A flash apparatus

Abstract

The utility model discloses a flash evaporation device, including the flash evaporation jar body, its one side is provided with the feed end, the flash evaporation jar body top is provided with the air valve system that can control the pressure in the jar body, the flash evaporation jar body bottom is provided with the discharge end, the flash evaporation jar body inside is provided with the upper spiral layer and lower spiral layer, the upper spiral layer and lower spiral layer are connected as the integrated structure through double spiral pipe, the feed end is located between the upper spiral layer and lower spiral layer. The utility model has the following beneficial effects: the device is provided with the upper spiral layer and lower spiral layer and the double spiral pipe of external heat source in the flash evaporation jar body inside upper and lower ends to ensure that flash evaporation liquid can continuously absorb heat in the process of being evaporated into steam, avoids that steam generates liquefaction. The structure setting of upper spiral layer and lower spiral layer increases the time of steam rising, guarantees that steam can absorb enough heat in the process of rising.

Description

Technical Field

[0001] This utility model belongs to the field of chemical material processing, and specifically relates to a flash evaporation device. Background Technology

[0002] As a major producer of mirabilite, my country boasts the world's largest reserves. In practical applications, mirabilite is used not only in pharmaceuticals but also in industries such as glassmaking, papermaking, and printing. To increase the concentration of the mirabilite solution for better subsequent crystallization, flash evaporation is commonly used in production for purification.

[0003] Traditional flash evaporation devices often lack a mechanism for heating the internal components, resulting in a failure to provide sufficient heat for the solution to flash into steam. For example, patent application CN220495618U discloses a flash evaporation tank for lubricating oil production. This device incorporates an electric heating plate at the bottom of the tank to continuously heat the interior and provide heat for the solution during flash evaporation, ensuring that the solution absorbs heat and converts into steam during the flash process.

[0004] If the device is large or tall, the electric heating plate at the bottom of the device may not be able to heat the space above the inside of the device properly. This may cause the gas generated during the flash evaporation process to liquefy upon cooling at the top of the device, forming droplets that fall back into the device or adhere to the inner wall of the device, resulting in low flash evaporation efficiency of the device. Utility Model Content

[0005] One object of this invention is to solve at least the aforementioned problems and / or defects, and to provide at least the advantages described below.

[0006] To achieve these objectives and other advantages according to the present invention, a flash evaporation apparatus is provided, comprising:

[0007] It includes a flash tank body with a feed end on one side, a valve system at the top of the flash tank body that can control the pressure inside the tank, and a discharge end at the bottom of the flash tank body.

[0008] The flash tank is provided with an upper spiral layer and a lower spiral layer inside, which respectively divide the flash tank into a spiral upward path and a spiral downward path that are compatible with gas and liquid.

[0009] The upper and lower spiral layers are connected as an integral structure by a double spiral tube. The bottom of the double spiral tube passes through the flash tank and is connected to an external heat source to form a heat source circuit. The feed end is located between the upper and lower spiral layers.

[0010] Preferably, the feed end includes:

[0011] A sealing flange is connected to one side of the flash tank body;

[0012] The L-shaped feed conduit has its vertical end connected to the center of the sealing flange. The horizontal end of the L-shaped feed conduit is provided with a nozzle that can spray out an umbrella-shaped liquid surface. The nozzle is detachably connected to the L-shaped feed conduit.

[0013] Preferably, the air valve system includes an air pressure valve and a discharge pipe, wherein:

[0014] The outlet pipe flange is connected to the top of the flash tank;

[0015] The pressure valve is located at the top of the flash tank and is connected to the outlet pipe.

[0016] Preferably, the top of the flash tank is equipped with a demister that covers the pressure valve.

[0017] Preferably, the upper spiral layer is provided with multiple ventilation holes.

[0018] This utility model has at least the following beneficial effects:

[0019] Compared to existing patented technologies, this device features an upper and lower spiral layer at both ends of the flash tank, along with a double spiral tube connected to an external heat source. This ensures that the flash liquid continuously absorbs heat during the flash evaporation process, preventing liquefaction due to insufficient heat absorption caused by temperature differences between the upper and lower ends of the device. Furthermore, the upper and lower spiral layers increase the time for steam to rise, ensuring sufficient heat absorption during ascent. This design improves the flash evaporation efficiency, resulting in more complete evaporation of the liquid within the flash tank and higher purity of the distilled product.

