Anti-scaling anaerobic jar heating system

Abstract

The utility model provides an anti-scaling anaerobic jar heating system which comprises an anaerobic fermentation liquor heater, an anaerobic reactor, a regulating reservoir and a steam generator are respectively arranged at the inlet end of the anaerobic fermentation liquor heater, the anaerobic reactor is used for generating anaerobic fermentation liquor, the regulating reservoir is used for generating landfill leachate, and the steam generator is used for generating steam. The outlet end of the anaerobic fermentation liquor heater is respectively connected with the anaerobic reactor and the steam generator, a circulating hot air fan is arranged between the anaerobic reactor and the outlet end of the anaerobic fermentation liquor heater, and an anaerobic fermentation liquor circulating pump is arranged between the steam generator and the outlet end of the anaerobic fermentation liquor heater; a heating area, a water collection area and a vapor-liquid separation area are arranged in the anaerobic fermentation liquor heater, so that a high-temperature heat source and anaerobic fermentation liquor are isolated by circulating hot air, the problem of scaling caused by heating of the anaerobic fermentation liquor is thoroughly solved, and the problem that the activity of microorganisms is damaged by high temperature is also avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of environmental protection system especially is related to an anaerobic tank heating system of anti -incrustation. BACKGROUND

[0002] The garbage leachate of high COD concentration is produced in the process of transfer and storage of domestic waste incineration plant and domestic waste transfer station due to biochemical action such as fermentation, and the high-concentration COD garbage leachate needs to be treated by anaerobic fermentation first to reduce COD to a certain extent before subsequent advanced treatment.

[0003] When entering autumn and winter, due to the rapid drop of ambient temperature, the temperature of sewage entering the anaerobic bioreactor is very low, which in turn causes the temperature in the anaerobic reactor to drop rapidly, so a heating device needs to be set to heat the anaerobic bioreactor to ensure that the anaerobic reactor can work in a suitable temperature range.

[0004] The common heater adopts the form of heat exchanger (tubular or plate type), the heat source generally adopts steam (the temperature is generally above 100 DEG C), and the cold side is the circulating anaerobic fermentation liquid. Since the anaerobic fermentation liquid contains a small amount of suspended solids and a certain concentration of organic matter, and the temperature of the hot side is high, a scale layer is formed on the pipe wall / plate wall of the cold side of the heat exchanger, thereby greatly reducing the heat exchange effect of the heat exchanger, and even causing the heat exchange amount to be basically zero, and the heat exchanger must be disassembled for mechanical cleaning. This not only affects production, but also affects the service life of related equipment due to frequent mechanical cleaning.

[0005] There is also a way of directly introducing steam into the anaerobic fermentation liquid to heat the anaerobic reactor, but generally the suitable survival temperature of anaerobic microorganisms is 30 DEG C~50 DEG C, and the heating steam is generally above 100 DEG C. Although this process solves the problem of scale formation of the heat exchanger, it causes high-temperature damage to the microorganisms in the anaerobic reactor, reduces the activity of the microorganisms, and further reduces the treatment efficiency of the microorganisms. UTILITY MODEL CONTENTS

[0006] The main purpose of the utility model is to provide an anaerobic tank heating system with anti-scale function, which solves the problem of scale formation of the traditional heater and high-temperature damage to the microorganisms in the anaerobic reactor.

[0007] To solve the above technical problems, the utility model adopts the technical scheme of an anaerobic tank heating system with anti-scale function, which comprises an anaerobic fermentation liquid heater, and the inlet end of the anaerobic fermentation liquid heater is respectively provided with an anaerobic reactor, a regulating tank and a steam generator.

[0008] The outlet end of the anaerobic fermentation liquid heater is connected with the anaerobic reactor and the steam generator respectively, a circulating hot air fan is arranged between the anaerobic reactor and the outlet end of the anaerobic fermentation liquid heater, and an anaerobic fermentation liquid circulating pump is arranged between the steam generator and the outlet end of the anaerobic fermentation liquid heater.

[0009] The anaerobic fermentation liquid heater is internally provided with a heating zone, a water collecting zone and a vapor-liquid separation zone.

[0010] In the preferred embodiment, the circulating hot air heater is a plate heat exchanger, and the circulating hot air heater is used to mix the heating steam generated by the steam generator with the circulating hot air and blow them into the anaerobic fermentation liquid heater.

[0011] In the preferred embodiment, the bottom of the heating zone is provided with a circulating hot air distributor, which can uniformly distribute the circulating hot air in the heating zone and ensure uniform heating.

[0012] In the preferred embodiment, a water retaining weir plate is arranged between the heating zone and the water collecting zone to prevent the circulating hot air from mixing into the water outlet and causing the anaerobic fermentation liquid circulating pump to produce cavitation or gas lock.

[0013] In the preferred embodiment, the vapor-liquid separation zone is arranged at the upper part of the anaerobic fermentation liquid heater, and a demister is arranged at one side of the upper part to ensure that the circulating hot air and the anaerobic fermentation liquid can be completely separated.

