JP2015107484A - Sludge dewatering conditioning agent and deep dewatering method thereof - Google Patents

Sludge dewatering conditioning agent and deep dewatering method thereof Download PDF

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JP2015107484A
JP2015107484A JP2014242032A JP2014242032A JP2015107484A JP 2015107484 A JP2015107484 A JP 2015107484A JP 2014242032 A JP2014242032 A JP 2014242032A JP 2014242032 A JP2014242032 A JP 2014242032A JP 2015107484 A JP2015107484 A JP 2015107484A
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sludge
dewatering
coke
semi
polyacrylamide
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JP5966217B2 (en
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ツァイシェン ダイ
Caisheng Dai
ツァイシェン ダイ
ソンジアン マ
Songjiang Ma
ソンジアン マ
リアンリアン リウ
Liangliang Liu
リアンリアン リウ
リジン リャン
Lijing Liang
リジン リャン
シャオファン リウ
Xiaofang Liu
シャオファン リウ
シュェペン リウ
Xuepeng Liu
シュェペン リウ
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フナン ユニバーシティ オブ サイエンス アンド テクノロジーHunan University of Science and Technology
Hunan Univ Of Science & Technology
フナン ユニバーシティ オブ サイエンス アンド テクノロジーHunan University of Science and Technology
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Abstract

PROBLEM TO BE SOLVED: To provide a sludge dewatering conditioning agent and a deep dewatering method thereof which belong to the technical field of urban sewage and sludge treatment.SOLUTION: The invention discloses the novel sludge conditioning agent. The sludge conditioning agent comprises polyacrylamide and a coal pyrolysis product, namely semicoke. The invention also discloses a method for treating the sludge by using the conditioning agent, the method comprises the following steps: firstly, concentrating and dewatering the sludge by using the conditioning agent, wherein the BOD, COD and SS of supernatant liquor after concentrating and dewatering can meet secondary sewage drain standard, and the water content of the treated sludge is less than 80%; and then, directly filter-pressing and dewatering the concentrated and dewatered sludge, wherein the water content of the treated sludge is less than 50%. The sludge conditioning agent for use in the invention is extremely strong in adsorption capacity, low in cost and excellent in performance; the sludge treatment process is simple, the dewatering time is short and the water content of the sludge is low; the dewatered sludge can be directly recycled without drying and dewatering, so that the sludge dewatering conditioning agent has good application prospect.

Description

本発明は都市の生活汚水汚泥の処理技術分野に属し、汚泥脱水調整剤及びその高度脱水方法に関する。   TECHNICAL FIELD The present invention belongs to a treatment technology field for domestic sewage sludge in cities, and relates to a sludge dewatering regulator and an advanced dewatering method thereof.
我が国の経済の高速発展に従って、都市汚水の処理量が不断に増長し、汚水の処理過程に、大量の汚泥が発生し、我が国の汚水処理場の建設に深刻な「汚水に重視するが汚泥に軽視する」現象が存在するので、大量の汚泥の「オーバーストック」を引き起こし、適当且つ安全的な処理が行われない。適当に処理されない汚泥が環境に投入された後、直接に環境に深刻な二次汚染をもたらし、汚水処理システムの効果的な処理能力を低下するだけでなく、更に生態環境と人間の生活に強い脅威を発生する。人々が汚泥の有害性に対する認識の向上に従って、どのように適当に汚泥を処理することは既に各国の学者が共同に注目する問題になる。   With the rapid development of Japan's economy, the amount of urban sewage treatment has increased steadily, and a large amount of sludge is generated in the sewage treatment process, which is serious in the construction of sewage treatment plants in Japan. Since there is a phenomenon of “disregarding”, it causes “overstock” of a large amount of sludge, and appropriate and safe treatment is not performed. After sludge that is not properly treated is put into the environment, it not only brings serious secondary pollution directly to the environment, but also reduces the effective treatment capacity of the sewage treatment system, as well as being strong for ecological environment and human life Generate a threat. How to properly treat sludge as people become more aware of the harmfulness of sludge is already a problem that scholars in various countries jointly pay attention to.
