CN217555963U - Comprehensive treatment device for ammonia-soda process alkaline residue waste liquid - Google Patents
Comprehensive treatment device for ammonia-soda process alkaline residue waste liquid Download PDFInfo
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Abstract
The utility model discloses a comprehensive treatment device for ammonia-soda process alkaline residue waste liquid, which comprises a cooling conversion reaction tank and a plurality of horizontal spiral centrifuges; the cooling conversion reaction tank comprises a tank body, an alkaline residue waste liquid feeding pipe is arranged at the upper part of one side of the tank body, and an alkaline residue waste liquid feeding pipe is arranged in the tank bodyThe mixed gas pipe is provided with mixed gas nozzles at intervals, and the upper part of the other side of the tank body is also provided with an alkaline residue waste liquid discharge pipe; the alkaline residue waste liquid discharge pipe is communicated with the feed inlet of one horizontal spiral centrifuge, the concentrated liquid discharge port of the horizontal spiral centrifuge is communicated with the feed inlet of the other horizontal spiral centrifuge, and correspondingly, the clear liquid discharge ports of the horizontal spiral centrifuges are reversely communicated in sequence. The utility model discloses a plurality of horizontal spiral centrifuge carry out continuous countercurrent washing to the caustic sludge waste liquid, can show to reduce and remain Cl ‑ Content, solving Cl ‑ The common problem of the industry that the too high content affects the recycling of the caustic sludge is difficult, and the consumption of the washing water can be greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of alkaline residue waste liquid treatment and specifically relates to a comprehensive treatment device of ammonia-soda process alkaline residue waste liquid is related to.
Background
Soda ash is an important raw material in various industries such as glass, soap making, spinning, papermaking, petrochemical industry and the like, and the yield of soda ash reflects the development level of the national chemical industry to a certain extent. The yield of soda ash in China has been kept above 2500 million tons for 2016, wherein the proportion of soda ash produced by an ammonia-soda process reaches above 60%. The ammonia-soda process takes limestone, sea salt, ammonia and the like as main raw materials, has the advantages of easily obtained raw materials, simple production process, good product quality, large-scale continuous production and the like, but because the utilization rate of the raw materials is low, a large amount of CaCl is inevitably generated in the ammonia distillation link in the production process 2 、NaCl、CaCO 3 、CaSO 4 And SiO 2 And the alkaline residue waste liquid with equal components. According to statistics, 10m is discharged when each 1 ton of soda ash is produced 3 The dry base alkaline residue contained in the alkaline residue waste liquid can reach 0.3 to 0.6 ton. At present, most of the alkali residue waste liquid is treated by adopting a damming and stockpiling mode, supernatant liquid of the waste liquid is discharged into the sea after natural clarification, and dry base alkali residue is stockpiled on site. The method not only occupies a large amount of land resources, but also causes serious influence on the surrounding environment by chloride ions and alkaline substances contained in the alkaline residue, and simultaneously causes huge resource waste, thereby seriously restricting the sustainable development of soda enterprises.
Under the pull of the high-speed development of the current domestic new energy industry, the demand of soda in China still keeps a higher level. Therefore, the research on the alkali residue resource utilization technology under the guidance of the ecological civilization construction concept is more and more focused, and the research progress of the alkali residue treatment and the research progress thereof in the technical fields of building materials, agriculture, environmental protection and the like is as follows:
1. utilization of building materials
The alkaline residue contains CaCO 3 、SiO 2 And the like, and is an important raw material for preparing building materials such as cement, concrete, cementing materials and the like. For example, the Chinese patent with the patent number 201410140623.9 discloses a high-alkali-residue-content baking-free alkali residue ceramsite and a manufacturing method thereof. The method can inhibit the dissolution of chloride ions in the alkaline residue, improve the strength of the ceramsite, and fully explore and utilize the potential value in the alkaline residue.
