CN104531177A - Cooling circulation method for coke quenching water vapor and device - Google Patents
Cooling circulation method for coke quenching water vapor and device Download PDFInfo
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- CN104531177A CN104531177A CN201410749580.4A CN201410749580A CN104531177A CN 104531177 A CN104531177 A CN 104531177A CN 201410749580 A CN201410749580 A CN 201410749580A CN 104531177 A CN104531177 A CN 104531177A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B39/00—Cooling or quenching coke
- C10B39/04—Wet quenching
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Abstract
The invention relates to cooling circulation method for coke quenching water vapor and a device. Coke quenching vapor generated by a coke quenching tower is cooled in a spraying water in a condensing tower; hot water generated in the tower enters a cold water tower to be further cooled and recycled; non-condensable vapor from the top of the condensing tower and the cold water tower enters a condenser after being subjected to mist and dust removal, and the mixed vapor is condensed to be divided into gas and liquid; a liquid phase is discharged out; a gas-phase non-condensable gas enters a combustor to be burned, or is subjected to adsorption treatment or catalytic oxidation treatment, and then is introduced into a flue gas to be discharged; before catalytic oxidation treatment, the non-condensable gas is firstly mixed and heated together with other gases; and the gas for mixing is the flue gas of a coke oven or burnt coal gas or a mixture of the flue gas and the burnt coal gas, and thus pollutants are discharged up to the standard through a tail gas treatment procedure.
Description
Technical field
The present invention relates to a kind of coke quenching water steam refrigeration cycle method and device, belong to energy recovery and utilize and field of Environment Protection.
Background technology
In coke production, high temperature coke (red coke) needs to lower the temperature at short notice, i.e. quenching.Traditional coking quenching adopts spray cooling, and the steam of generation does not carry out collecting and the mode of directly discharge naturally, although equipment is simple, with low cost, but the steam of directly discharge can be carried pollutent secretly and be discharged into together in air, seriously polluted, belongs to the with serious pollution part of coking system thereupon.Existing Dry Quenching Technology can not only contaminated solution problem, can also reclaim heat energy, but the investment of existing dry coke quenching equipment is large, and running cost is also high.Because investment is too large, great economic pressures are formed to the operation of coking.Thus develop that a kind of quenching is effective and the cheap coke quenching method also free from environmental pollution of running cost just seems particularly important.The present invention is directed to this problem, develop the flow process of " coke spray cooling → water vapour directly cools+indirect condensing → vent gas treatment or exhaust combustion ", effectively can solve the excessive and with serious pollution problem of above-mentioned investment by water vapour direct contact cooling mode.And the water vapor condensation that in this flow process, quenching produces and recycle are very crucial.Take Control pollution as target, coke quenching auxiliary the smallest investment and the minimized principle of running cost formulate technical scheme, improve, can reduce vapor condensation load, reduce running cost and facility investment for this flow process to existing wet quenching method.
Summary of the invention
The present invention, by improving the conventional wet quenching mode of conventional water jet cooling, natural quenching, solves the recycle problem that cools of a large amount of steam that wet method water spray quenching process produces, and vent gas treatment problem.
The present invention adopts following technical scheme to realize:
A kind of coke quenching water steam refrigeration cycle method, is characterized in that at least being made up of following operation;
(1) coke quenching steam is directly contacted to the one-level condensation procedure of spray cooling;
(2) to the cold water operation that the hot water produced in one-level cooling process cools;
(3) to the B-grade condensation operation that the not solidifying steam of the residue in one-level cooling process and cold water operation cools;
(4) to the vent gas treatment operation of the non-condensable gas after B-grade condensation operation.
Coke quenching steam one-level condensation procedure of the present invention: operation occurs in condensing tower; Coke quenching steam from coke quenching tower enters tower and directly contacts with the water that tower top sprays at the bottom of condensing tower, and coke quenching steam major part becomes and to fall into after hot water mixes with the water that tower top sprays bottom condensing tower and to discharge, and solidifying steam is discharged from tower top outlet; The water of tower top ejection comes from the bottom of water cooling tower tower.A large amount of coke quenching steams coke quenching tower being produced through one-level condensation procedure cooling rapidly and efficiently.
