CN205500962U - Can realize manufacturing equipment of calcium chloride and potassium sulphide waste water retrieval and utilization - Google Patents
Can realize manufacturing equipment of calcium chloride and potassium sulphide waste water retrieval and utilization Download PDFInfo
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- CN205500962U CN205500962U CN201520983328.XU CN201520983328U CN205500962U CN 205500962 U CN205500962 U CN 205500962U CN 201520983328 U CN201520983328 U CN 201520983328U CN 205500962 U CN205500962 U CN 205500962U
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Abstract
The utility model provides a pair of can realize manufacturing equipment of calcium chloride and potassium sulphide waste water retrieval and utilization, manufacturing equipment includes, A) calcium chloride waste water retrieval and utilization manufacturing equipment: each is directly delivered to with waste water and the pipeline of the water process of waste water and corresponding delivery pump can be directly utilized, still including the reaction section effluent water sump of retrieving waste water, the reaction section effluent water sump passes through the pipeline and receives waste water to through sewage pipe and pump, deliver to filter press with sewage, filter press's output and well cross current, the normal water that forms after the filter -pressing in through the water pipe carry into clean water basin, the input of second filter pass through the clarified water pump and with the clean water pipe of clarified water pump intercommunication with the clean water basin intercommunication, the output of second filter utilizes the sewer line and well water pitcher intercommunication of potassium sulphide, the output of well water pitcher passes through the soft water accumulator intercommunication in pump, pipeline and safety filter ware and potassium sulphide manufacturing plant room, B, ) potassium sulphide waste water retrieval and utilization manufacturing equipment: with waste water carry to the pipeline of first filter and pump, with first filter intercommunication the soft water accumulator, the soft water accumulator communicates with each other with the salt acid absorption system of potassium sulphide production.
Description
Technical field
This utility model relates to waste water recycling process in a kind of Chemical Manufacture, and especially a kind of calcium chloride and sulfur are joined potassium and produced waste water recycling process.
Background technology
Potassium sulfate is a kind of important basic chemical raw materials, inorganic chemical industry is used as to manufacture the raw material of the potassium salt such as potassium carbonate, potassium alum, and can widely apply in each chemical industry, agriculturally, potassium sulfate is main chlorideless potassic fertilizer, also it is the important supplement source of sulfur needed for crops, is to apply most agriculturals to help fertilizer at present.Use Mannheim proeess to carry out more the production of existing potassium sulfate, reacted in mannheim furnace by potassium chloride and sulphuric acid, generate potassium sulfate and the hydrogen chloride gas of high temperature, absorption system water need to be entered absorb, generate hydrochloric acid, in absorption process, need to inject substantial amounts of water.
Calcium chloride is typical ion-type halogenide, it it is white solid under room temperature, widely applying in the saline used by refrigeration plant, road ice melting agent and desiccant produce, calcium chloride and hydrate thereof and solution all have important using value in many aspects such as food manufacturing, construction material, medical science and biologys.In Calcium Chloride Production, it is most commonly that employing double decomposition, by limestone and hydrochloric acid effect, generates calcium chloride solution, after having reacted, reheat, evaporate, be dehydrated, through granulating working procedure, obtain calcium chloride granules.Because of in process of production, need to use substantial amounts of hydrochloric acid, and limestone itself also has certain impurity, the most it is not strict with the concentration of hydrochloric acid, more existing large chemical complexes can use the technique of potassium sulfate and calcium chloride Joint Production, generates the hydrochloric acid of high concentration for reacting with limestone during utilizing potassium sulfate production, generates calcium chloride, so can make full use of the concentrated hydrochloric acid that the purity in potassium sulfate production is the highest, reduce enterprise's production cost.
But, in joint process, substantial amounts of waste water can be produced, especially during Calcium Chloride Production, granulating working procedure produces substantial amounts of time condensation water, i.e. waste water needs to process, and general method is by direct discharging of waste water, also the calcium chloride of trace is contained in time condensation water, directly discharge, cause waste, and due to environmental requirement, the discharge of brine waste is limited, intractability is big, there is no effective processing method yet, for avoiding environmental pollution, discharge after not only needing waste water is processed, also need to plan waste water treatment region and the waste water treatment process equipment that floor space is bigger, processing cost is the highest, and in process of production, need also to also need to introduce substantial amounts of water for producing, also enterprise's production cost is further increased.
Utility model content
This utility model main purpose is to solve the problems referred to above and deficiency, it is provided that a kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling.
