CN117209003B - Polytetrahydrofuran production waste liquid treatment device and process - Google Patents
Polytetrahydrofuran production waste liquid treatment device and process Download PDFInfo
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- CN117209003B CN117209003B CN202311072287.4A CN202311072287A CN117209003B CN 117209003 B CN117209003 B CN 117209003B CN 202311072287 A CN202311072287 A CN 202311072287A CN 117209003 B CN117209003 B CN 117209003B
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- 239000007788 liquid Substances 0.000 title claims abstract description 161
- 239000002699 waste material Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 31
- 229920000909 polytetrahydrofuran Polymers 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 77
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000006260 foam Substances 0.000 claims abstract description 37
- 229910052742 iron Inorganic materials 0.000 claims abstract description 36
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 238000007599 discharging Methods 0.000 claims abstract description 14
- 239000002351 wastewater Substances 0.000 claims abstract description 8
- 238000005192 partition Methods 0.000 claims description 96
- 238000012856 packing Methods 0.000 claims description 25
- 238000004140 cleaning Methods 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 13
- 239000003921 oil Substances 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 9
- 230000003247 decreasing effect Effects 0.000 claims description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 6
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000000368 destabilizing effect Effects 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 238000000746 purification Methods 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 21
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 15
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 12
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000002344 surface layer Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- -1 heterocyclic organic compound Chemical class 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002334 Spandex Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 239000004759 spandex Substances 0.000 description 1
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Abstract
The invention discloses a polytetrahydrofuran production waste liquid treatment device and a polytetrahydrofuran production waste liquid treatment process, which belong to the technical field of waste water treatment and comprise a treatment tank, wherein two ends of the treatment tank are respectively communicated with a liquid inlet pipe and a liquid outlet pipe, the bottom of the treatment tank is provided with a foam discharging assembly, the inside of the treatment tank is provided with a sealing assembly, and one end of the sealing assembly is connected with a transfer assembly; according to the invention, the treated clear liquid, foam scum and iron mud can be mutually sealed and isolated for discharge through the sealing and isolating assembly, so that the content of the foam scum and the iron mud at the bottom of the treatment tank is greatly reduced when the clear liquid is discharged, the treatment effect of the subsequent treatment process is improved, and meanwhile, the size of bubbles is regulated through the sealing and isolating assembly, so that the reduction degree and the number of bubbles are regulated for wastewater with different concentrations, the ideal purification treatment effect is achieved, and the sealing and isolating assembly is driven by the regulating and moving assembly to synchronously isolate three layers formed after the purification treatment, and meanwhile, the number of bubbles and the reduction bubbles can be regulated more accurately.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a device and a process for treating waste liquid in polytetrahydrofuran production.
Background
Polytetrahydrofuran is a mixture of tetrahydrofuran, tetrahydrofuran is a heterocyclic organic compound, belongs to ethers, is a completely hydrogenated product of aromatic compound furan, high-purity tetrahydrofuran is usually prepared by a rectification process, and is subjected to air oxidation to form peroxide, so that the peroxide has explosion hazard, a rectification separation process generally adopts continuous rectification to reduce the contact with air, the rectification process is shown in figure 1, the polytetrahydrofuran prepared from tetrahydrofuran has excellent performance, is quite wide in application, is an important chemical raw material in the chemical industry field, can be used for preparing spandex in the chemical fiber field, can be used for preparing polyurethane rubber in the rubber field, and is prepared by using an acid catalyst to polymerize tetrahydrofuran to generate polytetramethylene diacetate or monoester, and then is subjected to alcoholysis reaction to generate polytetrahydrofuran which is a product, and the polytetrahydrofuran can generate waste liquid which contains various pollutants and is difficult to treat in the production process, wherein the waste liquid contains the pollutants such as alcohols, the finished products, the auxiliary materials and the like.
When the polytetrahydrofuran waste liquid is treated, firstly, the polytetrahydrofuran waste liquid is conveyed to a high-concentration organic waste water regulating tank by a pipeline, the waste liquid after water quantity regulation firstly enters an air floatation device, oil and suspended matters in the waste liquid are effectively removed through air floatation purification, foam scum is formed, the waste liquid after air floatation purification treatment is uniformly conveyed into a micro-electrolysis tank, iron carbon filler is filled in the micro-electrolysis tank, primary batteries are formed by utilizing iron filings and carbon particles, charged colloidal particles are destabilized and aggregated by the action of a micro-electric field to settle, iron mud is formed and settled at the bottom of the tank, thus the pretreatment of the waste liquid is completed, the clear liquid after pretreatment is formed, during the discharge of the clear liquid, part of foam scum and part of iron mud are easily rolled up by the clear liquid, the purity of the discharged clear liquid is not high enough, the purification treatment effect of the subsequent treatment process is affected, and simultaneously the air bubble size and quantity in the treatment tank are inconvenient to regulate correspondingly, the air source for different concentrations of the waste liquid is difficult to be subjected to corresponding regulation, and the purification treatment effect is easy to waste.
Therefore, there is a need to provide a polytetrahydrofuran production waste liquid treatment device and process which solve the above technical problems.
Disclosure of Invention
The invention aims to provide a device and a process for treating waste liquid in polytetrahydrofuran production, which are used for solving the problems that clear liquid is easy to take up part of foam scum and part of iron mud to be discharged to the next treatment process in the background technology, the purification treatment effect of the subsequent treatment process is affected, and bubbles in a treatment tank are difficult to correspondingly adjust aiming at waste liquid with different concentrations, so that the purification treatment effect is affected.
