TWI486203B - Method for extending the operating cycle of hydrogen sulfide scrubber in coke oven - Google Patents
Method for extending the operating cycle of hydrogen sulfide scrubber in coke oven Download PDFInfo
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本發明是有關於一種延長洗滌塔操作週期之方法，特別是指一種延長煉焦爐氣硫化氫洗滌塔操作週期之方法。The present invention relates to a method for extending the operating cycle of a scrubber, and more particularly to a method for extending the operating cycle of a hydrogen sulfide scrubber of a coke oven gas.
煉焦爐氣(Coke Oven Gas，COG)為煉焦工業產生的副產品，亦為一貫作業鋼廠之重要自產燃氣，由於其組成富含可燃氣體，可直接當作燃料使用，極具有經濟價值，因此，煉焦爐氣便成為煉鋼業非常重要的能量來源。Coke Oven Gas (COG) is a by-product of the coking industry. It is also an important self-produced gas for steel mills. Because its composition is rich in combustible gas, it can be directly used as fuel, which is of great economic value. Therefore, coke oven gas has become a very important source of energy for the steel industry.
煉焦爐氣的組成相當複雜，包含有硫化氫、氰酸、二氧化碳、氨、萘等，其中硫化氫、氰酸、二氧化碳為酸性成分，而氨為鹼性成分，這些成分不但為腐蝕因子，且燃燒後會產生硫氧化物與氮氧化物，因此，煉焦爐氣中需要淨化去除硫化氫與氰酸等酸性成分，以及氨等鹼性成份。The composition of the coke oven gas is quite complicated, including hydrogen sulfide, cyanic acid, carbon dioxide, ammonia, naphthalene, etc., wherein hydrogen sulfide, cyanic acid, carbon dioxide are acidic components, and ammonia is an alkaline component, which is not only a corrosion factor, but also After combustion, sulfur oxides and nitrogen oxides are generated. Therefore, in the coke oven gas, it is necessary to purify and remove acidic components such as hydrogen sulfide and cyanic acid, and alkaline components such as ammonia.
一般而言，煉焦爐氣可利用洗滌塔並搭配適當的洗滌液，以去除前述煉焦爐氣中所欲去除的目標物，例如以鹼性洗滌液去除硫化氫與氰酸等酸性氣體，而以酸性洗滌液去除氨等鹼性成份。但是由於煉焦爐氣的萘，並無 法利用酸或鹼性洗滌液去除，且在低溫的條件下也容易從煉焦爐氣中析出，因此，在洗滌的過程中，存在於煉焦爐氣中的萘會附著於洗滌塔中，造成洗滌塔的壓差越來越高，而影響洗滌效率，故每隔一段時間，當壓差超過操作上限時，洗滌塔便需要進行隔離，進行熱融洗滌以去除附著於洗滌塔中的萘。In general, the coke oven gas can utilize a washing tower and a suitable washing liquid to remove the target object to be removed in the coke oven gas, for example, an alkaline washing liquid to remove acid gases such as hydrogen sulfide and cyanic acid. The acidic washing liquid removes alkaline components such as ammonia. However, due to the naphthalene of the coke oven gas, there is no The method is removed by an acid or alkaline washing liquid, and is also easily precipitated from the coke oven gas under low temperature conditions. Therefore, during the washing process, the naphthalene present in the coke oven gas adheres to the washing tower, causing washing. The pressure difference of the tower is getting higher and higher, which affects the washing efficiency. Therefore, at intervals, when the pressure difference exceeds the upper limit of the operation, the washing tower needs to be isolated and subjected to hot-melt washing to remove the naphthalene attached to the washing tower.
在熱融洗滌的過程中，洗滌塔無法使用，故需準備額外的洗滌塔供操作使用，不但會使得投資的成本增加，且過於密集的熱融洗滌過程，其所需投入的人力及材料成本也是一大成本支出。In the process of hot melt washing, the washing tower can not be used, so it is necessary to prepare an additional washing tower for operation, which not only increases the cost of investment, but also the excessively intensive hot melt washing process, the labor and material cost required. It is also a big cost.
