Integrated evaporation separator

Abstract

The utility model discloses an integrated evaporation separator. A defoaming section and a secondary steam outlet are arranged at the upper end of a mother liquor evaporation section; a conical barrel is arranged at the lower part of the mother liquor evaporation section, a feeding flow guide pipe is arranged in an inner cavity at the middle lower part of the mother liquor evaporation section, and a lower port of the conical barrel is connected with a material accumulation section and is provided with a concentrated material outlet; a bypass opening is formed in the side wall of the middle section of the material accumulation section and is connected with a separator heat exchange section; an inner port of the heat exchange section shell is connected with a bypass port flange through an inner end tube plate flange, an outer port of the heat exchange section shell is provided with an outer end tube plate flange, the inner end tube plate flange is connected with the outer end tube plate flange through a plurality of heat transfer tubes, and the outer side of the outer end tube plate flange is connected with a tube box; a detachable tube pass partition plate is arranged on the cross section of the middle section of the material accumulation section, and the root of the detachable tube pass partition plate is connected with the middle diameter line of the inner end tube plate flange to divide the heat transfer tubes into an upper group and a lower group. The equipment is provided with a heating section to heat feed liquid, so that the evaporation efficiency is improved, and the equipment height and investment are reduced.

Description

Technical Field

[0001] The utility model relates to an evaporation separator, in particular to an integrated evaporation separator, and belongs to the technical field of evaporation and concentration equipment. Background Art

[0002] The separator is a device used in conjunction with a crystallization chamber and a forced circulation heater. The flash evaporation of the material in it can meet the forced circulation conditions. Because the system has a large forced circulation volume, in order to achieve rapid and thorough gas-liquid separation and flash crystallization of the material in the crystallization chamber, the diameter of the evaporation separation chamber needs to be enlarged accordingly.

[0003] A Chinese utility model patent, published with publication number CN 219355265 U, discloses an MVR separator, comprising a barrel, upper and lower heads, temperature sensor ports, sight glasses, and flushing connections. The upper and lower heads are located at the top and bottom ends of the barrel. Material is introduced through a side-inlet and bottom-outlet design, with secondary steam discharged from the side of the upper head. Multiple sight glasses are located along the sides of the separator barrel to monitor the evaporation process within the separator. Flushing connections are also available for flushing the separator interior.

[0004] However, the above evaporator scheme and the prior art have the following defects: 1. The material inlet enters directly, the feed liquid is not effectively dispersed, and the evaporation effect of the feed liquid is limited;

[0005] 2. The separator cylinder has a high aspect ratio, resulting in insufficient effective evaporation area when the material evaporates. The separator volume is redundant and the overall height of the equipment is high.

[0006] 3. The separator needs to be equipped with an additional heater to complete MVR evaporation and concentration, which does not realize the integrated design and has high investment cost of the device;

[0007] 4. For the evaporation and concentration of materials with different concentrations, the separator has no effective measures to change the system heat exchange area and material flow rate, making it difficult to achieve long-term stable concentration of different material concentrations. Utility Model Content

[0008] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and utility model title of this application, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0009] In view of the above problems and / or the problems existing in the prior art, the present utility model is proposed.

[0010] The purpose of the utility model is to overcome the problems existing in the prior art and provide an integrated evaporation separator with a built-in heating section, which can heat the feed liquid together with an external heater or independently, thereby improving the evaporation efficiency and reducing the equipment height and equipment investment.

[0011] In order to solve the above technical problems, the utility model provides an integrated evaporation separator, comprising a mother liquid evaporation section located in the middle, a defoaming section that tapers upward at the upper end of the mother liquid evaporation section, and a secondary steam outlet at the top center of the defoaming section; a tapered cylinder that gradually narrows downward is provided at the lower part of the cylinder of the mother liquid evaporation section, a feed guide pipe is provided in the middle and lower inner cavity of the mother liquid evaporation section, the lower end of the feed guide pipe extends from the tapered wall of the tapered cylinder and is provided with a material inlet, the upper end of the feed guide pipe extends toward the axis of the mother liquid evaporation section, and the upper end is provided with a feed bell mouth;

[0012] The lower end of the conical cylinder is connected to a material accumulation section extending downward, and a concentrated material outlet is provided at the lower end of the material accumulation section; a bypass port is provided on the side wall of the middle section of the material accumulation section, and a separator heat exchange section extending laterally outward is connected to the bypass port flange;

[0013] The separator heat exchange section includes a heat exchange section shell, the inner port of the heat exchange section shell is connected to the bypass port flange through the inner tube sheet flange, the outer port of the heat exchange section shell is provided with an outer tube sheet flange, the inner tube sheet flange and the outer tube sheet flange are connected by multiple heat transfer tubes, and the outer side of the outer tube sheet flange is connected to a pipe box;

[0014] A removable tube-side partition is provided on the middle cross section of the material accumulation section. The root of the removable tube-side partition is connected to the middle diameter line of the inner end tube sheet flange to separate the heat transfer tubes into two groups, upper and lower.

