body is separated by conduits for material feeding, the falling film evaporator body is separately introduced with two sets of heating steam inlets, and the falling film evaporator body discharges material through the concentrate outlet.

[0024] Preferably, the conduit is inserted into the assembly port and communicates with the material collection chamber and the guide port.

[0025] Preferably, the interior of the falling film evaporator body is divided into two independent chambers by a partition.

[0026] Beneficial technical effects of the present invention:

[0027] The present invention provides a partitioned strong heat exchange falling film evaporator based on forward flow. First, the first feeding port and the second feeding port need to be connected to the external feeding device, the heating steam inlet is connected to the steam supply equipment, the gas phase channel is connected to the separator, the heating steam condensate outlet is connected to the condensate recovery component, and the concentrate outlet is connected to the finished product receiving device to complete the assembly of the whole machine piping.

[0028] The material is fed into the main body of the falling film evaporator through the first or second feeding port, and is guided by the diversion guide plate and guide port in sequence. Then it is conveyed downward layer by layer through the dispersion plate, assembly port and conduit.

[0029] During the material's descent, high-temperature steam is introduced through the heating steam inlet to heat and evaporate the material. A baffle is installed in the middle of the main body of the falling film evaporator, dividing the internal cavity into two independent chambers to achieve dual-stage zoned temperature control.

[0030] When heating steam is introduced into one side chamber, the heat can be conducted to the other side chamber through the partition to preheat the inside of the chamber. Heating steam can also be introduced into both side chambers at the same time. The separated independent operating chambers effectively reduce the volume of a single chamber and can significantly improve the heating rate of both side chambers.

[0031] The dual-chamber structure formed by the partition can independently match the usage requirements of different process temperatures and different material processing volumes, making the equipment more adaptable. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a preferred embodiment of a zoned strong heat exchange falling film evaporator based on forward flow according to the present invention.

[0033] Figure 2 This is a side view of a preferred embodiment of a zoned, high-heat-exchange falling film evaporator based on forward flow according to the present invention;

[0034] Figure 3This is an internal bottom perspective view of a preferred embodiment of a zoned strong heat exchange falling film evaporator based on forward flow according to the present invention;

[0035] Figure 4 This is an internal bottom view of a preferred embodiment of a zoned, high-heat-exchange falling film evaporator based on forward flow according to the present invention.

[0036] Figure 5 AA\BB diagram is a preferred embodiment of a zoned strong heat exchange falling film evaporator based on forward flow according to the present invention;

[0037] Figure 6 A cross-sectional view (AA) of a preferred embodiment of a zoned, high-heat-exchange falling film evaporator based on forward flow according to the present invention;

[0038] Figure 7 This is a BB cross-sectional view of a preferred embodiment of a zoned strong heat exchange falling film evaporator based on forward flow according to the present invention.

[0039] In the diagram: 1. Falling film evaporator body; 101. Feed port one; 102. Feed port two; 103. Heating steam inlet; 104. Vapor phase passage; 105. Heating steam condensate outlet; 106. Concentrate outlet;

[0040] 2. Partition plate; 201. Guide tube; 203. Dispersion plate; 204. Assembly port; 205. Diversion guide plate; 206. Guide port; 207. Collection chamber. Detailed Implementation

[0041] To enable those skilled in the art to understand the technical solution of the present invention more clearly, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0042] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, this embodiment provides a partitioned strong heat exchange falling film evaporator based on forward flow, including a falling film evaporator body 1 for material handling heat exchange;

[0043] A flow divider guide plate 205 is installed at the upper end of the falling film evaporator body 1. A guide port 206 is opened on the flow divider guide plate 205 respectively. A dispersion plate 203 is installed below the partition plate 2.

[0044] The dispersion plate 203 has an assembly port 204, and a guide tube 201 is installed on the assembly port 204 accordingly;

[0045] The falling film evaporator body 1 has a partition plate 2 installed in the axial through-section.

[0046] The top of the falling film evaporator body 1 is equipped with a feeding port 101 and a feeding port 102, which are respectively connected to the cavity on the falling film evaporator body 1 separated by the partition plate 2.

[0047] A heating steam inlet 103 is symmetrically installed in the middle section of the falling film evaporator body 1, a heating steam condensate outlet 105 is installed below the heating steam inlet 103, and a concentrate outlet 106 is installed at the lower end of the falling film evaporator body 1.

[0048] A gas phase channel 104 is installed on the outer side of the falling film evaporator body 1.

[0049] A material collection chamber 207 is formed between the dispersing plate 203 and the diversion guide plate 205.

[0050] The feeding port 101, feeding port 202, falling film evaporator body 1, and conduit 201.

