CN218146237U - Waste liquid treatment system - Google Patents
Waste liquid treatment system Download PDFInfo
- Publication number
- CN218146237U CN218146237U CN202222162051.7U CN202222162051U CN218146237U CN 218146237 U CN218146237 U CN 218146237U CN 202222162051 U CN202222162051 U CN 202222162051U CN 218146237 U CN218146237 U CN 218146237U
- Authority
- CN
- China
- Prior art keywords
- waste liquid
- liquid
- unit
- tank
- ammonia
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Physical Water Treatments (AREA)
Abstract
The utility model relates to a technical field that industrial waste liquid retrieves and recycles discloses a waste liquid treatment system, solves relevant in-process at production thiodipropionic acid, and the alkaline waste liquid that the condensation process produced and the acid waste liquid that the process of hydrolysising produced can not the integrated processing's problem, and it is including the neutralization unit of intercommunication alkaline waste liquid and acid waste liquid, the downstream junction of neutralization unit has the purification unit, the downstream junction of purification unit has the deamination unit, still be connected with concentrated unit on the deamination unit, realize carrying out the integrated processing to acid waste liquid and alkaline waste liquid from this and retrieve and recycle.
Description
Technical Field
The application relates to the technical field of industrial waste liquid treatment, in particular to a waste liquid treatment system.
Background
A condensation process and a hydrolysis process are required to be sequentially carried out in the process of producing thiodipropionic acid; alkaline waste liquid containing sodium hydroxide is generated in the condensation process, the alkaline waste liquid is separated in a layered mode and is placed into an alkaline liquid pool, and acidic waste liquid containing ammonium sulfate and sulfuric acid generated in the hydrolysis process is separated in a crystallization suction filtration mode and is placed into an acidic liquid pool; the alkaline waste liquid produced in the condensation step and the acidic waste liquid produced in the hydrolysis step cause environmental pollution if not treated.
The related waste liquid treatment mode is only to adopt separate equipment to treat the acidic waste liquid or adopt separate equipment to treat the alkaline waste liquid, and the equipment function treatment is single, can not systematically separate multiple substances existing in the waste liquid and handle.
SUMMERY OF THE UTILITY MODEL
In order to realize the comprehensive treatment to acid waste liquid and alkaline waste liquid, the application provides a waste liquid treatment system.
The application provides a waste liquid treatment system adopts following technical scheme:
the utility model provides a waste liquid treatment system, is including the neutralization unit of intercommunication alkaline waste liquid and acid waste liquid, the low reaches of neutralization unit are connected with the purification unit, the low reaches of purification unit are connected with the deamination unit, still be connected with concentrated unit on the deamination unit.
By adopting the technical scheme, the alkaline waste liquid for preparing the thiodipropionic acid contains sodium hydroxide, the acidic waste liquid contains ammonium sulfate and sulfuric acid, the acidic waste liquid and the alkaline waste liquid are sent into the neutralization unit for neutralization, the sulfuric acid and the sodium hydroxide are subjected to neutralization reaction in an acidic environment, the waste liquid after the neutralization reaction contains sodium sulfate and ammonium sulfate and enters the purification unit, the purification unit firstly filters the waste liquid entering the deamination unit, mechanical impurities are filtered, and the deamination unit can remove ammonia nitrogen in the waste liquid and form an ammonia water product; the concentration unit is used for concentrating sulfate generated after the waste liquid is neutralized to obtain a sulfate product, and part of water generated by the concentration unit is recycled to realize comprehensive treatment and recycling of the waste liquid.
Optionally, the neutralization unit includes a neutralization tank, and an alkaline liquid pool for containing alkaline waste liquid and an acid liquid pool for containing acidic waste liquid are connected to the upstream of the neutralization tank respectively.
By adopting the technical scheme, the acid waste liquid in the acid liquid pool and the alkaline waste liquid in the alkaline liquid pool are subjected to neutralization reaction in the neutralization tank to form sodium sulfate and water, so that the subsequent units can better remove ammonia nitrogen conveniently.