[0020] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached image description:

[0021] Figure 1 It is a flash evaporation device;

[0022] Figure 2 This is a frontal sectional view of the device;

[0023] Figure 3 This is a cross-sectional view of the device;

[0024] Figure 4 This is a cross-sectional view of the top of the device;

[0025] Figure 5 It is a pneumatic valve system.

[0026] The diagram is marked as follows: 1. Flash tank body; 1-1. Upper spiral layer; 1-11. Spiral ascending passage; 1-12. Vent hole; 1-2. Lower spiral layer; 1-21. Spiral descending passage; 1-3. Double spiral pipe; 11. Demister; 2. Feed end; 21. Sealing flange; 22. L-shaped feed pipe; 221. Nozzle; 3. Air valve system; 31. Air pressure valve; 32. Outlet pipe; 4. Discharge end. Detailed implementation method:

[0027] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0028] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0029] It should be noted that in the description of this utility model, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installed", "equipped with", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] Furthermore, in this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] like Figures 1-5 As shown, a flash evaporation device includes a flash tank 1 with a feed end 2 on one side, a valve system 3 at the top of the flash tank 1 that can control the pressure inside the tank, and a discharge end 4 at the bottom of the flash tank 1.

[0033] The flash tank 1 is provided with an upper spiral layer 1-1 and a lower spiral layer 1-2 inside. The upper spiral layer 1-1 and the lower spiral layer 1-2 divide the flash tank 1 into spiral ascending passage 1-11 and spiral descending passage 1-21 that are compatible with gas and liquid, respectively.

[0034] The upper spiral layer 1-1 and the lower spiral layer 1-2 are connected as an integral structure by a double spiral tube 1-3. The bottom of the double spiral tube 1-3 passes through the flash tank 1 and is connected to an external heat source to form a heat source circuit. The feed end 2 is located between the upper spiral layer 1-1 and the lower spiral layer 1-2.

[0035] Working principle:

[0036] After completing the above operations, the operator can use the above equipment through the feed end 2. When using the above equipment, the operator must first adjust the pressure inside the flash tank 1 through the external recovery system of the gas system so that the gas pressure inside the flash tank 1 is in a low state. Then, the operator can connect an external heat source through the double helix tube 1-3 to introduce the heating solution or high temperature gas into the double helix tube 1-3, thereby preheating the inside of the flash tank 1 in advance and maintaining it at a certain temperature (this temperature is lower than the temperature of the sodium sulfate solution to be flashed).

[0037] When a high-temperature and high-pressure sodium sulfate solution is introduced into the device, the sodium sulfate solution entering the device will begin to boil and evaporate in the low-pressure environment due to the relatively low temperature and pressure inside the device. A portion of the liquid will evaporate rapidly to form steam and spiral upward along the spiral ascending passage 1-11 until it reaches the gas valve system 3. Then, under the action of the gas valve system 3, it will be drawn out to the outside of the flash tank 1.

[0038] Another portion of the liquid will evaporate and form steam as it flows along the spiral descending passage 1-21 under the action of gravity. The steam will spiral upward along the spiral descending passage 1-21 and the spiral ascending passage 1-11 in sequence. During the ascent, the lower spiral layer 1-2 and the upper spiral layer 1-1 will continuously provide heat to the liquid under the heating and conduction effect of the double spiral tube 1-3, so as to ensure that the liquid in the lower spiral layer 1-2 can be continuously converted into steam and continuously provide heat to the converted steam until the steam finally diffuses and rises to the gas valve system 3. In order to ensure the stability of the gas pressure in the device, the gas valve system 3 will draw part of the steam in the flash tank 1 to the outside of the device to ensure that the flash tank 1 is always in a negative pressure state.

[0039] Meanwhile, the solution that eventually flows to the bottom of the device will continue to evaporate and crystallize under high temperature conditions, and the crystals can be discharged through the discharge end 4.

[0040] Throughout the operation of the device, the operator can monitor the changes in pressure and temperature inside the device in real time by setting pressure gauges and thermometers on the flash evaporator, and then adjust the amount and state of the liquid introduced or regulate the gas valve system 3 to ensure that the gas pressure inside the device is always in a negative pressure state.

