CN104014225A - Three-section absorbing process of acid absorbing tower - Google Patents
Three-section absorbing process of acid absorbing tower Download PDFInfo
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- CN104014225A CN104014225A CN201410270562.8A CN201410270562A CN104014225A CN 104014225 A CN104014225 A CN 104014225A CN 201410270562 A CN201410270562 A CN 201410270562A CN 104014225 A CN104014225 A CN 104014225A
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- absorbing
- water circulation
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- acid
- circulation pipe
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Abstract
The invention discloses a three-section absorbing process of an acid absorbing tower. The acid absorbing tower is sequentially composed of a first absorbing section, a second absorbing section and a third absorbing section from bottom to top, a first water circulating pipeline, a second water circulating pipeline and a third water circulating pipeline are correspondingly arranged outside the absorbing sections of the acid absorbing tower, and a cooling coil is arranged on a tower plate in each absorbing section and is communicated with the corresponding water circulating pipeline for performing three sections of water circulating heat exchange cooling. According to the three-section absorbing process of the acid absorbing tower, by adjusting the number of tower plates and improving a water circulating system, the acidic gas absorbing rate is improved when the effects of saving energy and reducing consumption are achieved, and high-concentration acid is efficiently prepared to meet the demand of modern industry.
Description
Technical field
The present invention relates to a kind of three sections of absorption techniques of sour absorption technique, particularly a kind of acid absorption column.
Background technology
Along with the fast development of modernization industry, all trades and professions have different demands to sour concentration, especially there is larger breach in high concentrated acid, as example, the situation of existing market introduced below to produce higher than existing bottleneck in the red fuming nitric acid (RFNA) technique of 68-70%.
At present, preparation of nitric acid technique exists some bottlenecks, makes rare concentration of nitric acid of preparation on the low side, can not meet the demand of modern industrialization.
(1) because the absorption reaction occurring in absorption tower is heat release, therefore good water circulation system need to be set in absorption tower, at present, what most nitric acid absorber adopted is to adopt outer loop water to add the cooling water of using from liquid ammonia evaporator to carry out two circulations, and the cooling water circulation that the evaporation of the liquefied ammonia on top, absorption tower adopts is single-cycle often, there is huge waste in this cold to recirculated water, can not make cooling water give full play to the effect of heat exchange, has a strong impact on NO in nitric acid absorber
xabsorption process, the raising of concentration of nitric acid is had a negative impact.
(2) in existing technique, the column plate number of plies of nitric acid absorber is on the low side, and inner space, absorption tower is little, causes not fully oxidation of part NO, makes NO
xcooling effect poor, affect the absorption efficiency on absorption tower, be also unfavorable for the raising of concentration of nitric acid.
Summary of the invention
The present invention is intended to for some bottlenecks that exist in prior art, and a kind of three sections of absorption techniques of acid absorption column are provided, and according to concrete operating mode demand, the number of plates is adjusted, and realizes the object that improves acid concentration.
The present invention is achieved through the following technical solutions.
A kind of three sections of absorption techniques of acid absorption column, described acid absorption column at the bottom of tower to tower top successively by the first absorber portion, the second absorber portion and the 3rd absorber portion form, outside the each absorber portion of acid absorption column, correspondence is provided with the first water circulation pipe, the second water circulation pipe and the 3rd water circulation pipe, column plate in each absorber portion is provided with cooling coil and is communicated with corresponding water circulation pipe, recirculated cooling water is by the flow through cooling coil of the each column plate of the first absorber portion of described the first water circulation pipe, process cooling water is flowed through after the each column plate of the 3rd absorber portion through described the 3rd water circulation pipe, enter described the second water circulation pipe, flow through after the each column plate of the second absorber portion, flow out acid absorption column.
Three sections of absorption techniques of this acid absorption column, can be for the absorption of nitric acid, especially be applied to the red fuming nitric acid (RFNA) of production concentration higher than 68-70%, can be by adopting the column plate type acid absorption column of built-in 40 layers of column plate to carry out the absorption concentrate of nitric acid, it is the first absorber portion that described column plate type acid absorption column is divided into 1-15 layer successively, 16-20 layer is the second absorber portion, 21-40 layer is the 3rd absorber portion, outside the each absorber portion of nitric acid absorber, correspondence is provided with the first water circulation pipe, the second water circulation pipe and the 3rd water circulation pipe, column plate in each absorber portion is provided with cooling coil and is communicated with corresponding water circulation pipe, concrete technological process is: recirculated cooling water is by the flow through cooling coil of 1-15 layer column plate of described the first water circulation pipe simultaneously, process cooling water is after described the 3rd water circulation pipe is flowed through the cooling coil of 21-40 layer column plate simultaneously, connect and enter the second water circulation pipe by pipeline, flow through after the cooling coil of 16-20 layer column plate simultaneously, flow out this nitric acid absorber.
