CN203307047U - System for treating surplus hydrogen in paper mill - Google Patents
System for treating surplus hydrogen in paper mill Download PDFInfo
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- CN203307047U CN203307047U CN2013202941087U CN201320294108U CN203307047U CN 203307047 U CN203307047 U CN 203307047U CN 2013202941087 U CN2013202941087 U CN 2013202941087U CN 201320294108 U CN201320294108 U CN 201320294108U CN 203307047 U CN203307047 U CN 203307047U
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Abstract
The utility model discloses a system for treating surplus hydrogen in a paper mill. The system comprises a water scrubber, an alkaline tower, a carbon filter, a hydrogen compressor, a cooler, a gas-liquid separator, a heater and a lime kiln which are sequentially connected. The system has the advantages that surplus hydrogen collected from workshops of the paper mill is thoroughly purified by the water scrubber, the alkaline tower, the carbon filter, the hydrogen compressor, the cooler, the gas-liquid separator and the heater, and purified hydrogen is conveyed to the lime kiln to be recycled, and the whole treating process is safe without causing accidents due to explosion, leakage and combustion in unforeseen circumstances. The system is capable of being controlled automatically and manually and is convenient and easy to operate.
Description
Technical field
The utility model belongs to industrial production and processes hydrogen more than needed, the technical field of resources circulation comprehensive utilization, specifically a kind of system of starching paper plant's processing hydrogen more than needed.
Background technology
1,000,000 tons of hardwood pulp factories of a modern employing ECF bleaching process, in its self-produced SYNTHETIC OPTICAL WHITNER, pulping and digesting are used the chemical process of factory production of alkali, a typical complete set has the chemical workshop of chloric alkali electrolysis workshop section and chlorate electrolysis workshop section, produces slurry paper per ton and can consume ClO
217-19kg, NaOH32-40kg, every day, hydrogen more than needed reached 7.9t/d, the hydrogen calorific value 43.2MJ/kg of unit, the about 38.5MJ/kg of heavy oil unit's calorific value, one 1,000,000 tons slurry factory every day hydrogen resource total heating value more than needed be equivalent to 29 tons of heavy oil.The processing mode that most of producer takes direct emptying or discards, inflammable because of hydrogen, therefore for the processing mode of waste gas, will cause producing potential potential safety hazard and the huge waste of renewable resources like this.
The utility model content
In order to solve existing slurry paper plant's processing hydrogen more than needed, can produce the problem of the huge waste of potential potential safety hazard and renewable resources, the utility model is designed a kind of system that paper plant processes hydrogen more than needed of starching, the hydrogen cleaning that this system produces in process of production to slurry paper plant, be convenient to the follow-up cycling and reutilization of realizing, both eliminated the hidden danger of production safety, saved again the energy, whole treatment system level of automation is high, it is easy to control, the hydrogen more than needed produced while being applicable to processing suitability for industrialized production.
For achieving the above object, the technical solution of the utility model is: a kind of system of starching paper plant's processing hydrogen more than needed comprises the water wash column, soda-wash tower, carbon filter, hydrogen gas compressor, water cooler, gas-liquid separator, well heater, the limestone kiln that connect successively.Collect slurry paper plant's production plant hydrogen more than needed out, hydrogen is first through water wash column washing cooling, through soda-wash tower, remove the chlorine in hydrogen gas again, make hydrogen obtain preliminary purification, obtain the hydrogen of preliminary purification, then through carbon filter, further removing the micro-chlorine still existed, send hydrogen to compressor to pressurized with hydrogen again, be convenient to follow-up water cooler cooling and remove the moisture content in gas, from water cooler hydrogen out, through gas-liquid separator, the moisture content hydrogen is separated more fully, hydrogen being sent into to well heater heats up again, prevent that the hydrogen conveying from utilizing in process lower than dew point dewing corrosion pipeline, explosion hazard appears leaking.The hydrogen obtained after water wash column, soda-wash tower, carbon filter, hydrogen gas compressor, water cooler, gas-liquid separator, well heater purification, can be delivered in limestone kiln and utilize, limestone kiln was all the heavy oil of burning in the past, this design of the present utility model not only can make hydrogen more than needed obtain cycling and reutilization, can also save the weight of heavy oil, the cost of fuel saving.
Described system also comprises the separator be connected between hydrogen gas compressor and water cooler, the purpose that reaching dewaters separates, the purpose that prevents follow-up corrosive pipeline.
