Horizontal evaporator for preparing water for injection

Abstract

The utility model relates to the technical field of evaporators, in particular to a horizontal evaporator for preparing water for injection, which comprises a shell, a water inlet pipe and a water outlet pipe are communicated on the shell, a heating element is arranged in the shell, a separation box is arranged in the shell, a steam inlet is arranged at the bottom of the separation box, and a steam outlet is arranged at the bottom of the separation box. The top of the separation box is communicated with a steam outlet pipe, the steam outlet pipe penetrates through the shell, a plurality of first flow guide plates are arranged in the separation box in the horizontal direction, second flow guide plates are arranged between the adjacent first flow guide plates in the horizontal direction, and the first flow guide plates and the second flow guide plates jointly form a serpentine channel; and steam flows from the steam inlet to the steam outlet pipe through the serpentine channel. The device has the effects that the steam separation effect is improved, and aquatic toxins in the steam and the electric conductivity of produced water are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporators, in particular to a horizontal evaporator for preparing water for injection. Background Art

[0002] At present, the preparation of water for injection mainly adopts the hot-pressed distilled water system. During the preparation of distilled water, the evaporator uses the difference in boiling points between water and other impurities to obtain high-purity water.

[0003] In the related art, a Chinese patent with authorization announcement number CN206325242U provides a horizontal falling film evaporator, which includes a heat exchange box, a heat exchange element is arranged in the heat exchange box, an evaporation box is arranged on one side of the heat exchange box, and a condensation box is arranged on the other side of the heat exchange box. The evaporation box and the condensation box are connected through the heat exchange element located in the heat exchange box. A secondary steam outlet is opened at the top of the heat exchange box, a demister is installed between the secondary steam outlet and the heat exchange element, a liquid distribution pipe is installed between the demister and the heat exchange element, and a feed liquid outlet is opened at the bottom of the heat exchange box, and the feed liquid outlet is connected to the liquid distribution pipe. The raw water is heated by the heat exchange element to form steam, and the steam is filtered by the demister and discharged from the secondary steam outlet to separate the steam from other impurities. Subsequently, the steam is cooled and converted into liquid water, and finally pure water is collected.

[0004] In the process of implementing this application, the inventors found that there are at least the following problems in this technology: although a demister is used to reduce the mist entrained in the steam, the demister has a short separation time for the steam, resulting in poor steam separation effect, making it difficult to reduce the water toxins and water conductivity in the steam. Utility Model Content

[0005] In order to improve the separation effect of steam and reduce aquatic toxins and water conductivity in the steam, the present application provides a horizontal evaporator for preparing water for injection.

[0006] The horizontal evaporator for preparing water for injection provided in the present application adopts the following technical solution:

[0007] A horizontal evaporator for preparing water for injection comprises a shell, a water inlet pipe and a water outlet pipe are connectedly arranged on the shell, a heating element is arranged in the shell, a separation box is arranged in the shell, a steam inlet is provided at the bottom of the separation box, a steam outlet pipe is connectedly arranged at the top of the separation box, the steam outlet pipe runs through the shell, a plurality of first guide plates are arranged in the horizontal direction in the separation box, second guide plates are arranged in the horizontal direction between adjacent first guide plates, the first guide plates and the second guide plates jointly form a serpentine channel, and the serpentine channel is used for steam to flow from the steam inlet to the steam outlet pipe.

[0008] By adopting the above technical scheme, raw water enters the shell from the water inlet, and the heating element in the shell heats the raw water to evaporate the raw water to form steam. The unevaporated substances in the raw water are discharged through the water outlet pipe, and the steam enters the separation box through the steam inlet. The steam moves in the serpentine channel formed by the first guide plate and the second guide plate. During the movement of the steam in the serpentine channel, on the one hand, the steam hits the bottom of the first guide plate or the bottom of the second guide plate, so that the impurities in the steam are separated from the steam. On the other hand, the serpentine channel extends the steam flow path, so that during the movement of the steam, the impurities in the steam are separated from the steam under the factor of gravity, thereby improving the separation effect of the steam and reducing the aquatic toxins in the steam and the conductivity of the produced water.

[0009] Preferably, the first guide plate includes a first left plate and a first right plate, the first left plate is fixedly connected to the opposite surfaces of the first right plate, the side walls of the first left plate and the first right plate are both in contact with the inner wall of the separation box, and a plurality of first through holes are provided on the first left plate, and the second guide plate includes a second left plate and a second right plate, the second left plate is fixedly connected to the opposite surfaces of the second right plate, the side walls of the second left plate and the second right plate are both in contact with the inner wall of the separation box, and a plurality of second through holes are provided on the second right plate.

