Carbonate-containing evaporation mother liquor and industrial waste acid combined treatment system

Abstract

The utility model discloses a carbonate-containing evaporation mother liquor and industrial waste acid combined treatment system, which comprises a pipeline blender, an evaporation mother liquor conveying device, a waste acid conveying device, an evaporation mother liquor conveying device and an industrial waste acid conveying device, the reactor is used for receiving the evaporation mother liquor and the waste acid conveyed by the pipeline mixer and enabling the evaporation mother liquor and the waste acid to be subjected to contact reaction in the reactor; the slag scraper is arranged at the top of the reactor and is used for scraping macromolecular organic matters enriched on the surface of liquid above the reactor into the collecting tank; and the plate and frame filter is used for receiving sediments generated in the reactor and carrying out filter pressing treatment on the sediments. According to the device disclosed by the utility model, the evaporation mother liquor and various industrial waste acids can be co-processed, and the generated waste water can be further reduced by adopting a concentration mode due to the reduction of impurities through processing, so that the disposal amount of incineration can be greatly reduced, the energy consumption is effectively reduced, the disposal cost is reduced, and the device has higher economic and social benefits.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of carbonate-containing evaporation mother liquor and industrial waste acid treatment, in particular to a carbonate-containing evaporation mother liquor and industrial waste acid combined disposal system. BACKGROUND

[0002] In 2022, the sodium carbonate output of China's above-scale industrial enterprises was 2920.2 million tons, and as the most common chemical raw material in industrial production, its usage is huge. A large part of these sodium carbonates form industrial salt-containing wastewater. Due to the generally high salt content, this type of salt-containing wastewater cannot be directly disposed of biologically, so each waste-producing unit generally adopts a concentration method for reduction treatment. The condensate water produced can be directly disposed of biologically, while some salts including carbonates are enriched in the evaporation mother liquor. At the same time, some organic by-products produced during the synthesis process are also concentrated in the mother liquor, resulting in a large amount of high-boiling organic matter in the mother liquor. The large molecular weight of this part of organic matter will cause the mother liquor to foam during evaporation, or the organic impurities to precipitate into a gel, making the mother liquor unable to be further concentrated and disposed of. Therefore, it is necessary to further find a more effective disposal method.

[0003] Industrial waste acid is a common industrial hazardous waste with a huge output. In 2022, the total amount of various types of waste acid produced in China was 98.38 million tons. Due to the characteristics of different acidities, different compositions, many impurities, and strong corrosiveness, the cost of separate disposal is high and the difficulty is great.

[0004] When this type of evaporation mother liquor is disposed of separately, the high-boiling organic water-soluble gum and various types of salt impurities in the evaporation mother liquor will be enriched simultaneously during concentration, which will cause foaming and pipeline blockage. Further evaporation is extremely difficult. The cost of separate disposal of industrial waste acid is high and the difficulty is great. Therefore, a carbonate-containing evaporation mother liquor and industrial waste acid combined disposal system is designed. UTILITY MODEL CONTENTS

[0005] In view of the defects or deficiencies in the disposal of carbonate-containing evaporation mother liquor and industrial waste acid, the utility model aims to provide a carbonate-containing evaporation mother liquor and industrial waste acid combined disposal system, which can realize the collaborative disposal of this type of evaporation mother liquor and various types of industrial waste acid, greatly reduce the disposal amount of incineration, effectively reduce energy consumption, reduce disposal cost, and have high economic and social benefits.

[0006] To achieve the above utility model purposes, the utility model adopts the following technical solutions:

[0007] The utility model provides a kind of carbonate-containing evaporation mother liquor and industrial waste acid combined disposal system, comprising: pipeline mixer, for the transport of evaporation mother liquor and waste acid;Reactor, for receiving the evaporation mother liquor and waste acid transported by the pipeline mixer and allowing the evaporation mother liquor and waste acid to contact and react in the reactor;Slag scraper, which is arranged at the top of the reactor, for scraping the macromolecular organic matter enriched on the liquid surface above the reactor into the collection tank;Plate-and-frame filter, for receiving the precipitate generated in the reactor and performing pressure filtration treatment;Clear liquid receiving tank, for receiving the clear liquid discharged from the reactor and the filtrate filtered by the plate-and-frame filter.

[0008] Preferably, the pipeline mixer is arranged on one side of the outer wall of the reactor, and the pipeline mixer is connected with the reactor, and the pipeline mixer is provided with a mother liquor inlet for adding evaporation mother liquor and a waste acid inlet for adding waste acid.

[0009] Preferably, the bottom of the reactor is provided with a sludge discharge port for discharging sludge, and the sludge discharge port transports the sludge into the plate-and-frame filter by pumping.

[0010] Preferably, a first clear liquid discharge port is arranged on the other side of the outer wall of the reactor, and the first clear liquid discharge port is connected with the liquid inlet of the clear liquid receiving tank through a conveying pipeline.

[0011] Preferably, the filtrate discharge port of the plate-and-frame filter is connected with the liquid inlet of the clear liquid receiving tank through a conveying pipeline.

[0012] Preferably, a second clear liquid discharge port is arranged on one side of the outer wall of the clear liquid receiving tank, and the second clear liquid discharge port transports the clear liquid into the evaporator by pumping.

[0013] Compared with the prior art, the above one or more technical solutions have the following beneficial effects:

[0014] The utility model uses the technology of combined disposal, utilizes the mutual reaction of each effective component in waste acid and evaporation mother liquor, achieves the purpose of synergistic disposal of waste acid, and increases the added value of unit disposal amount.

[0015] Through the use of the utility model, while synergistically disposing waste acid, the gas and organic matter entrained and stripped out are separated, the generated precipitate and other substances further reduce the ion concentration in the mother liquor, which can further concentrate and dispose the mother liquor, effectively reduce the amount, and reduce the overall disposal cost.

[0016] Through the use of the utility model, the disposal efficiency is improved, continuous disposal can be realized, the reaction liquid is preliminarily precipitated, the clear liquid directly participates in concentration, and the precipitate is subjected to plate and frame filtration, the situation of all filtration in the traditional kettle type production mode is avoided, the effective utilization rate of the plate and frame is improved, unnecessary working time is reduced, and work efficiency is improved.

[0017] Through the use of the utility model, waste acid and weak acid salt such as carbonate bicarbonate in evaporation mother liquor react, replace gas, the gas is generated and released in molecular form, can effectively wrap residual macromolecular organic matter in the mother liquor in the floating process, can replace the effect of traditional air flotation, reduces equipment investment and energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification provide further understanding of the utility model, the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute undue limitation on the utility model.

[0019] Figure 1 It is the structure schematic view of the combined disposal system of evaporation mother liquor containing carbonate and industrial waste acid provided by the utility model.

[0020] In the drawing:

[0021] 100, slag scraper;

[0022] 200, reactor; 201, dross discharge port; 202, sludge discharge port; 203, first clear liquid discharge port;

[0023] 300, pipeline mixer; 301, mother liquor inlet; 302, waste acid inlet;

[0024] 400, plate and frame filter;

[0025] 500, clear liquid receiving tank; 501, second clear liquid discharge port. DETAILED DESCRIPTION

[0026] The utility model will be further described below in combination with the drawings and embodiments.

[0027] It should be pointed out that the following detailed description is exemplary, and is intended to provide further description of the utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as generally understood by those skilled in the art to which the utility model belongs.

[0028] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0029] As shown in Figure 1 A carbonate-containing evaporation mother liquor and industrial waste acid combined disposal system comprises:

[0030] A pipeline mixer 300 is arranged for conveying the evaporation mother liquor and the waste acid.

[0031] A reactor 200 is arranged for receiving the evaporation mother liquor and the waste acid conveyed by the pipeline mixer 300 and enabling the evaporation mother liquor and the waste acid to react in the reactor 200.

[0032] A slag scraper 100 is arranged at the top of the reactor 200 and is arranged for scraping the macromolecular organic matter enriched on the liquid surface above the reactor 200 into a collecting tank.

[0033] A plate-and-frame filter 400 is arranged for receiving the precipitate generated in the reactor 200 and performing pressure filtration on the precipitate.

[0034] A clear liquid receiving tank 500 is arranged for receiving the clear liquid discharged from the reactor 200 and the filtrate filtered by the plate-and-frame filter 400.

[0035] The pipeline mixer 300 is arranged on one side of the outer wall of the reactor 200 and penetrates through the reactor 200, the pipeline mixer 300 is provided with a mother liquor inlet 301 for adding the evaporation mother liquor and a waste acid inlet 302 for adding the waste acid, the evaporation mother liquor and the waste acid are added into the pipeline mixer 300 through the mother liquor inlet 301 and the waste acid inlet 302 respectively, and the pipeline mixer 300 conveys the evaporation mother liquor and the waste acid into the reactor 200 for reaction.

[0036] The bottom of the reactor 200 is provided with a sludge discharge port 202 for discharging sludge, the sludge discharge port 202 conveys the sludge into the plate-and-frame filter 400 by pumping, the sludge precipitated in the reactor 200 is discharged through the sludge discharge port 202, and the sludge discharged from the sludge discharge port 202 is conveyed into the plate-and-frame filter 400 for pressure filtration by pumping.

[0037] The other side wall of the reactor 200 is provided with a first clear liquid discharge port 203, which is connected to the liquid inlet of the clear liquid receiving tank 500 through a conveying pipeline. After the reaction between the evaporated mother liquor and the waste acid in the reactor 200 is completed and a period of time is allowed to elapse, the reacted clear liquid is discharged from the first clear liquid discharge port 203 into the clear liquid receiving tank 500 for collection.

