Hydrogen fluoride air-washer
Technical field
The utility model relates to a kind of air-washer, specifically, has related to and in a kind of industry, has manufactured the hydrogen fluoride air-washer that anhydrous hydrogen fluoride is used.
Background technology
In the production technique of current anhydrous hydrogen fluoride, in the furnace gas of just having made, except hydrogen fluoride, also contain plurality of impurities, as: water, sulfuric acid, SiF
4, H
2s, H
2, SO
2, SO
3, CO
2deng gas and other micro-residue.In the process of purifying at hydrogen fluoride, often need first furnace gas to be entered in washing tower and carries out countercurrent washing purification with washing acid, to remove moisture and the trace solid residue in furnace gas, then washed furnace gas is entered and in thick cold heat exchanger, remove sulfuric acid and moisture, then furnace gas enters condenser again and is further processed.In this process, thick cold heat exchanger need to be equipped with cooling system, and in prior art, conventional cooling system is ice maker, yet ice maker current consumption in actual production is too large, one ton of AHF of every product needs power consumption 800kW/h, and this has increased enterprise cost greatly, and is unfavorable for the realization of energy-saving and emission-reduction.
In order to solve the problem of above existence, people are seeking a kind of desirable technical solution always.
Summary of the invention
The purpose of this utility model is for the deficiencies in the prior art, thereby the hydrogen fluoride air-washer that a kind of design science, current consumption are low, reduce enterprise cost is provided.
To achieve these goals, the technical scheme that the utility model adopts is: a kind of hydrogen fluoride air-washer, comprise the thick cold heat exchanger of one-level and the thick cold heat exchanger of secondary and water cooling plant, the air outlet of the thick cold heat exchanger of described one-level is communicated with the inlet mouth of the thick cold heat exchanger of described secondary, described water cooling plant comprises cooling tower, inlet channel and water return pipeline, described inlet channel one end connects the water outlet of described cooling tower and the water-in that the other end connects the thick cold heat exchanger of described one-level and the thick cold heat exchanger of secondary, described water return pipeline one end connects the water-in of described cooling tower and the water outlet that the other end connects the thick cold heat exchanger of described one-level and the thick cold heat exchanger of secondary.
Based on above-mentioned, the thick cold heat exchanger of described one-level comprises at least two thick cold heat exchanger bodies of one-level, described in each, the air outlet of the thick cold heat exchanger body of one-level is all communicated with the inlet mouth of the thick cold heat exchanger of described secondary, described inlet channel comprises the water inlet main pipeline being connected with described cooling tower water outlet and at least three branch road water inlet pipes that are connected with the water-in of the thick cold heat exchanger body of described one-level and the water-in of the thick cold heat exchanger of described secondary respectively, described water return pipeline comprises the water inlet main pipeline being connected with described cooling tower water-in and at least three branch road water inlet pipes that are connected with the water-in of the thick cold heat exchanger body of described one-level and the water outlet of the thick cold heat exchanger of described secondary respectively.
Based on above-mentioned, described water cooling plant also comprises first-stage condenser, and the air outlet of the thick cold heat exchanger of described secondary connects the inlet mouth of described first-stage condenser.
Based on above-mentioned, the inlet mouth of the thick cold heat exchanger of described one-level connects the air outlet of washing tower by intake ducting, at the bottom of the thick cold heat exchanger of described one-level with at the bottom of the thick cold heat exchanger of described secondary, is connected respectively the liquid return hole of washing tower by back liquid pipeline.
