20results about "Ammonia compounds" patented technology

This utility model relates to an anti-clogging reactor for the resource recovery and preparation of ammonium sulfate from high-concentration ammonia-containing waste gas. The reactor body includes an absorption zone and a crystallization zone from top to bottom, with the crystallization zone and the absorption zone connected. The absorption zone is located above the liquid surface, and the crystallization zone is located below the liquid surface. The top of the absorption zone has a tail gas outlet, and the bottom of the crystallization zone has a crystal slurry outlet. An external Venturi reaction zone is located below the absorption zone of the reactor body, connected to the reactor body. The Venturi reaction zone has an inlet for the ammonia-containing waste gas and an inlet for the circulating absorbent liquid. The external Venturi reaction zone forms a primary absorption, reducing the intensity of the absorption reaction within the reactor and significantly improving the anti-clogging capability.

A system and method for ammonia production is disclosed. A system may generate a synthesis gas from a hydrocarbon and subsequently produce ammonia from the synthesis gas. The system includes a recuper

This invention discloses a sulfur tail gas resource recovery system, relating to the field of sulfur tail gas treatment technology. It includes an acidic water stripping unit, a sulfur tail gas treatment unit, and an ammonium sulfate preparation unit, as well as an ammonia water delivery unit, a negative pressure regulation unit, a detection unit, and a central control unit. Through the design of the central control unit, detection unit, extraction assembly, and variable diameter component, this invention effectively solves the problem of dynamic ammonia concentration distribution shift caused by upstream operating condition fluctuations in the acidic water stripping unit. This ensures that the extraction assembly is always aligned with the ammonia-rich area, guaranteeing the stability of ammonia water quality and the consistency of downstream desulfurization effects. Simultaneously, the passive flow-guiding characteristic of the variable diameter component structure allows the system to automatically expand its extraction range under high load conditions. Without relying on active moving parts for radial expansion, it achieves on-demand capture of high-concentration ammonia at the center of the tower, significantly improving ammonia resource recovery efficiency and energy utilization efficiency.

A process of dissociating ammonia into a dissociated hydrogen / nitrogen stream in catalyst tubes within a radiant tube furnace and an adiabatic or isothermal unit containing catalyst, along with downstream purification process units to purify the dissociated hydrogen / nitrogen stream into high purity hydrogen product.

The utility model discloses a system of ammonium sulfate separation and purification in electrolytic manganese residue, including mixed gas pipeline, heat exchanger a, heat exchanger b, heat exchanger c and multistage refrigerating unit, heat exchanger a, heat exchanger b and heat exchanger c are connected in proper order in series, and multistage refrigerating unit sends into cold medium heat exchange to heat exchanger a, heat exchanger b and heat exchanger c respectively, and mixed gas pipeline is linked with heat exchanger a, and the output of heat exchanger a, heat exchanger b and heat exchanger c is provided with gas -liquid separation tank a, gas -liquid separation tank b and gas -liquid separation tank c respectively. The system of ammonium sulfate separation and purification in electrolytic manganese residue, utilize the different characteristics of the boiling point of gaseous sulfuric acid, sulfur dioxide, ammonia and nitrogen in mixed gas, condense it respectively and gradually recycle, and component utilization is used in preparation sulfuric acid ammonium and nitrogen recovery, and sulfur dioxide is separated out, avoids because sulfur dioxide influence and reduces the recovery efficiency of ammonium sulfate.

The present disclosure is related to a pipe reactor. In its broadest aspect, the present disclosure is related to a method for producing a urea ammonium sulphate-based composition in a pipe reactor comprising a first and a second mixing zone. The method comprises the steps of: a) directing a liquid stream comprising ammonium bisulphate to the first mixing zone of the pipe reactor; b) directing a first stream of ammonia to the first mixing zone of the pipe reactor for reacting with the liquid stream comprising ammonium bisulphate, provided in step a), to obtain a liquid stream comprising ammonium sulphate; c) directing the liquid stream comprising ammonium sulphate, provided in step b), to the second mixing zone of the pipe reactor; and d) directing a liquid stream of urea to the second mixing zone of the pipe reactor for mixing with the liquid stream comprising ammonium sulphate.

