Device for preparing leather tanning agent by recycling chromium-containing wastewater

Abstract

The utility model discloses a device for preparing a leather tanning agent by recycling chromium-containing wastewater, which comprises an equipment base and a recycling sedimentation tank, the recycling sedimentation tank is mounted on the equipment base, and a uniform reactant moving and throwing structure is mounted on the recycling sedimentation tank; the utility model relates to the technical field of waste water recovery equipment, and has the beneficial effects that the problems that in the existing waste water treatment, reactants are directly and manually fed into chromium-containing waste water for reaction and precipitation, but fixed feeding is mostly adopted, so that the reactants are not fully mixed with the waste water, the precipitation efficiency of chromium ions and the quality of tanning agents are influenced, and the production cost is high are solved; and the problems that the operation complexity and the energy consumption are increased due to the fact that the sediment directly sinks at the bottom of the reaction tank, cleaning and maintenance are inconvenient, and an integrated movable throwing and sediment discharging system is lacked are solved.

Description

Technical Field

[0001] This utility model relates to the field of wastewater recycling equipment technology, specifically to a device for preparing leather tanning agents by recycling chromium-containing wastewater. Background Technology

[0002] The large-scale discharge of chromium-containing wastewater during leather production has caused serious environmental pollution. Chromium ions are highly toxic and difficult to degrade, and direct discharge can harm ecosystems and human health. Chromium-containing wastewater is often treated using technologies such as chemical precipitation and ion exchange to recover chromium ions and convert them into tanning agents. This not only realizes waste resource utilization but also reduces production costs. Existing wastewater treatment methods often involve manually adding reactants directly into the chromium-containing wastewater to cause reaction and precipitation. However, fixed feeding methods are commonly used, resulting in insufficient mixing between the reactants and wastewater, which affects the precipitation efficiency of chromium ions and the quality of tanning agents. Furthermore, the precipitates settle directly at the bottom of the reaction tank, making cleaning and maintenance inconvenient. The lack of integrated mobile spraying and sedimentation discharge systems increases operational complexity and energy consumption. Utility Model Content

[0003] To achieve the above objectives, this utility model is implemented through the following technical solution: an apparatus for preparing leather tanning agent by recovering chromium-containing wastewater, comprising: an equipment base and a recovery sedimentation tank, wherein the recovery sedimentation tank is installed on the equipment base and a uniform reaction agent moving and spraying structure is installed on the recovery sedimentation tank;

[0004] The uniform reactant moving and scattering structure includes: a reaction chamber, a water inlet pipe, three drain pipes, two pairs of fixed blocks, two pairs of moving slide rods, a pair of sliding seats, a support frame, a pair of drive motors, a pair of drive gears, a pair of fixed racks, a storage tank, a material conveying switch valve, a pair of discharge pipes, a rotary motor, a rotary shaft, a scattering frame, and a sedimentation and discharge assembly.

[0005] The reaction chamber is located inside the recovery sedimentation tank. The inlet pipe is embedded in the front wall of the recovery sedimentation tank, and three drain pipes are embedded in the rear wall of the recovery sedimentation tank. Two pairs of fixed blocks are installed on the side walls of the recovery sedimentation tank, two pairs of movable slide rods are installed on the two pairs of fixed blocks, and a pair of sliding seats are movably installed on the two pairs of movable slide rods. The support frame is installed on a pair of sliding seats, a pair of drive motors are embedded in the side walls of the support frame, a pair of drive gears are installed on the output ends of the pair of drive motors, a pair of fixed racks are embedded in the upper wall of the recovery sedimentation tank, the storage tank is installed on the upper wall of the support frame, the material conveying switch valve is installed at the bottom discharge port of the storage tank, a pair of discharge pipes are installed on the material conveying switch valve and extend downward through the support frame, the rotary motor is installed in the middle of the upper wall of the support frame, the rotary shaft is movably embedded in the support frame and connected to the output end of the rotary motor, the spraying frame is installed at the lower end of the rotary shaft, and the sedimentation discharge assembly is installed on the front wall of the recovery sedimentation tank.

[0006] Preferably, the two pairs of fixing blocks are provided with reinforcing ribs.

[0007] Preferably, a pair of drive motors are mounted on the support frame by fixing bolts.

[0008] Preferably, a barrier filter screen is installed inside the reaction chamber.

[0009] Preferably, the storage box is mounted on a support frame by two pairs of support rods.

[0010] Preferably, the sedimentation discharge assembly includes: a discharge maintenance port, a pair of mounting rails, a barrier plate, and a pair of sealing rubber sleeves;

[0011] The discharge maintenance port is located on the front wall of the recycling sedimentation tank. A pair of mounting slide rails are installed on the front wall of the recycling sedimentation tank and located on both sides of the discharge maintenance port. A pair of sealing rubber sleeves are installed at both ends of the barrier sealing plate. The barrier sealing plate is installed on the pair of mounting slide rails through the pair of sealing rubber sleeves.

[0012] Beneficial effects

[0013] This invention provides a device for preparing leather tanning agents from chromium-containing wastewater, which has the following advantages: This solution uses a uniform reactant moving and spraying structure. A drive motor and gear rack drive the sliding seat to move laterally. Combined with the centrifugal force distribution of the rotating spraying frame, the reactant achieves three-dimensional uniform diffusion in the wastewater, ensuring uniform reactant delivery, guaranteeing reaction effect, and improving chromium ion precipitation efficiency. The moving and spraying structure achieves precise positioning through a pair of drive motors and a fixed rack, reducing the need for manual intervention and achieving fully automatic reagent delivery. An additional barrier filter prevents precipitates from mixing into the wastewater after reaction treatment. Furthermore, a sedimentation and discharge structure, along with external rinsing equipment, directly cleans the precipitates after reaction treatment, ensuring equipment cleanliness and facilitating cleaning and maintenance. This solves the problem that existing wastewater treatment methods often involve manually adding reactants directly into chromium-containing wastewater for reaction and precipitation, but these often use fixed feeding methods, resulting in insufficient mixing of reactants and wastewater, affecting chromium ion precipitation efficiency and tanning agent quality. Additionally, the precipitates settle directly at the bottom of the reaction tank, making cleaning and maintenance inconvenient. The lack of an integrated moving and spraying and sedimentation and discharge system increases operational complexity and energy consumption. Attached Figure Description

[0014] Figure 1 This is a front-view perspective three-dimensional structural diagram of the apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to the present invention.

[0015] Figure 2 This is a rear-view three-dimensional structural diagram of the apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to the present invention.

[0016] Figure 3 This is a bottom-view perspective three-dimensional structural diagram of the support frame of the apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to the present invention.

[0017] Figure 4 This is a three-dimensional structural diagram of the barrier sealing plate of the apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to the present invention.

[0018] Figure 5 This is a front view schematic diagram of the apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to the present invention.

[0019] In the diagram: 1-Equipment base; 2-Recovery sedimentation tank; 3-Reaction chamber; 4-Inlet pipe; 5-Drain pipe; 6-Fixing block; 7-Moving slide bar; 8-Sliding seat; 9-Support frame; 10-Drive motor; 11-Drive gear; 12-Fixing rack; 13-Storage box; 14-Material conveying switch valve; 15-Discharge pipe; 16-Rotating motor; 17-Rotating shaft; 18-Spraying frame; 19-Reinforcing rib; 20-Fixing bolt; 21-Barrier filter screen; 22-Support rod; 23-Discharge maintenance port; 24-Mounting slide rail; 25-Barrier sealing plate; 26-Sealing rubber sleeve. Detailed Implementation

[0020] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Example: Please refer to Figure 1-5 This utility model provides a technical solution: an apparatus for preparing leather tanning agent by recovering chromium-containing wastewater. This solution takes into account that the existing fixed reaction agent dosing equipment can only do so at fixed points when treating chromium-containing wastewater, and the reaction agent accumulates in one place, affecting the reaction treatment efficiency. In addition, the reaction agent and wastewater are not mixed evenly, affecting the sedimentation efficiency and treatment effect. Based on the above, this invention sets up the following technical means.

