Precipitation reaction kettle based on DCS automatic control and precipitate recovery system

Abstract

The utility model discloses a precipitation reaction kettle and precipitate recovery system based on DCS (Distributed Control System) automatic control, which comprises a precipitation reaction kettle, a delivery pump, a first precipitation tank, a second precipitation tank, a filter bag type centrifuge, a resin absorption tower, a flocculant tank and a central control computer, the precipitation reaction kettle, the filter bag type centrifuge, the delivery pump and the resin absorption tower are sequentially communicated through pipelines; an inlet of the precipitation reaction kettle is communicated with a strong alkali liquor conveying pipe and a desalted water conveying pipe, and a material basket for feeding is arranged above the precipitation reaction kettle; an outlet of the resin absorption tower and an outlet of the flocculant tank are both arranged in a first sedimentation tank, a Y-shaped filter is arranged between the first sedimentation tank and a second sedimentation tank, and a liquid level meter and a wastewater treatment device are arranged in the second sedimentation tank; the central control computer is electrically connected with the device; according to the device, metal components in reaction liquid are completely separated, so that the metal components cannot exist in the reaction liquid, waste is avoided, meanwhile, the device is completely automatic, and manpower and material resources are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical precipitation reaction and recovery, in particular to a precipitation reactor and a precipitation recovery system based on DCS automatic control. Background Art

[0002] Precipitation reaction is a common operation in the chemical production process. However, in the current production of most catalyst products, most precipitation reaction processes have a low degree of automation. Therefore, in order to improve the performance of the precipitation reactor and the sediment recovery system, an automated precipitation device is needed.

[0003] In the prior art, the invention disclosure patent with patent number CN202211373390.8 discloses a chemical wastewater heavy metal recovery device, which belongs to the technical field of sewage treatment equipment; it includes a base, a filtering mechanism and a sedimentation mechanism; the filtering mechanism includes an inner cylinder, a through groove is provided below the inner cylinder, and a filtering assembly is provided on the outer ring of the through groove, and the filtering assembly is connected to the liquid outlet pipe; the sedimentation mechanism includes a reaction barrel, the reaction barrel is fixedly mounted on a support seat, the support seat is mounted on the base, a disc is coaxially provided below the reaction barrel, the disc is mounted on the support seat, a movable plate is provided between the disc and the lower end of the reaction barrel, and the movable plate is slidably mounted on the support seat. This chemical wastewater heavy metal recovery device completes the recovery of heavy metals in chemical wastewater through a filtering mechanism and a sedimentation mechanism. During the recovery process, the recovered heavy metal solids can be separated from water. It has a simple structure and is easy to operate.

[0004] The above patent describes a chemical wastewater heavy metal recovery device, which filters out metal solids in wastewater by setting up a filtering mechanism and a sedimentation mechanism to achieve metal recovery; however, in the chemical industry, the precipitate after the chemical reaction also contains a large amount of precious metal components. Although the metal solids can be separated by filtration, the metal components dissolved in the precipitate cannot be separated, resulting in insufficient recovery and still causing waste of metal resources; further improvement is needed. Utility Model Content

[0005] The purpose of the utility model is to provide a precipitation reactor and a precipitate recovery system based on DCS automatic control, aiming to improve the problem that after the existing chemical reaction is completed, the reaction liquid is filtered to recover the metal materials in the reaction liquid, but the metal components dissolved in the precipitate cannot be separated and recovered, resulting in insufficient metal recovery and waste of metal resources.

[0006] The utility model is implemented as follows: a precipitation reactor and sediment recovery system based on DCS automatic control, comprising a precipitation reactor, a delivery pump, a No. 1 sedimentation tank and a No. 2 sedimentation tank, and also comprising a filter bag centrifuge, a resin absorption tower, a flocculant tank and a central control computer; the precipitation reactor, the filter bag centrifuge, the delivery pump and the resin absorption tower are connected in sequence through pipelines; the inlet of the precipitation reactor is connected with a strong alkali solution delivery pipe and a desalted water delivery pipe, and a material basket for feeding is arranged above the precipitation reactor; the outlets of the resin absorption tower and the flocculant tank are both arranged in the No. 1 sedimentation tank, a Y-type filter is arranged between the No. 1 sedimentation tank and the No. 2 sedimentation tank, and a liquid level meter and a wastewater treatment device are arranged in the No. 2 sedimentation tank; the central control computer is electrically connected to the device.

