CN103470322A - Formaldehyde process device capable of comprehensively recycling heat energy of byproduct steam - Google Patents
Formaldehyde process device capable of comprehensively recycling heat energy of byproduct steam Download PDFInfo
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- CN103470322A CN103470322A CN2013103653931A CN201310365393A CN103470322A CN 103470322 A CN103470322 A CN 103470322A CN 2013103653931 A CN2013103653931 A CN 2013103653931A CN 201310365393 A CN201310365393 A CN 201310365393A CN 103470322 A CN103470322 A CN 103470322A
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Abstract
The invention discloses a formaldehyde process device capable of comprehensively recycling heat energy of byproduct steam. The formaldehyde process device comprises a tail gas treatment device and an oxidation device, wherein the tail gas treatment device is used for treating the byproduct steam with 0.8MPa, and the oxidation device is used for treating the byproduct steam with 0.4MPa. The formaldehyde process device utilizes a steam turbine unit to effectively recover the heat enthalpy difference between saturated steams with different pressures. The formaldehyde process device aims at fully utilizing the enthalpy value difference of the byproduct steam with different pressure grades so as to convert the low-grade steam into high-quality electric energy, thus improving the utilization rate of energy, and belonging to the optimized application of energy; the formaldehyde process device fully utilizes the byproduct steam with lower pressure, thus effectively reducing the steam waste.
Description
Technical field
The invention belongs to Chemical Manufacture Processes and apparatus technical field, relate generally to each link byproduct steam heat energy comprehensive recycling device in formaldehyde production technology.
Background technique
Domestic current Formaldehyde Production enterprise has surpassed 5000, and aggregated capacity is about 3,200 ten thousand tons.Because the formaldehyde process engineering is updated, formaldehyde develops into " aerogenesis type " by former " consumption vapour type ", be that formaldehyde plant all can be realized byproduct steam, but formaldehyde is still " consumable electrode type " device at present, electricity consumption unit consumption 25 ~ 30KW/h/ 37% formaldehyde products per ton, and the device energy dissipation situation of formaldehyde is very serious.Wherein formaldehyde plant steams a little mainly by two, and one is the thermogenetic 0.4MPa steam of reaction that utilizes oxidator, and the 2nd, utilize the controlled steam of pressure of heat generation of the exhaust combustion of formaldehyde plant, general normal production 0.8MPa.In formaldehyde production, also need to supplement steam in oxidation reactor as reaction feed, requiring the steam entered in reactor in this step is 0.15MPa simultaneously.At present Formaldehyde Production enterprise normally by the steam pressure-reducing of the 0.4MPa steam that produces in the formolite reaction device or 0.8MPa to sending into the reactor steam of being prepared burden after 0.15MPa, cause the high pressure steam energy directly to waste.When steam is decompressed to 0.15MPa by 0.4MPa, the heat content 2748.11kJ/kg of 0.4MPa saturated vapour, and 0.15MPa saturated vapour heat content is 2716.5 kJ/kg, heat energy is wasted in a large number.While is because vapor pressure is lower, but value is lower, so byproduct steam is removed outside the domestic water heating substantially, is all that direct emptying is processed, and not only noise is large, and energy dissipation is very serious, does not meet the expectation that national energy-saving reduces discharging.
Summary of the invention
Goal of the invention: for problem and the defect of above-mentioned existence, the invention provides a kind of formaldehyde tooling of byproduct steam heat energy comprehensive reutilization, can effectively reclaim the heat energy of formaldehyde plant byproduct steam, and this heat energy is converted into to the electric energy of formaldehyde self-demand, and this part electric energy meets formaldehyde plant self consumption demand.