[0010] By adopting the above technical solution, after the steam enters the separation box through the steam inlet, the steam enters between the top of the first guide plate and the bottom of the second guide plate through the first through hole, and the steam is restricted by the first guide plate and the second guide plate, so that the steam moves horizontally between the first guide plate and the second guide plate, and the steam moves from the first through hole to the second through hole, and then the steam enters between the top of the second guide plate and the bottom of the first guide plate through the second through hole, and the steam is restricted by the first guide plate and the second guide plate, so that the steam moves horizontally between the first guide plate and the second guide plate, and the steam moves from the second through hole to the first through hole, so that after the steam passes through the steam inlet, the steam alternately passes through the first through hole and the second through hole, so that the steam flows along the serpentine channel until the steam is discharged from the steam outlet pipe.

[0011] Preferably, the first left side plate and the first right side plate are both inclined, and the height of the first left side plate away from the first right side plate is higher than the height of the first left side plate close to the first right side plate, and the height of the first right side plate away from the first left side plate is higher than the height of the first right side plate close to the first left side plate.

[0012] By adopting the above technical solution, when the steam moves horizontally between the top of the first guide plate and the bottom of the second guide plate, the impurities separated from the steam fall on the first left plate and the first right plate, and the impurities falling on the first left plate and the first right plate flow from high to low, so that the impurities gather at the lowest point between the first left plate and the first right plate, thereby reducing the situation where the impurities block the first through hole and cause the steam circulation to slow down.

[0013] Preferably, the second left side plate and the second right side plate are both inclined, and the height of the second left side plate away from the second right side plate is higher than the height of the second left side plate close to the second right side plate, and the height of the second right side plate away from the second left side plate is higher than the height of the second right side plate close to the second left side plate.

[0014] By adopting the above technical solution, when the steam moves horizontally between the top of the second guide plate and the bottom of the first guide plate, the impurities separated from the steam fall on the second left plate and the second right plate, and the impurities falling on the second left plate and the second right plate flow from high to low, so that the impurities gather at the lowest point between the second left plate and the second right plate, thereby reducing the situation where impurities block the second through hole and cause the steam circulation to slow down.

[0015] Preferably, the first left side plate is arranged in parallel with the second left side plate, the first right side plate is arranged in parallel with the second right side plate, the first through hole is located between the second left side plates, and the second through hole is located between the first right side plates.

[0016] By adopting the above technical solution, the first through holes and the second through holes are arranged alternately, so that a serpentine channel is formed between the first guide plate and the second guide plate.

[0017] Preferably, a plurality of atomizing nozzles are arranged above the heating element, and a circulating water pipe is commonly connected to the atomizing nozzles. The circulating water pipe is connected to the water inlet pipe, one end of the circulating water pipe passes through the shell, and a circulating pump is arranged between one end of the circulating water pipe located outside the shell and the water outlet pipe.

[0018] By adopting the above technical solution, the raw water input into the water inlet pipe enters the circulating water pipe, and the liquid discharged from the water outlet pipe is pumped into the circulating water pipe through the circulating pump. The liquid in the circulating water pipe is evenly sprayed on the heating element through the atomizing nozzle, thereby achieving a uniform water distribution effect, reducing the phenomenon of local drying of the heating element due to uneven water distribution, slowing down the scaling of the tube bundle, and improving the heat transfer efficiency.

[0019] Preferably, the height of the steam inlet is higher than the height of the top of the heating element, and the steam inlet is located on one side of the atomizing nozzle.

[0020] By adopting the above technical solution, since the steam inlet is located at one side of the atomizing nozzle, it is convenient for the steam to enter the separation box through the steam inlet.

[0021] Preferably, a wire mesh separation layer is provided in the steam inlet.