In order to achieve the above object, the present invention solves the above technical problems as follows: the polytetrahydrofuran production waste liquid treatment device comprises a treatment tank, wherein two ends of the treatment tank are respectively communicated with a liquid inlet pipe and a discharge pipe, a bubble outlet component for uniformly filling bubbles into the waste liquid is arranged at the bottom of the treatment tank, and a packing component for adjusting the size of bubbles output by the bubble outlet component and enabling the treated liquid at the middle part of the treatment tank to be separated.
As a further scheme of the invention, the packing assembly comprises a second built-in baffle plate fixed on the inner side wall of the top end of the treatment tank, a plurality of third flow holes are formed in the side face of the second built-in baffle plate, an upper packing baffle plate is arranged on the top face of the third flow holes in a fitting mode, and a plurality of first flow holes corresponding to the third flow holes are formed in the side face of the upper packing baffle plate.
As a further scheme of the invention, a first built-in partition plate positioned above the bubble outlet assembly is fixed on the inner side wall of the bottom end of the treatment tank, a plurality of fourth flow holes are formed in the side face of the first built-in partition plate, a lower sealing partition plate which is synchronously moved and adjusted with the upper sealing partition plate is attached to the top face of the first built-in partition plate, and a plurality of second flow holes corresponding to the fourth flow holes are formed in the side face of the lower sealing partition plate.
As a further scheme of the invention, thin rubber layers are arranged between the upper sealing partition plate and the second built-in partition plate and between the lower sealing partition plate and the first built-in partition plate, and the first flow hole, the second flow hole, the third flow hole and the fourth flow hole are arranged in an oval shape.
As a further aspect of the present invention, the first through hole, the second through hole, the third through hole, and the fourth through hole are rectangular.
As a further scheme of the invention, the upper sealing partition plate and the second built-in partition plate are obliquely arranged relative to the horizontal plane, a first cleaning opening positioned at the lower end of the upper sealing partition plate is formed in the top end of the treatment tank, and a first cover plate is hinged in the first cleaning opening.
As a further scheme of the invention, one end of the packing assembly is connected with a transfer assembly which is gradually increased and decreased by a small amount to adjust the position of the packing assembly, the transfer assembly comprises two connecting rods which are fixed at the same side ends of the upper packing plate and the lower packing plate, the two connecting rods penetrate through the side wall of the treatment tank in a sliding manner and are jointly fixed with a connecting plate, the center of the connecting plate is fixedly provided with a nut sleeve, the internal thread of the nut sleeve is connected with a threaded rod, one end of the threaded rod is rotationally connected with the side wall of the treatment tank, and the other end of the threaded rod is fixedly provided with a transfer hand wheel.
As a further scheme of the invention, the bubble outlet assembly comprises a coiled pipe arranged at the bottom of the treatment tank, the coiled pipe is communicated with an air inlet pipe, a plurality of arc-shaped air outlet pipes communicated with the inside of the coiled pipe are fixed on the surface of the coiled pipe, and the arc-shaped air outlet pipes are distributed at equal intervals along the bending curve of the coiled pipe.
As a further scheme of the invention, the output port of the arc-shaped air outlet pipe is arranged downwards, a gap is arranged between the output port of the arc-shaped air outlet pipe and the bottom of the treatment tank, an inclined surface is arranged at the bottom of the treatment tank, a second cleaning port positioned at the lower end of the inclined surface is arranged on the side wall of the treatment tank, and a second cover plate is hinged in the second cleaning port.
A process for treating waste liquid generated in polytetrahydrofuran production comprises the following steps:
S1, conveying waste liquid from polytetrahydrofuran production into a treatment tank through a liquid inlet pipe, immersing a first flow hole on the liquid level of the waste liquid, externally connecting an air source with an air inlet pipe, discharging the waste liquid through a plurality of arc-shaped air outlet pipes to generate a large number of bubbles at the bottom of the waste liquid, and enabling the generated bubbles to flow upwards through a second flow hole, a fourth flow hole, a third flow hole and the first flow hole in sequence, so that substances with lighter specific gravity of oils and suspended matters in the waste liquid are attached to the bubbles and rise to the liquid level of the waste liquid along with the bubbles to form foam scum on the liquid level of the waste liquid;
s2, regulating the PH value of the waste liquid to be acidic, filling micro-electrolysis iron-carbon filler at the bottom of the treatment tank, destabilizing and gathering charged colloidal particles under the action of a micro-electric field to settle to the bottom of the treatment tank, adding a certain amount of PAM, forming iron mud at the bottom of the treatment tank after static settlement for a period of time, and respectively placing foam scum, treated clear liquid and iron mud at the top, the middle and the bottom of the treatment tank after separation reaction for a certain time to form three layers;
S3, turning a hand wheel to enable the connecting plate to drive the two connecting rods to drive the upper sealing partition plate and the lower sealing partition plate to move at the same time, so that a plurality of first flow holes on the upper sealing partition plate and a plurality of third flow holes on the second built-in partition plate are completely misplaced, a plurality of second flow holes on the sealing partition plate and a plurality of fourth flow holes on the first built-in partition plate are completely misplaced, and the treated clear liquid, foam scum and iron mud are mutually sealed and isolated;
s4, adjusting the flow caliber of the allowed bubbles by adjusting the mutual dislocation degree of the second flow holes and the fourth flow holes, so as to adjust the quantity and the size of the bubbles, effectively crushing the bubbles, and correspondingly adjusting the crushing degree and the quantity of the bubbles aiming at wastewater with different concentrations;
S5, opening a valve on the discharge pipe, so that the treated clear liquid can be discharged through the discharge pipe in a separated mode, and discharged to the next treatment procedure for treatment, foam scum is flushed and discharged or scraped through the first cleaning port, and iron mud at the bottom of the treatment tank is cleaned through the second cleaning port.