For achieving the above object, the technical solution of the utility model is:
nullA kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling，Described process equipment includes，A) Calcium Chloride Production waste water recycling process equipment: be fed directly to waste water respectively to directly utilize the pipeline by water conservancy project sequence of waste water and corresponding delivery pump，Also include the reaction process cesspool reclaiming waste water，Described reaction process cesspool receives waste water by pipeline，And by soil pipe and pump，Sewage is delivered to filter press，The outfan of described filter press and middle cross current，In the middle water warp formed after filter pressing, water pipe is delivered into clear water reserviors，The input of the second filter is connected with described clear water reserviors by clarified water pump and the clear water pipe that connects with described clarified water pump，The outfan of described second filter utilizes the sewer line of potassium sulfate to connect with middle water pot，The outfan of described middle water pot passes through pump、Pipeline and cartridge filter connect with the soft water accumulator tank of potassium sulfate production Factory Building；B) potassium sulfate production waste water recycling process equipment: waste water being delivered to the pipeline of the first filter and described soft water accumulator tank that pump connects with described first filter, described soft water accumulator tank communicates with the absorption by Hydrochloric Acid system of potassium sulfate production.
nullA) Calcium Chloride Production waste water recycling process equipment，Including: it is directly sent to waste water respectively to directly utilize the pipeline by water conservancy project sequence of waste water and corresponding delivery pump，Also include，The reaction process cesspool being linked in sequence by pipeline、Filter press、Clear water reserviors、Second filter、Middle water pot、Cartridge filter and soft water accumulator tank，Wherein，Described reaction process cesspool receives waste water by pipeline，Its outlet is connected with the input of described filter press by soil pipe and pump，The outfan of described filter press and middle cross current，The middle water formed after filter pressing is delivered into described clear water reserviors through described middle water pipe，The input of described second filter is connected with described clear water reserviors by clarified water pump and the clear water pipe that connects with described clarified water pump，The outfan of described second filter utilizes the sewer line in potassium sulfate production waste water recycling process to connect with described middle water pot，The outfan of described middle water pot passes sequentially through pump、Pipeline and cartridge filter connect with described soft water accumulator tank；Described soft water accumulator tank is the soft water accumulator tank in potassium sulfate production waste water recycling process equipment；
B) potassium sulfate production waste water recycling process equipment: the first filter, soft water accumulator tank and the absorption by Hydrochloric Acid system being linked in sequence by pipeline, wherein, produce waste water by pipelined to the first filter, first filter outlet connects with described soft water accumulator tank, and the port of export of described soft water accumulator tank communicates with the described absorption by Hydrochloric Acid system of potassium sulfate production；
Described Calcium Chloride Production waste water recycling process equipment is connected with described sulfuric acid production wastewater reuse technology equipment by the sewer line in potassium sulfate production waste water recycling process and described soft water accumulator tank.
Further, described filter press utilizes the compressed air rinsing filter cloth that external pipeline introduces.
Further, it is parallel with a water diversion tank by pipeline between described soil pipe and pump.
Further, it is parallel with a water diversion tank by pipeline between described clear water pipe and clarified water pump.
Further, described second filter is also communicated with backwash pipeline, and the waste water produced after backwash is delivered into by backwashing sewage water pipe states reaction process cesspool.
Further, described backwash pipeline is connected with the sewer line of the potassium sulfate of the outfan of described second filter.
Further, the outfan of described second filter connects effusion meter.
Further, described middle water pot is also associated with the condensate piping of Calcium Chloride Production.
Further, arranging in-site measurement bimetallic thermometer on described middle water pot, the measuring thermal resistance thermometer of teletransmission, with regard to earth magnetism flap level gauge, for monitoring the teletransmission list flange liquid level transmission device of liquid level, the teletransmission PH analysis meter of water ph value in monitoring.
Further, described reaction process cesspool and soft water accumulator tank set far transmission level meter, monitor liquid level, and two position is reported to the police, and low liquid level is closed down correspondence and sent pump outside.
In sum, a kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling provided by the utility model, use existing conventional equipment, and the pipeline in existing production can be made full use of, improve easy, it is easily achieved so that the waste water in calcium chloride and potassium sulfate production can be fully used, saves enterprise's production cost.
Accompanying drawing illustrates:
Fig. 1: potassium sulfate production waste water recycling process device connection diagram；
Fig. 2: Calcium Chloride Production waste water recycling process device connection diagram；
Wherein: pipeline 1, time condensation water pump 2, hot water circuit pond 3, high temperature cooling tower 4, absorb water delivery pump 5, PE filter 6, choline tank 7, CO2 gas alkali cleaning equipment 8, ashing water pot 9, ashing water pump 10, ashing melting machine 11, wash water tank 12, wash water pump 13, each wash water point device 14, granulating working procedure cesspool 15, granulating working procedure dredge pump 16, thick calcium liquid storage tank 17, reaction process cesspool 18, filter press 19, reaction process clear water reserviors 20, second filter 21, middle water pot 22, middle water pump 23, cartridge filter 24, tank field cesspool 25, tank field hydrochloric acid absorption tower 26, tank field sewage pump 27, tank field Water spray pump 28, soft water accumulator tank 29, absorption by Hydrochloric Acid equipment 30, cesspool 31, sewage pump 32, first filter 33
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model technological process is described in further details.
