阅读说明：本技术 硝基酚钠盐废水安全浓缩工艺及浓缩系统 (Safe concentration process and concentration system for nitrophenol sodium salt wastewater ) 是由 郑继宽 王建辉 周盛兵 杜成平 陈久钧 宁萍 于 2020-07-17 设计创作，主要内容包括：本发明涉及硝基邻二甲苯生产技术领域,公开了硝基酚钠盐废水安全浓缩工艺。本发明还提供了该中药组合物的制备方法。本发明还提供了硝基酚钠盐废水安全浓缩系统,包括废水中转槽和浓缩釜,还包括废水高位槽、溢流盒和浓缩废水贮槽；所述浓缩釜包括釜体,所述釜体顶壁开设有入料口和出气口,所述釜体底壁开设有出料口；所述釜体侧壁还开设有入液口；所述浓缩釜的出料口与溢流盒底部通过管道相连通连接,所述溢流盒的底壁设置高于浓缩釜内蛇管的顶端。本发明可以安全高效的对硝基酚钠盐废水进行浓缩处理,避免造成安全意外。(The invention relates to the technical field of production of nitro-o-xylene, and discloses a safe concentration process of nitrophenol sodium salt wastewater. The invention also provides a preparation method of the traditional Chinese medicine composition. The invention also provides a safe concentration system for the nitrophenol sodium salt wastewater, which comprises a wastewater transfer tank, a concentration kettle, a wastewater head tank, an overflow box and a concentrated wastewater storage tank; the concentration kettle comprises a kettle body, wherein a feeding port and an air outlet are formed in the top wall of the kettle body, and a discharging port is formed in the bottom wall of the kettle body; a liquid inlet is also formed in the side wall of the kettle body; the discharge gate of concentrated cauldron is linked together with overflow box bottom through the pipeline and is connected, the diapire setting of overflow box is higher than the top of coil in the concentrated cauldron. The invention can safely and efficiently carry out concentration treatment on the sodium nitrophenolate wastewater, and avoids causing safety accidents.)

1. The safe concentration process of nitrophenol sodium salt wastewater is characterized by comprising the following steps of:

a1: vacuum concentrating sodium phenolate wastewater by using workshop residual steam to remove 30-40% of raw water to obtain pre-concentrated sodium phenolate wastewater, and conveying the pre-concentrated sodium phenolate wastewater to a wastewater pool for storage;

a2: conveying the sodium phenolate wastewater which is pre-concentrated into a wastewater transfer tank (1), pumping the sodium phenolate wastewater from the wastewater transfer tank (1) into a wastewater elevated tank (3), and conveying the sodium phenolate wastewater which is pre-concentrated in the wastewater elevated tank (3) into a concentration kettle (2) for concentration; the concentrated sodium phenolate wastewater flows out to the overflow box (4), and the height of the liquid level in the overflow box (4) and the liquid level in the concentration kettle (2) is always kept the same;

a3: and the sodium phenolate wastewater after concentration in the overflow box (4) is conveyed to a concentrated wastewater storage tank (5) for uniform treatment.

2. The safe concentration process of the nitrophenol sodium salt wastewater as claimed in claim 1, wherein the pre-concentrated sodium phenolate wastewater in the wastewater head tank (3) in the step A2 is metered by a flowmeter and stably added into the concentration kettle (2), and the flow rate of the pre-concentrated sodium phenolate wastewater entering the concentration kettle (2) is controlled to be 2-2.5 t/h.

3. The safe concentration process of the sodium nitrophenolate wastewater as claimed in claim 1, wherein the temperature in the concentration kettle (2) in the step A2 is set to be 55-107 ℃.

4. The safe concentration process of the nitrophenol sodium salt wastewater as claimed in claim 1, wherein the waste gas generated by concentration in the step A2 is delivered to a condenser (6) through a gas-liquid separator (8), the waste gas is condensed into liquid in the condenser (6), a small part of the waste gas is delivered back to the concentration kettle (2), and a large part of the waste gas is delivered to a condensate storage tank (7) for uniform treatment; the liquid separated by the gas-liquid separator (8) is conveyed back to the concentration kettle (2).

5. The safe concentration process of nitrophenol sodium salt wastewater as claimed in claim 1, wherein the concentrated wastewater storage tank (5) in the step A3 is insulated with hot water, and the insulation temperature is set to 80-90 ℃.

6. The safe concentration system of nitrophenol sodium salt wastewater as claimed in any one of claims 1 to 5, comprising a wastewater transferring tank (1) and a concentration kettle (2), further comprising a wastewater elevated tank (3), an overflow box (4) and a concentrated wastewater storage tank (5); the concentration kettle (2) comprises a kettle body, the top wall of the kettle body is provided with a feeding port (201) and an air outlet (202), and the bottom wall of the kettle body is provided with a discharging port (203); a liquid inlet (205) is formed in the side wall of the kettle body; the discharge hole (203) of the concentration kettle (2) is communicated and connected with the bottom of the overflow box (4) through a pipeline, and the bottom wall of the overflow box (4) is higher than the top end of a coil in the concentration kettle (2).

