CN217449099U

CN217449099U - Ferric phosphate filter cake echelon washing system

Info

Publication number: CN217449099U
Application number: CN202220146656.4U
Authority: CN
Inventors: 肖益帆; 陈迎迎; 胡加文
Original assignee: Hubei Yunxiang Juneng New Energy Technology Co ltd
Current assignee: Hubei Yunxiang Juneng New Energy Technology Co ltd
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-09-20
Anticipated expiration: 2032-01-19

Abstract

The utility model relates to a ferric phosphate filter cake echelon washing system, including pressure filter, feeding unit, mother liquor unit, pure water unit, wash water tank unit, wash water discharge unit, the pressure filter includes PLC control system. The feeding unit comprises a feeding pipeline, one end of the feeding pipeline is connected with a feeding hole of the filter press, the mother liquid unit comprises a mother liquid discharge pipeline, the mother liquid discharge pipeline is connected with a water outlet of the filter press, the pure water unit comprises a pure water pipeline, one end of the pure water pipeline is connected with a water inlet of the filter press, one end of the washing tank unit is connected with the water inlet of the filter press, the other end of the washing tank unit is connected with the water outlet of the filter press, and the washing tank unit comprises a plurality of washing tank units connected in parallel. This ferric phosphate filter cake echelon washing system has practiced thrift the water resource greatly at the washing in-process.

Description

Ferric phosphate filter cake echelon washing system

Technical Field

The utility model belongs to the technical field of the iron phosphate filter cake washing technique and specifically relates to an iron phosphate filter cake echelon washing system is related to.

Background

With the rapid development of socioeconomic, the demand of human beings for energy is increasing. Compared with mechanical energy storage, electromagnetic energy storage and phase change energy storage, electrochemical energy storage has the characteristics of high efficiency, low cost, safety, convenience and the like, and develops into the current main energy storage technology. Among them, the lithium ion battery is one of the most important electrochemical energy storage devices, and has the characteristics of high working voltage, high energy density, no memory effect, small self-discharge, long cycle life, environmental friendliness and the like, so that the lithium ion battery is widely applied to a plurality of fields such as electric vehicles, energy storage, consumer electronics, military aerospace and the like.

Lithium iron phosphate is one of the most important lithium ion battery anode materials in the current lithium battery industry. Its advantages are high discharge capacity, excellent cyclic performance, low cost, no poison and no environmental pollution. The current mainstream production process of the lithium iron phosphate is to prepare the lithium iron phosphate by using anhydrous iron phosphate. In the preparation process of the anhydrous iron phosphate, slurry of the iron phosphate is synthesized, then a filter press is used for filtering to obtain an iron phosphate filter cake, and the iron phosphate filter cake is washed by pure water. When the iron phosphate filter cake is washed, the iron phosphate filter cake is usually washed directly through external pure water, the obtained washing water is directly discharged to a sewage station, the washing method does not recycle the washing water, the consumption of the pure water is too high, the washing water amount required to be treated correspondingly is also very high, and the production cost of the iron phosphate is higher.

Therefore, a ferric phosphate filter cake gradient washing system is needed to solve the technical problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a ferric phosphate filter cake echelon washing system to the technical problem who exists among the prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides an iron phosphate filter cake echelon washing system, includes pressure filter, feed unit, mother liquor unit, pure water unit, washes jar unit, washes water discharge unit, feed unit includes the charge-in pipeline, charge-in pipeline's one end with the feed inlet of pressure filter is connected, the mother liquor unit includes mother liquor discharge pipe, mother liquor discharge pipe with the delivery port of pressure filter links to each other, pure water unit includes pure water pipeline, pure water pipeline's one end with the water inlet of pressure filter is connected, wash the one end of jar unit with the water inlet of pressure filter is connected, wash the other end of jar unit with the delivery port of pressure filter links to each other, wash the jar unit and include a plurality of parallel connection's washing jar unit.

Preferably, in the iron phosphate filter cake echelon washing system, the washing water tank unit includes a washing water tank, a washing water tank inlet pipe is connected to an inlet of the washing water tank, and a washing water tank outlet pipe is connected to an outlet of the washing water tank.

Preferably, in the above iron phosphate filter cake echelon washing system, a water outlet pipe of the water washing tank is provided with a water washing tank hand valve, a water outlet pump of the water washing tank, and a water outlet valve of the water washing tank.

Preferably, in the iron phosphate filter cake echelon washing system, a water inlet valve of the water washing tank is mounted on a water inlet pipe of the water washing tank.

Preferably, in the iron phosphate filter cake echelon washing system, the washing water discharge unit includes a washing water discharge pipeline, and a washing water discharge valve is installed on the washing water discharge pipeline.

