Oxidized wax acid water treatment device

Abstract

The utility model relates to an oxidized wax acid water treatment device. The oxidized wax acid water treatment device comprises an acid liquor storage tank, an alkali liquor storage tank, a mixer, an evaporator and an incinerator, wherein the acid liquor storage tank and the alkali liquor storage tank are used for storing acid wastewater and an alkali solution; the mixer is configured to receive the acidic wastewater and the alkaline solution and mix the acidic wastewater and the alkaline solution to generate an acid-base neutralization reaction to generate a mixed solution; the evaporator is configured to receive the mixed solution from the mixer and heat the mixed solution to generate tail gas; the incinerator is configured to receive and incinerate the tail gas generated by the evaporator. By neutralizing with an alkaline solution, corrosion to a mixer and a device in the subsequent treatment process is reduced, organic matter components in the mixer are combusted through the incinerator, finally, the preset tail gas concentration allowed to be discharged is achieved, then the tail gas is safely discharged into the atmosphere, pollution to the environment is reduced, and the environmental protection effect is achieved. Therefore, the acid wastewater in the oxidized wax production process is treated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of oxidized wax production, and particularly to an oxidized wax acid water treatment device. Background Art

[0002] Oxidized wax has excellent emulsifying property, lubricity and oil solubility, and thus is widely used in fields such as textiles, inks and coatings, rubber and plastic processing, etc.

[0003] During the production process of oxidized wax, a large amount of gaseous products are generated from the raw material wax at high temperature in the oxidation reactor. After cooling, the gaseous products form a large amount of acidic wastewater, which contains a large amount of organic acids, has strong acidity, and seriously corrodes the equipment for oxidized wax production.

[0004] The existing oxidized wax acid water treatment usually adopts water washing of the gaseous products to separate the organic compounds therein, reduce the organic acids in the acidic wastewater, and then evaporate the acidic wastewater, and the treatment is carried out by methods such as incineration or filtration adsorption. However, the acidic gas formed after evaporation still seriously corrodes the equipment.

[0005] Therefore, those skilled in the art need to design an oxidized wax acid water treatment device that can treat the acidic wastewater generated during the production process of oxidized wax and solve the problem of serious equipment corrosion during the treatment process. Content of the Utility Model

[0006] The purpose of the present disclosure is to overcome the deficiencies of the prior art and provide an oxidized wax acid water treatment device.

[0007] The present disclosure provides an oxidized wax acid water treatment device, which includes:

[0008] An acid liquid storage tank, which is configured to receive and store the acidic wastewater generated in the oxidized wax production system under the action of a first power element;

[0009] An alkali liquid storage tank, which is configured to store an alkaline solution;

[0010] A mixer, which is connected to the acid liquid storage tank and the alkali liquid storage tank, and is configured to receive the acidic wastewater and the alkaline solution under the action of a second power element and mix the acidic wastewater with the alkaline solution to undergo an acid-base neutralization reaction to generate a mixed solution;

[0011] An evaporator, which is connected to the mixer, and is configured to receive the mixed solution from the mixer under the action of a third power element and heat it until the un-neutralized organic matter evaporates into tail gas;

[0012] An incinerator, which is connected to the steam evaporator and is configured to receive the tail gas generated by the steam evaporator and incinerate it under the action of a fourth power element.

[0013] In one embodiment of the present disclosure, a tail gas detection element is provided at the outlet of the incinerator. The tail gas detection element is configured to detect the concentration of the incinerated tail gas. A switching valve is provided at the outlet of the incinerator. The switching valve is communicatively connected to the tail gas detection element and is configured to close or open the outlet of the incinerator based on the relationship between the actual tail gas concentration detected by the tail gas detection element and the preset tail gas concentration allowed to be discharged.

[0014] In one embodiment of the present disclosure, when the actual tail gas concentration detected by the tail gas detection element is less than the preset tail gas concentration allowed to be discharged, the outlet of the incinerator is opened;

[0015] When the actual tail gas concentration detected by the tail gas detection element is greater than the preset tail gas concentration allowed to be discharged, the outlet of the incinerator is closed.

[0016] In one embodiment of the present disclosure, a stirrer is provided in the lye storage tank. The stirrer is configured to mix and stir the added solid alkali and water to form a uniform alkaline solution.

[0017] In one embodiment of the present disclosure, the alkaline solution is a sodium hydroxide solution.

[0018] In one embodiment of the present disclosure, a stirrer is provided in the mixer. The stirrer is configured to make the acid-base neutralization reaction occur sufficiently.

[0019] In one embodiment of the present disclosure, the evaporator is a steam evaporator.