Compared with the prior art, the invention has the beneficial effects that:
1. The three layers formed by the purification treatment are mutually sealed and isolated through the sealing and isolating component, namely, the treated clear liquid, foam scum and iron mud are mutually sealed and isolated to be discharged, so that the content of the foam scum and the iron mud at the bottom of the treatment tank is greatly reduced due to the flowing action of the liquid when the clear liquid is discharged, the relative purity of the discharged clear liquid is effectively improved, the purification treatment effect of the subsequent treatment procedures is improved, and the efficiency and the quality of the whole purification treatment are further improved;
2. the size of bubbles discharged by the bubble discharging assembly is regulated through the packing assembly, and the bubbles can be further crushed through the packing assembly, so that the crushing degree and the number of the bubbles can be regulated according to wastewater with different concentrations, the bubbles can be correspondingly regulated, the ideal purifying treatment effect is achieved, the consumption of gas input source energy is reduced, and the cost is saved;
3. The seal assembly is driven by the transfer assembly to synchronously separate three layers formed after purification treatment, the adjustment operation is convenient, and meanwhile, the position of the seal assembly is adjusted accurately by gradually increasing and decreasing the transfer assembly by a small amount, so that the precision of the seal assembly for adjusting the number of bubbles and reducing the bubbles is improved, the treatment effect on waste liquid is further improved, the adjustment structure is simple, and the practicability is strong;
4. The bubble outlet assembly is integrally arranged at the bottom of the treatment tank in an S shape, so that the uniformity of the distribution of bubbles in the treatment tank is effectively improved, the bubbles are uniformly dispersed and lifted on the cross section of the inside of the treatment tank, the possibility of contact between the bubbles and oil and suspended matters particles with lighter specific gravity in waste liquid is effectively improved, and the air floatation purification and separation treatment effect is improved.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a diagram of a tetrahydrofuran rectification process;
FIG. 2 is a perspective view of the whole structure of the present invention;
FIG. 3 is a perspective view of the whole structure of the present invention;
FIG. 4 is a schematic diagram of the internal structure of a treatment tank according to the present invention;
FIG. 5 is a schematic diagram of the internal structure of the treatment tank according to the present invention;
FIG. 6 is a schematic diagram of the internal structure of a treatment tank according to the present invention;
FIG. 7 is an enlarged view of the structure of FIG. 6 at A;
FIG. 8 is a schematic view of a part of the structure of the adjusting assembly according to the present invention;
FIG. 9 is a schematic view of a partial structure of an upper and lower baffle plate of the present invention;
FIG. 10 is a schematic view of a partial structure of a first and a second internal partition according to the present invention;
fig. 11 is a schematic structural view of a foaming assembly according to the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. A packing assembly; 101. an upper sealing partition plate; 102. a first flow hole; 103. a lower sealing partition plate; 104. a second flow hole; 105. a first built-in partition; 106. a second built-in partition; 107. a third flow hole; 108. a fourth flow hole; 2. an adjustment assembly; 201. a connecting rod; 202. a connecting plate; 203. a nut sleeve; 204. a threaded rod; 205. a hand wheel is mobilized; 206. sealing the rubber sleeve; 207. a socket; 3. a bubble discharging assembly; 301. a serpentine tube; 302. an air inlet pipe; 303. an arc-shaped air outlet pipe; 4. a treatment pool; 5. a liquid inlet pipe; 6. a discharge pipe; 7. a first cover plate; 8. a first cleaning port; 9. a second cleaning port; 10. a second cover plate; 11. and (5) an inclined plane.
Detailed Description
The invention is further described below with reference to examples.