2. Preparation of building residue soil or soil conditioner
The alkaline residue has strong alkalinity and can be used for improving acid soil. For example, a chinese patent No. 201310430904.3 discloses a method for treating caustic sludge, which uses caustic sludge to prepare a potassium fertilizer, and includes processes of drying, mixing, roasting, leaching, filtering, crystallizing filtrate, alkali-dissolving and acidifying filter residue, etc. to fully utilize effective components in the caustic sludge and reduce the pollution of the caustic sludge to the environment. The invention discloses a method for manufacturing caustic sludge soil, which comprises the steps of carbonizing waste liquid and waste residue of a caustic plant, filter-pressing, airing, mixing with one or more of calcium-increasing ash, calcium-increasing residue, fly ash, loess, broken stone, returned stone and returned sand, and naturally airing to prepare the caustic sludge soil. The process has low cost, simple operation and stable product quality. The Chinese patent with the patent application number of 201610901997.7 discloses an alkaline residue wastewater treatment method, which is used for diluting alkaline residue, adding acid, oxidizing, deodorizing, flocculating, biochemically treating and the like. The process is simple, the treatment effect is improved, and the influence of the caustic sludge on the environment is reduced. The Chinese patent with the patent application number of 202010306725.9 discloses a method for preparing engineering soil by using ammonia-soda process alkaline residue, which comprises the following treatment processes: and carrying out slag settling treatment, concentration treatment, homogenization modification, dehydration treatment and stacking treatment on the alkaline residue to obtain the engineering soil. The process can consume a large amount of caustic sludge, but the main body of the caustic sludge soil is still the caustic sludge, so the influence of the caustic sludge on the environment is mainly determined by the influence of the caustic sludge on the environment.
3. Other ways of utilization
The alkaline residue has large pores and small particle size, and contains CaCO as main component 3 It can be used as industrial desulfurizer. After a series of treatment processes such as washing, separation, purification and the like, the caustic sludge can also be used for preparing high polymers or additives of rubber products with higher added values.
4. Alkaline residue washing and dewatering process
The Chinese invention patent with the patent number of 201410383247.6 discloses a method for preparing a dechlorinated caustic sludge mixture by utilizing ammonia-soda process caustic sludge and application thereof, and the method comprises the following steps: firstly, crushing and grinding return sand and return stone into return sand and return stone powder; soaking the returned sand and returned stone powder in water for 0.5-14 days to digest the calcined calcium oxide, and then mixing the digested returned sand and returned stone powder, caustic sludge and water; or, after mixing the returned sand and returned stone powder, the alkaline residue and water, soaking for 0.5 to 14 days to digest the burnt calcium oxide; and carrying out filter pressing treatment to obtain the dechlorinated alkaline residue mixture with the chloride ion content being lower than 0.30 percent of the total solid mass in the mixture. Although the invention can obtain the alkaline residue mixture with low chlorine content, the process is complex, a large amount of waste water is generated, new pollution is generated, and the invention is not beneficial to environmental protection. Chinese invention patent with patent application number 202110340742.9 discloses a treatment process for stably dehydrating alkaline residue produced by ammonia-soda process, which takes the concentration of alkaline residue slurry as a reference, controls the concentration of the alkaline residue slurry to be in a process interval, then modifies the alkaline residue by adding a chemical conditioner to ensure that the alkaline residue meets related environmental protection indexes and reaches the I-type general industrial solid waste standard, then mechanically dehydrates the diluted alkaline residue to obtain the alkaline residue subjected to stable dehydration treatment, and simultaneously recovers alkaline residue clear liquid for dilution of the alkaline residue slurry. According to the invention, the concentration of the alkaline residue slurry is taken as the standard of the dilution degree of the alkaline residue slurry, so that the generation of the alkaline residue slurry in the dilution process is effectively reduced, the alkaline residue conditioning effect of the chemical conditioner is brought into full play, the waste of the chemical conditioner and water is avoided, and the dehydration cost is extremely high.
SUMMERY OF THE UTILITY MODEL
Based on the technical problem, the utility model provides a comprehensive treatment device of ammonia-soda process alkaline residue waste liquid.
