CN105771553A - Low-concentration formaldehyde waste gas collecting and processing technique and special equipment - Google Patents
Low-concentration formaldehyde waste gas collecting and processing technique and special equipment Download PDFInfo
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- CN105771553A CN105771553A CN201610152676.1A CN201610152676A CN105771553A CN 105771553 A CN105771553 A CN 105771553A CN 201610152676 A CN201610152676 A CN 201610152676A CN 105771553 A CN105771553 A CN 105771553A
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- tower
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
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- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a low-concentration formaldehyde waste gas collecting and processing technique and special equipment. The special equipment comprises collecting towers, spray pipe assemblies and formaldehyde liquid circulating tanks. Each spray pipe assembly is arranged on the inner upper portion of each collecting tower; each formaldehyde liquid circulating tank is arranged at the bottom of each collecting tower; the spray pipe assembly and the corresponding formaldehyde liquid circulating tank form a spray circulating pipeline through a pipe and a spray circulating pump. The collecting towers include a first collecting tower, a second collecting tower and a third collecting tower. The spray pipe assemblies include a first spray pipe assembly, a second spray pipe assembly and a third spray pipe assembly. The formaldehyde liquid circulating tanks include a first formaldehyde liquid circulating tank, a second formaldehyde liquid circulating tank and a third formaldehyde liquid circulating tank. Based on the fact that formaldehyde is easy to dissolve into water, the technique of absorbing formaldehyde and then concentrating to recycle it is provided; after being processed by the technique, low-concentration formaldehyde waste gas can be discharged on standards.
Description
Technical field
The invention belongs to a kind of waste gas collecting system, particularly a kind of collection system collecting formaldehyde exhaust-gas.
Background technology
Formaldehyde is a kind of important Organic Chemicals, mainly for the production of phenolic resin (PP), Lauxite (UF) etc., also act as antibacterial, disinfectant, preservative, solvent, reducing agent and urea-formaldehyde type slow-release fertilizer etc., have in agricultural, water process, coating, medicine and dyestuff etc. and have been widely used.Formaldehyde reproducibility is the strongest in aldehydes, and chemical property is comparatively active, and the irritant abnormal smells from the patient of formaldehyde, exists harmful in the environment.Owing to inevitably producing the formaldehyde exhaust-gas of low concentration in the industrial production, process with traditional bioanalysis or burning method, operating cost is higher, and need to consume the energy of additional, but directly discharge can cause again atmospheric pollution, not only do not meet the requirement of environmental protection, and will also result in the waste of formaldehyde resource, it is therefore desirable to develop efficient, economic, energy-conservation formaldehyde exhaust-gas resource recovery process.
Summary of the invention
An object of the present invention is to solve the problems referred to above, the collection proposing a kind of low concentration formaldehyde waste gas processes the special equipment of technique, the collection of this low concentration formaldehyde waste gas processes the special equipment of technique and the low concentration formaldehyde gas in waste gas reclaims the formalin making high concentration, the formaldehyde response rate more than 97.5% while can also choose other chemical production technology and prepare hexamethylenamine, PMIDA or Lauxite industrial glue etc., thus reaching the comprehensive utilization of resource and the purpose of economy.
The two of the purpose of the present invention are to solve the problems referred to above, the collection proposing a kind of low concentration formaldehyde waste gas processes technique, formaldehyde is utilized to be highly soluble in the character of water, exploitation water outlet is the technique of concentration recovery again after absorbing, low concentration formaldehyde waste gas is by after this kind of PROCESS FOR TREATMENT, waste gas can realize qualified discharge, the formaldehyde concentrated solution of concentration up to standard can be obtained simultaneously, in industrial waste gas, the absorbance of formaldehyde may be up to more than absorbance, and qualified discharge and the resource that can realize low concentration formaldehyde waste gas are recycled simultaneously.