Preferably, in the iron phosphate filter cake echelon washing system, an online conductivity meter is installed at the water outlet of the filter press, and the online conductivity meter is suitable for monitoring the conductivity at the water outlet of the filter press in real time.

Preferably, in the above iron phosphate filter cake echelon washing system, a washing water return pipe is connected between the washing water tank unit and the water inlet of the filter press, and a washing water return valve is installed on the washing water return pipe.

Preferably, in the iron phosphate filter cake step washing system, a feed pump and a feed valve are installed on the feed pipeline.

Preferably, in the iron phosphate filter cake echelon washing system, a mother liquor discharge valve is installed on the mother liquor discharge pipeline.

The utility model has the advantages that: this patent is through setting up pressure filter, feed unit, mother liquor unit, pure water unit, washing jar unit, washing water discharge unit to set up a plurality of parallel connection's washing jar unit in washing jar unit, through the circulation washing of each washing jar unit, utilize the principle of washing against the current, will wash hierarchical echelon retrieval and utilization of water, and then make the water consumption greatly reduced among the washing process, reach the purpose of using water wisely.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a filter press, 21, a feed pump, 22, a feed valve, 23, a feed pipeline, 31, a mother liquor discharge valve, 32, a mother liquor discharge pipeline, 41, a pure water pipeline, 42, a pure water inlet valve, 5, a primary wash tank, 51, a primary wash tank inlet valve, 52, a primary wash tank inlet pipe, 53, a primary wash tank hand valve, 54, a primary wash tank outlet pump, 55, a primary wash tank outlet valve, 56, a primary wash tank outlet pipe, 6, a secondary wash tank, 61, a secondary wash tank inlet valve, 62, a secondary wash tank inlet pipe, 63, a secondary wash tank hand valve, 64, a secondary wash tank outlet pump, 65, a secondary wash tank outlet valve, 66, a secondary wash tank outlet pipe, 7, a tertiary wash tank, 71, a tertiary wash tank, 72, a tertiary wash tank inlet pipe, 73, a tertiary wash tank hand valve, 74, a tertiary wash tank outlet pump, 75, and a tertiary wash tank outlet valve, 76. the device comprises a third washing water tank water outlet pipe, 8, a fourth washing water tank, 81, a fourth washing water tank water inlet valve, 82, a fourth washing water tank water inlet pipe, 83, a fourth washing water tank hand valve, 84, a fourth washing water tank water outlet pump, 85, a fourth washing water tank water outlet valve, 86, a fourth washing water tank water outlet pipe, 91, a washing water return valve, 92, a washing water return pipeline, 101, a washing water discharge valve, 102, a washing water discharge pipeline and 11, and an online conductivity meter.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the iron phosphate filter cake echelon washing system comprises a filter press 1, a feeding unit, a mother liquor unit, a pure water unit, a washing water tank unit and a washing water discharging unit. An online conductivity meter 11 is installed at the water outlet of the filter press 1 and used for monitoring the conductivity of the water outlet of the filter press 1 in real time. The filter press 1 comprises a PLC control system.

The feeding unit comprises a feeding pipeline 23, and a feeding pump 21 and a feeding valve 22 are installed on the feeding pipeline 23. One end of the feed pipe 23 is connected to the feed opening of the filter press 1. The feed line 23 is used to feed the material containing iron phosphate into the filter press 1.

The mother liquor unit comprises a mother liquor discharge pipeline 32, a mother liquor discharge valve 31 is installed on the mother liquor discharge pipeline 32, and the mother liquor discharge pipeline 32 is connected with a water outlet of the filter press 1. After the material is conveyed into the filter press 1, a filter cake and mother liquor are obtained after filtration, and the mother liquor is discharged into a mother liquor storage tank through a mother liquor discharge pipeline 32.

The pure water unit comprises a pure water pipeline 41, a pure water inlet valve 42 is arranged on the pure water pipeline 41, one end of the pure water pipeline 41 is connected with the water inlet of the filter press 1, and the other end of the pure water pipeline is connected with a pure water constant-pressure water supply system.

One end of the washing water tank unit is connected with the water inlet of the filter press 1, and the other end is connected with a washing water return pipe 92 which is connected with the water inlet of the filter press 1 through the washing water return pipe 92. A washing water return valve 91 is installed on the washing water return pipe 92. The washing water tank unit comprises four washing water tank units which are connected in parallel and are respectively a primary washing water tank unit, a secondary washing water tank unit, a tertiary washing water tank unit and a quaternary washing water tank unit. The washing water tank unit comprises a washing water tank, a washing water tank water inlet pipe is connected to the inlet of the washing water tank, a washing water tank water outlet pipe is connected to the outlet of the washing water tank, a washing water tank hand valve, a washing water tank water outlet pump and a washing water tank water outlet valve are mounted on the washing water tank water outlet pipe, and a washing water tank water inlet valve is mounted on the washing water tank water inlet pipe.

As shown in fig. 1, the primary wash water tank unit includes a primary wash water tank 5, a primary wash water tank inlet valve 51, a primary wash water tank inlet pipe 52, a primary wash water tank hand valve 53, a primary wash water tank outlet pump 54, a primary wash water tank outlet valve 55, and a primary wash water tank outlet pipe 56; the secondary washing water tank unit comprises a secondary washing water tank 6, a secondary washing water tank inlet valve 61, a secondary washing water tank inlet pipe 62, a secondary washing water tank hand valve 63, a secondary washing water tank outlet pump 64, a secondary washing water tank outlet valve 65 and a secondary washing water tank outlet pipe 66; the third washing water tank unit comprises a third washing water tank 7, a third washing water tank inlet valve 71, a third washing water tank inlet pipe 72, a third washing water tank hand valve 73, a third washing water tank outlet pump 74, a third washing water tank outlet valve 75 and a third washing water tank outlet pipe 76; the four-time washing water tank unit comprises a four-time washing water tank 8, a water inlet valve 81 of the four-time washing water tank, a water inlet pipe 82 of the four-time washing water tank, a hand valve 83 of the four-time washing water tank, a water outlet pump 84 of the four-time washing water tank, a water outlet valve 85 of the four-time washing water tank and a water outlet pipe 86 of the four-time washing water tank.

The washing water discharge unit comprises a washing water discharge pipeline 102, one end of the washing water discharge pipeline 102 is connected with a water outlet of the filter press 1, and the other end of the washing water discharge pipeline is communicated with a sewage station. A wash water discharge valve 101 is installed on the wash water discharge pipe 102.

The operation process comprises the following steps: firstly, feeding, opening a feeding pump 21 and a feeding valve 22, feeding materials into the filter press 1 through a feeding pipeline 23, filtering to obtain a filter cake and mother liquor, simultaneously opening a mother liquor discharge valve 31, normally opening hand valves (including all hand valves in the system, such as a primary water washing tank hand valve 53, a secondary water washing tank hand valve 63, a tertiary water washing tank hand valve 73 and a quaternary water washing tank hand valve 83), closing other pump valves not mentioned, and discharging the mother liquor into a mother liquor storage tank through a mother liquor discharge pipeline 32. Then, the washing stage is carried out, the feeding pump 21, the feeding valve 22 and the mother liquor discharge valve 31 are all closed, the water outlet pump 84 of the fourth-time washing tank, the water outlet valve 85 of the fourth-time washing tank, the washing water return valve 91 and the washing water discharge valve 101 are opened, the hand valve is normally opened, and other pump valves which are not mentioned are all closed; the washing water of the fourth time enters a filter press to carry out first washing on the filter cake, and the obtained washing water of the fifth time is discharged into a sewage station through a washing water discharge pipeline 102; after washing for 10min, closing a water outlet pump 84 of the fourth washing tank, a water outlet valve 85 of the fourth washing tank and a washing water discharge valve 101, opening a water outlet pump 74 of the third washing tank, a water outlet valve 75 of the third washing tank, a water inlet valve 81 of the fourth washing tank and a washing water return valve 91 (the hand valves are normally open, and other pump valves are not mentioned to be closed), and allowing the third washing water to enter a filter press for carrying out second washing on a filter cake to obtain fourth washing water which enters the fourth washing tank 8 through a water inlet pipe 82 of the fourth washing tank; after washing for 10min, closing a water outlet pump 74 of the third washing tank, a water outlet valve 75 of the third washing tank and a water inlet valve 81 of the fourth washing tank, opening a water outlet pump 64 of the second washing tank, a water outlet valve 65 of the second washing tank, a water inlet valve 71 of the third washing tank and a water return valve 91 of the washing water (the hand valves are normally open, and other pump valves are not mentioned to be closed), and allowing the second washing water to enter the filter press 1 to wash the filter cake for the third time to obtain third washing water which enters the third washing tank 7 through a water inlet pipe 72 of the third washing tank; after washing for 10min, closing a secondary washing water tank outlet pump 64, a secondary washing water tank outlet valve 65 and a secondary washing water tank inlet valve 71, opening a primary washing water tank outlet pump 54, a primary washing water tank outlet valve 55, a secondary washing water tank inlet valve 61 and a washing water return valve 91 (hand valves are normally open, and other pump valves not mentioned are all closed), feeding the primary washing water into the filter press 1 to wash the filter cake for the fourth time, and feeding the obtained secondary washing water into the secondary washing water tank 6 through a secondary washing water tank inlet pipe 62; after washing for 10min, closing a primary washing tank water outlet pump 54, a primary washing tank water outlet valve 55 and a secondary washing tank water inlet valve 61, opening a pure water inlet valve 42 and a primary washing tank water inlet valve 51 (the hand valves are normally open, and other pump valves are not mentioned to be closed), enabling pure water to enter the filter press 1 to wash a filter cake for the fifth time, enabling primary washing water to enter the primary washing tank 5 through a primary washing tank water inlet pipe 52, and after washing for 10min, reading the indication number of the online conductivity meter 11, wherein the result is the washing end point conductivity; then all pump valves are closed (the hand valves are normally opened), the filter cake washing process is completed, and then the filter press 1 starts to unload the filter cake; the total washing time was 50 min.

What this patent needs to explain is that, hand valve normally opens, and its effect is the maintenance of the convenient pump of changing. And after the washing water is discharged into the sewage station for five times, carrying out sewage treatment in the sewage station to obtain pure water, and returning to the pure water constant-pressure water supply system again.

Furthermore, if the wash endpoint conductivity is not acceptable, the time for each wash can be adjusted: if the conductivity is higher, the washing time is prolonged until the conductivity is qualified; if the conductivity is lower, the washing time can be reduced, and excessive washing can be avoided, so that the water consumption is reduced; the pressure of the washing water recycling is the same as the pressure of constant-pressure water supply, and the time of each washing is the same, so that the water consumption of each washing is ensured to be the same, and the water consumption of 4 washing water tanks is balanced; in the actual use process, the washing times can be adjusted according to needs, and only corresponding washing water tank units need to be increased or decreased; owing to install online conductivity meter, the utility model discloses still can change control mode, by controlling washing time change each time and changing the washing water conductivity of control washing each time, reach predetermined conductivity in this washing procedure after washing each time promptly until.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The utility model provides an iron phosphate filter cake echelon washing system which characterized in that: the device comprises a filter press (1), a feeding unit, a mother liquid unit, a pure water unit, a washing tank unit and a washing water discharge unit, wherein the feeding unit comprises a feeding pipeline (23), one end of the feeding pipeline (23) is connected with a feeding hole of the filter press (1), the mother liquid unit comprises a mother liquid discharge pipeline (32), the mother liquid discharge pipeline (32) is connected with a water outlet of the filter press (1), the pure water unit comprises a pure water pipeline (41), one end of the pure water pipeline (41) is connected with a water inlet of the filter press (1), one end of the washing tank unit is connected with the water inlet of the filter press (1), the other end of the washing tank unit is connected with the water outlet of the filter press (1), and the washing tank unit comprises a plurality of washing water tank units connected in parallel.

2. The iron phosphate filter cake echelon washing system of claim 1, characterized in that: the washing water tank unit comprises a washing water tank, a washing water tank water inlet pipe is connected to the inlet of the washing water tank, and a washing water tank water outlet pipe is connected to the outlet of the washing water tank.

3. The iron phosphate filter cake echelon washing system of claim 2, characterized in that: and a water outlet pipe of the water washing tank is provided with a water washing tank hand valve, a water outlet pump of the water washing tank and a water outlet valve of the water washing tank.

4. The iron phosphate filter cake echelon washing system of claim 2, characterized in that: and a water inlet valve of the washing water tank is arranged on the water inlet pipe of the washing water tank.

5. The iron phosphate filter cake echelon washing system of claim 1, characterized in that: the washing water discharge unit comprises a washing water discharge pipeline (102), and a washing water discharge valve (101) is installed on the washing water discharge pipeline (102).

6. The iron phosphate filter cake echelon washing system of claim 1, characterized in that: an online conductivity meter (11) is arranged at the water outlet of the filter press (1) and is suitable for monitoring the conductivity of the water outlet of the filter press (1) in real time.

7. The iron phosphate filter cake echelon washing system of claim 1, characterized in that: a washing water return pipe (92) is connected between the washing water tank unit and the water inlet of the filter press (1), and a washing water return valve (91) is installed on the washing water return pipe (92).

8. The iron phosphate filter cake echelon washing system of claim 1, characterized in that: and a feeding pump (21) and a feeding valve (22) are arranged on the feeding pipeline (23).

9. The iron phosphate filter cake echelon washing system of claim 1, characterized in that: and a mother liquid discharge valve (31) is arranged on the mother liquid discharge pipeline (32).