CN205035103U - Device of low -boiling -point substance in waste water is adopted to continuous separation natural gas and shale air to open - Google Patents
Device of low -boiling -point substance in waste water is adopted to continuous separation natural gas and shale air to open Download PDFInfo
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- CN205035103U CN205035103U CN201520737429.9U CN201520737429U CN205035103U CN 205035103 U CN205035103 U CN 205035103U CN 201520737429 U CN201520737429 U CN 201520737429U CN 205035103 U CN205035103 U CN 205035103U
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Abstract
The utility model discloses a device of low -boiling -point substance in waste water is adopted to continuous separation natural gas and shale air to open, the device includes the circulating pump that becomes the circulation system through the tube coupling, the heater, evaporimeter and condenser, the evaporimeter includes evaporating pot and the vertical segregation section that is located the evaporating pot top, it is provided with delivery port and the export of tank bottoms liquid on air inlet and the diapire to be provided with on the lateral wall of evaporating pot, the top of vertical segregation section is provided with the gas outlet and is provided with the material import on liquid mouth and the lateral wall with returning, the inside of evaporating pot is provided with the central honeycomb duct of being connected with the delivery port, evaporating pot upper portion is provided with silk screen mass transfer ware, the heater is connected through the cocycle pipe and the air inlet of evaporating pot and be connected with the delivery port of evaporating pot through lower circulating pipe, and the circulating pump setting is under on the circulating pipe, the condenser is connected with the gas outlet of vertical segregation section through last back flow and be connected with time liquid mouth of vertical segregation section through lower back flow, is provided with the low -boiling -point substance on the lower back flow and exports.
Description
Technical field
The utility model relates to the technical field of Sweet natural gas and shale gas exploitation wastewater treatment, more particularly, relates to one and is continuously separated low-boiling-point substance device in Sweet natural gas and shale gas exploitation waste water.
Background technology
A large amount of waste water can be produced in Sweet natural gas and shale gas recovery process, due to subterranean oil gas reservoir and rock stratum long-term co-existence, generally all dissolving in or be mixed into the components such as bulk petroleum class, soluble salt, suspended substance in this kind of waste water, is brine waste.In addition, in gas production and collect in defeated process and often need to add the chemical assistants such as foam discharging agent, inhibiter, Scale inhibitors, recovered water is formed more complicated and changeful, and show that petroleum content is high, volatile organic compound content is high, suspension content is high and salinity high.If directly discharge, can cause very big pollution to wellblock periphery.
The domestic zero release comprehensive treating process for sulfur Gas Fields recovered water, mainly by means of the multiple-effect evaporation desalination process of salt chemical engineering specialty, has begun to take shape the gas field recovered water comprehensive treatment technique route to be evaporated to main process.
It is the low-boiling point material (abbreviation low-boiling-point substance) comprising large amount of organic and ammonia nitrogen that Sweet natural gas and shale gas are exploited the most unmanageable in waste water.At present, the domestic brine waste for high-boiling and low-boiling components content, the method and apparatus that there is no mature and reliable processes completely.For brine waste, the chlorion in the method recycling waste water of evaporative desalination can be adopted, but exploit in the evaporative desalination process of waste water at Sweet natural gas and shale gas, a large amount of low-boiling-point organic compound and ammonia nitrogen enter in water of condensation along with evaporation, cause water of condensation not up to standard, can not discharge more can not reuse.What have adopts oxidation or other method organics removal in early stage, but due to low-boiling point material in organic constituent in the majority, after entering evaporative desalination system, still containing large amount of organic and ammonia nitrogen in water of condensation, cannot be up to standard.
Therefore, need a kind of new separating device of exploitation and separation method badly, a large amount of low-boiling-point organic compound and ammonia nitrogen to be separated from Sweet natural gas and shale gas exploitation waste water.
Utility model content
In order to solve problems of the prior art, the purpose of this utility model is to provide and a kind ofly realizes the device that is continuously separated of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water.
The utility model provides a kind of device being continuously separated low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water, described device comprises the recycle pump being connected into circulating system by pipeline, well heater, vaporizer and condenser, described vaporizer comprises evaporating pot and is positioned at the vertical segregation section at evaporating pot top, the sidewall of described evaporating pot is provided with inlet mouth and diapire is provided with liquid outlet at the bottom of water outlet and tank, the top of described vertical segregation section is provided with air outlet and liquid return hole and sidewall is provided with material inlet, the inside of described evaporating pot is provided with the center thrust-augmenting nozzle be connected with described water outlet, described evaporating pot top is provided with silk screen mass transfer device, described well heater to be connected with the inlet mouth of described evaporating pot by upper circular tube and to be connected with the water outlet of described evaporating pot by lower circulation tube, and described recycle pump is arranged on lower circulation tube, described condenser is connected with the air outlet of described vertical segregation section by upper return line and is connected with the liquid return hole of described vertical segregation section by lower return line, described lower return line is provided with low-boiling-point substance outlet.
