A hot blast stove plate heat exchanger preheating system
A technology of plate heat exchangers and hot blast stoves, which is applied in furnaces, blast furnaces, heating furnaces, etc., can solve the problems of ineffective preheating of gas and combustion-supporting air, and low efficiency of hot blast stoves, so as to speed up combustion and improve heat transfer speed effect
Active Publication Date: 2021-08-06
上海雷林工业设备有限公司
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Problems solved by technology
[0004] In order to solve the problem that the coal gas and combustion-supporting air are not effectively preheated in the existing preheating system, resulting in low efficiency of the hot blast stove, the purpose of the present invention is to provide a preheating system for the plate heat exchanger of the hot blast stove
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[0029] Such as figure 1, a plate heat exchanger preheating system for a hot blast stove, comprising a first plate gas preheater 15, a first plate air preheater 16, a second plate gas preheater 17, a second plate air preheater 18, Hot blast stove 19, flue gas pipeline 20, additional combustion furnace 21, air input pipeline 22, air output pipeline 23, gas input pipeline 24, gas output pipeline 25, the exhaust gas end of hot blast stove 19 is connected to flue gas pipeline 20, and the flue gas The pipes 20 are respectively connected to the flue gas input ends of the first plate gas preheater 15 and the first plate air preheater 16 connected in parallel, and the flue gas output of the first plate gas preheater 15 and the first plate air preheater 16 Connect the flue gas input end of the second plate gas preheater 17 and the second plate air preheater 18 in parallel through the first outlet valve 26, the second plate gas preheater 17 and the second plate air preheater 18 The flue...
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Abstract
The invention discloses a plate heat exchanger preheating system for a hot blast stove, comprising a first plate gas preheater, a first plate air preheater, a second plate gas preheater, a second plate air preheater, a hot blast Furnace, additional combustion furnace, air input pipe, gas input pipe, the flue gas end of the hot blast stove is connected to the flue gas pipe, and the flue gas pipe is respectively connected to the flue gas of the first plate gas preheater and the first plate air preheater in parallel. The flue gas output end is connected to the flue gas input end of the parallel second plate gas preheater and the second plate air preheater through the first outlet valve, and the gas input pipe is connected to the first plate gas preheater. The input end is connected, the first plate type gas preheater is connected in series with the second plate type gas preheater, the air input pipe is connected with the input end of the first plate type air preheater, and the first plate type air preheater is connected in series with the second plate type air Preheater: The preheating system of the present invention ensures at least one preheating of gas and combustion air.
Description
technical field [0001] The invention relates to the technical field of blast furnace ironmaking in the metallurgical industry, in particular to a preheating system for a plate heat exchanger of a hot blast stove. Background technique [0002] An effective way to save energy and reduce consumption in the blast furnace ironmaking process is to increase the blast furnace inlet air temperature. For every 100°C increase in the blast furnace air temperature, the ton iron-coke ratio can be reduced by 20kg, the output can be increased by 4%, and the amount of coal injection can be increased by 50kg. Therefore, all enterprises attach great importance to keeping the wind temperature at a high level for smelting operations. In the prior art, the commonly used method is the hot blast stove. The hot blast stove is a device that provides hot air to the blast furnace. Its working principle is to generate high-temperature flue gas through the combustion of gas by the burner, and exchange he...
Claims
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IPC IPC(8): C21B9/14
CPCC21B9/14
Inventor 唐伟杰
Owner 上海雷林工业设备有限公司