Referring to fig. 2-11, the invention provides a polytetrahydrofuran production waste liquid treatment device, which comprises a treatment tank 4, wherein two ends of the treatment tank 4 are respectively communicated with a liquid inlet pipe 5 and a discharge pipe 6, a valve is arranged on the discharge pipe 6, the bottom of the treatment tank 4 is provided with a bubble outlet assembly 3, bubbles are uniformly filled into waste liquid through the bubble outlet assembly 3, a sealing assembly 1 is arranged in the treatment tank 4, the size of bubbles output by the bubble outlet assembly 3 is regulated through the sealing assembly 1, the treated liquid in the middle of the treatment tank 4 is discharged in a separated mode, one end of the sealing assembly 1 is connected with a transfer assembly 2, and the position of the sealing assembly 1 is regulated accurately by gradually increasing and decreasing the transfer assembly 2 by a small amount; the polytetrahydrofuran production waste liquid is conveyed into the treatment tank 4 through the liquid inlet pipe 5, the bubble outlet component 3 is externally connected with an air source, a large number of bubbles are generated at the bottom of the waste liquid through the bubble outlet component 3, so that substances with lighter specific gravity of oils and suspended matters in the waste liquid are attached to the bubbles and rise to the liquid surface of the waste liquid along with the bubbles, part of suspended particles in the waste liquid are separated, foam scum is formed on the liquid surface of the waste liquid, the whole bubble outlet component 3 is arranged at the bottom of the treatment tank 4 in an S shape, thereby effectively improving the uniformity of the distribution of the bubbles in the treatment tank 4, leading the bubbles to uniformly spread and rise on the inner cross section of the treatment tank 4, effectively improving the possibility of contact between the bubbles and the substances with lighter specific gravity of the oils and suspended matters in the waste liquid, improving the air floatation purification separation treatment effect, meanwhile, the bottom of the treatment tank 4 is filled with micro-electrolysis iron-carbon filler, acid liquor is added into the waste liquid to adjust the overall pH value of the waste liquid to be acidic, scrap iron and carbon particles are utilized to form a primary cell, charged colloidal particles are destabilized and aggregated by the action of a micro-electric field to be settled to the bottom of the treatment tank 4, a certain amount of PAM is added, after static settlement for a period of time, iron mud is formed at the bottom of the treatment tank 4, so that the B/C value in the polytetrahydrofuran waste liquid is improved, the biodegradability of the polytetrahydrofuran waste liquid is improved, after a certain time of separation reaction, foam scum, the treated clear liquid and the iron mud are respectively placed at the top, the middle and the bottom of the treatment tank 4, thus three layers are formed, the pretreatment of the waste liquid is completed, the air floatation purification and micro-electrolysis purification of the waste liquid are integrally combined, and the overall purification treatment efficiency is effectively improved;
The three layers formed by the purification treatment are mutually sealed and isolated through the sealing assembly 1, namely, the treated clear liquid, foam scum and iron mud are mutually sealed and isolated for discharging, so that the content of the foam scum and iron mud at the bottom of the treatment tank 4 is greatly reduced, the relative purity of the discharged clear liquid is effectively improved, the purification treatment effect of the subsequent treatment procedures is improved, the efficiency and the quality of the whole purification treatment are further improved, a valve on the discharge pipe 6 is opened, so that the treated clear liquid can be discharged through the discharge pipe 6 in a separated mode and discharged to the next treatment procedure for treatment, and meanwhile, the size of bubbles discharged by the bubble discharging assembly 3 can be regulated through the sealing assembly 1, and the bubbles can be further crushed through the sealing assembly 1, so that the crushing degree and the bubble quantity of the bubbles can be regulated for wastewater with different concentrations, the ideal purification treatment effect is achieved, the consumption of gas input sources is reduced, and the cost is saved; the three layers formed after the purification treatment are synchronously separated by the packing assembly 1 driven by the transferring assembly 2, the regulation operation is convenient, and meanwhile, the position of the packing assembly 1 is accurately regulated by gradually increasing and decreasing the transferring assembly 2 by a small amount, so that the precision of the quantity of bubbles regulated by the packing assembly 1 and the precision of crushed bubbles are improved, the treatment effect on waste liquid is further improved, the regulation structure is simple, and the practicability is strong.
As further shown in fig. 3,5, 8 and 10, it should be noted that, the packing assembly 1 includes a second built-in partition 106 fixed on the inner sidewall of the treatment tank 4, the second built-in partition 106 is located at the top end of the treatment tank 4, a third through-hole 107 is formed on a side surface of the second built-in partition 106, a plurality of third through-holes 107 are distributed at equal intervals, an upper packing plate 101 is attached and slid on a top end side surface of the third through-hole 107, a first through-hole 102 is formed on a side surface of the upper packing plate 101, and a plurality of first through-holes 102 are formed corresponding to the plurality of third through-holes 107; when the waste liquid is purified, the liquid level of the waste liquid submerges the first flow hole 102, the first flow hole 102 and the third flow hole 107, the second flow hole 104 and the fourth flow hole 108 are respectively overlapped, so that the whole inside of the treatment tank 4 is in an open state, bubbles generated by the bubble discharging assembly 3 sequentially pass through the second flow hole 104, the fourth flow hole 108, the third flow hole 107 and the first flow hole 102 to rise and flow to the liquid level, so that the bubbles can absorb and carry oil and substance particles with lighter specific gravity of suspended substances to rise to the liquid level to form foam scum, and when clear liquid is required to be discharged, the upper sealing partition plate 101 is moved, so that the first flow holes 102 on the upper sealing partition plate 101 and the third flow holes 107 on the second built-in partition plate 106 are completely misplaced, and the foam scum on the surface layer of the liquid level and the treated clear liquid are mutually sealed and isolated, so that the content of the foam scum on the surface layer is greatly reduced, and the relative purity of the clear liquid without foam scum is effectively improved when the clear liquid is discharged.
