Automation equipment for treating waste alkali liquor activated by nickel screen of electrolytic cell

Abstract

The utility model belongs to the technical field of green hydrogen production, and particularly relates to waste liquid treatment equipment. The utility model relates to automatic equipment for treating waste alkali liquor activated by a nickel screen of an electrolytic bath. The automatic equipment comprises a waste acid liquor impurity filtering tank; a waste alkali liquid impurity filtering tank; the acid-base neutralization reaction tank is respectively communicated with output pipelines of the waste acid liquid impurity filtering tank and the waste alkali liquid impurity filtering tank; a stirrer is arranged in the acid-base neutralization reaction tank; the first-stage coarse filtering tank I and the first-stage coarse filtering tank II are respectively communicated with an output pipeline of the acid-base neutralization reaction tank; the second-stage fine filtering tank is respectively communicated with output pipelines of the first-stage coarse filtering tank I and the first-stage coarse filtering tank II; the filtrate storage tank is communicated with an output pipeline of the secondary fine filtering tank; and the control panel is used for conveying the output pipelines and controlling the stirrer. The device can realize automatic treatment of the activated waste alkali liquor, is convenient for batch treatment of the activated waste alkali liquor in the electrolytic bath, and reduces the treatment cost of the activated waste alkali liquor, thereby improving the economical efficiency and practicability of hydrogen.

Description

TECHNICAL FIELD

[0001] The utility model belongs to green hydrogen production technical field, concretely relates to a waste liquid treatment equipment. BACKGROUND

[0002] In the process of realizing the double-carbon target of "carbon peak" and "carbon neutralization" in China, moving towards low carbon and clean is an inevitable trend to promote energy transformation. Hydrogen energy is abundant in source, widely used, green, clean and low carbon, and is one of the important carriers of energy transformation development recognized by the industry, which has a positive supporting role for realizing the "carbon peak" and "carbon neutralization" target. Among them, "green hydrogen" is the key to realize the net zero emission path, so it has become an important way to reduce carbon and decarbonize. The alkaline water electrolysis hydrogen production equipment plays an important role in the green hydrogen production process due to its mature technology, low cost and other characteristics.

[0003] The alkaline water electrolysis hydrogen production device is composed of an electrolytic tank and an auxiliary system. The core components of the alkaline electrolytic tank mainly include a polar plate, a sprayed nickel mesh, a diaphragm cloth, a gasket and a fastener, etc. The sprayed nickel mesh is one of the most critical core components of the alkaline electrolytic tank, which directly affects the electrolysis efficiency of the electrolytic tank and plays a decisive role in the performance, service life and cost of the electrolytic tank. The sprayed nickel mesh is obtained by mixing nickel powder and aluminum powder in a certain proportion and then hot spraying on the nickel mesh. Activation treatment is required before use. The activation liquid cannot be reused after a period of use, producing activated waste alkali liquid, which increases the production and operation cost of hydrogen energy to some extent.

[0004] With the rapid development of hydrogen energy, the gas production and volume of single electrolytic tank are increasing, which leads to the increase of the number of small chambers and the diameter of nickel mesh, and the amount of activated waste liquid also increases. The traditional form of nickel mesh activation waste liquid treatment by entrusting professional treatment units is no longer applicable due to high price. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving the problem of the existing batch activation waste alkali liquid production, and provides an automatic equipment for treating the activated waste alkali liquid of the electrolytic tank nickel mesh.

[0006] The technical scheme of the utility model is an automatic equipment for treating the activated waste alkali liquid of the electrolytic tank nickel mesh, which comprises:

[0007] A waste acid liquid impurity filtering tank is arranged to filter the impurities in the waste acid liquid.

[0008] A waste alkali liquid impurity filtering tank is arranged to filter the impurities in the waste alkali liquid.

[0009] An acid-alkali neutralization reaction tank is in communication with the output pipelines of the waste acid liquid impurity filtering tank and the waste alkali liquid impurity filtering tank, respectively; and a stirrer is arranged in the acid-alkali neutralization reaction tank.