[0022] Specifically, this device includes at least: equipment base 1, recovery sedimentation tank 2, reaction chamber 3, water inlet pipe 4, three drain pipes 5, two pairs of fixed blocks 6, two pairs of movable slide rods 7, a pair of sliding seats 8, support frame 9, a pair of drive motors 10, a pair of drive gears 11, a pair of fixed racks 12, storage tank 13, material conveying switch valve 14, a pair of discharge pipes 15, rotary motor 16, rotary shaft 17, throwing frame 18, and sedimentation discharge assembly;

[0023] The sedimentation discharge assembly includes: a discharge maintenance port 23, a pair of mounting rails 24, a barrier plate 25, and a pair of sealing rubber sleeves 26;

[0024] The equipment base 1 provides a stable support platform for the entire device. A recovery sedimentation tank 2 is installed on it, forming the main frame of the equipment. The chromium-containing wastewater to be treated is injected into the reaction chamber 3 inside the recovery sedimentation tank 2 through the inlet pipe 4. The reaction chamber serves as the core area for mixing the wastewater and reactants. Reactants such as alkali and reducing agents are pre-stored in a storage tank 13, which is fixed to the support frame 9 by two pairs of support rods 22 to ensure stability. After the wastewater injection is complete, the control system activates the material conveying valve 14, discharging the reactants downwards through a pair of discharge pipes 15 according to a preset ratio. Simultaneously with the addition of the reactants, the rotary motor 16 starts, driving the rotary shaft 17 to rotate at high speed. The sprayer 18 at the end of the rotary shaft rotates accordingly, evenly dispersing the falling reactants through centrifugal force, creating an atomized dispersion effect and significantly increasing the contact area between the reactants and the wastewater. To enhance mixing uniformity, a pair of drive motors 10 installed on the support frame 9 start synchronously. The drive gear 11 at the output end of the drive motor meshes with the fixed rack 12 fixed on the recovery sedimentation tank. The rotating motor 10 drives the entire support frame to reciprocate along the movable slide bar 7. The movable slide bar is reinforced by the fixed block 6 and is equipped with reinforcing ribs 19 to improve structural strength. The drive motor 10 causes the spraying frame 18 to move back and forth along the wastewater surface, covering the entire reaction chamber 3. The rotating spraying frame 18 causes the reactant to diffuse radially, ensuring that the upper and lower layers of wastewater can react fully. After the reaction is completed, sediment is formed in the wastewater. The upper layer of clear water is discharged through the drain pipe 5 and enters the subsequent recycling process. During the drainage process, the barrier filter 21 filters and blocks the reaction sediment. After the wastewater is discharged, the sediment adheres to the bottom of the reaction chamber. The operator opens the discharge maintenance port 23 by lifting the barrier sealing plate 25. The barrier sealing plate is equipped with sealing rubber sleeves 26 at both ends to ensure no leakage when closed. The sliding rail design allows it to slide up and down easily. External flushing equipment, such as a high-pressure water gun, thoroughly flushes the reaction chamber through the discharge maintenance port, collecting and discharging the sediment to ensure the cleanliness of the equipment interior for the next use. This ensures the cleanliness of the equipment and facilitates cleaning and maintenance.

[0025] More specifically, the reaction chamber 3 is located inside the recovery sedimentation tank 2; the inlet pipe 4 is embedded in the front wall of the recovery sedimentation tank 2; three drain pipes 5 are embedded in the rear wall of the recovery sedimentation tank 2; two pairs of fixed blocks 6 are installed on the side walls of the recovery sedimentation tank 2; two pairs of movable slide rods 7 are installed on the two pairs of fixed blocks 6; a pair of sliding seats 8 are movably installed on the two pairs of movable slide rods 7; a support frame 9 is installed on the pair of sliding seats 8; a pair of drive motors 10 are embedded in the side walls of the support frame 9; and a pair of drive gears 11 are installed on the output ends of the pair of drive motors 10. The fixed rack 12 is embedded in the upper wall of the recycling sedimentation tank 2, the storage tank 13 is installed on the upper wall of the support frame 9, the conveying switch valve 14 is installed on the bottom discharge port of the storage tank 13, a pair of discharge pipes 15 are installed on the conveying switch valve 14 and their lower ends extend downward through the support frame 9, the rotary motor 16 is installed in the middle of the upper wall of the support frame 9, the rotating shaft 17 is movably embedded in the support frame 9 and connected to the output end of the rotary motor 16, the throwing frame 18 is installed at the lower end of the rotating shaft 17, and the sedimentation discharge assembly is installed on the front wall of the recycling sedimentation tank 2.

[0026] The discharge maintenance port 23 is opened on the front wall of the recycling sedimentation tank 2. A pair of mounting slide rails 24 are installed on the front wall of the recycling sedimentation tank 2 and located on both sides of the discharge maintenance port 23. A pair of sealing rubber sleeves 26 are set at both ends of the barrier sealing plate 25. The barrier sealing plate 25 is installed on the pair of mounting slide rails 24 through the pair of sealing rubber sleeves 26.

[0027] In the specific implementation process, furthermore, reinforcing ribs 19 are provided on the two pairs of fixing blocks 6.

[0028] In the specific implementation process, a pair of drive motors 10 are further mounted on the support frame 9 by fixing bolts 20.

[0029] In the specific implementation process, a barrier filter 21 is further installed inside the reaction chamber 3.

[0030] In the specific implementation process, the storage box 13 is further mounted on the support frame 9 by two pairs of support rods 22.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An apparatus for preparing leather tanning agents by recovering chromium-containing wastewater, comprising: The equipment base (1) and the recovery sedimentation tank (2) are characterized in that the recovery sedimentation tank (2) is installed on the equipment base (1) and a uniform reaction agent moving and spraying structure is installed on the recovery sedimentation tank (2); The uniform reactant moving and spraying structure includes: a reaction chamber (3), a water inlet pipe (4), three drain pipes (5), two pairs of fixed blocks (6), two pairs of moving slide rods (7), a pair of sliding seats (8), a support frame (9), a pair of drive motors (10), a pair of drive gears (11), a pair of fixed racks (12), a storage tank (13), a material conveying switch valve (14), a pair of discharge pipes (15), a rotary motor (16), a rotating shaft (17), a spraying frame (18), and a sedimentation and discharge assembly; The reaction chamber (3) is located inside the recovery sedimentation tank (2). The inlet pipe (4) is embedded in the front wall of the recovery sedimentation tank (2). Three drain pipes (5) are embedded in the rear wall of the recovery sedimentation tank (2). Two pairs of fixed blocks (6) are installed on the side walls of the recovery sedimentation tank (2). Two pairs of movable slide rods (7) are installed on the two pairs of fixed blocks (6). A pair of sliding seats (8) are movably installed on the two pairs of movable slide rods (7). The support frame (9) is installed on a pair of sliding seats (8). A pair of drive motors (10) are embedded in the side walls of the support frame (9). A pair of drive gears (11) are installed on the output end of a pair of drive motors (10). A fixed rack (12) is embedded in the upper wall of the recycling sedimentation tank (2), a storage tank (13) is installed on the upper wall of the support frame (9), a material conveying switch valve (14) is installed at the bottom discharge port of the storage tank (13), a pair of discharge pipes (15) are installed on the material conveying switch valve (14) and their lower ends extend downward through the support frame (9), a rotary motor (16) is installed in the middle of the upper wall of the support frame (9), a rotating shaft (17) is movably embedded in the support frame (9) and connected to the output end of the rotary motor (16), a spraying frame (18) is installed at the lower end of the rotating shaft (17), and a sedimentation discharge assembly is installed on the front wall of the recycling sedimentation tank (2).

2. The apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to claim 1, characterized in that, Reinforcing ribs (19) are provided on the two pairs of fixing blocks (6).

3. The apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to claim 1, characterized in that, A pair of drive motors (10) are mounted on the support frame (9) by fixing bolts (20).

4. The apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to claim 1, characterized in that, The reaction chamber (3) is equipped with a barrier filter (21).

5. The apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to claim 1, characterized in that, The storage box (13) is mounted on the support frame (9) by two pairs of support rods (22).

6. The apparatus for preparing leather tanning agents by recovering chromium-containing wastewater according to claim 1, characterized in that, The sedimentation discharge assembly includes: a discharge maintenance port (23), a pair of mounting rails (24), a barrier plate (25), and a pair of sealing rubber sleeves (26); The discharge maintenance port (23) is opened on the front wall of the recycling sedimentation tank (2). A pair of mounting slide rails (24) are installed on the front wall of the recycling sedimentation tank (2) and located on both sides of the discharge maintenance port (23). A pair of sealing rubber sleeves (26) are set at both ends of the barrier sealing plate (25). The barrier sealing plate (25) is installed on the pair of mounting slide rails (24) through the pair of sealing rubber sleeves (26).

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