[0015] As an improvement of the present invention, a partition reinforcing ring is provided on the circumference of the middle section of the material accumulation section, and the end of the detachable pipe-side partition is embedded in the groove of the partition reinforcing ring.

[0016] As a further improvement of the present invention, a heating steam inlet is provided at the distal top of the heat exchange section shell, the heating steam inlet is connected to the compression steam pipe, and a condensate outlet is provided at the proximal bottom of the heat exchange section shell.

[0017] As a further improvement of the present invention, the middle section of the heat exchange section shell is provided with an outwardly protruding heat exchanger corrugated section.

[0018] As a further improvement of the present invention, the inner cavity cross section of the defoaming section is provided with a wire mesh defoamer, an annular flushing pipe is provided above the wire mesh defoamer, and a flushing water pipe port is provided on the side wall of the defoaming section to communicate with the annular flushing pipe.

[0019] As a further improvement of the present invention, a plurality of baffles are provided along the length direction of the heat transfer tube.

[0020] As a further improvement of the present invention, the bottoms of both ends of the heat exchange section shell are respectively connected to heat exchange section brackets, rollers are respectively provided below the heat exchange section brackets, and the bottoms of the rollers are supported on the mounting base.

[0021] Compared with the existing technology, the utility model has achieved the following beneficial effects: 1. The horizontal shell and tube evaporator is effectively combined with the concentration separator, which not only reduces the equipment height of the concentration device and effectively reduces the investment cost of the steel structure of the device; at the same time, the integrated separator design can reduce the length of the material circulation pipe and the heat loss of the material circulation, reduce the pipeline investment cost, and also increase the evaporation temperature of the separator.

[0022] 2. An annular flushing pipe and a wire mesh demister are installed at the top of the cone. The wire mesh demister absorbs droplets and dust in the secondary steam, and the separator and wire mesh demister are regularly flushed with hot water in the annular flushing pipe to ensure long-term and stable operation of the concentration device.

[0023] 3. The mother liquor evaporation section effectively increases the surface area of ​​the concentrated mother liquor during evaporation by increasing the cross-sectional area of ​​the mother liquor evaporation section and the feed bell mouth device, greatly improving the efficiency of the pressure-reducing evaporation.

[0024] 4. A heat exchange section is extended horizontally from the material accumulation section at the bottom of the integrated evaporator separator. The material is introduced into the heat exchange section through a detachable tube-side partition to exchange heat with the shell steam, saving equipment manufacturing costs.

[0025] 5. A detachable device for the separator heat exchange section is designed. Taking into account the changes in the inlet liquid concentration, the integrated evaporator separator heat exchange section can be quickly disassembled through the rollers at the bottom of the heat exchange section through detachable tube baffles, tube sheet flanges, and detachable tube box heads. The entire system is changed from a dual-heater to a single heater, which can be adjusted according to different feed and discharge concentration requirements, greatly increasing the production flexibility of the device and reducing operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. The drawings are only provided for reference and explanation, and are not intended to limit the present invention. Among them:

[0027] Figure 1 This is a three-dimensional diagram of the integrated evaporation separator of the utility model;

[0028] Figure 2 This is a cross-sectional view of the integrated evaporation separator of the utility model;

[0029] Figure 3 This is a three-dimensional diagram of the integrated evaporation separator of the utility model after separation.

[0030] In the figure: 1a1. Secondary steam outlet; 1a2. Manhole; 1a3. Defoaming section; 1a4. Mother liquor evaporation section; 1a5. Flushing water pipe outlet; 1a6. Ear seat; 1a7. Removable tube baffle; 1a8. Baffle reinforcement ring; 1a9. Concentrated material outlet; 1a10. Wire mesh demister; 1a11. Annular flushing pipe; 1a12. Material inlet; 1a13. Feed bell mouth; 1a14. Material accumulation section.