Be continuously separated an embodiment of the device of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water according to the utility model, described well heater comprises heating chamber and described heating chamber is provided with heating steam import and condensation-water drain.
Be continuously separated an embodiment of the device of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water according to the utility model, described condenser comprises condensing chamber and described condensing chamber is provided with entrance of cooling water, cooling water outlet and vacuum pump interface.
Be continuously separated an embodiment of the device of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water according to the utility model, the diapire of described evaporating pot be also provided with sewage draining exit, be provided with multilayer column plate in described vertical segregation section or be filled with filler.
Compared with prior art, the beneficial effects of the utility model comprise:
Device in the utility model is by heating in prior art and be evaporated to the structure that equipment (intermediate feed, bottom-heated, top condensation) integrally changes evaporating pot and evaporation segregation section external-heating forced circulation and condensed exterior into, more effectively energy-conservation and improve further the recovery of volatile low boiling component, the impellent of mass transfer process is the difference between equilibrium partial pressure that in the dividing potential drop of ammonia in gas and waste water, the concentration of ammonia is suitable; The mode simultaneously former intermittent type being separated low-boiling-point substance changes into and being continuously separated, operation of being more convenient for.Further, the utility model adopts the mode of fore-distillation to remove low-boiling-point substance for the higher Sweet natural gas of the low boiling mixture content such as organism and ammonia nitrogen and shale gas exploitation waste water, the water after process directly can enter evaporation and water of condensation up to standard after can discharge or reuse.
Accompanying drawing explanation
Fig. 1 shows the structural representation being continuously separated the device of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water according to the utility model exemplary embodiment.
Description of reference numerals:
Circulation tube under return line, 8-condenser, 9-silk screen mass transfer device, 10-center thrust-augmenting nozzle, 11-under 1-recycle pump, 2-well heater, 3-upper circular tube, 4-evaporating pot, the vertical segregation section of 5-, the upper return line of 6-, 7-;
Liquid outlet at the bottom of a-heating steam import, b-condensation-water drain, c-inlet mouth, d-water outlet, e-sewage draining exit, f-tank, g-material inlet, h-air outlet, i-liquid return hole, j-entrance of cooling water, k-cooling water outlet, the outlet of l-low-boiling-point substance, m-vacuum pump interface.
Embodiment
All features disclosed in this specification sheets, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this specification sheets (comprising any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
Wherein, described Sweet natural gas and shale gas exploitation waste water refer to the waste water produced in Sweet natural gas and shale gas recovery process, wherein containing materials such as a large amount of salt, organism and ammonia nitrogens.Described low-boiling-point substance refers to low-boiling point material, mainly comprises ammonia nitrogen and volatile organism, and this area adopts chemical oxygen demand COD as the how many index of the organic content weighed in water usually.
Fig. 1 shows the structural representation being continuously separated the device of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water according to the utility model exemplary embodiment.As shown in Figure 1, according to exemplary embodiment of the present utility model, described in be continuously separated the device of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water and comprise and connect into the recycle pump 1 of circulating system, well heater 2, vaporizer and condenser 8 by pipeline.Wherein, recycle pump 1 pumps into for the circulation realizing waste water, well heater 2 is for realizing preheating of waste water, vaporizer is used for carrying out fore-distillation to waste water and concentrating thus make a large amount of low-boiling-point substances from the effusion of vaporizer top, and condenser 8 obtains for carrying out escaping gas liquefying and gets rid of the tank deck liquid of enrichment low-boiling-point substance.
According to the utility model, described device is by existing heating and be evaporated to the structure that equipment (intermediate feed, bottom-heated, top condensation) integrally changes evaporating pot and evaporation segregation section external-heating forced circulation and condensed exterior into, more effectively energy-conservation, and improve the recovery of volatile organic constituent further.