[0041] In the above technical solution, the feed end 2 includes:

[0042] Sealing flange 21, which is flanged to one side of flash tank body 1;

[0043] The L-shaped feed conduit 22 has its vertical end connected to the center of the sealing flange 21. The horizontal end of the L-shaped feed conduit 22 is provided with a nozzle 221 that can spray out an umbrella-shaped liquid surface. The nozzle 221 is detachably connected to the L-shaped feed conduit 22.

[0044] With the above configuration, the feed end 2 serves as the feed inlet of the flash tank 1. When the high-temperature, high-pressure solution passes through the L-shaped feed conduit 22, and the horizontal end of the L-shaped feed conduit 22 faces upward, the nozzle 221 can spray an umbrella-shaped liquid surface upward, transforming the liquid into a form that is easier to convert into water vapor, thereby increasing the rate at which the liquid evaporates into vapor. At the same time, the upward-sprayed solution can adhere to the bottom of the upper spiral layer 1-1 and then converge and fall downward. In this process, it can be ensured that the solution absorbs heat both upward and downward. The sealing flange 21 is connected to the flash tank 1 via a flange, allowing the operator to remove the sealing flange 21 and take out the connected L-shaped feed conduit 22 to replace the nozzle 221 with a different structure.

[0045] In the above technical solution, the air valve system 3 includes an air pressure valve 31 and an outlet pipe 32, wherein:

[0046] The outlet pipe 32 is flanged and connected to the top of the flash tank 1;

[0047] The pressure valve 31 is located at the top of the flash tank 1 and is connected to the outlet pipe 32.

[0048] With the above configuration, the outlet pipe 32 is used to connect to an external extraction system to reduce the internal pressure. The pressure valve 31 is normally closed. When the internal pressure increases, the pressure valve 31 opens the ventilation duct and increases the size of the gas flow through the ventilation duct to increase the gas release rate. When the internal pressure decreases, the pressure valve 31 reduces the size of the gas flow through the ventilation duct to decrease the gas release rate, thereby regulating the internal pressure of the flash tank 1. Simultaneously, the operator can connect the outlet pipe 32 to an external recovery device to recover and reuse the steam.

[0049] In the above technical solution, a demister 11 covering the pressure valve 31 is provided on the top of the flash tank 1.

[0050] With the above settings, the demister 11 achieves good gas-liquid separation, thereby allowing steam to pass through the pressure valve 31 while air droplets are isolated outside the pressure valve 31, optimizing the flash evaporation efficiency of the device and improving the overall production efficiency of the device.

[0051] In the above technical solution, the upper spiral layer 1-1 is provided with a plurality of ventilation holes 1-12.

[0052] With the above configuration, the multiple vents 1-12 can increase the speed at which the solution flowing out of the nozzle 221 is converted into steam and rises through the upper spiral layer 1-1 to reach the pressure valve 31. Compared to the circular holes in existing patented technologies, the elliptical structure of the vents 1-12 can further increase the rate at which steam evaporates to the valve system 3 and increase the rate at which the pressure valve 31 discharges water vapor.

[0053] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A flash evaporation device, comprising a flash tank body, a feed end provided on one side, a valve system for controlling the pressure inside the tank body provided at the top of the flash tank body, and a discharge end provided at the bottom of the flash tank body, characterized in that: The flash tank is provided with an upper spiral layer and a lower spiral layer inside, which respectively divide the flash tank into a spiral upward path and a spiral downward path that are compatible with gas and liquid. The upper and lower spiral layers are connected as an integral structure by a double spiral tube. The bottom of the double spiral tube passes through the flash tank and is connected to an external heat source to form a heat source circuit. The feed end is located between the upper and lower spiral layers.

2. The flash device of claim 1, wherein The feed end includes: A sealing flange is connected to one side of the flash tank body; The L-shaped feed conduit has its vertical end connected to the center of the sealing flange. The horizontal end of the L-shaped feed conduit is provided with a nozzle that can spray out an umbrella-shaped liquid surface. The nozzle is detachably connected to the L-shaped feed conduit.

3. The flash device of claim 2, wherein, The pneumatic valve system includes a pneumatic valve and a discharge pipe, wherein: The outlet pipe flange is connected to the top of the flash tank; The pressure valve is located at the top of the flash tank and is connected to the outlet pipe.

4. The flash device of claim 3, wherein The top of the flash tank is equipped with a demister that covers the pressure valve.

5. The flash evaporation apparatus according to claim 4, characterized in that, The upper spiral layer is provided with multiple ventilation holes.

Images