[0038] The filtrate discharge port of the plate-and-frame filter 400 is connected to the liquid inlet of the clear liquid receiving tank 500 through a conveying pipeline. The plate-and-frame filter 400 is used to press filter the sludge precipitate, and the filtered filtrate is discharged from the filtrate discharge port of the plate-and-frame filter 400 into the clear liquid receiving tank 500 for collection.

[0039] The side wall of the clear liquid receiving tank 500 is provided with a second clear liquid discharge port 501, which is used to pump the clear liquid into an evaporator. The clear liquid in the clear liquid receiving tank 500 is discharged through the second clear liquid discharge port 501. The clear liquid discharged from the second clear liquid discharge port 501 is pumped into the evaporator for further concentration and disposal.

[0040] In use, the worker makes the evaporation mother liquor and waste acid respectively through the mother liquor feeding port 301 and the waste acid feeding port 302 to be added into the pipeline mixer 300, the pipeline mixer 300 transports the evaporation mother liquor and the waste acid into the reactor 200, the evaporation mother liquor and the waste acid carry out the contact reaction in the reactor 200, the gas generated in the reaction process promotes the mixing of the reaction liquid and blows the macromolecular organic matter in water to the liquid surface, at this time, the slag scraper 100 can scrape the macromolecular organic matter enriched on the liquid surface of the reactor 200 to the collecting tank, various inorganic matters carry out the metathesis reaction with each other, and the precipitate is gradually enriched at the bottom of the reactor, after the reaction between the evaporation mother liquor and the waste acid in the reactor 200 is completed and a period of time is kept, the sludge precipitated in the reactor 200 can be discharged through the sludge discharge port 202, the sludge discharged through the sludge discharge port 202 can be transported into the plate and frame filter 400 through the pumping mode to carry out the pressure filtration, the filtrate after the pressure filtration is discharged through the filtrate discharge port of the plate and frame filter 400 into the clear liquid receiving tank 500 to be collected, the filter cake carries out the related detection and then is further disposed, the clear liquid after the reaction is completed is discharged through the first clear liquid discharge port 203 into the clear liquid receiving tank 500 to be collected, after the clear liquid is collected, the clear liquid in the clear liquid receiving tank 500 is discharged through the second clear liquid discharge port 501, the clear liquid discharged through the second clear liquid discharge port 501 is transported into the evaporator through the pumping mode to be further concentrated and disposed, so that the evaporation mother liquor and various industrial waste acids can be disposed cooperatively, the wastewater generated through the treatment can be further concentrated to reduce the amount, the disposal amount of incineration can be greatly reduced, the energy consumption can be effectively reduced, the disposal cost can be reduced, and the economic and social benefits are high.

[0041] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A system for the combined treatment of carbonate-containing evaporation mother liquor and industrial waste acid, characterized in that, include: Pipeline mixer (300) is used for conveying evaporation mother liquor and waste acid; The reactor (200) is used to receive the mother liquor and waste acid conveyed by the pipeline mixer (300) and to allow the mother liquor and waste acid to react in contact within it; Sludge scraper (100) is installed at the top of reactor (200) to scrape off the large molecular organic matter enriched on the liquid surface above reactor (200) into the collection tank; A plate and frame filter press (400) is used to receive the precipitate generated in the reactor (200) and perform pressure filtration on it; The clear liquid receiving tank (500) is used to receive the clear liquid discharged from the reactor (200) and the filtrate filtered by the plate and frame filter (400).

2. The combined treatment system for carbonate-containing evaporation mother liquor and industrial waste acid according to claim 1, characterized in that: The pipeline mixer (300) is located on one side of the outer wall of the reactor (200) and is connected to the reactor (200). The pipeline mixer (300) is provided with a mother liquor inlet (301) for adding evaporating mother liquor and a waste acid inlet (302) for adding waste acid.

3. The combined treatment system for carbonate-containing evaporation mother liquor and industrial waste acid according to claim 1, characterized in that: The bottom of the reactor (200) is provided with a sludge discharge port (202) for discharging sludge, and the sludge discharge port (202) pumps the sludge into the plate and frame filter (400).

4. The combined treatment system for carbonate-containing evaporation mother liquor and industrial waste acid according to claim 1, characterized in that: A first clear liquid discharge port (203) is provided on the outer wall of the other side of the reactor (200), and the first clear liquid discharge port (203) is connected to the liquid inlet on the clear liquid receiving tank (500) through a conveying pipe.

5. The combined treatment system for carbonate-containing evaporation mother liquor and industrial waste acid according to claim 1, characterized in that: The filtrate outlet of the plate and frame filter (400) is connected to the inlet of the clear liquid receiving tank (500) via a conveying pipe.

6. The combined treatment system for carbonate-containing evaporation mother liquor and industrial waste acid according to claim 1, characterized in that: A second clear liquid discharge port (501) is provided on one side of the outer wall of the clear liquid receiving tank (500), and the clear liquid is pumped into the evaporator through the second clear liquid discharge port (501).

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