Optionally, the purification unit includes a wastewater circulation tank, the wastewater circulation tank is connected with a hydrogen peroxide tank, the upstream of the wastewater circulation tank is connected with a neutralization tank, and the downstream of the wastewater circulation tank is connected with a filter press.
Through adopting above-mentioned technical scheme, the purification unit gets rid of sulphur simple substance and mechanical impurity in to the waste liquid, contains ammonium sulfate and sodium sulfate in the waste liquid that gets into in the waste water circulating tank, lets in hydrogen peroxide solution to the waste water circulating tank, and ammonium sulfate in the waste water is through hydrogen peroxide solution oxidation, makes the bivalent sulphur oxidation become sulphur simple substance, carries out the filter-pressing through the pressure filter again, makes sulphur simple substance and mechanical impurity in the waste liquid filtered out, makes the waste liquid that gets into the deamination unit purer.
Optionally, the downstream of the filter press is connected with an ammonia-containing water tank for storing the purified waste liquid.
Through adopting above-mentioned technical scheme, the waste liquid after the pressure filter filters gets into containing the ammonia water pitcher, contains the ammonia water pitcher and temporarily stores the waste liquid, makes things convenient for follow-up to deamination unit feed liquor.
Optionally, the deamination unit is including strip deamination tower, condenser and ammonia absorption tower, the upper reaches of strip deamination tower are connected with containing the ammonia water pitcher, strip deamination tower and contain and be connected with liquid alkali jar between the ammonia water pitcher, the condenser is located the low reaches of strip deamination tower, the ammonia absorption tower is located the low reaches of condenser.
Through adopting above-mentioned technical scheme, when the waste liquid that contains in the ammonia water pitcher flows in to the strip deamination tower, liquid caustic soda jar provides alkaline environment to the waste liquid that gets into in the strip deamination tower, makes ammonium ion convert into free ammonia, and the free ammonia in the hot steam in the strip deamination tower shifts the gaseous phase from the liquid phase with the free ammonia in the waste liquid, contains the condensation of ammonia hot steam through the condenser, and the water reflux that condenses to strip deamination tower, and the ammonia gas gets into the ammonia absorption tower to the ammonia nitrogen desorption in the waste liquid.
Optionally, an ammonia water tank is connected to the downstream of the ammonia gas absorption tower.
Through adopting above-mentioned technical scheme, ammonia gets into and is absorbed by water and form the aqueous ammonia behind the ammonia absorption tower, and the aqueous ammonia product that obtains gets into the aqueous ammonia case and stores.
Optionally, the concentration unit includes an MVR evaporator, and an upstream of the MVR evaporator is connected to a stripping deamination tower.
By adopting the technical scheme, after ammonia nitrogen in the waste liquid enters a gas phase from a liquid phase, the waste liquid also contains sodium sulfate, and the sodium sulfate can be evaporated and concentrated by an MVR evaporator to realize the recycling of the sodium sulfate.
Optionally, the MVR evaporator is connected with a recycling pipe and a salt box.
By adopting the technical scheme, the waste liquid treated by the MVR evaporator is concentrated to form sodium sulfate and water, the water is recycled to the reaction kettle for producing thiodipropionic acid by the recycling pipe, the water is recycled, and the sodium sulfate product enters the salt box for storage.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the method comprises the following steps of (1) feeding the acidic waste liquid and the alkaline waste liquid into a neutralization unit for neutralization, wherein the sulfuric acid and the sodium hydroxide are subjected to neutralization reaction in an acidic environment, the waste liquid after the neutralization reaction contains sodium sulfate and ammonium sulfate and enters a purification unit, the purification unit firstly purifies the waste liquid entering a deamination unit, and filters out large-particle mechanical impurities, and the deamination unit can remove ammonia nitrogen in the waste liquid and form an ammonia water product; the concentration unit is used for concentrating sulfate generated after the waste liquid is neutralized to obtain a sulfate product, and part of water generated by the concentration unit is recycled to realize recycling of the waste liquid;
2. the method comprises the following steps that a purification unit removes elemental sulfur and mechanical impurities in waste liquid, the waste liquid entering a waste water circulation tank contains ammonium sulfate and sodium sulfate, hydrogen peroxide is introduced into the waste water circulation tank, the ammonium sulfate in the waste water is oxidized by the hydrogen peroxide to oxidize bivalent sulfur into elemental sulfur, and the elemental sulfur and the mechanical impurities in the waste liquid are filtered out through a filter press in a filter pressing manner, so that the waste liquid entering a deamination unit is purer;
3. when the waste liquid in the water tank containing ammonia flows to the stripping deamination tower, the liquid alkali tank provides an alkaline environment for the waste liquid entering the stripping deamination tower, so that ammonium ions are converted into free ammonia, the free ammonia in the waste liquid is transferred to a gas phase from a liquid phase by hot steam in the stripping deamination tower, the hot steam containing ammonia is condensed by a condenser, the condensed water flows back to the stripping deamination tower, and the ammonia enters an ammonia absorption tower, so that the ammonia nitrogen in the waste liquid is removed.