[0031] 1b1. Inner tube sheet flange; 1b2. Heat exchange section shell; 1b3. Heat transfer tube; 1b4. Upper baffle; 1b5. Lower baffle; 1b6 Heat exchanger bellows; 1b7. Heating steam inlet; 1b8. Outer tube sheet flange; 1b9. Removable tube box head; 1b10. Mounting base; 1b11. Tube box; 1b12. Roller; 1b13. Heat exchange section bracket; 1b14. Condensate outlet. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific figures. Obviously, the embodiments described are only a part of the present invention, not all of the embodiments.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] like Figures 1 to 3 As shown, the middle portion of the integrated evaporation separator of the present invention is a mother liquor evaporation section 1a4. The upper end of the mother liquor evaporation section 1a4 is provided with a defoaming section 1a3 that tapers upward. A secondary steam outlet 1a1 is provided at the top center of the defoaming section 1a3. A manhole 1a2 is provided on the side wall of the defoaming section 1a3. A wire mesh demister 1a10 is provided in the inner cross section of the defoaming section 1a3. An annular flushing pipe 1a11 is provided above the wire mesh demister 1a10. A flushing water pipe port 1a5 is provided on the side wall of the defoaming section 1a3 and communicates with the annular flushing pipe 1a11.

[0035] The lower portion of the mother liquid evaporation section 1a4 features a tapered, tapered barrel that tapers downward. A feed guide tube is located within the lower, middle portion of the barrel. The lower end of the feed guide tube extends from the tapered barrel wall and features a material inlet 1a12. The upper end of the feed guide tube extends toward the axis of the mother liquid evaporation section 1a4 and is equipped with a feed bell mouth 1a13. Lugs 1a6 are located on either side of the barrel's midsection to facilitate lifting and transportation.

[0036] The lower end of the conical cylinder is connected to a downwardly extending material accumulation section 1a14, the lower end of which is provided with a concentrated material outlet 1a9. A bypass port is provided on the sidewall of the middle section of the material accumulation section 1a14, and the bypass port flange is connected to a separator heat exchange section extending laterally outward.

[0037] The separator's heat exchange section includes a heat exchange section housing 1b2. The inner port of this housing 1b2 is connected to the bypass port flange via an inner tube sheet flange 1b1. The outer port of this housing 1b2 is equipped with an outer tube sheet flange 1b8. These flanges are connected by multiple heat transfer tubes 1b3. Multiple baffles are positioned along the length of the heat transfer tubes 1b3. The top of the upper baffle 1b4 is connected to the upper inner wall of the heat exchange section housing 1b2, while the bottom of the lower baffle 1b5 is connected to the lower inner wall of the heat exchange section housing 1b2.

[0038] The distal top of the heat exchange section shell 1b2 is equipped with a heating steam inlet 1b7, the proximal bottom of the heat exchange section shell 1b2 is equipped with a condensate outlet 1b14, and the middle section of the heat exchange section shell 1b2 is equipped with a protruding heat exchanger corrugated section 1b6. The outer side of the outer tube sheet flange 1b8 is connected to the outer side of the pipe box 1b11, and the outer port of the pipe box 1b11 is covered with a removable pipe box head 1b9.

[0039] A removable tube-side partition 1a7 is connected to the middle of the end face of the inner tube sheet flange 1b1 facing the material accumulation section 1a14. The base of this partition 1a7 separates the heat transfer tubes 1b3 into two upper and lower groups along the horizontal diameter line of the inner tube sheet flange 1b1. A partition reinforcement ring 1a8 is provided around the middle of the material accumulation section 1a14. The ends of the removable tube-side partition 1a7 fit into the grooves of this ring.

[0040] The bottoms of both ends of the heat exchange section shell 1b2 are respectively connected to heat exchange section brackets 1b13, and rollers 1b12 are respectively provided below the heat exchange section brackets 1b13. The bottoms of the rollers 1b12 are supported on the mounting base 1b10.

[0041] The feed liquid enters through the material inlet 1a12, rises along the feed guide pipe and flows to the center of the separator, flows out from the feed bell mouth 1a13, and completes pressure reduction evaporation in the mother liquid evaporation section 1a4 in the middle of the separator to separate the secondary steam and concentrated liquid.

[0042] The secondary vapor separated from the solution flows upward into the defoaming section 1a3 at the top of the separator. The wire mesh demister 1a10 removes any liquid droplets and dust from the vapor before it is discharged through the secondary vapor outlet 1a1. During production, the evaporation process in the separator can be observed through a manhole 1a2, which also allows access for maintenance. If the wire mesh demister 1a10 becomes contaminated with material, hot water is introduced through the flushing water outlet 1a5 into the annular flushing pipe 1a11 above the wire mesh demister 1a10 to flush the separator's inner walls and the wire mesh demister 1a10.

[0043] After evaporation and concentration, the material enters the material accumulation section 1a14 at the bottom of the separator. Blocked by removable tube baffles 1a7, it enters the heat transfer tubes 1b3 in the upper heat exchange section for heating. After being heated in the heat transfer tubes, the material enters the pipe box 1b11 and flows to the heat transfer tubes 1b3 in the lower heat exchange section for secondary heating. After exiting the inner tube sheet flange 1b1, it enters the bottom of the material accumulation section 1a14 and is ultimately discharged through the concentrated material outlet 1a9.