基於上述煉焦爐氣洗滌塔於操作過程中，過於密集進行熱融洗滌而使成本增加的缺點，因此，如何有效地延長煉焦爐氣洗滌塔的操作週期以降低投資成本，係為本發明研究改良的重要目標。Based on the above-mentioned coke oven gas scrubbing tower, the disadvantage of excessively intensive hot-melt washing during the operation process increases the cost. Therefore, how to effectively extend the operation cycle of the coke oven gas scrubbing tower to reduce the investment cost is an improvement of the present invention. The important goal.
因此，本發明之目的，即在提供一種延長煉焦爐氣硫化氫洗滌塔操作週期之方法。Accordingly, it is an object of the present invention to provide a method of extending the operating cycle of a coke oven gas hydrogen sulfide scrubber.
於是，本發明延長煉焦爐氣硫化氫洗滌塔操作週期之方法，包含建立一硫化氫洗滌系統，該硫化氫洗滌系統包括一用以將煉焦爐氣冷卻的初冷塔、一與該初冷塔連通的硫化氫洗滌塔、一與該硫化氫洗滌塔連接並用以提供袪酸洗水的袪酸塔，及一與該硫化氫洗滌塔連接並用以提供濃氨水洗滌液的氨洗滌塔，該煉焦爐氣經該初冷塔冷 卻後進入該硫化氫洗滌塔，並與該袪酸洗水與濃氨水洗滌液進行反應，以去除存在於該煉焦爐氣中的硫化氫，其中，控制該硫化氫洗滌塔之溫度、該袪酸洗水及濃氨水洗滌液的溫度大於該煉焦爐氣於該初冷塔的出口溫度。Thus, the method of the present invention for extending the operating cycle of a coke oven gas hydrogen sulfide scrubber comprises establishing a hydrogen sulfide scrubbing system comprising a primary cooling tower for cooling the coke oven gas, and a primary cooling tower a connected hydrogen sulfide scrubbing tower, a tannic acid column connected to the hydrogen sulfide scrubbing tower for providing a pickling water, and an ammonia scrubbing tower connected to the hydrogen sulfide scrubbing tower for providing concentrated ammonia water washing liquid, the coking unit The furnace gas is cooled by the primary cooling tower And then entering the hydrogen sulfide washing tower, and reacting with the pickling water and the concentrated ammonia washing liquid to remove hydrogen sulfide present in the coke oven gas, wherein the temperature of the hydrogen sulfide washing tower is controlled, the crucible is controlled The temperature of the pickling water and the concentrated ammonia washing liquid is greater than the outlet temperature of the coke oven gas at the primary cooling tower.
較佳地，前述延長煉焦爐氣硫化氫洗滌塔操作週期之方法，其中，該硫化氫洗滌塔之溫度大於該煉焦爐氣於該初冷塔的出口溫度至少2.5℃。Preferably, the method for extending the operation cycle of the coke oven gas hydrogen sulfide scrubbing tower, wherein the temperature of the hydrogen sulfide scrubber is greater than the outlet temperature of the coke oven gas at the outlet tower is at least 2.5 °C.
更佳地，前述延長煉焦爐氣硫化氫洗滌塔操作週期之方法，其中，該硫化氫洗滌塔之溫度大於該煉焦爐氣於該初冷塔的出口溫度2.5℃至6℃。More preferably, the foregoing method for extending the operation cycle of the coke oven gas hydrogen sulfide scrubbing tower, wherein the temperature of the hydrogen sulfide scrubber is greater than the outlet temperature of the coke oven gas from the primary cooling tower by 2.5 ° C to 6 ° C.
較佳地，前述延長煉焦爐氣硫化氫洗滌塔操作週期之方法，其中，該袪酸洗水及濃氨水洗滌液的溫度大於該煉焦爐氣於該初冷塔的出口溫度至少2.5℃。Preferably, the method for extending the operation cycle of the coke oven gas hydrogen sulfide washing tower, wherein the temperature of the sulphuric acid washing water and the concentrated ammonia water washing liquid is greater than the outlet temperature of the coke oven gas at the primary cooling tower is at least 2.5 ° C.
更佳地，前述延長煉焦爐氣硫化氫洗滌塔操作週期之方法，其中，該袪酸洗水及濃氨水洗滌液之溫度大於該煉焦爐氣於該初冷塔的出口溫度2.5℃至6℃。More preferably, the method for extending the operation cycle of the coke oven gas hydrogen sulfide washing tower, wherein the temperature of the sulphuric acid washing water and the concentrated ammonia water washing liquid is greater than the outlet temperature of the coke oven gas at the primary cooling tower of 2.5 ° C to 6 ° C .
