CN105668780A - Acidification quick-recovery anaerobic reaction system - Google Patents

Acidification quick-recovery anaerobic reaction system Download PDF

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CN105668780A
CN105668780A CN201410677677.9A CN201410677677A CN105668780A CN 105668780 A CN105668780 A CN 105668780A CN 201410677677 A CN201410677677 A CN 201410677677A CN 105668780 A CN105668780 A CN 105668780A
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water
egsb
magnetic valve
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CN105668780B (en
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于海
汪诚文
伍金伟
孙继涛
唐峰
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Tsinghua University
China Huanqiu Contracting and Engineering Corp
China Huanqiu Engineering Co Ltd
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Tsinghua University
China Huanqiu Engineering Co Ltd
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Abstract

The invention relates to the technical field of wastewater treatment and especially relates to an acidification quick-recovery anaerobic reaction system which includes two stages of EGSB reactors and an intermediate water tank. A water inlet end of the intermediate water tank is connected to a first-stage water outlet system and a water outlet end is communicated with a secondary water inlet. The water outlet of a reagent-adding regulation tank is communicated with a first-stage water inlet. A first backflow system is disposed in the middle-upper part of a reaction zone in the first-stage EGSB reactor, so that water flows back to the first-stage water inlet. A secondary backflow system is disposed in the middle-upper part of a reaction zone in the secondary EGSB reactor, wherein the backflow water is separated into two flows, one flows back to the secondary water inlet under the control of a second electromagnetic valve, and the other one flows back to the first-stage water inlet under the control of a third electromagnetic valve. The system achieves anaerobic biological treatment on high-organic-concentration coal-to-liquid Fischer-Tropsch synthesis wastewater, solves a problem that a high-load anaerobic reactor is liable to be acidified, and meanwhile provides technical support for treatment on similar wastewater.

Description

The fast quick-recovery anaerobic reaction system of acidifying
Technical field
The present invention relates to technical field of sewage, particularly relate to a kind of fast quick-recovery anaerobic reaction system of acidifying.
Background technology
Anaerobic Biotechnology because its energy consumption is low, load height, efficiency height and biogas can be produced and be widely used in trade effluent (particularly high concentrated organic wastewater) treatment process. EGSB reactor (expanded granular sludge bed) belongs to third generation high efficiency anaerobic reactor, EGSB reactor has bigger aspect ratio, and it is provided with out water cycle, while effectively improving upflow liquid velocity, play the effect of dilution water inlet, it is applicable to the waste water of the high organic content of process.
Coal liquifaction F-T synthesis waste water COD (chemical oxygen demand (COD)) concentration is up to 20000~40000mg/L, and quantity discharged is big, processing cost height, variation water quality is relatively big, and the process of F-T synthesis waste water has become an important factor of restriction coal liquifaction industry development. Because of the feature that F-T synthesis waste water has COD concentration height, variation water quality is big, it may also be useful to traditional EGSB reactor for treatment can exist load and increase suddenly, causes the problem of reactor acidifying.
Therefore, for above deficiency, the present invention provides a kind of fast quick-recovery anaerobic reaction system of acidifying.
Summary of the invention
(1) technical problem solved
The technical problem to be solved in the present invention is the problem that high organic substance content wastewater processing load is difficult to raising, the easy acidifying of reactor, and the problem that coal liquifaction F-T synthesis wastewater treatment difficulty is big.
(2) technical scheme
In order to solve the problems of the technologies described above, the present invention provides a kind of fast quick-recovery anaerobic reaction system of acidifying, it is characterized in that: comprise chemicals addition control pond, one-level EGSB reactor, two grades of EGSB reactors, intermediate pool, gas collector, electrical control system, the first magnetic valve, the 2nd magnetic valve and the 3rd magnetic valve, described one-level EGSB reactor is provided with one-level intake pump, one-level water-in, one-level triphase separator, one-level backflow system and primary effluent system; Described two grades of EGSB reactors are provided with two grades of intake pumps, two grades of water-ins, two grades of triphase separators, two grades of backflow systems and secondary effluent system; Described chemicals addition control pond is provided with one-level pH on-line computing model;Described chemicals addition control pond water outlet is connected with one-level water-in by the control of one-level intake pump; Described one-level EGSB reactor wall bottom is provided with two grades of pH on-line computing model; The feed-water end of described intermediate pool and primary effluent system connectivity, its water side is connected with two grades of water-ins by two grades of intake pump controls; Described one-level backflow Operation system setting top in one-level EGSB reactor reaction zone, described one-level backflow system passes through the first magnetic valve backwater to one-level water-in; Described two grades of backflow Operation system setting tops in two grades of EGSB reactor reaction zones, the backflow moisture two strands of described two grades of backflow systems, one water is back to two grades of water-ins by the 2nd solenoid control, and another strand of water is back to one-level water-in by the 3rd solenoid control; Described one-level triphase separator and two grades of triphase separators are separately positioned on one-level EGSB reactor and two grades of EGSB inside reactors, and gas collector is connected with one-level triphase separator and two grades of triphase separator outlet sides; Described electrical control system is connected with chemicals addition control pond, one-level pH on-line computing model, two grades of pH on-line computing model, the first magnetic valve, the 2nd magnetic valve, the 3rd magnetic valve and two grades of intake pumps respectively.
