External heating type reverse circulation evaporating crystallizer

Abstract

The utility model relates to the technical field of evaporation crystallizers, in particular to an external heating type reverse circulation evaporation crystallizer which comprises a heating chamber, an evaporation chamber, a confluence chamber and a feeding port, the heating chamber comprises a base, a pump machine, a heating pipe and a sealing cover, and the top of the heating chamber is connected with the evaporation chamber through a connecting pipe. The bottom of the evaporation chamber is connected with the top of the confluence chamber through a pipeline, the feeding port is formed in one end of the confluence chamber, the other end of the confluence chamber is connected with the bottom of the heating chamber through a pipeline, the base is arranged at the bottom of the heating chamber, the pump machine is installed at one end of the base, the heating pipes are vertically arranged in the heating chamber in an array mode, and the sealing cover is installed at the top of the heating chamber. According to the utility model, the pump machine is used for controlling the speed of liquid reverse circulation, so that the device is suitable for raw material liquid with different volatilization speeds, the one-way valve is used for ensuring that raw materials can be added in the crystallization process, leakage is avoided, and crystals in circulation are intercepted and accumulated by using the filter screen and the separation net, so that the recycling is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporation crystallizers, in particular to an external heating type reverse circulation evaporation crystallizer. Background Art

[0002] Evaporator crystallizers can be divided into two types: natural circulation and forced circulation, depending on the different principles of liquid circulation. The external heating evaporator is separated from the separation chamber by a heating chamber, which reduces the structure of the evaporator and makes it easier to install and maintain, but it is not suitable for handling a large amount of crystallized liquid. Forced circulation is also called reverse circulation. This type of evaporator is easy to handle raw liquids with high viscosity, easy scaling, and a large amount of precipitated crystals, but due to its complex structure, it cannot be installed and maintained. Therefore, an external heating reverse circulation evaporator crystallizer that is easy to install and disassemble is needed.

[0003] Chinese patent CN218686484U discloses an externally heated reverse cycle radial discharge evaporation crystallizer, wherein a support mechanism is installed on one side of the top of the base, and a crystallizer body is installed inside the support mechanism; an externally heated heat dissipation component is installed on the top of the base, and the top of the externally heated component is sleeved on the outside of the crystallizer body; a fixing plate is installed on the other side of the top of the base, and a positioning component is installed on the side of the fixing plate close to the crystallizer body; this scheme facilitates the installation and disassembly of the crystallizer body through the setting of the support mechanism, and through the coordinated use of the screw rod and the nut, one end of the crystallizer body can be connected and fixed to the fixing plate, thereby improving stability, and at the same time, the positioning rod is inserted into the positioning hole, which can facilitate the positioning of the crystallizer body during installation, thereby improving the convenience during installation.

[0004] There are still several points for improvement in the above scheme: small particle crystals will flow in the device with the circulating liquid, making them inconvenient to collect; the evaporation rate is fixed and the crystallization speed cannot be changed, so it can only be applied to the crystallization of a single type of raw material. Utility Model Content

[0005] In order to solve the problems of the prior art, the utility model provides an externally heated reverse cycle evaporation crystallizer, comprising a heating chamber, an evaporation chamber, a confluence chamber and a feed inlet, the heating chamber comprising a base, a pump, a heating tube and a cover, the top of the heating chamber is connected to the evaporation chamber through a connecting pipe, the bottom of the evaporation chamber is connected to the top of the confluence chamber through a pipeline, the feed inlet is arranged at one end of the confluence chamber, the other end of the confluence chamber is connected to the bottom of the heating chamber through a pipeline, the base is arranged at the bottom of the heating chamber, the pump is installed at one end of the base, the vertical array of heating tubes is arranged inside the heating chamber, and the cover is installed on the top of the heating chamber.

[0006] Preferably, the heating tube includes an end plate, a ring frame, an air inlet and an exhaust port, the end plates are arranged at both ends of the heating tube, the ring frame is arranged on the inner wall of the heating chamber and contacts with the end plate at the bottom of the heating tube, the air inlet is arranged on the outer wall of the upper half of the heating chamber, and the exhaust port is arranged on the outer wall of the lower half of the heating chamber.