Technological scheme: for achieving the above object, the present invention is by the following technical solutions: a kind of formaldehyde tooling of byproduct steam heat energy comprehensive reutilization, described formaldehyde plant comprises exhaust gas treating device and oxidator, the steam of described exhaust gas treating device by-product 0.5～0.8MPa, the steam of described oxidator by-product 0.3～0.45MPa, described recycle device comprises tail gas drum, oxidator drum, steam turbine unit and condensed water recovering system, and described steam turbine unit comprises and connects successively a level steam turbine, two level steam turbines and heat content heat-exchanger rig; Described tail gas drum, with after the steam (vapor) outlet of exhaust gas treating device is connected, is communicated with a level steam turbine entrance by pipeline; Described oxidator drum, with after the steam (vapor) outlet of oxidator is connected, is communicated with two level steam turbine entrances by pipeline; Described two level steam turbine outlet ports are provided with the steam branch pipe of the saturated vapour of circulation 0.10～0.20MPa, and are communicated with oxidator; Described heat content heat-exchanger rig, with after condensed water recovering system is connected, is connected and carries out moisturizing with the oxidator drum with the tail gas drum respectively by pipeline.
As preferably, described condensed water recovering system is vapor-liquid separator.
As preferably, described heat content heat-exchanger rig is condensation heat exchange device.
As preferably, described steam turbine unit outside electric power network.
Beneficial effect: compared with prior art, the present invention has the following advantages: it is poor that the present invention is intended to take full advantage of the enthalpy of different pressures grade steam of formaldehyde plant by-product, be high-quality electric energy by low-grade steam-reforming, promoted the utilization ratio of energy, belong to the optimization application of energy; Take full advantage of the byproduct steam that pressure is lower, can effectively reduce the waste of steam, realized the purpose without the energy-saving and emission-reduction of externally fed air feed.
The accompanying drawing explanation
The structural representation of the formaldehyde tooling that Fig. 1 is byproduct steam heat energy comprehensive reutilization of the present invention.
Wherein, tail gas drum 1, oxidator drum 2, steam turbine unit 3, a level steam turbine 31, two level steam turbines 32, heat content heat-exchanger rig 33, condensed water recovering system 4, arm 5.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiments only is not used in and limits the scope of the invention for the present invention is described, after having read the present invention, those skilled in the art all fall within the application's claims limited range to the modification of the various equivalent form of values of the present invention.
As shown in Figure 1, the formaldehyde tooling of byproduct steam heat energy comprehensive reutilization of the present invention, tail gas drum and oxidator drum receive respectively exhaust gas treating device and the 0.8MPa of oxidator generation and the byproduct steam of 0.4MPa in formaldehyde production technology.After wherein the byproduct steam of 0.8MPa enters a level steam turbine in the steam turbine unit and generated electricity, then enter two level steam turbines and further generate electricity.Now the byproduct steam of 0.4MPa enters as a supplement by two level steam turbine entrances, continue generating, finally by the heat content heat-exchanger rig, forming steam condensate flows out from the outlet of steam turbine unit, and pass through condensed water recovering system, circulation is carried out moisturizing to tail gas drum and oxidator drum, avoids producing in addition softened water and carries out moisturizing.Meanwhile, two level steam turbine outlet ports arrange saturated vapour that arm extracts a part of 0.15MPa out as formaldehyde production technology in the batching steam of oxidator use, reduce discharge when further effectively utilizing heat energy, avoid again producing softened water steam as batching steam simultaneously.
Therefore due to the formaldehyde plant byproduct steam, the generating of substantially all condensing, utilize the generating of all condensing of this equipment, the steam of formaldehyde plant, and generated energy can meet the normal production requirement of formaldehyde plant.This invention has solved a large amount of wastes that the formaldehyde producer steam without steam demand effluxes, the call that simultaneously utilizes this device can the active response national energy-saving to reduce discharging, and create very obvious economic benefits for enterprise.Technique of the present invention mainly solves the steam utilization problem that adds formaldehyde plant, except formaldehyde plant itself needs steam, the different size steam that formaldehyde plant exhaust gas processing device and oxidator treatment device produce, outside personal batching steam and heating steam, the generating of all condensing of other steam.The solidifying gas formula generating of formaldehyde plant, can accomplish that the enough formaldehyde plants of generated energy self are used outer the confession.Fact proved: 120,000 tons of formaldehyde plants, byproduct steam 5.5t, after this screw rod generating, year generating 3,960,000 degree, and outlet steam is water of condensation, after gas-liquid separator, the saturated vapour water of condensation is as the water supply of drum.And the electricity produced by low-pressure saturated steam, be connected with bus by grid-connected contact cabinet in switchgear room, thereby realize that generating and system are incorporated into the power networks.