濃縮処理した後の汚泥は、含水率が95%−99%に達し、まだ流動可能な状態であり、腐敗し臭いを発生しやすく、輸送と処理し難いので、常に更なる脱水処理を必要とする。従来の汚泥調質技術において、一般的に凝集剤などの薬剤を添加して汚泥を調質して、更に機械的脱水を行い、機械的脱水を行った後汚泥の含水率が一般的に70%−80%であり、まだ、汚泥の資源化の利用に不利で、燃料として使用すると、更に汚泥を乾燥化処理する必要があり、汚泥の乾燥処理コストが高い。   The sludge after the concentration treatment has a moisture content of 95% to 99%, is still in a fluid state, is likely to rot and generate odors, and is difficult to transport and treat. To do. In the conventional sludge refining technology, generally, a chemical such as a flocculant is added to condition sludge, and further mechanical dehydration is performed. After mechanical dehydration, the water content of sludge is generally 70. % -80%, which is still unfavorable for the utilization of sludge resources, and when used as fuel, it is necessary to further dry the sludge, and the sludge drying treatment cost is high.
上記技術問題を解決するために、本発明は、汚泥脱水調整剤及びその高度脱水方法を提供する。   In order to solve the above technical problem, the present invention provides a sludge dewatering regulator and its advanced dewatering method.
本発明が上記技術問題を解決するための技術案は以下のとおりである。汚泥調整剤であって、半成コークスとポリアクリルアミドを含み、半成コークスは、褐炭又は長炎炭が500℃〜650℃で1.0〜1.5h熱分解されて得られた生成物であり、半成コークスの粒度は0.045mm〜0.425mmであり、使用するポリアクリルアミドは粒状固体であり、相対分子質量は800万〜1200万である。   The technical solution for the present invention to solve the above technical problems is as follows. A sludge conditioner comprising semi-coke and polyacrylamide, the semi-coke is a product obtained by pyrolyzing brown coal or long flame coal at 500 ° C. to 650 ° C. for 1.0 to 1.5 hours. Yes, the particle size of semi-coke is 0.045 mm to 0.425 mm, the polyacrylamide used is a granular solid, and the relative molecular mass is 8 million to 12 million.
上記汚泥調整剤を用いる高度脱水方法は、以下のステップを含む。
(1)汚泥の調質:含水汚泥に半成コークスを添加し、半成コークスの投与量は含水汚泥の重量の2%〜4%であり、10〜20min撹拌し、その後、更にポリアクリルアミドを添加し、5〜10min撹拌し、ポリアクリルアミドの投与量は含水汚泥の重量の0.0001%〜0.0004%である。
(2)脱水:調質し終わった汚泥を沈殿タンクに15〜20min静置し、次に、沈殿タンクの底部から濃縮汚泥を抽出して、フィルタプレスに送入し、加圧ろ過して脱水し、0.8−3MPaの圧力の下で20〜40min保持し、脱水した後の汚泥の含水率は40%〜50%である。
The advanced dehydration method using the sludge adjusting agent includes the following steps.
(1) Sludge tempering: Semi-coke is added to the hydrous sludge, the dosage of semi-coke is 2% to 4% of the weight of the hydrous sludge, stirred for 10-20 min, and then further polyacrylamide Add and stir for 5-10 min, the polyacrylamide dosage is 0.0001% -0.0004% of the weight of the hydrous sludge.
(2) Dehydration: The tempered sludge is allowed to stand in the sedimentation tank for 15 to 20 minutes, then concentrated sludge is extracted from the bottom of the sedimentation tank, sent to a filter press, filtered under pressure, and dehydrated. And the moisture content of the sludge after hold | maintaining for 20 to 40 min under the pressure of 0.8-3 MPa, and dehydrating is 40%-50%.