[0051] One end of the gas phase channel 104 is connected to the falling film evaporator body 1, and the gas phase channel 104 consists of two sets, upper and lower.

[0052] The falling film evaporator body 1 is guided by a conduit 201, and steam is introduced by two sets of heating steam inlets 103. The falling film evaporator body 1 discharges the material through the concentrate outlet 106.

[0053] The conduit 201 is inserted into the assembly port 204 and communicates with the collection chamber 207 and the guide port 206.

[0054] The interior of the falling film evaporator body 1 is divided into two independent chambers by a partition 2.

[0055] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, firstly, the first feeding port 101 and the second feeding port 102 need to be connected to the external feeding device, the heating steam inlet 103 is connected to the steam supply equipment, the gas phase channel 104 is connected to the separator, the heating steam condensate outlet 105 is connected to the condensate recovery component, and the concentrate outlet 106 is connected to the finished product receiving device to complete the assembly of the entire machine's pipeline.

[0056] The material is fed into the body 1 of the falling film evaporator through the first feeding port 101 or the second feeding port 102, and is guided by the diversion guide plate 205 and the guide port 206 in sequence. Then it is conveyed downward layer by layer through the dispersion plate 203, the assembly port 204 and the conduit 201.

[0057] During the material falling process, high-temperature steam is introduced through heating steam inlet 103 to heat and evaporate the material.

[0058] A partition 2 is provided in the middle of the main body 1 of the falling film evaporator, which divides the inner cavity of the equipment into two independent chambers to achieve dual-stage zone temperature control;

[0059] When heating steam is introduced into one side chamber, the heat can be conducted to the other side chamber through the partition to preheat the inside of the chamber. Heating steam can also be introduced into both side chambers at the same time. The separated independent operating chambers effectively reduce the volume of a single chamber and can significantly improve the heating rate of both side chambers.

[0060] The dual-chamber structure formed by the partition can independently match the usage requirements of different process temperatures and different material processing volumes, making the equipment more adaptable.

[0061] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A partitioned strong heat exchange falling film evaporator based on forward flow, comprising a falling film evaporator body (1) for heat exchange during material handling. Its features are: The upper end of the falling film evaporator body (1) is equipped with a flow divider guide plate (205), and the flow divider guide plate (205) is provided with guide ports (206). A dispersion plate (203) is installed below the partition plate (2). The dispersing plate (203) has an assembly port (204), and a guide tube (201) is installed on the assembly port (204). The falling film evaporator body (1) has a partition plate (2) installed in the axial through-section.

2. The partitioned, high-heat-exchange falling film evaporator based on forward flow as described in claim 1, characterized in that: The top of the falling film evaporator body (1) is equipped with a feeding port one (101) and a feeding port two (102), which are respectively connected to the cavity on the falling film evaporator body (1) separated by the partition plate (2).

3. A partitioned strong heat transfer falling film evaporator based on the forward guide flow according to claim 2, characterized in that: A heating steam inlet (103) is symmetrically installed in the middle section of the falling film evaporator body (1), a heating steam condensate outlet (105) is installed below the heating steam inlet (103), and a concentrate outlet (106) is installed at the lower end of the falling film evaporator body (1).

4. A partitioned strong heat transfer falling film evaporator based on the forward guide flow according to claim 3, characterized in that: A gas phase channel (104) is installed on the outside of the main body (1) of the falling film evaporator.

5. A partitioned strong heat transfer falling film evaporator based on the forward guide flow according to claim 4, characterized in that: A material collection chamber (207) is formed between the dispersing plate (203) and the diversion guide plate (205).

6. A partitioned strong heat transfer falling film evaporator based on the forward guide flow according to claim 5, characterized in that: The feeding port 1 (101), feeding port 2 (102), dispersing plate (203), and conduit (201) are connected.

7. A partitioned strong heat transfer falling film evaporator based on the forward guide flow according to claim 6, characterized in that: One end of the gas phase channel (104) is connected to the main body (1) of the falling film evaporator, and the gas phase channel (104) consists of two sets, upper and lower.

8. A partitioned strong heat transfer falling film evaporator based on the forward guide flow according to claim 7, characterized in that: The falling film evaporator body (1) is separated by a conduit (201) for material feeding. The falling film evaporator body (1) is separated by two sets of heating steam inlets (103) for steam introduction. The falling film evaporator body (1) discharges material through the concentrate outlet (106).

9. A partitioned strong heat transfer falling film evaporator based on the forward guide flow according to claim 8, characterized in that: The conduit (201) is inserted into the assembly port (204) and communicates with the collection chamber (207) and the guide port (206).

10. A partitioned, high-heat-exchange falling film evaporator based on forward flow as described in claim 9, characterized in that: The interior of the falling film evaporator body (1) is divided into two independent cavities by a partition (2).

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