[0007] Preferably, the cover includes a connecting tube, a first boss and an isolation net, one end of the connecting tube is connected to the top of the cover, and the other end is connected to the evaporation chamber, the first boss is installed above the cover and in the connecting tube, and the isolation net is installed on the first boss.

[0008] Preferably, the evaporation chamber includes a top cover, an inclined tube and a straight tube, the top cover is installed on the top of the evaporation chamber, the straight tube is arranged at the inner center of the evaporation chamber and passes through the bottom of the evaporation chamber, and the inclined tube passes through the side wall of the evaporation chamber and is connected to the straight tube.

[0009] Preferably, the top cover comprises an air outlet, a second boss and a filter, the air outlet is arranged at the center of the top cover, the second boss is arranged on the lower surface of the top cover and below the air outlet, and the filter is mounted on the second boss.

[0010] Preferably, the straight tube includes a column, a baffle and a reflux groove, the column array is arranged on the top of the straight tube, the baffle is installed on the column, and the reflux groove is arranged on the side wall of the straight tube.

[0011] Preferably, the confluence chamber includes a reflux pipe, a feed pipe and a one-way valve, one end of the reflux pipe is connected to the bottom of the evaporation chamber, and the other end is connected to the top of the confluence chamber, the feed pipe is installed on the side of the confluence chamber and opposite to the position of the feed inlet, and the feed pipe connects the confluence chamber and the base.

[0012] Preferably, the one-way valve comprises a top ball, a spring and a positioning platform, the top ball is mounted on the one-way valve, the spring is arranged at the bottom of the top ball and connected to the positioning platform, and the positioning platform is mounted on the inner wall of the feed inlet.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. The utility model uses a pump to control the rate of reverse circulation of the liquid, and can be applicable to raw material liquids with different volatilization rates. Specifically, the pump sends the raw material liquid into the heating chamber from bottom to top, and controls the heating time of the raw material liquid in the heating chamber by controlling the rotation speed of the pump, so that the device can be applicable to various types of raw material liquids, thereby improving versatility.

[0015] 2. The utility model uses a one-way valve to ensure that raw materials can be added during the crystallization process to avoid leakage. Specifically, the feed pipe allows the raw material liquid to enter the base to receive the pressurization of the pump, and the one-way valve is used to prevent the liquid falling in the reflux pipe from rushing back out of the feed port due to the gravity potential energy.

[0016] 3. The utility model uses a filter screen and an isolation net to intercept and accumulate the crystals in circulation for easy recovery. Specifically, the isolation net is used to block solid crystals so that some of the crystals refluxed from the evaporation chamber are accumulated above the heating chamber. The filter screen is used to block some of the solid crystals to prevent them from rushing out of the top cover along with the pressurized liquid of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of an externally heated reverse cycle evaporation crystallizer.

[0018] Figure 2 The present invention is a cross-sectional view of a heating chamber in an externally heated reverse cycle evaporation crystallizer.

[0019] Figure 3 The present invention is a cross-sectional view of an evaporation chamber in an externally heated reverse cycle evaporation crystallizer.

[0020] Figure 4 It is a three-dimensional diagram of the top cover of an externally heated reverse cycle evaporation crystallizer.

[0021] Figure 5 It is a three-dimensional diagram of the isolation net in an externally heated reverse cycle evaporation crystallizer.

[0022] Figure 6 It is a three-dimensional diagram of a one-way valve in an externally heated reverse cycle evaporation crystallizer.