What in the system of above-mentioned slurry paper plant's processing hydrogen more than needed, adopt is the limestone kiln with following structure, comprises kiln body, support, burning rifle, fan-shaped water cooler, bucket elevator, lime silo, cyclonic separator, scroll feeder and electric dust collector; The burning rifle is fixed on kiln body inside; Kiln hood, tail two ends fixed support fix the kiln body on the ground; Fan-shaped water cooler is fixed on the kiln hood position, and it is connected with lime silo by bucket elevator; The kiln tail is fixedly cyclonic separator, scroll feeder successively, and electric dust collector is connected with cyclonic separator.The model in this limestone kiln is LK750-(4500 * 125000), and the limestone kiln of this kind model is the advanced model that rate of combustion is higher now, is that the monomer alkali of largest domestic reclaims limestone kiln, output 1500t/d; Temperature of kiln head is high, and the lime calcining temperature can reach 1100 ℃; Lime granularity quality is good, purity is high, remaining calcium carbonate content≤3%.
In above-mentioned limestone kiln, have successively heavy oil input aperture, steam-in, hydrogen passage, natural gas passage, waste gas recovery approach, a wind radial passage, a wind axis to passage on burning rifle rifle body.Because this limestone kiln can replace a part of heavy oil with hydrogen, so increased the hydrogen passage on the rifle body of burning rifle.
Between described well heater and limestone kiln, connect successively automatization DCS control unit, strainer, spark arrester.The strainer effect: the broken carbon particle of micro-iron rust, carbon filter leakage in the pipeline of carrying secretly in the filtering hydrogen stream, to prevent from stopping up limestone kiln burning rifle.The effect of spark arrester: one of the needed prerequisite of namely burning will reach certain temperature, i.e. point of ignition exactly.Lower than point of ignition, burning will stop.According to this principle, as long as the temperature of combustion substance is dropped to it below point of ignition, just can stop spreading of flame.After many thin channel of the flame back-fire relief element inner by it, will become some tiny flame.
During the design of this spark arrester, inner back-fire relief element employing Special Metal material is made, quick heat radiating, enlarges as far as possible the contact area of tiny flame and conduit wall, and enhancement of heat transfer, drop to below point of ignition flame temperature, thereby stop propagation of flame.
The structure of above-mentioned automatization DCS control unit comprises hydrogen flowmeter, oxygen analyser, the emergency blow-down device connected successively.Waste gas after purification is first through the hydrogen flowmeter metered flow, then through oxygen analyser monitoring oxygen content is lower than limits of explosion online, the waste gas of guaranteeing to be transported in limestone kiln can safe utilization.
To sum up, the slurry paper plant of the utility model design processes the beneficial effect of waste gas system: the hydrogen more than needed that slurry paper plant collects in workshop thoroughly purifies through water wash column, soda-wash tower, carbon filter, hydrogen gas compressor, water cooler, well heater, hydrogen is transported in limestone kiln and realizes cycling and reutilization, and whole treating processes safety, can not blast, reveal, and the burning that produces of unforeseen circumstances, cause accident, this system can be controlled automatically, also can control manually, facilitates easy to operate.
Hydrogen more than needed according to generation every day of present slurry paper plant's production slurry paper per ton reaches 7.9t/d, the hydrogen calorific value 43.2MJ/kg of unit, the about 38.5MJ/kg of heavy oil unit's calorific value, so limestone kiln utilizes combustion of hydrogen can obtain higher calorific value, can replace to greatest extent using the heavy oil burning lime kiln, original heavy oil that uses: ton lime unit consumption of heavy oil 150kg/tCaO, now owing to having increased use hydrogen, saved heavy oil: ton lime unit consumption of heavy oil decline 15kg/tCaO, saved fuel cost, also reduced the consumption of the heavy oil energy, meet domestic ECF slurry paper industry and will realize and reach " 12 " object of planning, except aspect industrial pattern, progressively eliminating the straw pulp production capacity fallen behind, increase the utilization of commercial wood pulp and waste paper, optimum development woods paper is integrated to be waited outside measure, this is efficient also to need fully to excavate current hydrogen more than needed, green, high-grade energy, accelerate limestone kiln annealing in hydrogen atmosphere gas technology upgrading, realized guaranteeing in development papermaking industry, do not increase or reduce the resource consumption of the fossil energies such as heavy oil and the purpose of pollutant emission.
