CN218871268U

CN218871268U - Preparation system of agricultural ammonium chloride and industrial soda ash

Info

Publication number: CN218871268U
Application number: CN202222190916.0U
Authority: CN
Inventors: 汪武平; 张光瑞; 马海龙; 蒋海金; 李猛
Original assignee: Shaanxi Yuneng Chemical Material Co ltd
Current assignee: Shaanxi Yuneng Chemical Material Co ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2023-04-18
Anticipated expiration: 2032-08-19

Abstract

The utility model discloses a preparation system of agricultural ammonium chloride and industrial soda. A preparation system of agricultural ammonium chloride and industrial soda ash comprises: high-pressure RO2 dense water pitcher, ammonia reactor, carbon dioxide reactor, solid-liquid separation ware, ammonium chloride evaporimeter, finished product packing area and sodium bicarbonate crystallizer, high-pressure RO2 dense water pitcher with the ammonia reactor is connected, the ammonia reactor with the carbon dioxide reactor is connected, the carbon dioxide reactor with solid-liquid separation ware is connected, solid-liquid separation ware with the ammonium chloride evaporimeter with the sodium bicarbonate crystallizer is connected, the ammonium chloride solid that the ammonium chloride evaporimeter discharged out with the sodium carbonate solid that the sodium bicarbonate crystallizer discharged out is in pack in the finished product packing area. The utility model provides a preparation system of agricultural ammonium chloride and industrial soda can reduce the carbon emission, is favorable to the environmental protection.

Description

Preparation system of agricultural ammonium chloride and industrial soda ash

Technical Field

The utility model relates to a strong brine system agricultural ammonium chloride and industrial soda technical field especially relate to a preparation system of agricultural ammonium chloride and industrial soda.

Background

The concentrated brine of the water treatment center of the coal chemical industry enterprise is concentrated and separated again through high-pressure reverse osmosis RO2 by a membrane concentration nanofiltration separator, and the two-stage nanofiltration concentrated water is prepared into sodium sulfate by adopting a freezing crystallization and hot melting evaporation crystallization method. Dissolving the sodium sulfate decahydrate obtained by freezing crystallization, conveying the dissolved sodium sulfate decahydrate to a nitrate refining device, and treating the sodium sulfate decahydrate by the nitrate refining device to obtain anhydrous sodium sulfate with better quality. The high-pressure reverse osmosis RO2 concentrated water produced water is mainly sodium chloride, the produced water enters a triple-effect forced evaporative crystallization system to be evaporated and crystallized to obtain pure sodium chloride solid, and in order to ensure the purity of the sodium chloride solid, a certain amount of mother liquor is discharged from the evaporative crystallization system to remove impurity salt and drying system.

At present, a coal chemical industry enterprise generally uses a mechanical vapor compression (MVR) process, a multiple effect evaporation (MED) process, a multiple effect flash evaporation (MSF) process, and a Membrane Distillation (MD) process, and the above listed salt separation crystallization processes have respective advantages and disadvantages, but when applied to the field of coal chemical industry, carbon dioxide gas needs to be additionally introduced for reaction, so that the carbon emission is high and not beneficial to environmental protection.

Therefore, it is necessary to provide a system for preparing agricultural ammonium chloride and industrial soda ash to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

To the above situation, for overcoming the prior art defect, the utility model provides a preparation system of agricultural ammonium chloride and industrial soda can reduce the carbon emission, is favorable to the environmental protection.

In order to achieve the above object, the utility model adopts the following technical scheme:

preparation system of agricultural ammonium chloride and industrial soda ash includes: the system comprises a high-pressure RO2 concentrated water tank, an ammonia reactor, a carbon dioxide reactor, a solid-liquid separator, an ammonium chloride evaporator, a finished product packaging area and a sodium bicarbonate crystallizer, wherein the high-pressure RO2 concentrated water tank is connected with the ammonia reactor, the ammonia reactor is connected with the carbon dioxide reactor, the carbon dioxide reactor is connected with the solid-liquid separator, the solid-liquid separator is connected with the ammonium chloride evaporator and the sodium bicarbonate crystallizer, ammonium chloride solids discharged by the ammonium chloride evaporator and sodium carbonate solids discharged by the sodium bicarbonate crystallizer are packaged in the finished product packaging area, the sodium bicarbonate crystallizer is connected with a carbon dioxide separator, the carbon dioxide separator is connected with the carbon dioxide reactor, the carbon dioxide separator is used for separating carbon dioxide in the sodium bicarbonate crystallizer, the carbon dioxide reactor is also connected with a carbon dioxide recoverer, and the carbon dioxide recoverer is used for recovering excessive carbon dioxide in the carbon dioxide reactor and conveying the excessive carbon dioxide into the carbon dioxide reactor again for reuse.

Preferably, the top of the ammonia reactor is connected with an ammonia recoverer, and excessive ammonia gas in the ammonia reactor can be remitted to the front end by the ammonia recoverer for reuse, so that the utilization rate of the ammonia gas is improved.

Preferably, the preparation system of the agricultural ammonium chloride and the industrial soda further comprises a condensate collecting water tank, condensate is generated in the operation process of the solid-liquid separator, the ammonium chloride evaporator, the sodium bicarbonate crystallizer and the carbon dioxide separator, and the generated condensate is uniformly conveyed into the condensate collecting water tank to be used as make-up water of circulating water.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) The utility model discloses to the peculiar quality of water of strong brine, ammonia and carbon dioxide in the abundant useless synthetic gas of utilizing realize recycling of carbon dioxide waste gas, ammonia waste gas, greatly reduced the carbon emission, be favorable to realizing "zero release" of carbon, be favorable to the environmental protection.

Drawings

Fig. 1 is a schematic structural diagram of a preparation system for agricultural ammonium chloride and industrial soda ash provided by the present invention.

Wherein, the names corresponding to the reference numbers are: the method comprises the following steps of 1-high-pressure RO2 concentrated water tank, 2-ammonia reactor, 21-ammonia recoverer, 3-carbon dioxide reactor, 31-carbon dioxide recoverer, 4-solid-liquid separator, 5-ammonium chloride evaporator, 6-finished product packaging area, 7-sodium bicarbonate crystallizer, 8-carbon dioxide separator and 9-condensate collecting water tank.

Detailed Description

The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.

Example 1

As shown in fig. 1, the system for preparing agricultural ammonium chloride and industrial soda ash provided by the present invention comprises: the high-pressure RO2 concentrated water tank 1, the ammonia reactor 2, the carbon dioxide reactor 3, the solid-liquid separator 4, the ammonium chloride evaporator 5, the finished product packaging area 6 and the sodium bicarbonate crystallizer 7, the high-pressure RO2 concentrated water tank 1 is connected with the ammonia reactor 2, the ammonia reactor 2 is connected with the carbon dioxide reactor 3, the carbon dioxide reactor 3 is connected with the solid-liquid separator 4, the solid-liquid separator 4 is connected with the ammonium chloride evaporator 5 and the sodium bicarbonate crystallizer 7, the ammonium chloride solid discharged from the ammonium chloride evaporator 5 and the sodium carbonate solid discharged from the sodium bicarbonate crystallizer 7 are packaged in the finished product packaging area 6, the concentrated water in the high-pressure RO2 concentrated water tank 1 mainly contains sodium chloride and is conveyed into the ammonia reactor 2 through a pump, sufficient ammonia gas is introduced into the bottom of the ammonia reactor 2, so that the ammonia reactor 2 is a saturated sodium chloride ammonia solution, the saturated sodium chloride ammonia solution enters the carbon dioxide reactor 3, at the moment, excessive carbon dioxide is introduced into the carbon dioxide reactor 3 (the Hou's soda process principle), the carbon dioxide reactor 3 is generated, the carbon dioxide slurry is separated in the carbon dioxide reactor 3, the concentrated sodium bicarbonate slurry is conveyed into the solid-liquid separator 4, the solid sodium bicarbonate evaporator 4 is conveyed into the solid-liquid packaged in the solid-liquid packaging area 6, the sodium bicarbonate crystallizer 7, the solid-liquid is separated from the solid-liquid in the solid-liquid of the sodium bicarbonate crystallizer 4, the sodium bicarbonate crystallizer 4, the solid-liquid is conveyed into the solid-liquid of the solid-liquid packaging area, the solid sodium bicarbonate crystallizer 4, the solid-liquid of the solid sodium bicarbonate crystallizer 4, the sodium bicarbonate crystallizer 7 is connected with a carbon dioxide separator 8, the carbon dioxide separator 8 is connected with the carbon dioxide reactor 3, the carbon dioxide separator 8 separates carbon dioxide in the sodium bicarbonate crystallizer 7 (the carbon dioxide is generated when sodium bicarbonate in the sodium bicarbonate crystallizer 7 generates sodium carbonate solid), the separated carbon dioxide is conveyed into the carbon dioxide reactor 3 for recycling, the carbon dioxide reactor 3 is also connected with a carbon dioxide recoverer 31, and the carbon dioxide recoverer 31 recovers excess carbon dioxide in the carbon dioxide reactor 3 and conveys the excess carbon dioxide to the carbon dioxide reactor 3 again for reuse, so that excessive carbon dioxide does not need to be additionally input, the input amount of carbon dioxide is reduced, the excess carbon dioxide and the carbon dioxide in the sodium bicarbonate crystallizer 7 are recycled, the carbon emission is reduced, and the standard of zero carbon emission is facilitated.

A small amount of mixed salt can be generated in the ammonium chloride evaporator 5, the content of sodium chloride in the high-pressure reverse osmosis RO2 concentrated water is unsaturated solution, and part of the mixed salt needs to be supplemented to prepare supersaturated sodium chloride solution, so that the small amount of mixed salt generated in the ammonium chloride evaporator 5 can be conveyed to the high-pressure RO2 concentrated water tank 1 to prepare supersaturated sodium chloride solution.