Drawings
FIG. 1 is a flow diagram of a waste liquid treatment system.
Description of the reference numerals: 1. a neutralization unit; 11. a neutralization tank; 12. an acid liquor pool; 13. an alkaline solution pool; 2. a purification unit; 21. a wastewater circulation tank; 22. a filter press; 23. a first liquid pump; 24. an ammonia-containing water tank; 25. a hydrogen peroxide tank; 251. a second liquid pump; 3. a deamination unit; 31. stripping deamination tower; 311. a liquid inlet pipe; 312. a liquid outlet pipe; 32. a third liquid pump; 33. a liquid caustic soda tank; 331. a fourth liquid pump; 34. a condenser; 35. an ammonia gas absorption tower; 351. an ammonia water tank; 4. a concentration unit; 41. an MVR evaporator; 411. a recycling pipe; 412. and (4) a salt box.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses a waste liquid treatment system.
Referring to fig. 1, the arrows in fig. 1 are pointing to represent the gas and liquid flow directions. The utility model provides a waste liquid treatment system includes neutralization unit 1, and neutralization unit 1's low reaches are connected with purification unit 2, and purification unit 2's low reaches are connected with the deamination unit 3 of getting rid of ammonia nitrogen in the waste liquid, still are connected with concentrated unit 4 on the deamination unit 3, and concentrated unit 4 separates the water and the inorganic salt in the waste liquid.
Because can produce alkaline waste liquid and acid waste liquid respectively in the condensation of production thiodipropionic acid and the hydrolysis process, alkaline waste liquid is the aqueous solution that contains sodium hydroxide, acid waste liquid is the aqueous solution that contains sulphuric acid and ammonium sulfate, throw into acid waste liquid and alkaline waste liquid ration neutralization unit 1 with acid waste liquid and carry out the neutralization, then it filters to get into purification unit 2 impurity in the waste liquid, make the waste liquid that gets into deammoniation unit 3 purer, deammoniation unit 3 realizes separating ammonia nitrogen and sodium sulfate in the waste liquid, the ammonia gas is absorbed by water and forms the aqueous ammonia, the sodium sulfate is concentrated by concentration unit 4 and forms solid-state sodium sulfate, the water that produces is retrieved and is continued to produce thiodipropionic acid, realize waste liquid comprehensive treatment and recovery and recycle.
The neutralization unit 1 comprises a neutralization tank 11, an acid liquid tank 12 and an alkali liquid tank 13, wherein the neutralization tank 11 is positioned at the downstream of the acid liquid tank 12 and the alkali liquid tank 13, the alkali liquid tank 13 is filled with alkaline waste liquid, the alkaline waste liquid is an aqueous solution containing sodium hydroxide generated in a condensation process in the production process of dipropionic sulfate, the acid liquid tank 12 is filled with acidic waste liquid, the acidic waste liquid is an aqueous solution containing sulfuric acid and ammonium sulfate generated in a hydrolysis process in the production process of thiodipropionic acid, and the acidic waste liquid and the alkaline waste liquid are quantitatively pumped into the neutralization tank 11 to perform neutralization reaction in the neutralization tank 11 to generate an aqueous solution containing sodium sulfate and ammonium sulfate.
