阅读说明：本技术 高盐高浓含氯废水蒸汽再循环高温热氧化设备与工艺 (High-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment and process ) 是由 马晓钟 高松 刘永启 于 2019-09-06 设计创作，主要内容包括：本发明提到的一种高盐高浓含氯废水蒸汽再循环高温热氧化设备与工艺,其技术方案是：氧化装置由换向阀、换热器、左右蓄热室、氧化室自下而上连接安装,构成废水氧化部分,共设置两台蒸馏釜,交替投入运行,构成废水蒸馏部分；废水池、废水供给泵顺次通过管道连接于蒸馏釜,通过将蒸馏釜、废水循环泵、氧化装置换热器通过管道及管道附件顺次相连接形成废水封闭循环系统,构成强制废水循环部分。有益效果是：本发明实现有机物超稀薄氧化或燃烧,有机物分解彻底,并防止了排气中二次污染物形成,同时将废水中的盐分蒸馏分离出来,通过蒸馏,将废水中所含高、低沸点的有机物分离后,分别通过氧化和喷烧进行销毁,保证设备系统安全运行。(The invention provides high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment and a process, and the technical scheme is as follows: the oxidation device is formed by connecting and installing a reversing valve, a heat exchanger, a left regenerator, a right regenerator and an oxidation chamber from bottom to top to form a wastewater oxidation part, and two distillation kettles are arranged and alternately put into operation to form a wastewater distillation part; the wastewater pool and the wastewater supply pump are sequentially connected with the distillation still through pipelines, and the distillation still, the wastewater circulating pump and the oxidation device heat exchanger are sequentially connected through pipelines and pipeline accessories to form a wastewater closed circulating system, so that a forced wastewater circulating part is formed. The beneficial effects are that: the invention realizes the ultra-thin oxidation or combustion of organic matters, decomposes the organic matters thoroughly, prevents the formation of secondary pollutants in exhaust gas, simultaneously distills and separates out the salt in the wastewater, separates the organic matters with high boiling point and low boiling point in the wastewater through distillation, and destroys the organic matters through oxidation and spray firing respectively, thereby ensuring the safe operation of an equipment system.)

1. A high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation device is characterized in that: the device comprises an oxidation device, a distillation still, a fan (15), an air preheater (17), an ejector (18), a wastewater circulating pump, a wastewater supply pump, a condensate tank (21), a wastewater pool (16) and an exhaust chimney (31), wherein the oxidation device is formed by connecting and installing a reversing valve (24), a heat exchanger (25), a left heat storage chamber (33), a right heat storage chamber (26) and an oxidation chamber (30) from bottom to top to form a wastewater oxidation part; the distillation still is provided with a crystal paddle discharge valve and a high boiling point organic matter discharge valve, and two or more distillation still can be arranged to alternately put into operation to form a wastewater distillation part; the wastewater pool (16) and the wastewater supply pump are sequentially connected with the distillation still through pipelines, and the distillation still, the wastewater circulating pump and the heat exchanger (25) of the oxidation device are sequentially connected through pipelines and pipeline accessories to form a wastewater closed circulating system to form a forced wastewater circulating part; the fan (15), the air preheater (17), the ejector (18) and the reversing valve (24) of the oxidation device are sequentially connected through pipelines and pipeline accessories to form a gas inlet and operation safety monitoring part; the wastewater oxidation part, the wastewater distillation part, the forced wastewater circulation part and the air inlet and operation safety monitoring part are connected and communicated by pipelines and pipeline accessories to form the high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment and process.

2. The high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment as claimed in claim 1, which is characterized in that: the oxidation chamber (30) is provided with a left combustor (32) and a right combustor (28), the inner cavity of the oxidation chamber is divided into a left heat storage chamber (33) and a right heat storage chamber (26), a heat exchanger (25) is arranged below the left heat storage chamber (33) and the right heat storage chamber (26), and a reversing valve (24) is arranged below the heat exchanger (25).

