Device for rapidly responding to required ammonia amount changes in urea-hydrolysis ammonia preparation and implementation method of device

Abstract

The invention discloses a device for rapidly responding to required ammonia amount changes in urea-hydrolysis ammonia preparation and an implementation method of the device, and mainly aims to solve the problem of low response speed in urea-hydrolysis ammonia preparation in the prior art. The device comprises a hydrolyzer, an ammonia gas flow control valve, a urine flow control valve, a urine input pipe, an ammonia gas output pipe, a signal analysis display alarming controller, a first signal converter and a second signal converter, wherein one end of the urine input pipe and one end of the ammonia gas output pipe are both communicated with the hydrolyzer; a signal output end of the signal analysis display alarming controller is connected with a signal input end of the first signal converter and the signal input end of the second signal converter respectively by signal wires; the signal output end of the first signal converter is connected with the ammonia gas flow control valve; the signal output end of the second signal converter is connected with the urine flow control valve. According to the scheme, the device disclosed by the invention has the advantage of realizing the aim of randomly controlling the yield of ammonia gas according to the amount of required ammonia and achieving high response speed in the urea-hydrolysis ammonia preparation.

Description

technical field [0001] The invention relates to a urea hydrolysis response device, in particular to a device for quickly responding to changes in ammonia demand by urea hydrolysis and a method for realizing the same. Background technique [0002] The tail gas of coal-fired boilers in power plants contains NO, which will cause serious air pollution. X (mainly NO and NO 2 ) emissions, the country has issued strict standards to limit NO X emissions. To control NO in exhaust gas X The content of NO is usually reduced by selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR). X For removal, no matter which of the above two technologies is used, the reducing agent NH 3 . NH 3 The sources of NH mainly include liquid ammonia method, ammonia water method and urea method. Due to the simple preparation process, the liquid ammonia method was often used in the past. However, due to the high risk of liquid ammonia, the country gradually requires that the ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a fast response ammonia demand change device and its implementation method by urea hydrolysis ammonia production, mainly to solve the problem of slow response speed in urea hydrolysis ammonia production in the prior art

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