7. The safe concentration system of nitrophenol sodium salt wastewater as claimed in claim 6, wherein said concentration kettle (2) is further connected with a condenser (6), and the gas outlet (202) on the top wall of said concentration kettle (2) is connected with the inlet of the condenser (6) through a pipeline; the outlet of the condenser (6) is communicated and connected with the liquid inlet (205) of the concentration kettle (2) through a pipeline; the feed inlet (201) department of concentrated cauldron (2) is provided with the inductor, the exit of waste water elevated tank (3) is provided with first induction controller, condenser (6) export is provided with second induction controller, inductor, first induction controller and second induction controller electricity are connected.

8. The safe concentration system of the nitrophenol sodium salt wastewater as claimed in claim 6, wherein the condenser (6) is further connected with a condensate storage tank (7), and the outlet of the condenser (6) is connected with the condensate storage tank (7) through a pipeline in a communication way; still be connected with vapour and liquid separator (8) between concentrated cauldron (2) and condenser (6), vapour and liquid separator (8) separation outlet is connected through the pipeline with the income liquid mouth (205) of concentrated cauldron (2).

9. The safe concentration system for the sodium nitrophenolate wastewater as claimed in claim 6, wherein an outlet of the wastewater transfer tank (1) is communicated and connected with an inlet of the wastewater elevated tank (3) through a pipeline; the outlet of the wastewater elevated tank (3) is communicated and connected with the feed inlet (201) of the concentration kettle (2) through a pipeline; the discharge hole (203) on the bottom wall of the concentration kettle (2) is communicated and connected with the inlet on the bottom wall of the overflow box (4) through a pipeline; the outlet of the overflow box (4) is communicated and connected with the inlet of the concentrated waste water storage tank (5) through a pipeline.

10. The nitrophenol sodium salt wastewater safety concentration system of claim 6, wherein the concentrated wastewater storage tank (5) is further connected with a hot water storage tank (9), the outer wall of the concentrated wastewater storage tank (5) is provided with a jacket, the outlet of the hot water storage tank (9) is connected with the inlet of the jacket through a pipeline, and the outlet of the jacket is connected with the inlet of the hot water storage tank (9) through a pipeline.

Technical Field

The invention relates to the technical field of production of nitro-o-xylene, and particularly relates to a safe concentration process and a concentration system for nitrophenol sodium salt wastewater.

Background

The method comprises the steps of firstly concentrating waste water in an adjacent tower condenser and a middle tower condenser by using waste heat, then directly conveying the concentrated mother liquor to an incinerator for incineration treatment, further improving the concentration degree of the nitrophenol sodium salt waste water due to high water content, and then conveying the waste water to the incineration process for incineration, so that the consumption cost is low and the treatment capacity can be improved.

At present, when the p-nitrophenol sodium salt wastewater is further concentrated, in order to improve the concentration efficiency, the temperature is higher during concentration, excessive concentration is easy to cause dry burning, and potential safety hazards exist.

Disclosure of Invention

The invention aims to provide a safe concentration process for nitrophenol sodium salt wastewater, which can be used for safely and efficiently concentrating the nitrophenol sodium salt wastewater and avoid safety accidents.

The invention aims to provide a safe concentration system for nitrophenol sodium salt wastewater, which can be used for safely and efficiently concentrating the nitrophenol sodium salt wastewater and avoid safety accidents.

The embodiment of the invention is realized by the following steps:

the safe concentration process of nitrophenol sodium salt wastewater comprises the following steps:

a1: vacuum concentrating sodium phenolate wastewater by using workshop residual steam to remove 30-40% of raw water to obtain pre-concentrated sodium phenolate wastewater, and conveying the pre-concentrated sodium phenolate wastewater to a wastewater pool for storage;

a2: conveying the sodium phenolate wastewater which is pre-concentrated into a wastewater transfer tank, pumping the sodium phenolate wastewater from the wastewater transfer tank into a wastewater elevated tank, and conveying the sodium phenolate wastewater which is pre-concentrated in the wastewater elevated tank into a concentration kettle for concentration; the concentrated sodium phenolate wastewater flows out of the overflow box, and the liquid level in the overflow box and the liquid level in the concentration kettle are always kept the same;

a3: and conveying the sodium phenolate wastewater after the concentration in the overflow box into a concentrated wastewater storage tank for uniform treatment.

Further, the pre-concentrated sodium phenolate wastewater in the wastewater head tank in the step A2 is metered by a flowmeter and stably added into a concentration kettle, and the flow rate of the pre-concentrated sodium phenolate wastewater entering the concentration kettle is controlled to be 2-2.5 t/h.