較佳地，前述延長煉焦爐氣硫化氫洗滌塔操作週期之方法，還定義一壓差指標值Z，該壓差指標值Z為該硫化氫洗滌塔的總壓力除以該煉焦爐氣進入該硫化氫洗滌塔的流量，且控制該Z值小於該壓差指標值之一預設管制上限Z*。Preferably, the method for extending the operating cycle of the coke oven gas hydrogen sulfide scrubbing tower further defines a differential pressure index value Z, which is the total pressure of the hydrogen sulfide scrubber divided by the coke oven gas entering the The flow rate of the hydrogen sulfide scrubber is controlled, and the Z value is controlled to be less than a preset control upper limit Z* of the differential pressure index value.
更佳地，前述延長煉焦爐氣硫化氫洗滌塔操作週期之方法，其中，該壓差指標值之管制上限Z*為3。More preferably, the method for extending the operation cycle of the coke oven gas hydrogen sulfide washing tower, wherein the control upper limit Z* of the differential pressure index value is 3.
1‧‧‧硫化氫洗滌系統1‧‧‧ Hydrogen Sulfide Washing System
11‧‧‧初冷塔11‧‧‧cold tower
12‧‧‧硫化氫洗滌塔12‧‧‧ Hydrogen Sulfide Washing Tower
13‧‧‧袪酸塔13‧‧‧ citrate tower
14‧‧‧氨洗滌塔14‧‧‧Ammonia scrubber
本發明之其他的特徵及功效，將於參照圖式的實施方式中清楚地呈現，其中：圖1是一示意圖，說明本發明用以將煉焦爐氣的硫化氫移除之硫化氫洗滌系統；圖2是一趨勢圖，說明以習知條件進行操作之硫化氫洗滌塔的壓差趨勢圖；圖3是一趨勢圖，說明本發明該硫化氫洗滌塔、袪酸洗水，及濃氨水的溫度趨勢圖；及圖4是一趨勢圖，說明以習知條件與本發明之方法進行操作之硫化氫洗滌塔的壓差趨勢圖。Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a schematic diagram illustrating a hydrogen sulfide washing system for removing hydrogen sulfide from a coke oven gas of the present invention; 2 is a trend diagram illustrating a pressure difference trend diagram of a hydrogen sulfide scrubbing tower operated under conventional conditions; and FIG. 3 is a trend diagram illustrating the hydrogen sulfide scrubbing tower, the pickling water, and the concentrated ammonia water of the present invention. Temperature Trend Chart; and Figure 4 is a trend diagram illustrating the pressure differential trend plot of a hydrogen sulfide scrubber operating under conventional conditions with the method of the present invention.
在本發明被詳細描述之前，應該注意在以下的說明內容中，類似的元件是以相同的編號來表示。Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.
參閱圖1，本發明延長煉焦爐氣硫化氫洗滌塔操作週期之方法的一較佳實施例包含建立一硫化氫洗滌系統1，該硫化氫洗滌系統1包括一用以將煉焦爐氣冷卻的初冷塔11、一與該初冷塔11連通的硫化氫洗滌塔12、一與該硫化氫洗滌塔12連接並用以提供袪酸洗水的袪酸塔13，及一與該硫化氫洗滌塔12連接並用以提供濃氨水洗滌液的氨洗滌塔14，該煉焦爐氣經該初冷塔11冷卻後進入該硫化氫洗滌塔12，並與該袪酸洗水與濃氨水洗滌液進行反應，以去除存在於該煉焦爐氣中的硫化氫，其中，控制該硫化氫 洗滌塔12之溫度、該袪酸洗水及濃氨水洗滌液的溫度大於該煉焦爐氣於該初冷塔11的出口溫度。Referring to Figure 1, a preferred embodiment of the method of the present invention for extending the operating cycle of a coke oven gas hydrogen sulfide scrubber comprises the establishment of a hydrogen sulfide scrubbing system 1 comprising a primary for cooling the coke oven gas. a cold tower 11, a hydrogen sulfide scrubbing tower 12 connected to the primary cooling tower 11, a tannic acid column 13 connected to the hydrogen sulfide scrubbing tower 12 for providing a pickling water, and a hydrogen sulfide scrubbing tower 12 An ammonia scrubbing tower 14 connected to provide a concentrated ammonia water washing liquid. The coke oven gas is cooled by the primary cooling tower 11 and then enters the hydrogen sulfide scrubbing tower 12, and reacts with the pickling water and the concentrated ammonia water washing liquid to Removing hydrogen sulfide present in the coke oven gas, wherein the hydrogen sulfide is controlled The temperature of the scrubber 12, the temperature of the sulphuric acid wash water and the concentrated ammonia water wash liquid is greater than the outlet temperature of the coke oven gas at the primary cooling tower 11.