[0023] The numbers in the figure are: 1. heating chamber; 2. base; 3. pump; 4. heating tube; 41. end plate; 42. ring frame; 43. air inlet; 44. exhaust port; 5. cover; 51. connecting pipe; 52. first boss; 53. isolation net; 6. evaporation chamber; 61. top cover; 611. air outlet; 612. second boss; 613. filter; 62. inclined tube; 63. straight tube; 631. column; 632. baffle; 633. reflux groove; 7. confluence chamber; 71. reflux pipe; 72. feed pipe; 73. one-way valve; 731. top ball; 732. spring; 733. positioning table; 8. feed port. DETAILED DESCRIPTION

[0024] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] See also Figure 1 to Figure 6As shown, an external heating reverse cycle evaporation crystallizer includes a heating chamber 1, an evaporation chamber 6, a confluence chamber 7 and a feed inlet 8. The heating chamber 1 includes a base 2, a pump 3, a heating tube 4 and a cover 5. The top of the heating chamber 1 is connected to the evaporation chamber 6 through a connecting pipe 51, the bottom of the evaporation chamber 6 is connected to the top of the confluence chamber 7 through a pipeline, the feed inlet 8 is arranged at one end of the confluence chamber 7, and the other end of the confluence chamber 7 is connected to the bottom of the heating chamber 1 through a pipeline. The base 2 is arranged at the bottom of the heating chamber 1, the pump 3 is installed at one end of the base 2, the heating tube 4 is vertically arrayed inside the heating chamber 1, and the cover 5 is installed on the top of the heating chamber 1.

[0026] The raw material liquid input from the device from the feed port 8 enters the base 2 after passing through the confluence chamber 7 and is sent to the heating chamber 1 from bottom to top through the pump 3. The raw material liquid enters the top of the heating chamber 1 from the heating tube 4 and passes through the cover 5 under the push of the hydraulic pressure to reverse into the evaporation chamber 6. The high-temperature liquid evaporates in the evaporation chamber 6 and forms crystals and accumulates in the evaporation chamber 6. The unconsumed raw material liquid falls from the evaporation chamber 6 into the confluence chamber 7 and is reversely circulated until the raw material liquid is consumed. The base 2 is connected to the heating chamber 1 by threads and the cover 5 is also connected to the heating chamber 1 by threads, so that the heating chamber 1 can be quickly removed from the base 2 and cleaned, ensuring the heating efficiency to improve the volatilization speed.

[0027] See also Figure 1-2 As shown, the heating tube 4 includes an end plate 41, a ring frame 42, an air inlet 43 and an exhaust port 44. The end plate 41 is arranged at both ends of the heating tube 4, the ring frame 42 is arranged on the inner wall of the heating chamber 1 and contacts the end plate 41 at the bottom of the heating tube 4, the air inlet 43 is arranged on the outer wall of the upper half of the heating chamber 1, and the exhaust port 44 is arranged on the outer wall of the lower half of the heating chamber 1.

[0028] The end plate 41 is used to form a closed space between the upper and lower ends of the heating tube 4. The contact between the ring frame 42 and the lower end plate 41 allows the heating tube 4 to be suspended inside the heating chamber 1. High-temperature steam is input through the air inlet 43 to heat the raw material liquid passing through the heating tube 4, and the high-temperature gas is discharged through the exhaust port 44 to balance the air pressure. The high-temperature gas will produce condensed water after heat exchange, so the air inlet 43 is at the top and the exhaust port 44 is at the bottom.

[0029] See also Figure 2 to Figure 5 As shown, the cover 5 includes a connecting tube 51, a first boss 52 and an isolation net 53. One end of the connecting tube 51 is connected to the top of the cover 5, and the other end is connected to the evaporation chamber 6. The first boss 52 is installed above the cover 5 and is in the connecting tube 51, and the isolation net 53 is installed on the first boss 52.

[0030] The connecting pipe 51 is connected to the evaporation chamber 6 through a flange to facilitate quick installation and removal of the cover 5. The first boss 52 is used to install an isolation net 53. The isolation net 53 serves to block solid crystallization so that some of the crystals refluxed from the evaporation chamber 6 accumulate above the heating chamber 1. The solid crystals can be quickly dumped and collected by opening the cover 5.