The application discloses a system for producing pure concentrated ammonium sulfate by using a membrane contactor, which comprises a degassing unit and an absorption unit; the degassing unit comprises a degassing membrane contactor, an ammonia-nitrogen wastewater inlet channel connected with a wastewater inlet of the degassing membrane contactor, and a gas extraction pipeline connected with a gas phase outlet of the degassing membrane contactor; the ammonia-nitrogen wastewater inlet channel is connected with an ammonia-nitrogen wastewater tank; the absorption unit comprises an absorption membrane contactor, a waste sulfuric acid inlet channel connected with a waste sulfuric acid inlet of the absorption membrane contactor, and an ammonium sulfate production pipeline connected with a production outlet of the absorption membrane contactor; the waste sulfuric acid inlet channel is connected with a sulfuric acid circulating tank; the gas extraction pipeline is connected with an ammonia gas inlet of the absorption membrane contactor; and the ammonium sulfate production pipeline of the absorption membrane contactor produces ammonium sulfate. The system is simple and reliable, convenient to operate, can treat waste sulfuric acid and ammonia-nitrogen wastewater to generate usable pure ammonium sulfate, does not cause secondary pollution, has high concentration ratio, has high wastewater recycling rate, and has a wide application prospect.

This product enables the stable production of large-particle granular ammonium sulfate. [Solution] A method for producing granular ammonium sulfate, comprising: reacting an ammonia-containing gas with an aqueous sulfuric acid solution to form an aqueous ammonium sulfate solution; introducing the aqueous ammonium sulfate solution into a crystallization vessel; precipitating ammonium sulfate in the crystallization vessel to form granular ammonium sulfate; and withdrawing a slurry containing the granular ammonium sulfate from the bottom of the crystallization vessel, wherein the solid-liquid ratio at multiple heights in the crystallization vessel is measured, and the amount of slurry withdrawn is controlled based on a corrected solid-liquid ratio calculated from the solid-liquid ratios measured at the multiple heights.

A process and system to integrate a steam cracking unit with a blue ammonia unit such that a methane-rich gas stream and / or a hydrogen-rich gas stream is directed from the steam cracking unit to the blue ammonia unit while a hydrogen gas containing stream is directed from the blue ammonia unit to the steam cracking unit.

The application discloses a kind of based on mother liquor circulating flow reinforcement high-efficiency ammonium sulfate saturator system, including saturator main body, mother liquor circulating flow system and spraying device;The inside of the saturator main body is divided into spray zone and crystallization zone from top to bottom along the axial direction, the inlet of the mother liquor circulating flow system is communicated with the bottom of crystallization zone, and the outlet is connected with the spraying device at the top of spray zone, and the spraying device atomizes and evenly sprays mother liquor conveyed by the mother liquor circulating flow system.The application has the advantages compared with prior art: provide a kind of based on mother reinforcement high-efficiency ammonium sulfate saturator system for realizing the dynamic regulation and reinforcement of crystallization process.

This invention discloses a resource-based treatment method for acidic mother liquor wastewater from ferric phosphate, relating to the field of wastewater treatment technology. The specific process is as follows: the wastewater is pretreated with a ceramic membrane and then cooled using a heat exchanger; subsequently, it enters a primary acid membrane system for concentration under acidic conditions, with the concentrated water used to produce ammonium sulfate and ammonium phosphate; the primary permeate enters a secondary acid membrane system for deep purification, with the permeate reused and the concentrated water recycled. In this invention, the primary acid membrane is a polysulfonamide composite nanofiltration membrane prepared by interfacial polymerization, and the secondary acid membrane is a polyurea nanofiltration membrane prepared by interfacial polymerization with the addition of surfactants and catalysts. This method does not require pH adjustment and operates directly under strongly acidic conditions, achieving efficient separation, concentration, and resource recovery of sulfate and phosphate ions in the wastewater.

The application provides a crystallization device for treating ammonia-containing wastewater and recovering ammonium sulfate, and belongs to the technical field of ammonia-containing wastewater treatment. The device comprises an ammonia-containing wastewater storage tank, a reaction tank, a stirring assembly, a driving assembly, a transmission assembly and a piston assembly. The ammonia-containing wastewater storage tank and the reaction tank are placed side by side. Heating assemblies are arranged on the inner bottom of the ammonia-containing wastewater storage tank and the reaction tank. The stirring assembly is arranged inside the ammonia-containing wastewater storage tank and the reaction tank. The driving assembly is installed on the top of the reaction tank and is used to drive the stirring assembly to rotate, so as to stir the ammonia-containing wastewater in the ammonia-containing wastewater storage tank and the dilute sulfuric acid solution in the reaction tank. Compared with the prior art, the embodiment of the application can automatically complete the mixing reaction of the quantitative ammonia gas and the quantitative dilute sulfuric acid solution when the ammonia gas in the ammonia-containing wastewater is recovered and utilized, thereby improving the crystallization yield of ammonium sulfate.