As further shown in fig. 5, 8, 9 and 10, it is worth specifically explaining that a first built-in partition 105 is fixed on the inner side wall of the treatment tank 4, the first built-in partition 105 is located at the bottom end of the treatment tank 4, a fourth flow hole 108 is formed on the side surface of the first built-in partition 105, a plurality of fourth flow holes 108 are distributed at equal intervals, a lower sealing partition 103 is attached and slides on the top side surface of the first built-in partition 105, the lower sealing partition 103 and the upper sealing partition 101 move synchronously and adjust, a second flow hole 104 is formed on the side surface of the lower sealing partition 103, a plurality of second flow holes 104 are formed on the side surface of the second sealing partition 104 and correspond to the fourth flow holes 108, a discharge pipe 6 is located at the bottom end of a space formed by the first built-in partition 105, the second built-in partition 106 and the side wall of the treatment tank 4, and the liquid inlet pipe 5 is located at the top end of the space formed by the first built-in partition 105, the second built-in partition 106 and the side wall 4; the charged colloidal particles are destabilized and aggregated in the treatment tank 4 through the action of a micro electric field and are settled to the bottom of the treatment tank 4, iron mud is formed at the bottom of the treatment tank 4, when clear liquid is required to be discharged, the lower sealing partition plate 103 is moved, so that a plurality of second flow holes 104 on the lower sealing partition plate 103 and a plurality of fourth flow holes 108 on the first built-in partition plate 105 are completely misplaced, the iron mud deposited at the bottom of the treatment tank 4 and the treated clear liquid are mutually sealed and isolated through the first built-in partition plate 105 and the lower sealing partition plate 103, the content of the coiled iron mud is greatly reduced when the clear liquid is discharged, and the relative purity of the discharged clear liquid without the iron mud is effectively improved.
As further shown in fig. 5 and 6, it is worth specifically explaining that the side surface of the upper sealing partition plate 101 close to the second built-in partition plate 106 and the side surface of the lower sealing partition plate 103 close to the first built-in partition plate 105 are respectively and fixedly attached with a thin rubber layer, and the first flow hole 102, the second flow hole 104, the third flow hole 107 and the fourth flow hole 108 are in oval arrangement; in specific work, the sealing performance of the upper sealing partition plate 101, the second built-in partition plate 106 and the lower sealing partition plate 103, which are close to the first built-in partition plate 105, is effectively improved through the arranged thin rubber layers, so that circulation permeation of different layers is avoided.
As further shown in fig. 2, fig. 6 and fig. 8, it is worth specifically explaining that the transfer assembly 2 includes two connecting rods 201 that slide through the side wall of the treatment tank 4, the two connecting rods 201 are arranged on the same side, one ends of the two connecting rods 201 located inside the treatment tank 4 are respectively fixed with the lower sealing partition plate 103 and the first built-in partition plate 105, one ends of the two connecting rods 201 located outside the treatment tank 4 are jointly fixed with a connecting plate 202, a nut sleeve 203 is fixed at the center position of the connecting plate 202, a threaded rod 204 is connected with the nut sleeve 203 in a threaded manner, one end of the threaded rod 204, which is close to the treatment tank 4, is rotatably connected with the side wall of the treatment tank 4 through a bearing, one end of the threaded rod 204, which is far away from the treatment tank 4, is fixed with a transfer hand wheel 205, and a rubber sleeve is sleeved on the surface of the transfer hand wheel 205; during specific work, the hand wheel 205 is turned and moved, the hand wheel 205 drives the threaded rod 204 to rotate in the nut sleeve 203, thereby the connecting plate 202 is driven to move through the cooperation of the threaded rod 204 and the nut sleeve 203, the connecting plate 202 simultaneously drives the two connecting rods 201 to push the upper sealing partition plate 101 and the lower sealing partition plate 103 to move relative to the second built-in partition plate 106 and the first built-in partition plate 105 respectively, thereby the first flow hole 102, the third flow hole 107, the second flow hole 104 and the fourth flow hole 108 are controlled to be mutually overlapped and opened and staggered to be closed, three layers formed after purification treatment are synchronously separated, the adjustment operation is convenient, the mutual staggered degree of the second flow hole 104 and the fourth flow hole 108 can be adjusted, the bubble circulation caliber is allowed to be adjusted, the size of bubbles can be adjusted, the bubbles can be effectively crushed, meanwhile, the positions of the upper sealing partition plate 101 and the lower sealing partition plate 103 can be gradually increased and decreased by small amounts, the precision of the bubbles can be adjusted, the waste liquid treatment effect is further improved, the adjustment structure is simple, and practicability is high.
As further shown in fig. 4, 5, 6 and 11, it should be noted that the bubble discharging assembly 3 includes a coiled pipe 301 fixed to the inner side wall of the treatment tank 4 and located below the first built-in partition 105, an air inlet pipe 302 communicating with the inside of the coiled pipe 301 is fixed to the surface of the coiled pipe 301, an arc-shaped air outlet pipe 303 communicating with the inside of the coiled pipe 301 is fixed to the outer surface of the coiled pipe 301, and a plurality of arc-shaped air outlet pipes 303 are arranged and distributed equidistantly along the bending curve of the coiled pipe 301; during specific work, the air inlet pipe 302 is externally connected with an air source, air is conveyed into the serpentine pipe 301 through the air inlet pipe 302 and is discharged through the arc-shaped air outlet pipes 303 so as to generate a large number of bubbles at the bottom of the waste liquid, the whole arc-shaped air outlet pipes 303 are arranged at the bottom of the treatment tank 4 in an S shape, so that the uniformity of the distribution of the bubbles in the treatment tank 4 is effectively improved, the bubbles are uniformly dispersed and lifted on the inner cross section of the treatment tank 4, the possibility of contact of the bubbles with oil and substance particles with lighter specific gravity of suspended matters in the waste liquid is effectively improved, and the air floatation purification separation treatment effect is improved.