詳細的說，煉焦爐氣由煉焦爐產生後，先以初冷塔11中的水進行冷卻，接著將煉焦爐氣由硫化氫洗滌塔12之塔底送入，再將袪酸洗水及濃氨水洗滌液分別送入該硫化氫洗滌塔12與煉焦爐氣接觸，並將煉焦爐氣中之硫化氫與氰酸等酸性物質去除，該煉焦爐氣經由該硫化氫洗滌塔12去除硫化氫之後，由硫化氫洗滌塔12之塔頂離開，進入氨洗滌塔14以去除煉焦爐氣中的氨，最後，再由氨洗滌塔14排出。其中，反應過後的袪酸洗水及濃氨水洗滌液會由硫化氫洗滌塔12的塔底流出，進入袪酸塔13進行處理，而可再進行循環利用。Specifically, after the coke oven gas is generated by the coke oven, it is first cooled by the water in the primary cooling tower 11, and then the coke oven gas is fed from the bottom of the hydrogen sulfide scrubber 12, and then the acid is washed and concentrated. The ammonia water washing liquid is sent to the hydrogen sulfide washing tower 12 to be in contact with the coke oven gas, and the hydrogen sulfide and the acid substance such as cyanic acid in the coke oven gas are removed, and the coke oven gas is removed by the hydrogen sulfide washing tower 12 to remove hydrogen sulfide. It exits from the top of the hydrogen sulfide scrubber 12, enters the ammonia scrubber 14 to remove ammonia from the coke oven gas, and finally, is discharged from the ammonia scrubber 14. Among them, the decanoic acid washing water and the concentrated ammonia water washing liquid after the reaction will flow out from the bottom of the hydrogen sulfide washing tower 12, enter the tannic acid column 13 for treatment, and can be recycled.
參閱圖2與圖3，圖2為以習知條件進行操作並連續觀察59天之硫化氫洗滌塔12的壓差趨勢圖，習知該硫化氫洗滌塔12進行熱融洗滌以去除附著於該硫化氫洗滌塔12中的萘，主要是藉由觀察該硫化氫洗滌塔12的壓差作為依據，由圖2所示，當壓差超過上限值500mmH2 O時，便需進行硫化氫洗滌塔12的熱融洗滌。Referring to FIG. 2 and FIG. 3, FIG. 2 is a pressure difference trend diagram of the hydrogen sulfide scrubber 12 operating under conventional conditions and continuously observed for 59 days. It is known that the hydrogen sulfide scrubber 12 is subjected to hot melt washing to remove the adhesion thereto. The naphthalene in the hydrogen sulfide scrubber 12 is mainly based on observing the pressure difference of the hydrogen sulfide scrubber 12, and as shown in Fig. 2, when the pressure difference exceeds the upper limit of 500 mmH 2 O, hydrogen sulfide washing is required. The hot melt washing of the tower 12.