Wherein, described one-level EGSB reactor is identical with the volume of two grades of EGSB reactors, forms by reaction zone and settling region.
Wherein, the volume ratio of described reaction zone and settling region is 13:8, and described reaction zone aspect ratio is 16.25.
Wherein, described one-level EGSB reactor and two grades of EGSB reactors are anaeration in normal temperature reactor, and temperature of reaction is 33~37 DEG C.
Wherein, described chemicals addition control pond is provided with NaOH, NaHCO3、KH2PO4And NH4The dosing unit of Cl tetra-kinds of medicaments.
Wherein, described electrical control system feeds back according to the data of one-level pH on-line computing model, regulates the NaOH chemical feeding quantity in chemicals addition control pond.
Wherein, described electrical control system feeds back according to the data of two grades of pH on-line computing model, regulates the open and close of the first magnetic valve, the 2nd magnetic valve and the 3rd magnetic valve, the NaHCO in control two grading pump capacities and control chemicals addition control pond3Chemical feeding quantity.
(3) useful effect
The technique scheme tool of the present invention has the following advantages: the present invention utilizes two-stage EGSB reactor for treatment coal liquifaction F-T synthesis waste water, in EGSB reactor settling region, waste water is back to water-in, can organic concentration in diluting reactor, it is to increase reactor for treatment ability, ensures effluent quality; All be provided with pH on-line monitoring system in chemicals addition control pond and one-level EGSB reactor, can Timeliness coverage reactor acidifying problem, and the control by electrical control system, makes corresponding in time, takes emergency measures; Two-stage EGSB reactor can successfully manage reactor acidifying problem, adopts bigger volumetric loading, reduces reactor floor space, saves construction cost; Two-stage EGSB reactor can produce a large amount of biogas, and biogas can be used for generating and produces economic benefit.
Accompanying drawing explanation
Fig. 1 is a kind of fast quick-recovery anaerobic reaction system schematic of acidifying provided by the invention.
1: chemicals addition control pond; 21: one-level pH on-line computing model; 22: two grades of pH on-line computing model; 31: one-level intake pump; 32: two grades of intake pumps; 41: one-level water-in; 42: two grades of water-ins; 51 one-level EGSB reactors; 52: two grades of EGSB reactors; 61: one-level triphase separator; 62: two grades of triphase separators; 71: one-level backflow system; 72: two grades of backflow systems; 81: primary effluent system;82: secondary effluent system 91: the first magnetic valve; 92: the two magnetic valves; 93: the three magnetic valves; 10 intermediate pool; 11: gas collector; 12 electrical control systems.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail. Following examples are for illustration of the present invention, but are not used for limiting the scope of the invention.
