JPH01298016A - Method for removing ammonia in coke oven gas by absorbing and production of ammonium sulfate or liquid ammonia - Google Patents
Method for removing ammonia in coke oven gas by absorbing and production of ammonium sulfate or liquid ammoniaInfo
- Publication number
- JPH01298016A JPH01298016A JP63127349A JP12734988A JPH01298016A JP H01298016 A JPH01298016 A JP H01298016A JP 63127349 A JP63127349 A JP 63127349A JP 12734988 A JP12734988 A JP 12734988A JP H01298016 A JPH01298016 A JP H01298016A
- Authority
- JP
- Japan
- Prior art keywords
- ammonia
- liquid
- ammonium sulfate
- coke oven
- oven gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 159
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 68
- 239000000571 coke Substances 0.000 title claims abstract description 38
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 229910052921 ammonium sulfate Inorganic materials 0.000 title claims abstract description 33
- 235000011130 ammonium sulphate Nutrition 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims description 28
- 238000004519 manufacturing process Methods 0.000 title claims description 16
- 238000010521 absorption reaction Methods 0.000 claims abstract description 53
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000002253 acid Substances 0.000 claims abstract description 25
- 238000005507 spraying Methods 0.000 claims abstract description 3
- 239000007788 liquid Substances 0.000 claims description 43
- 238000004140 cleaning Methods 0.000 claims description 27
- 239000007864 aqueous solution Substances 0.000 claims description 24
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical group [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims description 7
- 239000006096 absorbing agent Substances 0.000 abstract description 7
- 238000005406 washing Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 239000004254 Ammonium phosphate Substances 0.000 abstract 2
- 229910000148 ammonium phosphate Inorganic materials 0.000 abstract 2
- 235000019289 ammonium phosphates Nutrition 0.000 abstract 2
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 33
- 239000000243 solution Substances 0.000 description 9
- 230000002378 acidificating effect Effects 0.000 description 5
- 229910019142 PO4 Inorganic materials 0.000 description 4
- 239000010452 phosphate Substances 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000004712 monophosphates Chemical class 0.000 description 1
- 239000012452 mother liquor Substances 0.000 description 1
- 229910017464 nitrogen compound Inorganic materials 0.000 description 1
- 150000002830 nitrogen compounds Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/24—Sulfates of ammonium
- C01C1/242—Preparation from ammonia and sulfuric acid or sulfur trioxide
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/12—Separation of ammonia from gases and vapours
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、コークス炉ガス中のアンモニアを吸収装置と
洗浄液を用いて吸収除去する方法およびこのようにして
得られたコークス炉ガス中のアンモニアを吸収した吸収
液から硫安または液体アンモニアを製造する方法に関す
る。[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a method for absorbing and removing ammonia in coke oven gas using an absorption device and a cleaning liquid, and a method for absorbing and removing ammonia in coke oven gas obtained in this way. The present invention relates to a method for producing ammonium sulfate or liquid ammonia from an absorbent liquid that has absorbed ammonium sulfate or liquid ammonia.
〈従来の技術〉
コークス炉ガスに含有されるアンモニアは硫安または液
体アンモニアとして回収するかアンモニアの燃焼分解に
より除去されていた。 −般に、コークス炉ガス中のア
ンモニアを回収または除去する方法において、コークス
炉ガスは吸収装置に導入され、洗浄液を用いてアンモニ
アを吸収除去される。<Prior Art> Ammonia contained in coke oven gas has been recovered as ammonium sulfate or liquid ammonia, or removed by combustion decomposition of ammonia. - Generally, in a method for recovering or removing ammonia in coke oven gas, coke oven gas is introduced into an absorption device, and ammonia is absorbed and removed using a cleaning liquid.
以下に従来の代表例を挙げる。Typical conventional examples are listed below.