[0022] By adopting the above technical solution, when the steam enters the separation box through the steam inlet, the steam first passes through the wire mesh separation layer, and the wire mesh separation layer separates the large droplets in the steam.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By arranging the shell, the water inlet pipe, the water outlet pipe, the heating element, the separation box, the steam inlet, the steam outlet pipe, the first guide plate, the second guide plate and the serpentine channel, the separation effect of the steam is improved, and the aquatic toxins in the steam and the conductivity of the produced water are reduced;

[0025] 2. By arranging a first left side plate, a first right side plate, a first through hole, a second left side plate, a second right side plate and a second through hole, the steam flows along the serpentine channel until the steam is discharged from the steam outlet pipe;

[0026] 3. By setting up atomizing nozzles, circulating water pipes and circulating pumps, a uniform water distribution effect can be achieved, reducing the phenomenon of local drying of heating elements due to uneven water distribution, slowing down scaling of the tube bundle and improving heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of a horizontal evaporator for preparing water for injection in an embodiment of the present application.

[0028] Figure 2 It is a cross-sectional view of the separation box structure in the embodiment of the present application.

[0029] Figure 3 It is a cross-sectional view of the structure of the first guide plate and the second guide plate in the embodiment of the present application.

[0030] Explanation of the reference numerals: 1. Shell; 11. Water inlet pipe; 12. Water outlet pipe; 2. Heating element; 3. Separation box; 31. Steam inlet; 32. Steam outlet pipe; 4. First guide plate; 41. First left side plate; 411. First through hole; 42. First right side plate; 5. Second guide plate; 51. Second left side plate; 52. Second right side plate; 521. Second through hole; 6. Serpentine channel; 7. Wire mesh separation layer; 8. Atomizing nozzle; 81. Circulating water pipe; 82. Circulating pump. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-3 This application is described in further detail.

[0032] The present application embodiment discloses a horizontal evaporator for preparing water for injection. Figure 1 and Figure 2 , comprising a shell 1, a water inlet pipe 11 is connected to the top of the shell 1, and a water outlet pipe 12 is connected to the bottom of the shell 1. A heating element 2 is installed in the shell 1, and the heating element 2 is a U-shaped heating pipe. A separation box 3 is installed in the shell 1, and the separation box 3 is located at the upper left of the heating element 2. A steam inlet 31 is provided at the bottom of the separation box 3, and a steam outlet pipe 32 is connected to the top of the separation box 3, and the steam outlet pipe 32 runs through the shell 1. A plurality of first guide plates 4 are installed in the separation box 3 along the horizontal direction, and second guide plates 5 are installed between adjacent first guide plates 4 along the horizontal direction. The first guide plates 4 and the second guide plates 5 jointly form a serpentine channel 6, and the serpentine channel 6 connects the steam inlet 31 with the steam outlet pipe 32, so that the steam flows from the steam inlet 31 to the steam outlet pipe 32. Raw water enters the shell 1 from the water inlet, and the heating element 2 in the shell 1 heats the raw water, so that the raw water evaporates to form steam, and the unevaporated substances in the raw water are discharged through the outlet pipe 12. Steam enters the separation box 3 through the steam inlet 31, and moves in the serpentine channel 6 formed by the first guide plate 4 and the second guide plate 5. During the movement of the steam in the serpentine channel 6, on the one hand, the steam hits the bottom of the first guide plate 4 or the bottom of the second guide plate 5, so that the impurities in the steam are separated from the steam. On the other hand, the serpentine channel 6 extends the steam flow path, so that during the movement of the steam, the impurities in the steam are separated from the steam under the factor of gravity. This improves the separation effect of the steam and reduces the aquatic toxins in the steam and the conductivity of the produced water.