Condensing tower of the present invention can be the conventional towers such as void tower, tray column or packing tower.
Cold water operation of the present invention: operation occurs in water cooling tower; Discharge at the bottom of hot water self-condensation tower tower and enter water cooling tower top, the water coolant after cooling falls at the bottom of water cooling tower tower, and enter condensing tower tower top in the effect next section circulation of water pump, another part enters coke quenching tower; Effusion part water vapour in water cooling tower, steam is not substantially containing pollutent.
By such scheme, water cooling tower runs continuously, condensing tower intermittent operation, greatly reduces the flow of recirculated cooling water.
B-grade condensation operation of the present invention occurs in condenser, and the type of cooling is indirect heat exchange, arranges conventional demister before condensation; Coke quenching steam also has a small amount of not solidifying steam after the process of one-level condensation procedure, enters condenser after mixing with part water vapour of overflowing in water cooling tower; Mixing steam is divided into gas-liquid two strands after condensation, and liquid phase returns water cooling tower or arranges outward.
Non-condensable gas of the present invention is through the gas of condenser refrigerated separation, wherein comprises a certain amount of water vapour, at this referred to as non-condensable gas.
Dust removal process is carried out to the not solidifying steam between one-level condensation procedure and B-grade condensation operation, or dust removal process is carried out to the non-condensable gas after secondary condenser.Though there is a large amount of coke powder dirt to enter liquid phase in jet condensation tower, also may has dust in gas phase and exist, need to carry out dust removal process to it.
Vent gas treatment operation of the present invention: the gas phase non-condensable gas that condenser separates enters burner combustion process or passes in stack gas after adsorption treatment or catalytic oxidation treatment and discharges.Before catalytic oxidation treatment, non-condensable gas first through heating up with other gas and vapor permeation, the gas for mixing be coal gas after flue gases of cock oven or burning or the two have concurrently.The qualified discharge of pollutent is realized by vent gas treatment operation.
Realize device of the present invention, be at least made up of coke quenching tower, condensing tower, water cooling tower and condenser; Coke quenching tower vapour outlet is connected with the import of condensing tower tower spirit phase; Liquid-phase outlet at the bottom of condensing tower tower is connected with water cooling tower upper aqueous phase on the suction side, can arrange aqua storage tank in this pipeline, and aqua storage tank can be connected with coke quenching tower water jet; The outlet of water cooling tower bottom liquid phases is connected with the import of condensing tower upper aqueous phase and coke quenching tower water jet; The outlet of condensing tower top gaseous phase is connected with condenser inlet; The outlet of water cooling tower top gaseous phase is connected with condenser inlet; Cool condenser gaseous phase outlet is connected with burner inlet, adsorption unit entrance or catalytic oxidizing equipment entrance.
Conventional conduit is adopted to connect between operation of the present invention.According to a conventional method, wherein the position of Pumps & Fans is with reference to actually operating for the suction of system or pressurization.
The invention has the beneficial effects as follows, the one-level condensation procedure of coke quenching steam adopts high-efficiency condensation tower, by spraying water in tower, makes water and coke quenching steam direct contact heat transfer, avoids the huge problem of equipment that heat interchanging area that employing indirect heat exchange mode produces brings greatly; The structural drag of condensing tower is little in addition, without blockage problem.