With reference to shown in Fig. 1, the fast quick-recovery anaerobic reaction system of the acidifying of the present invention comprises chemicals addition control pond 1, one-level EGSB reactor 51, two grades of EGSB reactors 52, intermediate pool 10, gas collector 11, electrical control system 12, first magnetic valve 91, the 2nd magnetic valve 92 and the 3rd magnetic valve 93, one-level EGSB reactor 51 and is provided with one-level intake pump 31, one-level water-in 41, one-level triphase separator 61, one-level backflow system 71 and primary effluent system 81; Described two grades of EGSB reactors 52 are provided with two grades of intake pumps, 32, two grades of water-ins, 42, two grades of triphase separators, 62, two grades of backflow systems 72 and secondary effluent system 82; Chemicals addition control pond 1 is provided with one-level pH on-line computing model 21; Chemicals addition control pond 1 water outlet is controlled to be connected with one-level water-in 41 by one-level intake pump 31; One-level EGSB reactor 51 inner wall lower is provided with two grades of pH on-line computing model 22; The feed-water end of intermediate pool 10 is connected with primary effluent system 81, and the water side of intermediate pool 10 is controlled to be connected with two grades of water-ins 42 by two grades of intake pumps 32; One-level backflow system 71 is arranged on top in one-level EGSB reactor 51 reaction zone, and one-level backflow system 71 controls backwater to one-level water-in 41 by the first magnetic valve 91. Two grades of backflow systems 72 are arranged on top in two grades of EGSB reactor 52 reaction zones, the backflow moisture two strands of two grades of backflow systems 72, one water is back to two grades of water-ins 42 by the 2nd magnetic valve 92 control, and another strand of water is back to one-level water-in 41 by the 3rd magnetic valve 93 control. One-level triphase separator 61 and two grades of triphase separators 62 are separately positioned on one-level EGSB reactor 51 and two grades of EGSB reactors 52 inside, and gas collector 11 is connected with one-level triphase separator 61 and two grades of triphase separator 62 outlet sides, for the gas collecting one-level triphase separator 61 and two grades of triphase separators 62 are separated. Electrical control system 12 is connected with chemicals addition control pond 1, one-level intake pump 31, one-level pH on-line computing model 21, two grades of pH on-line computing model 22, first magnetic valves 91, the 2nd magnetic valve 92, the 3rd magnetic valve 93 and two grades of intake pumps 32 respectively. Electrical control system 12 is micro-chip, programmable logic controller or industrial computer, its input terminus respectively with one-level pH on-line computing model 21, two grades of pH on-line computing model 22, its output terminal is connected with chemicals addition control pond 1, first magnetic valve 91, the 2nd magnetic valve 92, the 3rd magnetic valve 93 and two grades of intake pumps 32 respectively, and electrical control system or is closed in each device unlatching of output terminal according to the signal control linkage of the pH value of one-level pH on-line computing model 21 2 grades of pH on-line computing model 22.
Further, one-level EGSB reactor 51 is identical with two grades of EGSB reactor 52 volumes, one-level EGSB reactor 51 and two grades of EGSB reactors 52 are formed by reaction zone and settling region, and the volume ratio of reaction zone and settling region is 13:8, and the aspect ratio of reaction zone is 16.25. One-level EGSB reactor 51 and two grades of EGSB reactors 52 are anaeration in normal temperature reactor, and range of reaction temperature is 33~37 DEG C.
Inside, chemicals addition control pond 1 is provided with NaOH, NaHCO3、KH2PO4And NH4The dosing unit of Cl tetra-kinds of medicaments.Electrical control system 12 feeds back according to the data of one-level pH on-line computing model 21, regulates the NaOH chemical feeding quantity in chemicals addition control pond 1. Electrical control system 12 feeds back according to the data of two grades of pH on-line computing model 22, regulates the open and close of the first magnetic valve 91, the 2nd magnetic valve 92 and the 3rd magnetic valve 93, the flow of control two grades of intake pumps 32 and the NaHCO in control chemicals addition control pond 13Chemical feeding quantity. Concrete, one-level pH on-line computing model 21 controls the interpolation of NaOH, and control inlet flow-patterm, makes the pH value into water be 5.0~7.0. Two grades of pH on-line computing model control NaHCO3 add, by the pH value in the flow control one-level EGSB reactor 51 of the open and close and two grades of intake pumps 32 that control the first magnetic valve 91, the 2nd magnetic valve 92 and the 3rd magnetic valve 93. Under normal circumstances, the data that two grades of pH on-line computing model 22 record are 7.0~9.0, and now, the first magnetic valve 91 and the 2nd magnetic valve 92 are opened, the 3rd magnetic valve 93 cuts out. When pH≤6.5, the first magnetic valve 91 and the 2nd magnetic valve 92 are closed, the 3rd magnetic valve 93 is opened, and meanwhile, two grades of intake pump 32 flows increase. When pH continues (more than 2 hours) when 6.0~6.5 scope, add NaHCO3 amount for 2kg/m3, pH continues (more than 2h) when 5.5~6.0 scope, adds NaHCO3 amount for 3kg/m3, pH continues (more than 2h) when≤5.5, adds 4kg/m3
Present embodiment is the fast quick-recovery anaerobic reaction system of acidifying utilizing two-stage EGSB reactor for treatment height organic concentration coal liquifaction F-T synthesis waste water, comprise one-level EGSB reactor 51, two grades of EGSB reactors 52 and an intermediate pool 10, waste water processes through one-level EGSB reactor 51 after removing most COD, flow through intermediate pool and enter two grades of EGSB reactors, through two-stage reactor process, coal liquifaction F-T synthesis waste water COD concentration can be down to below 800mg/L from 40000mg/L. Under accidental conditions, two reactors independently arrange backflow, play dilution water inlet and improve upflow liquid velocity effect. During one-level EGSB reactor 51 acidifying, change reflux type, by the effluent recycling of two grades of EGSB reactors 52 in one-level EGSB reactor 51, the water outlet of one-level EGSB reactor 51 directly accesses two grades of EGSB reactors 52, waste water in two-stage EGSB reactor is fully mixed, alleviating acidification phenomenon, necessity is opened chemicals addition control pond 1 and is added NaHCO to water inlet3, increase influent alkalinity.