The scheme comprises the following working processes: the waste liquid in polytetrahydrofuran production is conveyed into the treatment tank 4 through the liquid inlet pipe 5, the liquid level of the waste liquid submerges the first flow hole 102, the air inlet pipe 302 is externally connected with an air source, the air is conveyed into the serpentine 301 through the air inlet pipe 302 and is discharged through a plurality of arc-shaped air outlet pipes 303 to generate a large number of bubbles at the bottom of the waste liquid, the first flow hole 102, the third flow hole 107, the second flow hole 104 and the fourth flow hole 108 are respectively overlapped, so that the whole inside of the treatment tank 4 is in an open state, the generated bubbles sequentially pass through the second flow hole 104, the fourth flow hole 108, the third flow hole 107 and the first flow hole 102 to be lifted and circulated, the substances with lighter specific gravity of the oil and suspended substances in the waste liquid are adhered to the bubbles and are lifted to the liquid level of the waste liquid along with the bubbles, foam scum is formed on the liquid level of the waste liquid, and the bottom of the treatment tank 4 is filled with micro-electrolytic iron-carbon filler, the charged colloidal particles are destabilized and aggregated through the action of a micro electric field and are deposited to the bottom of the treatment tank 4, iron mud is formed at the bottom of the treatment tank 4, after a certain time of separation reaction, foam scum, treated clear liquid and iron mud are respectively arranged at the top, the middle and the bottom of the treatment tank 4 to form three layers, when clear liquid needs to be discharged, a hand wheel 205 is turned and adjusted, the hand wheel 205 drives a threaded rod 204 to rotate in a nut sleeve 203, so that a connecting plate 202 is driven to move through the cooperation of the threaded rod 204 and the nut sleeve 203, the connecting plate 202 drives an upper sealing baffle plate 101 and a lower sealing baffle plate 103 to move relative to a second built-in baffle plate 106 and a first built-in baffle plate 105 respectively through two connecting rods 201, a plurality of first flow holes 102 on the upper sealing baffle plate 101 and a plurality of third flow holes 107 on the second built-in baffle plate 106 are completely misplaced, the foam scum on the surface layer of the liquid level and the treated clear liquid are mutually sealed and isolated through the upper sealing baffle plate 101 and the second built-in baffle plate 106, meanwhile, the plurality of second flow holes 104 on the lower sealing baffle plate 103 and the plurality of fourth flow holes 108 on the first built-in baffle plate 105 are completely misplaced, so that the iron mud deposited at the bottom of the treatment tank 4 and the treated clear liquid are mutually sealed and isolated through the first built-in baffle plate 105 and the lower sealing baffle plate 103, namely, the treated clear liquid, the foam scum and the iron mud are mutually sealed and isolated for discharging, thereby greatly reducing the content of the foam scum of the clear liquid when discharging, and a valve on the discharge pipe 6 is opened, so that the treated clear liquid can be separately discharged through the discharge pipe 6 and discharged to the next treatment procedure for further treatment; the degree of mutual dislocation of the second flow holes 104 and the fourth flow holes 108 is adjusted to adjust the flow caliber of the allowed bubbles, so that the size and the number of the bubbles are adjusted, the bubbles are effectively crushed, and the crushing degree and the number of the bubbles of the wastewater with different concentrations can be adjusted.
As further shown in fig. 4, it is worth specifically describing that the first through-hole 102, the second through-hole 104, the third through-hole 107 and the fourth through-hole 108 are rectangular in shape; in a specific operation, through the first flow hole 102, the second flow hole 104, the third flow hole 107 and the fourth flow hole 108 which are arranged in a long rectangular shape, the relative dislocation adjusting space of the first flow hole 102, the third flow hole 107, the second flow hole 104 and the fourth flow hole 108 can be improved, and the air bubble reducing adjusting effect is improved.
As further shown in fig. 4,5 and 10, it should be specifically explained that a first cleaning opening 8 is formed in the top end of the treatment tank 4, the upper sealing partition plate 101 and the second built-in partition plate 106 are obliquely arranged relative to the horizontal plane, the first cleaning opening 8 is located at the lower end of the upper sealing partition plate 101, the bottom end of the first cleaning opening 8 is aligned with the edge on the lower end of the upper sealing partition plate 101, a first cover plate 7 is hinged in the first cleaning opening 8, and a handle is fixed on the outer surface of the first cover plate 7; when the first flow holes 102 and the third flow holes 107 are completely dislocated and closed, the foam dross stays on the top end side of the upper sealing partition plate 101, and the first cover plate 7 is opened, so that the foam dross can be conveniently flushed out or scraped off through the first cleaning opening 8.
As further shown in fig. 4 and 11, it is worth specifically explaining that the output ports of the plurality of arc-shaped air outlet pipes 303 are all arranged downward, the output port of the arc-shaped air outlet pipe 303 is positioned below the first built-in partition 105, and a gap is arranged between the output port of the arc-shaped air outlet pipe 303 and the bottom of the treatment tank 4; during specific work, the output port of the arc-shaped air outlet pipe 303 is arranged downwards, so that impurities are prevented from entering the inside of the coiled pipe 301 through the output port of the arc-shaped air outlet pipe 303, and the problem of blockage is avoided.
As further shown in fig. 4 and 5, it is worth specifically explaining that the inner side wall of the bottom end of the treatment tank 4 is provided with an inclined plane 11, the side wall of the treatment tank 4 is provided with a second cleaning opening 9 aligned with the lower end of the inclined plane 11, a second cover plate 10 is hinged in the second cleaning opening 9, and a handle is fixed on the outer surface of the second cover plate 10; during specific work, the second cover plate 10 is opened, so that iron mud at the bottom of the treatment tank 4 is conveniently cleared out through the second cleaning port 9 and the inclined plane 11 under the condition that the bottom of the treatment tank 4 is completely sealed by the second flow hole 104 and the fourth flow hole 108 in a dislocation mode.
