CN218794904U

CN218794904U - Coal coking production flue gas treatment system

Info

Publication number: CN218794904U
Application number: CN202223278550.9U
Authority: CN
Inventors: 田增强; 张国军
Original assignee: Jiuquan Jin Yuan Mining Co ltd
Current assignee: Jiuquan Jin Yuan Mining Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-04-07
Anticipated expiration: 2032-12-07

Abstract

The utility model discloses a coal coking production flue gas processing system, the bottom is provided with the hair-dryer in the rose box, the hair-dryer top is provided with the heating wire, the heating wire top is provided with the filter layer, the gaseous detector of fixedly connected with in the detection case, draught fan B and electromagnetism three-way valve intercommunication are passed through in the export of detection case upper end, electromagnetism three-way valve respectively with the circulating pipe, discharge fume the union coupling, the circulating pipe with denitration tower entry linkage. The utility model has the advantages that the blower and the electric heating wire are arranged at the bottom of the filter box, the filter layer is arranged above the filter box, the treated flue gas can be finely filtered, the water content in the flue gas is reduced, and the condensation of the flue gas after the emission of the flue gas is avoided to form white smoke; through setting up gas detection appearance, electromagnetism three-way valve, control module, can carry out real-time supervision to the flue gas after handling, detect that the flue gas can reach standard and directly discharge, can carry out desulfurization denitration again and handle when not reaching the emission standard.

Description

Coal coking production flue gas processing system

Technical Field

The utility model relates to a coal coking production flue gas processing apparatus technical field specifically is a coal coking production flue gas processing system.

Background

In recent years, the world economy has rapidly developed, and environmental problems caused by the accompanying energy consumption have become more serious. Coal is the main energy consumed in the industrial field of China, and coal coking is the main link of coal pollution. Coal coking is a process of forming coke and other chemical components through a series of complex physicochemical processes such as pyrolysis, polycondensation, solidification, shrinkage and the like in a coke oven under the action of high temperature.

A large amount of flue gas can be produced in the coal coking process, the flue gas contains harmful substances such as particulate matters, sulfides, nitrogen oxides and the like, and if the flue gas is not subjected to effective purification treatment and is directly discharged into the atmosphere, serious atmospheric pollution can be caused. Therefore, in the coal coking production process, the flue gas generated by coal coking is usually subjected to dust removal and purification and then discharged after purification. And in recent years along with the environmental protection requirement is more and more strict, the fume emission index improves gradually, current device can not guarantee that the exhaust flue gas accords with emission standard completely, to handling unqualified flue gas and failing further effective processing, current processing apparatus contains a large amount of steam after carrying out the flue gas processing simultaneously, flue gas dehumidification has not been carried out, it becomes the water droplet to lead to the condensation behind the flue gas discharge, cause the white cigarette pollution in the vision, consequently, current gas cleaning processing apparatus can not satisfy the processing requirement, and simultaneously, the flue gas that the coal coking produced carries a large amount of heats, direct emission will lead to thermal white loss, it is very necessary to carry out effectual recycle to the flue gas waste heat when flue gas is handled consequently. Therefore, it is necessary to develop a flue gas treatment system for coal coking production, which can recover waste heat during flue gas treatment and has a good flue gas purification treatment effect.

SUMMERY OF THE UTILITY MODEL

To above technical problem, the utility model provides a need develop one kind and can carry out waste heat recovery when flue gas is handled to the coal coking production flue gas processing system that flue gas purification treatment is effectual.