nullFor solving shortcoming present in existing calcium chloride and potassium sulfate production process，This utility model provides a kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling，Described process equipment includes，A) Calcium Chloride Production waste water recycling process equipment: be fed directly to waste water respectively to directly utilize the pipeline 1 by water conservancy project sequence of waste water and corresponding delivery pump，Also include the reaction process cesspool 18 reclaiming waste water，Described reaction process cesspool receives waste water by pipeline 1，And by soil pipe and sewage pump，Sewage is delivered to filter press 19，The outfan of described filter press 19 and middle cross current，In the middle water warp formed after filter pressing, water pipe is delivered into clear water reserviors，The input of the second filter 21 is connected with described clear water reserviors by clarified water pump and the clear water pipe that connects with described clarified water pump，The outfan of described second filter 21 utilizes the sewer line of potassium sulfate to connect with middle water pot 22，The outfan of described middle water pot 22 passes through middle water pump 23、Pipeline 1 and cartridge filter 24 connect with the soft water accumulator tank 29 of potassium sulfate production Factory Building；B) potassium sulfate production waste water recycling process equipment: waste water being delivered to the pipeline 1 of the first filter and described soft water accumulator tank 29 that pump connects with described first filter, described soft water accumulator tank 29 communicates with the absorption by Hydrochloric Acid equipment 30 of potassium sulfate production.
nullA) Calcium Chloride Production waste water recycling process equipment，Including: it is directly sent to waste water respectively to directly utilize the pipeline 1 by water conservancy project sequence of waste water and corresponding delivery pump，Also include，The reaction process cesspool 18 being linked in sequence by pipeline 1、Filter press 19、Clear water reserviors 20、Second filter 21、Middle water pot 22、Cartridge filter 24 and soft water accumulator tank 29，Wherein，Reaction process cesspool 18 receives waste water by pipeline 1，Its outlet is connected with the input of filter press 19 by soil pipe and pump，The outfan of filter press 19 and middle cross current，The middle water formed after filter pressing is delivered into clear water reserviors 20 through described middle water pipe，The input of the second filter 21 is connected with clear water reserviors 20 by clarified water pump and the clear water pipe that connects with clarified water pump，The outfan of the second filter 21 utilizes the sewer line in potassium sulfate production waste water recycling process to connect with middle water pot 22，The outfan of middle water pot 22 passes sequentially through pump、Pipeline and cartridge filter 24 connect with soft water accumulator tank 29；Soft water accumulator tank 29 is the soft water accumulator tank 29 in potassium sulfate production waste water recycling process equipment；
B) potassium sulfate production waste water recycling process equipment: the first filter 33, soft water accumulator tank 29 and the absorption by Hydrochloric Acid system 30 being linked in sequence by pipeline, wherein, produce waste water by pipelined to the first filter 33, first filter 33 outlet connects with soft water accumulator tank 29, and the port of export of soft water accumulator tank 29 communicates with the absorption by Hydrochloric Acid equipment 30 of potassium sulfate production；
Calcium Chloride Production waste water recycling process equipment is connected with described sulfuric acid production wastewater reuse technology equipment by the sewer line in potassium sulfate production waste water recycling process and soft water accumulator tank 29.
Current domestic Production in Chemical Plant potassium sulfate many employings Mannheim proeess is carried out, and it is a kind of maturation process that Mannheim proeess produces potassium sulfate, does not repeats them here.After production terminates, will produce substantial amounts of high-temp chlorination hydrogen, high-temperature gas enters absorption by Hydrochloric Acid equipment 30 after cooling depositing dust, in existing production, is usually and introduces the tap water absorbing hydrogen chloride gas of low temperature in absorption by Hydrochloric Acid equipment 30 and form hydrochloric acid.During potassium sulfate production, potassium sulfate production waste water mostlys come from the upper overhaul of the equipments of production and the waste water of daily cleaning equipment, typically can be emitted after brine waste after treatment by this effluent part.And in this utility model, as shown in Figure 1, during potassium sulfate production, being provided with first filter 33 in potassium sulfate production device, the waste water of production overhaul of the equipments and the generation of daily cleaning equipment is temporary in entering cesspool 31, is periodically entered the first filter 33 by sewage pump 32 and filters, filter out the turbidity in sewage, enter soft water accumulator tank 29 after waste water filtering, and be again introduced into absorption by Hydrochloric Acid equipment 30 reuse of potassium sulfate production device, it is achieved recycling of potassium sulfate production waste water.Owing to potassium sulfate production is more stable, maintenance frequency is the highest, annual recovery waste water about 100m3。
In this utility model, Calcium Chloride Production is also adopted by the compound decomposition method of existing maturation, i.e. reacts with limestone with hydrochloric acid, prepares calcium chloride, and this production method is also prior art, does not repeats them here.In process of production, produce substantial amounts of time condensation water, in existing technique, time condensation water also serves as waste water and disposes (time condensation water hereinafter is waste water), and in this utility model, time condensation water is stored in time condensation water pot, with time condensation water pump 2, deliver to the operation respectively needing use water during Calcium Chloride Production, it is achieved the reuse of Calcium Chloride Production waste water.During this utility model is with Calcium Chloride Production, producing time condensation water in normal production is 288m3As a example by/d, the comprehensive recycling that time condensation water during Calcium Chloride Production i.e. produces waste water is introduced.