The utility model discloses the technical solution who adopts is:
a comprehensive treatment device for ammonia-soda process alkaline residue waste liquid comprises a cooling conversion reaction tank and a plurality of horizontal spiral centrifuges; the cooling conversion reaction tank comprises a tank body, wherein an alkaline residue waste liquid feeding pipe is arranged at the upper part of one side of the tank body, a mixed gas pipe is arranged in the tank body, mixed gas nozzles are arranged on the mixed gas pipe at intervals, and an alkaline residue waste liquid discharging pipe is also arranged at the upper part of the other side of the tank body;
the number of the horizontal spiral centrifuges is four, and the four horizontal spiral centrifuges are respectively a first horizontal spiral centrifuge, a second horizontal spiral centrifuge, a third horizontal spiral centrifuge and a fourth horizontal spiral centrifuge;
the alkali residue waste liquid discharging pipe is communicated with a feeding hole of a first horizontal spiral centrifuge, a concentrated liquid discharging hole of the first horizontal spiral centrifuge is communicated with a feeding hole of a second horizontal spiral centrifuge through the first concentrated liquid discharging pipe, and a clear liquid discharging hole of the first horizontal spiral centrifuge is connected with a first clear liquid discharging pipe;
a concentrated solution discharge port of the second horizontal spiral centrifuge is communicated with a feed port of a third horizontal spiral centrifuge through a second concentrated solution discharge pipe, and a clear solution outlet of the second horizontal spiral centrifuge is communicated with a feed port of the first horizontal spiral centrifuge through a second clear solution discharge pipe;
a concentrated solution discharge port of the third horizontal spiral centrifuge is communicated with a feed port of the fourth horizontal spiral centrifuge through a third concentrated solution discharge pipe, and a clear solution outlet of the third horizontal spiral centrifuge is communicated with the first concentrated solution discharge pipe through a third clear solution discharge pipe;
and a concentrated liquid discharge port of the fourth horizontal spiral centrifuge is connected with a fourth concentrated liquid discharge pipe, and a clear liquid outlet of the fourth horizontal spiral centrifuge is communicated with the second concentrated liquid discharge pipe through the fourth clear liquid discharge pipe.
Preferably, a first material receiving bin communicated with a concentrated liquid discharge port on the first horizontal spiral centrifuge is arranged at the first horizontal spiral centrifuge, and the first concentrated liquid discharge pipe and the third clear liquid discharge pipe are both communicated with the first material receiving bin;
a second material receiving bin communicated with a concentrated liquid discharge port on the second horizontal spiral centrifuge is arranged at the second horizontal spiral centrifuge, and the second concentrated liquid discharge pipe and the fourth clear liquid discharge pipe are both communicated with the second material receiving bin;
and a third material receiving bin communicated with a concentrated solution discharge port on the third horizontal spiral centrifuge is arranged at the third horizontal spiral centrifuge, a third concentrated solution discharge pipe is communicated with the third material receiving bin, and the third material receiving bin is also communicated with a water inlet pipe.
Preferably, a part of the section body of the water inlet pipe is arranged in the tank body, and cooling water is introduced into the water inlet pipe.
Preferably, the mixed gas pipe is arranged along the side wall and the bottom of the tank body, and the mixed gas nozzles are arranged on the mixed gas pipe at equal intervals.
Preferably, a sealing cover is arranged at the upper part of the tank body, and an exhaust gas discharge port is arranged on the sealing cover.
Preferably, the fourth concentrate outlet pipe is connected to a fluidized bed dryer.
The utility model has the beneficial technical effects that:
(1) The utility model discloses with Ca in cooling conversion reaction tank 2+ Precipitated as CaCO 3 Recycle can carry out, and accessible heat exchange realizes the cooling of caustic sludge waste liquid and the intensification of washing water simultaneously.
(2) The utility model discloses a arrange the mist nozzle on gas mixing pipe, can also play good strength mixing effect when realizing even gas distribution.