Further, as shown in fig. 7, it is worth specifically explaining that a socket 207 is formed on the side wall of the treatment tank 4, the connecting rod 201 penetrates through the socket 207, and a sealing rubber sleeve 206 is fixed in the socket 207; the gap between the connecting rod 201 and the side wall of the treatment tank 4 is plugged through the sealing rubber sleeve 206, so that the problem of liquid leakage inside the treatment tank 4 is avoided.
A process for treating waste liquid generated in polytetrahydrofuran production comprises the following steps:
S1, conveying polytetrahydrofuran production waste liquid into the treatment tank 4 through a liquid inlet pipe 5, immersing a first flow hole 102 by the liquid level of the waste liquid, externally connecting an air source with an air inlet pipe 302, discharging the waste liquid through a plurality of arc-shaped air outlet pipes 303 to generate a large number of bubbles at the bottom of the waste liquid, and enabling the generated bubbles to sequentially pass through a second flow hole 104, a fourth flow hole 108, a third flow hole 107 and the first flow hole 102 for ascending and circulating, so that substances with lighter specific gravity of oils and suspended matters in the waste liquid are attached to the bubbles and rise to the liquid level of the waste liquid along with the bubbles to form foam scum on the liquid level of the waste liquid;
S2, regulating the PH value of the waste liquid to be acidic, filling micro-electrolysis iron-carbon filler at the bottom of the treatment tank 4, destabilizing and gathering charged colloidal particles under the action of a micro-electric field to settle to the bottom of the treatment tank 4, adding a certain amount of PAM, forming iron mud at the bottom of the treatment tank 4 after a period of static settlement, and respectively placing foam scum, treated clear liquid and iron mud at the top, the middle and the bottom of the treatment tank 4 after a certain period of separation reaction so as to form three layers;
S3, turning and adjusting a hand wheel 205, so that the connecting plate 202 drives the two connecting rods 201 to drive the upper sealing partition plate 101 and the lower sealing partition plate 103 to move, a plurality of first flow holes 102 on the upper sealing partition plate 101 and a plurality of third flow holes 107 on the second built-in partition plate 106 are completely misplaced, a plurality of second flow holes 104 on the lower sealing partition plate 103 and a plurality of fourth flow holes 108 on the first built-in partition plate 105 are completely misplaced, and the processed clear liquid, foam scum and iron mud are mutually sealed and isolated;
s4, adjusting the flow caliber of the allowed bubbles by adjusting the mutual dislocation degree of the second flow holes 104 and the fourth flow holes 108, so as to adjust the quantity and the size of the bubbles, effectively crushing the bubbles, and correspondingly adjusting the crushing degree and the quantity of the bubbles aiming at the wastewater with different concentrations;
S5, opening a valve on the discharge pipe 6, so that the treated clear liquid can be discharged through the discharge pipe 6 in a separated mode, and discharged to the next treatment procedure for treatment, foam scum is flushed and discharged or scraped through the first cleaning port 8, and iron mud at the bottom of the treatment tank 4 is cleaned through the second cleaning port 9.
To sum up: three layers formed by the purification treatment are mutually sealed and isolated through the sealing and isolating component 1, namely, the treated clear liquid, foam scum and iron mud are mutually sealed and isolated to be discharged, so that the content of the foam scum and iron mud at the bottom of the treatment tank 4 is greatly reduced due to the flowing action of the liquid when the clear liquid is discharged, the relative purity of the discharged clear liquid is effectively improved, the purification treatment effect of the subsequent treatment procedure is improved, and the efficiency and the quality of the whole purification treatment are further improved; the size of bubbles discharged by the bubble discharging assembly 3 is regulated through the packing assembly 1, and the bubbles can be further crushed through the packing assembly 1, so that the crushing degree and the bubble number of the bubbles can be regulated according to wastewater with different concentrations, the bubbles can be correspondingly regulated, the ideal purifying treatment effect is achieved, the consumption of gas input sources is reduced, and the cost is saved; the seal assembly 1 is driven by the transfer assembly 2 to synchronously separate three layers formed after purification treatment, the adjustment operation is convenient, and meanwhile, the position of the seal assembly 1 is adjusted accurately by gradually increasing and decreasing the transfer assembly 2 by a small amount, so that the accuracy of adjusting the number of bubbles and crushing the bubbles of the seal assembly 1 is improved, the treatment effect on waste liquid is further improved, the adjustment structure is simple, and the practicability is strong; the bubble outlet assembly 3 is integrally arranged at the bottom of the treatment tank 4 in an S shape, so that the uniformity of the distribution of bubbles in the treatment tank 4 is effectively improved, the bubbles are uniformly dispersed and lifted on the inner cross section of the treatment tank 4, the possibility of contact between the bubbles and oil in waste liquid and substance particles with lighter specific gravity of suspended matters is effectively improved, and the air floatation purification separation treatment effect is improved.