The accompanying drawing explanation
Fig. 1 is the structural representation that the utility model slurry paper plant processes hydrogen gas system more than needed;
Fig. 2 by the utility model system the structure in employing limestone kiln;
Fig. 3 is the inner fixing burning rifle structural representation in limestone kiln in the utility model;
Nomenclature in figure, 1, water wash column; 2, soda-wash tower; 3, carbon filter; 4, hydrogen gas compressor; 5, gas-liquid separator; 6, water cooler; 7, gas-liquid separator; 8, well heater; 9, DCS control unit; 91, hydrogen flowmeter; 92, oxygen analyser; 93, emergency blow-down device; 10, strainer; 11, spark arrester; 12, limestone kiln; 13, kiln body; 14, support; 15, burning rifle; 16, fan-shaped water cooler; 17, bucket elevator; 18, lime silo; 19, cyclonic separator; 20 scroll feeders; 21, electric dust collector; 22, heavy oil input aperture; 23, steam-in; 24, hydrogen passage; 25, natural gas passage; 26, waste gas recovery approach; 27, wind radial passage; 28, a wind axis is to passage.
Embodiment
Below in conjunction with accompanying drawing, the utility model content is described further.
The utility model slurry paper plant as shown in Figure 1 processes the system of hydrogen more than needed, comprises the water wash column 1, soda-wash tower 2, carbon filter 3, hydrogen gas compressor 4, water cooler 6, gas-liquid separator 7, well heater 8, the limestone kiln 12 that connect successively.
The major function of water wash column, soda-wash tower is that chlorate electrolyser by-product hydrogen is out first through washing cooling, alkali cleaning dechlorination.Water wash column outlet hydrogen temperature reduces to≤and 31 ℃, soda-wash tower alkaline wash available chlorine is controlled at 60～100g/L, remaining alkali is controlled at 10～40g/L, in hydrogen, contains chlorine≤1ppm.The parameter of water wash column, soda-wash tower: (1) hydrogen water wash column 1300x11000; Working pressure 0.01 MPa, glass reinforced plastic lined (FRP/PVC).(2) hydrogen soda-wash tower 400x1100; Working pressure 0.01 MPa; Stainless steel SS.(3) hydrogen chemistry place safety vent pipe, working pressure 0.0005 MPa.
The major function of carbon filter is that the hydrogen after alkali cleaning is removed to micro-chlorine by carbon filter again.Its cardinal principle is to utilize a kind of effect of specifically developed high strength gac, and its regenerative process is utilized high-temperature steam regeneration, warm air/purging.This high strength quality of activated carbon index: intensity >=97.5%, floating ash≤0.1%, iodine sorption value >=900mg/g, size range 4～8 orders (8 orders and be less than 8 purpose carbon percent of pass≤5%), moisture content :≤10%.
Specially designed except dew, anticorrosion technique.It is last conveying process of this system that hydrogen compression, pipeline are carried, and after this being furnished with cools is generating dewfall lower than dew point in process again except water-to-water heat exchanger, the rear hydrogen temperature rise heat exchanger that dewaters prevent from purifying rear hydrogen.
Hydrogen advance after compressor pressurizes hydrogen again dehydrogenation Gas Cooler cooling remove moisture content, after heat exchange, through the hydrogen well heater, heat up to prevent from carrying again and utilize in process lower than dew point dewing corrosion pipeline, explosion hazard occurs leaking.Wherein the heat-eliminating medium of hydrogen is the refrigerated water of 5～8 ℃ of temperature, and cooled hydrogen temperature is 12～15 ℃; Hydrogen after removal moisture also needs to be warming up to higher than dew-point temperature through heat exchange, and take and guarantee that hydrogen temperature is in the winter time still higher than dew point: add the hot water of the heat transferring medium of hot hydrogen as 85～90 ℃ of temperature, the hydrogen temperature of heating is 50～60 ℃.The parameter of hydrogen gas compressor: select the Nash hydrogen gas compressor, 400KW, 1800m
3/ h, specified 0.17 MPa, top hole pressure during work: 0.1MPa (joining siemens's motor), water cooler, hydrogen well heater, be the stainless steel shell and tube heat exchanger of 316L material.
Above-mentioned system also comprises the separator 5 be connected between hydrogen gas compressor and water cooler.