3. the high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment as claimed in claim 2, which is characterized in that: an oxidation chamber temperature sensor (29) is arranged on the oxidation chamber (30); a left heat storage chamber temperature sensor (34) is arranged on the left heat storage chamber (33), and a right heat storage chamber temperature sensor (27) is arranged on the right heat storage chamber (26); the reversing valve (24) is provided with a reversing valve left temperature sensor (20) and a reversing valve right temperature sensor (23).

4. the high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment as claimed in claim 1, which is characterized in that: the wastewater distillation part is provided with two distillation kettles, each distillation kettle is provided with a steam temperature sensor, a liquid temperature sensor, a lower liquid temperature sensor, a crystal discharging paddle upper valve, a crystal discharging paddle lower valve and a high-boiling-point organic matter discharge valve, and the two distillation kettles are alternately put into operation according to the temperature condition in the distillation kettles; and the lower part of the distillation kettle is conical.

5. the high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment as claimed in claim 4, which is characterized in that: no. 1 stills (7) upside is equipped with No. 1 safety relief valve (2), No. 1 steam temperature sensor (3), No. 1 upper liquid temperature sensor (4), No. 1 level gauge (5), and well lower part is equipped with under No. 1 liquid temperature sensor (6) and No. 1 high boiling organic matter discharge valve (10), and the bottom is established ties and is equipped with on No. 1 row brilliant oar valve (8) and No. 1 row brilliant oar lower valve (9).

6. The high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment as claimed in claim 1, which is characterized in that: one end of the waste water pool (16) is connected to the two stills through a waste water pool outlet valve (14), and the other end is connected to the lower end of a reversing valve (24) through a condensate tank (21).

7. The high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment as claimed in claim 1, which is characterized in that: a fan (15) is arranged on one side of the air preheater (17), the upper end of the air preheater is connected with an exhaust chimney (31), and the other side of the air preheater is connected to a reversing valve (24) through an ejector (18); the upper part of the ejector (18) is connected to the tops of the two distillation kettles through a pipeline; preheating air and uniformly premixing the air and wastewater steam, and controlling the concentration within a reasonable concentration range.

8. a high-temperature thermal oxidation process for recycling high-salinity high-concentration chlorine-containing wastewater steam by adopting the equipment in any one of claims 1 to 7, which is characterized by comprising the following steps:

(1) And preparation work: filling 2 stills with wastewater, starting a first stills, starting a wastewater circulating pump, and putting a wastewater supply pump in a hot standby state;

(2) And starting up: starting a fan at low flow, starting a burner to heat an oxidation chamber and a heat accumulation chamber, and starting a reversing valve, wherein when the temperatures of the oxidation chamber and the heat accumulation chamber reach 1000 ℃ and 800 ℃ respectively, and steam is generated in a first distillation kettle, auxiliary fuel supply is gradually reduced, and after the steam is stably generated, the starting is successful;

(3) And normally operating: under the action of a fan, low-pressure water vapor and low-boiling organic volatile matters in the first distillation kettle are sent to a heat storage chamber by an ejector to be preheated, and heat is released by high-temperature oxidation in an oxidation chamber, the heat is retained by a heat storage ceramic body part on the leeward side, most of oxidation heat is exchanged to waste water by a heat exchanger, a waste water circulating pump sends saturated high-temperature waste water to the distillation kettle, and water vapor and low-boiling organic matters are produced; the oxidized exhaust gas continuously flows, and then air sent by the fan and wastewater sent by the wastewater supply pump are respectively heated; the temperature of finally discharged gas is only higher than that of ambient air and is not more than 70 ℃, the process is repeated in this way, the water and low-boiling-point organic matters in the wastewater are continuously evaporated at constant temperature, salt in the wastewater is crystallized and separated out, and high-boiling-point organic liquid is remained in a distillation kettle; the method comprises the following steps that a waste water supply pump continuously supplements original waste water to maintain the liquid level height of a distillation kettle, high-boiling-point organic liquid is accumulated more and more, after a certain time, when the temperature of liquid in the distillation kettle is measured to exceed a certain temperature, a first distillation kettle enters a liquid drainage period, and the distillation kettle is immediately switched to a second distillation kettle to work; discharging high-boiling-point organic liquid, and after the first distillation kettle finishes working, taking the high-boiling-point organic liquid as fuel to realize high-temperature oxidation heat release in an oxidation chamber by a burner; the two stills work alternately in such a way as to evaporate water, crystallize and separate out salt, and oxidize and decompose organic substances.