■硫安として回収する方法におけるアンモニアの吸収方
法の例
イ、特開昭５９−２０３７２５ （第４図参照）
吸収装置ニスプレ一方式 １段
洗浄液 ：稀硫酸水溶液
口、特開昭６０−２６４３２２ （第６図参照）
吸収装置ニスプレ一方式 ２段
洗浄液 ：稀硫酸水溶液
ハ、特開昭６１−１９２７９４ （第５図参照）
吸収装置：充填塔型式
洗浄液 ：弱酸性の硫安水溶液
■液体アンモニアとして回収する方法におけるアンモニ
アの吸収方法の例
イ、ＵＳＰ３１８６７９５ （第７図参照）吸収装置ニ
スプレ一方式 ２段
洗浄液 ニー燐酸アンモニウム水溶液
■アンモニアの燃焼分解におけるアンモニアの吸収方法
の例
イ。■Example of ammonia absorption method in the method of recovering it as ammonium sulfate A, JP-A-59-203725 (see Figure 4) Absorption device Nispre one-way type 1-stage cleaning liquid: Dilute sulfuric acid aqueous solution port, JP-A-60-264322 (No. 6) (See figure) Absorber: Nispre one-way type Two-stage cleaning liquid: Dilute sulfuric acid aqueous solution c, JP-A-61-192794 (See Figure 5) Absorber: Packed tower type Cleaning liquid: Weakly acidic ammonium sulfate aqueous solution■ In the method of recovering as liquid ammonia Example of ammonia absorption method A, USP 3186795 (see Figure 7) Absorption device Nispre one type Two-stage cleaning liquid Niammonium phosphate aqueous solution ■Example of ammonia absorption method in combustion decomposition of ammonia A.
吸収装置ニスプレ一方式 ２段
洗浄液 ニー燐酸アンモニウム水溶液
口、ＵＳＰ３１８６７９５
吸収装置ニスプレ一方式 ２段
洗浄液 ニー燐酸アンモニウム水溶液
〈発明が解決しようとする課題〉
第４図に示すもの（特開昭５９−２０３７２５）では、
粗コークス炉ガス人口Ｘよりアンモニア吸収塔１にコー
クス炉ガスを入れ、母液循環４！３１からの硫酸水溶液
をスプレーして塔頂のコークス炉ガス出口Ｙより精製コ
ークス炉ガスを得、塔底より硫酸アンモニア水溶液Ａを
得ている。Absorber Nispre one-type two-stage cleaning solution Nispre one-type two-stage cleaning solution Nispre monophosphate aqueous solution port, USP 3186795 Absorber Nispre one-type two-stage cleaning solution Nispre one-type two-stage cleaning solution (Problems to be Solved by the Invention) What is shown in Figure 4 (Japanese Patent Application Laid-Open No. 59-203725) So,
The coke oven gas is introduced into the ammonia absorption tower 1 from the crude coke oven gas population X, and the sulfuric acid aqueous solution from the mother liquor circulation 4!31 is sprayed to obtain purified coke oven gas from the coke oven gas outlet Y at the top of the tower, and from the bottom of the tower. Ammonia sulfate aqueous solution A is obtained.
第６図に示すもの（特開昭６Ｏ−２６４３２２）では、
アンモニア吸収塔１は二段になってはいるものの、第４
図のものと同じスプレ一方式である。In the one shown in Fig. 6 (Japanese Unexamined Patent Publication No. 6O-264322),
Although the ammonia absorption tower 1 has two stages, the fourth
It is the same spray type as the one in the picture.
このようなスプレ一方式のアンモニア吸収塔を用いる場
合、Ｇ／Ｌ比を低くする必要があり、省エネルギー上、
好ましくない。When using such a one-spray type ammonia absorption tower, it is necessary to lower the G/L ratio, which reduces energy consumption.
Undesirable.
また、第５図（特開昭６ｌ−１９２７９４）に示される
ように、液循環槽３１からの弱酸性の硫安水溶液でアン
モニアを吸収した後、その吸収液を硫安製造および硫酸
製造に切替え可能な処理装置に送り、状況に応じて硫安
もしくは硫酸または両者を製造する方法が知られている
。In addition, as shown in FIG. 5 (Japanese Patent Application Laid-Open No. 61-192794), after ammonia is absorbed with a weakly acidic ammonium sulfate aqueous solution from the liquid circulation tank 31, the absorption liquid can be switched to ammonium sulfate production and sulfuric acid production. A method is known in which ammonium sulfate, sulfuric acid, or both are produced depending on the situation by sending it to a processing device.