従来の技術と比べて、本発明の利益な効果は以下のとおりである。
(1)本発明は化学調質と機械的脱水を組み合わせる方法を採用し、プロセスが簡単で、採用した調整剤は半成コークスとポリアクリルアミドであり、コストが低く、且つ添加したポリアクリルアミドの量が非常に少なく、環境に対する危害は小さい。
(2)本発明の調整剤に使用する半成コークスの毛穴が多くて、吸着ブリッジング役割により、汚泥コロイド粒子の安定性を破壊することができ、分散した小さな粒子を大きな粒子に集め、その後、添加した高分子凝集剤であるポリアクリルアミドは、自体のブリッジング役割により、ネッティング汚泥粒子が共に沈下し、沈降時間を短縮する。調質した後、汚泥の沈降速率(速度)が著しく増速し、前の20minの沈降速度は調質前の3.03L/minから調質後の4.37L/minに向上し、より良い調質効果に達する。
(3)本発明の汚泥が脱水した後、濾過ケークの含水率が50%以下に低下し、汚泥の減量化処理の目的に達し、汚泥に半成コークスを添加して、熱値を向上させるので、脱水した後の汚泥に石炭水スラリーを直接に混合して燃焼することができ、汚泥の資源化利用に条件を提供し、大幅にコストを節約し、良い応用将来性を有する。
(4)本発明における濃縮脱水した後の上澄み液でのSS、BOD、CODなどの指標は汚水処理の排出基準に達し、直接に排出することができる。
Compared with the prior art, the beneficial effects of the present invention are as follows.
(1) The present invention adopts a method combining chemical tempering and mechanical dehydration, the process is simple, the adopted regulators are semi-coke and polyacrylamide, the cost is low, and the amount of added polyacrylamide There is very little damage to the environment.
(2) There are many pores of semi-coke used in the regulator of the present invention, and the adsorption bridging role can destroy the stability of the sludge colloidal particles, collecting dispersed small particles into large particles, The polyacrylamide, which is the added polymer flocculant, sinks together with the netting sludge particles due to its bridging role, thereby shortening the settling time. After the tempering, the sedimentation rate (rate) of the sludge is remarkably increased, and the precipitating rate for the previous 20 min is improved from 3.03 L / min before the tempering to 4.37 L / min after the tempering. Reaching tempering effect.
(3) After the sludge of the present invention is dehydrated, the moisture content of the filter cake is reduced to 50% or less, and the purpose of sludge reduction treatment is reached, and semi-coke is added to the sludge to improve the heat value. Therefore, it is possible to directly mix and burn the coal water slurry with the sludge after dehydration, providing conditions for sludge resource utilization, greatly saving cost, and having good application future.
(4) Indicators such as SS, BOD and COD in the supernatant liquid after concentration and dehydration in the present invention reach the discharge standard for sewage treatment and can be discharged directly.
以下、具体的な実施例により本発明を更に詳しく説明し、特に説明する以外、前記の原料部数は、いずれも重量部数である。   Hereinafter, the present invention will be described in more detail with reference to specific examples, and all the above-mentioned raw material parts are parts by weight, unless specifically described.
(実施例1)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、陝西石炭が650℃で1.0h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmで、半成コークスの投与量が含水汚泥の重量の2%であり、10minで十分に撹拌する。
2)その後、ポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0001%で、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで15min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して加圧ろ過して脱水させ、0.8MPaの圧力の下で20minで保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が49.8%である。
Example 1
1) Take sludge from a sewage treatment plant, its water content is 98%, and then add semi-coke, which is a product obtained by pyrolysis of Shaanxi coal at 650 ° C for 1.0 h, The particle size of the semi-coke is 0.045 mm to 0.425 mm, the dose of the semi-coke is 2% of the weight of the water-containing sludge, and it is sufficiently stirred for 10 minutes.
2) Thereafter, polyacrylamide is added, and the amount of polyacrylamide is 0.0001% of the weight of the water-containing sludge, and the mixture is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the sedimentation tank for 15 minutes, the concentrated sludge is extracted from the bottom of the sedimentation tank, introduced into a plate and a frame filter press, depressurized and dehydrated, and 0.8 MPa Hold for 20 min under pressure.
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 49.8%.
(実施例2)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、陝西石炭が650℃で1.0h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmであり、半成コークスの投与量が含水汚泥の重量の2%であり、10minで十分に撹拌する。
2)その後、ポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0002%で、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで20min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して加圧ろ過して脱水させ、2.0MPaの圧力の下で20minで保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が49.2%である。
(Example 2)
1) Take sludge from a sewage treatment plant, its water content is 98%, and then add semi-coke, which is a product obtained by pyrolysis of Shaanxi coal at 650 ° C for 1.0 h, The particle size of semi-coke is 0.045 mm to 0.425 mm, the dose of semi-coke is 2% of the weight of the water-containing sludge, and it is sufficiently stirred for 10 minutes.