Referring to fig. 1, the purification unit 2 includes a wastewater circulation tank 21 connected downstream of the neutralization tank 11, a filter press 22 connected downstream of the wastewater circulation tank 21, a first liquid pump 23 provided between the wastewater circulation tank 21 and the filter press 22, a waste liquid in the wastewater circulation tank 21 is pumped into the filter press 22 by the first liquid pump 23, and an ammonia-containing water tank 24 connected downstream of the filter press 22.
The purification unit 2 further comprises a hydrogen peroxide tank 25 connected with the wastewater circulation tank 21, wherein hydrogen peroxide solution is filled in the hydrogen peroxide tank 25, the hydrogen peroxide tank 25 is positioned at the upstream of the wastewater circulation tank 21, a second liquid pump 251 is arranged between the hydrogen peroxide tank 25 and the wastewater circulation tank 21, and hydrogen peroxide is pumped into the wastewater circulation tank 21 from the hydrogen peroxide tank 25 through the second liquid pump 251; waste liquid that flows out from neutralization tank 11 gets into waste water circulation tank 21, at this moment, hydrogen peroxide solution is gone into to the ration pump in the waste water circulation tank 21, ammonium sulfate in the waste liquid is oxidized by hydrogen peroxide solution, form the elemental sulfur, the waste liquid that flows out from the waste water circulation tank 21 gets into pressure filter 22, pressure filter 22 filters mechanical impurity and the elemental sulfur in the waste liquid, the waste liquid that makes the deamination unit 3 that gets into is purer, the waste liquid after being filtered by pressure filter 22 gets into containing ammonia water tank 24 and keeps in, store the waste liquid for follow-up deamination unit 3, the waste liquid that contains in the ammonia water tank 24 is the aqueous solution that contains ammonium sulfate and sodium sulfate.
Referring to fig. 1, deamination unit 3 includes stripping deamination tower 31 that is located the low reaches of ammonia-containing water tank 24, be equipped with between stripping deamination tower 31 and the ammonia-containing water tank 24 and carry out the feed liquor pipe 311 of feed liquor to stripping deamination tower 31, install third liquid pump 32 on feed liquor pipe 311, waste liquid in the ammonia-containing water tank 24 is pumped into stripping deamination tower 31 through third liquid pump 32, still be connected with liquid caustic soda jar 33 on stripping deamination tower 31's feed liquor pipe 311, be equipped with fourth liquid pump 331 between liquid caustic soda jar 33 and stripping deamination tower 31's feed liquor pipe 311, liquid caustic soda in liquid caustic soda jar 33 is pumped into the feed liquor pipe 311 of deamination tower 31 through fourth liquid pump 331, liquid caustic soda jar 33 provides alkaline environment for getting into in stripping deamination tower 31 waste liquid, make the ammonium ion in the waste liquid convert into free ammonia, let in stripping deamination tower 31 in heat steam, make the free ammonium in the waste liquid heat become ammonia steam.
The low reaches of strip deammoniation tower 31 are connected with condenser 34, the low reaches of condenser 34 are connected with ammonia absorption tower 35, ammonia tank 351 is connected with in the low reaches of ammonia absorption tower 35, the ammonia vapor that deviates from in strip deammoniation tower 31 gets into condenser 34 condensation, water after the condensation flows back to strip deammoniation tower 31, ammonia vapor flows out strip deammoniation tower 31 from the top and gets into in condenser 34, ammonia continues to flow and gets into ammonia absorption tower 35, ammonia absorption tower 35 lets in deionized water and absorbs ammonia, ammonia reacts with water and forms the aqueous ammonia, the aqueous ammonia finally gets into ammonia tank 351 and stores, the aqueous ammonia in the aqueous ammonia tank 351 is the commodity aqueous ammonia at this moment, can be applied to industrial production and use.