As in figure 2 it is shown, the main source of the waste water of calcium chloride device reuse is the time condensation water of system.Being collected by time condensation water in system into time condensation water pot, the amount of secondary vapour condensed water is 12m3/ h, i.e. 288m3/ d, time condensation water is pumped up to following procedures:
S1, wherein 10m3/ d time condensation water is delivered to, in the wash water tank 12 of granulating working procedure, deliver to each wash water point device 14 through wash water pump 13, for the flushing of device.Flushing waste water is recycled to granulating working procedure cesspool 15, and reclaims the 2m in flushing waste water3/ d enters ashing operation through granulating working procedure dredge pump 16 and pipeline 1, for ashing water pot 9 moisturizing in ashing operation, and remaining 8m3/ d sends the thick calcium liquid storage tank 17 of calcium chloride response system back to, i.e. returns main flow, reclaims the calcium chloride in flushing waste water.
Produce in the past in, for guaranteeing normally to produce, production equipment needs periodic cleaning, and if clean with water, rinse water also will emit after processing as waste water.And this utility model utilizes the time condensation water that should be discharged to be rinsed, and flushing water is returned in the production system of calcium chloride, on the one hand improve production efficiency, on the other hand precipitate is returned to production procedure, improve production efficiency and improve production capacity.
In this utility model, only need to be by 8m3The dissolution process being mostly used in calcium chloride granules of/d flushing waste water, it is ashing water pot 9 moisturizing that the flushing waste water of remainder can deliver to ashing operation, is 2m in the present embodiment3/ d, with abundant Appropriate application flushing waste water, does not produce waste.
S2, wherein 2m3/ d time condensation water is used for ashing operation ashing water pot 9 moisturizing.
Plus the flushing waste water added in S1, total 4m3The waste water of/d is used for ashing operation ashing water pot 9 moisturizing, and ashing water, after ashing water pot 9 caches, is delivered to ashing melting machine 11 through ashing water pump 10 and reacted with quick lime, and the ash breast obtained is for neutralizing the pH value of the calcium chloride solution that acid calcium reaction generates.
The flushing waste water temperature entering ashing operation ashing water pot 9 from S1 after flusher is relatively low, for improving ashing speed, supplements two condensed waters in the S2 of part high temperature, and two-way moisturizing mixes, for ashing water pot 9 moisturizing after respectively enteing ashing water pot 9.
Although on chemical theory, hydrochloric acid reacts with limestone, generates calcium chloride, if proportioning raw materials is suitable, raw material reacts completely, is one and neutralizes reaction, and on the product theory obtained, pH value should be close to 7.But it is long to realize reacting completely required time in actual production, therefore, for controlling the production time, improve production efficiency, actual production typically can be treated as limestone and react the most completely, product discharged at monitoring pH value about during 45.But product contains a certain amount of hydrochloric acid reacted the most completely, entirety, in acidity, can produce certain corrosion and the other burden to equipment, and follow-up equipment also can be caused the biggest corrosion by acid medium.For solving this problem, this utility model utilizes part time condensation water to deliver to ashing operation ashing water pot 9 moisturizing, and ashing water, after ashing water pot 9 caches, is delivered to ashing melting machine 11 through ashing water pump 10 and reacted with quick lime:
CaO+H2O=Ca (OH)2
Obtain in alkalescence with Ca (OH)2Grey breast for main body is delivered in the product that acid calcium reacts, owing to ash breast is in a liquid state, it is easy for controlling reaction process, can the pH value of quick neutralized reaction product, generate calcium chloride simultaneously, effectively reduce the response time, improve production efficiency, improve yield further, pH value is adjusted to about 8 the most at last, close to neutral, the product corrosion to equipment can be reduced, extend the life-span of production equipment.