2) Then, polyacrylamide is added, and the polyacrylamide dosage is 0.0002% of the weight of the water-containing sludge, and the mixture is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the precipitation tank for 20 minutes, the concentrated sludge is extracted from the bottom of the precipitation tank, introduced into a plate and a frame filter press, depressurized and dehydrated, and 2.0 MPa Hold for 20 min under pressure.
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 49.2%.
(実施例3)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、陝西石炭が650℃で1.0h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmで、半成コークスの投与量が含水汚泥の重量の3%であり、15minで十分に撹拌する。
2)その後、ポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0003%であり、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで20min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して加圧ろ過して脱水させ、3.0MPaの圧力の下で30min保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が45.9%である。
(Example 3)
1) Take sludge from a sewage treatment plant, its water content is 98%, and then add semi-coke, which is a product obtained by pyrolysis of Shaanxi coal at 650 ° C for 1.0 h, The particle size of semi-coke is 0.045 mm to 0.425 mm, the dose of semi-coke is 3% of the weight of the water-containing sludge, and it is sufficiently stirred for 15 minutes.
2) Thereafter, polyacrylamide is added, and the dose of polyacrylamide is 0.0003% of the weight of the water-containing sludge, which is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the precipitation tank for 20 minutes, the concentrated sludge is extracted from the bottom of the precipitation tank, introduced into a plate and a frame filter press, depressurized and dehydrated, Hold for 30 min under pressure.
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 45.9%.
(実施例4)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、陝西石炭が650℃で1.5h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmで、半成コークスの投与量が含水汚泥の重量の3%であり、15minで十分に撹拌する。
2)その後、ポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0003%であり、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで20min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して加圧ろ過して脱水させ、3.0MPaの圧力の下で40min保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が45.1%である。
Example 4
1) Take sludge from a sewage treatment plant, the water content is 98%, and then add semi-coke, which is a product obtained by pyrolysis of Shaanxi coal at 650 ° C for 1.5 h, The particle size of semi-coke is 0.045 mm to 0.425 mm, the dose of semi-coke is 3% of the weight of the water-containing sludge, and it is sufficiently stirred for 15 minutes.
2) Thereafter, polyacrylamide is added, and the dose of polyacrylamide is 0.0003% of the weight of the water-containing sludge, which is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the precipitation tank for 20 minutes, the concentrated sludge is extracted from the bottom of the precipitation tank, introduced into a plate and a frame filter press, depressurized and dehydrated, Hold for 40 min under pressure.
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 45.1%.
(実施例5)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、陝西石炭が650℃で2.0h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmであり、半成コークスの投与量が含水汚泥の重量の3%で、15minで十分に撹拌する。
2)その後、ポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0003%であり、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで20min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して加圧ろ過して脱水させ、3.0MPaの圧力の下で20min保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が44.5%である。
(Example 5)
1) Take sludge from a sewage treatment plant, its water content is 98%, and then add semi-coke which is a product obtained by pyrolysis of Shaanxi coal at 650 ° C for 2.0 h, The particle size of semi-coke is 0.045 mm to 0.425 mm, the dose of semi-coke is 3% of the weight of the water-containing sludge, and it is sufficiently stirred for 15 minutes.
2) Thereafter, polyacrylamide is added, and the dose of polyacrylamide is 0.0003% of the weight of the water-containing sludge, which is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the precipitation tank for 20 minutes, the concentrated sludge is extracted from the bottom of the precipitation tank, introduced into a plate and a frame filter press, depressurized and dehydrated, Hold for 20 min under pressure.
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 44.5%.
(実施例6)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、陝西石炭が650℃で2.0h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmであり、半成コークスの投与量が含水汚泥の重量の4%であり、20minで十分に撹拌する。
2)その後、ポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0002%であり、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで20min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して、3.0MPaの圧力の下で20min保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が41.0%である。
(Example 6)
1) Take sludge from a sewage treatment plant, its water content is 98%, and then add semi-coke which is a product obtained by pyrolysis of Shaanxi coal at 650 ° C for 2.0 h, The particle size of semi-coke is 0.045 mm to 0.425 mm, the dose of semi-coke is 4% of the weight of the water-containing sludge, and it is sufficiently stirred for 20 minutes.