The present invention, by adopting the utilization rate of the cooling raising cooling water of syllogic water circulation heat exchange, can effectively improve the concentration of acid in absorption tower.
Brief description of the drawings
Fig. 1 is the structural representation of the present embodiment.
Fig. 2 is absorbing tower plate structure schematic diagram.
In figure: 1. cooling coil, 2. the first water circulation pipe, 3. the second water circulation pipe, 4. the 3rd water circulation pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, the cooling column plate type acid absorption column of syllogic water circulation heat exchange adopting by producing 68-70% high concentration nitric acid, the present invention is described in detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not limited to the present invention.
As shown in the figure, a kind of column plate type nitric acid absorber of built-in 40 layers of column plate, 1-15 layer is the first absorber portion, 16-20 layer is the second absorber portion, 21-40 layer is the 3rd absorber portion, and at 1-15 layer, 16-20 layer, the outer correspondence of 21-40 layer absorber portion is provided with the first water circulation pipe, the second water circulation pipe and the 3rd water circulation pipe, column plate in each absorber portion is provided with cooling coil and is communicated with corresponding water circulation pipe, concrete technological process is: recirculated cooling water is by the flow through cooling coil of 1-15 layer column plate of described the first water circulation pipe simultaneously, process cooling water is after described the 3rd water circulation pipe is flowed through the cooling coil of 21-40 layer column plate simultaneously, connect and enter the second water circulation pipe by pipeline, flow through after the cooling coil of 16-20 layer column plate simultaneously, flow out this nitric acid absorber.
Claims (3)
1. three of an acid absorption column sections of absorption techniques, described acid absorption column at the bottom of tower to tower top successively by the first absorber portion, the second absorber portion and the 3rd absorber portion form, outside the each absorber portion of acid absorption column, correspondence is provided with the first water circulation pipe, the second water circulation pipe and the 3rd water circulation pipe, column plate in each absorber portion is provided with cooling coil and is communicated with corresponding water circulation pipe, it is characterized in that: recirculated cooling water is by the flow through cooling coil of the each column plate of the first absorber portion of described the first water circulation pipe, process cooling water is flowed through after the each column plate of the 3rd absorber portion through described the 3rd water circulation pipe, enter described the second water circulation pipe, flow through after the each column plate of the second absorber portion, flow out acid absorption column.
2. three sections of absorption techniques as claimed in claim 1, described technique is nitric acid absorption technique.
3. nitric acid absorption technique as claimed in claim 2, is characterized in that: the built-in 40 layers of column plate of described acid absorption column, are divided into three sections, 1-15 layer, 16-20 layer, 21-40 layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410270562.8A CN104014225A (en) | 2014-06-18 | 2014-06-18 | Three-section absorbing process of acid absorbing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410270562.8A CN104014225A (en) | 2014-06-18 | 2014-06-18 | Three-section absorbing process of acid absorbing tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104014225A true CN104014225A (en) | 2014-09-03 |
Family
ID=51431391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410270562.8A Pending CN104014225A (en) | 2014-06-18 | 2014-06-18 | Three-section absorbing process of acid absorbing tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104014225A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BG50432A1 (en) * | 1990-06-06 | 1992-08-14 | Vissh Khim T I | Column for oxidoabsorption of nitrogen oxides and production of nitric acid |
| CN202322382U (en) * | 2011-10-08 | 2012-07-11 | 中国成达工程有限公司 | Nitric acid absorption tower |
| CN202322383U (en) * | 2011-10-21 | 2012-07-11 | 天津华景化工新技术开发有限公司 | Absorption tower for producing nitric acid |
| CN102781551A (en) * | 2010-01-14 | 2012-11-14 | 阿尔斯通技术有限公司 | Water wash method and system for a carbon dioxide capture process |
-
2014
- 2014-06-18 CN CN201410270562.8A patent/CN104014225A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BG50432A1 (en) * | 1990-06-06 | 1992-08-14 | Vissh Khim T I | Column for oxidoabsorption of nitrogen oxides and production of nitric acid |
| CN102781551A (en) * | 2010-01-14 | 2012-11-14 | 阿尔斯通技术有限公司 | Water wash method and system for a carbon dioxide capture process |
| CN202322382U (en) * | 2011-10-08 | 2012-07-11 | 中国成达工程有限公司 | Nitric acid absorption tower |
| CN202322383U (en) * | 2011-10-21 | 2012-07-11 | 天津华景化工新技术开发有限公司 | Absorption tower for producing nitric acid |
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Application publication date: 20140903 |