Example 2

As shown in fig. 1, the top of the ammonia reactor 2 is connected with an ammonia recoverer 21, and the excess ammonia gas in the ammonia reactor 2 can be remitted to the front end by the ammonia recoverer 21 for reuse, so that the utilization rate of the ammonia gas is improved.

Example 3

As shown in fig. 1, the system for preparing agricultural ammonium chloride and industrial soda further comprises a condensate collecting water tank 9, wherein condensate is generated in the operation process of the solid-liquid separator 4, the ammonium chloride evaporator 5, the sodium bicarbonate crystallizer 7 and the carbon dioxide separator 8, and the generated condensate is uniformly delivered to the condensate collecting water tank 9 to be used as make-up water of circulating water.

The present application utilizes CO in syngas ₂ The proportion can reach 10% -12%, and the carbon emission can exceed the standard after conversion, purification and separation and final discharge. The content of recovered carbon dioxide by removing sulfur from the ammonia-containing non-condensable gas generated by conversion is 624.72kg/h, the content of ammonia is 18.22kg/h, the content of hydrogen sulfide is 15.67kg/h, and the content of ammonia gas in the ammonia-containing high-temperature condensate generated by conversion is about 2.86kg/h.

When in use, high-pressure reverse osmosis RO2 concentrated water is pumped into the ammonia reactor 2, and sufficient ammonia gas is introduced into the bottom of the ammonia reactor 2; introducing an ammonia reactor 2, pumping mother liquor into a next reaction unit carbon dioxide reactor 3 through a pump, discharging sodium bicarbonate thick slurry into a solid-liquid separator 4 at the bottom of the carbon dioxide reactor 3, separating sodium bicarbonate crystals out of the solid-liquid separator 4, simultaneously generating ammonium chloride thick slurry, separating the sodium bicarbonate crystals out of relatively pure sodium bicarbonate through a sodium bicarbonate crystallizer 7, calcining to obtain relatively pure industrial sodium carbonate, and simultaneously recycling CO ₂ The concentrated ammonium chloride slurry is conveyed to an ammonium chloride evaporator and dewatered by the ammonium chloride evaporator to separate out relatively pure ammonium chloride.

The high-pressure reverse osmosis RO2 concentrated water mainly contains sodium chloride (the content is 10.5%), the content cannot reach the saturation degree (the content of the sodium chloride at 25 ℃ under normal pressure is 26.4% and is saturated sodium chloride), the sodium chloride needs to be added for obtaining the saturated sodium chloride, the concentration of the sodium chloride in the mixed salt feeding material of the device is 20.4%, the sodium chloride in the mixed salt can be fully utilized, and the discharge amount of the mixed salt can be reduced.

Part of ammonia in the system is derived from waste ammonia and waste ammonia water generated by purification; the method realizes the reutilization of gasified carbon dioxide waste gas and purified ammonia waste gas, breaks through the traditional salt separation crystallization, creates a new salt separation process route, and opens up a new way for zero emission salt separation crystallization of coal chemical enterprises.

The above embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the protection scope of the present invention, but all the insubstantial changes or modifications made in the spirit and the idea of the main design of the present invention, the technical problems solved by the embodiment are still consistent with the present invention, and all should be included in the protection scope of the present invention.

Claims

1. A preparation system of agricultural ammonium chloride and industrial soda ash is characterized by comprising the following components:

high-pressure RO2 dense water jar (1), ammonia reactor (2), carbon dioxide reactor (3), solid-liquid separator (4), ammonium chloride evaporimeter (5), finished product packing area (6) and sodium bicarbonate crystallizer (7), high-pressure RO2 dense water jar (1) with ammonia reactor (2) are connected, ammonia reactor (2) with carbon dioxide reactor (3) are connected, carbon dioxide reactor (3) with solid-liquid separator (4) are connected, solid-liquid separator (4) with ammonium chloride evaporimeter (5) with sodium bicarbonate crystallizer (7) are connected, the ammonium chloride solid that ammonium chloride evaporimeter (5) discharged out with the sodium carbonate solid that sodium bicarbonate crystallizer (7) discharged out packs in finished product packing area (6), sodium bicarbonate crystallizer (7) are connected with carbon dioxide separator (8), carbon dioxide separator (8) with carbon dioxide reactor (3) are connected, carbon dioxide separator (8) in to sodium bicarbonate crystallizer (7) are separated.

2. The system for preparing agricultural ammonium chloride and industrial soda as claimed in claim 1, wherein the carbon dioxide reactor (3) is further connected with a carbon dioxide recoverer (31).

3. The system for preparing agricultural ammonium chloride and industrial soda as claimed in claim 1, wherein an ammonia recoverer (21) is connected to the top of the ammonia reactor (2).

4. The system for preparing agricultural ammonium chloride and industrial soda as claimed in claim 1, further comprising a condensate collection water tank (9).