S3, deliver to acid calcium reaction process: wherein 6m3/ d time condensation water delivers to the washing for PE filter 6 of the acid calcium reaction process, and the waste water washed enters reaction process cesspool 18；Wherein 2m3/ d time condensation water is delivered to acid calcium reaction process and is entered CO for choline tank 7 moisturizing, the alkali liquor (soda ash solution) that choline tank 7 dissolves2Gas alkali cleaning equipment 8, produces CO for acid calcium reaction2The caustic wash process of gas, the high concentration washing water discharge after alkali cleaning, enter reaction process cesspool 18；
Meanwhile, enter reaction process cesspool 18 also has ground, haulage vehicle flushing water, through about 20m3/d。
Time condensation water (6m for the washing of acid calcium reaction process PE filter 63/ d), for choline tank 7 high concentration wash water draining (2m3/ d), and ground, haulage vehicle flushing water (20m3/ d) all enter reaction process cesspool 18 through trench, reaction process clear water reserviors 20 are entered after filter press 19 filter pressing, water pot 22 in entering after the second filter 21 filters again, middle water in middle water pot 22, after cartridge filter 24 filters, the soft water accumulator tank 29 of potassium sulfate production Factory Building is delivered to, as the wash water of absorption by Hydrochloric Acid equipment 30 by middle water pump 23.
During cleaning PE filter 6, substantial amounts of insoluble matter, impurity may be produced, such as the SiO contained in the limestone reacted the most completely, limestone2, the CaSO that generates in the reaction owing to hydrochloric acid purity is the highest4Deng, after insoluble matter or the impurity that these large volumes are fallen in filter press 19 filter pressing, insoluble matter or the impurity of small size is filtered out again through the second filter 21, during the middle water formed enters, water pot 22 is kept in, when needing, the soft water accumulator tank 29 of gas washing in SA production Factory Building is delivered to, as the wash water of absorption by Hydrochloric Acid equipment 30 after cartridge filter 24 filters.Middle water pot 22 is set, the time condensation water handled well can be made to be cached, according to the needs of productive temp, regularly, quantitatively, it is achieved stable conveying, make conveying have record, it is to avoid waste；In order to prevent front-end-of-line, because of operational error etc. and filtration because causing is the most thorough, thus block absorption by Hydrochloric Acid equipment 30 and filter hole, thus cartridge filter 24 is set and plays the effect again filtered, avoid newly generated clogging deposits absorption by Hydrochloric Acid equipment 30, cause device damage, produce unnecessary stopping production, affect whole productive temp, affect yield and production capacity.
S4, remaining 268m3/ d time condensation water delivers to hot water circuit pond 3, and after high temperature cooling tower 4 lowers the temperature (being down to 30 DEG C from 90 DEG C), evaporation capacity is 26m3/ d, remaining 242m3/ d time condensation water, delivers to the soft water accumulator tank 29 of potassium sulfate production Factory Building, as the wash water of absorption by Hydrochloric Acid equipment 30 through absorbing water delivery pump 5.This part water accounts for the overwhelming majority of Calcium Chloride Production waste water, owing to being substantially free of solid impurity in two condensed waters, therefore directly can be transported to the soft water accumulator tank 29 of potassium sulfate production Factory Building by water pump, and need not move through filter and filter.
In potassium sulfate production storing process, the sewage in tank field cesspool 25 includes flushing waste water and waste water of unloading, and quantity of wastewater effluent is about 1m3/ d, tank field hydrochloric acid absorption tower 26 includes the hydrochloric acid absorbing the tank deck volatilization of 6 hydrochloric acid tanks in tank field, and quantity of wastewater effluent is about 1m3/ d, delivers to middle water pot 22 with tank field sewage pump and tank field Water spray pump 28 respectively.This effluent part water yield is less, and impurities is less, is directly entered middle water pot 22, delivers to the soft water accumulator tank 29 of potassium sulfate production Factory Building after cartridge filter 24 again.
In this utility model, the waste water of potassium sulfate production is before entering soft water accumulator tank 29, during in Calcium Chloride Production, the waste water of entrance reaction process cesspool 18 enters after filtering through filter press 19 before water pot 22, it is both needed to filter through the second filter 21, and the middle water in middle water pot 22 was also required to cartridge filter 24 before entering soft water accumulator tank 29, in this utility model, each filter uses microfilter, all realize the effect that small-bore is filtered, in actual applications, the filter of any form can be used, including, but not limited to microfilter, it is as the criterion so that identical purpose can be realized, because filter kind is more, numerous to list herein.
When implementing this utility model, whole joint production process uses DCS to control, point main control room and two kinds of control rooms of each device control station.Setting unified DCS main control room in producing control building, device each to on-site is monitored；It is all provided with control station room in potassium sulfate production device, Calcium Chloride Production device.