[0020] In one embodiment of the present disclosure, the first power element is an acid liquid delivery pump; and / or,

[0021] The second power element and the third power element are infusion pumps; and / or,

[0022] The fourth power element is a induced draft fan.

[0023] In one embodiment of the present disclosure, control valves are provided on the connecting pipelines of the acid liquid storage tank and the lye storage tank to the mixer, on the connecting pipeline of the mixer to the evaporator, and on the connecting pipeline of the evaporator to the incinerator. The control valves are configured to control the closing or opening of the pipelines.

[0024] In one embodiment of the present disclosure, any one of the acid liquid storage tank, the lye storage tank, the mixer, the evaporator, and the incinerator is made of stainless steel.

[0025] One beneficial effect of the oxidized wax acid water treatment device of the present disclosure is that by using the oxidized wax acid water treatment device of the present disclosure, the gas-phase product is cooled to form acidic wastewater. Under the action of the first power element, the acidic wastewater enters the acid liquid storage tank through a pipeline. An alkaline solution is stored in the alkaline liquid storage tank. Under the action of the second power element, the acidic wastewater and the alkaline solution enter the mixer through a pipeline. In the mixer, the acidic wastewater and the alkaline solution undergo an acid-base neutralization reaction to generate a mixed solution. Under the action of the third power element, the mixed solution that has fully undergone the acid-base neutralization reaction enters the evaporator through a pipeline. Water vapor and organic substances that have not undergone the acid-base neutralization reaction are evaporated through the evaporator to form tail gas. Under the action of the fourth power element, the tail gas enters the incinerator through a pipeline, and the organic substance components therein are burned, and then discharged into the atmosphere. The acidic wastewater generated during the production process of oxidized wax has a complex composition. After cooling and mixing with the alkaline solution, a part of the acidic substances that can undergo neutralization reactions is removed, reducing the corrosiveness of the mixer and the devices in the subsequent treatment process. Then, the organic substance components therein are burned in the incinerator, and finally, the preset tail gas concentration that allows discharge is reached, and then safely discharged into the atmosphere, reducing environmental pollution, thereby realizing the treatment of acidic wastewater during the production process of oxidized wax. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present disclosure and, together with the description, are used to explain the principles of the present disclosure.

[0027] Figure 1 is a schematic structural diagram of an oxidized wax acid water treatment device provided by an embodiment of the present disclosure.

[0028] Figure 1 The one-to-one correspondence between the names of the components and the reference numerals in the

[0029] 1 - acid liquid storage tank; 2 - alkaline liquid storage tank; 3 - mixer; 4 - evaporator; 5 - incinerator; 6 - first power element; 7 - second power element; 8 - third power element; 9 - fourth power element; 10 - tail gas detection element; 11 - switch valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Now, various exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way limits the present disclosure, its application, or its use.

[0032] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered as part of the specification.

[0033] In all examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0034] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof in subsequent figures is not required.

[0035] In this document, "upper", "lower", "front", "rear", "left", "right", etc. are only used to represent the relative positional relationship between relevant parts, rather than defining the absolute positions of these relevant parts.

[0036] In this document, "first", "second", etc. are only used to distinguish between each other, rather than indicating importance, order, and the premise of mutual existence, etc.

[0037] In this document, "equal", "same", etc. are not strict mathematical and / or geometric limitations, and also include errors that can be understood by those skilled in the art and are allowed in manufacturing or using, etc.

[0038] In order to solve the problems of treating acidic wastewater generated in the production process of oxidized wax and serious equipment corrosion, the present disclosure provides an oxidized wax acid water treatment device. For ease of understanding, the following will refer to Figure 1 , and in conjunction with the embodiments, the specific structure and working principle of the oxidized wax acid water treatment device of the present disclosure will be described in detail.

[0039] In one embodiment, the oxidized wax acid water treatment device of the present disclosure includes an acid liquid storage tank 1, an alkali liquid storage tank 2, a mixer 3, an evaporator 4, and an incinerator 5. Among them, the acid liquid storage tank 1 is configured to receive and store acidic wastewater generated in the oxidized wax production system under the action of a first power element 6; the alkali liquid storage tank 2 is configured to store an alkaline solution; the mixer 3 is connected to the acid liquid storage tank 1 and the alkali liquid storage tank 2, and is configured to receive the acidic wastewater and the alkaline solution and mix the acidic wastewater with the alkaline solution to undergo an acid-base neutralization reaction to generate a mixed solution under the action of a second power element 7; the evaporator 4 is connected to the mixer 3, and is configured to receive the mixed solution from the mixer 3 and heat it to evaporate the un-neutralized organic matter into tail gas under the action of a third power element 8; the incinerator 5 is connected to the evaporator 4, and is configured to receive the tail gas generated by the evaporator 4 and incinerate it under the action of a fourth power element 9.