しかしながら、上記の方法である弱酸性の硫安水溶液で
充填塔を用いて吸収する方法では、低硫安濃度溶液を循
環するが粗コークス炉ガスの偏流、硫安水溶液の偏流、
外気温の低下等により内部充填剤へ結晶の析出が生ずる
場合がある、更に操作条件のガス／液比（Ｇ／Ｌ＝Ｎｍ
３／ｍ’）が低く、かつ弱酸性硫安水溶液である為、吸
収塔の出口アンモニア濃度が高い。However, in the above method of absorbing a weakly acidic ammonium sulfate aqueous solution using a packed column, although the low ammonium sulfate concentration solution is circulated, there is a drift of the crude coke oven gas, a drift of the ammonium sulfate aqueous solution,
Crystals may precipitate on the internal filler due to a drop in outside temperature, etc. Furthermore, the gas/liquid ratio (G/L=Nm
3/m') and is a weakly acidic ammonium sulfate aqueous solution, the ammonia concentration at the outlet of the absorption tower is high.
また、硫安製造装置、硫酸製造装置で濃縮する必要が生
じる。In addition, it becomes necessary to concentrate using an ammonium sulfate production device or a sulfuric acid production device.
また、第７図に示されるもの（ＵＳＰ３１８６７９５）
では、燐酸アンモニア水溶液Ｐを用いてアンモニアをコ
ークス炉ガスから除去するとともに燐酸アンモニア水溶
液Ｂを得るのであるが、第６図のものと同様にスプレ一
方式であるため、第６図のものと同じ問題点を有してい
る。Also, what is shown in Figure 7 (USP3186795)
In this case, the ammonia phosphate aqueous solution P is used to remove ammonia from the coke oven gas and the ammonia phosphate aqueous solution B is obtained, but since it is a one-spray type like the one in Fig. 6, it is the same as the one in Fig. 6. There are problems.
したがって、本発明の目的は、用いる吸収液の酸の種類
によらず対応でき、かつ吸収条件のＧ／Ｌ比を高くして
コークス炉ガス中からアンモニアをほぼ完全に除去する
ことのできるコークスガス中のアンモニアを吸収除去す
る方法を提供しようとするにある。Therefore, an object of the present invention is to provide a coke gas that can be used regardless of the type of acid in the absorption liquid used, and that can almost completely remove ammonia from coke oven gas by increasing the G/L ratio of the absorption conditions. The aim is to provide a method for absorbing and removing ammonia in the liquid.
本発明の他の目的は、上記のようにしてコークス炉ガス
中のアンモニアを吸収した吸収液を用いて、必要に応じ
て硫安または液体アンモニアを製造するようにした硫安
または液体アンモニアの装置方法を提供しようとするに
ある。Another object of the present invention is to provide an ammonium sulfate or liquid ammonia apparatus method for producing ammonium sulfate or liquid ammonia as necessary using the absorption liquid that has absorbed ammonia in coke oven gas as described above. That's what we're trying to offer.
く課題を解決するための手段〉
本発明によれば、コークス炉ガス中のアンモニアを吸収
装置と洗浄液を用いて吸収除去する方法において、吸収
装置のアンモニア吸収塔を上、下２段に分け、上段に設
けた１以上の棚段の最上段の上に酸濃度の高い洗浄液を
供給し、下段には、酸濃度の低い洗浄液をスプレーする
ことを特徴とするコークス炉ガス中のアンモニアを吸収
除去する方法が提供される。Means for Solving the Problems> According to the present invention, in a method for absorbing and removing ammonia in coke oven gas using an absorber and a cleaning liquid, the ammonia absorption tower of the absorber is divided into two stages, an upper and a lower stage, A method for absorbing and removing ammonia in coke oven gas, characterized by supplying a cleaning liquid with a high acid concentration onto the top shelf of one or more shelves provided in the upper stage, and spraying a cleaning liquid with a low acid concentration onto the lower shelf. A method is provided.