2) Thereafter, polyacrylamide is added, and the dose of polyacrylamide is 0.0002% of the weight of the water-containing sludge, which is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the precipitation tank for 20 minutes, the concentrated sludge is extracted from the bottom of the precipitation tank, introduced into a plate and a frame filter press, and held at a pressure of 3.0 MPa for 20 minutes. .
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 41.0%.
(実施例7)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、雲南石炭が500℃で1.0h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmで、半成コークスの投与量が含水汚泥の重量の3%であり、10minで十分に撹拌する。
2)続いてポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0002%であり、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで15min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して加圧ろ過して脱水させ、2.0MPaの圧力の下で20min保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が45.3%である。
(Example 7)
1) Take sludge from a sewage treatment plant, the water content is 98%, and then add semi-coke which is a product obtained by pyrolysis of Yunnan coal at 500 ° C for 1.0 h, The particle size of semi-coke is 0.045 mm to 0.425 mm, the dose of semi-coke is 3% of the weight of the water-containing sludge, and it is sufficiently stirred for 10 minutes.
2) Subsequently, polyacrylamide is added, and the amount of polyacrylamide is 0.0002% of the weight of the water-containing sludge, which is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the sedimentation tank for 15 minutes, the concentrated sludge is extracted from the bottom of the sedimentation tank, introduced into a plate and a frame filter press, depressurized and dehydrated, and 2.0 MPa Hold for 20 min under pressure.
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 45.3%.
(実施例8)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、雲南石炭が500℃で1.5h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmであり、半成コークスの投与量が含水汚泥の重量の2%で、15minで十分に撹拌する。
2)その後、ポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0002%であり、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで15min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して加圧ろ過して脱水させ、2.0MPaの圧力の下で30min保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が48.7%である。
(Example 8)
1) Take sludge from a sewage treatment plant, the water content is 98%, and then add semi-coke, which is a product obtained by pyrolysis of Yunnan coal at 500 ° C for 1.5 h, The particle size of semi-coke is 0.045 mm to 0.425 mm, the dose of semi-coke is 2% of the weight of the water-containing sludge, and it is sufficiently stirred for 15 minutes.
2) Thereafter, polyacrylamide is added, and the dose of polyacrylamide is 0.0002% of the weight of the water-containing sludge, which is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the sedimentation tank for 15 minutes, the concentrated sludge is extracted from the bottom of the sedimentation tank, introduced into a plate and a frame filter press, depressurized and dehydrated, and 2.0 MPa Hold for 30 min under pressure.
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 48.7%.
(実施例9)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、雲南石炭が500℃で2.0h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmであり、半成コークスの投与量が含水汚泥の重量の2%であり、15minで十分に撹拌する。
2)その後、ポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0002%であり、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで15min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して加圧ろ過して脱水させ、2.0MPaの圧力の下で30min保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が48.4%である。
Example 9
1) Take sludge from a sewage sewage treatment plant, the water content is 98%, and then add semi-coke which is a product obtained by pyrolyzing Yunnan coal at 500 ° C for 2.0 h, The particle size of semi-coke is 0.045 mm to 0.425 mm, the dose of semi-coke is 2% of the weight of the water-containing sludge, and it is sufficiently stirred for 15 minutes.
2) Thereafter, polyacrylamide is added, and the dose of polyacrylamide is 0.0002% of the weight of the water-containing sludge, which is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the sedimentation tank for 15 minutes, the concentrated sludge is extracted from the bottom of the sedimentation tank, introduced into a plate and a frame filter press, depressurized and dehydrated, and 2.0 MPa Hold for 30 min under pressure.
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 48.4%.
