1、荷蘭荷豐技術(shù)公司工程部,Your proven partner in technology transfer to China,1,FUNGHAN ENGINEERING,北京豐漢工程技術(shù)有限公司,尿素裝置增產(chǎn)節(jié)能改造Urea Revamp,Urea Revamp,Your proven partner in technology transfer to China,2,尿素生產(chǎn)技術(shù)主要有水溶液全循環(huán)工藝和氨/CO2汽提工藝。該增產(chǎn)節(jié)能改造技術(shù)是在CO2汽提法尿素生產(chǎn)工藝以及大顆粒尿素造粒工藝的基礎(chǔ)上完成的。,Urea production technology is mainly about

2、 full circulation of the aqueous solution process and ammonia/CO2 stripping process. Our revamp technology is mainly applied to the CO2 stripping urea production technology and green granulation technology.,Urea Revamp,Your proven partner in technology transfer to China,3,CO2汽提法尿素合成工藝改造 Urea Synthes

3、is Revamp for CO2 Stripping Process,Your proven partner in technology transfer to China,4,蒸發(fā)真空冷凝段,廢水處理段,合成塔 HP synthetic tower,高壓洗滌器 HP Scrubber,高壓冷凝器 HP Carbamate Condenser,脫氫反應(yīng)器 Dehydrogenation reactor,CO2壓縮機(jī) CO2 Compressor,汽提塔,一段蒸發(fā)器 Evaporation,高壓甲銨泵 HP Carbamate Pump,氨泵 Ammonia Pump,低壓吸收塔 LP Abs

4、orber,精餾塔 Rectify,蒸發(fā)段,低壓段,高壓段,熔融尿素去,造粒裝置,HP synthesis stage,LP stage,Evaporation stage,CO2汽提工藝流程示意簡(jiǎn)圖CO2 stripping process flow scheme,CO2 Stripper,Melting urea to granulation,裝置的特點(diǎn)plant features,Your proven partner in technology transfer to China,5,1. 高壓氨泵和CO2壓縮系統(tǒng)都有備機(jī)，可以滿足擴(kuò)產(chǎn)的需要。 Both high ammonia pu

5、mps and CO2 compressor system have been prepared to meet expansion requirements. 2. 高壓循環(huán)系統(tǒng)設(shè)備成為瓶頸。增加該部分設(shè)備投資大。 In the expansion process, equipments in the high pressure stage is to be the bottleneck, which will cause a great investment if increase.,需要改造的裝置一般都具有以下特點(diǎn)： Generally, the plant has the follow

6、ing features.,豐漢工程建議方案 Funghan proposal,Your proven partner in technology transfer to China,6,豐漢工程公司建議 使用增加中壓分解段的方式完成擴(kuò)產(chǎn)改造的目的,Funghan propose to add a MP stage to complete expansion.,豐漢工程建議方案 Funghan proposal,Your proven partner in technology transfer to China,7,尿素合成段增產(chǎn)改造的基本原則 Basic principles for ur

7、ea synthesis section revamp,盡量少動(dòng)或不動(dòng)高壓段 as little as possible, even not revamp high pressure synthesis section 改造后原裝置仍可獨(dú)立運(yùn)行 original plant can still operation independently after revamp 盡可能的減少投資 as much as possible to reduce investment 4. 節(jié)能降耗及減排 save energy and reduce emission,豐漢工程建議方案Funghan propos

8、al,Your proven partner in technology transfer to China,8,增加中壓分解段的技術(shù)背景 technical background of MP stage,最早水溶液全循環(huán)技術(shù)即有中壓段 initial full circulation of the aqueous solution process technology has a MP stage CO2汽提引進(jìn)中國(guó)后，有多種方案改進(jìn)系統(tǒng)，增加中壓段來(lái)增產(chǎn)改造是其中的一種方案 When ammonia stripping technology was introduced in to Chi

9、na, there are many proposals to improve the system, adding a MP stage to increase production is one of proposals.,豐漢工程建議方案Funghan proposal,Your proven partner in technology transfer to China,9,增加中壓分解段的技術(shù)背景 technical background of MP stage,3. 豐漢工程公司多年前即開始開發(fā)該技術(shù) Funghan Engineering company began develo

10、ping this technology many years ago. 4. 在國(guó)內(nèi)的改造中使用了該方案 In China, this proposal has been used in the revamp of some urea plant.,豐漢工程建議方案 Funghan proposal,Your proven partner in technology transfer to China,10,增加中壓段流程示意圖 PFS for adding MP stage,蒸發(fā)真空冷凝段,廢水處理段,汽提塔,蒸發(fā)段,低壓段,高壓段,熔融尿素去,造粒裝置,HP synthesis stag