Claims (5)
1. A process for treating waste liquid generated in polytetrahydrofuran production is characterized in that,
The waste liquid treatment device for polytetrahydrofuran production adopted by the process comprises a treatment tank, wherein two ends of the treatment tank are respectively communicated with a liquid inlet pipe and a discharge pipe, a bubble outlet assembly for uniformly filling bubbles into waste liquid is arranged at the bottom of the treatment tank, a packing assembly for adjusting the size of bubbles output by the bubble outlet assembly and enabling the treated liquid in the middle of the treatment tank to be discharged in a separated mode is arranged in the treatment tank, the packing assembly comprises a second built-in baffle plate fixed on the inner side wall of the top end of the treatment tank, a plurality of third flow holes are formed in the side face of the second built-in baffle plate, an upper sealing baffle plate is attached to the top face of the third flow holes, and a plurality of first flow holes corresponding to the third flow holes are formed in the side face of the upper sealing baffle plate;
A first built-in partition plate positioned above the bubble discharging assembly is fixed on the inner side wall of the bottom end of the treatment tank, a plurality of fourth flow holes are formed in the side face of the first built-in partition plate, a lower sealing partition plate which is synchronously moved and adjusted with the upper sealing partition plate is attached to the top face of the first built-in partition plate, a plurality of second flow holes corresponding to the fourth flow holes are formed in the side face of the lower sealing partition plate, and the first flow holes, the second flow holes, the third flow holes and the fourth flow holes are rectangular;
one end of the packing assembly is connected with a transfer assembly which is gradually increased and decreased by a small amount to adjust the position of the packing assembly, the transfer assembly comprises two connecting rods which are fixed at the same side ends of the upper packing baffle and the lower packing baffle, the two connecting rods penetrate through the side wall of the treatment pool in a sliding manner and are fixedly connected with a connecting plate together, the center of the connecting plate is fixedly provided with a nut sleeve, the nut sleeve is internally connected with a threaded rod in a threaded manner, one end of the threaded rod is rotationally connected with the side wall of the treatment pool, and the other end of the threaded rod is fixedly provided with a transfer hand wheel;
The process comprises the following steps:
S1, conveying waste liquid from polytetrahydrofuran production into a treatment tank through a liquid inlet pipe, immersing a first flow hole on the liquid level of the waste liquid, externally connecting an air source with an air inlet pipe, discharging the waste liquid through a plurality of arc-shaped air outlet pipes to generate a large number of bubbles at the bottom of the waste liquid, and enabling the generated bubbles to pass through a second flow hole, a fourth flow hole, a third flow hole and the first flow hole in sequence for ascending and circulating, so that substances with lighter specific gravity of oils and suspended matters in the waste liquid are attached to the bubbles and rise to the liquid level of the waste liquid along with the bubbles to form foam scum on the liquid level of the waste liquid;
The mutual dislocation degree of the second flow holes and the fourth flow holes is regulated so as to regulate the flow caliber of the allowed bubbles, thereby regulating the quantity and the size of the bubbles, effectively crushing the bubbles, and correspondingly regulating the crushing degree and the quantity of the bubbles aiming at wastewater with different concentrations;
S2, regulating the pH value of the waste liquid to be acidic, filling micro-electrolysis iron-carbon filler at the bottom of the treatment tank, destabilizing and gathering charged colloidal particles under the action of a micro-electric field to settle to the bottom of the treatment tank, adding a certain amount of PAM, forming iron mud at the bottom of the treatment tank after static settlement for a period of time, and respectively placing foam scum, treated clear liquid and iron mud at the top, the middle and the bottom of the treatment tank after separation reaction for a certain time to form three layers;
S3, turning a hand wheel to enable the connecting plate to drive the two connecting rods to drive the upper sealing partition plate and the lower sealing partition plate to move at the same time, so that a plurality of first flow holes on the upper sealing partition plate and a plurality of third flow holes on the second built-in partition plate are completely misplaced, a plurality of second flow holes on the lower sealing partition plate and a plurality of fourth flow holes on the first built-in partition plate are completely misplaced, and the treated clear liquid, foam scum and iron mud are mutually sealed and isolated;
S4, opening a valve on the discharge pipe, so that the treated clear liquid is discharged through the discharge pipe in a separated mode, and is discharged to the next treatment procedure for treatment, foam scum is flushed and discharged or scraped through the first cleaning port, and iron mud at the bottom of the treatment tank is cleaned through the second cleaning port.
2. The process for treating waste liquid from polytetrahydrofuran production according to claim 1, wherein a thin rubber layer is arranged between the upper sealing partition plate and the second built-in partition plate and between the lower sealing partition plate and the first built-in partition plate.
3. The process for treating waste liquid in polytetrahydrofuran production according to claim 2, wherein the upper sealing partition plate and the second built-in partition plate are obliquely arranged relative to the horizontal plane, a first cleaning opening positioned at the lower end of the upper sealing partition plate is formed in the top end of the treatment tank, and a first cover plate is hinged in the first cleaning opening.
4. The process for treating waste liquid generated in the production of polytetrahydrofuran according to claim 1, wherein the bubble outlet assembly comprises a coiled pipe arranged at the bottom of the treatment tank, an air inlet pipe is communicated with the coiled pipe, a plurality of arc-shaped air outlet pipes communicated with the inside of the coiled pipe are fixed on the surface of the coiled pipe, and a plurality of arc-shaped air outlet pipes are distributed at equal intervals along the bending curve of the coiled pipe.
5. The process for treating waste liquid in polytetrahydrofuran production according to claim 4, wherein the output port of the arc-shaped air outlet pipe is downward, a gap is arranged between the output port of the arc-shaped air outlet pipe and the bottom of the treatment tank, an inclined plane is arranged at the bottom of the treatment tank, a second cleaning port positioned at the lower end of the inclined plane is arranged on the side wall of the treatment tank, and a second cover plate is hinged in the second cleaning port.
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