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No-heat-exchange energy saving preparation device and method for preparing ammonia water from liquid ammonia directly

A technology for heat exchange, energy saving, and liquid ammonia, which is applied in chemical instruments and methods, mixing methods, transportation and packaging, etc. It can solve the problems of large statistical deviation of ammonia water flow, energy waste, ammonia water waste, etc., and achieve energy saving and reduction of energy consumption , the effect of improving efficiency

Active Publication Date: 2015-12-02
BEIJING BOHUITONG S & T DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing conventional ammonia water preparation device, the prepared ammonia water is used for other purposes and has a high concentration, which is not suitable for use in the SNCR system. If it is used directly, it will cause waste of ammonia water. If an ammonia water dilution device is installed later, the entire more complex system
At the same time, the concentration of ammonia water in the conventional ammonia water preparation system is unstable, resulting in large statistical deviations in subsequent ammonia water flow
Moreover, the conventional ammonia water preparation device releases a large amount of heat during the ammonia water preparation process, which poses a safety hazard and requires the use of a large amount of circulating cooling water for cooling, resulting in a large amount of energy waste

Method used

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  • No-heat-exchange energy saving preparation device and method for preparing ammonia water from liquid ammonia directly
  • No-heat-exchange energy saving preparation device and method for preparing ammonia water from liquid ammonia directly
  • No-heat-exchange energy saving preparation device and method for preparing ammonia water from liquid ammonia directly

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Embodiment 1

[0022] This embodiment is an energy-saving preparation device for directly producing ammonia from liquid ammonia without heat exchange, such as figure 1 shown. This embodiment includes: a cylindrical reaction tank 2, the bottom of the reaction tank is provided with a water inlet 6, the top of the reaction tank is provided with a dilute ammonia outlet 1, and the middle and upper part of the reaction tank is provided with multiple Liquid ammonia inlet 3, each of the liquid ammonia inlets is connected to its own coil 4, each of the coils is installed in a staggered manner, and extends to the middle and lower part of the reaction tank, and the coils are respectively connected to their respective distributors 5 connections.

[0023] The reaction tank can be cylindrical, that is, a body of revolution, or spherical or prismatic, similar to a vertical thick pipe with both ends closed. The cylindrical shape is a commonly used shape for chemical equipment, which is easy to process and...

Embodiment 2

[0032] This embodiment is an improvement of the first embodiment, and is a refinement of the first embodiment about the reaction tank. The lower part of the reaction tank described in this embodiment is provided with two blocking nets 201, 203, and packing 202 is filled between the two blocking nets, and the packing surrounds each of the distributors, as figure 2 shown.

[0033] The filler is kept in a fixed position of the reaction tank by the bottom barrier net and the upper barrier net, and the barrier net can prevent the filler from spreading and maintain it around the distributor. The bottom barrier net is about one-sixth of the distance from the bottom of the reaction tank, the upper barrier net is about two-fifths of the distance from the bottom of the reaction tank, and the distributor is about one-fourth of the distance from the bottom of the reaction tank. between layers of barrier netting.

Embodiment 3

[0035] The improvement of the above-mentioned embodiment of this embodiment is the refinement of the above-mentioned embodiment regarding the coil. The coiled pipe described in this embodiment is bent in a zigzag shape.

[0036] The coiled pipe shape of the present embodiment is a zigzag distribution, or is called a serpentine distribution, such as figure 1 Shown is the state of three coiled pipes aligned with each other. The shape of the coil can be determined according to the requirements of the cost of the coil, the ease of manufacture and the demand for space and gasification.

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Abstract

The invention relates to a no-heat-exchange energy saving preparation device and method for preparing ammonia water from liquid ammonia directly. The preparation device comprises a cylindrical reaction tank, a water inlet is arranged at the bottom of the reaction tank, a diluted ammonia water outlet is arranged at the top of the reaction tank, a plurality of liquid ammonia inlets are arranged in the upper and middle part of the reaction tank, each liquid ammonia inlet is connected with a respective coil pipe. The coil pipes are installed in a staggered manner, and extend towards the middle and lower part of the reaction tank. Each coil pipe is connected with a respective distributor. The coil pipes are heated by heat energy generated by diluted ammonia water during the dilution reaction process, thus liquid ammonia in the coil pipe expands and absorb heat, thus heat generated during the liquid ammonia dilution reaction is reduced, liquid ammonia expands before dilution, and the liquid ammonia dilution speed is raised. The device takes full advantage of waste heat generated during liquid ammonia dilution, the liquid ammonia dilution efficiency is raised, the situation that energy is employed to lower the temperature of the diluted ammonia water is avoided, energy consumption is lowered and a lot of energy is saved.

Description

technical field [0001] The invention relates to a device and method for directly producing ammonia from liquid ammonia without heat exchange and energy saving. Apparatus and methods for aqueous ammonia. Background technique [0002] Nitrogen oxides (NOx) are produced when fossil fuels and air are burned at high temperatures, and NOx is one of the largest sources of environmental pollution from power plants. As a technical equipment input for environmental protection of power plants, the denitrification process can reduce nitrogen compounds and directly reduce the pollution of nitrogen oxides to the environment. The existing SNCR (catalyst-free denitrification process) denitrification system uses ammonia water with a concentration of 5% as the denitrification reducing agent, which can play a very good environmental protection effect. The conventional ammonia water product is ammonia water with a concentration of 20%. Therefore, it is necessary to prepare 20% ammonia water ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B01F3/08B01F5/00B01F5/18B01F15/06B01F25/70
Inventor 孙书伟田国忠左琛刘莹孟立新
Owner BEIJING BOHUITONG S & T DEV
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