Flushing device for slowing down caked salt of vacuum salt production evaporation tank

Abstract

The utility model discloses a flushing device for slowing down caked salt of a vacuum salt production evaporation tank, comprising: a water supply system comprising a water supply coil arranged around the outside of the evaporation tank, and a water supply port of the water supply coil is connected with an external water source through a water supply pipe; the peripheries of the hollow supporting pipes are arranged in the evaporation tank, one end of each hollow supporting pipe is connected with the outer wall of the flared central pipe in the evaporation tank, and the other end of each hollow supporting pipe penetrates out of the evaporation tank and is communicated with the water outlet of the water supply coil pipe. The flushing holes are formed in the upper portion of the hollow supporting pipe, and the multiple flushing holes are evenly distributed in the length direction of the hollow supporting pipe. Compared with the prior art, the water supply system and the hollow supporting pipes are innovatively combined, so that salt crystal accumulation and block salt formation are effectively prevented, the evaporation efficiency and the system stability are remarkably improved, meanwhile, the failure rate and the maintenance cost are reduced, the heat exchange efficiency and the productivity are improved, and remarkable economic benefits are achieved.

Description

Technical Field

[0001] This utility model relates to the field of vacuum salt production technology, specifically to a rinsing device for slowing down salt agglomeration in vacuum salt evaporation tanks. Background Technology

[0002] In the vacuum evaporation salt production industry, the evaporator is the place where brine evaporates and crystallizes, and it is the core equipment of the vacuum salt production system. The speed of brine evaporation directly affects the production capacity of vacuum salt production. Due to violent flashing, a large amount of salt crystals precipitate on the evaporation surface of the evaporator, which easily forms salt clumps near the evaporation surface, causing brine evaporation to be hindered, salt clumps to fall off, and also easily causing blockage of the heating chamber pipes, reducing heat exchange efficiency and affecting the production cycle.

[0003] Existing salt production equipment is shown in the attached figure. Figure 1 As shown, the salt-making equipment mainly includes a heater 16 and an evaporator 1. The heater 16 is connected to the evaporator 1 via an upper circulation pipe 17, and the lower end of the evaporator 1 is connected to the inlet of the heater 16 via a lower circulation pipe 18. Several flared support pipes 15 inside the evaporator 1 support the flared central pipe 5 extending from the upper circulation pipe 17 into the evaporator 1. The specific salt-making process involves the solution being pumped upwards by a forced circulation pump 19 into the heating chamber. After obtaining heat energy from the heating pipes in the heating chamber, the solution enters the evaporator 1 for boiling and evaporation. Secondary steam is discharged from the secondary steam pipe C at the top of the evaporator 1, and the liquid continues to circulate along the lower circulation pipe 18. Crystallized salt particles are discharged from the salt discharge outlet D below the salt leg 20. Heating steam enters through the heating steam inlet A and flows downwards through the gap between the heater shell and the heating tube bundle. The condensate after heat exchange is discharged from the condensate outlet B at the bottom of the heating chamber.

[0004] The current salt-making equipment has the following defects: The liquid level controlled by the evaporator 1 is generally about 1.5m above the flared end of the central tube 5. Due to the violent boiling and evaporation on the evaporation surface, a large amount of crystals precipitate out. The precipitated crystals sink due to gravity and fall onto the flared end support tube 15, or at the connection between the flared end support tube 15 and the tank wall of the evaporator 1. Over time, this accumulation can form lumps of salt. If not dealt with in time, the lumps of salt will grow larger and larger. Large lumps of salt covering the evaporation surface will affect the evaporation intensity of the brine and reduce production capacity. In addition, the falling large lumps of salt will impact the tank wall of the evaporator 1, which may cause damage to the tank wall and lead to brine leakage. Furthermore, large lumps of salt falling onto the salt leg 20 will affect the smoothness of salt discharge. Large lumps of salt entering the lower circulation pipe 18, passing through the forced circulation pump 19, will enter the lower end of the heater 16, which may cause large-area blockage of the heating chamber inside the heater 16, affecting the heat transfer of the system.

[0005] At present, there is no effective monitoring means for the formation of block salt in the evaporation tank. Usually, whether the block salt falls can be judged only by observing the change of the circulating pump current, but this method has a time difference and cannot prevent the formation of block salt and the occurrence of pipe blockage in time. Therefore, an effective device is needed to slow down or prevent the formation of block salt in the evaporation tank. Utility model content

[0006] To solve the above technical problems, the technical scheme provided by the utility model is: a flushing device for slowing down block salt in a vacuum salt evaporation tank, comprising:

[0007] A water supply system comprises a water supply coil arranged around the outside of the evaporation tank, and the water inlet of the water supply coil is connected with an external water source through a water inlet pipe;

[0008] A plurality of hollow support pipes are arranged in the evaporation tank, one end of each hollow support pipe is connected with the outer wall of the flared center pipe in the evaporation tank, and the other end penetrates to the outside of the evaporation tank and is connected with the water outlet of the water supply coil.