Referring to fig. 1, the concentration unit 4 comprises an MVR evaporator 41, the upstream of the MVR evaporator 41 is connected to a stripping deamination tower 31, the bottom of the stripping deamination tower 31 is connected to a liquid outlet pipe 312, one end of the liquid outlet pipe 312 far away from the stripping deamination tower 31 is communicated with the MVR evaporator 41, one end of the MVR evaporator 41 far away from the stripping deamination tower 31 is provided with a recycling pipe 411, and the downstream of the MVR evaporator 41 is further connected to a salt box 412; after ammonia nitrogen in the waste liquid is removed by the stripping deamination tower 31, the waste liquid containing sodium sulfate enters the MVR evaporator 41 from the liquid outlet pipe 312, the MVR evaporator 41 evaporates and concentrates the waste liquid containing sodium sulfate to form solid sodium sulfate, and the solid sodium sulfate enters the salt box 412 for storage, wherein the sodium sulfate in the salt box 412 is commercial sodium sulfate and can be used in industrial production; the water evaporated by the MVR evaporator 41 flows out through the recycling pipe 411 as distilled water and can be recycled to the production of thiodipropionic acid, so that the waste liquid can be recycled.
The implementation principle of a waste liquid treatment system of the embodiment of the application is as follows:
in the production process of thiodipropionic acid, a condensation process is required firstly, and then a hydrolysis process is required, wherein an alkaline waste liquid generated in the condensation process is put into an alkaline liquid tank 13, and an acidic waste liquid generated in the hydrolysis process is put into an acidic liquid tank 12.
When the waste liquid is subjected to environment-friendly regeneration treatment, acidic waste liquid and alkaline waste liquid are respectively and quantitatively pumped into a neutralization tank 11 for neutralization reaction, the reacted waste liquid contains ammonium sulfate and sodium sulfate, the waste liquid flowing out of the neutralization tank 11 enters a waste water circulating tank 21, hydrogen peroxide is pumped into the waste water circulating tank 21 by a hydrogen peroxide tank 25 to oxidize bivalent sulfur in the waste liquid into elemental sulfur, a subsequent pressure filter 22 is convenient to filter mechanical impurities and elemental sulfur in the waste liquid, the waste liquid entering a stripping deamination tower 31 is purified, the deamination effect and the service life of the stripping deamination tower 31 are ensured, the waste liquid filtered by the pressure filter 22 can enter an ammonia-containing water tank 24 for storage, liquid is convenient to enter the stripping deamination tower 31 in a subsequent process, ammonia nitrogen in the waste liquid is separated out in the stripping deamination tower 31 and enters an ammonia absorption tower 35 after being condensed by a condenser 34, and is absorbed by water in the ammonia absorption tower 35 to form commercial ammonia water, so that deamination of the waste liquid is realized; the waste liquid in the stripping deamination tower 31 flows out from the liquid outlet pipe 312 to the MVR evaporator 41 for evaporation and concentration, a sodium sulfate product and distilled water are evaporated, and the distilled water is recycled to the production of thiodipropionic acid through the recycling pipe 411, so that the comprehensive treatment and recycling of the acidic waste liquid and the alkaline waste liquid are realized.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A waste liquid treatment system, its characterized in that: the device comprises a neutralization unit (1) for communicating alkaline waste liquid and acidic waste liquid, wherein the downstream of the neutralization unit (1) is connected with a purification unit (2), the downstream of the purification unit (2) is connected with a deamination unit (3), and the deamination unit (3) is also connected with a concentration unit (4).
2. The liquid waste treatment system according to claim 1, wherein: the neutralization unit (1) comprises a neutralization tank (11), and the upstream of the neutralization tank (11) is respectively connected with an alkaline liquid pool (13) for containing alkaline waste liquid and an acid liquid pool (12) for containing acidic waste liquid.
3. The liquid waste treatment system according to claim 2, wherein: the purification unit (2) comprises a wastewater circulating tank (21), a hydrogen peroxide tank (25) is connected to the wastewater circulating tank (21), the upstream of the wastewater circulating tank (21) is connected with a neutralization tank (11), and the downstream of the wastewater circulating tank (21) is connected with a filter press (22).