Particularly, vaporizer comprises evaporating pot 4 and is positioned at the vertical segregation section 5 at evaporating pot 4 top, the sidewall of evaporating pot 5 be provided with inlet mouth c and diapire be provided with liquid outlet f at the bottom of water outlet d and tank, the top of vertical segregation section 5 is provided with air outlet h and liquid return hole i and sidewall is provided with material inlet g.The diameter of evaporating pot 4 is greater than the diameter of vertical segregation section 5, the height of evaporating pot 4 is less than the diameter of vertical segregation section 5, evaporating pot 4 can carry out further evaporation concentration to pre-warmed waste water, vertical segregation section 5 can extend duration of contact between air water and contact tightness degree, and the impellent utilizing the difference between equilibrium partial pressure that the concentration of ammonia in the dividing potential drop of ammonia in gas and waste water is suitable to be formed carries out mass transfer, enrichment entering in condenser is separated along with the up of gas to make lower boiling volatile organic matter and ammonia nitrogen.
The inside of evaporating pot 4 is provided with the center thrust-augmenting nozzle 10 be connected with water outlet d, and evaporating pot 4 top is provided with silk screen mass transfer device 9.Silk screen mass transfer device 9 to frothy water body interception foam, can improve water body purity; Compared with conventional evaporating pot, being provided with axial center thrust-augmenting nozzle 10 can make liquid short circuit temperature difference loss significantly decline thus increase the effective temperature difference of system, the fluid resistance of feed liquid circulating system also can be made significantly to reduce thus effective operation power consumption reducing recycle pump.Preferably, center thrust-augmenting nozzle 10 has funnelform inlet tube, and inlet tube is arranged on the central axis of evaporating pot 4.
According to an embodiment of the present utility model, the diapire of evaporating pot 4 is also provided with sewage draining exit e to carry out discharge and the process of dirt, is provided with multilayer column plate in vertical segregation section 5 or is filled with filler.Also namely, vertical segregation section 5 can be tray column structure or packing tower structure.
Particularly, waste water enters evaporation concentration in evaporating pot 4 after preheating in well heater 2, the steam produced enters vertical segregation section 5 from bottom to top, foam in water body is tackled through silk screen mass transfer device 9, in evaporating pot 4, the volatile organic constituent of lower boiling (COD) and ammonia nitrogen also enter vertical segregation section 5 thereupon together, and gas phase is more up moved, upper temp is lower, then water vapor condensation is liquid phase and successively level backflow.The gas phase risen and the liquid phase of decline carry out counter current contact, in two processes contacted, in decline liquid, most of lower boiling volatile components constantly shifts in gas phase, gas phase is more close to tower top, low boiling component concentration is wherein higher, difficulty volatilization organic constituent in stock liquid then refluxes along with decline liquid and residues in liquid at the bottom of tank, thus reaches the object of Component seperation.
Well heater 2 is connected with the inlet mouth c of evaporating pot 4 by upper circular tube 3 and is connected with the water outlet d of evaporating pot 4 by lower circulation tube 9, and recycle pump 1 is arranged on lower circulation tube 9.Condenser 8 is connected with the air outlet h of vertical segregation section 5 by upper return line 6 and is connected with the liquid return hole i of vertical segregation section 5 by lower return line 7, lower return line 7 is provided with low-boiling-point substance outlet l.
Wherein, well heater 2 comprises heating chamber and heating chamber is provided with heating steam import a and condensation-water drain b, the flow direction entering the waste water of well heater 2 is relative with the flow direction of heating steam, then waste water can realize preheating of waste water with heating steam heat exchange, waste steam after preheating enters evaporating pot 4, and the water of condensation obtained after heating steam condensation is then discharged by condensation-water drain b.Same, condenser 8 comprises condensing chamber and condensing chamber is provided with entrance of cooling water j, cooling water outlet k and vacuum pump interface m, the flow direction entering the steam of the enrichment low-boiling-point substance of condenser 8 is relative with the flow direction of water coolant, then the steam of enrichment low-boiling-point substance can realize the condensation of steam with water coolant heat exchange, the tank deck liquid of condensed enrichment low-boiling-point substance is discharged from low-boiling-point substance outlet 1, and the water coolant of intensification is then discharged from cooling water outlet k.
The using method and the principle that below in conjunction with Fig. 1, the utility model are continuously separated to the device of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water are specifically described.
By recycle pump 1, pending Sweet natural gas and shale gas exploitation waste water are squeezed into preheating in the heating chamber of well heater 2, waste steam after preheating enters further evaporation concentration in evaporating pot 4 through upper circular tube 3, lower boiling volatile organic matter (COD) and ammonia nitrogen rise as a vapor and pass through to evaporate segregation section 5, the steam of enrichment organism and ammonia nitrogen is entered in condenser 8 by air outlet h and upper return line 6 and is cooled to liquid phase, discharge from low-boiling-point substance outlet l, collect the tank deck liquid obtaining enrichment low-boiling-point substance; Wherein, the condensation got back at the bottom of the tank of evaporating pot 4 by multistage backflow in vertical segregation section of most liquid, sub-fraction liquid can be back in vertical segregation section 5 by lower return line 7 after condensation and be pooled at the bottom of the tank of evaporating pot 4 in condenser 8, the liquid collected in evaporating pot 4 continues to pump in heating chamber 2 by lower circulation tube 9 again and carries out circular treatment, liquid at the bottom of tank after up to standard then exports f by liquid at the bottom of tank and discharges, and collects and obtains substantially containing liquid at the bottom of low-boiling-point substance or the tank containing little amount low-boiling-point substance.
Wherein, start Sweet natural gas when being continuously separated and shale gas exploitation waste water can add in vaporizer by material inlet g, also can pump in well heater 2 with the lower circulation tube 9 that wouldn't be connected with evaporating pot 4 by recycle pump 1, namely can carry out afterwards being continuously separated process.
Utilize above-mentioned when being continuously separated the device of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water, Sweet natural gas and shale gas exploitation waste water, after described device is continuously separated, is collected from the outlet of described low-boiling-point substance the tank deck liquid that obtains enrichment low-boiling-point substance and obtain liquid at the bottom of tank from liquid outlet collection at the bottom of described tank.
Thinking of the present utility model is to adopt said apparatus first to carry out fore-distillation to Sweet natural gas and shale gas exploitation waste water, thus the effective separation realized low-boiling-point substance in waste water, make the waste water be separated after low-boiling-point substance to carry out the process such as multiple-effect evaporation desalination further, and then obtain water of condensation up to standard.
Preferably, before Sweet natural gas and shale gas exploitation waste water are continuously separated, first Sweet natural gas and shale gas exploitation waste water are removed to the pre-treatment of suspended substance, obtain pretreated Sweet natural gas and shale gas exploitation waste water.Particularly, in Sweet natural gas and shale gas exploitation waste water, sodium hydroxide is added and sodium carbonate mixed precipitation takes off calcium-magnesium removing and suspended substance.
In the process be continuously separated, the Heating temperature of control heater is 55 ~ 130 DEG C, and the temperature controlling evaporating pot and vertical segregation section is 50 ~ 120 DEG C, and reflux ratio is 2:1 ~ 20:1.
After the tank deck liquid obtaining liquid and enrichment low-boiling-point substance at the bottom of tank, just can carry out follow-up process to it respectively.Such as, liquid at the bottom of tank is carried out multiple-effect evaporation and obtain water of condensation up to standard, salt slurry, by the re-injection of tank deck liquid or reprocessing, wherein, reclaim or discharge described water of condensation up to standard, dehydrate described salt slurry.
After adopting device of the present utility model waste water first carrying out fore-distillation to Sweet natural gas and shale gas exploitation, effectively can be separated low-boiling-point substance wherein, wherein, low-boiling-point substance (comprising ammonia nitrogen and the volatile COD) content in described tank deck liquid accounts for more than 90% of low-boiling-point substance total amount in Sweet natural gas and shale gas exploitation waste water.
Further the device being continuously separated low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water of the present utility model is described below in conjunction with concrete example.
Example 1:
With the Natural gas extraction waste water of water-quality guideline shown in table 1 for raw material, first add NaOH and Na wherein
2cO
3remove calcium, magnesium and suspended substance.In the device shown in Fig. 1, be continuously pumped into pretreated Natural gas extraction waste water, control pressure in vaporizer with the temperature of vaporizer be 50 DEG C, reflux ratio for 2:1, carry out being continuously separated process.
Run after 8 hours, stop being continuously separated process, collect liquid at the bottom of tank deck liquid and tank respectively.Wherein, in tank deck liquid ammonia nitrogen and organic content higher, biochemical process or chemical method can be adopted to process further; Liquid at the bottom of tank then directly can enter multiple-effect evaporation, and evaporation gained water of condensation can qualified discharge or reuse.