Between this well heater and limestone kiln, connect successively automatization DCS control unit 9, strainer 10, spark arrester 11.Described automatization DCS control unit comprises hydrogen flowmeter 91, oxygen analyser 92, the emergency blow-down device 93 connected successively.The hydrogen more than needed that slurry paper plant production plant is collected is first through the hydrogen flowmeter metered flow after water wash column, soda-wash tower, carbon filter, hydrogen gas compressor, water cooler, well heater purify, through online oxygen analyser, monitor oxygen content lower than limits of explosion again, guarantee follow-up hydric safe utilization.The index of the hydrogen after the purification that records of hydrogen flowmeter, oxygen analyser wherein: hydrogen chlorinity≤1ppm, oxygen content≤2.5%, pressure >=0.1MPa, hydrogen purity >=95%, moisture content≤2.0%, flow >=250kg/h.
The limestone kiln that the utility model adopts as shown in Figure 2, comprises following structure: kiln body 13, support 14, burning rifle 15, fan-shaped water cooler 16, bucket elevator 17, lime silo 18, cyclonic separator 19, scroll feeder 20 and electric dust collector 21; Support is fixed on kiln hood, tail two ends, is used for supporting the stationary kiln body; The burning rifle is fixed on kiln body inside, the kiln hood fixed sectors water cooler of kiln body, and fan-shaped water cooler is connected with lime silo by bucket elevator, and the end of kiln body is scroll feeder and cyclonic separator fixedly, and electric dust collector is connected with cyclonic separator.
In described limestone kiln, as shown in Figure 3, burning has 22, steam-in, heavy oil input aperture 23, hydrogen passage 24, natural gas passage 25 on rifle to the burning rifle successively, reclaim exhaust steam passage 26, wind radial passage 27, a wind axis be to passage 28.
Above-described embodiment is only the utility model most preferred embodiment, and all should drop in the scope of the utility model protection based on the simple change that the above structure has been done.
Claims (6)
1. starch the system that paper plant processes hydrogen more than needed for one kind, it is characterized in that, this system comprises water wash column (1), soda-wash tower (2), carbon filter (3), hydrogen gas compressor (4), water cooler (6), gas-liquid separator (7), well heater (8), limestone kiln (12) that connect successively.
2. the system of slurry paper plant's processing according to claim 1 hydrogen more than needed, is characterized in that, described system comprises the separator (5) be connected between hydrogen gas compressor and water cooler.
3. slurry according to claim 1 paper plant processes the system of hydrogen more than needed, it is characterized in that, the structure in described limestone kiln comprises kiln body (13), support (14), burning rifle (15), fan-shaped water cooler (16), bucket elevator (17), lime silo (18), cyclonic separator (19), scroll feeder (20) and electric dust collector (21); Kiln hood, tail two ends fixed support fix the kiln body on the ground; The burning rifle is fixed on kiln body inside; Fan-shaped water cooler is fixed on the kiln hood position, and it is connected with lime silo by bucket elevator; The kiln tail is fixedly cyclonic separator, scroll feeder successively, and electric dust collector is connected with cyclonic separator.
4. slurry according to claim 3 paper plant processes the system of hydrogen more than needed, it is characterized in that, on the rifle body of burning rifle, have successively heavy oil input aperture (22), steam-in (23), hydrogen passage (24), natural gas passage (25), waste gas recovery approach (26), a wind radial passage (27), a wind axis to passage (28) in described limestone kiln.
5. slurry according to claim 1 paper plant processes the system of hydrogen more than needed, it is characterized in that, between described well heater and limestone kiln, connect successively automatization DCS control unit (9), strainer (10), spark arrester (11).
6. the system of slurry paper plant's processing according to claim 5 hydrogen more than needed, is characterized in that, the structure of described composition automatization DCS control unit comprises hydrogen flowmeter (91), oxygen analyser (92), the emergency blow-down device (93) connected successively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202941087U CN203307047U (en) | 2013-05-27 | 2013-05-27 | System for treating surplus hydrogen in paper mill |
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| CN2013202941087U CN203307047U (en) | 2013-05-27 | 2013-05-27 | System for treating surplus hydrogen in paper mill |
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| CN203307047U true CN203307047U (en) | 2013-11-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253632A (en) * | 2013-05-27 | 2013-08-21 | 亚太森博（山东）浆纸有限公司 | System for treating surplus hydrogen of pulp paper factory and treatment method thereof |
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2013
- 2013-05-27 CN CN2013202941087U patent/CN203307047U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253632A (en) * | 2013-05-27 | 2013-08-21 | 亚太森博（山东）浆纸有限公司 | System for treating surplus hydrogen of pulp paper factory and treatment method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131127 |
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| CX01 | Expiry of patent term |