[0040] Specifically, the reactor generates gaseous products through high-temperature oxidation reaction, and the gaseous products form acidic wastewater after cooling. The gaseous products mainly include water vapor, carbon dioxide, organic matter, and small-molecule volatiles formed by the breakage or rearrangement of raw material wax during the oxidation process. The cooled acidic wastewater mainly contains carbonic acid and various organic acids. Under the action of the first power element 6, the acidic wastewater enters the acid storage tank 1 through a pipeline. The alkali storage tank 2 stores an alkaline solution. Under the action of the second power element 7, the acidic wastewater and the alkaline solution enter the mixer 3 through a pipeline. In the mixer 3, the acidic wastewater and the alkaline solution undergo an acid-base neutralization reaction to generate a mixed solution. The acidity and alkalinity of the mixed solution are close to neutral, usually weakly alkaline, reducing the corrosion of the mixer 3 and the devices in the subsequent treatment process.

[0041] Under the action of the third power element 8, the mixed solution that has fully undergone the acid-base neutralization reaction enters the evaporator 4 through a pipeline. Water vapor and organic matter that have not undergone the acid-base neutralization reaction are evaporated through the evaporator 4 to form tail gas. Under the action of the fourth power element 9, the tail gas enters the incinerator 5 through a pipeline, and the organic matter components therein are burned, and then discharged into the atmosphere. The composition of the gaseous products of oxidized wax is complex. After cooling and mixing with the alkaline solution, a part of the acidic substances that can undergo neutralization reactions is removed. Then, the organic matter components in the incinerator 5 are burned, and finally the preset tail gas concentration that allows discharge is reached, and then safely discharged into the atmosphere, reducing environmental pollution, thereby realizing the treatment of acidic wastewater in the production process of oxidized wax.

[0042] In one embodiment, a tail gas detection element 10 is provided at the outlet of the incinerator 5. The tail gas detection element 10 is configured to detect the concentration of the incinerated tail gas. A switch valve 11 is provided at the outlet of the incinerator 5. The switch valve 11 is communicatively connected to the tail gas detection element 10 and is configured to close or open the outlet of the incinerator 5 based on the relationship between the actual tail gas concentration detected by the tail gas detection element 10 and the preset tail gas concentration that allows discharge.

[0043] Specifically, there is a tail gas detection element 10 at the outlet of the incinerator 5. The tail gas detection element 10 can be used to detect the tail gas concentration, mainly including the concentration of organic components therein. There is also a switching valve 11 provided at the outlet of the incinerator 5, and the switching valve 11 is communicatively connected to the tail gas detection element 10, which can be achieved through a PLC controller. The PLC controller, namely the Programmable Logic Controller (abbreviated as PLC), is a digital electronic device with a microprocessor and is a digital logic controller for automatic control. It can load control instructions into the memory for storage and execution at any time. The programmable controller is modularly composed of an internal CPU, instruction and data memory, input and output units, power supply module, digital and analog units, etc., and is widely used in the industrial control field. Based on the relationship between the actual tail gas concentration detected by the tail gas detection element 10 and the preset tail gas concentration allowed for emission, the controller controls the closing or opening of the outlet of the incinerator 5, ensuring that the tail gas discharged into the atmosphere is qualified and reducing environmental pollution.

[0044] In one embodiment, when the actual tail gas concentration detected by the tail gas detection element 10 is less than the preset tail gas concentration allowed for emission, the outlet of the incinerator 5 is opened; when the actual tail gas concentration detected by the tail gas detection element 10 is greater than the preset tail gas concentration allowed for emission, the outlet of the incinerator 5 is closed.

[0045] Specifically, the specific value of the preset tail gas concentration allowed for emission is stored in the tail gas detection element 10. When the actual tail gas concentration detected by the tail gas detection element 10 is less than the preset tail gas concentration allowed for emission, the controller controls the opening of the outlet of the incinerator 5 to discharge the qualified tail gas into the atmosphere. When the actual tail gas concentration detected by the tail gas detection element 10 is greater than the preset tail gas concentration allowed for emission, the controller controls the closing of the outlet of the incinerator 5 and continues to burn the tail gas for a preset time. After reaching the preset time, the tail gas concentration is detected again, and the above steps are repeated until the actual tail gas concentration detected is less than the preset tail gas concentration allowed for emission, and the qualified tail gas is discharged into the atmosphere. With such a setting, the safety of treating acidic wastewater is further improved.