Technical Field

the invention relates to an environment protection process and equipment, in particular to high-temperature thermal oxidation equipment and process for recycling high-salinity high-concentration chlorine-containing wastewater steam.

Background

in 2015, in 2 months, the state respectively produces ten water regulations, if the water treatment industry forms a 2 trillion ~ level market according to the requirements of the regulations, the ecological environment of China is improved, the construction of beautiful China is significant, most of domestic sewage and general industrial sewage are treated by adopting a biochemical treatment process to achieve standard discharge, but the organic matter content reaches tens of thousands mg/L, the salt content is high, harmful components are complex, particularly, the waste water containing elements such as chlorine, benzene and the like or chemical wastewater and the like can form secondary pollution, the treatment cost is high (some is up to 2000 ~ 3000 yuan/ton), owners are difficult to bear, the phenomena of pit seepage discharge, rain sewage mixing discharge and steal discharge in the past sometimes occur, serious soil and water pollution are caused, environmental protection supervision and supervision are increased, the illegal discharge adverse phenomena are controlled, the waste water storage amount is large at present, the waste water society is a problem of headache due to the fact that the waste water which is treated by adopting a high ~ concentration process of RO and the traditional high ~ efficiency desalination process does not cause the pollution of high ~ concentration and low ~ concentration waste water generated by a traditional high ~ concentration desalination process.

Disclosure of Invention

the invention aims to provide high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment and process aiming at the defects in the prior art, organic matters contained in wastewater are used as energy, and the steam recycling high-temperature thermal oxidation process is adopted to treat the wastewater, so that the defects existing in the traditional mode are overcome, the purposes of recycling waste, saving energy and reducing the system operation cost are realized.

The invention provides a high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation device, which adopts the technical scheme that: the device comprises an oxidation device, a distillation still, a fan (15), an air preheater (17), an ejector (18), a wastewater circulating pump, a wastewater supply pump, a condensate tank (21), a wastewater pool (16) and an exhaust chimney (31), wherein the oxidation device is formed by connecting and installing a reversing valve (24), a heat exchanger (25), a left heat storage chamber (33), a right heat storage chamber (26) and an oxidation chamber (30) from bottom to top to form a wastewater oxidation part; the distillation still is provided with a crystal paddle discharge valve and a high boiling point organic matter discharge valve, and two or more distillation still can be arranged to alternately put into operation to form a wastewater distillation part; the wastewater pool (16) and the wastewater supply pump are sequentially connected with the distillation still through pipelines, and the distillation still, the wastewater circulating pump and the heat exchanger (25) of the oxidation device are sequentially connected through pipelines and pipeline accessories to form a wastewater closed circulating system to form a forced wastewater circulating part; the fan (15), the air preheater (17), the ejector (18) and the reversing valve (24) of the oxidation device are sequentially connected through pipelines and pipeline accessories to form a gas inlet and operation safety monitoring part; the wastewater oxidation part, the wastewater distillation part, the forced wastewater circulation part and the air inlet and operation safety monitoring part are connected and communicated by pipelines and pipeline accessories to form the high-salt high-concentration chlorine-containing wastewater steam recycling high-temperature thermal oxidation equipment and process.

Preferably, the oxidation chamber (30) is provided with a left burner (32) and a right burner (28), the inner cavity is divided into a left regenerative chamber (33) and a right regenerative chamber (26), a heat exchanger (25) is arranged below the left regenerative chamber (33) and the right regenerative chamber (26), and a reversing valve (24) is arranged below the heat exchanger (25).