Waste water processes and the robot control system(RCS) of Treated sewage reusing accesses in existing robot control system(RCS) nearby.
All cesspools, tank etc. are all provided with far transmission level meter, monitor liquid level, and two position is reported to the police, and low liquid level is closed down correspondence and sent pump outside.
Second filter 21, the import and export of cartridge filter 24 arrange differential pressure transmitter, the service condition of monitor filter, when differential pressure exceedes setting value, and PE filter 6 auto-flushing.
Arranging in-site measurement bimetallic thermometer on middle water pot 22, the measuring resistance and temperature of teletransmission, with regard to earth magnetism flap level gauge, teletransmission list flange liquid level transmission device, teletransmission PH analysis meter.Thermal resistance thermometer is coolant-temperature gage in monitoring；PH splitter table is water ph value in monitoring, and high point is reported to the police and closes down middle water pump 23, it is to avoid the impact on potassium sulphate plant absorption by Hydrochloric Acid equipment 30 of the high pH value；Fluid level transmitter is used for monitoring liquid level, and two position is reported to the police, and low liquid level closes down middle water pump 23.
For realizing the waste water recycling process that this utility model provides, in production process, the process equipment needed mainly includes time condensation water i.e. waste water according to technique needs, deliver to respectively to directly utilize the pipeline 1 by water conservancy project sequence of waste water and corresponding delivery pump, at on-site, cesspool is set, it is usually reaction process cesspool 18, receive the waste water during Calcium Chloride Production, other waste water of on-site discharge into reaction process cesspool 18 also by trench simultaneously, water in reaction process cesspool 18 is passed through soil pipe by sewage pump, enter pressure filter and connect liquid bath, after filter press 19 filter pressing, in warp, water pipe is drained into the clear water reserviors of on-site.Compressed air is introduced by pipeline 1, the filter cloth of filter press 19 is carried out routine cleaning, and in the exit of filter press 19, middle water pipe is drawn pipe string 1, connects filter cloth service sink, the waste water after filter cloth being carried out or filter press 19 is carried out, by pipeline 1, it is drained in filter cloth service sink, the solid dirt of discharge, is transported to sheet frame mud stockyard.
Enter the middle water in clear water reserviors, through clarified water pump and the clear water pipe that is connected with clarified water pump, deliver to the second filter 21 filter further, the outfan of the second filter 21 directly utilizes potassium sulfate production sewer line and connects with middle water pot 22, second filter 21 is communicated with backwash tube, second filter 21 can be carried out backwash, the waste water produced after backwash enters reaction process cesspool 18 by backwashing sewage water pipe through trench.In this utility model, second filter 21 is provided with two, a preparation and a use, one is normally carried out filter operation, and another is standby, and backwash tube is connected with the soil pipe of potassium sulfate production Factory Building, utilize and carry out backwash operation from the second filter 21 middle water out, periodic replacement mode of operation, can when not stopping production timely backwash the second filter 21, raising filter effect and production efficiency.For production safety, the outfan at the second filter 21 is additionally provided with effusion meter, detects flow, is the most stably delivered to middle water pot 22.
From the second filter 21 middle water out water pot 22 through the soil pipe of potassium sulfate production Factory Building enters, from the second filter 21 middle water out, temperature is relatively low, for making middle water pot 22 production safety in the winter time, middle water pot 22 is also communicated with buried condensate piping, introduces the condensed water of high temperature.The middle water of water pot 22 in entrance, through pipeline 1, the soft water accumulator tank 29 of transport pump to potassium sulfate production factory family, in order to prevent front-end-of-line, because of operational error etc. and filtration because causing is the most thorough, thus block absorption by Hydrochloric Acid equipment 30 and filter hole, thus before entering soft water accumulator tank 29, also need again to filter through cartridge filter 24, it is to avoid newly generated clogging deposits absorption by Hydrochloric Acid equipment 30 warp.
The impurity that cartridge filter 24 filters out is less, and therefore the cleaning frequency of cartridge filter 24 can be relatively long, and is not required to additionally arrange backwash tube, owing to impurity is few, therefore backwashing water water is few, can directly discharge after backwash, or is recycled to reaction process cesspool 18.
During potassium sulfate production, the waste water producing overhaul of the equipments and the generation of daily cleaning equipment enters after the first filter 33 filters also into soft water accumulator tank 29 through pipeline 1 and pump.
In this utility model, each sewage pump and clarified water pump use centrifugal pump, therefore between each sewage pump and soil pipe, also distinguish a water diversion tank in parallel between clarified water pump and clear water pipe, it is provided that power source.According to producing needs, it is possible to use other are without the pump of power source.Being connected by pipeline 1 between each equipment and between equipment with each pond, for guaranteeing that produce in the winter time is smoothed out, pipeline 1 also needs to do antifreeze process, pipeline 1 outer cladding insulation material.