(3) The utility model discloses a plurality of horizontal spiral centrifuge carry out continuous countercurrent washing to the caustic sludge waste liquid, can show the reduction and remain Cl-content, solve the too high trade commonality difficult problem that influences caustic sludge resource utilization of Cl-content, and the quantity of the washing water that still can significantly reduce when guaranteeing the washing effect.
(4) The utility model discloses equipment is simple, operation and maintenance cost are low.
Drawings
The present invention will be further explained with reference to the following detailed description and accompanying drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the top view structure of the tank body in the present invention, mainly showing the arrangement of the water inlet pipe and the mixed gas pipe;
fig. 3 is a schematic connection diagram of an embodiment of the first horizontal screw centrifuge and the first receiving bin of the present invention.
Detailed Description
The comprehensive treatment device for the ammonia-soda process alkaline residue waste liquid comprises a cooling conversion reaction tank and a plurality of horizontal spiral centrifuges. The cooling conversion reaction tank comprises a tank body 1, an alkali dreg waste liquid feeding pipe 2 is arranged on the upper portion of one side of the tank body 1, a mixed gas pipe 3 is arranged inside the tank body 1, mixed gas nozzles 4 are arranged on the mixed gas pipe 3 at intervals, and an alkali dreg waste liquid discharging pipe 5 is further arranged on the upper portion of the other side of the tank body 1. The number of the horizontal spiral centrifuges is four, and the four horizontal spiral centrifuges are respectively a first horizontal spiral centrifuge 6, a second horizontal spiral centrifuge 7, a third horizontal spiral centrifuge 8 and a fourth horizontal spiral centrifuge 9. The alkali residue waste liquid discharging pipe 5 is communicated with a feeding hole of a first horizontal spiral centrifuge 6, a concentrated liquid discharging hole of the first horizontal spiral centrifuge is communicated with a feeding hole of a second horizontal spiral centrifuge 7 through a first concentrated liquid discharging pipe 10, and a clear liquid discharging hole of the first horizontal spiral centrifuge is connected with a first clear liquid discharging pipe 11. The concentrated solution discharge port of the second horizontal spiral centrifuge 7 is communicated with the feed port of the third horizontal spiral centrifuge 8 through a second concentrated solution discharge pipe 12, and the clear solution outlet of the second horizontal spiral centrifuge 7 is communicated with the feed port of the first horizontal spiral centrifuge 6 through a second clear solution discharge pipe 13. And a concentrated solution discharge port of the third horizontal spiral centrifuge is communicated with a feed port of the fourth horizontal spiral centrifuge through a third concentrated solution discharge pipe 14, and a clear solution outlet of the third horizontal spiral centrifuge is communicated with the first concentrated solution discharge pipe 10 through a third clear solution discharge pipe 15. A concentrated liquid discharge port of the fourth horizontal spiral centrifuge 9 is connected with a fourth concentrated liquid discharge pipe 16, and a clear liquid outlet of the fourth horizontal spiral centrifuge is communicated with the second concentrated liquid discharge pipe 12 through a fourth clear liquid discharge pipe 17.
The utility model discloses a plurality of horizontal spiral centrifuge carry out continuous countercurrent washing to the caustic sludge waste liquid, can show to reduce and remain Cl - Content, solving Cl - The common problem of the industry that the too high content affects the recycling of the caustic sludge is difficult, and the use amount of washing water can be greatly reduced while the washing effect is ensured.
As right the utility model discloses a further design is provided with in 6 departments of first horizontal spiral centrifuge and connects feed bin 18 with the first of the last concentrate discharge gate intercommunication of first horizontal spiral centrifuge, first concentrate discharging pipe 10 and third clear liquid discharging pipe 15 all with first connect feed bin 18 to communicate. A second material receiving bin 19 communicated with a concentrated liquid discharge port on the second horizontal spiral centrifuge is arranged at the position of the second horizontal spiral centrifuge 7, and the second concentrated liquid discharge pipe 12 and the fourth clear liquid discharge pipe 17 are both communicated with the second material receiving bin 19. And a third material receiving bin 20 communicated with a concentrated solution discharge port on the third horizontal spiral centrifuge is arranged at the position of the third horizontal spiral centrifuge 8, the third concentrated solution discharge pipe 14 is communicated with the third material receiving bin 20, and the third material receiving bin 20 is also communicated with a water inlet pipe 21. The utility model discloses an it connects the feed bin to arrange in horizontal spiral centrifuge department, can make things convenient for the concentrate ejection of compact to and the concentrate mixes with the clear solution or the new water in the inlet tube against current.