Further, the temperature in the concentration kettle in the step A2 is set to be 55-107 ℃.

Further, the waste gas generated in the concentration in the step A2 is conveyed to a condenser through a gas-liquid separator, the waste gas is condensed into liquid in the condenser, a small part of the liquid is conveyed back to the concentration kettle, and a large part of the liquid is conveyed to a condensate storage tank for uniform treatment; and liquid separated by the gas-liquid separator is conveyed back to the concentration kettle.

Further, the concentrated wastewater storage tank in the step A3 is insulated by hot water, and the insulation temperature is set to be 80-90 ℃.

Firstly, concentrating 30-40% of water in the wastewater, and contributing to improving the subsequent concentration efficiency of the wastewater; the concentrated sodium phenolate wastewater flows into the overflow box, the liquid level in the overflow box and the liquid level in the concentration kettle are always kept the same, the waste liquid in the concentration kettle cannot be completely discharged, the safety accident caused by dry burning in the concentration kettle is avoided, and the safety accident caused by the fact that the sodium phenolate is separated out from the waste liquid in the concentration process due to overhigh temperature and the sodium phenolate contacts with high temperature to cause burning is avoided; waste gas is condensed into liquid in the condenser to in the fractional delivery returns concentrated cauldron, can regulate and control the temperature in the concentrated cauldron, avoid the high temperature to cause safe accident, and can control concentrated degree through the volume that control condensate liquid carried to return to in the concentrated cauldron.

The safe concentration system for the nitrophenol sodium salt wastewater comprises a wastewater transfer tank, a concentration kettle, a wastewater head tank, an overflow box and a concentrated wastewater storage tank; the concentration kettle comprises a kettle body, wherein a feeding port and an air outlet are formed in the top wall of the kettle body, and a discharging port is formed in the bottom wall of the kettle body; a liquid inlet is also formed in the side wall of the kettle body; the discharge gate of concentrated cauldron is linked together with overflow box bottom through the pipeline and is connected, the diapire setting of overflow box is higher than the top of coil in the concentrated cauldron.

Further, the concentration kettle is also connected with a condenser, and an air outlet on the top wall of the concentration kettle is communicated and connected with an inlet of the condenser through a pipeline; the outlet of the condenser is communicated and connected with the liquid inlet of the concentration kettle through a pipeline; the feed inlet department of concentrated cauldron is provided with the inductor, the exit in waste water elevated tank is provided with first induction controller, the condenser export is provided with second induction controller, inductor, first induction controller and second induction controller electricity are connected.

Furthermore, the condenser is also connected with a condensate storage tank, and an outlet of the condenser is communicated and connected with the condensate storage tank through a pipeline; and a gas-liquid separator is connected between the concentration kettle and the condenser, and a separation outlet of the gas-liquid separator is communicated and connected with a liquid inlet of the concentration kettle through a pipeline.

Further, an outlet of the wastewater transfer tank is communicated and connected with an inlet of the wastewater high-level tank through a pipeline; the outlet of the wastewater elevated tank is communicated and connected with the feed inlet of the concentration kettle through a pipeline; the discharge hole of the bottom wall of the concentration kettle is communicated and connected with the inlet of the bottom wall of the overflow box through a pipeline; the outlet of the overflow box is communicated and connected with the inlet of the concentrated wastewater storage tank through a pipeline.

Furthermore, the concentrated wastewater storage tank is also connected with a hot water storage tank, the outer wall of the concentrated wastewater storage tank is provided with a jacket, the outlet of the hot water storage tank is communicated and connected with the inlet of the jacket through a pipeline, and the outlet of the jacket is communicated and connected with the inlet of the hot water storage tank through a pipeline.

Further, the pipelines are made of carbon steel or stainless steel.

Has the advantages that:

according to the invention, the concentration kettle and the overflow box which are communicated with each other at the bottoms are arranged to form the circulator, the liquid level heights in the concentration kettle and the overflow box are always kept the same according to the principle of the circulator, waste liquid in the concentration kettle cannot be completely discharged, safety accidents caused by dry burning in the concentration kettle can be avoided, and the sodium nitrophenolate wastewater can be efficiently and safely concentrated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a nitrophenol sodium salt wastewater safety concentration system provided by the embodiment of the invention;

fig. 2 is a cross-sectional view of a thickening tank and overflow box provided by an embodiment of the present invention.

Icon: 1-wastewater transfer tank, 2-concentration kettle, 201-material inlet, 202-gas outlet, 203-material outlet, 204-heating coil pipe, 205-liquid inlet, 3-wastewater head tank, 4-overflow box, 5-concentrated wastewater storage tank, 6-condenser, 7-condensate storage tank, 8-gas-liquid separator and 9-hot water storage tank.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

The safe concentration process and the concentration system for nitrophenol sodium salt wastewater provided by the embodiment of the invention are specifically explained below.