Accompanying drawing explanation
Fig. 1: the refrigeration cycle of implementation column 1 coke quenching steam and vent gas treatment schematic flow sheet;
Fig. 2: the refrigeration cycle of implementation column 2 coke quenching steam and vent gas treatment schematic flow sheet;
Fig. 3: non-condensable gas catalyzed oxidation schematic flow sheet;
In figure: 1-coke quenching tower; 2-condensing tower; 3-aqua storage tank; 4-water cooling tower; 5-condenser; 6-burner; 7-adsorption unit; 8-catalytic oxidizing equipment; 9-mixing tank; 10-chimney; 11-non-condensable gas; 12-flue gases of cock oven or the coal gas after burning;
Illustrate: the dotted line in Fig. 1 and Fig. 2 represents non-condensable gas process feasible path, in three paths, select wherein one.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Embodiment 1
Of the present invention a kind of coke quenching water steam refrigeration cycle method as shown in Figure 1 and device, coke quenching steam from coke quenching tower 1 enters tower and directly contacts with the water that tower top sprays bottom condensing tower 2, and coke quenching steam major part becomes and to fall into after hot water mixes with the water that tower top sprays bottom condensing tower and to discharge.Condensing tower is void tower structure.Enter water cooling tower 4 top after discharging at the bottom of hot water self-condensation tower tower, the water coolant after cooling falls at the bottom of water cooling tower tower, and enter condensing tower tower top in the effect next section circulation of water pump, another part enters coke quenching tower; Effusion part water vapour in water cooling tower.Not solidifying steam on a small quantity from condensation tower top and water cooling tower enters condenser 5 after demist and dedusting, and after condensation, be divided into gas-liquid two strands, liquid phase is arranged outward, and gas phase non-condensable gas 11 passes in stack gas after entering burner 6 burn processing and discharges.Water cooling tower runs continuously, condensing tower intermittent operation, greatly reduces the flow of recirculated cooling water.This method reduce peak load and the circulating cooling water flow of condensing equipment, the structural drag of condensing tower is little, without blockage problem, reduces investment and the running cost of equipment, and effectively reduces the content of objectionable impurities in non-condensable gas.
Embodiment 2
Of the present invention a kind of coke quenching water steam refrigeration cycle method as shown in Figure 2 and device, coke quenching steam from coke quenching tower 1 enters tower and directly contacts with the water that tower top sprays bottom condensing tower 2, and coke quenching steam major part becomes and to fall into after hot water mixes with the water that tower top sprays bottom condensing tower and to discharge.Condensing tower is plank frame.Enter aqua storage tank 3 after discharging at the bottom of hot water self-condensation tower tower, in groove, a part of water enters coke quenching tower in the effect next section of water pump, and another part enters water cooling tower 4.The hot water entering water cooling tower top falls at the bottom of water cooling tower tower after cooling, and under the effect of water pump, circulation enters condensing tower tower top.Not solidifying steam on a small quantity from condensation tower top and water cooling tower enters condenser 5 after demist, and after condensation, be divided into gas-liquid two strands, liquid phase is arranged outward, and gas phase non-condensable gas 11 passes in stack gas enter adsorption unit 7 process after dedusting after and discharges.This method reduce peak load and the circulating cooling water flow of condensing equipment, and effectively reduce the content of objectionable impurities in non-condensable gas.
Embodiment 3
The present embodiment is substantially the same manner as Example 1, difference is that the non-condensable gas 11 that condenser 5 is discharged as shown in Figure 3 enters mixing tank 9 with flue gas portion, mix rear temperature to rise, gas mixture enters catalytic oxidizing equipment 8 again and processes, and finally passes in stack gas and discharges.
Embodiment 4
The present embodiment is substantially the same manner as Example 3, difference to be the gas entering mixing tank 9 be non-condensable gas 11 that condenser 5 discharges and the coal gas after burning.
Embodiment 5
The present embodiment is substantially the same manner as Example 3, and difference is the gas entering mixing tank 9 is non-condensable gas, flue gas portion and the coal gas after burning that condenser 5 is discharged.
Claims (7)
1. the quenching in coking industry produces a treatment process for steam, it is characterized in that at least being made up of following operation;
(1) coke quenching steam is directly contacted to the one-level condensation procedure of spray cooling;
(2) to the cold water operation that the hot water produced in one-level cooling process cools;
(3) to the B-grade condensation operation that the not solidifying steam of the residue in one-level cooling process and cold water operation cools;
(4) to the vent gas treatment operation of the non-condensable gas after B-grade condensation operation.