ここで、前記アンモニア吸収塔の上段の棚段の最上段の
上に供給する酸濃度の高い洗浄液が硫酸であり、下段に
スプレーする酸濃度の低い洗浄液が遊離硫酸濃度の低い
硫安水溶液であるのが好ましい。Here, the cleaning liquid with a high acid concentration supplied to the top of the upper shelf of the ammonia absorption tower is sulfuric acid, and the cleaning liquid with a low acid concentration sprayed onto the lower stage is an ammonium sulfate aqueous solution with a low concentration of free sulfuric acid. is preferred.
前記アンモニア吸収塔の上段の棚段の最上段の上に供給
する酸濃度の高い洗浄液が一燐酸アンモニア水溶液であ
り、下段にスプレーする酸濃度の低い洗浄液がアンモニ
アを多く含む燐酸アンモニア水溶液であるのが好ましい
。The cleaning solution with a high acid concentration supplied to the top of the uppermost shelf of the ammonia absorption tower is an ammonia monophosphate aqueous solution, and the cleaning solution with a low acid concentration sprayed onto the lower stage is an aqueous ammonia phosphate solution containing a large amount of ammonia. is preferred.
このようにして得られたアンモニア吸収液は硫安また液
体アンモニア製造装置に送られて、必要に応じて硫安ま
たは液体アンモニアの製造に供することができる。The ammonia absorption liquid thus obtained can be sent to an apparatus for producing ammonium sulfate or liquid ammonia, and can be used for producing ammonium sulfate or liquid ammonia as required.
以下に本発明を更に詳細に説明する。The present invention will be explained in more detail below.
第１図は、本発明方法を実施する装置全体の１例を示す
。FIG. 1 shows an example of an overall apparatus for carrying out the method of the present invention.
まず、石炭を乾留する際に副生ずる粗コークス炉ガス中
には、ガス液、タール、ベンゼン類等の他に酸性ガス成
分（Ｈ２Ｓ、ＨＣＮ、ＣＯ２等）及びアンモニア等の揮
発性ガス成分が含有されている。First, the crude coke oven gas produced as a by-product when carbonizing coal contains acid gas components (H2S, HCN, CO2, etc.) and volatile gas components such as ammonia in addition to gas liquid, tar, benzene, etc. has been done.
このため、これら不純物を含有する粗コークス炉ガスを
そのまま燃焼させると、Ｈ２ＳはＳｏｘ、ＨＣＮ等の窒
素化合物はＮＯＸに転換されるため、燃料として用いる
際に除去している。Therefore, if crude coke oven gas containing these impurities is burned as is, nitrogen compounds such as H2S, Sox, and HCN are converted to NOx, so they are removed when used as fuel.
酸性ガス成分を前処理工程で除去した粗コークス炉ガス
は、入口Ｘよりアンモニア吸収塔１に入る。The crude coke oven gas from which acidic gas components have been removed in the pretreatment step enters the ammonia absorption tower 1 through the inlet X.
アンモニア吸収塔１は、上段１ａおよび下段１ｂに分れ
ており下段１ｂでは、比較的酸濃度の低い吸収液（洗浄
液）をスプレー、リサイクルして粗コークス炉ガス中の
アンモニアを向流接触し、下段１ｂから上段１ａへと上
昇する間に粗コークス炉ガス中のアンモニアは吸収除去
される。The ammonia absorption tower 1 is divided into an upper stage 1a and a lower stage 1b, and in the lower stage 1b, an absorption liquid (cleaning liquid) with a relatively low acid concentration is sprayed and recycled to countercurrently contact ammonia in the crude coke oven gas. Ammonia in the crude coke oven gas is absorbed and removed while rising from the lower stage 1b to the upper stage 1a.
上段１ａは、１段以上の棚段（トレー）を有し、この棚
段の最上部上に下段１ｂにおいて、より酸濃度の高い吸
収液（洗浄液）が供給され下段１ｂで除去されなかった
アンモニアが吸収（洗浄）液に吸収除去される。 上段
１ａに供給される吸収液の相当量は下段１ｂｋ：越流さ
せる。The upper stage 1a has one or more shelves (trays), and an absorbing liquid (cleaning liquid) with a higher acid concentration is supplied to the uppermost part of the tray in the lower stage 1b, and the ammonia that was not removed in the lower stage 1b is supplied to the upper stage 1a. is absorbed and removed by the absorption (washing) liquid. A considerable amount of the absorption liquid supplied to the upper stage 1a is caused to flow over the lower stage 1bk.