For solving above-mentioned technical problem, a coal coking production flue gas processing system, including desulfurizing tower, denitration tower, the export of desulfurizing tower with the entry intercommunication of denitration tower, its characterized in that: the device comprises a heat exchange box and a spiral pipe arranged in the heat exchange box, wherein an inlet and an outlet of the spiral pipe penetrate through the heat exchange box from inside to outside respectively, an inlet and an outlet are formed in two ends of the heat exchange box respectively, the inlet of the heat exchange box is communicated with a draught fan A through a pipeline, the outlet of the heat exchange box is communicated with the inlet of the spray dedusting tower through a pipeline, a spray pipe is arranged at the upper part in the spray dedusting tower, a filter residue layer is arranged at the lower part of the spray dedusting tower, a plurality of spray nozzles are connected to the spray pipe, the lower end of the spray dedusting tower is communicated with a circulating pump A through a pipeline, the circulating pump is communicated with the spray pipe through a pipeline, the outlet of the spray dedusting tower is communicated with the inlet of a desulfurization tower, the outlet of a denitration tower is communicated with the inlet of a filter box, a blower is arranged at the bottom end of the filter box, a heating wire is arranged above the blower, the upper end of the filter box is communicated with a denitration detection box, a gas detector is fixedly connected in the detection box, the upper end of the detection box is communicated with an electromagnetic three-way valve and a circulation pipe respectively, and the inlet of the circulation pipe are connected with the detection box; the gas detector is in communication connection with the control module, and the electromagnetic three-way valve is controlled by the control module.

Further, desulfurizing tower, denitration tower all are provided with tower body, reaction chamber, tower body one side is connected with the reaction chamber, entry, lower extreme and the tower body intercommunication have been seted up to the reaction chamber upper end, the tower body top has been seted up export, bottom and has been passed through pipeline and circulating pump B entry intercommunication, circulating pump B exit linkage has the spray tube, the spray tube output runs through and stretches into the reaction chamber middle part, and this spray tube output is connected with the formula shower nozzle that looses.

Further, the water dispersion type spray head faces to the inlet of the reaction cavity.

Furthermore, the filter layer interval is provided with two-layerly, is HEPA filter layer and active carbon filter layer respectively.

Further, a heat preservation shell is arranged on the outer side of the heat exchange box.

Further, the inlet of the spray dust removal tower is positioned between the spray pipe and the filter residue layer, and the spray head faces the filter residue layer.

Further, the inlet of the filter box is positioned between the electric heating wire and the filter layer.

Further, a water inlet and a water outlet are formed in the spraying dust removal tower, the desulfurization tower and the denitration tower, and sealing covers are matched on the water inlet and the water outlet.

Compared with the prior art, the utility model has the following advantage:

1. the utility model can remove most of the particles in the flue gas by water spraying by arranging the spraying dedusting tower capable of water circulation and arranging the filter residue layer in the spraying dedusting tower, and the sprayed water can be directly recycled after being filtered by the filter residue layer; harmful gases in the flue gas are removed by arranging a desulfurization tower and a denitration tower; the blower and the electric heating wire are arranged at the bottom of the filter box, the filter layer is arranged above the filter box, so that the treated flue gas can be finely filtered, the flue gas filtering efficiency is accelerated, meanwhile, the water content in the flue gas is reduced by means of hot air drying and water-absorbing material filtering, and further, the flue gas is prevented from being condensed to form white smoke after being discharged; by arranging the gas detector, the electromagnetic three-way valve and the control module, the treated flue gas can be monitored in real time, the flue gas can be directly discharged after reaching the standard, and the flue gas is subjected to desulfurization and denitrification treatment again through the circulating pipe when the standard of the flue gas is detected to be not reached; through set up the spiral pipe in the heat transfer case, can heat the water in the spiral pipe through the high temperature flue gas that the coal coking produced, realize thermal recycle. The system has good coal coking flue gas treatment effect and thorough purification, can perform purification treatment on gas which does not accord with the emission standard again, can ensure that the discharged flue gas accords with the emission standard, and simultaneously performs reasonable recycling on the waste heat of the flue gas, thereby achieving the aims of energy conservation and environmental protection.

2. The utility model discloses a set up the reaction chamber with desulfurizing tower, denitration tower to set up the formula shower nozzle that looses towards the reaction chamber entry, can make circulating liquid and flue gas take place the abundant reaction, promote the purification treatment effect of flue gas desulfurization, denitration.