[0007] Preferably, the precipitation reactor includes a stirring impeller alkali solution concentration analyzer, a monitoring frequency conversion controller and a heating coil; the stirring impeller is rotatably arranged at the bottom of the precipitation reactor; the alkali solution concentration analyzer is arranged on the side of the precipitation reactor, and the detection end is extended and arranged in the reactor; the monitoring frequency conversion controller is arranged at the bottom of the precipitation reactor; and the heating coil is arranged around the inner wall of the precipitation reactor.

[0008] Preferably, the precipitation reactor further comprises a rotating shaft, a stirring impeller is mounted on the bottom of the precipitation reactor for rotation via the rotating shaft, and the lower end of the rotating shaft passes through the bottom of the reactor and is connected to a motor.

[0009] Preferably, it further comprises a first electromagnetic flowmeter, and the desalted water delivery pipe is provided with the first electromagnetic flowmeter.

[0010] Preferably, it also includes an alkali liquid buffer tank, which includes a connecting pipe and a second electromagnetic flowmeter; the water inlet of the alkali liquid buffer tank is connected to the strong alkali liquid delivery pipe, and the water outlet is connected to the precipitation reactor through the connecting pipe, and the connecting pipe is provided with a second electromagnetic flowmeter.

[0011] Preferably, the machine further comprises a working platform, the working platform comprises a ladder, and the working platform is provided with a ladder; the alkali solution buffer tank is located on the working platform.

[0012] Preferably, a monorail crane is further included. The monorail crane is arranged above the precipitation reactor, and the material basket is transported to the precipitation reactor by the monorail crane.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model sets a filter bag centrifuge, a resin absorption tower and a flocculant tank, and performs layer-by-layer precipitation filtration by physical and chemical methods to completely separate the metal components in the reaction liquid, so that no metal components will exist in the reaction liquid, thereby avoiding waste. At the same time, the device is fully automated, saving manpower and material resources.

[0015] 2. The utility model is provided with a monorail crane, which makes it convenient to add materials into the precipitation reactor through the control of the central control computer, saving manpower and material resources, being easy to operate and having higher implementation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the assembly structure of the utility model;

[0017] Figure 2 It is a structural diagram of the precipitation reactor of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the alkali solution buffer tank of the utility model.

[0019] In the figure: 1. Precipitation reactor; 101. Motor; 102. Rotating shaft; 103. Agitating impeller; 104. Alkali solution concentration analyzer; 105. Monitoring frequency converter; 106. Heating coil; 2. Bag centrifuge; 3. Delivery pump; 4. Resin absorption tower; 5. Sedimentation tank No. 1; 6. Sedimentation tank No. 2; 7. Y-type filter; 8. Flocculant tank; 9. Stirring device; 10. Liquid level gauge; 11. Wastewater treatment device; 12. Strong alkali solution delivery pipe; 13. Desalted water delivery pipe; 14. First electromagnetic flowmeter; 15. Alkali solution buffer tank; 1501. Connecting pipe; 1502. Second electromagnetic flowmeter; 16. Working platform; 1601. Ladder; 17. Monorail crane; 18. Material basket; 19. Central control computer. DETAILED DESCRIPTION

[0020] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0021] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0022] Example 1