This utility model is during whole waste water recycling, in addition to water route pipeline 1, water pump, do not increase special equipment, only use conventional visible pump, filter and middle water pot 22, utilizing insoluble matter, the filtration of impurity that filter realizes in waste water, including water pump, these filters, middle water pot 22 also can be applied in existing general chemical enterprise process technique before sewage discharge, therefore so that process modification is simple.It is correspondingly provided with valve on each pipeline 1, controls duty.
The waste water produced in the joint process of calcium chloride and potassium sulfate after treatment, respectively enters each water conservancy project sequence, and as a example by potassium sulphate plant planning production capacity is 80,000 tons/year, the unit consumption of absorption by Hydrochloric Acid water is 1.2m3/ t, in potassium sulfate production, the consumption of absorption by Hydrochloric Acid water is 96000m3/a.By operating the years of 330 days based on natural law, calcium chloride device, tank field Treated sewage reusing reclaim and for the water yield of hydrochloric acid and the summation of potassium sulphate plant Treated sewage reusing are:
(242+30) × 330+100=898603m/a
The water yield that potassium sulfate production absorption by Hydrochloric Acid is not enough is supplemented with tap water.
According to embodiment of the present utility model, in whole production process, with potassium sulphate plant planning production capacity be 80,000 tons/year, the water yield of Calcium Chloride Production time condensation water is as 12m3/ h, i.e. 288m3/ d, year operated as a example by 330 days, in joint process, can bring following benefit:
(1) usage amount that can reduce tap water is as follows:
1. absorption by Hydrochloric Acid water: 89860m3/a；
2. acid calcium reaction process PE filter 6 wash water: 6m3/d；
3. acid calcium reaction process choline tank 7 moisturizing: 2m3/d；
4. ashing operation ashing water pot 9 moisturizing: 4m3/d；
5. make the wash water of material process each point: 10m3/d；
6. acid calcium reaction process PE filter 6 wash water: 6m3/d；
Add up to water saving: 99100m3/a。
(2) amount reducing production waste discharge every day is as follows:
1. time condensation water: 288m3/d；
2. acid calcium reaction process PE filter 6 wash water: 6m3/d；
3. acid calcium reaction process choline tank 7 draining: 2m3/d；
4. make the wash water draining of material process each point: 10m3/d；
5. ground, haulage vehicle flushing water: 20m3/d；
6. tank field cesspool 25 sewage: 1m3/d；
7. tank field hydrochloric acid absorption tower 26 wash water: 1m3/d。
Add up to and reduce wastewater discharge: 108240m3/a。
(3) calcium chloride is reclaimed:
1. make the sewage in material process cesspool to deliver to, in ashing operation ashing water pot 9 and acid calcium reaction process thick calcium flow container, be equivalent to return the main production system of calcium chloride.In sewage, calcium content is about 3% (wt%), helps recyclable calcium chloride:
10 × 3%=0.3t/d；
2. in calcium chloride time condensation water, the calcium Han calcification is about 0.8% (wt%), according to Fig. 2, removes outside granulating working procedure wash water system water, and the part delivering to ashing operation ashing water pot 9 is equivalent to return the production system of calcium chloride；Remaining all enters the absorption by Hydrochloric Acid operation of potassium sulfate production Factory Building with water.And in this utility model, the hydrochloric acid of absorption is used for acid calcium reaction, there is following reaction, so part time condensation water has returned to the production system of calcium chloride the most indirectly.
2HCl+CaCO3=CaCl2+H2O+CO2↑
Therefore, total recovery calcium chloride:
[(268+6+2+2) × 0.8%+0.3] × 330=832.92t/a；
Folding product two water polo grain calcium:
832.92 × 147/111=1103t/a.
Wherein, not very because adding quick lime for the calcium chloride volume increase brought to neutralize pH value.
(4) hydrochloric acid is reclaimed:
The waste water that in tank field cesspool 25, in sewage and absorption by Hydrochloric Acid equipment 30, hydrochloric acid absorption tower absorbs, all delivers to be used as in middle water pot 22 the absorption water of potassium sulfate production Factory Building, containing HCl about 2% (wt%) in above-mentioned sewage and wash water.Therefore implementing this utility model, can add HCl altogether, folding concentration is the hydrochloric acid of 32%:
2 × 2%/32% × 330=41.25t/a.