4. A liquid waste treatment system according to claim 3, wherein: and an ammonia-containing water tank (24) for storing the purified waste liquid is connected to the downstream of the filter press (22).
5. The liquid waste treatment system according to claim 4, wherein: deamination unit (3) are including strip deamination tower (31), condenser (34) and ammonia absorption tower (35), the upper reaches of strip deamination tower (31) are connected with containing ammonia water tank (24), strip deamination tower (31) and be connected with liquid caustic soda jar (33) between containing ammonia water tank (24), condenser (34) are located the low reaches of strip deamination tower (31), ammonia absorption tower (35) are located the low reaches of condenser (34).
6. The liquid waste treatment system according to claim 5, wherein: an ammonia water tank (351) is connected with the downstream of the ammonia gas absorption tower (35).
7. The liquid waste treatment system according to claim 1, wherein: the concentration unit (4) comprises an MVR evaporator (41), and the upstream of the MVR evaporator (41) is connected with a stripping deamination tower (31).
8. The liquid waste treatment system according to claim 7, wherein: the MVR evaporator (41) is connected with a recycling pipe (411) and a salt box (412).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222162051.7U CN218146237U (en) | 2022-08-17 | 2022-08-17 | Waste liquid treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222162051.7U CN218146237U (en) | 2022-08-17 | 2022-08-17 | Waste liquid treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218146237U true CN218146237U (en) | 2022-12-27 |
Family
ID=84550490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222162051.7U Active CN218146237U (en) | 2022-08-17 | 2022-08-17 | Waste liquid treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218146237U (en) |
-
2022
- 2022-08-17 CN CN202222162051.7U patent/CN218146237U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109319998B (en) | Near-zero emission treatment system and process for ternary precursor material production wastewater | |
| CN104609633A (en) | Method and device for utilizing sewage containing ammonia and sodium | |
| CN102503016B (en) | Device and method for treating ammonia nitrogen wastewater, recycling ammonia and preparing ammonium sulfate | |
| US5500098A (en) | Process for regeneration of volatile acids | |
| CN207537506U (en) | A kind of etching liquid treating system | |
| CN110981065A (en) | Treatment method of lithium battery industrial wastewater | |
| CN104355472B (en) | A kind of containing inorganic ammonium salt Waste Water Treatment, process technique and application thereof | |
| CN101525187A (en) | Method for concentrating titanium pigment waste acid | |
| CN107215996A (en) | A kind of recycling treatment system, processing method and the application of high concentration sodium salt waste water | |
| CN105540975B (en) | A kind of recycling processing method and its system of PCB circuit board etching waste liquor | |
| CN213388200U (en) | Lithium battery anode material precursor wastewater treatment system | |
| CN218146237U (en) | Waste liquid treatment system | |
| CN210736415U (en) | Be used for high salt ammonia nitrogen waste water zero release processing system | |
| CN217868418U (en) | Ammonia nitrogen wastewater treatment system | |
| CN107673539B (en) | Acidic wastewater treatment equipment and treatment method | |
| CN106744720B (en) | The circulation recycling system and its operation process of trichloroacetaldehyde by-product dilute sulfuric acid | |
| CN115432879A (en) | Sodium bromide wastewater treatment device and process thereof | |
| CN114230084A (en) | Ternary precursor wastewater treatment equipment and process | |
| CN210764418U (en) | Evaporation crystallization separation integration system | |
| CN108726606B (en) | Treatment method of catalyst production wastewater | |
| CN111892222A (en) | Ammonium sulfate wastewater recycling method | |
| CN111704291A (en) | Efficient treatment system and treatment process for benzofuranone wastewater | |
| CN106007138A (en) | Wet-method chromium alloy waste water treatment system | |
| CN101318630B (en) | Method for synthesizing sodium thiosulphate with cyanide wastewater in cartap production process | |
| CN204097263U (en) | Ammonia nitrogen wastewater purification and recovery system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |