Evaporation and concentration device for hydrochloric acid pickling waste liquid

Abstract

The utility model discloses an evaporation and concentration device for hydrochloric acid pickling waste liquid. The evaporation and concentration device comprises a tank body, a motor, a rotating shaft, a partition plate, a lantern ring, a scraping ring, a heater, a connecting assembly and an exhaust assembly, a liquid inlet is formed in the top of the tank body; a discharge port is formed in the bottom of the tank body The partition plate is provided with an electromagnetic valve, is fixedly connected to the middle of the tank body and divides the interior of the tank body into a liquid storage chamber and an evaporation chamber from top to bottom; the rotating shaft penetrates through the middle of the partition plate and is connected with the output end of a motor arranged at the top of the tank body, the part, located in the evaporation chamber, of the rotating shaft is in threaded transmission with a lantern ring, the lantern ring is connected with a scraping ring through a connecting assembly, the scraping ring is coaxial with the lantern ring, and the outer surface of the scraping ring is matched with the inner surface of the evaporation chamber; the motor drives the rotating shaft to rotate to drive the lantern ring to linearly move up and down so as to drive the scraping ring to reciprocate up and down; the heater is located in the evaporation chamber and fixedly connected with the tail end of the rotating shaft, and steam is exhausted from the upper side wall of the evaporation chamber through an exhaust assembly. According to the utility model, crystals on the inner wall can be quickly cleaned in real time.

Description

Technical Field

[0001] This utility model relates to the field of hydrochloric acid waste liquid treatment technology, and in particular to an evaporation and concentration device for hydrochloric acid pickling waste liquid. Background Technology

[0002] After surface treatment of workpieces using hydrochloric acid and sulfuric acid, a large amount of waste hydrochloric acid is generated. To reuse this waste hydrochloric acid, it needs to be screened and concentrated, thus requiring an evaporation and concentration device. Existing evaporation and concentration devices are relatively complex in structure, inconvenient to operate, affecting work efficiency and cost, and cannot efficiently utilize the discharged heat. Furthermore, after evaporation, a large amount of crystals adhere to the inside of the evaporation and concentration device, making cleaning difficult and resulting in low practicality. Utility Model Content

[0003] In view of this, the present invention provides an evaporation and concentration device for hydrochloric acid pickling waste liquid, which can realize real-time and rapid cleaning of crystals on the inner wall.

[0004] This utility model is achieved through the following technical solution: an evaporation and concentration device for hydrochloric acid pickling waste liquid, comprising a tank, a motor, a rotating shaft, a partition, a collar, a scraper ring, a heater, a connecting assembly, and an exhaust assembly; the tank has an inlet at the top and an outlet at the bottom; the partition is fixedly connected to the middle of the tank, dividing the interior of the tank into a storage chamber and an evaporation chamber from top to bottom; the partition is equipped with a solenoid valve, which opens to allow waste liquid in the corresponding storage chamber to flow into the evaporation chamber; the rotating shaft passes through the middle of the partition and is connected to the output end of the motor located at the top of the tank, and the rotating shaft in the evaporation chamber is threadedly driven by the collar, the collar being connected to the scraper ring through the connecting assembly, the scraper ring and the collar being coaxial, and the outer surface of the scraper ring fitting with the inner surface of the evaporation chamber; the motor drives the rotating shaft to rotate, causing the collar to move up and down linearly, thereby causing the scraper ring to move up and down reciprocally; the heater is located in the evaporation chamber and is fixedly connected to the end of the rotating shaft, and steam is discharged from the upper side wall of the evaporation chamber through the exhaust assembly.

[0005] Furthermore, the exhaust assembly includes an exhaust pipe, a heat exchanger, and a drain pipe; one end of the exhaust pipe is connected to the upper side wall of the evaporation chamber, and the other end of the exhaust pipe is connected to the drain pipe through the heat exchanger; the heat exchanger penetrates the liquid storage chamber for heat exchange between steam and waste liquid.

[0006] Furthermore, the heat exchanger consists of a first connecting pipe, a second connecting pipe, and several branch pipes. The branch pipes all slope downwards and penetrate the opposite side walls of the liquid storage chamber. The upper end of each branch pipe is connected to the exhaust pipe through the first connecting pipe, and the lower end of each branch pipe is connected to the drain pipe through the second connecting pipe.

[0007] Furthermore, it also includes a disc, support rods, and scrapers; the bottom of the tank is a frustum structure, with the large-diameter end of the frustum connected to the side wall of the tank, the disc fixed to the bottom of the rotating shaft, and several scrapers fixed to the disc through several radial support rods, with the scrapers cooperating with the inner wall of the frustum structure.

[0008] Furthermore, the connecting assembly includes a connecting plate, a guide rod, and a limiting block; several connecting plates are radially and evenly arranged on the same plane, with both ends of the connecting plate fixedly connected to a collar and a scraper ring, respectively; the guide rod passes through the middle of the connecting plate, with the top end of the guide rod fixedly connected to a partition plate, and a limiting block provided at the bottom end of the guide rod.

[0009] Compared with existing technologies, the beneficial effects of this utility model are:

[0010] 1. This utility model uses a rotating shaft and a collar threaded drive to drive the scraper ring to move up and down reciprocally, thereby achieving the purpose of cleaning the crystals on the inner wall of the tank in real time, eliminating the need for manual cleaning and greatly improving work efficiency.

[0011] 2. This utility model can efficiently utilize the heat of the discharged steam to exchange heat with the waste liquid to be evaporated, which not only improves the concentration efficiency, but also cools the waste liquid to be evaporated by the steam to liquefy it, making it easier to discharge.

[0012] 3. The bottom of the tank of this utility model is a truncated cone structure, which facilitates the discharge of waste liquid. At the same time, a scraper is used, which is driven by the rotation of the rotating shaft to rotate along the inner wall of the truncated cone to clean the crystals attached thereto. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the heat exchange component of this utility model.

[0016] Figure 4 This is a schematic diagram of the cleaning component of this utility model.

[0017] Among them, 101-tank body, 102-motor, 103-rotating roller, 104-threaded rod, 105-ring, 106-scraper ring, 107-disc, 108-heater, 109-partition plate, 110-first solenoid valve, 111-second solenoid valve, 112-connecting plate, 113-guide rod, 114-limiting block, 115-exhaust pipe, 116-first connecting pipe, 117-branch pipe, 118-second connecting pipe, 119-drain pipe, 120-support rod, 121-scraper. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0019] This invention provides an evaporation and concentration device for hydrochloric acid pickling waste liquid, such as... Figure 1 , 2 As shown, the device includes a tank 101, a motor 102, a rotating shaft, a partition 109, a collar 105, a scraper ring 106, a heater 108, a connecting assembly, and an exhaust assembly.

[0020] The tank 101 has an inlet at the top and an outlet at the bottom; a partition 109 is fixed to the middle of the tank 101, and the partition 109 divides the interior of the tank 101 into a storage chamber and an evaporation chamber from top to bottom; the partition 109 is equipped with a second solenoid valve 111, and the second solenoid valve 111 opens the waste liquid in the corresponding storage chamber to flow into the evaporation chamber.

[0021] like Figure 2 As shown, the rotating shaft passes through the middle of the partition 109 and is connected to the output end of the motor 102 located at the top of the tank 101. The part of the rotating shaft located in the evaporation chamber is threadedly driven by the collar 105. In this embodiment, the rotating shaft is composed of a rotating roller 103 and a threaded rod 104 connected sequentially from top to bottom. The collar 105 is threadedly engaged with the threaded rod 104. The collar 105 is connected to the scraper ring 106 through a connecting assembly. The scraper ring 106 is coaxial with the collar 105, and the outer surface of the scraper ring 106 is engaged with the inner surface of the evaporation chamber. The motor 102 drives the rotating roller 103 to rotate, which in turn drives the threaded rod 104 to rotate, causing the collar 105 to move linearly up and down along the threaded rod 104, thereby driving the scraper ring 106 to move up and down reciprocally.

[0022] Specifically, the connecting assembly includes a connecting plate 112, a guide rod 113, and a limiting block 114. Several connecting plates 112 are radially and uniformly arranged on the same plane. The two ends of each connecting plate 112 are fixedly connected to a collar 105 and a scraper ring 106, respectively. A guide rod 113, corresponding to each connecting plate 112, passes through the middle of the connecting plate 112. The top end of each guide rod 113 is fixedly connected to a partition plate 109, and a limiting block 114 is provided at the bottom end of each guide rod 113. Of course, one connecting plate 112 can correspond to two or more guide rods 113. In specific implementations, the tank body 101 can be a cylindrical structure, with the scraper ring 106 being a circular ring. Alternatively, the tank body 101 can be a box-type structure, with the scraper ring 106 being rectangular.

[0023] The heater 108 is located in the evaporation chamber and is fixedly connected to the end of the rotating shaft (threaded rod 104). Steam is discharged from the upper side wall of the evaporation chamber through the exhaust assembly. Figure 3As shown, the exhaust assembly includes an exhaust pipe 115, a heat exchanger, and a drain pipe 119. One end of the exhaust pipe 115 is connected to the upper side wall of the evaporation chamber, and the other end of the exhaust pipe 115 is connected to the drain pipe 119 through the heat exchanger. The heat exchanger penetrates the storage chamber for heat exchange between steam and waste liquid. Specifically, the heat exchanger consists of a first connecting pipe 116, a second connecting pipe 118, and several branch pipes 117. Each branch pipe 117 slopes downwards and penetrates the opposite side walls of the storage chamber. The upper end of each branch pipe 117 is connected to the exhaust pipe 115 through the first connecting pipe 116, and the lower end of each branch pipe 117 is connected to the drain pipe 119 through the second connecting pipe 118. In this embodiment, the branch pipes 117 are parallel to each other, and the first connecting pipe 116 and the second connecting pipe 118 are perpendicular to each other.

[0024] To ensure rapid discharge of the concentrated waste liquid, the bottom of tank 101 is a frustum-shaped structure. The large-diameter end of the frustum connects to the side wall of tank 101, and the discharge outlet is located at the small-diameter end of the frustum. A first solenoid valve 110 can also be installed at the discharge outlet for remote control. During the evaporation process, crystals will remain on the inner wall of the frustum structure; therefore... Figure 4 As shown, a disc 107, a support rod 120, and scrapers 121 are provided. The disc 107 is fixed to the bottom end of the rotating shaft (threaded rod 104). Several scrapers 121 are fixed to the disc 107 through the support rods 120. The support rods 120 are radial and inclined downwards. The scrapers 121 cooperate with the inner wall of the frustum structure. The rotation of the rotating shaft drives the disc 107 to rotate, so that the scrapers 121 rotate along the inner wall of the frustum structure to clean the crystals.

[0025] The working principle of this device is as follows: Waste liquid is added into the storage chamber of tank 101 through the inlet. The second solenoid valve 111 is opened, allowing the waste liquid in the storage chamber above the partition 109 to flow into the evaporation chamber below the partition 109. The second solenoid valve 111 is then closed, and waste liquid continues to be added to the storage chamber above the partition 109. The waste liquid in the evaporation chamber below the partition 109 is heated by the heater 108, thereby evaporating and concentrating the waste liquid. The steam is discharged through the exhaust pipe 115 into the first connecting pipe 116, and from the first connecting pipe 116 into several branch pipes 117, thus transferring heat to the waste liquid to be evaporated, preheating the waste liquid to be evaporated, and thereby increasing the heat utilization rate. In terms of efficiency, the steam in several branch pipes 117 is cooled and liquefied, then collected in the second connecting pipe 118 and finally discharged through the drain pipe 119. Afterwards, the first solenoid valve 110 is opened to discharge the concentrated waste liquid. The motor 102 is started, and its output drives the rotating roller 103 to rotate. The rotating roller 103 drives the threaded rod 104 to rotate, causing the collar 105 to drive the connecting plate 112 to slide up and down along the guide rod 113. The connecting plate 112 drives the scraper ring 106 to move up and down, cleaning the crystals on the inner wall of the evaporation chamber of the tank 101. Simultaneously, the disc 107 rotates, causing the scraper 121 to rotate along the inner wall of the frustum-shaped structure to clean the crystals on it. This device effectively solves the problem in the prior art where a large amount of crystals adhere to the inside of the tank 101 after evaporation, making cleaning difficult and resulting in low practicality.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An evaporation and concentration device for hydrochloric acid pickling waste liquid, characterized in that, Includes tank body, motor, rotating shaft, baffle, collar, scraper ring, heater, connecting assembly and exhaust assembly; The tank has an inlet at the top and an outlet at the bottom. A baffle is fixed to the middle of the tank, dividing the interior of the tank into a storage chamber and an evaporation chamber from top to bottom. The baffle is equipped with a solenoid valve, which opens the corresponding storage chamber and allows waste liquid to flow into the evaporation chamber. The rotating shaft passes through the middle of the partition and is connected to the output end of the motor located at the top of the tank. The rotating shaft is located in the evaporation chamber and is threaded to the collar. The collar is connected to the scraper ring through a connecting assembly. The scraper ring and the collar are coaxial, and the outer surface of the scraper ring is in contact with the inner surface of the evaporation chamber. The motor drives the rotating shaft to rotate, which drives the collar to move up and down linearly, thereby driving the scraper ring to move up and down reciprocally. The heater is located in the evaporation chamber and is fixed to the end of the rotating shaft. Steam is discharged from the upper side wall of the evaporation chamber through the exhaust assembly.

2. The apparatus for evaporative concentration of hydrochloric acid pickling spent liquor according to claim 1, characterized in that, The exhaust assembly includes an exhaust pipe, a heat exchanger, and a drain pipe; one end of the exhaust pipe is connected to the upper side wall of the evaporation chamber, and the other end of the exhaust pipe is connected to the drain pipe through the heat exchanger; the heat exchanger penetrates the liquid storage chamber for heat exchange between steam and waste liquid.

3. The apparatus for evaporative concentration of hydrochloric acid pickling spent liquor according to claim 2, characterized in that, The heat exchanger consists of a first connecting pipe, a second connecting pipe, and several branch pipes. The branch pipes all slope downwards and penetrate the opposite side walls of the liquid storage chamber. The upper end of each branch pipe is connected to the exhaust pipe through the first connecting pipe, and the lower end of each branch pipe is connected to the drain pipe through the second connecting pipe.

4. The apparatus for evaporative concentration of hydrochloric acid pickling spent liquor according to any one of claims 1 to 3, characterized in that, It also includes a disc, support rods, and scrapers; the bottom of the tank is a frustum structure, with the large-diameter end of the frustum connected to the side wall of the tank, the disc fixed to the bottom of the rotating shaft, and several scrapers fixed to the disc through several radial support rods, with the scrapers cooperating with the inner wall of the frustum structure.

5. The apparatus for evaporative concentration of hydrochloric acid pickling spent liquor according to claim 4, characterized in that, The connecting assembly includes a connecting plate, a guide rod, and a limiting block; several connecting plates are radially and evenly arranged on the same plane, with both ends of the connecting plate fixed to a collar and a scraper ring, respectively; the guide rod passes through the middle of the connecting plate, with the top end of the guide rod fixed to a partition plate, and a limiting block provided at the bottom end of the guide rod.

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