[0031] See also Figure 1 to Figure 3 As shown, the evaporation chamber 6 includes a top cover 61, an inclined tube 62 and a straight tube 63. The top cover 61 is installed on the top of the evaporation chamber 6. The straight tube 63 is arranged at the inner center of the evaporation chamber 6 and passes through the bottom of the evaporation chamber 6. The inclined tube 62 passes through the side wall of the evaporation chamber 6 and is connected to the straight tube 63.

[0032] The inclined tube 62 is used to connect the heating chamber 1, so that the high-temperature raw material liquid enters the interior of the evaporation chamber 6 for volatilization and crystallization. The straight tube 63 is used to reflux the unconsumed raw material liquid. At the same time, the straight tube 63 forms an angle with the bottom of the evaporation chamber 6 to facilitate the sedimentation of solid crystals. The top cover 61 can be quickly opened and closed to extract the solid crystals.

[0033] See also Figure 3-4 As shown, the top cover 61 includes an air outlet 611 , a second boss 612 and a filter 613 . The air outlet 611 is arranged at the center of the top cover 61 , the second boss 612 is arranged on the lower surface of the top cover 61 and below the air outlet 611 , and the filter 613 is installed on the second boss 612 .

[0034] The gas outlet 611 is used to discharge the volatilized gas in the evaporation chamber 6 to ensure the internal air pressure balance. The second boss 612 is used to install the filter 613, and the filter 613 is used to block part of the solid crystals to prevent them from rushing out of the top cover 61 along with the pressurized liquid of the pump 3.

[0035] See also Figure 3 As shown, the straight pipe 63 includes a column 631 , a baffle 632 and a reflux groove 633 . The column 631 is arranged in an array on the top of the straight pipe 63 , the baffle 632 is installed on the column 631 , and the reflux groove 633 is arranged on the side wall of the straight pipe 63 .

[0036] Since the raw material liquid transmitted in the heating chamber 1 has extremely high hydraulic pressure, a baffle 632 is used to prevent a large amount of liquid from impacting the top of the evaporation chamber 6. The column 631 is used to install the baffle 632 and form a gap to allow the high-temperature liquid to accumulate at the bottom of the evaporation chamber 6. The reflux groove 633 is used to control the unit raw material liquid accumulated in the evaporation chamber 6. When there is too much raw material liquid, the reflux groove 633 enters the straight pipe 63 at the same time, and finally enters the confluence chamber 7 for reverse circulation evaporation and crystallization.

[0037] See also Figure 1 to Figure 6As shown, the confluence chamber 7 includes a reflux pipe 71, a feed pipe 72 and a one-way valve 73. One end of the reflux pipe 71 is connected to the bottom of the evaporation chamber 6, and the other end is connected to the top of the confluence chamber 7. The feed pipe 72 is installed on the side of the confluence chamber 7 and is opposite to the position of the feed port 8. At the same time, the feed pipe 72 connects the confluence chamber 7 and the base 2.

[0038] The reflux pipe 71 is used to receive unconsumed raw material liquid, the feed pipe 72 allows the raw material liquid to enter the base 2 to be pressurized by the pump 3, and the one-way valve 73 is used to prevent the liquid falling in the reflux pipe 71 from rushing back out of the feed port 8 due to gravity potential energy.

[0039] See also Figure 6 As shown, the one-way valve 73 includes a top ball 731, a spring 732 and a positioning platform 733. The top ball 731 is installed on the one-way valve 73. The spring 732 is arranged at the bottom of the top ball 731 and connected to the positioning platform 733. The positioning platform 733 is installed on the inner wall of the feed port 8.

[0040] The movement of the top ball 731 on the one-way valve 73 controls the opening and closing of the one-way valve 73. The positioning platform 733 is used to install the one-way valve 73. The spring 732 provides a certain resetting ability for the one-way valve 73. When raw materials are added, the pressure of the feed inlet 8 is greater than the pressure in the reflux pipe 71, the top ball 731 is pushed open, and the spring 732 is stretched. When the addition of raw materials stops, the pressure of the reflux pipe 71 is greater than the pressure of the feed inlet 8, the spring 732 pulls the top ball 731 to reset, and the top ball 731 seals the one-way valve 73.