[0009] A plurality of flushing holes are arranged in the upper part of the hollow support pipe, and the flushing holes are uniformly distributed along the length direction of the hollow support pipe.

[0010] Preferably, a plurality of openings are arranged in the evaporation tank, and a sleeve corresponding to the position of the hollow support pipe is arranged in each opening, the hollow support pipe penetrates through the inside of the corresponding sleeve, and the inner end face of the sleeve and the outer wall of the hollow support pipe are sealed and welded by a lining plate.

[0011] Preferably, one end of the sleeve outside the evaporation tank is provided with a first flange connecting piece, and the extension section of the hollow support pipe outside the evaporation tank is provided with a second flange connecting piece matched with the first flange connecting piece, and the first flange connecting piece and the second flange connecting piece are fastened and connected by bolts.

[0012] Preferably, the first flange connecting piece is a carbon steel flange, and the second flange connecting piece is a titanium flange.

[0013] Preferably, the water outlet of the water supply coil is provided with a gate valve, and the end of the hollow support pipe away from the outer wall of the flared center pipe is connected with the gate valve through a third flange connecting piece.

[0014] Preferably, the third flange connecting piece is a titanium flange.

[0015] Preferably, an automatic flushing water valve is arranged on the water inlet pipe.

[0016] Preferably, an operation platform is further arranged outside the evaporation tank, and the water supply coil is installed above the operation platform.

[0017] The utility model discloses a flushing device for alleviating block salt in a vacuum salt-making evaporating tank, which belongs to the technical field of salt-making equipment.

[0018] Secondly, in terms of economic benefits, the application of the device significantly reduces equipment failure rate and maintenance cost. Since the formation of block salt is effectively controlled, the risk of damage to the evaporating tank wall is greatly reduced, and the maintenance workload is also correspondingly reduced.

[0019] In addition, the device also performs well in improving production efficiency. By reducing the formation of block salt and the occurrence of pipe blockage, the heat exchange efficiency of the heating chamber is significantly improved, thereby increasing the production capacity.

[0020] In summary, the flushing device for alleviating block salt in a vacuum salt-making evaporating tank provided by the present application is innovative in technology, feasible in economy, efficient in production, and superior in user experience, bringing significant benefits and improvements to the vacuum salt-making industry. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the structure of a salt-making equipment in the prior art.

[0022] Figure 2 is a schematic diagram of the structure of a flushing device for alleviating block salt in a vacuum salt-making evaporating tank.

[0023] Figure 3 is a top view schematic diagram of a flushing device for alleviating block salt in a vacuum salt-making evaporating tank.

[0024] Figure 4 is Figure 3 an enlarged schematic diagram of the structure of A in

[0025] As shown in the figure: 1, evaporating tank, 2, water supply coil, 3, water pipe, 4, hollow support pipe, 5, flared center pipe, 6, flushing hole, 7, sleeve, 8, lining plate, 9, operation platform, 10, first flange connecting piece, 11, second flange connecting piece, 12, gate valve, 13, third flange connecting piece, 14, automatic flushing water valve, 15, horn support pipe, 16, heater, 17, upper circulating pipe, 18, lower circulating pipe, 19, forced circulation pump, 20, salt leg. DETAILED DESCRIPTION

[0026] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0028] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0029] Furthermore, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection required by the present application.

[0030] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Figure 2 - the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Figure 4 The present application provides a kind of for slowing down vacuum salt evaporation tank agglomerated salt flushing device, comprising: water supply system, including the water supply coil pipe 2 being arranged around in evaporation tank 1 outside, the water inlet of water supply coil pipe 2 is connected with external water source by water inlet pipe 3;The specific size of water supply coil pipe 2 is about 406mm, wall thickness 8mm, its design aims at uniform distribution flushing water source.The water inlet of water supply coil pipe 2 is connected with external stable water source by a DN400 water inlet pipe 3, DN400 flushing water automatic valve 14 is additionally equipped on water inlet pipe 3, to facilitate operator accurate control the flow and opportunity of flushing water according to need.