During use, regulating F-T synthesis wastewater pH to 5.0~6.0 by chemicals addition control pond 1, COD:N:P is after 100~500:5:1, enters one-level EGSB reactor 51 by one-level intake pump 31 and one-level water-in 41. Temperature of reactor is controlled to 33~37 DEG C, and waste water hydraulic detention time is 36~44h, regulates upflow liquid velocity to 2.0m/h by one-level backflow system 71. Producing biogas and enter gas collector 11 by one-level triphase separator 61, water outlet enters two grades of EGSB reactors 52 by primary effluent system 81, intermediate pool 10, two grades of intake pumps 32 and two grades of water-ins 42. Two grades of EGSB reactor 52 operating parameters (temperature of reaction hydraulic detention time, upflow liquid velocity) are identical with one-level EGSB reactor 51. Producing biogas and enter gas collector 11 by two grades of triphase separators 62, water outlet enters next stage treatment process by outlet system 82. When inlet COD concentration is uprushed, reactor volume load increases, it is easy to cause reactor acidifying. When two grades of pH on-line computing model 22 monitor in one-level EGSB reactor 51 pH when 5.5~6.5 scope, the opening and closing of the 3rd magnetic valve 93 is controlled by electrical control system 12, two grades of backflow systems 71 are made to be back to one-level EGSB reactor 51, in two EGSB reactors, waste water fully mixes, and wastewater pH and basicity in one-level EGSB reactor 51 are maintained in the reasonable scope.When pH is less than 5.5 in one-level EGSB reactor 51, while taking above-mentioned measure, add NaHCO to chemicals addition control pond 13And suitably reduce water inlet flow velocity, while increasing influent alkalinity, reduce the volumetric loading of reactor, urgent reply reactor acidifying problem.
In order to verify the validity of the present invention, utilize said apparatus system Inner Mongol coal liquifaction factory F-T synthesis waste water, inlet COD concentration is 37000~40780mg/L, inlet flow-patterm is 2.73~3.42, chemicals addition control pond 1 regulates inlet flow-patterm to 6.0, COD:N:P is after 200:5:1, enters two-stage EGSB reactor. Treated, in the water outlet flowed out by the secondary effluent system 82 of two grades of EGSB reactors 52, COD concentration is down to 600~800mg/L, and clearance is up to 98%~99%. When reactor moves to 167 days, there is acidification phenomenon in one-level EGSB reactor 51, and water outlet pH is down to 5.94, after adopting the reflux type that aforesaid method changes two-stage EGSB reactor, can recover normal in 24h. When reactor runs 249 days, there is severe acidification phenomenon in one-level EGSB reactor 51, and water outlet pH is down to 5.27, adopts aforesaid method to change the reflux type of two-stage EGSB reactor, and adds NaHCO3After regulating influent alkalinity, COD clearance returned to 98% from 95% in 3 days.
In sum, the fast quick-recovery anaerobic reaction system of acidifying provided by the invention, achieve the anaerobic biological treatment of high organic concentration coal liquifaction F-T synthesis waste water, solve the problem of the easy acidifying of high-load anaerobic reactor, simultaneously also for the similar waste water of process provides technical support.
The present invention utilizes two-stage EGSB reactor for treatment coal liquifaction F-T synthesis waste water, and in EGSB reactor settling region, waste water is back to water-in, can organic concentration in diluting reactor, it is to increase reactor for treatment ability, ensures effluent quality; All be provided with pH on-line monitoring system in chemicals addition control pond and one-level EGSB reactor, can Timeliness coverage reactor acidifying problem, and the control by electrical control system, makes corresponding in time, takes emergency measures; Two-stage EGSB reactor can successfully manage reactor acidifying problem. Adopt bigger volumetric loading, reduce reactor floor space, save construction cost; Two-stage EGSB reactor can produce a large amount of biogas, and biogas can be used for generating and produces economic benefit.
Last it is noted that above embodiment is only in order to illustrate the technical scheme of the present invention, it is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein part technology feature is carried out equivalent replacement; And these amendments or replacement, do not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.