[0041] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. An externally heated reverse cycle evaporation crystallizer, comprising a heating chamber (1), an evaporation chamber (6), a confluence chamber (7) and a feed inlet (8); It is characterized in that The heating chamber (1) comprises a base (2), a pump (3), a heating tube (4) and a cover (5); the top of the heating chamber (1) is connected to the evaporation chamber (6) via a connecting tube (51); the bottom of the evaporation chamber (6) is connected to the top of the confluence chamber (7) via a pipeline; an inlet (8) is arranged at one end of the confluence chamber (7); the other end of the confluence chamber (7) is connected to the bottom of the heating chamber (1) via a pipeline; the base (2) is arranged at the bottom of the heating chamber (1); the pump (3) is installed at one end of the base (2); the heating tube (4) is arranged in a vertical array inside the heating chamber (1); and the cover (5) is installed at the top of the heating chamber (1).

2. The externally heated reverse cycle evaporation crystallizer according to claim 1, characterized in that: The heating tube (4) comprises an end plate (41), a ring frame (42), an air inlet (43) and an air outlet (44); the end plates (41) are arranged at both ends of the heating tube (4); the ring frame (42) is arranged on the inner wall of the heating chamber (1) and is in contact with the end plate (41) at the bottom of the heating tube (4); the air inlet (43) is arranged on the outer wall of the upper half of the heating chamber (1); and the air outlet (44) is arranged on the outer wall of the lower half of the heating chamber (1).

3. The external heating reverse cycle evaporation crystallizer according to claim 1, characterized in that: The sealing cover (5) comprises a connecting tube (51), a first boss (52) and an isolation net (53); one end of the connecting tube (51) is connected to the top of the sealing cover (5), and the other end is connected to the evaporation chamber (6); the first boss (52) is installed above the sealing cover (5) and in the connecting tube (51); and the isolation net (53) is installed on the first boss (52).

4. The externally heated reverse cycle evaporation crystallizer according to claim 1, characterized in that: The evaporation chamber (6) comprises a top cover (61), an inclined tube (62) and a straight tube (63); the top cover (61) is installed on the top of the evaporation chamber (6); the straight tube (63) is arranged at the inner center of the evaporation chamber (6) and passes through the bottom of the evaporation chamber (6); and the inclined tube (62) passes through the side wall of the evaporation chamber (6) and is connected to the straight tube (63).

5. The externally heated reverse cycle evaporation crystallizer according to claim 4, characterized in that: The top cover (61) comprises an air outlet (611), a second boss (612) and a filter (613); the air outlet (611) is arranged at the center of the top cover (61); the second boss (612) is arranged on the lower surface of the top cover (61) and below the air outlet (611); and the filter (613) is installed on the second boss (612).

6. The externally heated reverse cycle evaporation crystallizer according to claim 4, characterized in that: The straight pipe (63) comprises a column (631), a baffle (632) and a reflux groove (633). The column (631) array is arranged on the top of the straight pipe (63), the baffle (632) is installed on the column (631), and the reflux groove (633) is arranged on the side wall of the straight pipe (63).

7. The externally heated reverse cycle evaporation crystallizer according to claim 1, characterized in that: The confluence chamber (7) comprises a reflux pipe (71), a feed pipe (72) and a one-way valve (73); one end of the reflux pipe (71) is connected to the bottom of the evaporation chamber (6), and the other end is connected to the top of the confluence chamber (7); the feed pipe (72) is installed on the side of the confluence chamber (7) and is opposite to the position of the feed port (8); and the feed pipe (72) is connected to the confluence chamber (7) and the base (2).

8. The externally heated reverse cycle evaporation crystallizer according to claim 7, characterized in that: The one-way valve (73) comprises a top ball (731), a spring (732) and a positioning platform (733). The top ball (731) is mounted on the one-way valve (73), the spring (732) is arranged at the bottom of the top ball (731) and connected to the positioning platform (733), and the positioning platform (733) is mounted on the inner wall of the feed port (8).

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