Furthermore, a part of the section body of the water inlet pipe is arranged in the tank body, and cooling water is introduced into the water inlet pipe. The temperature of the alkaline residue waste liquid and the temperature of the washing water can be reduced through heat exchange.
Further, the mixed gas pipe 3 is arranged along the side wall and the bottom of the tank body, and the mixed gas nozzles 4 are arranged on the mixed gas pipe 3 at equal intervals. Through rationally arranging the mixed gas nozzle 4 on the mixed gas pipe 3, the even gas distribution can be realized and good pneumatic mixing effect can be played simultaneously.
Furthermore, a sealing cover 22 is arranged at the upper part of the tank body 1, and a waste gas discharge port 23 is arranged on the sealing cover 22, so that unreacted CO is convenient to react 2 And NH 3 And (4) recycling the mixed gas.
Furthermore, the fourth concentrate outlet pipe is connected to a fluidized bed dryer 24. Elevation by fluidized bed dryerDrying at a low temperature to further reduce Cl in the material - And (4) content.
The process flow for carrying out the comprehensive treatment on the ammonia-soda process alkaline residue waste liquid by adopting the device is as follows:
1. cooling and conversion of caustic sludge waste liquid
(1) Cooling of alkaline residue waste liquid
The caustic sludge waste liquid discharged from the ammonia still has higher temperature and enters a pool body 1 of the cooling conversion reaction pool through a caustic sludge waste liquid feeding pipe 2. And a snakelike cooling section of a water inlet pipe is arranged in the cooling conversion reaction tank, and cooling water is introduced into the snakelike cooling section and is used for cooling the alkaline residue waste liquid. The water in the water inlet pipe is new water, and is used for washing the subsequent alkaline residue slurry after being heated through heat exchange. The retention time of the caustic sludge waste liquid in the cooling conversion reaction tank is related to the flow of the waste liquid and the volume of the reaction tank, and is generally 5-20 min.
(2) CaCl in alkaline residue waste liquid 2 Transformation of (2)
1) Transformation mode and transformation agent source
In order to realize the residue of CaCl in the alkaline residue waste liquid 2 The CO generated in the heavy alkali calcination and mother liquor ammonia distillation preheating section in the production process of the calcined soda is recycled 2 And NH 3 As Ca 2+ Transforming agent for transforming CaCl in the alkaline residue waste liquid 2 All conversion to CaCO 3 And settling out.
2)CO 2 And NH 3 Delivery of mixed gases
CO 2 And NH 3 After being compressed, the mixture is fed into a cooling conversion reaction tank through a mixed gas pipe 3. In order to improve CaCl in the alkaline residue waste liquid 2 The conversion rate of (2) evenly arrange many the gas mixture pipes 3 of intercommunication at the lateral wall and the bottom of cooling conversion reaction tank, evenly arrange gas mixture nozzle 4 (can be 10 ~ 30 according to pipeline length) at a certain distance interval on every pipeline, can also play good strength mixing effect when realizing even gas distribution.
3)CO 2 And NH 3 Mixed gas flow control
In order to ensure CaCl in the alkaline residue waste liquid 2 Efficient and complete conversion of CO 2 And NH 3 The flow of the mixed gas is controlled by a valve attached to the pipeline, and the added dosage after being converted into molar weight is CaCl in the alkaline residue waste liquid 2 1.05 to 1.15 times of the molar weight.