[0033] In order to make the steam flow from the steam inlet 31 to the steam outlet pipe 32 along the serpentine channel 6, refer to Figures 1 to 3The first guide plate 4 includes a first left side plate 41 and a first right side plate 42. The first left side plate 41 and the first right side plate 42 are integrally formed on the opposite surfaces. The side walls of the first left side plate 41 and the first right side plate 42 are both in contact with the inner wall of the separation box 3. The first left side plate 41 and the first right side plate 42 are both inclined. The height of the first left side plate 41 away from the first right side plate 42 is higher than the height of the first left side plate 41 close to the first right side plate 42. The height of the first right side plate 42 away from the first left side plate 41 is higher than the height of the first right side plate 42 close to the first left side plate 41. The first left side plate 41 and the first right side plate 42 form a V-shaped structure. The second guide plate 5 includes a second left side plate 51 and a second right side plate 52. The second left side plate 51 and the second right side plate 52 are integrally formed on the opposite surfaces. The side walls of the second left side plate 51 and the second right side plate 52 are both in contact with the inner wall of the separation box 3. The second left side plate 51 and the second right side plate 52 are both inclined, the height of the second left side plate 51 away from the second right side plate 52 is higher than the height of the second left side plate 51 close to the second right side plate 52, the height of the second right side plate 52 away from the second left side plate 51 is higher than the height of the second right side plate 52 close to the second left side plate 51, and the second left side plate 51 and the second right side plate 52 form a V-shaped structure. The first left side plate 41 is parallel to the second left side plate 51, and the first right side plate 42 is parallel to the second right side plate 52. The first left side plate 41 is provided with a plurality of first through holes 411, and the first through holes 411 are located between the second left side plates 51; the second right side plate 52 is provided with a plurality of second through holes 521, and the second through holes 521 are located between the first right side plates 42. Steam enters between the top of the first guide plate 4 and the bottom of the second guide plate 5 through the first through hole 411. The steam is restricted by the first guide plate 4 and the second guide plate 5, so that the steam moves horizontally between the first guide plate 4 and the second guide plate 5, and the steam moves from the first through hole 411 to the second through hole 521. When the steam moves horizontally between the top of the first guide plate 4 and the bottom of the second guide plate 5, the impurities separated from the steam fall on the first left plate 41 and the first right plate 42. The impurities falling on the first left plate 41 and the first right plate 42 flow from high to low, so that the impurities gather at the lowest point between the first left plate 41 and the first right plate 42, thereby reducing the situation where the impurities block the first through hole 411 and cause the steam circulation to slow down. The steam enters between the top of the second guide plate 5 and the bottom of the first guide plate 4 through the second through hole 521. The steam is restricted by the first guide plate 4 and the second guide plate 5, so that the steam moves horizontally between the first guide plate 4 and the second guide plate 5, and the steam moves from the second through hole 521 to the first through hole 411.When the steam moves horizontally between the top of the second guide plate 5 and the bottom of the first guide plate 4, the impurities separated from the steam fall on the second left plate 51 and the second right plate 52. The impurities falling on the second left plate 51 and the second right plate 52 flow from high to low, so that the impurities gather at the lowest point between the second left plate 51 and the second right plate 52, thereby reducing the situation where the impurities block the second through hole 521 and cause the steam circulation to slow down. The first through hole 411 and the second through hole 521 are arranged alternately, so that a serpentine channel 6 is formed between the first guide plate 4 and the second guide plate 5. When the steam enters the separation box 3 from the steam inlet 31, the steam alternately passes through the first through hole 411 and the second through hole 521, so that the steam flows along the serpentine channel 6 until the steam is discharged from the steam outlet pipe 32.

[0034] In order to achieve uniform water distribution, refer to Figure 1 , a plurality of atomizing nozzles 8 are installed above the heating element 2, and a circulating water pipe 81 is connected to the atomizing nozzles 8. The circulating water pipe 81 is connected to the water inlet pipe 11, one end of the circulating water pipe 81 is closed, and the other end of the circulating water pipe 81 passes through the shell 1. A circulating pump 82 is connected between the end of the circulating water pipe 81 located outside the shell 1 and the water outlet pipe 12. The raw water input into the water inlet pipe 11 enters the circulating water pipe 81, and the liquid discharged from the water outlet pipe 12 is pumped into the circulating water pipe 81 through the circulating pump 82. The liquid in the circulating water pipe 81 is evenly sprayed on the heating element 2 through the atomizing nozzles 8. The phenomenon of local drying of the heating element 2 due to uneven water distribution is reduced, the scaling of the tube bundle is slowed down, and the heat transfer efficiency is improved.

[0035] In order to facilitate the steam to enter the separation box 3, refer to Figure 1 The height of the steam inlet 31 is higher than the height of the top of the heating element 2 , and the steam inlet 31 is located on one side of the atomizing nozzle 8 , so that the steam can enter the separation box 3 through the steam inlet 31 .

[0036] In order to improve the steam separation effect, refer to Figure 1 As shown in the figure, a wire mesh separation layer 7 is installed in the steam inlet 31. When the steam enters the separation box 3 through the steam inlet 31, the steam first passes through the wire mesh separation layer 7. The wire mesh separation layer 7 separates the large droplets in the steam. The large droplets directly fall into the shell 1 and are then discharged through the water outlet pipe 11, thereby reducing the situation where the droplets gather on the first guide plate 4 and the second guide plate 5.