[0046] In one embodiment, a stirrer is provided in the lye storage tank 2, and the stirrer is configured to mix and stir the added solid alkali and water to form a uniform alkaline solution.

[0047] Specifically, instead of directly adding an alkaline solution into the lye storage tank 2, solid alkali and water are added. A stirrer is provided in the lye storage tank 2 to fully stir and mix the added solid alkali and water to form a uniform alkaline solution. Compared with the alkaline solution, using solid alkali is more convenient during storage and transportation, preventing accidents during storage and transportation.

[0048] In one embodiment, the alkaline solution is a sodium hydroxide solution.

[0049] Specifically, the alkaline solution is a sodium hydroxide solution. The sodium hydroxide solution has strong alkalinity and can quickly and completely neutralize acidic substances to form water and corresponding salts. Sodium hydroxide has high solubility in water and can form a high-concentration solution, which is convenient for metering and operation and suitable for large-scale industrial production processes. Compared with other alkaline substances, sodium hydroxide has a lower cost and is easier to obtain. Based on the above advantages, the sodium hydroxide solution is selected as the neutralizing agent.

[0050] In one embodiment, a stirrer is provided in the mixer 3, and the stirrer is configured to make the acid-base neutralization reaction occur sufficiently.

[0051] Specifically, an acid-base neutralization reaction occurs between the acidic wastewater and the alkaline solution in the mixer 3. By setting a stirrer, sufficient stirring can increase the reaction contact area, accelerate the reaction rate, and make the reaction more complete. The utilization rate of the alkaline solution is improved, and the addition of an excessive amount of alkaline solution due to incomplete reaction is prevented, thereby increasing the treatment cost of the acidic wastewater.

[0052] In one embodiment, the evaporator 4 is a steam evaporator.

[0053] Specifically, the evaporator 4 adopts a steam evaporator, and the mixed solution in the evaporator 4 is heated and evaporated by introducing steam. Since there are multiple heating and condensation processes in the production process of oxidized wax, a large amount of steam is generated. Therefore, the steam in the production process of oxidized wax can be introduced into the steam evaporator through a pipeline without adding a steam generator, efficiently utilizing the resources generated in the production process.

[0054] In one embodiment, the first power element 6 is an acid liquid delivery pump; and / or, the second power element 7 and the third power element 8 are infusion pumps; and / or, the fourth power element 9 is an induced draft fan.

[0055] Specifically, the first power element 6 is an acid liquid delivery pump, and the second power element 7 and the third power element 8 are infusion pumps, and both of these pumps are centrifugal pumps. The fourth power element 9 adopts an induced draft fan and is arranged on the outlet pipeline of the incinerator 5. In another embodiment, the fourth power element 9 can adopt a compressor and is arranged on the outlet pipeline of the evaporator 4.

[0056] In one embodiment, control valves are provided on the connecting pipelines between the acid liquid storage tank 1 and the alkali liquid storage tank 2 and the mixer 3, between the mixer 3 and the evaporator 4, and between the evaporator 4 and the incinerator 5. The control valves are configured to control the closing or opening of the pipelines.

[0057] Specifically, control valves are provided on the connecting pipelines between the acid storage tank 1 and the alkali storage tank 2 and the mixer 3, between the mixer 3 and the evaporator 4, and between the evaporator 4 and the incinerator 5. According to the progress of the acid-base neutralization reaction, the progress of tail gas evaporation and incineration, the control valves can control the closing or opening of the pipelines, preventing the excessive generation of tail gas from resulting in poor treatment effects. By timely adjusting the treatment progress, the reliability of acid wastewater treatment is ensured.

[0058] In one embodiment, any one of the acid storage tank 1, the alkali storage tank 2, the mixer 3, the evaporator 4, and the incinerator 5 is made of stainless steel.

[0059] Specifically, any component of the acid storage tank 1, the alkali storage tank 2, the mixer 3, the evaporator 4, and the incinerator 5 is made of stainless steel, specifically 304 stainless steel. Stainless steel has strong corrosion resistance and high-temperature resistance, and 304 stainless steel is the most common type of austenitic stainless steel, which has good corrosion resistance to the atmosphere, water, alkaline, salt solution, and various organic acids. Its chromium content is about 18%-20%, and the chromium oxide film can effectively prevent further oxidation, and it can maintain good corrosion resistance even in a humid or corrosive environment, extending the service life. Therefore, using 304 stainless steel for each component effectively improves the service life of the oxidized wax acid water treatment device.

[0060] In addition, for better understanding, the following combines the actual application scenarios of the oxidized wax acid water treatment device to elaborate on the treatment process of the acid wastewater disclosed in this document.