nullAn object of the present invention is achieved through the following technical solutions: the collection of low concentration formaldehyde waste gas processes the special equipment of technique，It is characterized in that: be provided with collection tower、Spray pipe component、Formaldehyde liquid circulating slot，Described collection tower is all provided with spray pipe component at tower internal upper part，Described collection tower is all provided with formaldehyde liquid circulating slot in bottom，Described spray pipe component is by pipeline and Sprayer Circulation pump and formaldehyde liquid circulating slot composition Sprayer Circulation pipeline，Described collection tower is divided into the first collection tower、Second collects tower、3rd collects tower，Described spray pipe component is divided into the first spray pipe component、Second spray pipe component、3rd spray pipe component，Described formaldehyde liquid circulating slot is divided into the first formaldehyde liquid circulating slot、Second formaldehyde liquid circulating slot、Trioxin liquid circulation groove，Described Sprayer Circulation pipeline is the first Sprayer Circulation pipeline、Second Sprayer Circulation pipeline、3rd Sprayer Circulation pipeline，Described first collects tower passes through pipeline in bottom、Aerator is connected with the air intake duct containing formaldehyde exhaust-gas，Described first collects tower is connected by pipeline and the second bottom collecting tower at top place，Described second collects tower is connected by pipeline and the 3rd bottom collecting tower at top，Described 3rd collects tower is connected with the bottom of activated carbon tourie by pipeline and valve at top place，Described 3rd Sprayer Circulation pipeline passes through pipeline、Valve and the second formaldehyde liquid circulating slot，Described second Sprayer Circulation pipeline passes through pipeline、Valve and the first formaldehyde liquid circulating slot，Described first Sprayer Circulation pipeline passes through pipeline、Valve is connected with formaldehyde storagetank，Described formaldehyde storagetank is provided with gas discharge pipe up，Described gas discharge pipe and first is collected tower and is connected in bottom，Described formaldehyde storagetank is provided with Drainage pipe in side.
The two of the purpose of the present invention are achieved through the following technical solutions: the collection of low concentration formaldehyde waste gas processes technique, it is characterized in that: include following step: (1) low concentration formaldehyde waste gas after removing glue dedusting enters the bottom of the first collection tower, and tower top carries out spray-absorption from the circulation fluid after the second absorption liquid collecting tower and self cooling；Absorb liquid from top to bottom at the bottom of tower, a circulation fluid part squeezes into formaldehyde measuring tank as product, a part is self-loopa absorption more after cooling, formaldehyde gas phase is from bottom to top, tower top effusion is collected from first, enter back into the bottom of the second collection tower, continue to absorb from bottom to top, the circulation fluid after liquid cools down with self that absorbs that circulation fluid is the 3rd tower carries out spray-absorption, last effusion from the second collection tower top counts the 3rd collection tower bottom, second collects tower absorbs the first collection tower absorption of liquid part feeding, and a part squeezes into tower top spray-absorption after cooling；(2) gas from second collect column overhead discharge count the 3rd collection tower bottom continue absorb from bottom to top, the circulation fluid that circulation fluid is after the industry water of spray washing and self cooling carries out spray-absorption, eventually pass the washing of supplementary water spray, after demister, the chimney being entered into activated carbon tourie by the 3rd collection tower is discharged to air, when by chimney, through installing the detection of the CEMS on chimney；(3) first collect tower absorbs liquid part feeding the second collection tower, keeps a tower liquid level equilibrium.
The present invention is provided with the first collection tower, the second collection tower, the 3rd collection tower, utilize the characteristic of the as easy as rolling off a log water of formaldehyde, by Water Sproading formaldehyde, three grades of gradients of gas-liquid overflow manner are adopted to reclaim, every grade of mode utilizing circulation, circulation fluid concentration being brought up to prescribed concentration and to carry out corresponding products-supply technique be that follow-up chemical industry by-product is prepared, making the concentration of formaldehyde in discharge waste gas is 50 100mg/m3。
The characteristic of the as easy as rolling off a log water of this technology utilization formaldehyde, by the technique of Water Sproading formaldehyde, adopts three grades of gradients of gas-liquid overflow manner to reclaim, and every grade of mode adopting circulation brings up to appointment circulation fluid concentration and reclaims concentration about 35.5%.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated:
nullEmbodiment: referring to accompanying drawing 1，The collection of low concentration formaldehyde waste gas processes the special equipment of technique，It is provided with collection tower、Spray pipe component、Formaldehyde liquid circulating slot，Described collection tower is all provided with spray pipe component at tower internal upper part，Described collection tower is all provided with formaldehyde liquid circulating slot in bottom，Described spray pipe component is by pipeline and Sprayer Circulation pump and formaldehyde liquid circulating slot composition Sprayer Circulation pipeline，Described collection tower is divided into the first collection tower 1、Second collects tower 2、3rd collects tower 3，Described spray pipe component is divided into the first spray pipe component 4、Second spray pipe component 5、3rd spray pipe component 6，Described formaldehyde liquid circulating slot is divided into the first formaldehyde liquid circulating slot 7、Second formaldehyde liquid circulating slot 8、Trioxin liquid circulation groove 9，Described Sprayer Circulation pipeline is the first Sprayer Circulation pipeline 10、Second Sprayer Circulation pipeline 11、3rd Sprayer Circulation pipeline 12，Described first collects tower passes through pipeline in bottom、Aerator 17 is connected with the air intake duct containing formaldehyde exhaust-gas，Described first collects tower is connected by pipeline and the second bottom collecting tower at top place，Described second collects tower is connected by pipeline and the 3rd bottom collecting tower at top，Described 3rd collects tower is connected with the bottom of activated carbon tourie 13 by pipeline and valve at top place，Described 3rd Sprayer Circulation pipeline passes through pipeline、Valve and the second formaldehyde liquid circulating slot，Described second Sprayer Circulation pipeline passes through pipeline、Valve and the first formaldehyde liquid circulating slot，Described first Sprayer Circulation pipeline passes through pipeline、Valve is connected with formaldehyde storagetank 14，Described formaldehyde storagetank is provided with gas discharge pipe 15 up，Described gas discharge pipe and first is collected tower and is connected in bottom，Described formaldehyde storagetank is provided with Drainage pipe 16 in side.
The collection of low concentration formaldehyde waste gas processes technique, including following step: (1) low concentration formaldehyde waste gas after removing glue dedusting enters the bottom of the first collection tower, and tower top carries out spray-absorption from the circulation fluid after the second absorption liquid collecting tower and self cooling；Absorb liquid from top to bottom at the bottom of tower, a circulation fluid part squeezes into formaldehyde measuring tank as product, a part is self-loopa absorption more after cooling, formaldehyde gas phase is from bottom to top, tower top effusion is collected from first, enter back into the bottom of the second collection tower, continue to absorb from bottom to top, the circulation fluid after liquid cools down with self that absorbs that circulation fluid is the 3rd tower carries out spray-absorption, last effusion from the second collection tower top counts the 3rd collection tower bottom, second collects tower absorbs the first collection tower absorption of liquid part feeding, and a part squeezes into tower top spray-absorption after cooling；(2) gas from second collect column overhead discharge count the 3rd collection tower bottom continue absorb from bottom to top, the circulation fluid that circulation fluid is after the industry water of spray washing and self cooling carries out spray-absorption, eventually pass the washing of supplementary water spray, after demister, the chimney being entered into activated carbon tourie by the 3rd collection tower is discharged to air, when by chimney, through installing the detection of the CEMS on chimney；(3) first collect tower absorbs liquid part feeding the second collection tower, keeps a tower liquid level equilibrium.
Last it is noted that obvious, above-described embodiment is only for clearly demonstrating example of the present invention, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the apparent change thus extended out or variation are still among protection scope of the present invention.
Claims (2)
- null1. the collection of a low concentration formaldehyde waste gas processes the special equipment of technique，It is characterized in that: be provided with collection tower、Spray pipe component、Formaldehyde liquid circulating slot，Described collection tower is all provided with spray pipe component at tower internal upper part，Described collection tower is all provided with formaldehyde liquid circulating slot in bottom，Described spray pipe component is by pipeline and Sprayer Circulation pump and formaldehyde liquid circulating slot composition Sprayer Circulation pipeline，Described collection tower is divided into the first collection tower (1)、Second collects tower (2)、3rd collects tower (3)，Described spray pipe component is divided into the first spray pipe component (4)、Second spray pipe component (5)、3rd spray pipe component (6)，Described formaldehyde liquid circulating slot is divided into the first formaldehyde liquid circulating slot (7)、Second formaldehyde liquid circulating slot (8)、Trioxin liquid circulation groove (9)，Described Sprayer Circulation pipeline is the first Sprayer Circulation pipeline (10)、Second Sprayer Circulation pipeline (11)、3rd Sprayer Circulation pipeline (12)，Described first collects tower passes through pipeline in bottom、Aerator (17) is connected with the air intake duct containing formaldehyde exhaust-gas，Described first collects tower is connected by pipeline and the second bottom collecting tower at top place，Described second collects tower is connected by pipeline and the 3rd bottom collecting tower at top，Described 3rd collects tower is connected with the bottom of activated carbon tourie (13) by pipeline and valve at top place，Described 3rd Sprayer Circulation pipeline passes through pipeline、Valve and the second formaldehyde liquid circulating slot，Described second Sprayer Circulation pipeline passes through pipeline、Valve and the first formaldehyde liquid circulating slot，Described first Sprayer Circulation pipeline passes through pipeline、Valve is connected with formaldehyde storagetank (14)，Described formaldehyde storagetank is provided with gas discharge pipe (15) up，Described gas discharge pipe and first is collected tower and is connected in bottom，Described formaldehyde storagetank is provided with Drainage pipe (16) in side.