11、e,LP stage,Evaporation stage,合成塔 HP synthetic tower,高壓洗滌器 HP Scrubber,高壓冷凝器 HP Carbamate Condenser,脫氫反應(yīng)器 Dehydrogenation reactor,CO2壓縮機(jī) CO2 Compressor,一段蒸發(fā)器 Evaporation,高壓甲銨泵 HP Carbamate Pump,氨泵 Ammonia Pump,低壓吸收塔 LP Absorber,精餾塔 Rectify,CO2 Stripper,Melting urea to granulation,豐漢工程建議方案Funghan prop

12、osal,Your proven partner in technology transfer to China,11,蒸發(fā)真空冷凝段,廢水處理段,中壓,甲銨,冷凝器 MPCC,中壓分離器 MP Separator,汽提塔,低壓甲銨泵 LP Carbamate pump,中壓汽提塔 MP Stripper,蒸發(fā)段,低壓段,中壓段,高壓段,熔融尿素去,造粒裝置,HP synthesis stage,MP stage,LP stage,Evaporation stage,增加中壓段流程示意圖PFS for adding MP stage,高壓洗滌器 HP Scrubber,高壓冷凝器 HP Car

13、bamate Condenser,脫氫反應(yīng)器 Dehydrogenation reactor,CO2壓縮機(jī) CO2 Compressor,一段蒸發(fā)器 Evaporation,高壓甲銨泵 HP Carbamate Pump,氨泵 Ammonia Pump,低壓吸收塔 LP Absorber,精餾塔 Rectify,CO2 Stripper,Melting urea to granulation,合成塔 HP synthetic tower,豐漢工程建議方案Funghan proposal,Your proven partner in technology transfer to China,12

14、,增加中壓分解段的工藝流程概述 PFS description of MP stage,從高壓合成塔出來(lái)的尿素溶液經(jīng)過(guò)絕壓約20bar的閃蒸后，一部分被送入中壓分離加熱器中。在分離器中，在用于分離的9至12bar壓力的高壓蒸汽作用下，尿素/水溶液從大量未轉(zhuǎn)化的氨和二氧化碳中被分離出來(lái)。中壓分離器的分離段包含一個(gè)填料床層，以便在使用汽提加熱器部分出來(lái)的廢蒸汽閃蒸后，進(jìn)一步精餾液體。該床層有利于降低加熱器的高壓蒸汽損耗。 Urea solution leaving the high-pressure autoclave is partly sent to the medium-pressure d

15、issociation heater after being flashed at a pressure of about 20 bar absolute. In the dissociator the urea/ water solution is separated from the bulk of non-converted ammonia and carbon dioxide by using reduced high-pressure steam at a pressure of 9 to 12 bar for the dissociation. The separator of t

16、he medium-pressure dissociator contains a packed bed in order to rectify the liquid after flashing by using the off-vapor leaving the heater part for stripping. This bed has a positive effect on the high-pressure steam consumption of heater.,豐漢工程建議方案Funghan proposal,Your proven partner in technology

17、 transfer to China,13,增加中壓分解段的工藝流程概述 PFS description of MP stage,來(lái)自中壓分離加熱器中的尿素溶液，溫度要控制在160 至165C，并被引到一臺(tái)中壓汽提塔中。為了把甲銨生成的N/C摩爾比控制在約2.3mol/mol的數(shù)值上，需要向這個(gè)中壓段加入二氧化碳。在這臺(tái)中壓汽提塔中，這些二氧化碳用作汽提劑，以降低從中壓汽提塔進(jìn)入現(xiàn)有低壓循環(huán)段的被汽提尿液的N/C摩爾比。 The urea solution leaving the medium-pressure dissociation heater is controlled at a te

18、mperature of 160 to 165 C and discharged to a medium-pressure stripper. Carbon dioxide is added to this medium-pressure section in order to control the N/C molar ratio of the formed carbamate at a value of about 2.3 mol/mol. In the medium-pressure stripper this carbon dioxide is being used as a stri

19、pping agent to decrease the N/C molar ratio of the stripped urea solution leaving MP stripper to existing low-pressure recirculation section.,豐漢工程建議方案Funghan proposal,Your proven partner in technology transfer to China,14,增加中壓分解段的工藝流程概述 PFS description of MP stage,來(lái)自中壓分解分離器和中壓汽提塔的氣體，與在現(xiàn)有低壓循環(huán)段生成的甲銨一起