[0031] Several hollow support tubes 4 are arranged circumferentially inside the evaporator 1. One end of each hollow support tube 4 is connected to the outer wall of the flared central tube 5 inside the evaporator 1, and the other end extends to the outside of the evaporator 1 and connects to the outlet of the water supply coil 2. Each hollow support tube 4 is made of titanium tubing with a specification of Φ219.1×6.0mm and is 3.5 meters long to ensure sufficient rinsing coverage area. One end of these hollow support tubes 4 is welded to the outer wall of the flared central tube 5 inside the evaporator 1, and the other end cleverly passes through the opening on the wall of the evaporator 1 to achieve a seamless connection with the outlet of the water supply coil 2. Specifically, 30 rinsing holes 6 with a diameter of 15mm are evenly distributed on the upper part of each hollow support tube 4. These rinsing holes 6 are set every 100mm, starting from 50mm from the end of the tube, to ensure a comprehensive and uniform rinsing effect. The rinsing holes 6 rinse the hollow support tube 4 itself and the surrounding area at regular intervals to prevent the formation of salt deposits on the evaporation surface.

[0032] In an optimized embodiment, the evaporator 1 has six openings in its wall. Each opening houses a Φ277×6.0mm carbon steel sleeve 7, 20cm in length, designed to accommodate the insertion of a hollow support tube 4. A 6mm thick titanium plate serves as a liner 8, sealing the inner end face of the sleeve 7 with the outer wall of the hollow support tube 4, effectively preventing brine leakage. Furthermore, a DN250 plate-type flat-welded carbon steel flange 10 is welded to the outer end of the sleeve 7 as the first flange connector 10, while a DN250 titanium flange 11 is welded to the corresponding position on the hollow support tube 4 as the second flange connector 11. The two are tightly connected by bolts, ensuring structural stability.

[0033] The outlet of the water supply coil 2 is equipped with a DN200 stainless steel gate valve 12. The end of each hollow support pipe 4 away from the flared central pipe 5 is connected to the DN200 PN16 (nominal diameter of 200mm, nominal pressure of 16bar) gate valve 12 through a DN200 plate flat welded titanium flange as the third flange connection 13, so as to realize the precise control and distribution of flushing water.

[0034] An automatic flushing water valve 14 with a specification of DN400 is installed on the water supply pipe 3, which allows operators to remotely control the start and stop of the flushing device according to actual needs, enhancing the convenience and flexibility of operation.

[0035] To facilitate installation, maintenance, and daily inspection, an operating platform 9 was added to the outside of the evaporator 1. The platform is constructed of carbon steel, is approximately 10 meters long and wide, has anti-slip patterned plates at the bottom, uses 16# channel steel for the support frame, and has guardrails made of ordinary square tubing, ensuring the safety of the workers.

[0036] The application firstly measures the size of the site space to confirm the installation position of the water supply coil 2 during the specific installation process. Then, according to the installation position of the water supply coil 2, the operation platform 9 is installed, which can be made of carbon steel with a length of about 10 m, the bottom plate is made of patterned plate, the support is 16# channel steel, and the guardrail is made of ordinary square tube.

[0037] Then, the scaffold is erected inside the evaporation tank 1 for subsequent operation. According to the welding position of the original horn support pipe 15, the original horn support pipe 15 is accurately cut off by using a plasma cutting machine, and 6 necessary openings are opened on the tank wall of the evaporation tank 1.

[0038] After that, 6 carbon steel sleeves 7 with a diameter of Φ277*6.0 mm and a length of 20 cm are prepared. One end of each sleeve 7 is welded with a DN250 PN16 (nominal diameter of 250 mm, nominal pressure of 16 bar) plate type flat welding titanium flange as the first flange connecting piece 10, and the other end is welded with the opening on the tank wall of the evaporation tank 1.

[0039] Then, 6 titanium pipes with a diameter of Φ219.1*6.0 mm are prepared as hollow support pipes 4, each with a length of 3.5 m. On the upper part of each hollow support pipe 4, a flushing hole 6 with a diameter of 15 mm is formed at a distance of 50 mm from the end, and the distance between adjacent two flushing holes 6 is 100 mm, and each can be punched 30 holes. The other end of the hollow support pipe 4 is welded with a DN200 PN16 (nominal diameter of 200 mm, nominal pressure of 16 bar) plate type flat welding titanium flange as the third flange connecting piece 13.

[0040] Then, the hollow support pipe 4 is inserted from the first flange connecting piece 10 and the sleeve 7, and the end is topped to the flared center pipe 5. In this process, the second flange connecting piece 11 is locked and the welding position is marked. After pulling out, the second flange connecting piece 11 is welded on the hollow support pipe 4. Then, the hollow support pipe 4 welded with the second flange connecting piece 11 is inserted from the first flange connecting piece 10 and the sleeve 7 again, and the end is topped to the flared center pipe 5, and the hollow support pipe 4 and the flared center pipe 5 are welded accordingly.