[0023] like Figure 1 and Figure 3 As shown, a precipitation reactor and sediment recovery system based on DCS automatic control includes a precipitation reactor 1, a delivery pump 3, a No. 1 sedimentation tank 5 and a No. 2 sedimentation tank 6, and also includes a filter bag centrifuge 2, a resin absorption tower 4, a flocculant tank 8 and a central control computer 19; the precipitation reactor 1, the filter bag centrifuge 2, the delivery pump 3 and the resin absorption tower 4 are connected in sequence through pipelines; the inlet of the precipitation reactor 1 is connected to a strong alkali solution delivery pipe 12 and a desalted water delivery pipe 13, and also includes a first electromagnetic flowmeter 14, and the desalted water delivery pipe 13 is provided with a first Electromagnetic flowmeter 14; it also includes an alkali solution buffer tank 15, the alkali solution buffer tank 15 includes a connecting pipe 1501 and a second electromagnetic flowmeter 1502; the water inlet of the alkali solution buffer tank 15 is connected to the strong alkali solution delivery pipe 12, and the water outlet is connected to the precipitation reactor 1 through the connecting pipe 1501, and the connecting pipe 1501 is provided with a second electromagnetic flowmeter 1502. It also includes a working platform 16, the working platform 16 includes a ladder 1601, and the working platform 16 is provided with a ladder 1601; the alkali solution buffer tank 15 is located on the working platform 16.

[0024] like Figure 1 and Figure 2 As shown, a material basket 18 for feeding is provided above the precipitation reactor 1, and a monorail crane 17 is also provided. A monorail crane 17 is provided above the precipitation reactor 1, and the material basket 18 is transported to the precipitation reactor 1 by the monorail crane 17. At the same time, a partition for placing the material basket 18 is provided in the reactor to prevent the material basket 18 from falling directly into the reactor. The partition has dense circular holes, which are convenient for pouring the material in the material basket 18 into the reactor; the outlets of the resin absorption tower 4 and the flocculant tank 8 are both provided in the No. 1 sedimentation tank 5, and a Y-type filter 7 is provided between the No. 1 sedimentation tank 5 and the No. 2 sedimentation tank 6. A liquid level meter 10 and a wastewater treatment device 11 are provided in the No. 2 sedimentation tank 6, and multiple sedimentation tanks can be added between the No. 1 sedimentation tank 5 and the No. 2 sedimentation tank 6 according to the filtration situation, so that more detailed filtration can be performed; the central control computer 19 is electrically connected to the device; the precipitation reactor The kettle 1 includes a stirring impeller 103, an alkali concentration analyzer 104, a monitoring frequency conversion controller 105 and a heating coil 106; the stirring impeller 103 is rotatably arranged at the bottom of the precipitation reactor 1, and the precipitation reactor 1 also includes a rotating shaft 102. The bottom of the precipitation reactor 1 is rotatably installed with the stirring impeller 103 through the rotating shaft 102, and the lower end of the rotating shaft 102 passes through the bottom of the reactor and is connected to the motor 101; the alkali concentration analyzer 104 is arranged on the side of the precipitation reactor 1, and the detection end is extended and arranged in the reactor; the monitoring frequency conversion controller 105 is arranged at the bottom of the precipitation reactor 1; the heating coil 106 is arranged around the inner wall of the precipitation reactor 1; the equipment or pipelines involved in alkali liquid transportation are all made of titanium or standard PPR materials, and corrosion-resistant tiles are installed in the multi-stage sedimentation tank. In addition to the corrosion-resistant effect, it is also more convenient to collect the sediment in the tank later.

[0025] Example 2

[0026] like Figure 1 and Figure 3 As shown, a precipitation reactor and sediment recovery system based on DCS automatic control includes a precipitation reactor 1, a delivery pump 3, a No. 1 sedimentation tank 5 and a No. 2 sedimentation tank 6, and also includes a filter bag centrifuge 2, a resin absorption tower 4, a flocculant tank 8 and a central control computer 19; the precipitation reactor 1, the filter bag centrifuge 2, the delivery pump 3 and the resin absorption tower 4 are connected in sequence through pipelines; the inlet of the precipitation reactor 1 is connected to a strong alkali solution delivery pipe 12 and a desalted water delivery pipe 13, and also includes a first electromagnetic flowmeter 14, and the desalted water delivery pipe 13 is provided with a first Electromagnetic flowmeter 14; it also includes an alkali solution buffer tank 15, the alkali solution buffer tank 15 includes a connecting pipe 1501 and a second electromagnetic flowmeter 1502; the water inlet of the alkali solution buffer tank 15 is connected to the strong alkali solution delivery pipe 12, and the water outlet is connected to the precipitation reactor 1 through the connecting pipe 1501, and the connecting pipe 1501 is provided with a second electromagnetic flowmeter 1502. It also includes a working platform 16, the working platform 16 includes a ladder 1601, and the working platform 16 is provided with a ladder 1601; the alkali solution buffer tank 15 is located on the working platform 16.