[0014] In the preferred embodiment, after being separated from the anaerobic fermentation liquid in the anaerobic fermentation heater, the circulating hot air is sucked into the circulating hot air fan, is boosted by the circulating hot air fan and is then sent into the circulating hot air heater for re-heating and temperature rising.

[0015] In the preferred embodiment, the flow rate of the circulating hot air is 0.5-50 times the total flow rate of the anaerobic fermentation liquid and the landfill leachate.

[0016] In the preferred embodiment, the outlet temperature of the circulating hot air in the circulating hot air heater is controlled to be 30-50℃.

[0017] In the preferred embodiment, the circulation amount of the anaerobic fermentation liquid is 5-20 times the inflow amount of the landfill leachate.

[0018] The utility model provides a kind of anti-fouling anaerobic tank heating system, with the following beneficial effects: compared with traditional anaerobic heating mode, the system uses circulating hot air to heat anaerobic fermentation liquid, circulating hot air temperature is controlled within 50 DEG C, to ensure that not to bring high temperature damage to microorganism, while hot air is directly contacted with anaerobic fermentation liquid, solve the fouling problem of heating metal wall surface in indirect heating process, and circulating hot air is separated after heating and cooling, and then indirectly exchanges heat with steam to rise temperature circulation, so that high-temperature heat source is isolated from anaerobic fermentation liquid by circulating hot air, completely solve the problem of anaerobic fermentation liquid heating and fouling, and also not bring the problem of high-temperature damage to microbial activity. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described below in combination with the drawings and embodiments:

[0020] Figure 1 is the system schematic diagram of the utility model anaerobic tank heating system.

[0021] In the figure: circulating hot air heater 1;Anaerobic fermentation liquid heater 2;Circulating hot air distributor 3;Water weir plate 4;Demister 5;Anaerobic fermentation liquid circulating pump 6;Circulating hot air fan 7;Anaerobic reactor 8;Adjustment pool 9;Steam generator 10. DETAILED DESCRIPTION

[0022] Embodiment 1

[0023] As Figure 1 Indicated, a kind of anti-fouling anaerobic tank heating system, including anaerobic fermentation liquid heater 2, the inlet end of anaerobic fermentation liquid heater 2 is equipped with anaerobic reactor 8, adjustment pool 9 and steam generator 10 respectively, anaerobic reactor 8 is used to generate anaerobic fermentation liquid, adjustment pool 9 is used to generate landfill leachate;

[0024] The outlet end of anaerobic fermentation liquid heater 2 is connected with anaerobic reactor 8 and steam generator 10 respectively, circulating hot air fan 7 is equipped between the outlet end of anaerobic reactor 8 and anaerobic fermentation liquid heater 2, anaerobic fermentation liquid circulating pump 6 is equipped between the outlet end of steam generator 10 and anaerobic fermentation liquid heater 2;

[0025] The inside of anaerobic fermentation liquid heater 2 is equipped with heating zone, water collection zone and vapor-liquid separation zone.

[0026] In preferred scheme, circulating hot air heater 1 is plate heat exchanger, circulating hot air heater 1 is used to mix and blow into the inside of anaerobic fermentation liquid heater 2 with the heating steam generated by steam generator 10 and circulating hot air.

[0027] In preferred scheme, the bottom of heating zone is equipped with circulating hot air distributor 3, circulating hot air distributor 3 can evenly distribute circulating hot air in heating zone, guaranteeing that heating is uniform.

[0028] In preferred scheme, water weir plate 4 is equipped between heating zone and water collection zone and is separated, guaranteeing that circulating hot air cannot mix into effluent and cause that anaerobic fermentation liquid circulating pump 6 generates cavitation or gas lock.

[0029] In preferred scheme, vapor-liquid separation zone is in the upper portion of anaerobic fermentation liquid heater 2, and demister 5 is equipped on one side of upper portion, guaranteeing that circulating hot air and anaerobic fermentation liquid can be completely separated.

[0030] In the preferred embodiment, the circulating hot air is separated from the anaerobic fermentation liquid inside the anaerobic fermentation heater 2 and then sucked into the circulating hot air fan 7, which is pressurized and then sent to the circulating hot air heater 1 for heating again.

[0031] In the preferred embodiment, the flow rate of the circulating hot air is 0.5-50 times that of the total of the anaerobic fermentation liquid and the landfill leachate.

[0032] In the preferred embodiment, the outlet temperature of the circulating hot air heater 1 is controlled at 30-50°C.

[0033] In the preferred embodiment, the circulation amount of the anaerobic fermentation liquid is 5-20 times that of the landfill leachate.

[0034] The detailed working process of the anti-fouling anaerobic tank heating system is as follows: the anaerobic fermentation liquid overflowing from the anaerobic fermentation reactor 8 and the landfill leachate from the upstream process (adjustment tank 9) enter the anaerobic fermentation liquid heater 2 together, the mixed liquid is directly contacted with the heated circulating hot air to absorb heat and then overflows to the water collecting area of the anaerobic fermentation liquid heater 2 through the water weir plate 4, and is sent back to the anaerobic reactor 8 through the anaerobic fermentation liquid circulating pump 6 for reaction.