Claims (4)
1. the formaldehyde tooling of a byproduct steam heat energy comprehensive reutilization, comprise exhaust gas treating device and oxidator, the steam of described exhaust gas treating device by-product 0.5～0.8MPa, the steam of described oxidator by-product 0.3～0.45MPa, it is characterized in that: described recycle device comprises tail gas drum, oxidator drum, steam turbine unit and condensed water recovering system, and described steam turbine unit comprises and connects successively a level steam turbine, two level steam turbines and heat content heat-exchanger rig; Described tail gas drum, with after the steam (vapor) outlet of exhaust gas treating device is connected, is communicated with a level steam turbine entrance by pipeline; Described oxidator drum, with after the steam (vapor) outlet of oxidator is connected, is communicated with two level steam turbine entrances by pipeline; Described two level steam turbine outlet ports are provided with the steam branch pipe of the saturated vapour of circulation 0.10～0.20MPa, and are communicated with oxidator; Described heat content heat-exchanger rig, with after condensed water recovering system is connected, is connected and carries out moisturizing with the oxidator drum with the tail gas drum respectively by pipeline.
2. the formaldehyde tooling of byproduct steam heat energy comprehensive reutilization according to claim 1, it is characterized in that: described condensed water recovering system is vapor-liquid separator.
3. the formaldehyde tooling of byproduct steam heat energy comprehensive reutilization according to claim 2, it is characterized in that: described heat content heat-exchanger rig is condensation heat exchange device.
4. the formaldehyde tooling of byproduct steam heat energy comprehensive reutilization according to claim 3, is characterized in that: described steam turbine unit outside electric power network.
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| CN2013103653931A CN103470322A (en) | 2013-08-21 | 2013-08-21 | Formaldehyde process device capable of comprehensively recycling heat energy of byproduct steam |
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| CN2013103653931A CN103470322A (en) | 2013-08-21 | 2013-08-21 | Formaldehyde process device capable of comprehensively recycling heat energy of byproduct steam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763486A (en) * | 2015-03-24 | 2015-07-08 | 江苏凯茂石化科技有限公司 | Formaldehyde waste heat power generation method and generator set thereof |
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| EP0122806A2 (en) * | 1983-04-19 | 1984-10-24 | Air Products And Chemicals, Inc. | Method and apparatus for generating power and low pressure saturated or near saturated steam |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104763486A (en) * | 2015-03-24 | 2015-07-08 | 江苏凯茂石化科技有限公司 | Formaldehyde waste heat power generation method and generator set thereof |
| CN104763486B (en) * | 2015-03-24 | 2016-04-13 | 江苏凯茂石化科技有限公司 | Formaldehyde method for power generation by waste heat and generator set thereof |
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Address after: 214215 Jiangsu province Binhu District of Wuxi City Xiu Xi Lu Henghua Technology Park No. 58 Building No. 50 Applicant after: Jiangsu Kaimao Chemical Technology Co., Ltd. Address before: Xuelang Binhu District 214000 Jiangsu province Wuxi city received Ge Dai community Applicant before: Jiangsu Kaimao Chemical Technology Co., Ltd. |
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Inventor after: Xiang Jiayong Inventor after: Guo Bing Inventor after: Yang Keqi Inventor before: Xiang Jiayong Inventor before: Guo Bing Inventor before: Yang Keqi |
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Application publication date: 20131225 |