20、，被送到一臺(tái)浸沒式的中壓甲銨冷凝器中。在這臺(tái)浸沒式冷凝器中，氣體被最大程度的冷凝。放出的冷凝熱由一個(gè)冷卻水調(diào)節(jié)系統(tǒng)吸收。 The vapor leaving the medium-pressure dissociation separator and the medium-pressure stripper are sent together with the carbamate formed in the existing low-pressure recirculation section to a submerged medium-pressure carbamate condenser

21、. In this submerged condenser the vapors are condensed at a maximum. The released condensation heat is dissipated in a tempered cooling water system.,豐漢工程建議方案Funghan proposal,Your proven partner in technology transfer to China,15,增加中壓分解段的工藝流程概述 PFS description of MP stage,含水約20%（重量比）溫度控制在約105C的的中壓甲銨

22、，將被現(xiàn)有的高壓甲銨泵送到合成段，該甲銨泵分別通向高壓洗滌器和高壓甲銨冷凝器。 The medium-pressure carbamate, containing about 20 wt % water will be controlled at a temperature of about 105 C. This carbamate is sent to synthesis section via the existing high-pressure carbamate pumps, where it is split to the high-pressure scrubber and to

23、 the high-pressure carbamate condenser.,豐漢工程建議方案Funghan proposal,Your proven partner in technology transfer to China,16,增加中壓分解段的工藝流程概述 PFS description of MP stage,來(lái)自中壓再冷凝器的、含有未轉(zhuǎn)化氨和二氧化碳的惰性氣體，被引入現(xiàn)有的4bar吸收塔和/或現(xiàn)有的低壓循環(huán)段中的低壓甲銨冷凝器中。 The inert, containing non-condensed ammonia and carbon dioxide, leaving th

24、e medium-pressure after condenser is discharged to the existing 4 bar absorber and/or to the low-pressure carbamate condenser in the existing low-pressure recirculation section.,豐漢工程建議方案 Funghan proposal,Your proven partner in technology transfer to China,17,新增的設(shè)備表 New Equipment List,大顆粒造粒部分改造 Revam

25、p for Granulation,Your proven partner in technology transfer to China,18,大顆粒造粒部分改造 Revamp for Green Granulation Process,裝置的特點(diǎn)plant features,Your proven partner in technology transfer to China,19,1. 造粒機(jī)的造粒能力成為增產(chǎn)的一大瓶頸。 The capacity of granulator will be a bit problem for the expansion revamp. 2. 產(chǎn)量增加后

26、沒有足夠的冷卻系統(tǒng)降溫，使產(chǎn)品溫度過(guò)高。 There is no enough cooler system to cool down the products.,需要改造的裝置一般都具有以下特點(diǎn)： Generally, the plant has the following features.,豐漢工程建議方案Funghan proposal,Your proven partner in technology transfer to China,20,豐漢工程建議方案Funghan proposal,Your proven partner in technology transfer to C

27、hina,21,增加造粒噴頭，以滿足增產(chǎn)的需要。 Add new granulation sprayer to meet the capacity requirement. 增加新冷卻器，以彌補(bǔ)冷卻系統(tǒng)的不足。 Add new cooler to compensate for cooling system capacity. 同時(shí)，為新增冷卻器配備尾氣洗滌系統(tǒng)及風(fēng)機(jī)，不影響原洗滌系統(tǒng)的運(yùn)行。 At the same time, we will add new scrubber system for the new cooler. 視設(shè)備能力情況，增加/改造斗提、篩分系統(tǒng). Considerin

28、g the equipment capacity to add or revamp elevator and screen.,豐漢工程建議方案 Funghan proposal,Your proven partner in technology transfer to China,22,新增/改造的設(shè)備表 New/Modify Equipment List,改造實(shí)例介紹 revamp practice introduction,Your proven partner in technology transfer to China,23,尿素裝置改造實(shí)例介紹 Revamp practice in

29、troduction of Urea plant.,改造實(shí)例介紹 revamp practice introduction,Your proven partner in technology transfer to China,24,裝置改造前設(shè)計(jì)能力1000噸/天（年產(chǎn)30萬(wàn)噸) Design capacity is 1000mtpd (annual output of 300,000 tons), before revamp,2. 裝置改造后狀況 Plant situation after revamp,改造實(shí)例介紹 revamp practice introduction,Your proven partner in technology transfer to China,25,中壓甲銨冷凝器 MP Carbamate Condenser,改造實(shí)例介紹 revamp practice introduction,Your proven partner in technology tr