Preferably, the oxidation chamber (30) is provided with an oxidation chamber temperature sensor (29); a left heat storage chamber temperature sensor (34) is arranged on the left heat storage chamber (33), and a right heat storage chamber temperature sensor (27) is arranged on the right heat storage chamber (26); the reversing valve (24) is provided with a reversing valve left temperature sensor (20) and a reversing valve right temperature sensor (23).

Preferably, the wastewater distillation part is provided with two distillation kettles, each distillation kettle is provided with a steam temperature sensor, a liquid temperature sensor, a lower liquid temperature sensor, a crystal discharging paddle upper valve, a crystal discharging paddle lower valve and a high-boiling-point organic matter discharge valve, and the two distillation kettles are alternately put into operation according to the temperature condition in the distillation kettles; and the lower part of the distillation kettle is conical.

Preferably, No. 1 stills (7) upside is equipped with No. 1 safety relief valve (2), No. 1 steam temperature sensor (3), No. 1 upper liquid temperature sensor (4), No. 1 level gauge (5), and well lower part is equipped with No. 1 lower liquid temperature sensor (6) and No. 1 high boiling organic matter discharge valve (10), and the bottom is established ties and is equipped with No. 1 and arranges brilliant oar upper valve (8) and No. 1 and arranges brilliant oar lower valve (9).

Preferably, one end of the waste water pool (16) is connected to the two distillation kettles through a waste water pool outlet valve (14), and the other end of the waste water pool is connected to the lower end of the reversing valve (24) through a condensed liquid tank (21).

preferably, one side of the air preheater (17) is provided with a fan (15), the upper end of the air preheater is connected with an exhaust chimney (31), and the other side of the air preheater is connected to a reversing valve (24) through an ejector (18); the upper part of the ejector (18) is connected to the tops of the two distillation kettles through a pipeline; preheating air and uniformly premixing the air and wastewater steam, and controlling the concentration within a reasonable concentration range.

The invention provides a high-temperature thermal oxidation process for recycling high-salt high-concentration chlorine-containing wastewater steam, which comprises the following steps of:

(1) And preparation work: filling 2 stills with wastewater, starting a first stills, starting a wastewater circulating pump, and putting a wastewater supply pump in a hot standby state;

(2) and starting up: starting a fan at low flow, starting a burner to heat an oxidation chamber and a heat accumulation chamber, and starting a reversing valve, wherein when the temperatures of the oxidation chamber and the heat accumulation chamber reach 1000 ℃ and 800 ℃ respectively, and steam is generated in a first distillation kettle, auxiliary fuel supply is gradually reduced, and after the steam is stably generated, the starting is successful;

(3) and normally operating: under the action of a fan, low-pressure water vapor and low-boiling organic volatile matters in the first distillation kettle are sent to a heat storage chamber by an ejector to be preheated, and heat is released by high-temperature oxidation in an oxidation chamber, the heat is retained by a heat storage ceramic body part on the leeward side, most of oxidation heat is exchanged to waste water by a heat exchanger, a waste water circulating pump sends saturated high-temperature waste water to the distillation kettle, and water vapor and low-boiling organic matters are produced; the oxidized exhaust gas continuously flows, and then air sent by the fan and wastewater sent by the wastewater supply pump are respectively heated; the temperature of finally discharged gas is only higher than that of ambient air and is not more than 70 ℃, the process is repeated in this way, the water and low-boiling-point organic matters in the wastewater are continuously evaporated at constant temperature, salt in the wastewater is crystallized and separated out, and high-boiling-point organic liquid is remained in a distillation kettle; the method comprises the following steps that a waste water supply pump continuously supplements original waste water to maintain the liquid level height of a distillation kettle, high-boiling-point organic liquid is accumulated more and more, after a certain time, when the temperature of liquid in the distillation kettle is measured to exceed a certain temperature, a first distillation kettle enters a liquid drainage period, and the distillation kettle is immediately switched to a second distillation kettle to work; discharging high-boiling-point organic liquid, and after the first distillation kettle finishes working, taking the high-boiling-point organic liquid as fuel to realize high-temperature oxidation heat release in an oxidation chamber by a burner; the two stills work alternately in such a way as to evaporate water, crystallize and separate out salt, and oxidize and decompose organic substances.