[0041] A 6 mm thick titanium plate is welded as a lining plate 8 at the inner end of the opening of the tank wall of the evaporation tank 1 to prevent brine from leaking into the sleeve 7. The outer end of the hollow support pipe 4 is installed with a DN200 PN16 (nominal diameter of 200 mm, nominal pressure of 16 bar) stainless steel gate valve 12 through the third flange connecting piece 13.

[0042] Finally, according to the position of the six gate valves 12, six 406*8mm stainless steel pipes and six 60° elbows are prepared, spliced into a regular hexagon outside the evaporation tank 1 and welded to form the water supply coil pipe 2. The lower part of the water supply coil pipe 2 is welded with a DN400 water inlet pipe 3, and the water inlet pipe 3 is additionally provided with a DN400 automatic flushing water valve 14 to control the water supply amount. All the above welding methods must use argon arc welding to ensure the welding quality.

[0043] The application connects a flushing water pump to the water inlet of the water inlet pipe 3, uses 40℃ steam condensate water as the flushing medium, and automatically starts the flushing water pump every 8 hours for 30 minutes of flushing operation. This design not only effectively prevents the accumulation and caking of salt in the support pipe and the surrounding area, but also significantly improves the evaporation capacity of the brine, slows down the pipe blocking phenomenon in the heating chamber, thereby improving the heat exchange efficiency and overall yield. In addition, the flushing water is directly sourced from the steam condensate water, without the need for additional water supply, and the flushing water pump can also be selected as the existing salt making accident pump, further reducing the operating cost.

[0044] In summary, the flushing device for slowing down the caking salt of the vacuum salt evaporation tank provided by the application has a unique structural design, precise size control and efficient flushing mechanism, which brings significant benefits and improvements to the vacuum salt industry.

[0045] The above describes the utility model and its implementation, which is not limited, and the drawings shown are only one of the embodiments of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired, without departing from the creative purpose of the utility model, without creative design, similar structural methods and embodiments of the technical solution should belong to the protection scope of the utility model.

Claims

1. A rinsing device for reducing salt agglomeration in a vacuum salt-making evaporator, characterized in that, include: The water supply system includes a water supply coil (2) surrounding the outside of the evaporator (1), and the water inlet of the water supply coil (2) is connected to an external water source through a water inlet pipe (3). Several hollow support tubes (4) are arranged around the inside of the evaporator (1). One end of each hollow support tube (4) is connected to the outer wall of the flared central tube (5) inside the evaporator (1), and the other end extends through to the outside of the evaporator (1) and is connected to the outlet of the water supply coil (2). A flushing hole (6) is provided on the upper part of the hollow support tube (4), and a number of flushing holes (6) are evenly distributed along the length direction of the hollow support tube (4).

2. A rinsing device for reducing salt agglomeration in a vacuum salt-making evaporator according to claim 1, characterized in that, The evaporator (1) has several openings in its wall. Each opening has a sleeve (7) corresponding to the position of the hollow support tube (4). The hollow support tube (4) passes through the inside of the corresponding sleeve (7), and the inner end face of the sleeve (7) and the outer wall of the hollow support tube (4) are sealed and welded together by a liner (8).

3. A rinsing device for reducing salt agglomeration in a vacuum salt-making evaporator according to claim 2, characterized in that, The sleeve (7) is provided with a first flange connector (10) at one end outside the evaporator (1), and the hollow support pipe (4) is provided with a second flange connector (11) that matches the first flange connector (10) on the extension section outside the evaporator (1), and the first flange connector (10) and the second flange connector (11) are fastened together by bolts.

4. A rinsing device for reducing salt agglomeration in a vacuum salt-making evaporator according to claim 3, characterized in that, The first flange connector (10) is a carbon steel flange, and the second flange connector (11) is a titanium flange.

5. A rinsing device for slowing down salt agglomeration in a vacuum salt-making evaporator according to claim 1, characterized in that, The outlet of the water supply coil (2) is equipped with a gate valve (12), and the end of the hollow support pipe (4) away from the outer wall of the flared central pipe (5) is connected to the gate valve (12) through a third flange connector (13).

6. A rinsing device for slowing down salt agglomeration in a vacuum salt-making evaporator according to claim 5, characterized in that, The third flange connector (13) is a titanium flange.

7. A rinsing device for reducing salt agglomeration in a vacuum salt-making evaporator according to claim 1, characterized in that, The water supply pipe (3) is equipped with an automatic flushing water valve (14).

8. A rinsing device for slowing down salt agglomeration in a vacuum salt-making evaporator according to claim 1, characterized in that, An operating platform (9) is also provided on the outside of the evaporator (1), and a water supply coil (2) is installed above the operating platform (9).

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