2. the method for claim 1, is characterized in that: one-level condensation procedure (1) occurs in condensing tower; Condensing mode is at the bottom of condensing tower, enter from the coke quenching steam of coke quenching tower the water direct contact heat-exchanging that tower and tower top spray, and coke quenching steam major part becomes and to fall into after hot water mixes with the water that tower top sprays bottom condensing tower and to discharge; The water of tower top ejection comes from the bottom of water cooling tower tower.
3. the method for claim 1, is characterized in that: the processing mode of the non-condensable gas described in vent gas treatment operation (4) is that non-condensable gas enters burner process or passes in stack gas after adsorption treatment or catalytic oxidation treatment and discharges.
4. method as claimed in claim 3, is characterized in that: before catalytic oxidation treatment, non-condensable gas first through heating up with other gas and vapor permeation, the gas for mixing be coal gas after flue gases of cock oven or burning or the two have concurrently.
5. the method for claim 1, is characterized in that carrying out dust removal process to the non-condensable gas between one-level condensation procedure and B-grade condensation operation, or carries out dust removal process to the non-condensable gas after secondary condenser.
6. realize the device of method described in claim 1, it is characterized in that at least being made up of coke quenching tower, condensing tower, water cooling tower and condenser; Coke quenching tower vapour outlet is connected with the import of condensing tower tower spirit phase; Liquid-phase outlet at the bottom of condensing tower tower is connected with water cooling tower upper aqueous phase on the suction side; The outlet of water cooling tower bottom liquid phases is connected with condensing tower upper aqueous phase on the suction side; The outlet of condensing tower top gaseous phase is connected with condenser inlet; The outlet of water cooling tower top gaseous phase is connected with condenser inlet.
7. device as claimed in claim 6, is characterized in that liquid-phase outlet at the bottom of condensing tower tower and arranges aqua storage tank between the import of water cooling tower upper aqueous phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410749580.4A CN104531177A (en) | 2014-12-09 | 2014-12-09 | Cooling circulation method for coke quenching water vapor and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410749580.4A CN104531177A (en) | 2014-12-09 | 2014-12-09 | Cooling circulation method for coke quenching water vapor and device |
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| CN104531177A true CN104531177A (en) | 2015-04-22 |
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| CN201410749580.4A Pending CN104531177A (en) | 2014-12-09 | 2014-12-09 | Cooling circulation method for coke quenching water vapor and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205146A (en) * | 2018-05-30 | 2019-09-06 | 西安华江环保科技股份有限公司 | A kind of steam pressure quenching system and method |
| CN110257085A (en) * | 2019-07-24 | 2019-09-20 | 邢台旭阳科技有限公司 | The closed coke quenching device in ground |
| CN112535931A (en) * | 2020-12-22 | 2021-03-23 | 中冶焦耐(大连)工程技术有限公司 | Multiple purification device and method for dedusting and bleaching wet quenching coke sealing quenching flue gas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201177462Y (en) * | 2007-10-31 | 2009-01-07 | 北京弘泰汇明能源技术有限责任公司 | Coke quenching steam-condensed water separation and recovery plant |
-
2014
- 2014-12-09 CN CN201410749580.4A patent/CN104531177A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201177462Y (en) * | 2007-10-31 | 2009-01-07 | 北京弘泰汇明能源技术有限责任公司 | Coke quenching steam-condensed water separation and recovery plant |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110205146A (en) * | 2018-05-30 | 2019-09-06 | 西安华江环保科技股份有限公司 | A kind of steam pressure quenching system and method |
| CN110257085A (en) * | 2019-07-24 | 2019-09-20 | 邢台旭阳科技有限公司 | The closed coke quenching device in ground |
| CN112535931A (en) * | 2020-12-22 | 2021-03-23 | 中冶焦耐(大连)工程技术有限公司 | Multiple purification device and method for dedusting and bleaching wet quenching coke sealing quenching flue gas |
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Application publication date: 20150422 |