- 2. the collection of a low concentration formaldehyde waste gas processes technique, it is characterized in that: include following step: (1) low concentration formaldehyde waste gas after removing glue dedusting enters the bottom of the first collection tower, and tower top carries out spray-absorption from the circulation fluid after the second absorption liquid collecting tower and self cooling；Absorb liquid from top to bottom at the bottom of tower, a circulation fluid part squeezes into formaldehyde measuring tank as product, a part is self-loopa absorption more after cooling, formaldehyde gas phase is from bottom to top, tower top effusion is collected from first, enter back into the bottom of the second collection tower, continue to absorb from bottom to top, the circulation fluid after liquid cools down with self that absorbs that circulation fluid is the 3rd tower carries out spray-absorption, last effusion from the second collection tower top counts the 3rd collection tower bottom, second collects tower absorbs the first collection tower absorption of liquid part feeding, and a part squeezes into tower top spray-absorption after cooling；(2) gas from second collect column overhead discharge count the 3rd collection tower bottom continue absorb from bottom to top, the circulation fluid that circulation fluid is after the industry water of spray washing and self cooling carries out spray-absorption, eventually pass the washing of supplementary water spray, after demister, the chimney being entered into activated carbon tourie by the 3rd collection tower is discharged to air, when by chimney, through installing the detection of the CEMS on chimney；(3) first collect tower absorbs liquid part feeding the second collection tower, keeps a tower liquid level equilibrium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152676.1A CN105771553A (en) | 2016-03-17 | 2016-03-17 | Low-concentration formaldehyde waste gas collecting and processing technique and special equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610152676.1A CN105771553A (en) | 2016-03-17 | 2016-03-17 | Low-concentration formaldehyde waste gas collecting and processing technique and special equipment |
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| Publication Number | Publication Date |
|---|---|
| CN105771553A true CN105771553A (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610152676.1A Pending CN105771553A (en) | 2016-03-17 | 2016-03-17 | Low-concentration formaldehyde waste gas collecting and processing technique and special equipment |
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| CN (1) | CN105771553A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107670465A (en) * | 2017-09-29 | 2018-02-09 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN107694288A (en) * | 2017-09-29 | 2018-02-16 | 北京石油化工学院 | A kind of handling process of water-insoluble VOCs waste gas |
| CN107774097A (en) * | 2017-09-29 | 2018-03-09 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN107803098A (en) * | 2017-09-29 | 2018-03-16 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN107824009A (en) * | 2017-09-29 | 2018-03-23 | 北京石油化工学院 | A kind of processing recovery process of water-insoluble VOCs waste gas |
| CN114288839A (en) * | 2021-12-24 | 2022-04-08 | 莱芜市兆信新材料股份有限公司 | Naphthalene water reducer sulfonation condensation tail gas recovery process |
-
2016
- 2016-03-17 CN CN201610152676.1A patent/CN105771553A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107670465A (en) * | 2017-09-29 | 2018-02-09 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN107694288A (en) * | 2017-09-29 | 2018-02-16 | 北京石油化工学院 | A kind of handling process of water-insoluble VOCs waste gas |
| CN107774097A (en) * | 2017-09-29 | 2018-03-09 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN107803098A (en) * | 2017-09-29 | 2018-03-16 | 北京石油化工学院 | A kind of handling process of VOCs waste gas |
| CN107824009A (en) * | 2017-09-29 | 2018-03-23 | 北京石油化工学院 | A kind of processing recovery process of water-insoluble VOCs waste gas |
| CN114288839A (en) * | 2021-12-24 | 2022-04-08 | 莱芜市兆信新材料股份有限公司 | Naphthalene water reducer sulfonation condensation tail gas recovery process |
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Application publication date: 20160720 |