然而，要進行熱融洗滌主要是因為萘的堆積，所以要延長操作週期主要是在於減少萘的堆積，由於萘容易在低溫的條件下析出，因此本發明該延長煉焦爐氣硫化氫洗滌塔操作週期之方法主要是藉由控制該硫化氫洗滌塔12之溫度、該袪酸洗水及濃氨水洗滌液的溫度(見圖3)大於 該煉焦爐氣於該初冷塔11的出口溫度至少2.5℃，以減少萘因為該煉焦爐氣自初冷塔11進入該硫化氫洗滌塔12時，因為溫度降低而析出堆積於該硫化氫洗滌塔12，而能有效地延長使用週期；較佳地，該硫化氫洗滌塔12的溫度及該袪酸洗水與濃氨水洗滌液的溫度大於該煉焦爐氣於該初冷塔11的出口溫度2.5℃至6℃，利用該些溫度的控制以減少萘的析出，而可有效地延長該硫化氫洗滌塔12的操作週期，上述該些溫度不宜過高，否則將造成能源的浪費。However, the hot melt washing is mainly due to the accumulation of naphthalene, so the operation cycle is mainly to reduce the accumulation of naphthalene, and since the naphthalene is easily precipitated under low temperature conditions, the operation of the coke oven gas hydrogen sulfide washing tower of the present invention is extended. The method of the cycle is mainly by controlling the temperature of the hydrogen sulfide scrubber 12, the temperature of the pickling water and the concentrated ammonia washing liquid (see FIG. 3) is greater than The coke oven gas is at least 2.5 ° C at the outlet temperature of the primary cooling tower 11 to reduce naphthalene. Since the coke oven gas enters the hydrogen sulfide scrubbing tower 12 from the primary cooling tower 11 , it is precipitated and deposited in the hydrogen sulfide washing because of a decrease in temperature. The tower 12 can effectively extend the service life; preferably, the temperature of the hydrogen sulfide scrubber 12 and the temperature of the sulphuric acid washing water and the concentrated ammonia water washing liquid are greater than the outlet temperature of the coke oven gas at the primary cooling tower 11 2.5 ° C to 6 ° C, the use of these temperature control to reduce the precipitation of naphthalene, and can effectively extend the operating cycle of the hydrogen sulfide scrubber 12, the above temperatures should not be too high, otherwise it will cause energy waste.
此外，由於影響該硫化氫洗滌塔12壓差的原因有很多，例如袪酸洗水的流量與溫度、濃氨水洗滌液的流量與溫度、煉焦爐氣的流量與溫度等，均會影響硫化氫洗滌塔12的壓差，而習知僅藉由觀察硫化氫洗滌塔12的壓差變化進行硫化氫洗滌塔的熱融洗滌，並無法達成該硫化氫洗滌塔12使用的最大效益。然而，由於壓差的增加量會隨著煉焦爐氣的流量大小而變化，因此，本發明該延長煉焦爐氣硫化氫洗滌塔操作週期之方法還定義一壓差指標值Z，該壓差指標值Z為該硫化氫洗滌塔12的總壓力除以該煉焦爐氣進入該硫化氫洗滌塔12的流量，並定義一個預設管制上限Z*，由於該壓差指標值Z為同時考量該硫化氫洗滌塔12的壓力及煉焦爐氣的流量，因此，藉由該壓差指標值Z可更精確的觀測該硫化氫洗滌塔12內部的萘堆積情形，而進一步控制該Z值小於該壓差指標值之一預設管制上限Z*，則可有效地管控該硫化氫洗滌塔12的熱融洗滌週 期，較佳地，該壓差指標值之管制上限Z*為3。In addition, there are many reasons for affecting the pressure difference of the hydrogen sulfide scrubber 12, for example, the flow rate and temperature of the pickling water, the flow rate and temperature of the concentrated ammonia washing liquid, the flow rate and temperature of the coke oven gas, etc., all affect hydrogen sulfide. The pressure difference of the scrubber 12 is maintained, and it is known that the hot melt washing of the hydrogen sulfide scrubber is performed only by observing the change in the pressure difference of the hydrogen sulfide scrubber 12, and the maximum benefit of the use of the hydrogen sulfide scrubber 12 cannot be achieved. However, since the increase of the pressure difference varies with the flow rate of the coke oven gas, the method for extending the operation cycle of the hydrogen sulfide scrubber of the coke oven gas of the present invention further defines a differential pressure index value Z, which is an indicator of the differential pressure. The value Z is the total pressure of the hydrogen sulfide scrubber 12 divided by the flow rate of the coke oven gas into the hydrogen sulfide scrubber 12, and defines a preset regulatory upper limit Z*, since the differential pressure index value Z is simultaneously considered for the vulcanization. The pressure of the hydrogen scrubber 12 and the flow rate of the coke oven gas, therefore, the pressure difference index value Z can more accurately observe the naphthalene accumulation inside the hydrogen sulfide scrubber 12, and further control the Z value to be smaller than the pressure difference. One of the index values presets the upper limit of control Z*, which effectively controls the hot melt washing week of the hydrogen sulfide scrubber 12 Preferably, the control upper limit Z* of the differential pressure index value is 3.