[0035] The circulating hot air heater 1 is a plate heat exchanger, and the circulating hot air is heated in the circulating hot air heater 1 by indirect heat exchange with the heated steam generated by the steam generator 10 and then blown into the anaerobic fermentation liquid heater 2. The anaerobic fermentation liquid heater 2 is divided into a heating area, a water collecting area and a vapor-liquid separation area.

[0036] The bottom of the heating area is provided with a circulating hot air distributor 3, which can uniformly distribute the circulating hot air in the heating area to ensure uniform heating; the heating area and the water collecting area are separated by the water weir plate 4 to ensure that the circulating hot air does not mix into the outlet water to cause pump cavitation or gas lock; the vapor-liquid separation area is at the upper part of the anaerobic fermentation liquid heater 2 and is composed of an upper space and a demister 5 to ensure that the circulating hot air and the anaerobic fermentation liquid can be completely separated.

[0037] The separated circulating hot air is sucked into the circulating hot air fan 7, which is like the "power engine" of the entire circulating hot air circulation system. It pressurizes the sucked circulating hot air to give it enough power so that it can be transported to the circulating hot air heater 1 again to start a new heating and warming process, and then enter the anaerobic fermentation liquid heater 2 again for the next heat exchange with the anaerobic fermentation liquid. Through the close cooperation and collaborative work of each component, the circulating hot air and the anaerobic fermentation liquid are thus sequentially circulated to complete the heat exchange, ensuring that the entire process system runs stably and efficiently, meeting the corresponding production and treatment requirements.

[0038] The above-mentioned embodiments are only preferred technical solutions of the present application, and should not be regarded as limitations of the present application. The protection scope of the present application should be the technical solutions recited in the claims, including equivalent replacement solutions of the technical features recited in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present application.

Claims

1. An anti-fouling anaerobic tank heating system characterized by: The anaerobic fermentation liquid heater (2) is provided with an anaerobic reactor (8), an adjusting tank (9) and a steam generator (10) at its inlet end respectively, the anaerobic reactor (8) is used for producing anaerobic fermentation liquid, and the adjusting tank (9) is used for producing landfill leachate; The outlet end of the anaerobic fermentation liquid heater (2) is connected with the anaerobic reactor (8) and the steam generator (10) respectively, a circulating hot air fan (7) is arranged between the anaerobic reactor (8) and the outlet end of the anaerobic fermentation liquid heater (2), and an anaerobic fermentation liquid circulating pump (6) is arranged between the steam generator (10) and the outlet end of the anaerobic fermentation liquid heater (2); The inside of the anaerobic fermentation liquid heater (2) is provided with a heating zone, a water collecting zone and a vapor-liquid separation zone.

2. The anti-fouling anaerobic tank heating system of claim 1, wherein the circulation is characterized by The hot air heater (1) is a plate heat exchanger, and the circulating hot air heater (1) is used for mixing the heating steam generated by the steam generator (10) with the circulating hot air and blowing them into the inside of the anaerobic fermentation liquid heater (2).

3. The anti-fouling anaerobic tank heating system of claim 1, wherein: The bottom of the heating zone is provided with a circulating hot air distributor (3), which can uniformly distribute the circulating hot air in the heating zone and ensure uniform heating.

4. The anti-fouling anaerobic tank heating system of claim 3, wherein: The heating zone and the water collecting zone are separated by a water retaining weir plate (4), so that the circulating hot air cannot mix into the water to cause the anaerobic fermentation liquid circulating pump (6) to produce cavitation or gas binding.

5. The anti-fouling anaerobic tank heating system of claim 1, wherein: The vapor-liquid separation zone is at the upper part of the anaerobic fermentation liquid heater (2), and a demister (5) is arranged at one side of the upper part, so that the circulating hot air and the anaerobic fermentation liquid can be completely separated.

6. The anti-scaling anaerobic tank heating system according to claim 5, characterized in that: circulation... The hot air is separated from the anaerobic fermentation liquid in the inside of the anaerobic fermentation liquid heater (2) and is then sucked into the circulating hot air fan (7), which is pressurized and then sent into the circulating hot air heater (1) for re-heating and temperature rising.

7. The anti-fouling anaerobic tank heating system of claim 6, wherein: The flow rate of the circulating hot air is 0.5-50 times that of the total of the anaerobic fermentation liquid and the landfill leachate.

8. The anti-fouling anaerobic tank heating system of claim 6, wherein: The outlet temperature of the circulating hot air in the circulating hot air heater (1) is controlled at 30-50 DEG C.

9. The anti-fouling anaerobic tank heating system of claim 5, wherein: The circulation amount of the anaerobic fermentation liquid is 5-20 times that of the landfill leachate.

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