3. The utility model discloses a set up HEPA filter layer and active carbon filter layer at the rose box, can further carry out purification treatment to gas, detach the flue gas peculiar smell to further absorb the moisture in the flue gas, avoid the exhaust flue gas to produce the white cigarette in the vision because of the condensation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the utility model discloses desulfurizing tower, denitration tower structural schematic.

In the figure: 1. the device comprises a heat exchange box, 2, a spiral pipe, 3, an induced draft fan A,4, a spray dust removal tower, 5, a spray pipe, 6, a spray head, 7, a filter residue layer, 8, a circulating pump A,9, a desulfurization tower, 10, a denitration tower, 11, a filter box, 12, a blower, 13, an HEPA filter layer, 14, an active carbon filter layer, 15, a detection box, 16, a gas detector, 17, an induced draft fan B,18, an electromagnetic three-way valve, 19, a circulating pipe, 20, a smoke exhaust pipe, 21, a tower body, 22, a reaction cavity, 23, a circulating pump B,24, a spray pipe, 25 and a water dispersing type spray head.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in figures 1 and 2, the coal coking production flue gas treatment system comprises a heat exchange mechanism, a spraying dust removal tower 4, a desulfurization tower 9 and a denitration tower 10, wherein in order to effectively utilize the heat of flue gas, water is heated through high-temperature flue gas, the heat exchange mechanism consists of a heat exchange box 1 and a spiral pipe 2 arranged in the heat exchange box 1, an inlet and an outlet of the spiral pipe 2 respectively penetrate through the heat exchange box 1 from inside to outside, a valve is arranged at the inlet of the spiral pipe 2 and is communicated with tap water, in order to effectively utilize the hot water, the outlet of the spiral pipe 2 is communicated with a workshop bathroom system, a worker can wash and rinse by utilizing the hot water, an inlet and an outlet are respectively arranged at two ends of the heat exchange box 1, in order to preserve heat and prevent scalding events, a heat preservation shell is arranged at the outer side of the heat exchange box 1, in order to enable the flue gas to enter the spraying dust removal tower 4, the inlet of the heat exchange box 1 is communicated with an induced draft fan A3 through a pipeline, and the outlet is communicated with the inlet of the spraying dust removal tower 4 through a pipeline, an inlet of an induced draft fan A3 is communicated with a flue gas outlet of a coke oven through a pipeline, in order to filter sprayed water and recycle water resources and save energy, a spray pipe 5 is arranged at the upper part in a spray dust removal tower 4, a filter residue layer 7 is arranged at the lower part, the material of the filter residue layer 7 is PP cotton, a plurality of downward spray heads 6 are connected on the spray pipe 5, the lower end of the spray dust removal tower 4 is communicated with a circulating pump A8 through a pipeline, in order to facilitate water inlet and drainage of the spray dust removal tower 4, a water inlet and a water outlet are arranged on the spray dust removal tower 4, sealing covers are arranged on the water inlet and the water outlet, the circulating pump A8 is communicated with the spray pipe 5 through a pipeline, the inlet of the spray dust removal tower 4 is positioned between the spray pipe 5 and the filter residue layer 7, an outlet of the spray dust removal tower 4 is communicated with an inlet of a desulfurizing tower 9, and an outlet of the desulfurizing tower 9 is communicated with an inlet of a denitrifying tower 10, an outlet of the denitration tower 10 is communicated with an inlet of a filter box 11, in order to reduce moisture in the flue gas by using hot air and blow the flue gas to a filter layer, a blower 12 is arranged at the inner bottom end of the filter box 11, an electric heating wire is arranged above the blower 12, in order to further purify the flue gas and further remove the moisture in the flue gas by using a water absorbing material, two filter layers are arranged above the electric heating wire, namely an HEPA filter layer 13 and an active carbon filter layer 14, the inlet of the filter box 11 is positioned between the electric heating wire and the filter layers, in order to detect the treated gas, the flue gas which does not meet the emission standard is retreated, an outlet at the upper end of the filter box 11 is communicated with a detection box 15, a gas detector 16 is fixedly connected in the detection box 15, the gas detector 16 in the embodiment is an all-in-one composite gas detector of JK50-V model produced by Shenzhen technology Limited company, the gas detector 16 can perform signal transmission and set the qualified standard, an outlet at the upper end of the detection box 15 is communicated with an electromagnetic three-way valve 18 through a draught fan B17, the electromagnetic three-way valve 18 is respectively connected with a smoke exhaust pipe 20, and the electromagnetic three-way valve 18 is connected with the inlet of the circulation pipe 19; in order to receive signals from the gas detector 16 and control the passage of the three-way solenoid valve 18, the gas detector 16 is communicatively connected to a control module, and the three-way solenoid valve 18 is controlled by the control module.

In order to fully desulfurize and denitrate the flue gas and recycle the reaction solution, the desulfurizing tower 9 and the denitrating tower 10 are both provided with a tower body 21 and a reaction cavity 22, one side of the tower body 21 is connected with the reaction cavity 22, the upper end of the reaction cavity 22 is provided with a gas inlet, the lower end of the reaction cavity is communicated with the tower body 21, the top end of the tower body 21 is provided with an outlet, the bottom end of the tower body is communicated with an inlet of a circulating pump B23 through a pipeline, the outlet of the circulating pump B23 is connected with a liquid spraying pipe 24, in order to fully react, the output end of the liquid spraying pipe 24 penetrates through the middle part of the reaction cavity 22 and extends into the middle part of the reaction cavity 22, the output end of the liquid spraying pipe 24 is connected with a water-dispersing type spray head 25, and the water-dispersing type spray head 25 faces the inlet of the reaction cavity 22; in order to facilitate water inlet and water discharge of the desulfurization tower 9 and the denitration tower 10, a water inlet and a water outlet are formed in the tower body 21, and sealing covers are arranged on the water inlet and the water outlet.

The working process of the embodiment is as follows:

when the flue gas treatment is needed, the SO is set in the gas detector 16 in advance ₂ 、NO、NO ₂ The emission standard of (1), add water to spray dusting tower 4 first, add lime liquor to the desulfurizing tower 9, add aqueous ammonia to the denitration tower 10, open draught fan A3, the high temperature flue gas gets into heat exchange case 1, open 2 inlet valves of spiral pipe simultaneously, make water flow in spiral pipe 2, heat spiral pipe 2 water through high temperature flue gas, start circulating pump A8 simultaneously, circulating pump B23, the heating wire, hair-dryer 12, draught fan B17, flue gas gets into spray dusting tower 4 from heat exchange case 1, launch through shower 5 and shower nozzle 6 blowout under circulating pump A8 effect, spray the dust removal to the flue gas, water after spraying falls on filter residue layer 7, fall on spray dusting tower 4 bottom after filtering most, the flue gas after spraying gets into reaction chamber 22, lime liquor spouts from water-scattering formula shower nozzle 25 under circulating pump B23 effect, carry out abundant reaction in reaction chamber 22 with the flue gas, solution falls to tower body 21 after the reaction, the flue gas leads to the fact that the flue gas leads to the fact in, the flue gas is sprayedThe flue gas enters the denitration tower 10 through a pipeline, ammonia water is sprayed out from the water-dispersing type spray head 25 under the action of the circulating pump B23 and fully reacts with the flue gas in the reaction chamber 22, the reacted solution falls into the tower body 21, the flue gas enters the filter box 11, the flue gas is heated under the action of the blower 12 and the heating wire, the humidity of the flue gas is reduced, meanwhile, the flue gas is blown to flow to the HEPA filter layer 13 and the active carbon filter layer 14 under the action of the blower 12, the flue gas is further purified and dried, the filtered flue gas enters the detection box 15, the gas detector 16 carries out SO (sulfur oxide) treatment on the treated flue gas ₂ 、NO、NO ₂ When the detection result meets the set emission standard, the control module controls the electromagnetic three-way valve 18 to be communicated with the smoke exhaust pipe 20 through the circulating pipe 19, the smoke which does not meet the standard enters the reaction cavity 22 of the desulfurizing tower 9 again, and when the detection result meets the set emission standard, the control module controls the electromagnetic three-way valve 18 to be communicated with the smoke exhaust pipe 20 to be closed with the circulating pipe 19, and the smoke is directly discharged from the smoke exhaust pipe 20.

Claims

1. The utility model provides a coal coking production flue gas processing system, includes desulfurizing tower (9), denitration tower (10), the export of desulfurizing tower (9) with the entry intercommunication of denitration tower (10), its characterized in that: still include heat transfer mechanism, spray dust removal tower (4), heat transfer mechanism by heat transfer case (1) with set up in spiral pipe (2) in heat transfer case (1) are constituteed, spiral pipe (2) entry and export run through from interior to exterior respectively heat transfer case (1), entry and export have been seted up respectively at heat transfer case (1) both ends, heat transfer case (1) entry through pipeline and draught fan A (3) intercommunication, export through the pipeline with spray dust removal tower (4) entry intercommunication, upper portion is provided with shower (5) in spray dust removal tower (4), the lower part is provided with filter residue layer (7), is connected with a plurality of shower nozzles (6) on this shower (5), spray dust removal tower (4) lower extreme passes through pipeline and circulating pump A (8) intercommunication, this circulating pump A (8) through the pipeline with shower (5) intercommunication, spray tower (4) export with desulfurizing tower (9) entry intercommunication, denitration tower (10) export and filter box (11) entry intercommunication, filter box (11) end is provided with hair-dryer (12), hair-dryer (12) top is provided with hair-dryer (12) fixed detection case upper end, electric heating wire (15) top is provided with heating wire (15) and detection case (15), an outlet at the upper end of the detection box (15) is communicated with an electromagnetic three-way valve (18) through an induced draft fan B (17), the electromagnetic three-way valve (18) is respectively connected with a circulating pipe (19) and a smoke exhaust pipe (20), and the circulating pipe (19) is connected with an inlet of the denitration tower (10); the gas detector (16) is in communication connection with a control module, and the electromagnetic three-way valve (18) is controlled by the control module.

2. The coal coking production flue gas treatment system according to claim 1, characterized in that: desulfurizing tower (9), denitration tower (10) all are provided with tower body (21), reaction chamber (22), tower body (21) one side is connected with reaction chamber (22), entry, lower extreme have been seted up to reaction chamber (22) upper end with tower body (21) intercommunication, export, bottom have been seted up on tower body (21) top and have been passed through pipeline and circulating pump B (23) entry intercommunication, circulating pump B (23) exit linkage has spray tube (24), spray tube (24) output runs through and stretches into reaction chamber (22) middle part, this spray tube (24) output is connected with scattered water formula shower nozzle (25).

3. The coal coking production flue gas treatment system according to claim 2, characterized in that: the water-dispersing spray head (25) faces to the inlet of the reaction cavity (22).

4. The coal coking production flue gas treatment system according to claim 1, characterized in that: the filter layer is provided with two layers at intervals, namely a HEPA filter layer (13) and an active carbon filter layer (14).

5. The coal coking production flue gas treatment system according to claim 1, characterized in that: and a heat insulation shell is arranged on the outer side of the heat exchange box (1).

6. The coal coking production flue gas treatment system according to claim 1, characterized in that: the inlet of the spray dust removal tower (4) is positioned between the spray pipe (5) and the filter residue layer (7), and the spray head (6) faces the filter residue layer (7).

7. The coal coking production flue gas treatment system according to claim 1, characterized in that: the inlet of the filter box (11) is positioned between the electric heating wire and the filter layer.

8. The coal coking production flue gas treatment system according to claim 1, characterized in that: the spray dust removal tower (4), the desulfurization tower (9) and the denitration tower (10) are all provided with a water inlet and a water outlet, and the water inlet and the water outlet are both matched with sealing covers.