[0044] Heating steam enters the separator's heating section's shell side through heating steam inlet 1b7. It then passes through multiple upper and lower baffles 1b4 and 1b5, where it is deflected and blocked. After sufficient heat exchange with the heat transfer tubes, it becomes condensed water and is discharged through condensate outlet 1b14 into condensate tank 4. To prevent deformation of the separator's heat exchange section due to thermal stress, a heat exchanger corrugated section 1b6 is designed within the heat exchange section shell 1b2 to eliminate thermal stress during the heat exchange process.

[0045] The separator heating section is heated together with the external heater, which can improve the evaporation efficiency, eliminate the need for a second heater on the downward-flowing circulation pipe, and reduce the overall height of the equipment.

[0046] like Figure 3 As shown, considering the continuous operation of the device, if the upstream feed liquid concentration changes and the evaporation capacity decreases, the removable tube-side baffle 1a7, the inner tube sheet flange 1b1, the outer tube sheet flange 1b8 and the removable tube box head 1b9 are removed, and the integrated evaporator separator heat exchange section is quickly disassembled using the roller 1b12 at the bottom of the separator heat exchange section. The entire system is converted from a dual-heater to a single heater, and can be adjusted to meet different feed and discharge concentration requirements, greatly increasing the production flexibility and operating costs of the device.

[0047] The above description is only a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention, but does not limit the scope of patent protection of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. In addition to the above embodiments, the present invention may have other implementation methods without departing from the spirit and scope of the present invention. The present invention may also have various changes and improvements, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention. The scope of protection required by the present invention is defined by the attached claims and their equivalents. Technical features not described in the present invention can be achieved by or using existing technologies, and will not be described here.

Claims

1. An integrated evaporation separator, comprising a mother liquor evaporation section located in the middle, characterized in that: The upper end of the mother liquid evaporation section is provided with a defoaming section that tapers upward, and a secondary steam outlet is provided at the top center of the defoaming section; the lower part of the barrel of the mother liquid evaporation section is provided with a tapered cylinder that gradually narrows downward, and a feed guide pipe is provided in the middle and lower inner cavity of the mother liquid evaporation section. The lower end of the feed guide pipe extends from the conical wall of the tapered cylinder and is provided with a material inlet, and the upper end of the feed guide pipe extends toward the axis of the mother liquid evaporation section and is provided with a feed bell mouth; The lower end of the conical cylinder is connected to a material accumulation section extending downward, and a concentrated material outlet is provided at the lower end of the material accumulation section; a bypass port is provided on the side wall of the middle section of the material accumulation section, and a separator heat exchange section extending laterally outward is connected to the bypass port flange; The separator heat exchange section includes a heat exchange section shell, the inner port of the heat exchange section shell is connected to the bypass port flange through the inner tube sheet flange, the outer port of the heat exchange section shell is provided with an outer tube sheet flange, the inner tube sheet flange and the outer tube sheet flange are connected by multiple heat transfer tubes, and the outer side of the outer tube sheet flange is connected to a pipe box; A removable tube-side partition is provided on the middle cross section of the material accumulation section. The root of the removable tube-side partition is connected to the middle diameter line of the inner end tube sheet flange to separate the heat transfer tubes into two groups, upper and lower.

2. The integrated evaporation separator according to claim 1, characterized in that: A partition reinforcing ring is provided on the circumference of the middle section of the material accumulation section, and the end of the detachable pipe-side partition is embedded in the groove of the partition reinforcing ring.

3. The integrated evaporation separator according to claim 1, characterized in that: A heating steam inlet is provided at the distal top of the heat exchange section shell, and the heating steam inlet is connected to the compression steam pipe. A condensed water outlet is provided at the proximal bottom of the heat exchange section shell.

4. The integrated evaporation separator according to claim 1, characterized in that: The middle section of the heat exchange section shell is provided with an outwardly protruding heat exchanger corrugated section.

5. The integrated evaporation separator according to claim 1, characterized in that: The inner cavity cross section of the defoaming section is provided with a wire mesh defoamer, an annular flushing pipe is provided above the wire mesh defoamer, and a flushing water pipe port is provided on the side wall of the defoaming section and communicates with the annular flushing pipe.

6. The integrated evaporation separator according to claim 1, characterized in that: Multiple baffles are provided along the length of the heat transfer tube.

7. The integrated evaporation separator according to any one of claims 1 to 6, characterized in that: The bottoms of both ends of the heat exchange section shell are respectively connected to heat exchange section brackets, and rollers are respectively provided below the heat exchange section brackets, and the bottoms of the rollers are supported on the mounting base.

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