Compared with the prior art, the invention has the following beneficial effects:

1. the environmental protection effect is thorough: pre-mixing low boiling point organic matter and water azeotropic organic matter in waste water with air via distillation, homogenizing and homogeneous oxidation in high temperature oxidation bed at 1000 deg.c, distilling and separating high boiling point organic matter in waste water, atomizing and spraying to burn in high temperature oxidation bed at 1000 deg.c to convert organic matter into CO₂、H₂o and other harmless substances are discharged in a gas form; for example, the waste water containing partial chlorine, benzene and other elements is passed through the quenching heat exchanger in the oxidation device to avoid synthesizing di-alcohol in the oxidation exhaust processDioxin, salt in the waste water is distilled and separated and is treated separately;

2. The operation is safe and reliable: the method has the advantages that the method combines premixed combustion (oxidation) and diffusion spray combustion (oxidation) to treat organic matters in the wastewater, the organic matters with low boiling points in the wastewater are distilled out and premixed with air for oxidation, and the concentration of mixed gas is monitored by an online organic gas concentration sensor within a reasonable range, so that the safe oxidation of the premixed gas is guaranteed; the higher boiling organic matters in the wastewater are safely treated in a heat-storage oxidation chamber of an oxidation device by adopting an atomization spray burning mode, namely a mixing mode of diffusion burning and premixed oxidation. The two stills are alternately put into operation, and the concentration of the organic matter after the distillation steam and the air are mixed is controlled not to exceed the standard;

3. Good running economy: the waste water is treated to become clean gas and then discharged into the atmosphere, and the discharge temperature is lower than 80 ℃, so that the waste water is treated while the organic matter energy in the waste water is utilized, the equipment operation cost is reduced, and the total operation cost is less than 20% of the operation cost of the prior treatment technology.

Drawings

FIG. 1 is a schematic structural view of the present invention;

In the upper diagram: no. 1 steam valve 1, No. 1 safety relief valve 2, No. 1 steam temperature sensor 3, No. 1 upper liquid temperature sensor 4, No. 1 liquid level meter 5, No. 1 lower liquid temperature sensor 6, No. 1 distillation still 7, No. 1 crystal discharging paddle upper valve 8, No. 1 crystal discharging paddle lower valve 9, No. 1 high boiling point organic matter discharge valve 10, No. 1 waste water check valve 11, No. 1 waste water supply pump 12, No. 1 pre-pump filter 13, waste water tank outlet valve 14, fan 15, waste water tank 16, air preheater 17, ejector 18, organic gas concentration sensor 19, reversing valve left temperature sensor 20, condensate tank 21, reversing valve liquid discharge valve 22, reversing valve right temperature sensor 23, reversing valve 24, heat exchanger 25, right heat storage chamber 26, right heat storage chamber temperature sensor 27, right combustor 28, oxidation chamber temperature sensor 29, oxidation chamber 30, exhaust chimney 31, left combustor 32, Left regenerator 33, left regenerator temperature sensor 34, wastewater circulating pump pressure sensor 35, No. 1 wastewater circulating pump valve 36, No. 1 wastewater circulating pump 37, No. 2 wastewater circulating pump valve 38, No. 2 wastewater circulating pump 39, No. 2 steam valve 40, No. 2 safety relief valve 41, No. 2 steam temperature sensor 42, No. 2 upper liquid temperature sensor 43, No. 2 level gauge 44, No. 2 lower liquid temperature sensor 45, No. 2 still 46, No. 2 upper crystal discharging paddle valve 47, No. 2 lower crystal discharging paddle valve 48, No. 2 wastewater check valve 49, No. 2 wastewater supply pump 50, No. 2 pre-pump filter 51.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.