Claims (7)

1. the fast quick-recovery anaerobic reaction system of acidifying, it is characterized in that: comprise chemicals addition control pond (1), one-level EGSB reactor (51), two grades of EGSB reactors (52), intermediate pool (10), gas collector (11), electrical control system (12), first magnetic valve (91), 2nd magnetic valve (92) and the 3rd magnetic valve (93), described one-level EGSB reactor (51) is provided with one-level intake pump (31), one-level water-in (41), one-level triphase separator (61), one-level backflow system (71) and primary effluent system (81), described two grades of EGSB reactors (52) are provided with two grades of intake pumps (32), two grades of water-ins (42), two grades of triphase separators (62), two grades of backflows system (72) and secondary effluent system (82),Described chemicals addition control pond (1) is provided with one-level pH on-line computing model (21); Described chemicals addition control pond (1) water outlet is connected with one-level water-in (41) by one-level intake pump (31) control; Described one-level EGSB reactor (51) inner wall lower is provided with two grades of pH on-line computing model (22); The feed-water end of described intermediate pool (10) is connected with primary effluent system (81), and its water side is connected with two grades of water-ins (42) by two grades of intake pump (32) controls; Described one-level backflow system (71) is arranged on top in one-level EGSB reactor (51) reaction zone, and described one-level refluxes system (71) by the first magnetic valve (91) backwater to one-level water-in (41); Described two grades of backflows system (72) are arranged on top in two grades of EGSB reactor (52) reaction zones, the backflow moisture two strands of described two grades of backflows system (72), one water is back to two grades of water-ins (42) by the 2nd magnetic valve (92) control, and another strand of water is back to one-level water-in (41) by the 3rd magnetic valve (93) control; Described one-level triphase separator (61) and two grades of triphase separators (62) are separately positioned on one-level EGSB reactor (51) and two grades of EGSB reactors (52) inside, and gas collector (11) is connected with one-level triphase separator (61) and two grades of triphase separator (62) outlet sides; Described electrical control system (12) is connected with chemicals addition control pond (1), one-level pH on-line computing model (21), two grades of pH on-line computing model (22), the first magnetic valve (91), the 2nd magnetic valve (92), the 3rd magnetic valve (93) and two grades of intake pumps (32) respectively.
2. the fast quick-recovery anaerobic reaction system of acidifying according to claim 1, it is characterised in that: described one-level EGSB reactor (51) is identical with the volume of two grades of EGSB reactors (52), forms by reaction zone and settling region.
3. the fast quick-recovery anaerobic reaction system of acidifying according to claim 2, it is characterised in that: the volume ratio of described reaction zone and settling region is 13:8, and described reaction zone aspect ratio is 16.25.
4. the fast quick-recovery anaerobic reaction system of acidifying according to claim 1, it is characterised in that: described one-level EGSB reactor (51) and two grades of EGSB reactors (52) are anaeration in normal temperature reactor, and temperature of reaction is 33~37 DEG C.
5. the fast quick-recovery anaerobic reaction system of acidifying according to claim 1, it is characterised in that: described chemicals addition control pond (1) is provided with NaOH, NaHCO3、KH2PO4And NH4The dosing unit of Cl tetra-kinds of medicaments.
6. the fast quick-recovery anaerobic reaction system of acidifying according to claim 1, it is characterized in that: described electrical control system (12) feeds back according to the data of one-level pH on-line computing model (21), regulate the NaOH chemical feeding quantity in chemicals addition control pond (1).
7. the fast quick-recovery anaerobic reaction system of acidifying according to claim 1, it is characterized in that: described electrical control system (12) feeds back according to the data of two grades of pH on-line computing model (22), regulate the open and close of the first magnetic valve (91), the 2nd magnetic valve (92) and the 3rd magnetic valve (93), control two grades of intake pump (32) flows and the NaHCO of control chemicals addition control pond (1)3Chemical feeding quantity.
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CN106946413A (en) * 2017-04-27 2017-07-14 哈尔滨工业大学 A kind of system and technique for handling high ammonia nitrogen antibiotic waste water
CN110357366A (en) * 2019-08-13 2019-10-22 南京工业大学 A kind of F- T synthesis biochemical procss for treating waste water

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WO2000039036A1 (en) * 1998-12-23 2000-07-06 Norsk Hydro Asa Method for treatment of organic material in a two-step anaerobic biochemical reactor
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CN106946413A (en) * 2017-04-27 2017-07-14 哈尔滨工业大学 A kind of system and technique for handling high ammonia nitrogen antibiotic waste water
CN110357366A (en) * 2019-08-13 2019-10-22 南京工业大学 A kind of F- T synthesis biochemical procss for treating waste water
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