[0027] like Figure 1 and Figure 2 As shown, a material basket 18 for feeding is provided above the precipitation reactor 1, and a monorail crane 17 is also included. A monorail crane 17 is provided above the precipitation reactor 1, and the material basket 18 is transported to the precipitation reactor 1 by the monorail crane 17; the outlets of the resin absorption tower 4 and the flocculant tank 8 are both provided in the No. 1 sedimentation tank 5, a Y-type filter 7 is provided between the No. 1 sedimentation tank 5 and the No. 2 sedimentation tank 6, and a liquid level meter 10 and a wastewater treatment device 11 are provided in the No. 2 sedimentation tank 6; the central control computer 19 is electrically connected to the device; the precipitation reactor 1 includes a stirring impeller 103, an alkali solution concentration analyzer 104, a monitoring frequency conversion controller 105 and a heating coil 106; the stirring impeller 103 is rotated and provided at At the bottom of the precipitation reactor 1, the precipitation reactor 1 also includes a rotating shaft 102. The bottom of the precipitation reactor 1 is rotated by the rotating shaft 102 and is equipped with a stirring impeller 103. The lower end of the rotating shaft 102 passes through the bottom of the reactor and is connected to a motor 101; an alkali concentration analyzer 104 is arranged on the side of the precipitation reactor 1, and the detection end is extended and arranged in the reactor; a monitoring frequency conversion controller 105 is arranged at the bottom of the precipitation reactor 1; a heating coil 106 is arranged around the inner wall of the precipitation reactor 1, and the equipment or pipelines involved in the alkali liquid transportation are all made of titanium or standard PPR materials. Corrosion-resistant tiles are installed in the multi-stage sedimentation tank. In addition to the corrosion-resistant effect, it is also more convenient to collect the sediment in the tank later.

[0028] The working principle of the present invention is as follows: when the device is needed, the central control computer 19 controls the strong alkali solution delivery pipe 12 and the desalted water delivery pipe 13 to inject the solution into the precipitation reactor 1, and at the same time the alkali solution buffer tank 15 buffers the strong alkali solution. The first electromagnetic flowmeter 14 and the second electromagnetic flowmeter 1502 can display the flow in the pipeline, so that the operator can control the injection amount through the central control computer 19; then the material basket 18 is placed on the precipitation reactor 1 through the monorail crane, so that the material can be poured into the reactor conveniently. The analysis data of the alkali solution concentration analyzer 104 is displayed on the computer in real time, so that the central control operator can grasp the process data in time. The heating coil 106 can heat the inside of the reactor, and the stirring impeller can stir the inside of the reactor, which is convenient for centrifugal filtration, and all are connected with the central control computer. The central control computer is connected, and the computer is controlled in real time, so that the central control operator can timely operate the stirring frequency of the stirrer and the temperature control required by the process. After preliminary filtration by the centrifuge, most of the precipitate solids containing precious metals are filtered into the filter bag and collected manually; then the reaction liquid is centrifuged and filtered and then conveyed to the resin absorption tower 4 through the delivery pump 3 for treatment, and the precious metal components are adsorbed in the resin, and then conveyed to the No. 1 sedimentation tank 5 and the No. 2 sedimentation tank 6 for precipitation in turn, and flocculant is added to the No. 1 sedimentation tank 5 through the flocculant tank 8, and flocculation and precipitation are carried out after stirring by the stirring device 9, and the residual metal components are separated again, and then the remaining precipitate and sewage are separated by the No. 2 sedimentation tank, and the final sewage is treated and discharged through the wastewater treatment device 11.

