Low-temperature evaporation equipment for stainless steel pickling

Abstract

The utility model provides low-temperature evaporation equipment for stainless steel pickling, which relates to the technical field of stainless steel pickling wastewater processing and comprises a low-temperature evaporator body, the low-temperature evaporator body comprises a feed pipe and a discharge pipe, and a vacuum pump communicated with the interior of the low-temperature evaporator body is fixedly arranged on the low-temperature evaporator body. A condenser is arranged on one side of the low-temperature evaporator body; according to the application, acid gas in the stainless steel pickling wastewater can be neutralized and effectively removed before gas generated in the low-temperature evaporation process of the stainless steel pickling wastewater is introduced into the condenser, so that the probability that metal parts in the condenser are corroded is remarkably reduced, and meanwhile, bubbles can be automatically detected and effectively removed in the low-temperature evaporation process; therefore, the stability and safety of subsequent evaporation work are ensured, and the low-temperature evaporation effect on the stainless steel pickling wastewater is remarkably improved.

Description

A low-temperature evaporation device for pickling stainless steel Technical Field

[0001] This utility model relates to the field of stainless steel pickling wastewater processing technology, and more specifically, to a low-temperature evaporation device for stainless steel pickling. Background Technology

[0002] Stainless steel pickling is an industrial cleaning technology that typically involves pickling and passivation paste and pickling and passivation solution. The pickling and passivation paste combines pickling and passivation simultaneously. The stainless steel pickling process generates pickling wastewater, which currently requires a low-temperature evaporation process. The low-temperature evaporation equipment for pickling wastewater uses a low-temperature vacuum evaporation process to evaporate the wastewater at low temperatures. Based on the action of the vacuum pump, the material is boiled at a temperature of 30℃~40℃, which allows the aqueous extract to quickly turn into a dry powdery solid, minimizing the discharge of hazardous waste liquid.

[0003] Announcement No. CN218931767U proposes a low-temperature evaporator for wastewater treatment, which can achieve low-temperature evaporation of wastewater. However, for stainless steel pickling wastewater, low-temperature evaporation will produce acidic gas. If the acidic gas is directly introduced into the condenser, it will cause corrosion of the metal parts in the condenser. At the same time, bubbles will be generated during the low-temperature evaporation of stainless steel pickling wastewater. Conventional low-temperature evaporators cannot effectively eliminate the bubbles generated inside in a timely manner during operation, thus failing to ensure the stability and safety of subsequent evaporation. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to propose a low-temperature evaporation device for pickling stainless steel.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A low-temperature evaporation device for stainless steel pickling includes a low-temperature evaporator body, which includes an inlet pipe and a outlet pipe. A vacuum pump connected to the interior of the low-temperature evaporator body is fixed on the body, and a condenser is installed on one side of the body. The device also includes a corrosion-resistant suction fan, a purification chamber, an alkaline solution atomizing spray assembly, a drain assembly, an outlet pipe, a demister, a non-contact foam detection device, and an atomizing defoaming assembly.

[0007] The corrosion-resistant suction fan and the purification box are both fixed on the low-temperature evaporator body, and the corrosion-resistant suction fan is connected to the inside of the low-temperature evaporator body, and the bottom of the purification box is connected to the output pipe of the corrosion-resistant suction fan.

[0008] The alkaline solution atomizing spray assembly is installed inside the purification chamber;

[0009] The drainage assembly connects to the interior of the purification chamber;

[0010] The exhaust pipe is fixed in the upper part of the purification box;

[0011] The demister is fixed on the purification box and connected to the air outlet pipe; the output end of the demister is connected to the condenser.

[0012] The non-contact foam detection element is fixed inside the low-temperature evaporator body;

[0013] The rotatable atomizing defoaming component is housed within the low-temperature evaporator body, and both the atomizing defoaming component and the non-contact foam detection component are electrically connected to the controller.

[0014] Furthermore, the alkaline solution atomizing spray assembly includes a first suction pump, a main pipe, and a first atomizing nozzle.

[0015] The first suction pump is fixed on the purification box;

[0016] The main pipe is fixed inside the purification chamber and connected to the first suction pump;

[0017] Several first atomizing nozzles are connected to the main pipe.

[0018] Furthermore, the drainage assembly includes a flow guide platform, a drainage pipe, and a valve.

[0019] The flow guide is tilted and fixed inside the purification chamber;

[0020] The drain pipe connects to the inside of the purification box and is located at the end of the flow guide platform;

[0021] The valve is located on the drain pipe.

[0022] Furthermore, the non-contact foam detection component employs either a photoelectric sensor or an ultrasonic sensor.

[0023] Furthermore, the atomizing defoaming assembly includes a delivery pipe, a gear transmission assembly, a second suction pump, a rotary joint, a defoaming shell, and a second atomizing nozzle.

[0024] The delivery pipe is rotatably connected to the low-temperature evaporator body, and the delivery pipe is connected to the gear transmission assembly fixed on the low-temperature evaporator body.

[0025] The second suction pump is connected to one end of the delivery pipe via a rotary joint;

[0026] The defoaming shell is fixedly connected to and communicates with the other end of the delivery pipe;

[0027] Several second atomizing nozzles are circumferentially fixed on the defoaming shell and connected to the interior of the defoaming shell.

[0028] Furthermore, the bottom center of the defoaming shell is fixed with mounting rollers that are spaced apart from the second atomizing nozzle, and several stirring rods are symmetrically fixed on the mounting rollers.

[0029] Furthermore, the low-temperature evaporator body, feed pipe, and discharge pipe are all made of 316L stainless steel.

[0030] Compared with the prior art, the beneficial effects of this utility model are:

[0031] Compared with existing technologies, this application can neutralize and effectively remove acidic gases generated during the low-temperature evaporation of stainless steel pickling wastewater before introducing them into the condenser, thereby significantly reducing the probability of corrosion of metal components in the condenser. At the same time, it can automatically detect and effectively defoam bubbles during the low-temperature evaporation process, thus ensuring the stability and safety of subsequent evaporation work and significantly improving the low-temperature evaporation effect of stainless steel pickling wastewater. Attached Figure Description

[0032] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0033] Figure label:

[0034] 1. Low-temperature evaporator body; 2. Corrosion-resistant suction fan; 3. Purification chamber; 4. Air outlet pipe; 5. Demister; 6. Non-contact foam detection device; 7. First suction pump; 8. Main pipe; 9. First atomizing nozzle; 10. Guide platform; 11. Drain pipe; 12. Valve; 13. Delivery pipe; 14. Gear transmission assembly; 15. Second suction pump; 16. Rotary joint; 17. Defoamer shell; 18. Second atomizing nozzle; 19. Mounting roller; 20. Stirring rod; 21. Flow valve. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0036] As shown in Figure 1, a low-temperature evaporation device for stainless steel pickling includes a low-temperature evaporator body 1, which includes a feed pipe and a discharge pipe (all three are made of 316L stainless steel). A vacuum pump connected to the interior of the low-temperature evaporator body 1 is fixed on it (the vacuum pump, feed pipe, and discharge pipe are not labeled in the figure, and both are equipped with solenoid valves). A condenser (not shown in the figure) is located on one side of the low-temperature evaporator body 1. The device also includes a corrosion-resistant suction fan 2, a purification chamber 3, an alkaline solution atomizing spray assembly, a drain assembly, an exhaust pipe 4, a demister 5, a non-contact foam detection element 6, and an atomizing defoaming assembly.

[0037] The corrosion-resistant suction fan 2 and the purification box 3 are both fixed on the low-temperature evaporator body 1, and the corrosion-resistant suction fan 2 is connected to the inside of the low-temperature evaporator body 1, and the bottom of the purification box 3 is connected to the output pipe of the corrosion-resistant suction fan 2.

[0038] The alkaline solution atomizing spray assembly is installed inside the purification box 3;

[0039] The drainage component connects to the interior of purification box 3;

[0040] The exhaust pipe 4 is fixed in the upper part of the purification box 3;

[0041] The demister 5 is fixed on the purification box 3 and connected to the air outlet pipe 4. The output end of the demister 5 is connected to the condenser.

[0042] The non-contact foam detection element 6 is fixed inside the low-temperature evaporator body 1 (specifically, the non-contact foam detection element adopts either a photoelectric sensor or an ultrasonic sensor).

[0043] The principle of photoelectric sensors: When bubbles are generated, they change the propagation path of light. The sensor detects the change in light and can then determine that there are bubbles.

[0044] The principle of ultrasonic sensors: When ultrasonic sensors emit ultrasonic waves, these waves are reflected when they encounter bubbles. The reflected signal indicates whether a bubble has been generated.

[0045] The rotatable atomizing defoaming component is installed inside the low-temperature evaporator body 1, and both the atomizing defoaming component and the non-contact foam detection component are electrically connected to the controller.

[0046] As shown in Figure 1, the specific implementation of this utility model embodiment includes a first suction pump 7, a main pipe 8, and a first atomizing nozzle 9.

[0047] The first suction pump 7 is fixed on the purification box 3;

[0048] The main pipe 8 is fixed inside the purification box 3 and connected to the first suction pump 7;

[0049] Several first atomizing nozzles 9 are connected to the main pipe 8.

[0050] As shown in Figure 1, the specific implementation of this utility model embodiment includes a flow guide platform 10, a drainage pipe 11, and a valve 12.

[0051] The flow guide 10 is tilted and fixed inside the purification box 3;

[0052] The drain pipe 11 is connected to the interior of the purification box 3 and is located on one side of the end of the guide platform 10;

[0053] Valve 12 is installed on drain pipe 11.

[0054] As shown in Figure 1, the specific implementation of this utility model embodiment includes a delivery pipe 13, a gear transmission assembly 14, a second suction pump 15, a rotary joint 16, a defoaming shell 17, and a second atomizing nozzle 18.

[0055] The conveying pipe 13 is rotatably connected to the low-temperature evaporator body 1, and the conveying pipe 13 is connected to the gear transmission assembly 14 fixed on the low-temperature evaporator body 1. (It should be noted that the connection between the conveying pipe 13 and the low-temperature evaporator body 1 is sealed, so as not to affect the operation of the low-temperature evaporator body 1. The sealing treatment can be done by existing conventional means, which will not be elaborated.)

[0056] The second suction pump 15 is connected to one end of the delivery pipe 13 via a rotary joint 16;

[0057] The defoaming shell 17 is fixedly connected to and communicates with the other end of the delivery pipe 13;

[0058] Several second atomizing nozzles 18 are circumferentially fixed on the defoaming shell 17 and connected to the interior of the defoaming shell 17.

[0059] To ensure thorough mixing of the defoamer with the pickling wastewater, the above-described embodiment is further optimized as shown in Figure 1. An installation roller 19, spaced apart from the second atomizing nozzle 18, is fixed at the bottom center of the defoamer shell 17, and several stirring rods 20 are symmetrically fixed on the installation roller 19.

[0060] It should be noted that the corrosion-resistant suction fan 2, demister 5, non-contact foam detection component 6, first suction pump 7, gear transmission assembly 14, and second suction pump 15 are all electrically connected to the controller, which is not shown in the figure.

[0061] The working process of this utility model is as follows:

[0062] First, stainless steel pickling wastewater is added into the low-temperature evaporator body 1 through the feed pipe. At this time, the solenoid valve on the drain pipe 11 is closed. After the quantitative addition of stainless steel pickling wastewater is completed, the solenoid valve on the feed pipe is also closed. Then, the low-temperature evaporator body 1 can be started to treat the stainless steel pickling wastewater.

[0063] During the low-temperature evaporation process, acidic gases, water vapor, and inert gases are generated. These gases are then guided into the purification chamber 3 by the corrosion-resistant suction fan 2. At the same time, the first suction pump 7 is controlled by the controller to carry out the atomization and neutralization process of the acidic gases. After neutralization, the acidic gases are removed, and the remaining water vapor and inert gases flow into the condenser through the demister 5. The demister 5 can prevent the atomized alkaline solution from entering the condenser. As the neutralization reaction proceeds, droplets will be generated in the purification chamber 3. After the droplets accumulate for a period of time, the valve 12 is opened to discharge the material. This reduces the probability of corrosion of the metal parts in the condenser.

[0064] Meanwhile, when the non-contact foam detector 6 detects bubbles generated during the low-temperature evaporation process, it immediately sends a signal to the controller. The controller then controls the gear transmission assembly 14 (which consists of a servo motor, a main gear, and a secondary gear; its working principle is not described here as existing technology) to drive the conveying pipe 13 to rotate slowly in conjunction with the defoaming shell 17. At the same time, the second suction pump 15 is also activated, which sprays atomized defoamer onto the bubbles to eliminate them. The slow rotation further expands the coverage area after the atomized defoamer is sprayed, resulting in a better defoaming effect. Stirring is also combined with spraying the defoamer to ensure that the defoamer is fully mixed with the bubbles in the pickling wastewater. It should be noted that because the stirring speed is slow, no bubbles are generated during the stirring process. After completing the low-temperature evaporation process of a batch of stainless steel pickling wastewater, the remaining material after evaporation can be discharged through the discharge pipe.

[0065] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-temperature evaporation device for pickling stainless steel, comprising a low-temperature evaporator body (1), the low-temperature evaporator body (1) including a feed pipe and a discharge pipe, a vacuum pump connected to the interior of the low-temperature evaporator body (1) being fixedly mounted thereon, and a condenser being provided on one side of the low-temperature evaporator body (1), characterized in that, It also includes a corrosion-resistant suction fan (2), a purification box (3), an alkaline atomizing spray assembly, a drain assembly, an air outlet pipe (4), a demister (5), a non-contact foam detection device (6), and an atomizing defoaming assembly. The corrosion-resistant suction fan (2) and the purification box (3) are both fixed on the low-temperature evaporator body (1), and the corrosion-resistant suction fan (2) is connected to the inside of the low-temperature evaporator body (1). The bottom of the purification box (3) is connected to the output pipe of the corrosion-resistant suction fan (2). The alkaline atomizing spray assembly is set in The purification chamber (3) is inside; the drain assembly is connected to the purification chamber (3); the air outlet pipe (4) is fixed in the upper area of ​​the purification chamber (3); the demister (5) is fixed on the purification chamber (3) and connected to the air outlet pipe (4), and the output end of the demister (5) is connected to the condenser; the non-contact foam detection component (6) is fixed inside the low-temperature evaporator body (1); the rotatable atomizing defoaming component is set inside the low-temperature evaporator body (1), and both the atomizing defoaming component and the non-contact foam detection component are electrically connected to the controller.

2. The low-temperature evaporation equipment for pickling stainless steel according to claim 1, characterized in that, The alkaline solution atomizing spray assembly includes a first suction pump (7), a main pipe (8), and a first atomizing nozzle (9). The first suction pump (7) is fixed on the purification box (3); the main pipe (8) is fixed inside the purification box (3) and connected to the first suction pump (7); and a plurality of first atomizing nozzles (9) are connected to the main pipe (8).

3. The low-temperature evaporation equipment for pickling stainless steel according to claim 1, characterized in that, The drainage assembly includes a flow guide (10), a drainage pipe (11), and a valve (12). The flow guide (10) is inclined and fixed inside the purification box (3). The drainage pipe (11) is connected to the inside of the purification box (3) and is located on one side of the end of the flow guide (10). The valve (12) is installed on the drainage pipe (11).

4. The low-temperature evaporation equipment for pickling stainless steel according to claim 1, characterized in that, The non-contact foam detection component (6) uses either a photoelectric sensor or an ultrasonic sensor.

5. A low-temperature evaporation device for pickling stainless steel according to claim 1, characterized in that, The atomizing defoaming assembly includes a delivery pipe (13), a gear transmission assembly (14), a second suction pump (15), a rotary joint (16), a defoaming shell (17), and a second atomizing nozzle (18). The delivery pipe (13) is rotatably connected to the low-temperature evaporator body (1), and the delivery pipe (13) is connected to the gear transmission assembly (14) fixed on the low-temperature evaporator body (1). The second suction pump (15) is connected to one end of the delivery pipe (13) through the rotary joint (16). The defoaming shell (17) is fixed and connected to the other end of the delivery pipe (13). Several second atomizing nozzles (18) are circumferentially fixed on the defoaming shell (17) and connected to the inside of the defoaming shell (17).

6. A low-temperature evaporation device for pickling stainless steel according to claim 5, characterized in that, The bottom center of the defoaming shell (17) is fixed with mounting rollers (19) that are spaced apart from the second atomizing nozzle (18), and a number of stirring rods (20) are symmetrically fixed on the mounting rollers (19).

7. A low-temperature evaporation device for pickling stainless steel according to claim 1, characterized in that, The low-temperature evaporator body (1), feed pipe and discharge pipe are all made of 316L stainless steel.

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