The water-quality constituents of table 1 Natural gas extraction waste water
| Sample name | COD(mg/L) | Ammonia nitrogen (mg/L) | Cl -(g/L) | pH |
| Raw material | 834 | 69 | 27.6 | 11.0 |
Get liquid at the bottom of tank and carry out multi-effect vacuum evaporation, controlling boiling point is more than 50 DEG C, concentrates and analyses salt, collect water of condensation simultaneously, and discharge salt slurry enters and dehydrates, and the water-quality constituents of each section of water outlet is in table 2.
The water-quality constituents of each section of water outlet in this example of table 2
As can be seen from result in table 2, after being continuously separated low-boiling-point substance, low-boiling-point organic compound and ammonia nitrogen are enriched in tank deck liquid in a large number, high boiling point organic compound and salt are stayed in liquid at the bottom of tank and are also finally enriched in liquid at the bottom of tank, at the bottom of tank, liquid evaporation gained condensation Organic substance in water, ammonia nitrogen and salts contg are extremely low, can reach emission standard completely.Also namely a large amount of lower boiling volatile components has entered in a small amount of tank deck liquid, is easy to focus on.And in liquid at the bottom of tank residual basic be not volatile components, then make it enter multiple-effect evaporation processing section, water of condensation up to standard can be obtained and carry out harmless recovery or discharge.
In sum, the utility model apparatus structure is simple, easy handling, equipment energy consumption are low and the process range of method is wide, can more than 90% be reached to the clearance of low-boiling-point substance (comprising ammonia nitrogen and volatile COD), be conducive to realizing effective separation of low boiling point component and the recycle of waste water in Sweet natural gas and shale gas exploitation waste water (brine waste), there is higher environmental protection and economic worth.
The utility model is not limited to aforesaid embodiment.The utility model expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (4)
1. be continuously separated the device of low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water, it is characterized in that, described device comprises and connects into the recycle pump of circulating system, well heater, vaporizer and condenser by pipeline,
Described vaporizer comprises evaporating pot and is positioned at the vertical segregation section at evaporating pot top, the sidewall of described evaporating pot is provided with inlet mouth and diapire is provided with liquid outlet at the bottom of water outlet and tank, the top of described vertical segregation section is provided with air outlet and liquid return hole and sidewall is provided with material inlet, the inside of evaporating pot is provided with the center thrust-augmenting nozzle be connected with water outlet, and evaporating pot top is provided with silk screen mass transfer device;
Described well heater to be connected with the inlet mouth of described evaporating pot by upper circular tube and to be connected with the water outlet of described evaporating pot by lower circulation tube, and described recycle pump is arranged on lower circulation tube;
Described condenser is connected with the air outlet of described vertical segregation section by upper return line and is connected with the liquid return hole of described vertical segregation section by lower return line, described lower return line is provided with low-boiling-point substance outlet.
2. the device being continuously separated low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water according to claim 1, it is characterized in that, described well heater comprises heating chamber and described heating chamber is provided with heating steam import and condensation-water drain.
3. the device being continuously separated low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water according to claim 1, it is characterized in that, described condenser comprises condensing chamber and described condensing chamber is provided with entrance of cooling water, cooling water outlet and vacuum pump interface.
4. the device being continuously separated low-boiling-point substance in Sweet natural gas and shale gas exploitation waste water according to claim 1, is characterized in that, the diapire of described evaporating pot is also provided with sewage draining exit, be provided with multilayer column plate or be filled with filler in described vertical segregation section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520737429.9U CN205035103U (en) | 2015-09-22 | 2015-09-22 | Device of low -boiling -point substance in waste water is adopted to continuous separation natural gas and shale air to open |
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| CN201520737429.9U CN205035103U (en) | 2015-09-22 | 2015-09-22 | Device of low -boiling -point substance in waste water is adopted to continuous separation natural gas and shale air to open |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110396A (en) * | 2015-09-22 | 2015-12-02 | 自贡市轻工业设计研究院有限责任公司 | Method and device for continuously separating low-boiling point substances in wastewater produced by extraction of natural gas and shale gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110396A (en) * | 2015-09-22 | 2015-12-02 | 自贡市轻工业设计研究院有限责任公司 | Method and device for continuously separating low-boiling point substances in wastewater produced by extraction of natural gas and shale gas |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Zigong great energy saving and Environmental Protection Engineering Co., Ltd. Assignor: Zigong Light Industry Design and Research Co., Ltd. Contract record no.: 2016510000031 Denomination of utility model: Device of low -boiling -point substance in waste water is adopted to continuous separation natural gas and shale air to open Granted publication date: 20160217 License type: Common License Record date: 20161208 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |