CN206008418U - Energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus - Google Patents

Energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus Download PDF

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Publication number
CN206008418U
CN206008418U CN201620948806.8U CN201620948806U CN206008418U CN 206008418 U CN206008418 U CN 206008418U CN 201620948806 U CN201620948806 U CN 201620948806U CN 206008418 U CN206008418 U CN 206008418U
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oxidation
tower
absorption
liquid
energy
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CN201620948806.8U
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Inventor
郭宏新
李奇
刘丰
树童
徐威
张贤福
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Shandong Yangguang Engineering Design Institute Co., Ltd.
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Zhongsheng High Science & Technology Industry Co Ltd Jiangsu
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Abstract

The utility model discloses a kind of energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus,Including absorption tower,Absorption tower bottom is provided with gas approach,There is in absorption tower the demisting section for arranging from top to bottom、Absorber portion、Oxidation panel、Enriching section,Demisting section includes the one-level demister for being arranged on absorption tower top,Washing layer is provided with below one-level demister,Absorber portion includes the absorbed layer below washing layer,Enriching section includes being arranged on concentration spraying layer and the concentration basin positioned at absorbing tower bottom above gas approach,Oxidation panel includes that inside is connected with the oxidation pond of ozone,Oxidation pond is arranged between absorbed layer and concentration spraying layer and is connected with concentration spraying layer,It is located on desulfurizing tower oxidation panel above oxidation pond and is provided with hydrogenperoxide steam generator access tube,Demisting section includes the absorption groove connected with absorption tower tower top,Absorb the side that groove is arranged on absorption tower,Absorb groove and be provided with exhanst gas outlet,Two grades of demisters are provided with exhanst gas outlet.This utility model has raising adsorption efficiency, energy saving.

Description

Energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus
Technical field
This utility model is related to a kind of ammonia process of desulfurization denitrification apparatus of coal-fired flue-gas, specifically a kind of energy-efficient Gas-liquid couples oxidation sweetening denitrification apparatus, belongs to the environmental technology field of control pollution that caused by coal burning thing discharge.
Background technology
The SO produced in coal-fired flue-gas2、NOxThere are high risks Deng pollutant to atmospheric environment, ecological and human health, with Environmental requirement more and more stricter, SO2And NOxControl Deng reduction of discharging is also progressively being strengthened.
The technique for being applied to flue gas desulfurization has a lot, and wet desulfurizing process is to apply most sulfur methods at present, and ammonia The one kind of method desulfurization as wet desulfurizing process, its device absorb the SO in flue gas using ammonia or ammonium sulfite etc. as absorbent2, At home and abroad apply in wet desulfurizing process relatively broad.It is characterized in that desulfurization degree is high, run more stable, desulfurizing byproduct sulphuric acid Ammonium is a kind of higher agrochemical of use value, and whole system does not produce waste water or waste residue.
But, the ammonia process of desulfurization there is also a little problems at present:Contain to SO in circulation fluid2There is the ammonium sulfite of Absorption While, also containing substantial amounts of ammonium sulfate composition, cause a large amount of consumed energies of recycle liquid pump power to waste;Ammonia absorbent consumption Big and there is the escaping of ammonia;The portable droplet of exiting flue gas and aerosol, it is difficult to remove completely;Producing ammonium sulfate byproduct quality Not high, overall device plant investment and operating cost higher etc..Therefore, ammonia process of desulfurization denitrification apparatus structure still has larger changing Enter space, research and development are efficient, stable, inexpensive wet desulphurization denitrification apparatus, have very strong realistic meaning and promotional value.
Utility model content
The purpose of this utility model is to provide a kind of raising adsorption efficiency, the energy-efficient gas of the loss of reduction energy Liquid couples oxidation sweetening denitrification apparatus, so as to reach energy-efficient purpose.
This utility model is adopted the following technical scheme that:A kind of energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus, bag Absorption tower is included, absorption tower bottom is provided with gas approach, there is demisting section and the absorber portion below demisting section in absorption tower, remove Mist section includes the one-level demister for being arranged on absorption tower top, is provided with washing layer below one-level demister, and absorber portion includes being located at Absorbed layer below washing layer, the absorption tower bottommost is enriching section, is provided with oxidation panel between enriching section and absorber portion, concentrates Section includes being arranged on concentration spraying layer and the concentration basin positioned at absorbing tower bottom above gas approach, and the oxidation panel includes interior Portion is connected with the oxidation pond of ozone, and oxidation pond is arranged between absorbed layer and concentration spraying layer and is connected with concentration spraying layer, described It is located on desulfurizing tower oxidation panel above oxidation pond and is provided with hydrogenperoxide steam generator access tube, the demisting section includes and absorption tower tower top The absorption groove of connection, absorbs the side that groove is arranged on absorption tower, absorbs groove and is provided with exhanst gas outlet, is provided with two grades in exhanst gas outlet Demister.
For v-shaped structure, one end of the absorption groove of v-shaped structure is connected the groove that absorbs with absorption tower tower top, and the flue gas goes out Mouth is arranged on the other end of the absorption groove of v-shaped structure, and the V-type angle of the absorption groove of v-shaped structure is 40 ° ~ 90 °.
The ozonator being connected with the oxidation pond outside absorption tower.
Oxidation distributor pipe is provided with the oxidation pond.
Oxidation catch tray is provided with above the oxidation pond.
Absorption catch tray is provided between the first absorber and secondary absorber, offers gas and lead on absorption catch tray Road.
The absorption tower is externally provided with ammonium sulfate crystallization system, and ammonium sulfate crystallization system includes and following that the absorber portion is connected Annular groove and the cyclone separator being connected with the enriching section, are connected with centrifuge and exsiccator in turn on cyclone separator, described The centrifugal liquid recovery channel being passed in circulating slot is connected with centrifuge, and there is on the exsiccator heat exchange structure.
The circulating slot is provided with ammonia and supplements pipe
Cooling spray thrower is provided with the gas approach, and the cooling spray thrower is connected with the concentration basin.
Operationally, about 200 DEG C of flue gases of temperature are by gas approach temperature control after spray thrower cooling of lowering the temperature for this utility model At 70 DEG C ~ 80 DEG C, flue gas ascends into oxidation panel and absorber portion to system, and flue gas is after absorbed layer with absorbing liquid reaction through absorbing liquid collecting Disk returns circulating slot and forms circulation, SO in flue gas2And NOxRespectively by two grades of absorbed layers, catch tray and first order absorption layer and ammonia Demisting section demisting is entered after reactive absorption.Absorber portion flue gas flow rate is about controlled in 2.5 ~ 4m/s, and optimum flow rate is 3 ~ 3.5 m/s. Control at 50 ~ 60 DEG C with the reacted flue-gas temperature of absorbing liquid, reacted flue gas passes sequentially through one-level demister, through V-arrangement The absorption groove of structure, then discharge after chimney is entered by flue through two grades of demisters.One-level and two grades of demister junctions are provided with V Type technique tank, arranges 40 ° ~ 90 ° of V-type angle according to exhaust gas volumn, can increase the contact area of flue gas and the water surface, can both pass through Absorption reduces the escaping of ammonia, more effectively removes the drop and aerosol in flue gas further through effect of inertia.
In oxidation panel, ozone is produced by ozonator, ozone is delivered to oxidation pond by oxidation distributor pipe, using ozone Remaining NO in flue gas is oxidized to the higher high-valence state nitrogen oxides of dissolubility by strong oxidizing property, while joining with hydrogenperoxide steam generator Collaboration is closed as strong oxidizer, the hydroxyl radical free radical of more strong oxidizing properties can be produced, quickly and efficiently oxidative salt And nitrite, while solve the problems, such as that tradition is big using pump energy expenditure.Using novel tower internal oxidition mode, oxidation panel is arranged On the top of enriching section, the advantage being configured so that is compared with conventional tower internal oxidition, without the need for extracting circulation from desulfurization tower bottom Liquid, can effectively reduce cyclic absorption liquid measure, oxidation reinforced dose of absorption rate;Compare conventional tower external oxidation simultaneously, save Space need not additionally set up an oxidation unit, and simplified system reduces equipment investment.
Oxidation overflowing liquid is concentrated after concentrating spraying layer, and bottom concentrated solution enters cooling spray thrower by concentration cycles pump Accelerate crystallization to obtain 10 ~ 15% concentrated solution of solid content using the flue gas heat evaporation that heats up, and after obtain solid content through swirl concentrator 40% ~ 50% concentrated solution, then solid content reaches 95 ~ 97% after whizzer, last drying device obtains solid content and is more than 99% by-product ammonium sulfate.
This utility model has the advantage that:1)Coordinate entire work flow integration operation, carry out in absorption tower demisting cleaning, Absorbing reaction, absorption liquid oxidation, absorbing liquid concentration.2)Two-stage absorbed layer is set so as to only partial oxidation absorbing liquid, is improved and is absorbed Efficiency.3)Using novel tower internal oxidition mode, oxidation panel is arranged on the top of enriching section, and the advantage being configured so that is and tradition Tower internal oxidition is compared, and without the need for extracting circulation fluid from desulfurization tower bottom, can effectively reduce cyclic absorption liquid measure, oxidation reinforced dose Absorption rate;Conventional tower external oxidation is compared simultaneously, and save space need not additionally set up an oxidation unit, simplified system, drop Low equipment investment.4)One-level and two grades of demister junctions are provided with v-shaped structure and absorb groove, arrange 40 ° of V-type angle according to exhaust gas volumn ~ 90 °, increase the contact area of flue gas and the water surface, both the escaping of ammonia can be reduced by Absorption, and more be had further through effect of inertia Effect removes drop and aerosol in flue gas.5)Combine gas-liquid coupling in absorbing liquid oxide regions with hydrogenperoxide steam generator using ozone Oxidation is closed, the shortcomings of overcome conventionally employed air oxidation process to there is oxidation cycle length and big pump energy expenditure, while both join The hydroxyl radical free radical that can produce more strong oxidizing properties is closed, quickly and efficiently oxidative salt and nitrite, so as to true The minimizing of flue gas desulfurization and denitrification technology, recycling, resource are just being realized.
Description of the drawings
Fig. 1 is a kind of structural representation of embodiment of the energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus of this utility model Figure.
In figure, 1 chimney;2 exhanst gas outlets;3 two grades of demisters;4 absorb groove;5 absorption towers;6 one-level demisters;7 washing layers; 8 first order absorption layers;9 absorb catch tray;10 2 grades of absorbed layers;11 oxidation catch trays;12 oxidation distributor pipes;13 ozonators; 14 smoke inlets;15 cooling spray throwers;16 concentration cycles pumps;17 oxidation ponds;18 concentration spraying layers;19 concentration basins;20 absorptions are followed Ring pump;21 circulating slots;22 sulphur ammonium pumps;23 swirl concentrators;24 centrifuges;25 exsiccators;26 hydrogenperoxide steam generator access tubes;27 Ammonia supplements pipe.
Specific embodiment
This utility model is described in detail with specific embodiment below in conjunction with the accompanying drawings.
A kind of structure of embodiment such as Fig. 1 institutes of the energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus of this utility model Show, the gas-liquid coupling oxidation sweetening denitrification apparatus of the present embodiment, including absorption tower 5,5 bottom of absorption tower is provided with gas approach 14, Cooling spray thrower 15 is provided with gas approach 14, and there is in absorption tower 5 demisting section and the absorber portion below demisting section, demisting Section includes the one-level demister 6 for being arranged on absorption tower top, is provided with washing layer 7 below one-level demister 6, and absorber portion includes being located at Absorbed layer below washing layer, the absorbed layer include first absorber 8 and the secondary absorber below first absorber 8 10, absorption catch tray 9 is provided between first absorber 8 and secondary absorber 10, to be absorbed and offer gas passage on catch tray 9. The absorption tower bottommost is enriching section, is provided with oxidation panel between enriching section and absorber portion, and enriching section includes that being arranged on flue gas enters Concentration spraying layer 18 and the concentration basin 19 positioned at absorbing tower bottom above mouthful, the cooling spray thrower 15 and the concentration basin 19 Connection, the pipeline between spray thrower 15 and concentration basin 19 of lowering the temperature are provided with concentration cycles pump 16, and the oxidation panel includes internal logical There is the oxidation pond 17 of ozone, the ozonator 13 outside absorption tower is connected with oxidation pond 17, oxygen is provided with oxidation pond 17 Change distributor pipe 12, oxidation pond 17 is arranged between absorbed layer and concentration spraying layer and is connected with concentration spraying layer 18, oxidation pond 17 Top is provided with oxidation catch tray 11, is located above oxidation pond 17 and is provided with hydrogenperoxide steam generator access tube on the desulfurizing tower oxidation panel 26, the demisting section includes the absorption groove 4 connected with absorption tower tower top, absorbs the side that groove 4 is arranged on absorption tower 5, absorbs groove 4 Exhanst gas outlet 2 is provided with, and two grades of demisters 3 is provided with exhanst gas outlet 2, is connected with chimney 1 on exhanst gas outlet 2.The present embodiment Absorption groove 4 be v-shaped structure, v-shaped structure absorption groove 4 one end connect with 5 tower top of absorption tower, the exhanst gas outlet 2 is arranged on V The other end of the absorption groove of shape structure, the V-type angle of the absorption groove of v-shaped structure is 40 ° ~ 90 °.
The absorption tower 5 is externally provided with ammonium sulfate crystallization system, and ammonium sulfate crystallization system includes being connected with the absorber portion Circulating slot 21 and the cyclone separator 23 being connected with the enriching section, the circulating slot are provided with ammonia and supplement pipe 27, and oxidation is followed Pipeline between annular groove 21 and absorber portion is provided with absorbent recirculation pump 20, on the pipeline between concentration basin 19 and cyclone separator 23 Thiamine pump 22 is provided with, centrifuge 24 and exsiccator 25 is connected with cyclone separator 23 in turn, is connected with the centrifuge 24 The centrifugal liquid recovery channel being passed in circulating slot 21, has heat exchange structure on the exsiccator 25.
Operationally, about 200 DEG C of flue gases of temperature are by gas approach temperature control after spray thrower cooling of lowering the temperature for this utility model At 70 DEG C ~ 80 DEG C, flue gas ascends into oxidation panel and absorber portion to system, and flue gas is after absorbed layer with absorbing liquid reaction through absorbing liquid collecting Disk returns circulating slot and forms circulation, SO in flue gas2And NOxRespectively by two grades of absorbed layers, catch tray and first order absorption layer and ammonia Demisting section demisting is entered after reactive absorption.Absorber portion flue gas flow rate is about controlled in 2.5 ~ 4m/s, and optimum flow rate is 3 ~ 3.5 m/s. Control at 50 ~ 60 DEG C with the reacted flue-gas temperature of absorbing liquid, reacted flue gas passes sequentially through one-level demister, through V-arrangement The absorption groove of structure, then discharge after chimney is entered by flue through two grades of demisters.One-level and two grades of demister junctions are provided with V Type technique tank, arranges 40 ° ~ 90 ° of V-type angle according to exhaust gas volumn, can increase the contact area of flue gas and the water surface, can both pass through Absorption reduces the escaping of ammonia, more effectively removes the drop and aerosol in flue gas further through effect of inertia.
In oxidation panel, ozone is produced by ozonator, ozone is delivered to oxidation pond by oxidation distributor pipe, using ozone Remaining NO in flue gas is oxidized to the higher high-valence state nitrogen oxides of dissolubility by strong oxidizing property, while joining with hydrogenperoxide steam generator Collaboration is closed as strong oxidizer, the hydroxyl radical free radical of more strong oxidizing properties can be produced, quickly and efficiently oxidative salt And nitrite, while solve the problems, such as that tradition is big using pump energy expenditure.When being embodied as, often oxidation 1L circulation fluids need to consume 50 ~ 200L of ozone amount, optimised quantity are 100 ~ 150L, and ozone concentration is 0.01 ~ 0.02g/L;Hydrogenperoxide steam generator consumption be 50 ~ 200ml, optimised quantity are 100 ~ 150ml, and hydrogen peroxide concentration is 25% ~ 35%, and optium concentration is 30%;Ammonium sulfite solution controls pH Value 4 ~ 6, optimum are 5.5.Using novel tower internal oxidition mode, oxidation panel is arranged on the top of enriching section, and be configured so that is excellent Point is compared with conventional tower internal oxidition, without the need for from desulfurization tower bottom extraction circulation fluid, can effectively reduce cyclic absorption liquid measure, Oxidation reinforced dose of absorption rate;Conventional tower external oxidation is compared simultaneously, save space need not additionally set up an oxidation unit, Simplified system, reduces equipment investment.
Oxidation overflowing liquid is concentrated after concentrating spraying layer, and bottom concentrated solution enters cooling spray thrower by concentration cycles pump Accelerate crystallization to obtain 10 ~ 15% concentrated solution of solid content using the flue gas heat evaporation that heats up, and after obtain solid content through swirl concentrator 40% ~ 50% concentrated solution, then solid content reaches 95 ~ 97% after whizzer, last drying device obtains solid content and is more than 99% by-product ammonium sulfate.
In sum, this device has the advantage that:1)Coordinate entire work flow integration operation, in absorption tower, carry out demisting Cleaning, absorbing reaction, absorption liquid oxidation, absorbing liquid concentration.2)Two-stage absorbed layer is set so as to only partial oxidation absorbing liquid, is carried High-selenium corn efficiency.3)Using novel tower internal oxidition mode, oxidation panel is arranged on the top of enriching section, and the advantage being configured so that is Compared with conventional tower internal oxidition, without the need for circulation fluid being extracted from desulfurization tower bottom, can effectively reduce cyclic absorption liquid measure, strengthen oxygen The absorption rate of agent;Conventional tower external oxidation is compared simultaneously, and save space need not additionally set up an oxidation unit, simplify system System, reduces equipment investment.4)One-level and two grades of demister junctions are provided with v-shaped structure and absorb groove, arrange V-type angle according to exhaust gas volumn 40 ° ~ 90 ° of degree, increases the contact area of flue gas and the water surface, both can reduce the escaping of ammonia by Absorption, and make further through inertia With the drop and aerosol that more effectively remove in flue gas.5)Combined with hydrogenperoxide steam generator using ozone in absorbing liquid oxide regions Gas-liquid coupling oxidation, the shortcomings of overcome conventionally employed air oxidation process to there is oxidation cycle length and big pump energy expenditure, while Both joints can produce the hydroxyl radical free radical of more strong oxidizing properties, quickly and efficiently oxidative salt and nitrite, So as to really realize the minimizing of flue gas desulfurization and denitrification technology, recycling, resource.

Claims (10)

1. energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus, including absorption tower(5), absorption tower(5)Bottom is provided with flue gas Import(14), absorption tower(5)Interior absorber portion with demisting section and below demisting section, demisting section include being arranged on absorption tower The one-level demister on top(6), one-level demister(6)Lower section is provided with washing layer(7), absorber portion include positioned at washing layer(7)Under The absorbed layer of side, it is characterised in that:The absorption tower(5)Bottommost is enriching section, is provided with oxidation between enriching section and absorber portion Section, enriching section include being arranged on the concentration spraying layer above gas approach(18)With the concentration basin for being located at absorbing tower bottom(19), The oxidation panel includes that inside is connected with the oxidation pond of ozone(17), oxidation pond(17)It is arranged on absorbed layer and concentration spraying layer(18) Between and with concentration spraying layer(18)Connection, is located at oxidation pond on the desulfurizing tower oxidation panel(17)It is molten that top is provided with hydrogen peroxide Liquid access tube(26), the demisting section includes the absorption groove connected with absorption tower tower top(4), absorb groove(4)It is arranged on absorption tower (5)Side, absorb groove(4)It is provided with exhanst gas outlet(2), exhanst gas outlet(2)Two grade demisters are inside provided with(3).
2. energy-efficient gas-liquid according to claim 1 couples oxidation sweetening denitrification apparatus, it is characterised in that:The suction Receive groove(4)For v-shaped structure, the absorption groove of v-shaped structure(4)One end and absorption tower(5)Tower top is connected, the exhanst gas outlet(2) The other end of the absorption groove of v-shaped structure is arranged on, the V-type angle of the absorption groove of v-shaped structure is 40 ° ~ 90 °.
3. energy-efficient gas-liquid according to claim 1 couples oxidation sweetening denitrification apparatus, it is characterised in that:The oxygen Change pond(17)On be connected with the ozonator outside absorption tower(13).
4. energy-efficient gas-liquid according to claim 1 couples oxidation sweetening denitrification apparatus, it is characterised in that:The oxygen Change pond(17)Oxidation distributor pipe is inside provided with(12).
5. energy-efficient gas-liquid according to claim 1 couples oxidation sweetening denitrification apparatus, it is characterised in that:The oxygen Change pond(17)Top is provided with oxidation catch tray(11).
6. energy-efficient gas-liquid according to claim 1 couples oxidation sweetening denitrification apparatus, it is characterised in that:The suction Receiving layer includes first absorber(8)Be located at first absorber(8)The secondary absorber of lower section(10).
7. energy-efficient gas-liquid according to claim 6 couples oxidation sweetening denitrification apparatus, it is characterised in that:Described one Level absorber(8)And secondary absorber(10)Between be provided with absorption catch tray(9), absorb catch tray(9)On offer gas lead to Road.
8. energy-efficient gas-liquid according to claim 1 couples oxidation sweetening denitrification apparatus, it is characterised in that:The suction Receive tower and be externally provided with ammonium sulfate crystallization system, ammonium sulfate crystallization system includes the circulating slot being connected with the absorber portion(21)And with institute State the cyclone separator of enriching section connection(23), cyclone separator(23)On be connected with centrifuge in turn(24)And exsiccator (25), the centrifuge(24)On be connected with and be passed into circulating slot(21)In centrifugal liquid recovery channel, the exsiccator(16) Upper have heat exchange structure.
9. energy-efficient gas-liquid according to claim 8 couples oxidation sweetening denitrification apparatus, it is characterised in that:Described follow Annular groove(21)It is provided with ammonia and supplements pipe(27).
10. energy-efficient gas-liquid according to claim 1 couples oxidation sweetening denitrification apparatus, it is characterised in that:Described Gas approach(14)Place is provided with cooling spray thrower(15), the cooling spray thrower(15)With the concentration basin(19)Connection.
CN201620948806.8U 2016-08-26 2016-08-26 Energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus Active CN206008418U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106139850A (en) * 2016-08-26 2016-11-23 江苏中圣高科技产业有限公司 A kind of energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106139850A (en) * 2016-08-26 2016-11-23 江苏中圣高科技产业有限公司 A kind of energy-efficient gas-liquid coupling oxidation sweetening denitrification apparatus
CN106139850B (en) * 2016-08-26 2020-01-14 江苏中圣高科技产业有限公司 Energy-efficient gas-liquid coupling oxidation SOx/NOx control device

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Effective date of registration: 20180214

Address after: Xinluo Avenue high tech Zone of Ji'nan City, Shandong province 250101 silver bearing No. 2008 building E block 4 layer

Patentee after: Shandong Yangguang Engineering Design Institute Co., Ltd.

Address before: 211112 Jiangning City, Nanjing Province, the integrity of the road No. 2111,

Patentee before: Zhongsheng High Science & Technology Industry Co., Ltd., Jiangsu