This invention discloses a device for reducing the caprolactam content in finished ammonium sulfate products, comprising an amide oil storage tank, a condenser at the top of the tank, and a crystallizer fixedly connected to the bottom of the tank. The top of the crystallizer is connected to the bottom of the tank, and a first transfer pump is installed on one side of the crystallizer. A thickener is installed on the side wall of the first transfer pump. By adding a rinsing device inside the centrifuge, caprolactam adhering to the surface of ammonium sulfate crystals is effectively recovered. Based on the average operating data of the device over one month, the average caprolactam content in the recovered ammonium sulfate solution is 0.0863%wt, with an annual caprolactam recovery of approximately 777 tons. Based on market prices, the annual economic benefit is approximately 6.83 million yuan. The recovery of caprolactam significantly reduces resource waste, thereby lowering production costs and improving the economic benefits of enterprises. It also reduces the content of harmful substances in waste, which is beneficial to environmental protection and sustainable development.

The application discloses a kind of automatic separation system of ammonium sulphate circulating mother liquor and acid tar, it is related to ammonium sulphate circulating technical field, and its technical key points are: acid tar containing separator, it is connected with second, fourth overflow tank via overflow tank straight pipe, and there is separator control valve on fourth overflow tank pipeline;Third overflow tank is connected with mother liquor storage tank via second straight pipe, and overflow tank straight valve is arranged in pipe;Acid tar separator end is connected with mother liquor storage tank via mother liquor outlet pipe, and there is mother liquor outlet control valve on pipe;There are anti-mixing fixed plate and other components in separator, acid tar froth liquid level sleeve regulator is connected with tar overflow pipe;Acid tar overflow pipe is connected with acid tar secondary separation receiving tank, and there is large particle impurity filter screen in tank, bottom is connected with low-position mother liquor tank via valve and pipe, then is connected with mother liquor storage tank, also is connected with tar ammonia water clarification tank via valve, pipe and pump;The application can effectively realize the automatic separation of ammonium sulphate circulating mother liquor and acid tar, improve the quality of ammonium sulphate product, guarantee long-period stable operation of production, reduce production cost.

Disclosed herein are systems and methods from processing flue gas desulfurization (FGD) gypsum feedstock and ash feedstocks, either separately or together. FGD gypsum conversion comprises reacting FGD gypsum (e.g. calcium sulfate) feedstock, in either batch or continuous mode, with ammonium carbonate reagent to produce commercial products wherein the commercial products comprise ammonium sulfate and calcium carbonate. Ash conversion comprises a leach process followed by a precipitation process to selectively precipitate components at predetermined pHs resulting in metal hydroxides which may be optionally converted to oxides or carbonates. The processes may be controlled by use of one or more processors.

The present application relates to an integrated energy system coupling wind-solar-thermal-storage with water electrolysis-based hydrogen production, comprising: a wind-solar power generation unit, a thermal power generation unit, an energy storage unit, a hybrid hydrogen production unit, an air separation unit, an ammonia synthesis unit, a flue gas carbon capture unit, a methanol synthesis unit, an oxygen-enriched combustion unit, and an ammonia-doped combustion unit. In the integrated energy system coupling wind-solar-thermal-storage with water electrolysis-based hydrogen production, integrated coordinated operation of wind-solar-thermal-storage in combination with hydrogen production, ammonia production and alcohol production processes facilitates peak shaving, frequency regulation and voltage control, and ensures the stability and safety of a power system. Power generation from wind, solar and other renewable energy in combination with water electrolysis-based hydrogen production enables the production of cost-effective green hydrogen, utilizes surplus wind and solar resources, and reduces the phenomenon of wind and solar curtailment. Hybrid hydrogen production technology can effectively solve the problems of the intermittency and variability of wind and solar energy and the coupling between the wind and solar energy and hydrogen production equipment, achieve flexible hydrogen production, improve the efficiency of wind-solar power utilization, and enhance the overall stability of the system.

The present application relates to the technical field of organic waste treatment, and particularly discloses a method for acid-resistant two-phase circulating anaerobic digestion, which comprises a two-phase circulating anaerobic digestion system mainly comprising sequentially connected acid-producing phase reactors, methane-producing phase reactors, solid-liquid separation units, side-flow ammonia stripping units, gas treatment and recycling units and circulating pipelines; the present application directly combines the side-flow ammonia stripping unit with the acid-producing phase reactor, realizes source control and resource utilization of ammonia nitrogen, rather than treating ammonia nitrogen in the methane-producing phase or effluent thereof, reuses hydrogen and carbon dioxide formed by desulfurization and partial decarburization of acid-producing phase biogas to synthesize hydrogen for the methane-producing phase, creates carbon-hydrogen circulation, cooperatively improves methane production and consumes by-product hydrogen, returns effluent of the methane-producing phase to the acid-producing phase, builds internal circulation of alkalinity and bacterial flora in the system, and enhances the buffering capacity and stability of the system.