[0010] A first-stage rough filter tank I and a first-stage rough filter tank II are respectively communicated with the output pipeline of the acid-base neutralization reaction tank.

[0011] A second-stage fine filter tank is communicated with the output pipeline of the first-stage rough filter tank I and the first-stage rough filter tank II.

[0012] A filtrate storage tank is communicated with the output pipeline of the second-stage fine filter tank.

[0013] A control panel controls the delivery of each output pipeline and the stirrer.

[0014] In the above scheme, specifically:

[0015] A filter element I is arranged in the waste acid liquid impurity filter tank to divide the waste acid liquid impurity filter tank into a waste acid liquid filtering chamber and a storage chamber. The waste acid liquid is filtered to remove impurities under the action of the filter element I, and the activated waste acid liquid with impurities removed enters the storage chamber of the waste acid liquid impurity filter tank. A delivery pump I is arranged on the output pipeline of the waste acid liquid impurity filter tank.

[0016] A filter element II is arranged in the waste alkali liquid impurity filter tank to divide the waste alkali liquid impurity filter tank into a waste alkali liquid filtering chamber and a storage chamber. The activated waste alkali liquid is filtered to remove impurities under the action of the filter element II, and the activated waste alkali liquid with impurities removed enters the storage chamber of the waste alkali liquid impurity filter tank. A delivery pump II is arranged on the output pipeline of the waste alkali liquid impurity filter tank.

[0017] The stirrer is located in the middle of the acid-base neutralization reaction tank and has three blades distributed in the horizontal direction. The stirrer is driven by a stirring motor. The activated waste alkali liquid and waste acid liquid with impurities removed enter the acid-base neutralization reaction tank under the action of the delivery pump I and the delivery pump II, and the waste acid-base liquid is fully mixed and reacts under the action of the stirrer. A delivery pump III is arranged on the output pipeline of the acid-base neutralization reaction tank.

[0018] To increase the filtering capacity of the rough filter tank, two rough filter tanks are arranged, i.e., a first-stage rough filter tank I and a first-stage rough filter tank II. A filter element III is arranged in the first-stage rough filter tank I to divide the first-stage rough filter tank I into a filtering chamber and a storage chamber. A filter element V is arranged in the first-stage rough filter tank II to divide the first-stage rough filter tank II into a filtering chamber and a storage chamber. A vacuum extraction device is connected to the storage chambers of the first-stage rough filter tank I and the first-stage rough filter tank II through a vacuum extraction pipeline. The acid-base neutralization liquid is delivered to the filtering chambers of the first-stage rough filter tank I and the first-stage rough filter tank II through a connecting pipeline and the delivery pump III. The vacuum extraction device sets the upper part of the filter element III and the filter element V to normal pressure and the lower part to vacuum through the vacuum extraction pipeline. The neutralization liquid forms a driving force due to the pressure difference between the upper and lower streams to realize solid-liquid separation. The neutralization liquid enters the storage chambers of the first-stage rough filter tank I and the first-stage rough filter tank II through the filter element III and the filter element V under the pressure difference between the upper and lower streams. A delivery pump IV is arranged on the output pipeline of the first-stage rough filter tank I and the first-stage rough filter tank II.

[0019] The secondary fine filtering tank is provided with a filtering element IV; the coarse filtering liquid is filtered again by the filtering element IV to enter the storage cavity of the secondary fine filtering tank, so that the aluminum hydroxide precipitate in the acid-base neutralization waste alkali liquid is completely filtered out; and a conveying pump V is arranged on the output pipeline of the secondary fine filtering tank.

[0020] In order to increase the storage capacity of the fine filtering liquid, the filtering liquid storage tank is connected with the storage cavity of the secondary fine filtering tank through a connecting pipeline and the conveying pump V, and the bottom of the filtering liquid storage tank is provided with a filtering liquid discharge port.

[0021] The control panel controls the acid-base neutralization treatment equipment through control signals, completes the control of waste acid liquid impurity filtering, waste alkali liquid impurity filtering, acid-base neutralization liquid conveying and filtering, agitator rotation, realizes automatic treatment operation of the waste alkali liquid, and is provided with an emergency stop button on the control panel.

[0022] Beneficial effects:

[0023] (1) The utility model has high integration and automation, can realize automatic treatment of the activated waste alkali liquid, is convenient for batch treatment of the activated waste alkali liquid of the electrolytic tank, reduces the treatment cost of the activated waste alkali liquid, thereby improves the economy and practicality of hydrogen.

[0024] (2) The control panel arranged in the utility model realizes automatic treatment operation of the activated waste alkali liquid, and is provided with an emergency stop button on the control panel.

[0025] (3) The utility model is provided with a primary coarse filtering tank and a secondary fine filtering tank; the coarse filtering liquid is filtered again by the filtering element IV to enter the storage cavity of the secondary fine filtering tank, so that the aluminum hydroxide precipitate in the acid-base neutralization waste alkali liquid is completely filtered out. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structure schematic diagram of the utility model;

[0027] In the figure: 1-waste acid liquid impurity filter tank, 2-filter element I, 3-connection pipeline and delivery pump I, 4-waste lye impurity filter tank, 5-filter element II, 6-connection pipeline and delivery pump II, 7-acid-alkali neutralization reaction tank, 8-stirrer, 9-control panel, 10-connection pipeline and delivery pump III, 11-first-stage rough filter tank I, 12-filter element III, 13-connection pipeline and delivery pump IV, 14-second-stage fine filter tank, 15-filter element IV, 16-connection pipeline and delivery pump V, 17-filtrate storage tank, 18-fine filtrate discharge port, 19-first-stage rough filter tank II, 20-filter element V, 21-vacuum extraction pipeline, 22-vacuum extraction equipment, 23-stirring motor. DETAILED DESCRIPTION

[0028] The utility model will be made further detailed explanation in combination with the drawings and examples.

[0029] Example 1:

[0030] Referring to the accompanying drawings Figure 1 An automatic equipment for treating waste lye of electrolytic cell nickel net activation, comprising:

[0031] Waste acid liquid impurity filter tank 1 for filtering impurities in waste acid liquid; filter element I 2 is arranged in waste acid liquid impurity filter tank 1 to divide waste acid liquid filter chamber and storage chamber; delivery pump I 3 is arranged on the output pipeline of waste acid liquid impurity filter tank 1.

[0032] Waste lye impurity filter tank 4 for filtering impurities in waste lye; filter element II 5 is arranged in waste lye impurity filter tank 4 to divide waste lye filter chamber and storage chamber; delivery pump II 6 is arranged on the output pipeline of waste lye impurity filter tank 4.

[0033] Acid-alkali neutralization reaction tank 7 communicated with the output pipeline of waste acid liquid impurity filter tank 1 and waste lye impurity filter tank 4 respectively; stirrer 8 is arranged in acid-alkali neutralization reaction tank 7; stirrer 8 is located in the middle of acid-alkali neutralization reaction tank 7, and three blades are distributed in the horizontal direction; stirrer 8 is driven by stirring motor 23; delivery pump III 10 is arranged on the output pipeline of acid-alkali neutralization reaction tank 7.

[0034] First-stage rough filter tank I 11 and first-stage rough filter tank II 19 communicated with the output pipeline of acid-alkali neutralization reaction tank 7 respectively; filter element III 12 is arranged in first-stage rough filter tank I 11 to divide filter chamber and storage chamber; filter element V 20 is arranged in first-stage rough filter tank II 19 to divide filter chamber and storage chamber; vacuum extraction equipment 22 is connected with the storage chambers of first-stage rough filter tank I 11 and first-stage rough filter tank II 19 through vacuum extraction pipeline 21; delivery pump IV 13 is arranged on the output pipeline of first-stage rough filter tank I 11 and first-stage rough filter tank II 19.

[0035] A second-stage fine filter tank 14 is connected to the output pipeline of the first-stage coarse filter tank I 11 and the first-stage coarse filter tank II 19 respectively; the second-stage fine filter tank 14 is provided with a filter element IV 15; a delivery pump V 16 is arranged on the output pipeline of the second-stage fine filter tank 14.

[0036] A filtrate storage tank 17 is connected to the output pipeline of the second-stage fine filter tank 14; the bottom of the filtrate storage tank 17 is provided with a filtrate discharge port 18.

[0037] A control panel 9 is arranged to control the delivery of the output pipelines and the agitator 8.

[0038] Example 2

[0039] Based on the example 1, the working process of an automatic equipment for treating waste caustic solution of nickel mesh activation of electrolytic cell is further described:

[0040] In the waste caustic solution acid-base neutralization treatment equipment, the filter element I 2 divides the waste acid solution impurity filter tank 1 into a waste acid solution filtering cavity and a storage cavity, the filter element I 2 completes the impurity filtration of the waste acid solution, and the waste acid solution with impurities removed enters the storage cavity of the waste acid solution impurity filter tank 1; the filter element II 5 divides the waste caustic solution impurity filter tank 4 into a waste caustic solution filtering cavity and a storage cavity, the filter element II 5 completes the impurity filtration of the waste caustic solution, and the waste caustic solution with impurities removed enters the storage cavity of the waste caustic solution impurity filter tank 4. The connecting pipeline and the delivery pump I 3 deliver the waste acid solution with impurities removed in the waste acid solution impurity filter tank 1 to the acid-base neutralization reaction tank 7, and the connecting pipeline and the delivery pump II 6 deliver the waste caustic solution with impurities removed in the waste caustic solution impurity filter tank 4 to the acid-base neutralization reaction tank 7.

[0041] The reaction tank is the core of the acid-base neutralization treatment equipment, and directly affects the acid-base neutralization treatment effect. The stirrer 8 is arranged in the acid-base neutralization reaction tank 7, so as to ensure that the activated waste lye and waste acid are fully mixed and reacted. The acid-base neutralization reaction tank 7 is connected with the first-stage rough filtration tank I 11 and the first-stage rough filtration tank II 19 through the connecting pipeline and the delivery pump III 10. The filtration element III 12 and the filtration element V 20 divide the first-stage rough filtration tank I 11 and the first-stage rough filtration tank II 19 into a filtration cavity and a storage cavity (vacuum cavity). The neutralization liquid in the acid-base neutralization reaction tank 7 is delivered to the filtration cavities of the first-stage rough filtration tank I 11 and the first-stage rough filtration tank II 19 through the connecting pipeline and the delivery pump III 10. The vacuum equipment 22 is connected with the storage cavities (vacuum cavities) of the first-stage rough filtration tank I 11 and the first-stage rough filtration tank II 19 through the vacuum pipeline 21. The storage cavities (vacuum cavities) of the first-stage rough filtration tank I 11 and the first-stage rough filtration tank II 19 are set to be vacuum through the vacuum equipment 22. The neutralization liquid is separated into solid and liquid under the pressure difference between the upstream and downstream sides of the filtration element III 12 and the filtration element V 20. The aluminum hydroxide precipitate is left in the filtration cavities of the first-stage rough filtration tank I 11 and the first-stage rough filtration tank II 19, and the rough filtration liquid enters the storage cavities (vacuum cavities) of the first-stage rough filtration tank I 11 and the first-stage rough filtration tank II 19.

[0042] The filtration element IV 15 divides the second-stage fine filtration tank 14 into a filtration cavity and a storage cavity. The first-stage rough filtration tank I 11 and the first-stage rough filtration tank II 19 are connected with the second-stage fine filtration tank 14 through the connecting pipeline and the delivery pump IV 13. The rough filtration liquid is delivered into the second-stage fine filtration tank 14 through the connecting pipeline and the delivery pump IV 13. The rough filtration liquid is filtered again through the filtration element IV 15, so that the aluminum hydroxide precipitate in the activated waste liquid is completely filtered out. The fine filtration liquid enters the storage cavity of the second-stage fine filtration tank 14. The second-stage fine filtration tank 14 is connected with the filtrate storage tank 17 through the connecting pipeline and the delivery pump V 16. The fine filtration liquid is delivered into the filtrate storage tank 17 through the connecting pipeline and the delivery pump V 16 for storage. The filtrate discharge port 18 is located at the bottom of the filtrate storage tank 17. The filtrate storage tank 17 discharges the fine filtration liquid through the filtrate discharge port 18.

[0043] The control panel 9 controls the delivery of the waste lye and the acid-base neutralization liquid and the rotation of the stirrer 8 through control signals, so as to realize the automatic operation of the waste lye treatment.

[0044] Although the utility model has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the utility model belong to the scope of protection required by the utility model.

Claims

1. An automated apparatus for the treatment of spent caustic liquor for the activation of nickel mesh in electrolytic cells, characterized by, It comprises: waste acid liquid impurity filtering tank (1) for filtering impurities in waste acid liquid; waste lye impurity filtering tank (4) for filtering impurities in waste lye; acid-alkali neutralization reaction tank (7) in communication with the output pipelines of the waste acid liquid impurity filtering tank (1) and the waste lye impurity filtering tank (4) respectively; the acid-alkali neutralization reaction tank (7) is provided with a stirrer (8) therein; first-stage rough filtering tank I (11) and first-stage rough filtering tank II (19) in communication with the output pipelines of the acid-alkali neutralization reaction tank (7) respectively; second-stage fine filtering tank (14) in communication with the output pipelines of the first-stage rough filtering tank I (11) and the first-stage rough filtering tank II (19) respectively; filtrate storage tank (17) in communication with the output pipeline of the second-stage fine filtering tank (14); control panel (9) for controlling the delivery of each output pipeline and the stirrer (8).

2. The automatic device for treating waste lye in the activation of nickel mesh of electrolytic cell according to claim 1, wherein the waste acid liquid impurity filtering tank (1) is provided with a filtering element I (2) for dividing it into a waste acid liquid filtering chamber and a storage chamber; the output pipeline of the waste acid liquid impurity filtering tank (1) is provided with a delivery pump I (3); the waste lye impurity filtering tank (4) is provided with a filtering element II (5) for dividing it into a waste lye filtering chamber and a storage chamber; the output pipeline of the waste lye impurity filtering tank (4) is provided with a delivery pump II (6).

3. An automated apparatus for the treatment of spent caustic solution from the activation of nickel mesh in electrolytic cells according to claim 1 or 2, characterized in that, The stirrer (8) is located in the middle of the acid-alkali neutralization reaction tank (7) and has three blades distributed in the horizontal direction; the stirrer (8) is driven by a stirring motor (23); the output pipeline of the acid-alkali neutralization reaction tank (7) is provided with a delivery pump III (10).

4. The automatic device for treating waste lye in the activation of nickel mesh of electrolytic cell according to claim 3, wherein the first-stage rough filtering tank I (11) is provided with a filtering element III (12) for dividing it into a filtering chamber and a storage chamber; the first-stage rough filtering tank II (19) is provided with a filtering element V (20) for dividing it into a filtering chamber and a storage chamber; a vacuum extraction device (22) is connected to the storage chambers of the first-stage rough filtering tank I (11) and the first-stage rough filtering tank II (19) through a vacuum extraction pipeline (21); the output pipelines of the first-stage rough filtering tank I (11) and the first-stage rough filtering tank II (19) are provided with a delivery pump IV (13).

5. An automated apparatus for the treatment of spent caustic solution from the activation of nickel mesh in electrolytic cells as claimed in claim 4, characterized in that, The second-stage fine filtering tank (14) is provided with a filtering element IV (15); the output pipeline of the second-stage fine filtering tank (14) is provided with a delivery pump V (16).

6. An automated apparatus for treating spent caustic solution from nickel mesh activation of electrolytic cells as claimed in claim 1 or 2, wherein, The bottom of the filtrate storage tank (17) is provided with a filtrate discharge port (18).

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