[0061] 1. The gaseous product generated by the reactor is cooled to form acid wastewater;

[0062] 2. Under the action of the first power element 6, the acid wastewater enters the acid storage tank 1;

[0063] 3. Solid alkali and water are added to the alkali storage tank 2 and are fully mixed under the action of a stirrer to form a uniform alkaline solution;

[0064] 4. Under the action of the second power element 7, the acid wastewater and the alkaline solution enter the mixer 3 and are fully mixed under the action of a stirrer to undergo an acid-base neutralization reaction;

[0065] 5. Under the action of the third power element 8, the mixed solution enters the evaporator 4 for evaporation to form tail gas;

[0066] 6. Under the action of the fourth power element 9, the tail gas enters the incinerator 5 for incineration;

[0067] 7. The tail gas detection element 10 detects that the tail gas concentration is less than the preset tail gas concentration allowed for emission, and the on-off valve 11 opens the outlet of the incinerator 5 to discharge it into the atmosphere.

[0068] The embodiments of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of technologies in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. An oxidized waxy acid water treatment device, characterized in that: The oxidized wax acid water treatment device comprises: An acid liquid storage tank (1), wherein the acid liquid storage tank (1) is configured to receive and store acid wastewater generated in an oxidized wax production system under the action of a first power element (6); An alkali solution storage tank (2), wherein the alkali solution storage tank (2) is configured to store an alkaline solution; a mixer (3), the mixer (3) being in communication with the acid solution storage tank (1) and the alkali solution storage tank (2), and being configured to receive the acid wastewater and the alkali solution under the action of a second power element (7) and to mix the acid wastewater with the alkali solution to generate an acid-base neutralization reaction to form a mixed solution; an evaporator (4), the evaporator (4) being in communication with the mixer (3) and being configured to receive the mixed solution from the mixer (3) under the action of a third power element (8) and to heat the mixed solution until the organic matter that has not been neutralized evaporates into tail gas; An incinerator (5), the incinerator (5) being in communication with the evaporator (4) and configured to receive and incinerate the exhaust gas generated by the evaporator (4) under the action of a fourth power element (9).

2. The oxidized waxy acid water treatment device according to claim 1, characterized in that: An exhaust gas detection element (10) is provided at the outlet of the incinerator (5), and the exhaust gas detection element (10) is configured to detect the exhaust gas concentration after incineration. A switch valve (11) is provided at the outlet of the incinerator (5), and the switch valve (11) is connected to the exhaust gas detection element (10) for communication, and is configured to close or open the outlet of the incinerator (5) based on the relationship between the actual exhaust gas concentration detected by the exhaust gas detection element (10) and the preset exhaust gas concentration allowed to be discharged.

3. The oxidized waxy acid water treatment device according to claim 2, characterized in that: When the actual exhaust gas concentration detected by the exhaust gas detection element (10) is less than the preset exhaust gas concentration allowed to be discharged, the outlet of the incinerator (5) is opened; When the actual exhaust gas concentration detected by the exhaust gas detection element (10) is greater than the preset exhaust gas concentration allowed to be discharged, the outlet of the incinerator (5) is closed.

4. The oxidized waxy acid water treatment device according to claim 3, characterized in that: The alkali solution storage tank (2) is provided with a stirrer, and the stirrer is configured to mix and stir the added solid alkali with water to form a uniform alkaline solution.

5. The oxidized waxy acid water treatment device according to claim 4, characterized in that: The alkaline solution is a sodium hydroxide solution.

6. The oxidized waxy acid water treatment device according to claim 5, characterized in that: The mixer (3) is provided with a stirrer, and the stirrer is configured to allow the acid-base neutralization reaction to occur fully.

7. The oxidized waxy acid water treatment device according to claim 6, characterized in that: The evaporator (4) is a steam evaporator.

8. The oxidized waxy acid water treatment device according to claim 7, characterized in that: The first power element (6) is an acid delivery pump; and / or, The second power element (7) and the third power element (8) are infusion pumps; and / or, The fourth power element (9) is an induced draft fan.

9. The oxidized waxy acid water treatment device according to claim 8, characterized in that: Control valves are provided on the connecting pipelines between the acid storage tank (1) and the alkali storage tank (2) and the mixer (3), on the connecting pipeline between the mixer (3) and the evaporator (4), and on the connecting pipeline between the evaporator (4) and the incinerator (5). The control valves are configured to control the closing or opening of the pipelines.

10. The oxidized waxy acid water treatment device according to claim 9, characterized in that: Any one of the acid solution storage tank (1), the alkali solution storage tank (2), the mixer (3), the evaporator (4) and the incinerator (5) is made of stainless steel.

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