(実施例10)
1)湘潭汚水処理場の汚泥を取り、その含水率が98%であり、次に、雲南石炭が500℃で1.5h熱分解して得られた生成物である半成コークスを添加し、半成コークスの粒度が0.045mm〜0.425mmであり、半成コークスの投与量が含水汚泥の重量の2%であり、20minで十分に撹拌する。
2)その後、ポリアクリルアミドを添加し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0004%であり、10minで撹拌する。
3)調質し終わった汚泥が沈殿タンクで20min静置した後、沈殿タンクの底部から濃縮汚泥を抽出し、プレートおよびフレームフィルタプレスに導入して加圧ろ過して脱水させ、3.0MPaの圧力の下で20min保持する。
4)圧力をリリーフして材料を排出する。
脱水した後の濾過ケークの含水率が48.0%である。
(Example 10)
1) Take sludge from a sewage treatment plant, the water content is 98%, and then add semi-coke, which is a product obtained by pyrolysis of Yunnan coal at 500 ° C for 1.5 h, The particle size of semi-coke is 0.045 mm to 0.425 mm, the dose of semi-coke is 2% of the weight of the water-containing sludge, and it is sufficiently stirred for 20 minutes.
2) Thereafter, polyacrylamide is added, and the amount of polyacrylamide is 0.0004% of the weight of the water-containing sludge, which is stirred for 10 minutes.
3) After the tempered sludge has been allowed to stand in the precipitation tank for 20 minutes, the concentrated sludge is extracted from the bottom of the precipitation tank, introduced into a plate and a frame filter press, depressurized and dehydrated, Hold for 20 min under pressure.
4) Relieve pressure and discharge material.
The water content of the filter cake after dehydration is 48.0%.

Claims (4)

  1. 汚泥脱水調整剤であって、石炭の熱分解生成物である半成コークスとポリアクリルアミドを含むことを特徴とする汚泥脱水調整剤。   A sludge dewatering regulator, comprising semi-coke, which is a thermal decomposition product of coal, and polyacrylamide.
  2. 前記半成コークスは、褐炭又は長炎炭が500℃〜650℃で1.0〜2.0h熱分解して得られた生成物であり、半成コークスの粒度が0.045mm〜0.425mmであり、前記ポリアクリルアミドの相対分子質量が800万〜1200万であることを特徴とする請求項1に記載の汚泥脱水調整剤。   The semi-coke is a product obtained by thermally decomposing brown coal or long flame coal at 500 ° C. to 650 ° C. for 1.0 to 2.0 h, and the particle size of the semi-coke is 0.045 mm to 0.425 mm. The sludge dehydration regulator according to claim 1, wherein the relative molecular mass of the polyacrylamide is 8 million to 12 million.
  3. 請求項1に記載の調整剤を用いる汚泥高度脱水方法であって、
    (1)含水汚泥に半成コークスを添加して、半成コークスの投与量が含水汚泥の重量の2%〜4%であり、均一に撹拌して、次に、ポリアクリルアミドを添加し、均一に撹拌し、ポリアクリルアミドの投与量が含水汚泥の重量の0.0001%〜0.0004%である汚泥調質ステップと、
    (2)ステップ(1)における調質し終わった汚泥が沈殿タンクで15−20min静置し、次に、沈殿タンクの底部から濃縮汚泥を抽出し、フィルタプレスに導入して加圧ろ過して脱水させ、0.8−3MPaの圧力の下で20〜40min保持し、圧力の保持を完成した後、圧力をリリーフして材料を排出する脱水ステップと、を含むことを特徴とする汚泥高度脱水方法。
    An advanced sludge dewatering method using the regulator according to claim 1,
    (1) The semi-coke is added to the water-containing sludge, the dose of the semi-coke is 2% to 4% of the weight of the water-containing sludge, and the mixture is stirred uniformly, and then the polyacrylamide is added. Sludge tempering step, wherein the polyacrylamide dosage is 0.0001% to 0.0004% of the weight of the water-containing sludge,
    (2) The sludge that has been tempered in step (1) is allowed to stand in the sedimentation tank for 15-20 min, and then the concentrated sludge is extracted from the bottom of the sedimentation tank, introduced into a filter press, and filtered under pressure. Dewatering and holding for 20 to 40 min under a pressure of 0.8-3 MPa, and after completing the pressure holding, a dehydration step of releasing the material by discharging the pressure and dehydrating the sludge. Method.
  4. 前記のフィルタプレスはプレートおよびフレームフィルタプレスであることを特徴とする請求項3に記載の汚泥高度脱水方法。   4. The sludge advanced dewatering method according to claim 3, wherein the filter press is a plate and a frame filter press.
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