4) Exhaust gas recovery
The upper part of the cooling conversion reaction tank is provided with a sealing structure, and unreacted CO 2 And NH 3 The mixed gas is discharged from the exhaust gas discharge port 23 and then used for the refining or ammonia absorption process of brine, so that CO is realized 2 And NH 3 And (5) recycling the mixed gas.
2. Washing of cooled and converted alkaline residue waste liquid
And discharging the cooled and converted alkali residue waste liquid from an alkali residue waste liquid discharge pipe 5 of the cooling and converting reaction tank, and sequentially washing the alkali residue waste liquid by a first horizontal spiral centrifuge 6, a second horizontal spiral centrifuge 7, a third horizontal spiral centrifuge 8 and a fourth horizontal spiral centrifuge 9.
And washing the alkali residue waste liquid in a continuous countercurrent mode, namely concentrating the alkali residue waste liquid by using a first horizontal spiral centrifugal machine 6, supplementing washing water into the concentrated liquid, and then feeding the concentrated liquid into a second horizontal spiral centrifugal machine 7 through a discharge pipe for next-stage concentration and washing, and so on. The concentrated solution centrifuged by the fourth horizontal screw centrifuge 9 is conveyed to the fluidized bed dryer 24 through the discharge pipe without being supplemented with washing water.
The flow direction of the washing water is opposite to the flow direction of the caustic sludge waste liquid. The first washing water is new water (which is beneficial to washing and removing soluble salt in the alkaline residue waste liquid) heated after flowing through the snakelike cooling section of the water inlet pipe, and is added to the discharge position of the third horizontal spiral centrifuge 8 to wash the concentrated solution discharged by the third horizontal spiral centrifuge 8. Clear liquid discharged from a discharge pipe of the fourth horizontal spiral centrifuge 9 is fed to a discharge position of the second horizontal spiral centrifuge 7 as second washing water to wash the concentrated liquid discharged from the second horizontal spiral centrifuge 7. Clear liquid discharged from a discharge pipe of the third horizontal spiral centrifuge 8 is fed as third washing water to the discharge pipe of the first horizontal spiral centrifuge 6And a material position, wherein the concentrated solution discharged from the first horizontal type spiral centrifugal machine 6 is washed. And taking clear liquid discharged from a discharge pipe of the second horizontal spiral centrifuge 7 as fourth washing water, feeding the fourth washing water to a feeding position of the first horizontal spiral centrifuge 6, and washing the alkaline residue waste liquid entering the first horizontal spiral centrifuge 6. The clear liquid discharged from the discharge pipe of the first horizontal spiral centrifuge 6 contains NH 4 And (4) returning Cl to the ammonia still for recycling.
The rotating speed and the inclination angle of each level of horizontal spiral centrifuge are adjustable, and the horizontal spiral centrifuge is used for controlling the washing effect of the alkaline residue waste liquid. In addition, the first washing water can be used as the water for the previous washing, a large amount of water resources can be saved, and the effective regulation and control of the washing effect can be realized by adjusting the flow of the new washing water.
3. Drying/dewatering of washed caustic sludge waste liquor
If the materials in the washed alkaline residue waste liquid need to be dried, the concentrated solution of the fourth horizontal type spiral centrifuge 9 enters a fluidized bed dryer 24 through a concentrated solution discharge pipe for high-temperature drying, the drying temperature is controlled at 130-160 ℃, and residual NH is convenient to carry out 4 Cl is decomposed and volatilized, so that Cl of the material can be further reduced - And (4) content.
Parts not described in the above modes can be realized by adopting or referring to the prior art.
Of course, the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and it should be noted that any equivalent substitution and obvious modification made by those skilled in the art under the teaching of the present specification fall within the essential scope of the present invention, and the protection of the present invention should be construed.