參閱圖4，圖4為習知之操作條件與本發明該延長煉焦爐氣硫化氫洗滌塔操作週期之方法的硫化氫洗滌塔壓差趨勢圖，可知於改善前、後，該硫化氫洗滌塔12的操作週期可由15天至23天延長至32天至40天，而有效地延長該硫化氫洗滌塔的操作週期達50%以上。Referring to FIG. 4, FIG. 4 is a trend diagram of a pressure difference of a hydrogen sulfide washing tower of the conventional operating conditions and the method for extending the operating cycle of the coke oven gas hydrogen sulfide washing tower of the present invention. It can be seen that the hydrogen sulfide scrubbing tower 12 before and after the improvement. The operation cycle can be extended from 15 days to 23 days to 32 days to 40 days, and the operation cycle of the hydrogen sulfide scrubber is effectively extended by more than 50%.
本發明利用控制該硫化氫洗滌塔12及袪酸洗水與濃氨水洗滌液的溫度，以及控制煉焦爐氣進入該硫化氫洗滌塔12的流量而進行Z值的監控，便可在不需額外增加成本的條件下，延長該硫化氫洗滌塔12的操作週期。The invention utilizes the control of the temperature of the hydrogen sulfide scrubber 12 and the sulphuric acid washing water and the concentrated ammonia water washing liquid, and controls the flow rate of the coke oven gas into the hydrogen sulfide washing tower 12 to monitor the Z value, so that no additional The operating cycle of the hydrogen sulfide scrubber 12 is extended under increased cost conditions.
綜上所述，本發明該延長煉焦爐氣硫化氫洗滌塔操作週期之方法，利用該等操作條件的控制，即可有效地延長該硫化氫洗滌塔12的操作週期，不僅不需再額外增加投資的成本，由於不需頻繁的進行熱融洗滌，也可有效地減少人力及材料成本，故確實能達成本發明之目的。In summary, the method for extending the operation cycle of the coke oven gas hydrogen sulfide washing tower of the present invention can effectively extend the operation cycle of the hydrogen sulfide scrubber 12 by using the control of the operating conditions, without further increase The cost of the investment can effectively achieve the object of the present invention because it does not require frequent hot melt washing and can effectively reduce labor and material costs.
惟以上所述者，僅為本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及專利說明書內容所作之簡單的等效變化與修飾，皆仍屬本發明專利涵蓋之範圍內。The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.
1‧‧‧硫化氫洗滌系統1‧‧‧ Hydrogen Sulfide Washing System
11‧‧‧初冷塔11‧‧‧cold tower
12‧‧‧硫化氫洗滌塔12‧‧‧ Hydrogen Sulfide Washing Tower
13‧‧‧袪酸塔13‧‧‧ citrate tower
14‧‧‧氨洗滌塔14‧‧‧Ammonia scrubber
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102517096A (en) * | 2011-12-02 | 2012-06-27 | 大连化工研究设计院 | YST desulphurization and decyanation, and salt extraction method of coke-oven gas |
| CN102642810A (en) * | 2011-02-22 | 2012-08-22 | 上海寰球石油化学工程有限公司 | Combined process for preparing Fischer-Tropsch synthetic oil raw material gas by utilizing coke-oven gas |
| CN103343022A (en) * | 2013-07-26 | 2013-10-09 | 济南冶金化工设备有限公司 | Negative-pressure desulfurization technology and equipment for coke gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102642810A (en) * | 2011-02-22 | 2012-08-22 | 上海寰球石油化学工程有限公司 | Combined process for preparing Fischer-Tropsch synthetic oil raw material gas by utilizing coke-oven gas |
| CN102517096A (en) * | 2011-12-02 | 2012-06-27 | 大连化工研究设计院 | YST desulphurization and decyanation, and salt extraction method of coke-oven gas |
| CN103343022A (en) * | 2013-07-26 | 2013-10-09 | 济南冶金化工设备有限公司 | Negative-pressure desulfurization technology and equipment for coke gas |
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