上段で用いる吸収液のｐＨは６以下（好ましくは５以下
）にするのが好ましく、下段で用いる吸収液のｐＨは８
以下として操業すれば、アンモニア吸収塔１の出口Ｙに
おける精製コークス炉ガスのアンモニア濃度は０．１ｇ
／Ｎｍ’にすることができる。The pH of the absorption liquid used in the upper stage is preferably 6 or less (preferably 5 or less), and the pH of the absorption liquid used in the lower stage is 8.
If the operation is performed as follows, the ammonia concentration of the purified coke oven gas at the outlet Y of the ammonia absorption tower 1 will be 0.1 g.
/Nm'.
硫安を製造するときには、吸収（洗浄）液として硫酸ま
たはその水溶液Ｓを用い、得られた硫酸アンモニア水溶
液Ａは第２図に例示する硫安製造装置に送られ処理され
る。 第２図において、１０は蒸発缶、１１は結晶缶、
１２は真空発生装置、１３は分離・乾燥装置である。When producing ammonium sulfate, sulfuric acid or its aqueous solution S is used as an absorption (washing) liquid, and the obtained aqueous ammonia sulfate solution A is sent to the ammonium sulfate production apparatus illustrated in FIG. 2 and treated. In FIG. 2, 10 is an evaporator, 11 is a crystallizer,
12 is a vacuum generator, and 13 is a separation/drying device.
硫安価格の季節変動によって液体アンモニアを製造する
方が有利なときには、吸収（洗浄）液として燐酸アンモ
ニア水溶液Ｐを用い、得られた燐酸アンモニア水溶液Ｂ
は第３図に例示する液体アンモニア製造装置に送られ処
理される。 第３図において、１５はアンモニア放散塔
、１６は蒸留塔（精留塔）である。When it is advantageous to produce liquid ammonia due to seasonal fluctuations in ammonium sulfate prices, an ammonia phosphate aqueous solution P is used as the absorption (cleaning) liquid, and the resulting ammonia phosphate aqueous solution B
is sent to the liquid ammonia production apparatus illustrated in FIG. 3 and processed. In FIG. 3, 15 is an ammonia stripping column, and 16 is a distillation column (rectification column).
〈実施例〉 以下に本発明を実施例に基づき具体的に説明する。<Example> The present invention will be specifically explained below based on Examples.
コークス炉で副生ずるコークス炉ガスを第１図に示す本
発明の方式、ならびに、第４図、第５図、第６図および
第７図に示す方式（比較例）にしたがフて、第１表に示
す種々の操業条件で、硫安または液体アンモニアを製造
する例として本発明方法および従来方法を実施した。The coke oven gas by-produced in a coke oven was treated according to the method of the present invention shown in FIG. 1 and the methods (comparative examples) shown in FIGS. 4, 5, 6, and 7. The method of the present invention and the conventional method were carried out as examples for producing ammonium sulfate or liquid ammonia under various operating conditions shown in Table 1.
第１表に示す結果から明らかなように、本発明例は比較
例に比べて、アンモニア吸収塔内でのＧ／Ｌ比を高くと
ることができ、またアンモニア吸収塔内でのコークス炉
ガスからのアンモニア除去は非常に優れている。As is clear from the results shown in Table 1, the example of the present invention can have a higher G/L ratio in the ammonia absorption tower than the comparative example, and the coke oven gas can be removed from the ammonia absorption tower. Ammonia removal is very good.
〈発明の効果〉
本発明は、アンモニア吸収塔を、１以上の棚段を有する
上段部および下段部に２段に分けることにより吸収塔出
口のコークス炉ガス中のアンモニア濃度の著減を可能に
した。<Effects of the Invention> The present invention makes it possible to significantly reduce the ammonia concentration in the coke oven gas at the outlet of the absorption tower by dividing the ammonia absorption tower into two stages, an upper part and a lower part each having one or more trays. did.
また、本発明は、アンモニア吸収塔に用いる吸収液の酸
の種類によらず対応ができ、かつ吸収条件のＧ／Ｌ比を
高くできる。Further, the present invention can be applied regardless of the type of acid in the absorption liquid used in the ammonia absorption tower, and can increase the G/L ratio of absorption conditions.