[0037] The implementation principle of a horizontal evaporator for preparing water for injection in the embodiment of the present application is as follows: the raw water enters the shell 1 from the water inlet, and the heating element 2 in the shell 1 heats the raw water, so that the raw water evaporates to form steam, and the unevaporated substances in the raw water are discharged through the water outlet pipe 12. After the steam enters the separation box 3 through the steam inlet 31, the steam alternately passes through the first through hole 411 and the second through hole 521, so that the steam flows along the serpentine channel 6 until the steam is discharged from the steam outlet pipe 32. In the process of the steam moving in the serpentine channel 6, on the one hand, the steam hits the bottom of the first guide plate 4 or the bottom of the second guide plate 5, so that the impurities in the steam are separated from the steam, and on the other hand, the serpentine channel 6 extends the steam flow path, so that during the movement of the steam, the impurities in the steam are separated from the steam under the gravity factor. Thereby improving the separation effect of the steam, reducing the water toxins in the steam and the conductivity of the produced water.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A horizontal evaporator for preparing water for injection, comprising a shell (1), a water inlet pipe (11) and a water outlet pipe (12) being arranged on the shell (1), a heating element (2) being arranged inside the shell (1), characterized in that: A separation box (3) is arranged in the shell (1), a steam inlet (31) is provided at the bottom of the separation box (3), a steam outlet pipe (32) is arranged at the top of the separation box (3), and the steam outlet pipe (32) passes through the shell (1). A plurality of first guide plates (4) are arranged in the horizontal direction in the separation box (3), and second guide plates (5) are arranged in the horizontal direction between adjacent first guide plates (4). The first guide plates (4) and the second guide plates (5) together form a serpentine channel (6), and the serpentine channel (6) allows steam to flow from the steam inlet (31) to the steam outlet pipe (32).

2. A horizontal evaporator for preparing water for injection according to claim 1, characterized in that: The first guide plate (4) comprises a first left side plate (41) and a first right side plate (42); the first left side plate (41) and the first right side plate (42) are fixedly connected at opposite surfaces; the side wall of the first left side plate (41) and the side wall of the first right side plate (42) are both in contact with the inner wall of the separation box (3); the first left side plate (41) is provided with a plurality of first through holes (411); the second guide plate (5) comprises a second left side plate (51) and a second right side plate (52); the second left side plate (51) and the second right side plate (52) are fixedly connected at opposite surfaces; the side wall of the second left side plate (51) and the side wall of the second right side plate (52) are both in contact with the inner wall of the separation box (3); the second right side plate (52) is provided with a plurality of second through holes (521).

3. A horizontal evaporator for preparing water for injection according to claim 2, characterized in that: The first left side plate (41) and the first right side plate (42) are both arranged obliquely, the height of the first left side plate (41) away from the first right side plate (42) is higher than the height of the first left side plate (41) near the first right side plate (42), and the height of the first right side plate (42) away from the first left side plate (41) is higher than the height of the first right side plate (42) near the first left side plate (41).

4. A horizontal evaporator for preparing water for injection according to claim 2, characterized in that: The second left side plate (51) and the second right side plate (52) are both arranged obliquely, the height of the second left side plate (51) away from the second right side plate (52) is higher than the height of the second left side plate (51) close to the second right side plate (52), and the height of the second right side plate (52) away from the second left side plate (51) is higher than the height of the second right side plate (52) close to the second left side plate (51).

5. A horizontal evaporator for preparing water for injection according to claim 2, characterized in that: The first left side plate (41) is arranged in parallel with the second left side plate (51), the first right side plate (42) is arranged in parallel with the second right side plate (52), the first through hole (411) is located between the second left side plates (51), and the second through hole (521) is located between the first right side plates (42).

6. A horizontal evaporator for preparing water for injection according to claim 1, characterized in that: A plurality of atomizing nozzles (8) are arranged above the heating element (2); a circulating water pipe (81) is arranged on the atomizing nozzles (8) and is in communication with each other; the circulating water pipe (81) and the water inlet pipe (11) are in communication with each other; one end of the circulating water pipe (81) passes through the shell (1); and a circulating pump (82) is arranged between one end of the circulating water pipe (81) located outside the shell (1) and in communication with the water outlet pipe (12).

7. A horizontal evaporator for preparing water for injection according to claim 6, characterized in that: The height of the steam inlet (31) is higher than the height of the top of the heating element (2), and the steam inlet (31) is located on one side of the atomizing nozzle (8).

8. The horizontal evaporator for preparing water for injection according to claim 1, characterized in that: A wire mesh separation layer (7) is arranged inside the steam inlet (31).

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