In sum, a kind of calcium chloride provided by the utility model and potassium sulfate production waste water recycling process, in whole production process, the time condensation water produced during utilizing Calcium Chloride Production, through reasonable distribution, respectively water conservancy project sequence is used during delivering to calcium chloride and potassium sulfate production respectively, in whole technique, produce waste water constantly to circulate in production process, waste water is made full use of, greatly reduce the consumption of tap water in production process, thus reduce production cost, and a part of calcium chloride can be reclaimed, to improve the productivity of calcium chloride, simultaneously because non-wastewater discharge, on the one hand environmental protection is conducive to, on the other hand production cost is reduced further, the production equipment of the waste water recycling process that this utility model provides, use existing conventional equipment, and the pipeline in existing production can be made full use of, improve easy, easily realize.
As it has been described above, combine the plan content given by accompanying drawing, similar technical scheme can be derived.In every case it is the content without departing from technical solutions of the utility model, any simple modification, equivalent variations and modification above example made according to technical spirit of the present utility model, all still fall within the range of technical solutions of the utility model.
Claims (10)
1. the process equipment that can realize calcium chloride and potassium sulfate production waste water recycling, it is characterised in that: described process equipment includes,
nullA) Calcium Chloride Production waste water recycling process equipment，Including: it is directly sent to waste water respectively to directly utilize the pipeline by water conservancy project sequence of waste water and corresponding delivery pump，Also include，The reaction process cesspool being linked in sequence by pipeline、Filter press、Clear water reserviors、Second filter、Middle water pot、Cartridge filter and soft water accumulator tank，Wherein，Described reaction process cesspool receives waste water by pipeline，Its outlet is connected with the input of described filter press by soil pipe and pump，The outfan of described filter press and middle cross current，The middle water formed after filter pressing is delivered into described clear water reserviors through described middle water pipe，The input of described second filter is connected with described clear water reserviors by clarified water pump and the clear water pipe that connects with described clarified water pump，The outfan of described second filter utilizes the sewer line in potassium sulfate production waste water recycling process to connect with described middle water pot，The outfan of described middle water pot passes sequentially through pump、Pipeline and cartridge filter connect with described soft water accumulator tank；Described soft water accumulator tank is the soft water accumulator tank in potassium sulfate production waste water recycling process equipment；
B) potassium sulfate production waste water recycling process equipment: the first filter, soft water accumulator tank and the absorption by Hydrochloric Acid system being linked in sequence by pipeline, wherein, produce waste water by pipelined to the first filter, first filter outlet connects with described soft water accumulator tank, and the port of export of described soft water accumulator tank communicates with the described absorption by Hydrochloric Acid system of potassium sulfate production；
Wherein, described Calcium Chloride Production waste water recycling process equipment is connected with described potassium sulfate production waste water recycling process equipment by the sewer line in potassium sulfate production waste water recycling process and described soft water accumulator tank.
A kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling, it is characterised in that: described filter press utilizes the compressed air rinsing filter cloth that external pipeline introduces.
A kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling, it is characterised in that: it is parallel with a water diversion tank by pipeline between described soil pipe and pump.
A kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling, it is characterised in that: it is parallel with a water diversion tank by pipeline between described clear water pipe and clarified water pump.
A kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling, it is characterized in that: described second filter is also communicated with backwash pipeline, the waste water produced after backwash is delivered into by backwashing sewage water pipe states reaction process cesspool.
A kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling, it is characterised in that: described backwash pipeline is connected with the sewer line of the potassium sulfate of the outfan of described second filter.
A kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling, it is characterised in that: the outfan of described second filter connects effusion meter.
A kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling, it is characterised in that: described middle water pot is also associated with the condensate piping of Calcium Chloride Production.
A kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling, it is characterized in that: on described middle water pot, in-site measurement bimetallic thermometer is set, the measuring thermal resistance thermometer of teletransmission, with regard to earth magnetism flap level gauge, for monitoring the teletransmission list flange liquid level transmission device of liquid level, the teletransmission PH analysis meter of water ph value in monitoring.
A kind of process equipment realizing calcium chloride and potassium sulfate production waste water recycling, it is characterized in that: described reaction process cesspool and soft water accumulator tank set far transmission level meter, monitoring liquid level, two position warning, low liquid level is closed down correspondence and is sent pump outside.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108279658A (en) * | 2018-04-04 | 2018-07-13 | 上海天坛助剂有限公司 | Persulfate process units DCS control systems and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108279658A (en) * | 2018-04-04 | 2018-07-13 | 上海天坛助剂有限公司 | Persulfate process units DCS control systems and control method |
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Effective date of registration: 20181022 Address after: 266043 78 Licang four North Road, Licang District, Qingdao, Shandong Co-patentee after: Qingdao soda industry Potash Fertilizer Technology Co., Ltd. Patentee after: QINGDAO SODA ASH INDUSTRIAL DEVELOPMENT CO., LTD. Address before: 266043 78 Licang four North Road, Licang District, Qingdao, Shandong Patentee before: QINGDAO SODA ASH INDUSTRIAL DEVELOPMENT CO., LTD. |
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