さらに、アンモニア吸収塔より抜き出される吸収液の酸
濃度が低濃度であることから、アンモニア吸収塔の棚段
部以外は、従来の耐食材から通常の５ＵＳ３０４相当材
質を使用することが可能となる。Furthermore, since the acid concentration of the absorption liquid extracted from the ammonia absorption tower is low, it is possible to use conventional corrosion-resistant materials equivalent to 5US304 for the parts other than the trays of the ammonia absorption tower. .
第１図は本発明のコークス炉ガスからのアンモニアの除
去方法を説明するための線図である。
第２図および第３図は、それぞれ本発明方法で得られた
アンモニア吸収液から硫安および液体アンモニアを製造
するフローチャー）・である。
第４図、第５図、第６図および第７図は、従来方法を説
明するための線図である。
符号の説明
Ｙ・・・粗コークス炉ガス人口、
Ｘ・・・コークス炉ガス出口、
１・・・アンモニア吸収塔、
１ａ・・・アンモニア吸収上段、
１ｂ・・・アンモニア吸収下段、
Ｓ・・・硫酸（希釈水を含む場合もある）、Ｐ・・・燐
酸アンモニア水溶液、
Ａ・・・１酸アンモニア水ｍ 液、
Ｂ・・・燐酸アンモニア水溶液、
１０・・・蒸発缶、
１１・・・結晶缶、
１２・・・真空発生装置、
１３・・・分離・乾燥装置、
１５・・・アンモニア放散塔、
１６・・・蒸留塔（精留塔）、FIG. 1 is a diagram for explaining the method of removing ammonia from coke oven gas according to the present invention. Figures 2 and 3 are flowcharts for producing ammonium sulfate and liquid ammonia from the ammonia absorption liquid obtained by the method of the present invention, respectively. FIG. 4, FIG. 5, FIG. 6, and FIG. 7 are diagrams for explaining the conventional method. Explanation of symbols Y...Rough coke oven gas population, X...Coke oven gas outlet, 1...Ammonia absorption tower, 1a...Ammonia absorption upper stage, 1b...Ammonia absorption lower stage, S... Sulfuric acid (may contain dilution water), P...Ammonia phosphate aqueous solution, A...1 acid ammonia aqueous solution, B...Ammonia phosphate aqueous solution, 10...Evaporator, 11...Crystals Can, 12... Vacuum generator, 13... Separation/drying device, 15... Ammonia stripping tower, 16... Distillation column (rectification column),
Claims (6)
液を用いて吸収除去する方法において、吸収装置のアン
モニア吸収塔を上、下２段に分け、上段に設けた１以上
の棚段の最上段の上に酸濃度の高い洗浄液を供給し、下
段には、酸濃度の低い洗浄液をスプレーすることを特徴
とするコークス炉ガス中のアンモニアを吸収除去する方
法。(1) In a method of absorbing and removing ammonia in coke oven gas using an absorption device and a cleaning liquid, the ammonia absorption tower of the absorption device is divided into two stages, an upper and a lower stage, and the top stage of one or more shelves provided in the upper stage. A method for absorbing and removing ammonia in coke oven gas, characterized by supplying a cleaning liquid with a high acid concentration on the upper stage and spraying a cleaning liquid with a low acid concentration on the lower stage.
に供給する酸濃度の高い洗浄液が硫酸であり、下段にス
プレーする酸濃度の低い洗浄液が遊離硫酸濃度の低い硫
安水溶液である請求項１に記載のコークス炉ガス中のア
ンモニアを吸収除去する方法。(2) A claim in which the cleaning liquid with a high acid concentration supplied to the uppermost stage of the upper shelf of the ammonia absorption tower is sulfuric acid, and the cleaning liquid with a low acid concentration sprayed onto the lower stage is an ammonium sulfate aqueous solution with a low concentration of free sulfuric acid. Item 1. The method for absorbing and removing ammonia in coke oven gas according to item 1.
に供給する酸濃度の高い洗浄液が一燐酸アンモニア水溶
液であり、下段にスプレーする酸濃度の低い洗浄液がア
ンモニアを多く含む燐酸アンモニア水溶液である請求項
１に記載のコークス炉ガス中のアンモニアを吸収除去す
る方法。(3) The cleaning liquid with a high acid concentration supplied to the top of the upper shelf of the ammonia absorption tower is an ammonia monophosphate aqueous solution, and the cleaning liquid with a low acid concentration sprayed to the lower stage is an ammonia phosphate aqueous solution containing a large amount of ammonia. A method for absorbing and removing ammonia in coke oven gas according to claim 1.
中のアンモニアを吸収した吸収液を硫安製造装置を用い
て処理し、硫安を得ることを特徴とする硫安の製造方法
。(4) A method for producing ammonium sulfate, which comprises treating the absorption liquid that has absorbed ammonia in coke oven gas obtained by the method according to claim 2 using an ammonium sulfate production apparatus to obtain ammonium sulfate.
中のアンモニアを吸収した吸収液を液体アンモニア製造
装置を用いて処理し、液体アモンニアを得ることを特徴
とする液体アンモニアの製造方法。(5) A method for producing liquid ammonia, characterized in that the absorption liquid that has absorbed ammonia in coke oven gas obtained by the method according to claim 3 is treated using a liquid ammonia production apparatus to obtain liquid ammonia. .
３に記載の方法によりコークス炉ガス中のアンモニアを
吸収した吸収液を得、これをそれぞれ硫安製造装置また
は液体アンモニア製造装置により処理して硫安または液
体アンモニアを得ることを特徴とする硫安または液体ア
ンモニアの製造方法。(6) Using the same ammonia absorption tower, obtain an absorption liquid that has absorbed ammonia in coke oven gas by the method according to claim 2 or 3, and treat this with an ammonium sulfate production device or a liquid ammonia production device, respectively. A method for producing ammonium sulfate or liquid ammonia, characterized in that ammonium sulfate or liquid ammonia is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63127349A JPH01298016A (en) | 1988-05-25 | 1988-05-25 | Method for removing ammonia in coke oven gas by absorbing and production of ammonium sulfate or liquid ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63127349A JPH01298016A (en) | 1988-05-25 | 1988-05-25 | Method for removing ammonia in coke oven gas by absorbing and production of ammonium sulfate or liquid ammonia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01298016A true JPH01298016A (en) | 1989-12-01 |
Family
ID=14957730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63127349A Pending JPH01298016A (en) | 1988-05-25 | 1988-05-25 | Method for removing ammonia in coke oven gas by absorbing and production of ammonium sulfate or liquid ammonia |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01298016A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100644119B1 (en) * | 1997-06-20 | 2007-05-14 | 더 스탠다드 오일 캄파니 | Recovery and Recycling of Ammonia from Acrylonitrile Reactor Effluent Flow by Ammonium Phosphate Quench System |
| CN102580499A (en) * | 2012-01-05 | 2012-07-18 | 江苏融泰化工有限公司 | Method for treating ammonia-containing waste gas |
| JP2014237566A (en) * | 2013-06-07 | 2014-12-18 | Ｊｆｅケミカル株式会社 | Method for producing granular ammonium sulfate |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60264322A (en) * | 1984-06-14 | 1985-12-27 | Kawasaki Steel Corp | Preparation of by-product ammonium sulfate from coke oven gas |
-
1988
- 1988-05-25 JP JP63127349A patent/JPH01298016A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60264322A (en) * | 1984-06-14 | 1985-12-27 | Kawasaki Steel Corp | Preparation of by-product ammonium sulfate from coke oven gas |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100644119B1 (en) * | 1997-06-20 | 2007-05-14 | 더 스탠다드 오일 캄파니 | Recovery and Recycling of Ammonia from Acrylonitrile Reactor Effluent Flow by Ammonium Phosphate Quench System |
| CN102580499A (en) * | 2012-01-05 | 2012-07-18 | 江苏融泰化工有限公司 | Method for treating ammonia-containing waste gas |
| JP2014237566A (en) * | 2013-06-07 | 2014-12-18 | Ｊｆｅケミカル株式会社 | Method for producing granular ammonium sulfate |
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