Claims (6)
1. The utility model provides a comprehensive processing apparatus of ammonia-soda process caustic sludge waste liquid which characterized in that: comprises a cooling conversion reaction tank and a plurality of horizontal spiral centrifuges; the cooling conversion reaction tank comprises a tank body, wherein an alkali dreg waste liquid feeding pipe is arranged at the upper part of one side of the tank body, a mixed gas pipe is arranged in the tank body, mixed gas nozzles are arranged on the mixed gas pipe at intervals, and an alkali dreg waste liquid discharging pipe is also arranged at the upper part of the other side of the tank body;
the number of the horizontal spiral centrifuges is four, and the four horizontal spiral centrifuges are respectively a first horizontal spiral centrifuge, a second horizontal spiral centrifuge, a third horizontal spiral centrifuge and a fourth horizontal spiral centrifuge;
the alkali residue waste liquid discharging pipe is communicated with a feeding hole of a first horizontal spiral centrifuge, a concentrated liquid discharging hole of the first horizontal spiral centrifuge is communicated with a feeding hole of a second horizontal spiral centrifuge through the first concentrated liquid discharging pipe, and a clear liquid discharging hole of the first horizontal spiral centrifuge is connected with a first clear liquid discharging pipe;
a concentrated solution discharge port of the second horizontal spiral centrifuge is communicated with a feed port of a third horizontal spiral centrifuge through a second concentrated solution discharge pipe, and a clear solution outlet of the second horizontal spiral centrifuge is communicated with a feed port of the first horizontal spiral centrifuge through a second clear solution discharge pipe;
a concentrated solution discharge port of the third horizontal spiral centrifuge is communicated with a feed port of the fourth horizontal spiral centrifuge through a third concentrated solution discharge pipe, and a clear solution outlet of the third horizontal spiral centrifuge is communicated with the first concentrated solution discharge pipe through a third clear solution discharge pipe;
and a concentrated liquid discharge port of the fourth horizontal spiral centrifuge is connected with a fourth concentrated liquid discharge pipe, and a clear liquid outlet of the fourth horizontal spiral centrifuge is communicated with the second concentrated liquid discharge pipe through the fourth clear liquid discharge pipe.
2. The integrated treatment device for the ammonia-soda process caustic sludge waste liquid according to claim 1, which is characterized in that: a first material receiving bin communicated with a concentrated liquid discharge port on the first horizontal spiral centrifuge is arranged at the first horizontal spiral centrifuge, and the first concentrated liquid discharge pipe and the third clear liquid discharge pipe are both communicated with the first material receiving bin;
a second material receiving bin communicated with a concentrated liquid discharge port on the second horizontal spiral centrifuge is arranged at the second horizontal spiral centrifuge, and the second concentrated liquid discharge pipe and the fourth clear liquid discharge pipe are both communicated with the second material receiving bin;
and a third material receiving bin communicated with a concentrated solution discharge port on the third horizontal spiral centrifuge is arranged at the third horizontal spiral centrifuge, a third concentrated solution discharge pipe is communicated with the third material receiving bin, and the third material receiving bin is also communicated with a water inlet pipe.
3. The integrated treatment device for the ammonia-soda process caustic sludge waste liquid according to claim 2, characterized in that: part of the section body of the water inlet pipe is arranged in the tank body, and cooling water is introduced into the water inlet pipe.
4. The integrated treatment device for the ammonia-soda process caustic sludge waste liquid according to claim 1, characterized in that: the mixed gas pipe is arranged along the side wall and the bottom of the pool body, and the mixed gas nozzles are arranged on the mixed gas pipe at equal intervals.
5. The integrated treatment device for the ammonia-soda process caustic sludge waste liquid according to claim 1, characterized in that: the upper part of the tank body is provided with a sealing cover, and the sealing cover is provided with a waste gas discharge port.
6. The integrated treatment device for the ammonia-soda process caustic sludge waste liquid according to claim 1, which is characterized in that: and the fourth concentrated liquid discharge pipe is connected with the fluidized bed dryer.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115520918A (en) * | 2022-06-27 | 2022-12-27 | 山东科技大学 | Comprehensive treatment process for ammonia-soda process alkaline residue waste liquid |
| CN115520918B (en) * | 2022-06-27 | 2024-05-03 | 山东科技大学 | Comprehensive treatment process of alkaline residue waste liquid by ammonia-soda process |
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