The relative prior art of the utility model has substantive distinguishing features and progress, specifically, in prior art, one ton of AHF of every product needs power consumption 800kW/h, utilize now water cycle that described cooling tower provides to lowering the temperature in described thick cold heat exchanger, replaced the mode of utilizing ice maker to lower the temperature in prior art, produce one ton of AHF power consumption 400kW/h, be equivalent to half of original current consumption, by producing 1.5 ten thousand tons of AHF per year, calculate, every year can brownout 6,000,000 kW/h, greatly reduce current consumption, reduced enterprise cost.This hydrogen fluoride air-washer has advantages of that design science, current consumption are low, reduces enterprise cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure: 1. the thick cold heat exchanger of one-level; 2. the thick cold heat exchanger of secondary; 3. cooling tower; 4. inlet channel; 5. water return pipeline; 6. washing tower; 7. intake ducting; 8. back liquid pipeline; 9. first-stage condenser.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of hydrogen fluoride air-washer, comprise the thick cold heat exchanger 1 of one-level and the thick cold heat exchanger 2 of secondary and water cooling plant, the air outlet of the thick cold heat exchanger 1 of described one-level is communicated with the inlet mouth of the thick cold heat exchanger 2 of described secondary, described water cooling plant comprises cooling tower 3, inlet channel 4 and water return pipeline 5, described inlet channel 4 one end connect the water outlet of described cooling tower 3 and the water-in that the other end connects the thick cold heat exchanger 1 of described one-level and the thick cold heat exchanger 2 of secondary, described water return pipeline 5 one end connect the water-in of described cooling tower 3 and the water outlet that the other end connects the thick cold heat exchanger 1 of described one-level and the thick cold heat exchanger 2 of secondary.In prior art, one ton of AHF of every product needs power consumption 800kW/h, utilize now the water cycle that described cooling tower 3 provides to lower the temperature to the thick cold heat exchanger of two-stage inside, replaced the mode of utilizing ice maker to lower the temperature in prior art, produce only power consumption 400kW/h of one ton of AHF, be equivalent to half of original current consumption, by producing 1.5 ten thousand tons of AHF per year, calculate, every year can brownout 6,000,000 kW/h, greatly reduce current consumption, reduced enterprise cost.
The thick cold heat exchanger 1 of described one-level comprises at least two thick cold heat exchanger bodies of one-level, described in each, the air outlet of the thick cold heat exchanger body of one-level is all communicated with the inlet mouth of the thick cold heat exchanger 2 of described secondary, described inlet channel 4 comprises the water inlet main pipeline being connected with described cooling tower 3 water outlets and at least three branch road water inlet pipes that are connected with the water-in of the thick cold heat exchanger body of described one-level and the water-in of the thick cold heat exchanger 2 of described secondary respectively, described water return pipeline 5 comprises the water inlet main pipeline being connected with described cooling tower 3 water-ins and at least three branch road water inlet pipes that are connected with the water-in of the thick cold heat exchanger body of described one-level and the water outlet of the thick cold heat exchanger 2 of described secondary respectively.Thick cold heat exchanger is for removing sulfuric acid and the moisture in furnace gas, furnace gas enters respectively and in two thick cold heat exchanger bodies of described one-level, carries out slightly coldly from discharge at described washing tower 6 tops, and at least two thick cold heat exchanger bodies of described one-level side by side work are easier to remove most of sulfuric acid and the moisture in furnace gas; The thick cold heat exchanger 4 of described secondary is removed not removed small portion sulfuric acid and moisture in the thick cold heat exchanger 5 of described one-level again.And water cooling plant must provide Water-cooling circulating one to one to the cooperating of this multistage thick cold heat exchanger or a plurality of thick cold heat exchanger bodies.
Described water cooling plant also comprises first-stage condenser 9, and the air outlet of the thick cold heat exchanger 2 of described secondary connects the inlet mouth of described first-stage condenser 9, and described first-stage condenser 9 is carried out condensation by gas out from the thick cold heat exchanger 2 of described secondary.
The inlet mouth of the thick cold heat exchanger 1 of described one-level connects the air outlet of washing tower 6 by intake ducting 7,1 end of the thick cold heat exchanger of described one-level is connected respectively the liquid return hole of washing tower 6 with 2 ends of the thick cold heat exchanger of described secondary by back liquid pipeline 8.In the sulfuric acid and moisture being removed, still contain part furnace gas in each thick cold heat exchanger, need to again reclaim gas washing again, so sulfuric acid and moisture reenter in described washing tower 6 by described back liquid pipeline 8.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the field are to be understood that: still can modify or part technical characterictic is equal to replacement embodiment of the present utility model; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope that the utility model asks for protection.