[0029] In summary, the utility model sets a filter bag centrifuge 2, a resin absorption tower 4 and a flocculant tank 8, and performs layer-by-layer precipitation filtration by physical and chemical methods to completely separate the metal components in the reaction liquid, so that no metal components will exist in the reaction liquid, thereby avoiding waste. At the same time, the device is fully automated, saving manpower and material resources; by setting a monorail crane 17, it is convenient to add materials to the interior of the precipitation reactor 1 through the control of the central control computer 19, saving manpower and material resources, easy operation, and higher implementation efficiency.

[0030] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A precipitation reactor and sediment recovery system based on DCS automatic control, comprising a precipitation reactor (1), a delivery pump (3), a No. 1 sedimentation tank (5) and a No. 2 sedimentation tank (6), characterized in that: The invention also includes a filter bag centrifuge (2), a resin absorption tower (4), a flocculant tank (8) and a central control computer (19); the precipitation reactor (1), the filter bag centrifuge (2), the delivery pump (3) and the resin absorption tower (4) are sequentially connected through pipelines; the inlet of the precipitation reactor (1) is connected with a strong alkali solution delivery pipe (12) and a desalted water delivery pipe (13), and a material basket (18) for feeding is provided above the precipitation reactor (1); the outlets of the resin absorption tower (4) and the flocculant tank (8) are both provided in the No. 1 sedimentation tank (5), a Y-type filter (7) is provided between the No. 1 sedimentation tank (5) and the No. 2 sedimentation tank (6), and a liquid level meter (10) and a wastewater treatment device (11) are provided in the No. 2 sedimentation tank (6); the central control computer (19) is electrically connected to the device.

2. A precipitation reactor and precipitate recovery system based on DCS automatic control according to claim 1, characterized in that: The precipitation reactor (1) comprises a stirring impeller (103), an alkali solution concentration analyzer (104), a monitoring frequency conversion controller (105) and a heating coil (106); the stirring impeller (103) is rotatably arranged at the bottom of the precipitation reactor (1); the alkali solution concentration analyzer (104) is arranged on the side of the precipitation reactor (1), and the detection end is extended and arranged in the reactor; the monitoring frequency conversion controller (105) is arranged at the bottom of the precipitation reactor (1); and the heating coil (106) is arranged around the inner wall of the precipitation reactor (1).

3. A precipitation reactor and sediment recovery system based on DCS automatic control according to claim 2, characterized in that: The precipitation reactor (1) further comprises a rotating shaft (102), a stirring impeller (103) is rotatably mounted on the bottom of the precipitation reactor (1) via the rotating shaft (102), and a motor (101) is connected to the lower end of the rotating shaft (102) which passes through the bottom of the reactor.

4. A precipitation reactor and precipitate recovery system based on DCS automatic control according to claim 1, characterized in that: It also includes a first electromagnetic flowmeter (14), and the desalted water delivery pipe (13) is provided with the first electromagnetic flowmeter (14).

5. A precipitation reactor and sediment recovery system based on DCS automatic control according to claim 1, characterized in that: The invention also includes an alkali solution buffer tank (15), which includes a connecting pipe (1501) and a second electromagnetic flowmeter (1502); the water inlet of the alkali solution buffer tank (15) is connected to the strong alkali solution delivery pipe (12), and the water outlet is connected to the precipitation reaction kettle (1) through the connecting pipe (1501), and the connecting pipe (1501) is provided with the second electromagnetic flowmeter (1502).

6. A precipitation reactor and sediment recovery system based on DCS automatic control according to claim 5, characterized in that: The utility model also comprises a working platform (16), wherein the working platform (16) comprises a ladder (1601), and the ladder (1601) is arranged on the working platform (16); and the alkali solution buffer tank (15) is located on the working platform (16).

7. A precipitation reactor and sediment recovery system based on DCS automatic control according to claim 1, characterized in that: In addition, a monorail crane (17) is provided above the precipitation reactor (1), and the material basket (18) is transported to the precipitation reactor (1) via the monorail crane (17).

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